.B \-h
prints a usage statement and exits
.TP
+.B \-P
+specifies that the
+.B service1 service2 ...
+arguments are to be treated as services for which credentials should
+be acquired using constrained delegation. This option is only valid
+when used in conjunction with protocol transition.
+.TP
.B \-S sname
specifies that krb5_sname_to_principal() will be used to build
principal names. If this flag is specified, the
and
.B sname
is interpreted as the service name.
+.TP
+.B \-U for_user
+specifies that protocol transition (S4U2Self) is to be used to acquire
+a ticket on behalf of
+.B for_user.
+If constrained delegation is not requested, the service name
+must match the credentials cache client principal.
.SH ENVIRONMENT
.B Kvno
uses the following environment variable:
static void xusage()
{
- fprintf(stderr, "usage: %s [-C] [-u] [-c ccache] [-e etype] [-k keytab] [-S sname] service1 service2 ...\n",
- prog);
+ fprintf(stderr, "usage: %s [-C] [-u] [-c ccache] [-e etype]\n", prog);
+ fprintf(stderr, "\t[-k keytab] [-S sname] [-U for_user [-P]]\n");
+ fprintf(stderr, "\tservice1 service2 ...\n");
exit(1);
}
static void do_v5_kvno (int argc, char *argv[],
char *ccachestr, char *etypestr, char *keytab_name,
- char *sname, int canon, int unknown);
+ char *sname, int canon, int unknown,
+ char *for_user, int proxy);
#include <com_err.h>
static void extended_com_err_fn (const char *, errcode_t, const char *,
{
int option;
char *etypestr = NULL, *ccachestr = NULL, *keytab_name = NULL;
- char *sname = NULL;
- int canon = 0, unknown = 0;
+ char *sname = NULL, *for_user = NULL;
+ int canon = 0, unknown = 0, proxy = 0;
set_com_err_hook (extended_com_err_fn);
prog = strrchr(argv[0], '/');
prog = prog ? (prog + 1) : argv[0];
- while ((option = getopt(argc, argv, "uCc:e:hk:qS:")) != -1) {
+ while ((option = getopt(argc, argv, "uCc:e:hk:qPS:U:")) != -1) {
switch (option) {
case 'C':
canon = 1;
case 'q':
quiet = 1;
break;
+ case 'P':
+ proxy = 1; /* S4U2Proxy - constrained delegation */
+ break;
case 'S':
sname = optarg;
if (unknown == 1){
xusage();
}
break;
+ case 'U':
+ for_user = optarg; /* S4U2Self - protocol transition */
+ break;
default:
xusage();
break;
}
}
+ if (proxy) {
+ if (keytab_name == NULL) {
+ fprintf(stderr, "Option -P (constrained delegation) "
+ "requires keytab to be specified\n");
+ xusage();
+ } else if (for_user == NULL) {
+ fprintf(stderr, "Option -P (constrained delegation) requires "
+ "option -U (protocol transition)\n");
+ xusage();
+ }
+ }
+
if ((argc - optind) < 1)
xusage();
do_v5_kvno(argc - optind, argv + optind,
- ccachestr, etypestr, keytab_name, sname, canon, unknown);
+ ccachestr, etypestr, keytab_name, sname,
+ canon, unknown, for_user, proxy);
return 0;
}
-#include <krb5.h>
+#include <k5-int.h>
static krb5_context context;
static void extended_com_err_fn (const char *myprog, errcode_t code,
const char *fmt, va_list args)
static void do_v5_kvno (int count, char *names[],
char * ccachestr, char *etypestr, char *keytab_name,
- char *sname, int canon, int unknown)
+ char *sname, int canon, int unknown, char *for_user,
+ int proxy)
{
krb5_error_code ret;
int i, errors;
krb5_enctype etype;
krb5_ccache ccache;
krb5_principal me;
- krb5_creds in_creds, *out_creds;
- krb5_ticket *ticket;
- char *princ;
+ krb5_creds in_creds;
krb5_keytab keytab = NULL;
+ krb5_principal for_user_princ = NULL;
+ krb5_flags options;
ret = krb5_init_context(&context);
if (ret) {
}
}
+ if (for_user) {
+ ret = krb5_parse_name_flags(context, for_user,
+ KRB5_PRINCIPAL_PARSE_ENTERPRISE,
+ &for_user_princ);
+ if (ret) {
+ com_err(prog, ret, "while parsing principal name %s", for_user);
+ exit(1);
+ }
+ }
+
ret = krb5_cc_get_principal(context, ccache, &me);
if (ret) {
com_err(prog, ret, "while getting client principal name");
errors = 0;
+ options = 0;
+ if (canon)
+ options |= KRB5_GC_CANONICALIZE;
+
for (i = 0; i < count; i++) {
- memset(&in_creds, 0, sizeof(in_creds));
+ krb5_principal server = NULL;
+ krb5_ticket *ticket = NULL;
+ krb5_creds *out_creds = NULL;
+ char *princ = NULL;
- in_creds.client = me;
+ memset(&in_creds, 0, sizeof(in_creds));
if (sname != NULL) {
ret = krb5_sname_to_principal(context, names[i],
sname, KRB5_NT_SRV_HST,
- &in_creds.server);
+ &server);
} else {
- ret = krb5_parse_name(context, names[i], &in_creds.server);
+ ret = krb5_parse_name(context, names[i], &server);
}
if (ret) {
if (!quiet)
com_err(prog, ret, "while parsing principal name %s", names[i]);
- errors++;
- continue;
+ goto error;
}
if (unknown == 1) {
- krb5_princ_type(context, in_creds.server) = KRB5_NT_UNKNOWN;
+ krb5_princ_type(context, server) = KRB5_NT_UNKNOWN;
}
- ret = krb5_unparse_name(context, in_creds.server, &princ);
+ ret = krb5_unparse_name(context, server, &princ);
if (ret) {
com_err(prog, ret,
"while formatting parsed principal name for '%s'",
names[i]);
- errors++;
- continue;
+ goto error;
}
in_creds.keyblock.enctype = etype;
- ret = krb5_get_credentials(context, canon ? KRB5_GC_CANONICALIZE : 0,
- ccache, &in_creds, &out_creds);
+ if (for_user) {
+ if (!proxy &&
+ !krb5_principal_compare(context, me, server)) {
+ com_err(prog, EINVAL,
+ "client and server principal names must match");
+ goto error;
+ }
- krb5_free_principal(context, in_creds.server);
+ in_creds.client = for_user_princ;
+ in_creds.server = me;
+
+ ret = krb5_get_credentials_for_user(context, options, ccache,
+ &in_creds, NULL, &out_creds);
+ } else {
+ in_creds.client = me;
+ in_creds.server = server;
+ ret = krb5_get_credentials(context, options, ccache,
+ &in_creds, &out_creds);
+ }
if (ret) {
com_err(prog, ret, "while getting credentials for %s", princ);
-
- krb5_free_unparsed_name(context, princ);
-
- errors++;
- continue;
+ goto error;
}
/* we need a native ticket */
ret = krb5_decode_ticket(&out_creds->ticket, &ticket);
if (ret) {
com_err(prog, ret, "while decoding ticket for %s", princ);
- krb5_free_creds(context, out_creds);
- krb5_free_unparsed_name(context, princ);
-
- errors++;
- continue;
+ goto error;
}
-
+
if (keytab) {
ret = krb5_server_decrypt_ticket_keytab(context, keytab, ticket);
if (ret) {
- if (!quiet)
- printf("%s: kvno = %d, keytab entry invalid", princ, ticket->enc_part.kvno);
+ if (!quiet) {
+ fprintf(stderr, "%s: kvno = %d, keytab entry invalid\n",
+ princ, ticket->enc_part.kvno);
+ }
com_err(prog, ret, "while decrypting ticket for %s", princ);
- krb5_free_ticket(context, ticket);
- krb5_free_creds(context, out_creds);
- krb5_free_unparsed_name(context, princ);
-
- errors++;
- continue;
+ goto error;
}
if (!quiet)
- printf("%s: kvno = %d, keytab entry valid\n", princ, ticket->enc_part.kvno);
+ printf("%s: kvno = %d, keytab entry valid\n",
+ princ, ticket->enc_part.kvno);
+ if (proxy) {
+ krb5_free_creds(context, out_creds);
+ out_creds = NULL;
+
+ in_creds.client = ticket->enc_part2->client;
+ in_creds.server = server;
+
+ ret = krb5_get_credentials_for_proxy(context,
+ KRB5_GC_CANONICALIZE,
+ ccache,
+ &in_creds,
+ ticket,
+ &out_creds);
+ if (ret) {
+ com_err(prog, ret,
+ "%s: constrained delegation failed", princ);
+ goto error;
+ }
+ }
} else {
if (!quiet)
printf("%s: kvno = %d\n", princ, ticket->enc_part.kvno);
}
- krb5_free_creds(context, out_creds);
- krb5_free_unparsed_name(context, princ);
+ continue;
+
+error:
+ if (server != NULL)
+ krb5_free_principal(context, server);
+ if (ticket != NULL)
+ krb5_free_ticket(context, ticket);
+ if (out_creds != NULL)
+ krb5_free_creds(context, out_creds);
+ if (princ != NULL)
+ krb5_free_unparsed_name(context, princ);
+ errors++;
}
if (keytab)
krb5_kt_close(context, keytab);
krb5_free_principal(context, me);
+ krb5_free_principal(context, for_user_princ);
krb5_cc_close(context, ccache);
krb5_free_context(context);
krb5_data auth_package;
} krb5_pa_for_user;
+typedef struct _krb5_s4u_userid {
+ krb5_int32 nonce;
+ krb5_principal user;
+ krb5_data subject_cert;
+ krb5_flags options;
+} krb5_s4u_userid;
+
+#define KRB5_S4U_OPTS_CHECK_LOGON_HOURS 0x40000000 /* check logon hour restrictions */
+#define KRB5_S4U_OPTS_USE_REPLY_KEY_USAGE 0x20000000 /* sign with usage 27 instead of 26 */
+
+typedef struct _krb5_pa_s4u_x509_user {
+ krb5_s4u_userid user_id;
+ krb5_checksum cksum;
+} krb5_pa_s4u_x509_user;
+
enum {
KRB5_FAST_ARMOR_AP_REQUEST = 0x1
};
(krb5_context, krb5_pa_enc_ts *);
void KRB5_CALLCONV krb5_free_pa_for_user
(krb5_context, krb5_pa_for_user * );
+void KRB5_CALLCONV krb5_free_s4u_userid_contents
+ (krb5_context, krb5_s4u_userid * );
+void KRB5_CALLCONV krb5_free_pa_s4u_x509_user
+ (krb5_context, krb5_pa_s4u_x509_user * );
void KRB5_CALLCONV krb5_free_pa_svr_referral_data
(krb5_context, krb5_pa_svr_referral_data * );
void KRB5_CALLCONV krb5_free_pa_server_referral_data
krb5_error_code encode_krb5_pa_for_user
(const krb5_pa_for_user * , krb5_data **);
+krb5_error_code encode_krb5_s4u_userid
+ (const krb5_s4u_userid * , krb5_data **);
+
+krb5_error_code encode_krb5_pa_s4u_x509_user
+ (const krb5_pa_s4u_x509_user * , krb5_data **);
+
krb5_error_code encode_krb5_pa_svr_referral_data
(const krb5_pa_svr_referral_data * , krb5_data **);
krb5_error_code decode_krb5_pa_for_user
(const krb5_data *, krb5_pa_for_user **);
+krb5_error_code decode_krb5_pa_s4u_x509_user
+ (const krb5_data *, krb5_pa_s4u_x509_user **);
+
krb5_error_code decode_krb5_pa_svr_referral_data
(const krb5_data *, krb5_pa_svr_referral_data **);
krb5_pa_data * const *,
const krb5_data *,
krb5_creds *,
+ krb5_error_code (*gcvt_fct)(krb5_context,
+ krb5_keyblock *,
+ krb5_kdc_req *,
+ void *),
+ void *gcvt_data,
krb5_response * , krb5_keyblock **subkey);
/* The subkey field is an output parameter; if a
* tgs-rep is received then the subkey will be filled
const krb5_keyblock *privsvr_key,
krb5_data *data);
+krb5_error_code KRB5_CALLCONV
+krb5_get_credentials_for_user(krb5_context context, krb5_flags options,
+ krb5_ccache ccache,
+ krb5_creds *in_creds,
+ krb5_data *cert,
+ krb5_creds **out_creds);
+
+krb5_error_code KRB5_CALLCONV
+krb5_get_credentials_for_proxy(krb5_context context,
+ krb5_flags options,
+ krb5_ccache ccache,
+ krb5_creds *in_creds,
+ krb5_ticket *evidence_tkt,
+ krb5_creds **out_creds);
+
krb5_error_code krb5int_parse_enctype_list(krb5_context context, char *profstr,
krb5_enctype *default_list,
krb5_enctype **result);
#define KRB5_KDB_SUPPORT_DESMD5 0x00004000
#define KRB5_KDB_NEW_PRINC 0x00008000
#define KRB5_KDB_OK_AS_DELEGATE 0x00100000
+#define KRB5_KDB_OK_TO_AUTH_AS_DELEGATE 0x00200000 /* S4U2Self OK */
+#define KRB5_KDB_NO_AUTH_DATA_REQUIRED 0x00400000
/* Creation flags */
#define KRB5_KDB_CREATE_BTREE 0x00000001
#ifndef KRB5_KDB5_EXT__
#define KRB5_KDB5_EXT__
-/* Allowed to use protocol transition */
-#define KRB5_KDB_OK_TO_AUTH_AS_DELEGATE 0x00200000
-/* Service does not require authorization data */
-#define KRB5_KDB_NO_AUTH_DATA_REQUIRED 0x00400000
/* Private flag used to indicate principal is local TGS */
#define KRB5_KDB_TICKET_GRANTING_SERVICE 0x01000000
/* Private flag used to indicate xrealm relationship is non-transitive */
/* Defined in KDC referrals draft */
#define KRB5_KEYUSAGE_PA_REFERRAL 26 /* XXX note conflict with above */
+
+/* Defined in [MS-SFU] */
+#define KRB5_KEYUSAGE_PA_S4U_X509_USER_REQUEST 26 /* XXX note conflict with above */
+#define KRB5_KEYUSAGE_PA_S4U_X509_USER_REPLY 27 /* XXX note conflict with above */
+
/* define in draft-ietf-krb-wg-preauth-framework*/
#define KRB5_KEYUSAGE_FAST_REQ_CHKSUM 50
#define KRB5_KEYUSAGE_FAST_ENC 51
#define KRB5_GC_USER_USER 1 /* want user-user ticket */
#define KRB5_GC_CACHED 2 /* want cached ticket only */
#define KRB5_GC_CANONICALIZE 4 /* set canonicalize KDC option */
+#define KRB5_GC_NO_STORE 8 /* do not store in credentials cache */
+#define KRB5_GC_FORWARDABLE 16 /* acquire forwardable tickets */
+#define KRB5_GC_NO_TRANSIT_CHECK 32 /* disable transited check */
+#define KRB5_GC_CONSTRAINED_DELEGATION 64 /* constrained delegation */
krb5_error_code KRB5_CALLCONV krb5_get_credentials
(krb5_context,
{"allow_svr", 9, KRB5_KDB_DISALLOW_SVR, 1},
{"password_changing_service", 25, KRB5_KDB_PWCHANGE_SERVICE, 0 },
{"support_desmd5", 14, KRB5_KDB_SUPPORT_DESMD5, 0 },
-{"ok_as_delegate", 14, KRB5_KDB_OK_AS_DELEGATE, 0 }
+{"ok_as_delegate", 14, KRB5_KDB_OK_AS_DELEGATE, 0 },
+{"ok_to_auth_as_delegate", 22, KRB5_KDB_OK_TO_AUTH_AS_DELEGATE, 0 },
+{"no_auth_data_required", 21, KRB5_KDB_NO_AUTH_DATA_REQUIRED, 0},
};
static char *prflags[] = {
"UNKNOWN_0x00040000", /* 0x00040000 */
"UNKNOWN_0x00080000", /* 0x00080000 */
"OK_AS_DELEGATE", /* 0x00100000 */
+ "OK_TO_AUTH_AS_DELEGATE", /* 0x00200000 */
+ "NO_AUTH_DATA_REQUIRED", /* 0x00400000 */
};
char *getenv();
"\t\tallow_postdated allow_forwardable allow_tgs_req allow_renewable\n",
"\t\tallow_proxiable allow_dup_skey allow_tix requires_preauth\n",
"\t\trequires_hwauth needchange allow_svr password_changing_service\n"
- "\t\tok_as_delegate\n"
+ "\t\tok_as_delegate ok_to_auth_as_delegate no_auth_data_required\n"
"\nwhere,\n\t[-x db_princ_args]* - any number of database specific arguments.\n"
"\t\t\tLook at each database documentation for supported arguments\n");
}
"\t\tallow_postdated allow_forwardable allow_tgs_req allow_renewable\n",
"\t\tallow_proxiable allow_dup_skey allow_tix requires_preauth\n",
"\t\trequires_hwauth needchange allow_svr password_changing_service\n"
- "\t\tok_as_delegate\n"
+ "\t\tok_as_delegate ok_to_auth_as_delegate no_auth_data_required\n"
"\nwhere,\n\t[-x db_princ_args]* - any number of database specific arguments.\n"
"\t\t\tLook at each database documentation for supported arguments\n"
);
krb5_enc_tkt_part *header_enc_tkt = NULL; /* ticket granting or evidence ticket */
krb5_db_entry client, krbtgt;
int c_nprincs = 0, k_nprincs = 0;
- krb5_pa_for_user *for_user = NULL; /* protocol transition request */
+ krb5_pa_s4u_x509_user *s4u_x509_user = NULL; /* protocol transition request */
krb5_authdata **kdc_issued_auth_data = NULL; /* auth data issued by KDC */
unsigned int c_flags = 0, s_flags = 0; /* client/server KDB flags */
char *s4u_name = NULL;
krb5_data scratch;
session_key.contents = NULL;
-
+
retval = decode_krb5_tgs_req(pkt, &request);
if (retval)
return retval;
!krb5_principal_compare(kdc_context, tgs_server, server.princ);
/* Check for protocol transition */
- errcode = kdc_process_s4u2self_req(kdc_context, request, header_enc_tkt->client,
- &server, header_enc_tkt->session, kdc_time,
- &for_user, &client, &c_nprincs, &status);
+ errcode = kdc_process_s4u2self_req(kdc_context,
+ request,
+ header_enc_tkt->client,
+ &server,
+ subkey,
+ header_enc_tkt->session,
+ kdc_time,
+ &s4u_x509_user,
+ &client,
+ &c_nprincs,
+ &status);
if (errcode)
goto cleanup;
- if (for_user != NULL)
+ if (s4u_x509_user != NULL)
setflag(c_flags, KRB5_KDB_FLAG_PROTOCOL_TRANSITION);
/*
/* processing of any of these flags. For example, some */
/* realms may refuse to issue renewable tickets */
- if (isflagset(request->kdc_options, KDC_OPT_FORWARDABLE))
+ if (isflagset(request->kdc_options, KDC_OPT_FORWARDABLE)) {
setflag(enc_tkt_reply.flags, TKT_FLG_FORWARDABLE);
- if (isflagset(c_flags, KRB5_KDB_FLAG_PROTOCOL_TRANSITION)) {
- if (!krb5_is_tgs_principal(server.princ) &&
- is_local_principal(server.princ)) {
- if (isflagset(server.attributes, KRB5_KDB_OK_TO_AUTH_AS_DELEGATE))
- setflag(enc_tkt_reply.flags, TKT_FLG_FORWARDABLE);
- else
+
+ if (isflagset(c_flags, KRB5_KDB_FLAG_PROTOCOL_TRANSITION)) {
+ /*
+ * If S4U2Self principal is not forwardable, then mark ticket as
+ * unforwardable. This behaviour matches Windows, but it is
+ * different to the MIT AS-REQ path, which returns an error
+ * (KDC_ERR_POLICY) if forwardable tickets cannot be issued.
+ *
+ * Consider this block the S4U2Self equivalent to
+ * validate_forwardable().
+ */
+ if (c_nprincs &&
+ isflagset(client.attributes, KRB5_KDB_DISALLOW_FORWARDABLE))
+ clear(enc_tkt_reply.flags, TKT_FLG_FORWARDABLE);
+ /*
+ * OK_TO_AUTH_AS_DELEGATE must be set on the service requesting
+ * S4U2Self in order for forwardable tickets to be returned.
+ */
+ else if (!is_referral &&
+ !isflagset(server.attributes, KRB5_KDB_OK_TO_AUTH_AS_DELEGATE))
clear(enc_tkt_reply.flags, TKT_FLG_FORWARDABLE);
}
- if (isflagset(client.attributes, KRB5_KDB_DISALLOW_FORWARDABLE))
- clear(enc_tkt_reply.flags, TKT_FLG_FORWARDABLE);
}
+
if (isflagset(request->kdc_options, KDC_OPT_FORWARDED)) {
setflag(enc_tkt_reply.flags, TKT_FLG_FORWARDED);
enc_tkt_reply.times.starttime = 0;
if (isflagset(c_flags, KRB5_KDB_FLAG_PROTOCOL_TRANSITION)) {
- errcode = krb5_unparse_name(kdc_context, for_user->user, &s4u_name);
+ errcode = krb5_unparse_name(kdc_context, s4u_x509_user->user_id.user, &s4u_name);
} else if (isflagset(c_flags, KRB5_KDB_FLAG_CONSTRAINED_DELEGATION)) {
errcode = krb5_unparse_name(kdc_context, header_enc_tkt->client, &s4u_name);
} else {
enc_tkt_reply.authorization_data = NULL;
if (isflagset(c_flags, KRB5_KDB_FLAG_PROTOCOL_TRANSITION) &&
- is_local_principal(header_enc_tkt->client))
- enc_tkt_reply.client = for_user->user;
+ !isflagset(c_flags, KRB5_KDB_FLAG_CROSS_REALM))
+ enc_tkt_reply.client = s4u_x509_user->user_id.user;
else
enc_tkt_reply.client = header_enc_tkt->client;
&encrypting_key, /* U2U or server key */
pkt,
request,
- for_user ? for_user->user : NULL,
+ s4u_x509_user ?
+ s4u_x509_user->user_id.user : NULL,
header_enc_tkt,
&enc_tkt_reply);
if (errcode) {
/* Start assembling the response */
reply.msg_type = KRB5_TGS_REP;
reply.padata = 0;/* always */
+ if (isflagset(c_flags, KRB5_KDB_FLAG_PROTOCOL_TRANSITION) &&
+ find_pa_data(request->padata, KRB5_PADATA_S4U_X509_USER) != NULL) {
+ errcode = kdc_make_s4u2self_rep(kdc_context,
+ subkey,
+ header_ticket->enc_part2->session,
+ s4u_x509_user,
+ &reply,
+ &reply_encpart);
+ if (errcode) {
+ status = "KDC_RETURN_S4U2SELF_PADATA";
+ goto cleanup;
+ }
+ }
+
reply.client = enc_tkt_reply.client;
reply.enc_part.kvno = 0;/* We are using the session key */
reply.ticket = &ticket_reply;
krb5_db_free_principal(kdc_context, &krbtgt, k_nprincs);
if (c_nprincs)
krb5_db_free_principal(kdc_context, &client, c_nprincs);
- if (for_user != NULL)
- krb5_free_pa_for_user(kdc_context, for_user);
+ if (s4u_x509_user != NULL)
+ krb5_free_pa_s4u_x509_user(kdc_context, s4u_x509_user);
if (kdc_issued_auth_data != NULL)
krb5_free_authdata(kdc_context, kdc_issued_auth_data);
if (s4u_name != NULL)
free(s4u_name);
if (subkey != NULL)
krb5_free_keyblock(kdc_context, subkey);
+ if (reply.padata)
+ krb5_free_pa_data(kdc_context, reply.padata);
+ if (reply_encpart.enc_padata)
+ krb5_free_pa_data(kdc_context, reply_encpart.enc_padata);
return retval;
}
}
if (ad_nprincs != 0) {
+ /*
+ * This code was submitted by Novell; however there is no
+ * mention in [MS-SFU] of needing to examine the authorization
+ * data to clear the forwardable flag. My understanding is that
+ * the state of the forwardable flag is propagated through the
+ * cross-realm TGTs.
+ */
+#if 0
if (isflagset(flags, KRB5_KDB_FLAG_PROTOCOL_TRANSITION) &&
isflagset(ad_entry.attributes, KRB5_KDB_DISALLOW_FORWARDABLE))
clear(enc_tkt_reply->flags, TKT_FLG_FORWARDABLE);
+#endif
krb5_db_free_principal(context, &ad_entry, ad_nprincs);
return (retval);
}
-static krb5_boolean
-enctype_requires_etype_info_2(krb5_enctype enctype)
-{
- switch(enctype) {
- case ENCTYPE_DES_CBC_CRC:
- case ENCTYPE_DES_CBC_MD4:
- case ENCTYPE_DES_CBC_MD5:
- case ENCTYPE_DES3_CBC_SHA1:
- case ENCTYPE_DES3_CBC_RAW:
- case ENCTYPE_ARCFOUR_HMAC:
- case ENCTYPE_ARCFOUR_HMAC_EXP :
- return 0;
- default:
- if (krb5_c_valid_enctype(enctype))
- return 1;
- else return 0;
- }
-}
-
static krb5_boolean
request_contains_enctype (krb5_context context, const krb5_kdc_req *request,
krb5_enctype enctype)
krb5_pa_data *
find_pa_data(krb5_pa_data **padata, krb5_preauthtype pa_type)
{
-return krb5int_find_pa_data(kdc_context, padata, pa_type);
+ return krb5int_find_pa_data(kdc_context, padata, pa_type);
}
krb5_error_code
}
/* make sure the client is of proper lineage (see above) */
- if (foreign_server && !find_pa_data(request->padata, KRB5_PADATA_FOR_USER)) {
+ if (foreign_server &&
+ !find_pa_data(request->padata, KRB5_PADATA_FOR_USER)) {
if (is_local_principal((*ticket)->enc_part2->client)) {
/* someone in a foreign realm claiming to be local */
krb5_klog_syslog(LOG_INFO, "PROCESS_TGS: failed lineage check");
* as a com_err error number!
*/
#define AS_INVALID_OPTIONS (KDC_OPT_FORWARDED | KDC_OPT_PROXY |\
-KDC_OPT_VALIDATE | KDC_OPT_RENEW | KDC_OPT_ENC_TKT_IN_SKEY)
+ KDC_OPT_VALIDATE | KDC_OPT_RENEW | \
+ KDC_OPT_ENC_TKT_IN_SKEY | KDC_OPT_CNAME_IN_ADDL_TKT)
int
validate_as_request(register krb5_kdc_req *request, krb5_db_entry client,
krb5_db_entry server, krb5_timestamp kdc_time,
* preauthentication data is absent in the request.
*
* Hence, this check most be done after the check for preauth
- * data, and is now performed by validate_forwardable().
+ * data, and is now performed by validate_forwardable() (the
+ * contents of which were previously below).
*/
-#if 0
- /* Client and server must allow forwardable tickets */
- if (isflagset(request->kdc_options, KDC_OPT_FORWARDABLE) &&
- (isflagset(client.attributes, KRB5_KDB_DISALLOW_FORWARDABLE) ||
- isflagset(server.attributes, KRB5_KDB_DISALLOW_FORWARDABLE))) {
- *status = "FORWARDABLE NOT ALLOWED";
- return(KDC_ERR_POLICY);
- }
-#endif
/* Client and server must allow renewable tickets */
if (isflagset(request->kdc_options, KDC_OPT_RENEWABLE) &&
}
static krb5_error_code
-verify_s4u2self_checksum(krb5_context context,
+verify_for_user_checksum(krb5_context context,
krb5_keyblock *key,
krb5_pa_for_user *req)
{
&valid);
if (code == 0 && valid == FALSE)
- code = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ code = KRB5KRB_AP_ERR_MODIFIED;
free(data.data);
}
/*
- * Protocol transition validation code based on AS-REQ
- * validation code
+ * Legacy protocol transition (Windows 2003 and above)
*/
-static int
-validate_s4u2self_request(krb5_kdc_req *request,
- const krb5_db_entry *client,
- krb5_timestamp kdc_time,
- const char **status)
+static krb5_error_code
+kdc_process_for_user(krb5_context context,
+ krb5_pa_data *pa_data,
+ krb5_keyblock *tgs_session,
+ krb5_pa_s4u_x509_user **s4u_x509_user,
+ const char **status)
{
- int errcode;
- krb5_db_entry server = { 0 };
-
- /* The client must not be expired */
- if (client->expiration && client->expiration < kdc_time) {
- *status = "CLIENT EXPIRED";
- return KDC_ERR_NAME_EXP;
+ krb5_error_code code;
+ krb5_pa_for_user *for_user;
+ krb5_data req_data;
+
+ req_data.length = pa_data->length;
+ req_data.data = (char *)pa_data->contents;
+
+ code = decode_krb5_pa_for_user(&req_data, &for_user);
+ if (code)
+ return code;
+
+ code = verify_for_user_checksum(context, tgs_session, for_user);
+ if (code) {
+ *status = "INVALID_S4U2SELF_CHECKSUM";
+ krb5_free_pa_for_user(kdc_context, for_user);
+ return code;
}
- /* The client's password must not be expired, unless the server is
- a KRB5_KDC_PWCHANGE_SERVICE. */
- if (client->pw_expiration && client->pw_expiration < kdc_time) {
- *status = "CLIENT KEY EXPIRED";
- return KDC_ERR_KEY_EXP;
+ *s4u_x509_user = calloc(1, sizeof(krb5_pa_s4u_x509_user));
+ if (*s4u_x509_user == NULL) {
+ krb5_free_pa_for_user(kdc_context, for_user);
+ return ENOMEM;
}
+ (*s4u_x509_user)->user_id.user = for_user->user;
+ for_user->user = NULL;
+ krb5_free_pa_for_user(context, for_user);
+
+ return 0;
+}
+
+static krb5_error_code
+verify_s4u_x509_user_checksum(krb5_context context,
+ krb5_keyblock *key,
+ krb5_data *req_data,
+ krb5_int32 kdc_req_nonce,
+ krb5_pa_s4u_x509_user *req)
+{
+ krb5_error_code code;
+ krb5_data scratch;
+ krb5_boolean valid = FALSE;
+
+ if (enctype_requires_etype_info_2(key->enctype) &&
+ !krb5_c_is_keyed_cksum(req->cksum.checksum_type))
+ return KRB5KRB_AP_ERR_INAPP_CKSUM;
+
+ if (req->user_id.nonce != kdc_req_nonce)
+ return KRB5KRB_AP_ERR_MODIFIED;
+
/*
- * If the client requires password changing, then return an
- * error; S4U2Self cannot be used to change a password.
+ * Verify checksum over the encoded userid. If that fails,
+ * re-encode, and verify that. This is similar to the
+ * behaviour in kdc_process_tgs_req().
*/
- if (isflagset(client->attributes, KRB5_KDB_REQUIRES_PWCHANGE)) {
- *status = "REQUIRED PWCHANGE";
- return KDC_ERR_KEY_EXP;
+ if (fetch_asn1_field((unsigned char *)req_data->data, 1, 0, &scratch) < 0)
+ return ASN1_PARSE_ERROR;
+
+ code = krb5_c_verify_checksum(context,
+ key,
+ KRB5_KEYUSAGE_PA_S4U_X509_USER_REQUEST,
+ &scratch,
+ &req->cksum,
+ &valid);
+ if (code != 0)
+ return code;
+
+ if (valid == FALSE) {
+ krb5_data *data;
+
+ code = encode_krb5_s4u_userid(&req->user_id, &data);
+ if (code != 0)
+ return code;
+
+ code = krb5_c_verify_checksum(context,
+ key,
+ KRB5_KEYUSAGE_PA_S4U_X509_USER_REQUEST,
+ data,
+ &req->cksum,
+ &valid);
+
+ krb5_free_data(context, data);
+
+ if (code != 0)
+ return code;
}
- /* Check to see if client is locked out */
- if (isflagset(client->attributes, KRB5_KDB_DISALLOW_ALL_TIX)) {
- *status = "CLIENT LOCKED OUT";
- return KDC_ERR_C_PRINCIPAL_UNKNOWN;
+ return valid ? 0 : KRB5KRB_AP_ERR_MODIFIED;
+}
+
+/*
+ * New protocol transition request (Windows 2008 and above)
+ */
+static krb5_error_code
+kdc_process_s4u_x509_user(krb5_context context,
+ krb5_kdc_req *request,
+ krb5_pa_data *pa_data,
+ krb5_keyblock *tgs_subkey,
+ krb5_keyblock *tgs_session,
+ krb5_pa_s4u_x509_user **s4u_x509_user,
+ const char **status)
+{
+ krb5_error_code code;
+ krb5_data req_data;
+
+ req_data.length = pa_data->length;
+ req_data.data = (char *)pa_data->contents;
+
+ code = decode_krb5_pa_s4u_x509_user(&req_data, s4u_x509_user);
+ if (code)
+ return code;
+
+ code = verify_s4u_x509_user_checksum(context,
+ tgs_subkey ? tgs_subkey :
+ tgs_session,
+ &req_data,
+ request->nonce, *s4u_x509_user);
+
+ if (code) {
+ *status = "INVALID_S4U2SELF_CHECKSUM";
+ krb5_free_pa_s4u_x509_user(context, *s4u_x509_user);
+ *s4u_x509_user = NULL;
+ return code;
}
+ if (krb5_princ_size(context, (*s4u_x509_user)->user_id.user) == 0 ||
+ (*s4u_x509_user)->user_id.subject_cert.length != 0) {
+ *status = "INVALID_S4U2SELF_REQUEST";
+ krb5_free_pa_s4u_x509_user(context, *s4u_x509_user);
+ *s4u_x509_user = NULL;
+ return KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN;
+ }
+
+ return 0;
+}
+
+krb5_error_code
+kdc_make_s4u2self_rep(krb5_context context,
+ krb5_keyblock *tgs_subkey,
+ krb5_keyblock *tgs_session,
+ krb5_pa_s4u_x509_user *req_s4u_user,
+ krb5_kdc_rep *reply,
+ krb5_enc_kdc_rep_part *reply_encpart)
+{
+ krb5_error_code code;
+ krb5_data *data = NULL;
+ krb5_pa_s4u_x509_user rep_s4u_user;
+ krb5_pa_data padata;
+ krb5_enctype enctype;
+ krb5_keyusage usage;
+
+ memset(&rep_s4u_user, 0, sizeof(rep_s4u_user));
+
+ rep_s4u_user.user_id.nonce = req_s4u_user->user_id.nonce;
+ rep_s4u_user.user_id.user = req_s4u_user->user_id.user;
+ rep_s4u_user.user_id.options =
+ req_s4u_user->user_id.options & KRB5_S4U_OPTS_USE_REPLY_KEY_USAGE;
+
+ code = encode_krb5_s4u_userid(&rep_s4u_user.user_id, &data);
+ if (code != 0)
+ goto cleanup;
+
+ if (req_s4u_user->user_id.options & KRB5_S4U_OPTS_USE_REPLY_KEY_USAGE)
+ usage = KRB5_KEYUSAGE_PA_S4U_X509_USER_REPLY;
+ else
+ usage = KRB5_KEYUSAGE_PA_S4U_X509_USER_REQUEST;
+
+ code = krb5_c_make_checksum(context, req_s4u_user->cksum.checksum_type,
+ tgs_subkey != NULL ? tgs_subkey : tgs_session,
+ usage, data,
+ &rep_s4u_user.cksum);
+ if (code != 0)
+ goto cleanup;
+
+ krb5_free_data(context, data);
+ data = NULL;
+
+ code = encode_krb5_pa_s4u_x509_user(&rep_s4u_user, &data);
+ if (code != 0)
+ goto cleanup;
+
+ padata.magic = KV5M_PA_DATA;
+ padata.pa_type = KRB5_PADATA_S4U_X509_USER;
+ padata.length = data->length;
+ padata.contents = (krb5_octet *)data->data;
+
+ code = add_pa_data_element(context, &padata, &reply->padata, FALSE);
+ if (code != 0)
+ goto cleanup;
+
+ free(data);
+ data = NULL;
+
+ if (tgs_subkey != NULL)
+ enctype = tgs_subkey->enctype;
+ else
+ enctype = tgs_session->enctype;
+
/*
- * Check against local policy
+ * Owing to a bug in Windows, unkeyed checksums were used for older
+ * enctypes, including rc4-hmac. A forthcoming workaround for this
+ * includes the checksum bytes in the encrypted padata.
*/
- errcode = against_local_policy_as(request, *client, server,
- kdc_time, status);
- if (errcode)
- return errcode;
+ if ((req_s4u_user->user_id.options & KRB5_S4U_OPTS_USE_REPLY_KEY_USAGE) &&
+ enctype_requires_etype_info_2(enctype) == FALSE) {
+ padata.length = req_s4u_user->cksum.length +
+ rep_s4u_user.cksum.length;
+ padata.contents = malloc(padata.length);
+ if (padata.contents == NULL) {
+ code = ENOMEM;
+ goto cleanup;
+ }
- return 0;
+ memcpy(padata.contents,
+ req_s4u_user->cksum.contents,
+ req_s4u_user->cksum.length);
+ memcpy(&padata.contents[req_s4u_user->cksum.length],
+ rep_s4u_user.cksum.contents,
+ rep_s4u_user.cksum.length);
+
+ code = add_pa_data_element(context,&padata,
+ &reply_encpart->enc_padata, FALSE);
+ if (code != 0)
+ goto cleanup;
+ }
+
+cleanup:
+ if (rep_s4u_user.cksum.contents != NULL)
+ krb5_free_checksum_contents(context, &rep_s4u_user.cksum);
+ krb5_free_data(context, data);
+
+ return code;
}
/*
krb5_kdc_req *request,
krb5_const_principal client_princ,
const krb5_db_entry *server,
- krb5_keyblock *subkey,
+ krb5_keyblock *tgs_subkey,
+ krb5_keyblock *tgs_session,
krb5_timestamp kdc_time,
- krb5_pa_for_user **for_user,
+ krb5_pa_s4u_x509_user **s4u_x509_user,
krb5_db_entry *princ,
int *nprincs,
const char **status)
{
krb5_error_code code;
- krb5_pa_data **pa_data;
- krb5_data req_data;
+ krb5_pa_data *pa_data;
krb5_boolean more;
+ int flags;
*nprincs = 0;
memset(princ, 0, sizeof(*princ));
- if (request->padata == NULL) {
- return 0;
- }
-
- for (pa_data = request->padata; *pa_data != NULL; pa_data++) {
- if ((*pa_data)->pa_type == KRB5_PADATA_FOR_USER)
- break;
- }
- if (*pa_data == NULL) {
- return 0;
+ pa_data = find_pa_data(request->padata, KRB5_PADATA_S4U_X509_USER);
+ if (pa_data != NULL) {
+ code = kdc_process_s4u_x509_user(context,
+ request,
+ pa_data,
+ tgs_subkey,
+ tgs_session,
+ s4u_x509_user,
+ status);
+ if (code != 0)
+ return code;
+ } else {
+ pa_data = find_pa_data(request->padata, KRB5_PADATA_FOR_USER);
+ if (pa_data != NULL) {
+ code = kdc_process_for_user(context,
+ pa_data,
+ tgs_session,
+ s4u_x509_user,
+ status);
+ if (code != 0)
+ return code;
+ } else
+ return 0;
}
-#if 0
/*
- * Ignore request if the server principal is a TGS, not so much
- * to avoid unconstrained tickets being issued (as that would
- * require knowing the TGS key anyway) but so that we do not
- * block the server referral path.
+ * We need to compare the client name in the TGT with the requested
+ * server name. Supporting server name aliases without assuming a
+ * global name service makes this difficult to do.
+ *
+ * The comparison below handles the following cases (note that the
+ * term "principal name" below excludes the realm).
+ *
+ * (1) The requested service is a host-based service with two name
+ * components, in which case we assume the principal name to
+ * contain sufficient qualifying information. The realm is
+ * ignored for the purpose of comparison.
+ *
+ * (2) The requested service name is an enterprise principal name:
+ * the service principal name is compared with the unparsed
+ * form of the client name (including its realm).
+ *
+ * (3) The requested service is some other name type: an exact
+ * match is required.
+ *
+ * An alternative would be to look up the server once again with
+ * FLAG_CANONICALIZE | FLAG_CLIENT_REFERRALS_ONLY set, do an exact
+ * match between the returned name and client_princ. However, this
+ * assumes that the client set FLAG_CANONICALIZE when requesting
+ * the TGT and that we have a global name service.
*/
- if (krb5_is_tgs_principal(server->princ)) {
- return 0;
- }
-#endif
-
- *status = "PROCESS_S4U2SELF_REQUEST";
-
- req_data.length = (*pa_data)->length;
- req_data.data = (char *)(*pa_data)->contents;
-
- code = decode_krb5_pa_for_user(&req_data, for_user);
- if (code) {
- return code;
- }
-
- if (krb5_princ_type(context, (*for_user)->user) !=
- KRB5_NT_ENTERPRISE_PRINCIPAL) {
- *status = "INVALID_S4U2SELF_REQUEST";
- return KRB5KDC_ERR_POLICY;
+ flags = 0;
+ switch (krb5_princ_type(kdc_context, request->server)) {
+ case KRB5_NT_SRV_HST: /* (1) */
+ if (krb5_princ_size(kdc_context, request->server) == 2)
+ flags |= KRB5_PRINCIPAL_COMPARE_IGNORE_REALM;
+ break;
+ case KRB5_NT_ENTERPRISE_PRINCIPAL: /* (2) */
+ flags |= KRB5_PRINCIPAL_COMPARE_ENTERPRISE;
+ break;
+ default: /* (3) */
+ break;
}
- code = verify_s4u2self_checksum(context, subkey, *for_user);
- if (code) {
- *status = "INVALID_S4U2SELF_CHECKSUM";
- krb5_free_pa_for_user(kdc_context, *for_user);
- *for_user = NULL;
- return code;
- }
- if (!krb5_principal_compare_flags(context, request->server, client_princ,
- KRB5_PRINCIPAL_COMPARE_ENTERPRISE)) {
+ if (!krb5_principal_compare_flags(context,
+ request->server,
+ client_princ,
+ flags)) {
*status = "INVALID_S4U2SELF_REQUEST";
- return KRB5KDC_ERR_POLICY;
+ return KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN; /* match Windows error code */
}
/*
* Protocol transition is mutually exclusive with renew/forward/etc
- * as well as user-to-user and constrained delegation.
+ * as well as user-to-user and constrained delegation. This check
+ * is also made in validate_as_request().
*
* We can assert from this check that the header ticket was a TGT, as
* that is validated previously in validate_tgs_request().
*/
- if (request->kdc_options & (NO_TGT_OPTION | KDC_OPT_ENC_TKT_IN_SKEY | KDC_OPT_CNAME_IN_ADDL_TKT)) {
+ if (request->kdc_options & AS_INVALID_OPTIONS) {
+ *status = "INVALID AS OPTIONS";
return KRB5KDC_ERR_BADOPTION;
}
/*
* Do not attempt to lookup principals in foreign realms.
*/
- if (is_local_principal((*for_user)->user)) {
+ if (is_local_principal((*s4u_x509_user)->user_id.user)) {
+ krb5_db_entry no_server;
+
*nprincs = 1;
code = krb5_db_get_principal_ext(kdc_context,
- (*for_user)->user,
+ (*s4u_x509_user)->user_id.user,
KRB5_KDB_FLAG_INCLUDE_PAC,
princ, nprincs, &more);
if (code) {
return KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN;
}
- code = validate_s4u2self_request(request, princ, kdc_time, status);
+ memset(&no_server, 0, sizeof(no_server));
+
+ code = validate_as_request(request, *princ,
+ no_server, kdc_time, status);
if (code) {
return code;
}
}
- *status = NULL;
-
return 0;
}
/* Must be in same realm */
if (!krb5_realm_compare(context, server->princ, proxy)) {
- return KRB5KDC_ERR_BADOPTION;
+ return KRB5KDC_ERR_POLICY;
}
req.server = server;
/* OpenSolaris: audit_krb5kdc_tgs_req_alt_tgt(...) */
}
+krb5_boolean
+enctype_requires_etype_info_2(krb5_enctype enctype)
+{
+ switch(enctype) {
+ case ENCTYPE_DES_CBC_CRC:
+ case ENCTYPE_DES_CBC_MD4:
+ case ENCTYPE_DES_CBC_MD5:
+ case ENCTYPE_DES3_CBC_SHA1:
+ case ENCTYPE_DES3_CBC_RAW:
+ case ENCTYPE_ARCFOUR_HMAC:
+ case ENCTYPE_ARCFOUR_HMAC_EXP :
+ return 0;
+ default:
+ return krb5_c_valid_enctype(enctype);
+ }
+}
+
+/* XXX where are the generic helper routines for this? */
+krb5_error_code
+add_pa_data_element(krb5_context context,
+ krb5_pa_data *padata,
+ krb5_pa_data ***inout_padata,
+ krb5_boolean copy)
+{
+ int i;
+ krb5_pa_data **p;
+
+ if (*inout_padata != NULL) {
+ for (i = 0; (*inout_padata)[i] != NULL; i++)
+ ;
+ } else
+ i = 0;
+
+ p = realloc(*inout_padata, (i + 2) * sizeof(krb5_pa_data *));
+ if (p == NULL)
+ return ENOMEM;
+
+ *inout_padata = p;
+
+ p[i] = (krb5_pa_data *)malloc(sizeof(krb5_pa_data));
+ if (p[i] == NULL)
+ return ENOMEM;
+ *(p[i]) = *padata;
+
+ p[i + 1] = NULL;
+
+ if (copy) {
+ p[i]->contents = (krb5_octet *)malloc(padata->length);
+ if (p[i]->contents == NULL) {
+ free(p[i]);
+ p[i] = NULL;
+ return ENOMEM;
+ }
+
+ memcpy(p[i]->contents, padata->contents, padata->length);
+ }
+
+ return 0;
+}
+
krb5_ticket *, const char **);
/* kdc_preauth.c */
+krb5_boolean enctype_requires_etype_info_2(krb5_enctype enctype);
+
const char * missing_required_preauth
(krb5_db_entry *client, krb5_db_entry *server,
krb5_enc_tkt_part *enc_tkt_reply);
krb5_pa_data *find_pa_data
(krb5_pa_data **padata, krb5_preauthtype pa_type);
+krb5_error_code add_pa_data_element
+ (krb5_context context,
+ krb5_pa_data *padata,
+ krb5_pa_data ***out_padata,
+ krb5_boolean copy);
+
/* kdc_authdata.c */
krb5_error_code load_authdata_plugins(krb5_context context);
krb5_error_code unload_authdata_plugins(krb5_context context);
krb5_kdc_req *request,
krb5_const_principal client_princ,
const krb5_db_entry *server,
- krb5_keyblock *subkey,
+ krb5_keyblock *tgs_subkey,
+ krb5_keyblock *tgs_session,
krb5_timestamp kdc_time,
- krb5_pa_for_user **s4u2_req,
+ krb5_pa_s4u_x509_user **s4u2self_req,
krb5_db_entry *princ,
int *nprincs,
const char **status);
+krb5_error_code kdc_make_s4u2self_rep
+ (krb5_context context,
+ krb5_keyblock *tgs_subkey,
+ krb5_keyblock *tgs_session,
+ krb5_pa_s4u_x509_user *req_s4u_user,
+ krb5_kdc_rep *reply,
+ krb5_enc_kdc_rep_part *reply_encpart);
+
krb5_error_code kdc_process_s4u2proxy_req
(krb5_context context,
krb5_kdc_req *request,
--- /dev/null
+thisconfigdir=../../../..
+myfulldir=lib/crypto/krb/enc_provider
+mydir=lib/crypto/krb/enc_provider
+BUILDTOP=$(REL)..$(S)..$(S)..$(S)..
+LOCALINCLUDES = -I$(srcdir)/../../@CRYPTO_IMPL@/des -I$(srcdir)/../../@CRYPTO_IMPL@/arcfour \
+ -I$(srcdir)/../../@CRYPTO_IMPL@/aes -I$(srcdir)/.. -I$(srcdir)/../../@CRYPTO_IMPL@
+DEFS=
+
+##DOS##BUILDTOP = ..\..\..\..
+##DOS##PREFIXDIR=enc_provider
+##DOS##OBJFILE=..\$(OUTPRE)enc_prov.lst
+
+PROG_LIBPATH=-L$(TOPLIBD)
+PROG_RPATH=$(KRB5_LIBDIR)
+
+STLIBOBJS= des.o des3.o rc4.o aes.o
+
+OBJS= \
+ $(OUTPRE)des.$(OBJEXT) \
+ $(OUTPRE)des3.$(OBJEXT) \
+ $(OUTPRE)aes.$(OBJEXT) \
+ $(OUTPRE)rc4.$(OBJEXT)
+
+SRCS= \
+ $(srcdir)/des.c \
+ $(srcdir)/des3.c \
+ $(srcdir)/aes.c \
+ $(srcdir)/rc4.c
+
+##DOS##LIBOBJS = $(OBJS)
+
+all-unix:: all-libobjs
+
+includes:: depend
+
+depend:: $(SRCS)
+
+clean-unix:: clean-libobjs
+
+@libobj_frag@
+
--- /dev/null
+/*
+ * lib/crypto/enc_provider/aes.c
+ *
+ * Copyright (C) 2003, 2007, 2008 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#include "k5-int.h"
+#include "enc_provider.h"
+#include "aes.h"
+#include "../aead.h"
+
+#if 0
+aes_rval aes_blk_len(unsigned int blen, aes_ctx cx[1]);
+aes_rval aes_enc_key(const unsigned char in_key[], unsigned int klen, aes_ctx cx[1]);
+aes_rval aes_enc_blk(const unsigned char in_blk[], unsigned char out_blk[], const aes_ctx cx[1]);
+aes_rval aes_dec_key(const unsigned char in_key[], unsigned int klen, aes_ctx cx[1]);
+aes_rval aes_dec_blk(const unsigned char in_blk[], unsigned char out_blk[], const aes_ctx cx[1]);
+#endif
+
+#define CHECK_SIZES 0
+
+#if 0
+static void printd (const char *descr, krb5_data *d) {
+ int i, j;
+ const int r = 16;
+
+ printf("%s:", descr);
+
+ for (i = 0; i < d->length; i += r) {
+ printf("\n %04x: ", i);
+ for (j = i; j < i + r && j < d->length; j++)
+ printf(" %02x", 0xff & d->data[j]);
+#ifdef SHOW_TEXT
+ for (; j < i + r; j++)
+ printf(" ");
+ printf(" ");
+ for (j = i; j < i + r && j < d->length; j++) {
+ int c = 0xff & d->data[j];
+ printf("%c", isprint(c) ? c : '.');
+ }
+#endif
+ }
+ printf("\n");
+}
+#endif
+
+static inline void enc(char *out, const char *in, aes_ctx *ctx)
+{
+ if (aes_enc_blk((const unsigned char *)in, (unsigned char *)out, ctx)
+ != aes_good)
+ abort();
+}
+static inline void dec(char *out, const char *in, aes_ctx *ctx)
+{
+ if (aes_dec_blk((const unsigned char *)in, (unsigned char *)out, ctx)
+ != aes_good)
+ abort();
+}
+
+static void xorblock(char *out, const char *in)
+{
+ int z;
+ for (z = 0; z < BLOCK_SIZE; z++)
+ out[z] ^= in[z];
+}
+
+krb5_error_code
+krb5int_aes_encrypt(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_data *input, krb5_data *output)
+{
+ aes_ctx ctx;
+ char tmp[BLOCK_SIZE], tmp2[BLOCK_SIZE], tmp3[BLOCK_SIZE];
+ int nblocks = 0, blockno;
+
+/* CHECK_SIZES; */
+
+ if (aes_enc_key(key->contents, key->length, &ctx) != aes_good)
+ abort();
+
+ if (ivec)
+ memcpy(tmp, ivec->data, BLOCK_SIZE);
+ else
+ memset(tmp, 0, BLOCK_SIZE);
+
+ nblocks = (input->length + BLOCK_SIZE - 1) / BLOCK_SIZE;
+
+ if (nblocks == 1) {
+ /* XXX Used for DK function. */
+ enc(output->data, input->data, &ctx);
+ } else {
+ unsigned int nleft;
+
+ for (blockno = 0; blockno < nblocks - 2; blockno++) {
+ xorblock(tmp, input->data + blockno * BLOCK_SIZE);
+ enc(tmp2, tmp, &ctx);
+ memcpy(output->data + blockno * BLOCK_SIZE, tmp2, BLOCK_SIZE);
+
+ /* Set up for next block. */
+ memcpy(tmp, tmp2, BLOCK_SIZE);
+ }
+ /* Do final CTS step for last two blocks (the second of which
+ may or may not be incomplete). */
+ xorblock(tmp, input->data + (nblocks - 2) * BLOCK_SIZE);
+ enc(tmp2, tmp, &ctx);
+ nleft = input->length - (nblocks - 1) * BLOCK_SIZE;
+ memcpy(output->data + (nblocks - 1) * BLOCK_SIZE, tmp2, nleft);
+ memcpy(tmp, tmp2, BLOCK_SIZE);
+
+ memset(tmp3, 0, sizeof(tmp3));
+ memcpy(tmp3, input->data + (nblocks - 1) * BLOCK_SIZE, nleft);
+ xorblock(tmp, tmp3);
+ enc(tmp2, tmp, &ctx);
+ memcpy(output->data + (nblocks - 2) * BLOCK_SIZE, tmp2, BLOCK_SIZE);
+ if (ivec)
+ memcpy(ivec->data, tmp2, BLOCK_SIZE);
+ }
+
+ return 0;
+}
+
+krb5_error_code
+krb5int_aes_decrypt(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_data *input, krb5_data *output)
+{
+ aes_ctx ctx;
+ char tmp[BLOCK_SIZE], tmp2[BLOCK_SIZE], tmp3[BLOCK_SIZE];
+ int nblocks = 0, blockno;
+
+ CHECK_SIZES;
+
+ if (aes_dec_key(key->contents, key->length, &ctx) != aes_good)
+ abort();
+
+ if (ivec)
+ memcpy(tmp, ivec->data, BLOCK_SIZE);
+ else
+ memset(tmp, 0, BLOCK_SIZE);
+
+ nblocks = (input->length + BLOCK_SIZE - 1) / BLOCK_SIZE;
+
+ if (nblocks == 1) {
+ if (input->length < BLOCK_SIZE)
+ abort();
+ dec(output->data, input->data, &ctx);
+ } else {
+
+ for (blockno = 0; blockno < nblocks - 2; blockno++) {
+ dec(tmp2, input->data + blockno * BLOCK_SIZE, &ctx);
+ xorblock(tmp2, tmp);
+ memcpy(output->data + blockno * BLOCK_SIZE, tmp2, BLOCK_SIZE);
+ memcpy(tmp, input->data + blockno * BLOCK_SIZE, BLOCK_SIZE);
+ }
+ /* Do last two blocks, the second of which (next-to-last block
+ of plaintext) may be incomplete. */
+ dec(tmp2, input->data + (nblocks - 2) * BLOCK_SIZE, &ctx);
+ /* Set tmp3 to last ciphertext block, padded. */
+ memset(tmp3, 0, sizeof(tmp3));
+ memcpy(tmp3, input->data + (nblocks - 1) * BLOCK_SIZE,
+ input->length - (nblocks - 1) * BLOCK_SIZE);
+ /* Set tmp2 to last (possibly partial) plaintext block, and
+ save it. */
+ xorblock(tmp2, tmp3);
+ memcpy(output->data + (nblocks - 1) * BLOCK_SIZE, tmp2,
+ input->length - (nblocks - 1) * BLOCK_SIZE);
+ /* Maybe keep the trailing part, and copy in the last
+ ciphertext block. */
+ memcpy(tmp2, tmp3, input->length - (nblocks - 1) * BLOCK_SIZE);
+ /* Decrypt, to get next to last plaintext block xor previous
+ ciphertext. */
+ dec(tmp3, tmp2, &ctx);
+ xorblock(tmp3, tmp);
+ memcpy(output->data + (nblocks - 2) * BLOCK_SIZE, tmp3, BLOCK_SIZE);
+ if (ivec)
+ memcpy(ivec->data, input->data + (nblocks - 2) * BLOCK_SIZE,
+ BLOCK_SIZE);
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+krb5int_aes_encrypt_iov(const krb5_keyblock *key,
+ const krb5_data *ivec,
+ krb5_crypto_iov *data,
+ size_t num_data)
+{
+ aes_ctx ctx;
+ char tmp[BLOCK_SIZE], tmp2[BLOCK_SIZE];
+ int nblocks = 0, blockno;
+ size_t input_length, i;
+
+ if (aes_enc_key(key->contents, key->length, &ctx) != aes_good)
+ abort();
+
+ if (ivec != NULL)
+ memcpy(tmp, ivec->data, BLOCK_SIZE);
+ else
+ memset(tmp, 0, BLOCK_SIZE);
+
+ for (i = 0, input_length = 0; i < num_data; i++) {
+ krb5_crypto_iov *iov = &data[i];
+
+ if (ENCRYPT_IOV(iov))
+ input_length += iov->data.length;
+ }
+
+ nblocks = (input_length + BLOCK_SIZE - 1) / BLOCK_SIZE;
+
+ assert(nblocks > 1);
+
+ {
+ char blockN2[BLOCK_SIZE]; /* second last */
+ char blockN1[BLOCK_SIZE]; /* last block */
+ struct iov_block_state input_pos, output_pos;
+
+ IOV_BLOCK_STATE_INIT(&input_pos);
+ IOV_BLOCK_STATE_INIT(&output_pos);
+
+ for (blockno = 0; blockno < nblocks - 2; blockno++) {
+ char blockN[BLOCK_SIZE];
+
+ krb5int_c_iov_get_block((unsigned char *)blockN, BLOCK_SIZE, data, num_data, &input_pos);
+ xorblock(tmp, blockN);
+ enc(tmp2, tmp, &ctx);
+ krb5int_c_iov_put_block(data, num_data, (unsigned char *)tmp2, BLOCK_SIZE, &output_pos);
+
+ /* Set up for next block. */
+ memcpy(tmp, tmp2, BLOCK_SIZE);
+ }
+
+ /* Do final CTS step for last two blocks (the second of which
+ may or may not be incomplete). */
+
+ /* First, get the last two blocks */
+ memset(blockN1, 0, sizeof(blockN1)); /* pad last block with zeros */
+ krb5int_c_iov_get_block((unsigned char *)blockN2, BLOCK_SIZE, data, num_data, &input_pos);
+ krb5int_c_iov_get_block((unsigned char *)blockN1, BLOCK_SIZE, data, num_data, &input_pos);
+
+ /* Encrypt second last block */
+ xorblock(tmp, blockN2);
+ enc(tmp2, tmp, &ctx);
+ memcpy(blockN2, tmp2, BLOCK_SIZE); /* blockN2 now contains first block */
+ memcpy(tmp, tmp2, BLOCK_SIZE);
+
+ /* Encrypt last block */
+ xorblock(tmp, blockN1);
+ enc(tmp2, tmp, &ctx);
+ memcpy(blockN1, tmp2, BLOCK_SIZE);
+
+ /* Put the last two blocks back into the iovec (reverse order) */
+ krb5int_c_iov_put_block(data, num_data, (unsigned char *)blockN1, BLOCK_SIZE, &output_pos);
+ krb5int_c_iov_put_block(data, num_data, (unsigned char *)blockN2, BLOCK_SIZE, &output_pos);
+
+ if (ivec != NULL)
+ memcpy(ivec->data, blockN1, BLOCK_SIZE);
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+krb5int_aes_decrypt_iov(const krb5_keyblock *key,
+ const krb5_data *ivec,
+ krb5_crypto_iov *data,
+ size_t num_data)
+{
+ aes_ctx ctx;
+ char tmp[BLOCK_SIZE], tmp2[BLOCK_SIZE], tmp3[BLOCK_SIZE];
+ int nblocks = 0, blockno;
+ unsigned int i;
+ size_t input_length;
+
+ CHECK_SIZES;
+
+ if (aes_dec_key(key->contents, key->length, &ctx) != aes_good)
+ abort();
+
+ if (ivec != NULL)
+ memcpy(tmp, ivec->data, BLOCK_SIZE);
+ else
+ memset(tmp, 0, BLOCK_SIZE);
+
+ for (i = 0, input_length = 0; i < num_data; i++) {
+ krb5_crypto_iov *iov = &data[i];
+
+ if (ENCRYPT_IOV(iov))
+ input_length += iov->data.length;
+ }
+
+ nblocks = (input_length + BLOCK_SIZE - 1) / BLOCK_SIZE;
+
+ assert(nblocks > 1);
+
+ {
+ char blockN2[BLOCK_SIZE]; /* second last */
+ char blockN1[BLOCK_SIZE]; /* last block */
+ struct iov_block_state input_pos, output_pos;
+
+ IOV_BLOCK_STATE_INIT(&input_pos);
+ IOV_BLOCK_STATE_INIT(&output_pos);
+
+ for (blockno = 0; blockno < nblocks - 2; blockno++) {
+ char blockN[BLOCK_SIZE];
+
+ krb5int_c_iov_get_block((unsigned char *)blockN, BLOCK_SIZE, data, num_data, &input_pos);
+ dec(tmp2, blockN, &ctx);
+ xorblock(tmp2, tmp);
+ krb5int_c_iov_put_block(data, num_data, (unsigned char *)tmp2, BLOCK_SIZE, &output_pos);
+ memcpy(tmp, blockN, BLOCK_SIZE);
+ }
+
+ /* Do last two blocks, the second of which (next-to-last block
+ of plaintext) may be incomplete. */
+
+ /* First, get the last two encrypted blocks */
+ memset(blockN1, 0, sizeof(blockN1)); /* pad last block with zeros */
+ krb5int_c_iov_get_block((unsigned char *)blockN2, BLOCK_SIZE, data, num_data, &input_pos);
+ krb5int_c_iov_get_block((unsigned char *)blockN1, BLOCK_SIZE, data, num_data, &input_pos);
+
+ /* Decrypt second last block */
+ dec(tmp2, blockN2, &ctx);
+ /* Set tmp2 to last (possibly partial) plaintext block, and
+ save it. */
+ xorblock(tmp2, blockN1);
+ memcpy(blockN2, tmp2, BLOCK_SIZE);
+
+ /* Maybe keep the trailing part, and copy in the last
+ ciphertext block. */
+ input_length %= BLOCK_SIZE;
+ memcpy(tmp2, blockN1, input_length ? input_length : BLOCK_SIZE);
+ dec(tmp3, tmp2, &ctx);
+ xorblock(tmp3, tmp);
+ /* Copy out ivec first before we clobber blockN1 with plaintext */
+ if (ivec != NULL)
+ memcpy(ivec->data, blockN1, BLOCK_SIZE);
+ memcpy(blockN1, tmp3, BLOCK_SIZE);
+
+ /* Put the last two blocks back into the iovec */
+ krb5int_c_iov_put_block(data, num_data, (unsigned char *)blockN1, BLOCK_SIZE, &output_pos);
+ krb5int_c_iov_put_block(data, num_data, (unsigned char *)blockN2, BLOCK_SIZE, &output_pos);
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+k5_aes_make_key(const krb5_data *randombits, krb5_keyblock *key)
+{
+ if (key->length != 16 && key->length != 32)
+ return(KRB5_BAD_KEYSIZE);
+ if (randombits->length != key->length)
+ return(KRB5_CRYPTO_INTERNAL);
+
+ key->magic = KV5M_KEYBLOCK;
+
+ memcpy(key->contents, randombits->data, randombits->length);
+ return(0);
+}
+
+static krb5_error_code
+krb5int_aes_init_state (const krb5_keyblock *key, krb5_keyusage usage,
+ krb5_data *state)
+{
+ state->length = 16;
+ state->data = (void *) malloc(16);
+ if (state->data == NULL)
+ return ENOMEM;
+ memset(state->data, 0, state->length);
+ return 0;
+}
+
+const struct krb5_enc_provider krb5int_enc_aes128 = {
+ 16,
+ 16, 16,
+ krb5int_aes_encrypt,
+ krb5int_aes_decrypt,
+ k5_aes_make_key,
+ krb5int_aes_init_state,
+ krb5int_default_free_state,
+ krb5int_aes_encrypt_iov,
+ krb5int_aes_decrypt_iov
+};
+
+const struct krb5_enc_provider krb5int_enc_aes256 = {
+ 16,
+ 32, 32,
+ krb5int_aes_encrypt,
+ krb5int_aes_decrypt,
+ k5_aes_make_key,
+ krb5int_aes_init_state,
+ krb5int_default_free_state,
+ krb5int_aes_encrypt_iov,
+ krb5int_aes_decrypt_iov
+};
+
--- /dev/null
+#
+# Generated makefile dependencies follow.
+#
+des.so des.po $(OUTPRE)des.$(OBJEXT): $(BUILDTOP)/include/autoconf.h \
+ $(BUILDTOP)/include/krb5/krb5.h $(BUILDTOP)/include/osconf.h \
+ $(BUILDTOP)/include/profile.h $(COM_ERR_DEPS) $(SRCTOP)/include/k5-buf.h \
+ $(SRCTOP)/include/k5-err.h $(SRCTOP)/include/k5-gmt_mktime.h \
+ $(SRCTOP)/include/k5-int-pkinit.h $(SRCTOP)/include/k5-int.h \
+ $(SRCTOP)/include/k5-platform.h $(SRCTOP)/include/k5-plugin.h \
+ $(SRCTOP)/include/k5-thread.h $(SRCTOP)/include/krb5.h \
+ $(SRCTOP)/include/krb5/locate_plugin.h $(SRCTOP)/include/krb5/preauth_plugin.h \
+ $(SRCTOP)/include/port-sockets.h $(SRCTOP)/include/socket-utils.h \
+ $(srcdir)/../../builtin/des/des_int.h $(srcdir)/../aead.h \
+ $(srcdir)/../cksumtypes.h des.c enc_provider.h
+des3.so des3.po $(OUTPRE)des3.$(OBJEXT): $(BUILDTOP)/include/autoconf.h \
+ $(BUILDTOP)/include/krb5/krb5.h $(BUILDTOP)/include/osconf.h \
+ $(BUILDTOP)/include/profile.h $(COM_ERR_DEPS) $(SRCTOP)/include/k5-buf.h \
+ $(SRCTOP)/include/k5-err.h $(SRCTOP)/include/k5-gmt_mktime.h \
+ $(SRCTOP)/include/k5-int-pkinit.h $(SRCTOP)/include/k5-int.h \
+ $(SRCTOP)/include/k5-platform.h $(SRCTOP)/include/k5-plugin.h \
+ $(SRCTOP)/include/k5-thread.h $(SRCTOP)/include/krb5.h \
+ $(SRCTOP)/include/krb5/locate_plugin.h $(SRCTOP)/include/krb5/preauth_plugin.h \
+ $(SRCTOP)/include/port-sockets.h $(SRCTOP)/include/socket-utils.h \
+ $(srcdir)/../../builtin/des/des_int.h $(srcdir)/../aead.h \
+ $(srcdir)/../cksumtypes.h des3.c
+aes.so aes.po $(OUTPRE)aes.$(OBJEXT): $(BUILDTOP)/include/autoconf.h \
+ $(BUILDTOP)/include/krb5/krb5.h $(BUILDTOP)/include/osconf.h \
+ $(BUILDTOP)/include/profile.h $(COM_ERR_DEPS) $(SRCTOP)/include/k5-buf.h \
+ $(SRCTOP)/include/k5-err.h $(SRCTOP)/include/k5-gmt_mktime.h \
+ $(SRCTOP)/include/k5-int-pkinit.h $(SRCTOP)/include/k5-int.h \
+ $(SRCTOP)/include/k5-platform.h $(SRCTOP)/include/k5-plugin.h \
+ $(SRCTOP)/include/k5-thread.h $(SRCTOP)/include/krb5.h \
+ $(SRCTOP)/include/krb5/locate_plugin.h $(SRCTOP)/include/krb5/preauth_plugin.h \
+ $(SRCTOP)/include/port-sockets.h $(SRCTOP)/include/socket-utils.h \
+ $(srcdir)/../../builtin/aes/aes.h $(srcdir)/../../builtin/aes/uitypes.h \
+ $(srcdir)/../aead.h $(srcdir)/../cksumtypes.h aes.c \
+ enc_provider.h
+rc4.so rc4.po $(OUTPRE)rc4.$(OBJEXT): $(BUILDTOP)/include/autoconf.h \
+ $(BUILDTOP)/include/krb5/krb5.h $(BUILDTOP)/include/osconf.h \
+ $(BUILDTOP)/include/profile.h $(COM_ERR_DEPS) $(SRCTOP)/include/k5-buf.h \
+ $(SRCTOP)/include/k5-err.h $(SRCTOP)/include/k5-gmt_mktime.h \
+ $(SRCTOP)/include/k5-int-pkinit.h $(SRCTOP)/include/k5-int.h \
+ $(SRCTOP)/include/k5-platform.h $(SRCTOP)/include/k5-plugin.h \
+ $(SRCTOP)/include/k5-thread.h $(SRCTOP)/include/krb5.h \
+ $(SRCTOP)/include/krb5/locate_plugin.h $(SRCTOP)/include/krb5/preauth_plugin.h \
+ $(SRCTOP)/include/port-sockets.h $(SRCTOP)/include/socket-utils.h \
+ $(srcdir)/../../builtin/arcfour/arcfour-int.h $(srcdir)/../../builtin/arcfour/arcfour.h \
+ $(srcdir)/../aead.h $(srcdir)/../cksumtypes.h enc_provider.h \
+ rc4.c
--- /dev/null
+/*
+ * Copyright (C) 1998 by the FundsXpress, INC.
+ *
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may require
+ * a specific license from the United States Government. It is the
+ * responsibility of any person or organization contemplating export to
+ * obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of FundsXpress. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. FundsXpress makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "k5-int.h"
+#include "des_int.h"
+#include "enc_provider.h"
+#include "aead.h"
+
+static krb5_error_code
+k5_des_docrypt(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_data *input, krb5_data *output, int enc)
+{
+ mit_des_key_schedule schedule;
+
+ /* key->enctype was checked by the caller */
+
+ if (key->length != 8)
+ return(KRB5_BAD_KEYSIZE);
+ if ((input->length%8) != 0)
+ return(KRB5_BAD_MSIZE);
+ if (ivec && (ivec->length != 8))
+ return(KRB5_BAD_MSIZE);
+ if (input->length != output->length)
+ return(KRB5_BAD_MSIZE);
+
+ switch (mit_des_key_sched(key->contents, schedule)) {
+ case -1:
+ return(KRB5DES_BAD_KEYPAR);
+ case -2:
+ return(KRB5DES_WEAK_KEY);
+ }
+
+ /* this has a return value, but the code always returns zero */
+
+ mit_des_cbc_encrypt((krb5_pointer) input->data,
+ (krb5_pointer) output->data, input->length,
+ schedule,
+ (ivec
+ ? (const unsigned char *) ivec->data
+ : (const unsigned char *) mit_des_zeroblock),
+ enc);
+
+ memset(schedule, 0, sizeof(schedule));
+
+ return(0);
+}
+
+static krb5_error_code
+k5_des_encrypt(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_data *input, krb5_data *output)
+{
+ return(k5_des_docrypt(key, ivec, input, output, 1));
+}
+
+static krb5_error_code
+k5_des_decrypt(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_data *input, krb5_data *output)
+{
+ return(k5_des_docrypt(key, ivec, input, output, 0));
+}
+
+static krb5_error_code
+k5_des_make_key(const krb5_data *randombits, krb5_keyblock *key)
+{
+ if (key->length != 8)
+ return(KRB5_BAD_KEYSIZE);
+ if (randombits->length != 7)
+ return(KRB5_CRYPTO_INTERNAL);
+
+ key->magic = KV5M_KEYBLOCK;
+ key->length = 8;
+
+ /* take the seven bytes, move them around into the top 7 bits of the
+ 8 key bytes, then compute the parity bits */
+
+ memcpy(key->contents, randombits->data, randombits->length);
+ key->contents[7] = (((key->contents[0]&1)<<1) | ((key->contents[1]&1)<<2) |
+ ((key->contents[2]&1)<<3) | ((key->contents[3]&1)<<4) |
+ ((key->contents[4]&1)<<5) | ((key->contents[5]&1)<<6) |
+ ((key->contents[6]&1)<<7));
+
+ mit_des_fixup_key_parity(key->contents);
+
+ return(0);
+}
+
+static krb5_error_code
+k5_des_docrypt_iov(const krb5_keyblock *key, const krb5_data *ivec,
+ krb5_crypto_iov *data, size_t num_data, int enc)
+{
+ mit_des_key_schedule schedule;
+ size_t input_length = 0;
+ unsigned int i;
+
+ /* key->enctype was checked by the caller */
+
+ if (key->length != 8)
+ return(KRB5_BAD_KEYSIZE);
+
+ for (i = 0; i < num_data; i++) {
+ const krb5_crypto_iov *iov = &data[i];
+
+ if (ENCRYPT_DATA_IOV(iov))
+ input_length += iov->data.length;
+ }
+
+ if ((input_length % 8) != 0)
+ return(KRB5_BAD_MSIZE);
+ if (ivec && (ivec->length != 8))
+ return(KRB5_BAD_MSIZE);
+
+ switch (mit_des_key_sched(key->contents, schedule)) {
+ case -1:
+ return(KRB5DES_BAD_KEYPAR);
+ case -2:
+ return(KRB5DES_WEAK_KEY);
+ }
+
+ /* this has a return value, but the code always returns zero */
+ if (enc)
+ krb5int_des_cbc_encrypt_iov(data, num_data, schedule, ivec ? ivec->data : NULL);
+ else
+ krb5int_des_cbc_decrypt_iov(data, num_data, schedule, ivec ? ivec->data : NULL);
+
+ memset(schedule, 0, sizeof(schedule));
+
+ return(0);
+}
+
+static krb5_error_code
+k5_des_encrypt_iov(const krb5_keyblock *key,
+ const krb5_data *ivec,
+ krb5_crypto_iov *data,
+ size_t num_data)
+{
+ return k5_des_docrypt_iov(key, ivec, data, num_data, 1);
+}
+
+static krb5_error_code
+k5_des_decrypt_iov(const krb5_keyblock *key,
+ const krb5_data *ivec,
+ krb5_crypto_iov *data,
+ size_t num_data)
+{
+ return k5_des_docrypt_iov(key, ivec, data, num_data, 0);
+}
+
+const struct krb5_enc_provider krb5int_enc_des = {
+ 8,
+ 7, 8,
+ k5_des_encrypt,
+ k5_des_decrypt,
+ k5_des_make_key,
+ krb5int_des_init_state,
+ krb5int_default_free_state,
+ k5_des_encrypt_iov,
+ k5_des_decrypt_iov
+};
--- /dev/null
+/*
+ * Copyright (C) 1998 by the FundsXpress, INC.
+ *
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may require
+ * a specific license from the United States Government. It is the
+ * responsibility of any person or organization contemplating export to
+ * obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of FundsXpress. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. FundsXpress makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "k5-int.h"
+#include "des_int.h"
+#include "../aead.h"
+
+static krb5_error_code
+validate_and_schedule(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_data *input, const krb5_data *output,
+ mit_des3_key_schedule *schedule)
+{
+ /* key->enctype was checked by the caller */
+
+ if (key->length != 24)
+ return(KRB5_BAD_KEYSIZE);
+ if ((input->length%8) != 0)
+ return(KRB5_BAD_MSIZE);
+ if (ivec && (ivec->length != 8))
+ return(KRB5_BAD_MSIZE);
+ if (input->length != output->length)
+ return(KRB5_BAD_MSIZE);
+
+ switch (mit_des3_key_sched(*(mit_des3_cblock *)key->contents,
+ *schedule)) {
+ case -1:
+ return(KRB5DES_BAD_KEYPAR);
+ case -2:
+ return(KRB5DES_WEAK_KEY);
+ }
+ return 0;
+}
+
+static krb5_error_code
+validate_and_schedule_iov(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_crypto_iov *data, size_t num_data,
+ mit_des3_key_schedule *schedule)
+{
+ size_t i, input_length;
+
+ for (i = 0, input_length = 0; i < num_data; i++) {
+ const krb5_crypto_iov *iov = &data[i];
+
+ if (ENCRYPT_IOV(iov))
+ input_length += iov->data.length;
+ }
+
+ if (key->length != 24)
+ return(KRB5_BAD_KEYSIZE);
+ if ((input_length%8) != 0)
+ return(KRB5_BAD_MSIZE);
+ if (ivec && (ivec->length != 8))
+ return(KRB5_BAD_MSIZE);
+
+ switch (mit_des3_key_sched(*(mit_des3_cblock *)key->contents,
+ *schedule)) {
+ case -1:
+ return(KRB5DES_BAD_KEYPAR);
+ case -2:
+ return(KRB5DES_WEAK_KEY);
+ }
+ return 0;
+}
+
+static krb5_error_code
+k5_des3_encrypt(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_data *input, krb5_data *output)
+{
+ mit_des3_key_schedule schedule;
+ krb5_error_code err;
+
+ err = validate_and_schedule(key, ivec, input, output, &schedule);
+ if (err)
+ return err;
+
+ /* this has a return value, but the code always returns zero */
+ krb5int_des3_cbc_encrypt((krb5_pointer) input->data,
+ (krb5_pointer) output->data, input->length,
+ schedule[0], schedule[1], schedule[2],
+ ivec?(const unsigned char *) ivec->data:(const unsigned char *)mit_des_zeroblock);
+
+ zap(schedule, sizeof(schedule));
+
+ return(0);
+}
+
+static krb5_error_code
+k5_des3_decrypt(const krb5_keyblock *key, const krb5_data *ivec,
+ const krb5_data *input, krb5_data *output)
+{
+ mit_des3_key_schedule schedule;
+ krb5_error_code err;
+
+ err = validate_and_schedule(key, ivec, input, output, &schedule);
+ if (err)
+ return err;
+
+ /* this has a return value, but the code always returns zero */
+ krb5int_des3_cbc_decrypt((krb5_pointer) input->data,
+ (krb5_pointer) output->data, input->length,
+ schedule[0], schedule[1], schedule[2],
+ ivec?(const unsigned char *) ivec->data:(const unsigned char *)mit_des_zeroblock);
+
+ zap(schedule, sizeof(schedule));
+
+ return(0);
+}
+
+static krb5_error_code
+k5_des3_make_key(const krb5_data *randombits, krb5_keyblock *key)
+{
+ int i;
+
+ if (key->length != 24)
+ return(KRB5_BAD_KEYSIZE);
+ if (randombits->length != 21)
+ return(KRB5_CRYPTO_INTERNAL);
+
+ key->magic = KV5M_KEYBLOCK;
+ key->length = 24;
+
+ /* take the seven bytes, move them around into the top 7 bits of the
+ 8 key bytes, then compute the parity bits. Do this three times. */
+
+ for (i=0; i<3; i++) {
+ memcpy(key->contents+i*8, randombits->data+i*7, 7);
+ key->contents[i*8+7] = (((key->contents[i*8]&1)<<1) |
+ ((key->contents[i*8+1]&1)<<2) |
+ ((key->contents[i*8+2]&1)<<3) |
+ ((key->contents[i*8+3]&1)<<4) |
+ ((key->contents[i*8+4]&1)<<5) |
+ ((key->contents[i*8+5]&1)<<6) |
+ ((key->contents[i*8+6]&1)<<7));
+
+ mit_des_fixup_key_parity(key->contents+i*8);
+ }
+
+ return(0);
+}
+
+static krb5_error_code
+k5_des3_encrypt_iov(const krb5_keyblock *key,
+ const krb5_data *ivec,
+ krb5_crypto_iov *data,
+ size_t num_data)
+{
+ mit_des3_key_schedule schedule;
+ krb5_error_code err;
+
+ err = validate_and_schedule_iov(key, ivec, data, num_data, &schedule);
+ if (err)
+ return err;
+
+ /* this has a return value, but the code always returns zero */
+ krb5int_des3_cbc_encrypt_iov(data, num_data,
+ schedule[0], schedule[1], schedule[2],
+ ivec != NULL ? (unsigned char *) ivec->data : NULL);
+
+ zap(schedule, sizeof(schedule));
+
+ return(0);
+}
+
+static krb5_error_code
+k5_des3_decrypt_iov(const krb5_keyblock *key,
+ const krb5_data *ivec,
+ krb5_crypto_iov *data,
+ size_t num_data)
+{
+ mit_des3_key_schedule schedule;
+ krb5_error_code err;
+
+ err = validate_and_schedule_iov(key, ivec, data, num_data, &schedule);
+ if (err)
+ return err;
+
+ /* this has a return value, but the code always returns zero */
+ krb5int_des3_cbc_decrypt_iov(data, num_data,
+ schedule[0], schedule[1], schedule[2],
+ ivec != NULL ? (unsigned char *) ivec->data : NULL);
+
+ zap(schedule, sizeof(schedule));
+
+ return(0);
+}
+
+const struct krb5_enc_provider krb5int_enc_des3 = {
+ 8,
+ 21, 24,
+ k5_des3_encrypt,
+ k5_des3_decrypt,
+ k5_des3_make_key,
+ krb5int_des_init_state,
+ krb5int_default_free_state,
+ k5_des3_encrypt_iov,
+ k5_des3_decrypt_iov
+};
+
--- /dev/null
+/*
+ * Copyright (C) 1998 by the FundsXpress, INC.
+ *
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may require
+ * a specific license from the United States Government. It is the
+ * responsibility of any person or organization contemplating export to
+ * obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of FundsXpress. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. FundsXpress makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "k5-int.h"
+
+extern const struct krb5_enc_provider krb5int_enc_des;
+extern const struct krb5_enc_provider krb5int_enc_des3;
+extern const struct krb5_enc_provider krb5int_enc_arcfour;
+extern const struct krb5_enc_provider krb5int_enc_aes128;
+extern const struct krb5_enc_provider krb5int_enc_aes256;
+extern const struct krb5_enc_provider krb5int_enc_aes128_ctr;
+extern const struct krb5_enc_provider krb5int_enc_aes256_ctr;
+
--- /dev/null
+/* arcfour.c
+ *
+ * Copyright (c) 2000 by Computer Science Laboratory,
+ * Rensselaer Polytechnic Institute
+ *
+ * #include STD_DISCLAIMER
+ */
+
+#include "k5-int.h"
+#include "arcfour-int.h"
+#include "enc_provider.h"
+#include "../aead.h"
+/* gets the next byte from the PRNG */
+#if ((__GNUC__ >= 2) )
+static __inline__ unsigned int k5_arcfour_byte(ArcfourContext *);
+#else
+static unsigned int k5_arcfour_byte(ArcfourContext *);
+#endif /* gcc inlines*/
+
+/* Initializes the context and sets the key. */
+static krb5_error_code k5_arcfour_init(ArcfourContext *ctx, const unsigned char *key,
+ unsigned int keylen);
+
+/* Encrypts/decrypts data. */
+static void k5_arcfour_crypt(ArcfourContext *ctx, unsigned char *dest,
+ const unsigned char *src, unsigned int len);
+
+/* Interface layer to kerb5 crypto layer */
+static krb5_error_code
+k5_arcfour_docrypt(const krb5_keyblock *, const krb5_data *,
+ const krb5_data *, krb5_data *);
+
+/* from a random bitstrem, construct a key */
+static krb5_error_code
+k5_arcfour_make_key(const krb5_data *, krb5_keyblock *);
+
+static const unsigned char arcfour_weakkey1[] = {0x00, 0x00, 0xfd};
+static const unsigned char arcfour_weakkey2[] = {0x03, 0xfd, 0xfc};
+static const struct {
+ size_t length;
+ const unsigned char *data;
+} arcfour_weakkeys[] = {
+ { sizeof (arcfour_weakkey1), arcfour_weakkey1},
+ { sizeof (arcfour_weakkey2), arcfour_weakkey2},
+};
+
+static inline unsigned int k5_arcfour_byte(ArcfourContext * ctx)
+{
+ unsigned int x;
+ unsigned int y;
+ unsigned int sx, sy;
+ unsigned char *state;
+
+ state = ctx->state;
+ x = (ctx->x + 1) & 0xff;
+ sx = state[x];
+ y = (sx + ctx->y) & 0xff;
+ sy = state[y];
+ ctx->x = x;
+ ctx->y = y;
+ state[y] = sx;
+ state[x] = sy;
+ return state[(sx + sy) & 0xff];
+}
+
+static void k5_arcfour_crypt(ArcfourContext *ctx, unsigned char *dest,
+ const unsigned char *src, unsigned int len)
+{
+ unsigned int i;
+ for (i = 0; i < len; i++)
+ dest[i] = src[i] ^ k5_arcfour_byte(ctx);
+}
+
+
+static krb5_error_code
+k5_arcfour_init(ArcfourContext *ctx, const unsigned char *key,
+ unsigned int key_len)
+{
+ unsigned int t, u;
+ unsigned int keyindex;
+ unsigned int stateindex;
+ unsigned char* state;
+ unsigned int counter;
+
+ if (key_len != 16)
+ return KRB5_BAD_MSIZE; /*this is probably not the correct error code
+ to return */
+ for (counter=0;
+ counter < sizeof(arcfour_weakkeys)/sizeof(arcfour_weakkeys[0]);
+ counter++)
+ if (!memcmp(key, arcfour_weakkeys[counter].data,
+ arcfour_weakkeys[counter].length))
+ return KRB5DES_WEAK_KEY; /* most certainly not the correct error */
+
+ state = &ctx->state[0];
+ ctx->x = 0;
+ ctx->y = 0;
+ for (counter = 0; counter < 256; counter++)
+ state[counter] = counter;
+ keyindex = 0;
+ stateindex = 0;
+ for (counter = 0; counter < 256; counter++)
+ {
+ t = state[counter];
+ stateindex = (stateindex + key[keyindex] + t) & 0xff;
+ u = state[stateindex];
+ state[stateindex] = t;
+ state[counter] = u;
+ if (++keyindex >= key_len)
+ keyindex = 0;
+ }
+ return 0;
+}
+
+
+/* The workhorse of the arcfour system, this impliments the cipher */
+static krb5_error_code
+k5_arcfour_docrypt(const krb5_keyblock *key, const krb5_data *state,
+ const krb5_data *input, krb5_data *output)
+{
+ ArcfourContext *arcfour_ctx;
+ ArcFourCipherState *cipher_state;
+ int ret;
+
+ if (key->length != 16)
+ return(KRB5_BAD_KEYSIZE);
+ if (state && (state->length != sizeof (ArcFourCipherState)))
+ return(KRB5_BAD_MSIZE);
+ if (input->length != output->length)
+ return(KRB5_BAD_MSIZE);
+
+ if (state) {
+ cipher_state = (ArcFourCipherState *) state->data;
+ arcfour_ctx=&cipher_state->ctx;
+ if (cipher_state->initialized == 0) {
+ if ((ret=k5_arcfour_init(arcfour_ctx, key->contents, key->length))) {
+ return ret;
+ }
+ cipher_state->initialized = 1;
+ }
+ k5_arcfour_crypt(arcfour_ctx, (unsigned char *) output->data, (const unsigned char *) input->data, input->length);
+ }
+ else {
+ arcfour_ctx=malloc(sizeof (ArcfourContext));
+ if (arcfour_ctx == NULL)
+ return ENOMEM;
+ if ((ret=k5_arcfour_init(arcfour_ctx, key->contents, key->length))) {
+ free(arcfour_ctx);
+ return (ret);
+ }
+ k5_arcfour_crypt(arcfour_ctx, (unsigned char * ) output->data,
+ (const unsigned char * ) input->data, input->length);
+ memset(arcfour_ctx, 0, sizeof (ArcfourContext));
+ free(arcfour_ctx);
+ }
+
+ return 0;
+}
+
+/* In-place encryption */
+static krb5_error_code
+k5_arcfour_docrypt_iov(const krb5_keyblock *key,
+ const krb5_data *state,
+ krb5_crypto_iov *data,
+ size_t num_data)
+{
+ ArcfourContext *arcfour_ctx = NULL;
+ ArcFourCipherState *cipher_state = NULL;
+ krb5_error_code ret;
+ size_t i;
+
+ if (key->length != 16)
+ return KRB5_BAD_KEYSIZE;
+ if (state != NULL && (state->length != sizeof(ArcFourCipherState)))
+ return KRB5_BAD_MSIZE;
+
+ if (state != NULL) {
+ cipher_state = (ArcFourCipherState *)state->data;
+ arcfour_ctx = &cipher_state->ctx;
+ if (cipher_state->initialized == 0) {
+ ret = k5_arcfour_init(arcfour_ctx, key->contents, key->length);
+ if (ret != 0)
+ return ret;
+
+ cipher_state->initialized = 1;
+ }
+ } else {
+ arcfour_ctx = (ArcfourContext *)malloc(sizeof(ArcfourContext));
+ if (arcfour_ctx == NULL)
+ return ENOMEM;
+
+ ret = k5_arcfour_init(arcfour_ctx, key->contents, key->length);
+ if (ret != 0) {
+ free(arcfour_ctx);
+ return ret;
+ }
+ }
+
+ for (i = 0; i < num_data; i++) {
+ krb5_crypto_iov *iov = &data[i];
+
+ if (ENCRYPT_IOV(iov))
+ k5_arcfour_crypt(arcfour_ctx, (unsigned char *)iov->data.data,
+ (const unsigned char *)iov->data.data, iov->data.length);
+ }
+
+ if (state == NULL) {
+ memset(arcfour_ctx, 0, sizeof(ArcfourContext));
+ free(arcfour_ctx);
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+k5_arcfour_make_key(const krb5_data *randombits, krb5_keyblock *key)
+{
+ if (key->length != 16)
+ return(KRB5_BAD_KEYSIZE);
+ if (randombits->length != 16)
+ return(KRB5_CRYPTO_INTERNAL);
+
+ key->magic = KV5M_KEYBLOCK;
+ key->length = 16;
+
+ memcpy(key->contents, randombits->data, randombits->length);
+
+ return(0);
+}
+
+static krb5_error_code
+k5_arcfour_init_state (const krb5_keyblock *key,
+ krb5_keyusage keyusage, krb5_data *new_state)
+{
+ /* Note that we can't actually set up the state here because the key
+ * will change between now and when encrypt is called
+ * because it is data dependent. Yeah, this has strange
+ * properties. --SDH
+ */
+ new_state->length = sizeof (ArcFourCipherState);
+ new_state->data = malloc (new_state->length);
+ if (new_state->data) {
+ memset (new_state->data, 0 , new_state->length);
+ /* That will set initialized to zero*/
+ }else {
+ return (ENOMEM);
+ }
+ return 0;
+}
+
+/* Since the arcfour cipher is identical going forwards and backwards,
+ we just call "docrypt" directly
+*/
+const struct krb5_enc_provider krb5int_enc_arcfour = {
+ /* This seems to work... although I am not sure what the
+ implications are in other places in the kerberos library */
+ 1,
+ /* Keysize is arbitrary in arcfour, but the constraints of the
+ system, and to attempt to work with the MSFT system forces us
+ to 16byte/128bit. Since there is no parity in the key, the
+ byte and length are the same. */
+ 16, 16,
+ k5_arcfour_docrypt,
+ k5_arcfour_docrypt,
+ k5_arcfour_make_key,
+ k5_arcfour_init_state, /*xxx not implemented yet*/
+ krb5int_default_free_state,
+ k5_arcfour_docrypt_iov,
+ k5_arcfour_docrypt_iov
+};
+
gss_iov_buffer_desc *, /* iov */
int); /* iov_count */
+
+/*
+ * Protocol transition
+ */
+OM_uint32 KRB5_CALLCONV
+gss_acquire_cred_impersonate_name(
+ OM_uint32 *, /* minor_status */
+ const gss_cred_id_t, /* impersonator_cred_handle */
+ const gss_name_t, /* desired_name */
+ OM_uint32, /* time_req */
+ const gss_OID_set, /* desired_mechs */
+ gss_cred_usage_t, /* cred_usage */
+ gss_cred_id_t *, /* output_cred_handle */
+ gss_OID_set *, /* actual_mechs */
+ OM_uint32 *); /* time_rec */
+
+OM_uint32 KRB5_CALLCONV
+gss_add_cred_impersonate_name(
+ OM_uint32 *, /* minor_status */
+ gss_cred_id_t, /* input_cred_handle */
+ const gss_cred_id_t, /* impersonator_cred_handle */
+ const gss_name_t, /* desired_name */
+ const gss_OID, /* desired_mech */
+ gss_cred_usage_t, /* cred_usage */
+ OM_uint32, /* initiator_time_req */
+ OM_uint32, /* acceptor_time_req */
+ gss_cred_id_t *, /* output_cred_handle */
+ gss_OID_set *, /* actual_mechs */
+ OM_uint32 *, /* initiator_time_rec */
+ OM_uint32 *); /* acceptor_time_rec */
+
#ifdef __cplusplus
}
#endif
$(srcdir)/rel_cred.c \
$(srcdir)/rel_oid.c \
$(srcdir)/rel_name.c \
+ $(srcdir)/s4u_gss_glue.c \
$(srcdir)/seal.c \
$(srcdir)/set_allowable_enctypes.c \
$(srcdir)/ser_sctx.c \
$(OUTPRE)rel_cred.$(OBJEXT) \
$(OUTPRE)rel_oid.$(OBJEXT) \
$(OUTPRE)rel_name.$(OBJEXT) \
+ $(OUTPRE)s4u_gss_glue.$(OBJEXT) \
$(OUTPRE)seal.$(OBJEXT) \
$(OUTPRE)set_allowable_enctypes.$(OBJEXT) \
$(OUTPRE)ser_sctx.$(OBJEXT) \
rel_cred.o \
rel_oid.o \
rel_name.o \
+ s4u_gss_glue.o \
seal.o \
set_allowable_enctypes.o \
ser_sctx.o \
#ifndef LEAN_CLIENT
+static OM_uint32
+create_constrained_deleg_creds(OM_uint32 *minor_status,
+ krb5_gss_cred_id_t verifier_cred_handle,
+ krb5_ticket *ticket,
+ krb5_gss_cred_id_t *out_cred,
+ krb5_context context)
+{
+ OM_uint32 major_status;
+ krb5_creds krb_creds;
+ krb5_data *data;
+ krb5_error_code code;
+
+ assert(out_cred != NULL);
+ assert(verifier_cred_handle->usage == GSS_C_BOTH);
+
+ memset(&krb_creds, 0, sizeof(krb_creds));
+ krb_creds.client = ticket->enc_part2->client;
+ krb_creds.server = ticket->server;
+ krb_creds.keyblock = *(ticket->enc_part2->session);
+ krb_creds.ticket_flags = ticket->enc_part2->flags;
+ krb_creds.times = ticket->enc_part2->times;
+ krb_creds.magic = KV5M_CREDS;
+ krb_creds.authdata = NULL;
+
+ code = encode_krb5_ticket(ticket, &data);
+ if (code) {
+ *minor_status = code;
+ return GSS_S_FAILURE;
+ }
+
+ krb_creds.ticket = *data;
+
+ major_status = kg_compose_deleg_cred(minor_status,
+ verifier_cred_handle,
+ &krb_creds,
+ GSS_C_INDEFINITE,
+ GSS_C_NO_OID_SET,
+ out_cred,
+ NULL,
+ NULL,
+ context);
+
+ krb5_free_data(context, data);
+
+ return major_status;
+}
+
/* Decode, decrypt and store the forwarded creds in the local ccache. */
static krb5_error_code
rd_and_store_for_creds(context, auth_context, inbuf, out_cred)
ctx->krb_times = ticket->enc_part2->times; /* struct copy */
ctx->krb_flags = ticket->enc_part2->flags;
+ if (delegated_cred_handle != NULL &&
+ deleg_cred == NULL && /* no unconstrained delegation */
+ cred->usage == GSS_C_BOTH &&
+ (ticket->enc_part2->flags & TKT_FLG_FORWARDABLE)) {
+ /*
+ * Now, we always fabricate a delegated credentials handle
+ * containing the service ticket to ourselves, which can be
+ * used for S4U2Proxy.
+ */
+ major_status = create_constrained_deleg_creds(minor_status, cred,
+ ticket, &deleg_cred,
+ context);
+ if (GSS_ERROR(major_status))
+ goto fail;
+ ctx->gss_flags |= GSS_C_DELEG_FLAG;
+ }
+
krb5_free_ticket(context, ticket); /* Done with ticket */
{
if (src_name)
*src_name = (gss_name_t) name;
- if (delegated_cred_handle && deleg_cred) {
- if (!kg_save_cred_id((gss_cred_id_t) deleg_cred)) {
+ if (delegated_cred_handle) {
+ if (!kg_save_cred_id((gss_cred_id_t) deleg_cred)) {
major_status = GSS_S_FAILURE;
code = G_VALIDATE_FAILED;
goto fail;
cred->usage = cred_usage;
cred->princ = NULL;
- cred->prerfc_mech = req_old;
- cred->rfc_mech = req_new;
+ cred->prerfc_mech = (req_old != 0);
+ cred->rfc_mech = (req_new != 0);
#ifndef LEAN_CLIENT
cred->keytab = NULL;
*minor_status = 0;
return GSS_S_COMPLETE;
}
+
/* name/type of credential */
gss_cred_usage_t usage;
krb5_principal princ; /* this is not interned as a gss_name_t */
- int prerfc_mech;
- int rfc_mech;
+ unsigned int prerfc_mech : 1;
+ unsigned int rfc_mech : 1;
+ unsigned int proxy_cred : 1;
/* keytab (accept) data */
krb5_keytab keytab;
krb5_error_code kg_allocate_iov(gss_iov_buffer_t iov, size_t size);
+krb5_error_code
+krb5_to_gss_cred(krb5_context context,
+ krb5_creds *creds,
+ krb5_gss_cred_id_t *out_cred);
+
+OM_uint32
+kg_new_connection(
+ OM_uint32 *minor_status,
+ krb5_gss_cred_id_t cred,
+ gss_ctx_id_t *context_handle,
+ gss_name_t target_name,
+ gss_OID mech_type,
+ OM_uint32 req_flags,
+ OM_uint32 time_req,
+ gss_channel_bindings_t input_chan_bindings,
+ gss_buffer_t input_token,
+ gss_OID *actual_mech_type,
+ gss_buffer_t output_token,
+ OM_uint32 *ret_flags,
+ OM_uint32 *time_rec,
+ krb5_context context,
+ int default_mech);
+
/** declarations of internal name mechanism functions **/
OM_uint32 krb5_gss_acquire_cred
gss_cred_id_t /* cred */
);
+OM_uint32 krb5_gss_acquire_cred_impersonate_name(
+ OM_uint32 *, /* minor_status */
+ const gss_cred_id_t, /* impersonator_cred_handle */
+ const gss_name_t, /* desired_name */
+ OM_uint32, /* time_req */
+ const gss_OID_set, /* desired_mechs */
+ gss_cred_usage_t, /* cred_usage */
+ gss_cred_id_t *, /* output_cred_handle */
+ gss_OID_set *, /* actual_mechs */
+ OM_uint32 *); /* time_rec */
+
OM_uint32
krb5_gss_validate_cred_1(OM_uint32 * /* minor_status */,
gss_cred_id_t /* cred_handle */,
int gss_krb5int_rotate_left (void *ptr, size_t bufsiz, size_t rc);
+/* s4u_gss_glue.c */
+OM_uint32
+kg_compose_deleg_cred(OM_uint32 *minor_status,
+ krb5_gss_cred_id_t impersonator_cred,
+ krb5_creds *subject_creds,
+ OM_uint32 time_req,
+ const gss_OID_set desired_mechs,
+ krb5_gss_cred_id_t *output_cred,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *time_rec,
+ krb5_context context);
+
+
/*
* These take unglued krb5-mech-specific contexts.
*/
/* gss_nt_krb5_principal. Object identifier for a krb5_principal. Do not use. */
{10, "\052\206\110\206\367\022\001\002\002\002"},
+
{ 0, 0 }
};
/*
* gss_set_sec_context_option() methods
*/
-#if 0
static struct {
gss_OID_desc oid;
OM_uint32 (*func)(OM_uint32 *, gss_ctx_id_t *, const gss_OID, const gss_buffer_t);
} krb5_gss_set_sec_context_option_ops[] = {
};
-#endif
static OM_uint32
krb5_gss_set_sec_context_option (OM_uint32 *minor_status,
return GSS_S_NO_CONTEXT;
ctx = (krb5_gss_ctx_id_rec *) context_handle;
-
- if (!ctx->established)
- return GSS_S_NO_CONTEXT;
}
-#if 0
for (i = 0; i < sizeof(krb5_gss_set_sec_context_option_ops)/
sizeof(krb5_gss_set_sec_context_option_ops[0]); i++) {
if (g_OID_prefix_equal(desired_object, &krb5_gss_set_sec_context_option_ops[i].oid)) {
value);
}
}
-#endif
*minor_status = EINVAL;
{
{GSS_KRB5_SET_CRED_RCACHE_OID_LENGTH, GSS_KRB5_SET_CRED_RCACHE_OID},
gss_krb5int_set_cred_rcache
- }
+ },
};
static OM_uint32
{
{GSS_KRB5_USE_KDC_CONTEXT_OID_LENGTH, GSS_KRB5_USE_KDC_CONTEXT_OID},
krb5int_gss_use_kdc_context
- }
+ },
};
static OM_uint32
krb5_gss_unwrap_iov,
krb5_gss_wrap_iov_length,
NULL, /* complete_auth_token */
+ krb5_gss_acquire_cred_impersonate_name,
+ NULL, /* krb5_gss_add_cred_impersonate_name */
};
krb5_context context;
krb5_principal princ;
krb5_error_code code;
- unsigned char *cp, *end;
- char *stringrep, *tmp, *tmp2;
+ char *stringrep, *tmp, *tmp2, *cp;
OM_uint32 length;
#ifndef NO_PASSWORD
struct passwd *pw;
goto do_getpwuid;
#endif
} else if (g_OID_equal(input_name_type, gss_nt_exported_name)) {
-#define BOUNDS_CHECK(cp, end, n) do { if ((end) - (cp) < (n)) \
- goto fail_name; } while (0)
- cp = (unsigned char *)tmp;
- end = cp + input_name_buffer->length;
-
- BOUNDS_CHECK(cp, end, 4);
+ cp = tmp;
if (*cp++ != 0x04)
goto fail_name;
if (*cp++ != 0x01)
if (*cp++ != 0x00)
goto fail_name;
length = *cp++;
- if (length != (ssize_t)gss_mech_krb5->length+2)
+ if (length != gss_mech_krb5->length+2)
goto fail_name;
-
- BOUNDS_CHECK(cp, end, 2);
if (*cp++ != 0x06)
goto fail_name;
length = *cp++;
if (length != gss_mech_krb5->length)
goto fail_name;
-
- BOUNDS_CHECK(cp, end, length);
if (memcmp(cp, gss_mech_krb5->elements, length) != 0)
goto fail_name;
cp += length;
-
- BOUNDS_CHECK(cp, end, 4);
length = *cp++;
length = (length << 8) | *cp++;
length = (length << 8) | *cp++;
length = (length << 8) | *cp++;
-
- BOUNDS_CHECK(cp, end, length);
tmp2 = malloc(length+1);
if (tmp2 == NULL) {
xfree(tmp);
krb5_free_context(context);
return GSS_S_FAILURE;
}
- strncpy(tmp2, (char *)cp, length);
+ strncpy(tmp2, cp, length);
tmp2[length] = 0;
stringrep = tmp2;
krb5_creds **out_creds;
{
krb5_error_code code;
- krb5_creds in_creds;
+ krb5_creds in_creds, evidence_creds;
+ krb5_flags flags = 0;
+ krb5_principal cc_princ = NULL;
k5_mutex_assert_locked(&cred->lock);
memset(&in_creds, 0, sizeof(krb5_creds));
+ memset(&evidence_creds, 0, sizeof(krb5_creds));
in_creds.client = in_creds.server = NULL;
- if ((code = krb5_copy_principal(context, cred->princ, &in_creds.client)))
+ if ((code = krb5_cc_get_principal(context, cred->ccache, &cc_princ)))
goto cleanup;
- if ((code = krb5_copy_principal(context, server, &in_creds.server)))
- goto cleanup;
- in_creds.times.endtime = endtime;
- in_creds.keyblock.enctype = 0;
+ /*
+ * Do constrained delegation if we have proxy credentials and
+ * we're not trying to get a ticket to ourselves (in which case
+ * we can just use the S4U2Self or evidence ticket directly).
+ */
+ if (cred->proxy_cred &&
+ !krb5_principal_compare(context, cc_princ, server)) {
+ krb5_creds mcreds;
+
+ flags |= KRB5_GC_CANONICALIZE |
+ KRB5_GC_NO_STORE |
+ KRB5_GC_CONSTRAINED_DELEGATION;
+
+ memset(&mcreds, 0, sizeof(mcreds));
- code = krb5_get_credentials(context, 0, cred->ccache,
+ mcreds.magic = KV5M_CREDS;
+ mcreds.times.endtime = cred->tgt_expire;
+ mcreds.server = cc_princ;
+ mcreds.client = cred->princ;
+
+ code = krb5_cc_retrieve_cred(context, cred->ccache,
+ KRB5_TC_MATCH_TIMES, &mcreds,
+ &evidence_creds);
+ if (code)
+ goto cleanup;
+
+ assert(evidence_creds.ticket_flags & TKT_FLG_FORWARDABLE);
+
+ in_creds.client = cc_princ;
+ in_creds.second_ticket = evidence_creds.ticket;
+ } else {
+ in_creds.client = cred->princ;
+ }
+
+ in_creds.server = server;
+ in_creds.times.endtime = endtime;
+
+ code = krb5_get_credentials(context, flags, cred->ccache,
&in_creds, out_creds);
if (code)
goto cleanup;
+ if (flags & KRB5_GC_CONSTRAINED_DELEGATION) {
+ if (!krb5_principal_compare(context, cred->princ,
+ (*out_creds)->client)) {
+ /* server did not support constrained delegation */
+ code = KRB5_KDCREP_MODIFIED;
+ goto cleanup;
+ }
+ }
+
/*
* Enforce a stricter limit (without timeskew forgiveness at the
* boundaries) because accept_sec_context code is also similarly
}
cleanup:
- if (in_creds.client)
- krb5_free_principal(context, in_creds.client);
- if (in_creds.server)
- krb5_free_principal(context, in_creds.server);
+ if (cc_princ)
+ krb5_free_principal(context, cc_princ);
+ krb5_free_cred_contents(context, &evidence_creds);
+
return code;
}
struct gss_checksum_data {
*
* Do the grunt work of setting up a new context.
*/
-static OM_uint32
-new_connection(
+OM_uint32
+kg_new_connection(
OM_uint32 *minor_status,
krb5_gss_cred_id_t cred,
gss_ctx_id_t *context_handle,
/*SUPPRESS 29*/
if (*context_handle == GSS_C_NO_CONTEXT) {
- major_status = new_connection(minor_status, cred, context_handle,
- target_name, mech_type, req_flags,
- time_req, input_chan_bindings,
- input_token, actual_mech_type,
- output_token, ret_flags, time_rec,
- context, default_mech);
+ major_status = kg_new_connection(minor_status, cred, context_handle,
+ target_name, mech_type, req_flags,
+ time_req, input_chan_bindings,
+ input_token, actual_mech_type,
+ output_token, ret_flags, time_rec,
+ context, default_mech);
k5_mutex_unlock(&cred->lock);
if (*context_handle == GSS_C_NO_CONTEXT) {
save_error_info (*minor_status, context);
return GSS_S_COMPLETE;
}
+
--- /dev/null
+/* -*- mode: c; indent-tabs-mode: nil -*- */
+/*
+ * Copyright 2009 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ *
+ */
+#include "k5-int.h"
+#include "gssapiP_krb5.h"
+#ifdef HAVE_MEMORY_H
+#include <memory.h>
+#endif
+#include <assert.h>
+
+static OM_uint32
+kg_set_desired_mechs(OM_uint32 *minor_status,
+ const gss_OID_set desired_mechs,
+ krb5_gss_cred_id_t cred)
+{
+ unsigned int i;
+
+ if (desired_mechs == GSS_C_NULL_OID_SET) {
+ cred->prerfc_mech = 1;
+ cred->rfc_mech = 1;
+ } else {
+ cred->prerfc_mech = 0;
+ cred->rfc_mech = 0;
+
+ for (i = 0; i < desired_mechs->count; i++) {
+ if (g_OID_equal(gss_mech_krb5_old, &desired_mechs->elements[i]))
+ cred->prerfc_mech = 1;
+ else if (g_OID_equal(gss_mech_krb5, &desired_mechs->elements[i]))
+ cred->rfc_mech = 1;
+ }
+
+ if (!cred->prerfc_mech && !cred->rfc_mech) {
+ *minor_status = 0;
+ return GSS_S_BAD_MECH;
+ }
+ }
+
+ return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+kg_return_mechs(OM_uint32 *minor_status,
+ krb5_gss_cred_id_t cred,
+ gss_OID_set *actual_mechs)
+{
+ OM_uint32 major_status, minor;
+ gss_OID_set mechs;
+
+ if (actual_mechs == NULL)
+ return GSS_S_COMPLETE;
+
+ major_status = generic_gss_create_empty_oid_set(minor_status, &mechs);
+ if (GSS_ERROR(major_status))
+ return major_status;
+
+ if (cred->prerfc_mech) {
+ major_status = generic_gss_add_oid_set_member(minor_status,
+ gss_mech_krb5_old,
+ &mechs);
+ if (GSS_ERROR(major_status)) {
+ generic_gss_release_oid_set(&minor, &mechs);
+ return major_status;
+ }
+ }
+ if (cred->rfc_mech) {
+ major_status = generic_gss_add_oid_set_member(minor_status,
+ gss_mech_krb5,
+ &mechs);
+ if (GSS_ERROR(major_status)) {
+ generic_gss_release_oid_set(&minor, &mechs);
+ return major_status;
+ }
+ }
+
+ *actual_mechs = mechs;
+
+ return GSS_S_COMPLETE;
+}
+
+static int
+kg_is_initiator_cred(krb5_gss_cred_id_t cred)
+{
+ return (cred->usage == GSS_C_INITIATE || cred->usage == GSS_C_BOTH) &&
+ (cred->ccache != NULL);
+}
+
+static OM_uint32
+kg_impersonate_name(OM_uint32 *minor_status,
+ const krb5_gss_cred_id_t impersonator_cred,
+ const krb5_principal user,
+ OM_uint32 time_req,
+ const gss_OID_set desired_mechs,
+ krb5_gss_cred_id_t *output_cred,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *time_rec,
+ krb5_context context)
+{
+ OM_uint32 major_status;
+ krb5_error_code code;
+ krb5_creds in_creds, *out_creds = NULL;
+
+ memset(&in_creds, 0, sizeof(in_creds));
+ memset(&out_creds, 0, sizeof(out_creds));
+
+ in_creds.client = user;
+ in_creds.server = impersonator_cred->princ;
+
+ if (impersonator_cred->req_enctypes != NULL)
+ in_creds.keyblock.enctype = impersonator_cred->req_enctypes[0];
+
+ code = krb5_get_credentials_for_user(context,
+ KRB5_GC_CANONICALIZE | KRB5_GC_NO_STORE,
+ impersonator_cred->ccache,
+ &in_creds,
+ NULL, &out_creds);
+ if (code != 0) {
+ *minor_status = code;
+ return GSS_S_FAILURE;
+ }
+
+ major_status = kg_compose_deleg_cred(minor_status,
+ impersonator_cred,
+ out_creds,
+ time_req,
+ desired_mechs,
+ output_cred,
+ actual_mechs,
+ time_rec,
+ context);
+
+ krb5_free_creds(context, out_creds);
+
+ return major_status;
+}
+
+OM_uint32
+krb5_gss_acquire_cred_impersonate_name(OM_uint32 *minor_status,
+ const gss_cred_id_t impersonator_cred_handle,
+ const gss_name_t desired_name,
+ OM_uint32 time_req,
+ const gss_OID_set desired_mechs,
+ gss_cred_usage_t cred_usage,
+ gss_cred_id_t *output_cred_handle,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *time_rec)
+{
+ OM_uint32 major_status;
+ krb5_error_code code;
+ krb5_gss_cred_id_t cred;
+ krb5_context context;
+
+ if (impersonator_cred_handle == GSS_C_NO_CREDENTIAL)
+ return GSS_S_CALL_INACCESSIBLE_READ;
+
+ if (desired_name == GSS_C_NO_NAME)
+ return GSS_S_CALL_INACCESSIBLE_READ;
+
+ if (output_cred_handle == NULL)
+ return GSS_S_CALL_INACCESSIBLE_WRITE;
+
+ if (cred_usage != GSS_C_INITIATE) {
+ *minor_status = (OM_uint32)G_BAD_USAGE;
+ return GSS_S_FAILURE;
+ }
+
+ *output_cred_handle = GSS_C_NO_CREDENTIAL;
+ if (actual_mechs != NULL)
+ *actual_mechs = GSS_C_NO_OID_SET;
+ if (time_rec != NULL)
+ *time_rec = 0;
+
+ code = krb5_gss_init_context(&context);
+ if (code != 0) {
+ *minor_status = code;
+ return GSS_S_FAILURE;
+ }
+
+ major_status = krb5_gss_validate_cred_1(minor_status,
+ impersonator_cred_handle,
+ context);
+ if (GSS_ERROR(major_status)) {
+ krb5_free_context(context);
+ return major_status;
+ }
+
+ major_status = kg_impersonate_name(minor_status,
+ (krb5_gss_cred_id_t)impersonator_cred_handle,
+ (krb5_principal)desired_name,
+ time_req,
+ desired_mechs,
+ &cred,
+ actual_mechs,
+ time_rec,
+ context);
+
+ *output_cred_handle = (gss_cred_id_t)cred;
+
+ k5_mutex_unlock(&((krb5_gss_cred_id_t)impersonator_cred_handle)->lock);
+ krb5_free_context(context);
+
+ return major_status;
+
+}
+
+OM_uint32
+kg_compose_deleg_cred(OM_uint32 *minor_status,
+ krb5_gss_cred_id_t impersonator_cred,
+ krb5_creds *subject_creds,
+ OM_uint32 time_req,
+ const gss_OID_set desired_mechs,
+ krb5_gss_cred_id_t *output_cred,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *time_rec,
+ krb5_context context)
+{
+ OM_uint32 major_status;
+ krb5_error_code code;
+ krb5_gss_cred_id_t cred = NULL;
+
+ k5_mutex_assert_locked(&impersonator_cred->lock);
+
+ if (!kg_is_initiator_cred(impersonator_cred) ||
+ impersonator_cred->princ == NULL ||
+ impersonator_cred->proxy_cred) {
+ code = G_BAD_USAGE;
+ goto cleanup;
+ }
+
+ assert(subject_creds != NULL);
+ assert(subject_creds->client != NULL);
+
+ cred = xmalloc(sizeof(*cred));
+ if (cred == NULL) {
+ code = ENOMEM;
+ goto cleanup;
+ }
+ memset(cred, 0, sizeof(*cred));
+
+ code = k5_mutex_init(&cred->lock);
+ if (code != 0)
+ goto cleanup;
+
+ /*
+ * Only return a "proxy" credential for use with constrained
+ * delegation if the subject credentials are forwardable.
+ * Submitting non-forwardable credentials to the KDC for use
+ * with constrained delegation will only return an error.
+ */
+ cred->usage = GSS_C_INITIATE;
+ cred->proxy_cred = !!(subject_creds->ticket_flags & TKT_FLG_FORWARDABLE);
+
+ major_status = kg_set_desired_mechs(minor_status, desired_mechs, cred);
+ if (GSS_ERROR(major_status))
+ goto cleanup;
+
+ cred->tgt_expire = impersonator_cred->tgt_expire;
+
+ code = krb5_copy_principal(context, subject_creds->client, &cred->princ);
+ if (code != 0)
+ goto cleanup;
+
+ code = krb5_cc_new_unique(context, "MEMORY", NULL, &cred->ccache);
+ if (code != 0)
+ goto cleanup;
+
+ code = krb5_cc_initialize(context, cred->ccache,
+ cred->proxy_cred ? impersonator_cred->princ :
+ (krb5_principal)subject_creds->client);
+ if (code != 0)
+ goto cleanup;
+
+ if (cred->proxy_cred) {
+ /* Impersonator's TGT will be necessary for S4U2Proxy */
+ code = krb5_cc_copy_creds(context, impersonator_cred->ccache,
+ cred->ccache);
+ if (code != 0)
+ goto cleanup;
+ }
+
+ code = krb5_cc_store_cred(context, cred->ccache, subject_creds);
+ if (code != 0)
+ goto cleanup;
+
+ if (time_rec != NULL) {
+ krb5_timestamp now;
+
+ code = krb5_timeofday(context, &now);
+ if (code != 0)
+ goto cleanup;
+
+ *time_rec = cred->tgt_expire - now;
+ }
+
+ major_status = kg_return_mechs(minor_status, cred, actual_mechs);
+ if (GSS_ERROR(major_status))
+ goto cleanup;
+
+ if (!kg_save_cred_id((gss_cred_id_t)cred)) {
+ code = G_VALIDATE_FAILED;
+ goto cleanup;
+ }
+
+ major_status = GSS_S_COMPLETE;
+ *minor_status = 0;
+ *output_cred = cred;
+
+cleanup:
+ if (code != 0) {
+ *minor_status = code;
+ major_status = GSS_S_FAILURE;
+ }
+
+ if (GSS_ERROR(major_status) && cred != NULL) {
+ k5_mutex_destroy(&cred->lock);
+ if (cred->ccache != NULL)
+ krb5_cc_destroy(context, cred->ccache);
+ if (cred->princ != NULL)
+ krb5_free_principal(context, cred->princ);
+ xfree(cred);
+ }
+
+ return major_status;
+}
+
*minor_status = code;
return(GSS_S_DEFECTIVE_CREDENTIAL);
}
- if (!krb5_principal_compare(context, princ, cred->princ)) {
+ if (!cred->proxy_cred &&
+ !krb5_principal_compare(context, princ, cred->princ)) {
k5_mutex_unlock(&cred->lock);
*minor_status = KG_CCACHE_NOMATCH;
return(GSS_S_DEFECTIVE_CREDENTIAL);
GSS_KRB5_NT_PRINCIPAL_NAME
gss_accept_sec_context
gss_acquire_cred
+gss_acquire_cred_impersonate_name
gss_add_buffer_set_member
gss_add_cred
+gss_add_cred_impersonate_name
gss_add_oid_set_member
gss_canonicalize_name
gss_compare_name
SRCS = \
$(srcdir)/g_accept_sec_context.c \
$(srcdir)/g_acquire_cred.c \
+ $(srcdir)/g_acquire_cred_imp_name.c \
$(srcdir)/g_buffer_set.c \
$(srcdir)/g_canon_name.c \
$(srcdir)/g_compare_name.c \
OBJS = \
$(OUTPRE)g_accept_sec_context.$(OBJEXT) \
$(OUTPRE)g_acquire_cred.$(OBJEXT) \
+ $(OUTPRE)g_acquire_cred_imp_name.$(OBJEXT) \
$(OUTPRE)g_buffer_set.$(OBJEXT) \
$(OUTPRE)g_canon_name.$(OBJEXT) \
$(OUTPRE)g_compare_name.$(OBJEXT) \
STLIBOBJS = \
g_accept_sec_context.o \
g_acquire_cred.o \
+ g_acquire_cred_imp_name.o \
g_buffer_set.o \
g_canon_name.o \
g_compare_name.o \
gss_name_t tmp_src_name = GSS_C_NO_NAME;
gss_OID_desc token_mech_type_desc;
gss_OID token_mech_type = &token_mech_type_desc;
+ gss_OID actual_mech = GSS_C_NO_OID;
gss_mechanism mech;
status = val_acc_sec_ctx_args(minor_status,
input_cred_handle,
input_token_buffer,
input_chan_bindings,
- &internal_name,
- mech_type,
+ src_name ? &internal_name : NULL,
+ &actual_mech,
output_token,
&temp_ret_flags,
time_rec,
* then call gss_import_name() to create
* the union name struct cast to src_name
*/
- if (internal_name != NULL) {
- temp_status = gssint_convert_name_to_union_name(
- &temp_minor_status, mech,
- internal_name, &tmp_src_name);
- if (temp_status != GSS_S_COMPLETE) {
- *minor_status = temp_minor_status;
- map_error(minor_status, mech);
- if (output_token->length)
- (void) gss_release_buffer(&temp_minor_status,
- output_token);
- if (internal_name != GSS_C_NO_NAME)
- mech->gss_release_name(
- &temp_minor_status,
- &internal_name);
- return (temp_status);
- }
- if (src_name != NULL) {
+ if (src_name != NULL) {
+ if (internal_name != GSS_C_NO_NAME) {
+ /* consumes internal_name regardless of success */
+ temp_status = gssint_convert_name_to_union_name(
+ &temp_minor_status, mech,
+ internal_name, &tmp_src_name);
+ if (temp_status != GSS_S_COMPLETE) {
+ *minor_status = temp_minor_status;
+ map_error(minor_status, mech);
+ if (output_token->length)
+ (void) gss_release_buffer(&temp_minor_status,
+ output_token);
+ return (temp_status);
+ }
*src_name = tmp_src_name;
- }
- } else if (src_name != NULL) {
- *src_name = GSS_C_NO_NAME;
+ } else
+ *src_name = GSS_C_NO_NAME;
}
+#define g_OID_prefix_equal(o1, o2) \
+ (((o1)->length >= (o2)->length) && \
+ (memcmp((o1)->elements, (o2)->elements, (o2)->length) == 0))
+
/* Ensure we're returning correct creds format */
if ((temp_ret_flags & GSS_C_DELEG_FLAG) &&
tmp_d_cred != GSS_C_NO_CREDENTIAL) {
- gss_union_cred_t d_u_cred = NULL;
-
- d_u_cred = malloc(sizeof (gss_union_cred_desc));
- if (d_u_cred == NULL) {
- status = GSS_S_FAILURE;
- goto error_out;
- }
- (void) memset(d_u_cred, 0,
- sizeof (gss_union_cred_desc));
-
- d_u_cred->count = 1;
+ if (actual_mech != GSS_C_NO_OID &&
+ !g_OID_prefix_equal(actual_mech, token_mech_type)) {
+ *d_cred = tmp_d_cred; /* unwrapped pseudo-mech */
+ } else {
+ gss_union_cred_t d_u_cred = NULL;
- status = generic_gss_copy_oid(&temp_minor_status,
- token_mech_type,
- &d_u_cred->mechs_array);
+ d_u_cred = malloc(sizeof (gss_union_cred_desc));
+ if (d_u_cred == NULL) {
+ status = GSS_S_FAILURE;
+ goto error_out;
+ }
+ (void) memset(d_u_cred, 0, sizeof (gss_union_cred_desc));
- if (status != GSS_S_COMPLETE) {
- free(d_u_cred);
- goto error_out;
- }
+ d_u_cred->count = 1;
- d_u_cred->cred_array = malloc(sizeof (gss_cred_id_t));
- if (d_u_cred->cred_array != NULL) {
- d_u_cred->cred_array[0] = tmp_d_cred;
- } else {
- free(d_u_cred);
- status = GSS_S_FAILURE;
- goto error_out;
- }
+ status = generic_gss_copy_oid(&temp_minor_status,
+ token_mech_type,
+ &d_u_cred->mechs_array);
- internal_name = GSS_C_NO_NAME;
+ if (status != GSS_S_COMPLETE) {
+ free(d_u_cred);
+ goto error_out;
+ }
- d_u_cred->auxinfo.creation_time = time(0);
- d_u_cred->auxinfo.time_rec = 0;
- d_u_cred->loopback = d_u_cred;
+ d_u_cred->cred_array = malloc(sizeof(gss_cred_id_t));
+ if (d_u_cred->cred_array != NULL) {
+ d_u_cred->cred_array[0] = tmp_d_cred;
+ } else {
+ free(d_u_cred);
+ status = GSS_S_FAILURE;
+ goto error_out;
+ }
- if (mech->gss_inquire_cred) {
- status = mech->gss_inquire_cred(minor_status,
- tmp_d_cred,
- &internal_name,
- &d_u_cred->auxinfo.time_rec,
- &d_u_cred->auxinfo.cred_usage,
- NULL);
- if (status != GSS_S_COMPLETE)
- map_error(minor_status, mech);
- }
+ d_u_cred->auxinfo.creation_time = time(0);
+ d_u_cred->auxinfo.time_rec = 0;
+ d_u_cred->loopback = d_u_cred;
+
+ internal_name = GSS_C_NO_NAME;
+
+ if (mech->gss_inquire_cred) {
+ status = mech->gss_inquire_cred(minor_status,
+ tmp_d_cred,
+ &internal_name,
+ &d_u_cred->auxinfo.time_rec,
+ &d_u_cred->auxinfo.cred_usage,
+ NULL);
+ if (status != GSS_S_COMPLETE)
+ map_error(minor_status, mech);
+ }
- if (internal_name != NULL) {
- temp_status = gssint_convert_name_to_union_name(
- &temp_minor_status, mech,
- internal_name, &tmp_src_name);
- if (temp_status != GSS_S_COMPLETE) {
- *minor_status = temp_minor_status;
- map_error(minor_status, mech);
- if (output_token->length)
- (void) gss_release_buffer(
+ if (internal_name != GSS_C_NO_NAME) {
+ /* consumes internal_name regardless of success */
+ temp_status = gssint_convert_name_to_union_name(
+ &temp_minor_status, mech,
+ internal_name, &tmp_src_name);
+ if (temp_status != GSS_S_COMPLETE) {
+ *minor_status = temp_minor_status;
+ map_error(minor_status, mech);
+ if (output_token->length)
+ (void) gss_release_buffer(
+ &temp_minor_status,
+ output_token);
+ (void) gss_release_oid(&temp_minor_status,
+ &actual_mech);
+ free(d_u_cred->cred_array);
+ free(d_u_cred);
+ return (temp_status);
+ }
+
+ if (tmp_src_name != GSS_C_NO_NAME) {
+ status = gss_display_name(
&temp_minor_status,
- output_token);
- free(d_u_cred->cred_array);
- free(d_u_cred);
- return (temp_status);
+ tmp_src_name,
+ &d_u_cred->auxinfo.name,
+ &d_u_cred->auxinfo.name_type);
+ (void) gss_release_name(&temp_minor_status,
+ &tmp_src_name);
+ }
}
- }
- if (tmp_src_name != NULL) {
- status = gss_display_name(
- &temp_minor_status,
- tmp_src_name,
- &d_u_cred->auxinfo.name,
- &d_u_cred->auxinfo.name_type);
+ *d_cred = (gss_cred_id_t)d_u_cred;
}
-
- *d_cred = (gss_cred_id_t)d_u_cred;
}
- if (src_name == NULL && tmp_src_name != NULL)
- (void) gss_release_name(&temp_minor_status,
- &tmp_src_name);
+ if (mech_type != NULL)
+ *mech_type = actual_mech;
+ else
+ (void) gss_release_oid(&temp_minor_status, &actual_mech);
if (ret_flags != NULL)
*ret_flags = temp_ret_flags;
return (status);
/*
* Copyright 1996 by Sun Microsystems, Inc.
- *
+ *
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appears in all copies and
* without specific, written prior permission. Sun Microsystems makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
- *
+ *
* SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
#include <errno.h>
#include <time.h>
-static gss_OID_set
-create_actual_mechs(mechs_array, count)
- const gss_OID mechs_array;
- int count;
-{
- gss_OID_set actual_mechs;
- int i;
- OM_uint32 minor;
-
- actual_mechs = (gss_OID_set) malloc(sizeof(gss_OID_set_desc));
- if (!actual_mechs)
- return NULL;
-
- actual_mechs->elements = (gss_OID)
- malloc(sizeof (gss_OID_desc) * count);
- if (!actual_mechs->elements) {
- free(actual_mechs);
- return NULL;
- }
-
- actual_mechs->count = 0;
-
- for (i = 0; i < count; i++) {
- actual_mechs->elements[i].elements = (void *)
- malloc(mechs_array[i].length);
- if (actual_mechs->elements[i].elements == NULL) {
- (void) gss_release_oid_set(&minor, &actual_mechs);
- return (NULL);
- }
- g_OID_copy(&actual_mechs->elements[i], &mechs_array[i]);
- actual_mechs->count++;
- }
-
- return actual_mechs;
-}
-
static OM_uint32
val_acq_cred_args(
OM_uint32 *minor_status,
mech = gssint_get_mechanism(NULL);
if (mech == NULL)
return (GSS_S_BAD_MECH);
-
+
mechs = &default_OID_set;
default_OID_set.count = 1;
default_OID_set.elements = &default_OID;
* setup the actual mechs output parameter
*/
if (actual_mechs != NULL) {
- if ((*actual_mechs = create_actual_mechs(creds->mechs_array,
- creds->count)) == NULL) {
+ gss_OID_set_desc oids;
+
+ oids.count = creds->count;
+ oids.elements = creds->mechs_array;
+
+ major = generic_gss_copy_oid_set(minor_status, &oids, actual_mechs);
+ if (GSS_ERROR(major)) {
(void) gss_release_cred(minor_status,
(gss_cred_id_t *)&creds);
- *minor_status = 0;
- return (GSS_S_FAILURE);
+ return (major);
}
}
gss_add_cred(minor_status, input_cred_handle,
desired_name, desired_mech, cred_usage,
initiator_time_req, acceptor_time_req,
- output_cred_handle, actual_mechs,
+ output_cred_handle, actual_mechs,
initiator_time_rec, acceptor_time_rec)
OM_uint32 *minor_status;
gss_cred_id_t input_cred_handle;
status = mech->gss_display_name(&temp_minor_status, internal_name,
&union_cred->auxinfo.name,
&union_cred->auxinfo.name_type);
-
+
if (status != GSS_S_COMPLETE)
goto errout;
}
g_OID_copy(&new_mechs_array[union_cred->count],
&mech->mech_type);
- if (actual_mechs) {
- *actual_mechs = create_actual_mechs(new_mechs_array,
- union_cred->count + 1);
- if (*actual_mechs == NULL) {
+ if (actual_mechs != NULL) {
+ gss_OID_set_desc oids;
+
+ oids.count = union_cred->count + 1;
+ oids.elements = new_mechs_array;
+
+ status = generic_gss_copy_oid_set(minor_status, &oids, actual_mechs);
+ if (GSS_ERROR(status)) {
free(new_mechs_array[union_cred->count].elements);
goto errout;
}
--- /dev/null
+/* #pragma ident "@(#)g_acquire_cred.c 1.22 04/02/23 SMI" */
+
+/*
+ * Copyright 2009 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ *
+ */
+/*
+ * Copyright 1996 by Sun Microsystems, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appears in all copies and
+ * that both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of Sun Microsystems not be used
+ * in advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. Sun Microsystems makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+ * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * glue routine for gss_acquire_cred_impersonate_name
+ */
+
+#include "mglueP.h"
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <string.h>
+#include <errno.h>
+#include <time.h>
+
+static OM_uint32
+val_acq_cred_impersonate_name_args(
+ OM_uint32 *minor_status,
+ const gss_cred_id_t impersonator_cred_handle,
+ const gss_name_t desired_name,
+ OM_uint32 time_req,
+ gss_OID_set desired_mechs,
+ gss_cred_usage_t cred_usage,
+ gss_cred_id_t *output_cred_handle,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *time_rec)
+{
+
+ /* Initialize outputs. */
+
+ if (minor_status != NULL)
+ *minor_status = 0;
+
+ if (output_cred_handle != NULL)
+ *output_cred_handle = GSS_C_NO_CREDENTIAL;
+
+ if (actual_mechs != NULL)
+ *actual_mechs = GSS_C_NULL_OID_SET;
+
+ if (time_rec != NULL)
+ *time_rec = 0;
+
+ /* Validate arguments. */
+
+ if (minor_status == NULL)
+ return (GSS_S_CALL_INACCESSIBLE_WRITE);
+
+ if (impersonator_cred_handle == GSS_C_NO_CREDENTIAL)
+ return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_NO_CRED);
+
+ if (desired_name == GSS_C_NO_NAME)
+ return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME);
+
+ if (output_cred_handle == NULL)
+ return (GSS_S_CALL_INACCESSIBLE_WRITE);
+
+ if (cred_usage != GSS_C_ACCEPT
+ && cred_usage != GSS_C_INITIATE
+ && cred_usage != GSS_C_BOTH) {
+ if (minor_status) {
+ *minor_status = EINVAL;
+ map_errcode(minor_status);
+ }
+ return GSS_S_FAILURE;
+ }
+
+ return (GSS_S_COMPLETE);
+}
+
+
+OM_uint32 KRB5_CALLCONV
+gss_acquire_cred_impersonate_name(OM_uint32 *minor_status,
+ const gss_cred_id_t impersonator_cred_handle,
+ const gss_name_t desired_name,
+ OM_uint32 time_req,
+ const gss_OID_set desired_mechs,
+ gss_cred_usage_t cred_usage,
+ gss_cred_id_t *output_cred_handle,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *time_rec)
+{
+ OM_uint32 major = GSS_S_FAILURE;
+ OM_uint32 initTimeOut, acceptTimeOut, outTime = GSS_C_INDEFINITE;
+ gss_OID_set_desc default_OID_set;
+ gss_OID_set mechs;
+ gss_OID_desc default_OID;
+ gss_mechanism mech;
+ unsigned int i;
+ gss_union_cred_t creds;
+
+ major = val_acq_cred_impersonate_name_args(minor_status,
+ impersonator_cred_handle,
+ desired_name,
+ time_req,
+ desired_mechs,
+ cred_usage,
+ output_cred_handle,
+ actual_mechs,
+ time_rec);
+ if (major != GSS_S_COMPLETE)
+ return (major);
+
+ /* Initial value needed below. */
+ major = GSS_S_FAILURE;
+
+ /*
+ * if desired_mechs equals GSS_C_NULL_OID_SET, then pick an
+ * appropriate default. We use the first mechanism in the
+ * mechansim list as the default. This set is created with
+ * statics thus needs not be freed
+ */
+ if(desired_mechs == GSS_C_NULL_OID_SET) {
+ mech = gssint_get_mechanism(NULL);
+ if (mech == NULL)
+ return (GSS_S_BAD_MECH);
+
+ mechs = &default_OID_set;
+ default_OID_set.count = 1;
+ default_OID_set.elements = &default_OID;
+ default_OID.length = mech->mech_type.length;
+ default_OID.elements = mech->mech_type.elements;
+ } else
+ mechs = desired_mechs;
+
+ if (mechs->count == 0)
+ return (GSS_S_BAD_MECH);
+
+ /* allocate the output credential structure */
+ creds = (gss_union_cred_t)malloc(sizeof (gss_union_cred_desc));
+ if (creds == NULL)
+ return (GSS_S_FAILURE);
+
+ /* initialize to 0s */
+ (void) memset(creds, 0, sizeof (gss_union_cred_desc));
+ creds->loopback = creds;
+
+ /* for each requested mech attempt to obtain a credential */
+ for (i = 0; i < mechs->count; i++) {
+ major = gss_add_cred_impersonate_name(minor_status,
+ (gss_cred_id_t)creds,
+ impersonator_cred_handle,
+ desired_name,
+ &mechs->elements[i],
+ cred_usage,
+ time_req,
+ time_req, NULL,
+ NULL,
+ &initTimeOut,
+ &acceptTimeOut);
+ if (major == GSS_S_COMPLETE) {
+ /* update the credential's time */
+ if (cred_usage == GSS_C_ACCEPT) {
+ if (outTime > acceptTimeOut)
+ outTime = acceptTimeOut;
+ } else if (cred_usage == GSS_C_INITIATE) {
+ if (outTime > initTimeOut)
+ outTime = initTimeOut;
+ } else {
+ /*
+ * time_rec is the lesser of the
+ * init/accept times
+ */
+ if (initTimeOut > acceptTimeOut)
+ outTime = (outTime > acceptTimeOut) ?
+ acceptTimeOut : outTime;
+ else
+ outTime = (outTime > initTimeOut) ?
+ initTimeOut : outTime;
+ }
+ }
+ } /* for */
+
+ /* ensure that we have at least one credential element */
+ if (creds->count < 1) {
+ free(creds);
+ return (major);
+ }
+
+ /*
+ * fill in output parameters
+ * setup the actual mechs output parameter
+ */
+ if (actual_mechs != NULL) {
+ gss_OID_set_desc oids;
+
+ oids.count = creds->count;
+ oids.elements = creds->mechs_array;
+
+ major = generic_gss_copy_oid_set(minor_status, &oids, actual_mechs);
+ if (GSS_ERROR(major)) {
+ (void) gss_release_cred(minor_status,
+ (gss_cred_id_t *)&creds);
+ return (major);
+ }
+ }
+
+ if (time_rec)
+ *time_rec = outTime;
+
+
+ creds->loopback = creds;
+ *output_cred_handle = (gss_cred_id_t)creds;
+ return (GSS_S_COMPLETE);
+}
+
+static OM_uint32
+val_add_cred_impersonate_name_args(
+ OM_uint32 *minor_status,
+ gss_cred_id_t input_cred_handle,
+ const gss_cred_id_t impersonator_cred_handle,
+ gss_name_t desired_name,
+ gss_OID desired_mech,
+ gss_cred_usage_t cred_usage,
+ OM_uint32 initiator_time_req,
+ OM_uint32 acceptor_time_req,
+ gss_cred_id_t *output_cred_handle,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *initiator_time_rec,
+ OM_uint32 *acceptor_time_rec)
+{
+
+ /* Initialize outputs. */
+
+ if (minor_status != NULL)
+ *minor_status = 0;
+
+ if (output_cred_handle != NULL)
+ *output_cred_handle = GSS_C_NO_CREDENTIAL;
+
+ if (actual_mechs != NULL)
+ *actual_mechs = GSS_C_NO_OID_SET;
+
+ if (acceptor_time_rec != NULL)
+ *acceptor_time_rec = 0;
+
+ if (initiator_time_rec != NULL)
+ *initiator_time_rec = 0;
+
+ /* Validate arguments. */
+
+ if (minor_status == NULL)
+ return (GSS_S_CALL_INACCESSIBLE_WRITE);
+
+ if (impersonator_cred_handle == GSS_C_NO_CREDENTIAL)
+ return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_NO_CRED);
+
+ if (desired_name == GSS_C_NO_NAME)
+ return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME);
+
+ if (input_cred_handle == GSS_C_NO_CREDENTIAL &&
+ output_cred_handle == NULL)
+ return (GSS_S_CALL_INACCESSIBLE_WRITE | GSS_S_NO_CRED);
+
+ if (cred_usage != GSS_C_ACCEPT
+ && cred_usage != GSS_C_INITIATE
+ && cred_usage != GSS_C_BOTH) {
+ if (minor_status) {
+ *minor_status = EINVAL;
+ map_errcode(minor_status);
+ }
+ return GSS_S_FAILURE;
+ }
+
+ return (GSS_S_COMPLETE);
+}
+
+
+/* V2 KRB5_CALLCONV */
+OM_uint32 KRB5_CALLCONV
+gss_add_cred_impersonate_name(OM_uint32 *minor_status,
+ gss_cred_id_t input_cred_handle,
+ const gss_cred_id_t impersonator_cred_handle,
+ const gss_name_t desired_name,
+ const gss_OID desired_mech,
+ gss_cred_usage_t cred_usage,
+ OM_uint32 initiator_time_req,
+ OM_uint32 acceptor_time_req,
+ gss_cred_id_t *output_cred_handle,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *initiator_time_rec,
+ OM_uint32 *acceptor_time_rec)
+{
+ OM_uint32 status, temp_minor_status;
+ OM_uint32 time_req, time_rec;
+ gss_union_name_t union_name;
+ gss_union_cred_t new_union_cred, union_cred;
+ gss_cred_id_t mech_impersonator_cred;
+ gss_name_t internal_name = GSS_C_NO_NAME;
+ gss_name_t allocated_name = GSS_C_NO_NAME;
+ gss_mechanism mech;
+ gss_cred_id_t cred = NULL;
+ gss_OID new_mechs_array = NULL;
+ gss_cred_id_t * new_cred_array = NULL;
+
+ status = val_add_cred_impersonate_name_args(minor_status,
+ input_cred_handle,
+ impersonator_cred_handle,
+ desired_name,
+ desired_mech,
+ cred_usage,
+ initiator_time_req,
+ acceptor_time_req,
+ output_cred_handle,
+ actual_mechs,
+ initiator_time_rec,
+ acceptor_time_rec);
+ if (status != GSS_S_COMPLETE)
+ return (status);
+
+ mech = gssint_get_mechanism(desired_mech);
+ if (!mech)
+ return GSS_S_BAD_MECH;
+ else if (!mech->gss_acquire_cred)
+ return (GSS_S_UNAVAILABLE);
+
+ if (input_cred_handle == GSS_C_NO_CREDENTIAL) {
+ union_cred = malloc(sizeof (gss_union_cred_desc));
+ if (union_cred == NULL)
+ return (GSS_S_FAILURE);
+
+ (void) memset(union_cred, 0, sizeof (gss_union_cred_desc));
+
+ /* for default credentials we will use GSS_C_NO_NAME */
+ internal_name = GSS_C_NO_NAME;
+ } else {
+ union_cred = (gss_union_cred_t)input_cred_handle;
+ if (gssint_get_mechanism_cred(union_cred, desired_mech) !=
+ GSS_C_NO_CREDENTIAL)
+ return (GSS_S_DUPLICATE_ELEMENT);
+ }
+
+ mech_impersonator_cred =
+ gssint_get_mechanism_cred((gss_union_cred_t)impersonator_cred_handle,
+ desired_mech);
+ if (mech_impersonator_cred == GSS_C_NO_CREDENTIAL)
+ return (GSS_S_NO_CRED);
+
+ /* may need to create a mechanism specific name */
+ union_name = (gss_union_name_t)desired_name;
+ if (union_name->mech_type &&
+ g_OID_equal(union_name->mech_type,
+ &mech->mech_type))
+ internal_name = union_name->mech_name;
+ else {
+ if (gssint_import_internal_name(minor_status,
+ &mech->mech_type, union_name,
+ &allocated_name) != GSS_S_COMPLETE)
+ return (GSS_S_BAD_NAME);
+ internal_name = allocated_name;
+ }
+
+ if (cred_usage == GSS_C_ACCEPT)
+ time_req = acceptor_time_req;
+ else if (cred_usage == GSS_C_INITIATE)
+ time_req = initiator_time_req;
+ else if (cred_usage == GSS_C_BOTH)
+ time_req = (acceptor_time_req > initiator_time_req) ?
+ acceptor_time_req : initiator_time_req;
+ else
+ time_req = 0;
+
+ status = mech->gss_acquire_cred_impersonate_name(minor_status,
+ mech_impersonator_cred,
+ internal_name,
+ time_req,
+ GSS_C_NULL_OID_SET,
+ cred_usage,
+ &cred,
+ NULL,
+ &time_rec);
+ if (status != GSS_S_COMPLETE) {
+ map_error(minor_status, mech);
+ goto errout;
+ }
+
+ /* may need to set credential auxinfo strucutre */
+ if (union_cred->auxinfo.creation_time == 0) {
+ union_cred->auxinfo.creation_time = time(NULL);
+ union_cred->auxinfo.time_rec = time_rec;
+ union_cred->auxinfo.cred_usage = cred_usage;
+
+ /*
+ * we must set the name; if name is not supplied
+ * we must do inquire cred to get it
+ */
+ if (internal_name == NULL) {
+ if (mech->gss_inquire_cred == NULL ||
+ ((status = mech->gss_inquire_cred(
+ &temp_minor_status, cred,
+ &allocated_name, NULL, NULL,
+ NULL)) != GSS_S_COMPLETE))
+ goto errout;
+ internal_name = allocated_name;
+ }
+
+ if (internal_name != GSS_C_NO_NAME) {
+ status = mech->gss_display_name(&temp_minor_status, internal_name,
+ &union_cred->auxinfo.name,
+ &union_cred->auxinfo.name_type);
+
+ if (status != GSS_S_COMPLETE)
+ goto errout;
+ }
+ }
+
+ /* now add the new credential elements */
+ new_mechs_array = (gss_OID)
+ malloc(sizeof (gss_OID_desc) * (union_cred->count+1));
+
+ new_cred_array = (gss_cred_id_t *)
+ malloc(sizeof (gss_cred_id_t) * (union_cred->count+1));
+
+ if (!new_mechs_array || !new_cred_array) {
+ status = GSS_S_FAILURE;
+ goto errout;
+ }
+
+ if (acceptor_time_rec)
+ if (cred_usage == GSS_C_ACCEPT || cred_usage == GSS_C_BOTH)
+ *acceptor_time_rec = time_rec;
+ if (initiator_time_rec)
+ if (cred_usage == GSS_C_INITIATE || cred_usage == GSS_C_BOTH)
+ *initiator_time_rec = time_rec;
+
+ /*
+ * OK, expand the mechanism array and the credential array
+ */
+ (void) memcpy(new_mechs_array, union_cred->mechs_array,
+ sizeof (gss_OID_desc) * union_cred->count);
+ (void) memcpy(new_cred_array, union_cred->cred_array,
+ sizeof (gss_cred_id_t) * union_cred->count);
+
+ new_cred_array[union_cred->count] = cred;
+ if ((new_mechs_array[union_cred->count].elements =
+ malloc(mech->mech_type.length)) == NULL)
+ goto errout;
+
+ g_OID_copy(&new_mechs_array[union_cred->count],
+ &mech->mech_type);
+
+ if (actual_mechs != NULL) {
+ gss_OID_set_desc oids;
+
+ oids.count = union_cred->count + 1;
+ oids.elements = new_mechs_array;
+
+ status = generic_gss_copy_oid_set(minor_status, &oids, actual_mechs);
+ if (GSS_ERROR(status)) {
+ free(new_mechs_array[union_cred->count].elements);
+ goto errout;
+ }
+ }
+
+ if (output_cred_handle == NULL) {
+ free(union_cred->mechs_array);
+ free(union_cred->cred_array);
+ new_union_cred = union_cred;
+ } else {
+ new_union_cred = malloc(sizeof (gss_union_cred_desc));
+ if (new_union_cred == NULL) {
+ free(new_mechs_array[union_cred->count].elements);
+ goto errout;
+ }
+ *new_union_cred = *union_cred;
+ *output_cred_handle = (gss_cred_id_t)new_union_cred;
+ }
+
+ new_union_cred->mechs_array = new_mechs_array;
+ new_union_cred->cred_array = new_cred_array;
+ new_union_cred->count++;
+ new_union_cred->loopback = new_union_cred;
+
+ /* We're done with the internal name. Free it if we allocated it. */
+
+ if (allocated_name)
+ (void) gssint_release_internal_name(&temp_minor_status,
+ &mech->mech_type,
+ &allocated_name);
+
+ return (GSS_S_COMPLETE);
+
+errout:
+ if (new_mechs_array)
+ free(new_mechs_array);
+ if (new_cred_array)
+ free(new_cred_array);
+
+ if (cred != NULL && mech->gss_release_cred)
+ mech->gss_release_cred(&temp_minor_status, &cred);
+
+ if (allocated_name)
+ (void) gssint_release_internal_name(&temp_minor_status,
+ &mech->mech_type,
+ &allocated_name);
+
+ if (input_cred_handle == GSS_C_NO_CREDENTIAL && union_cred) {
+ if (union_cred->auxinfo.name.value)
+ free(union_cred->auxinfo.name.value);
+ free(union_cred);
+ }
+
+ return (status);
+}
if (union_cred == GSS_C_NO_CREDENTIAL)
return GSS_C_NO_CREDENTIAL;
- /* SPNEGO mechanism will again call into GSSAPI */
- if (g_OID_equal(&gss_spnego_mechanism_oid_desc, mech_type))
- return (gss_cred_id_t)union_cred;
-
for (i=0; i < union_cred->count; i++) {
if (g_OID_equal(mech_type, &union_cred->mechs_array[i]))
return union_cred->cred_array[i];
-
- /* for SPNEGO, check the next-lower set of creds */
- if (g_OID_equal(&gss_spnego_mechanism_oid_desc, &union_cred->mechs_array[i])) {
- gss_union_cred_t candidate_cred;
- gss_cred_id_t sub_cred;
-
- candidate_cred = (gss_union_cred_t)union_cred->cred_array[i];
- sub_cred = gssint_get_mechanism_cred(candidate_cred, mech_type);
-
- if(sub_cred != GSS_C_NO_CREDENTIAL)
- return sub_cred;
- }
}
return GSS_C_NO_CREDENTIAL;
}
GSS_ADD_DYNAMIC_METHOD(dl, mech, gss_unwrap_iov);
GSS_ADD_DYNAMIC_METHOD(dl, mech, gss_wrap_iov_length);
GSS_ADD_DYNAMIC_METHOD(dl, mech, gss_complete_auth_token);
+ /* New for 1.8 */
+ GSS_ADD_DYNAMIC_METHOD(dl, mech, gss_acquire_cred_impersonate_name);
+ GSS_ADD_DYNAMIC_METHOD(dl, mech, gss_add_cred_impersonate_name);
assert(mech_type != GSS_C_NO_OID);
}
status = mech->gss_set_sec_context_option(minor_status,
- ctx ? &internal_ctx :
- &ctx->internal_ctx_id,
+ ctx ? &ctx->internal_ctx_id :
+ &internal_ctx,
desired_object,
value);
if (status == GSS_S_COMPLETE) {
gss_buffer_t /* input_message_buffer */
);
+ /* New for 1.8 */
+
+ OM_uint32 (*gss_acquire_cred_impersonate_name)
+ (
+ OM_uint32 *, /* minor_status */
+ const gss_cred_id_t, /* impersonator_cred_handle */
+ const gss_name_t, /* desired_name */
+ OM_uint32, /* time_req */
+ const gss_OID_set, /* desired_mechs */
+ gss_cred_usage_t, /* cred_usage */
+ gss_cred_id_t *, /* output_cred_handle */
+ gss_OID_set *, /* actual_mechs */
+ OM_uint32 * /* time_rec */
+ /* */);
+
+ OM_uint32 (*gss_add_cred_impersonate_name)
+ (
+ OM_uint32 *, /* minor_status */
+ gss_cred_id_t, /* input_cred_handle */
+ const gss_cred_id_t, /* impersonator_cred_handle */
+ const gss_name_t, /* desired_name */
+ const gss_OID, /* desired_mech */
+ gss_cred_usage_t, /* cred_usage */
+ OM_uint32, /* initiator_time_req */
+ OM_uint32, /* acceptor_time_req */
+ gss_cred_id_t *, /* output_cred_handle */
+ gss_OID_set *, /* actual_mechs */
+ OM_uint32 *, /* initiator_time_rec */
+ OM_uint32 * /* acceptor_time_rec */
+ /* */);
+
} *gss_mechanism;
/* This structure MUST NOT be used by any code outside libgss */
gss_name_t * /* input_name */
);
+OM_uint32 spnego_gss_inquire_cred
+(
+ OM_uint32 *, /* minor_status */
+ gss_cred_id_t, /* cred_handle */
+ gss_name_t *, /* name */
+ OM_uint32 *, /* lifetime */
+ int *, /* cred_usage */
+ gss_OID_set * /* mechanisms */
+);
+
OM_uint32 spnego_gss_inquire_names_for_mech
(
OM_uint32 *, /* minor_status */
gss_buffer_set_t *data_set
);
+OM_uint32
+spnego_gss_inquire_cred_by_oid
+(
+ OM_uint32 *minor_status,
+ const gss_cred_id_t cred_handle,
+ const gss_OID desired_object,
+ gss_buffer_set_t *data_set
+);
+
OM_uint32
spnego_gss_set_sec_context_option
(
gss_buffer_t input_message_buffer
);
+OM_uint32
+spnego_gss_acquire_cred_impersonate_name(
+ OM_uint32 *, /* minor_status */
+ const gss_cred_id_t, /* impersonator_cred_handle */
+ const gss_name_t, /* desired_name */
+ OM_uint32, /* time_req */
+ const gss_OID_set, /* desired_mechs */
+ gss_cred_usage_t, /* cred_usage */
+ gss_cred_id_t *, /* output_cred_handle */
+ gss_OID_set *, /* actual_mechs */
+ OM_uint32 *); /* time_rec */
+
#ifdef __cplusplus
}
#endif
spnego_gss_display_name,
spnego_gss_import_name,
spnego_gss_release_name,
- NULL, /* gss_inquire_cred */
+ spnego_gss_inquire_cred, /* gss_inquire_cred */
NULL, /* gss_add_cred */
#ifndef LEAN_CLIENT
spnego_gss_export_sec_context, /* gss_export_sec_context */
NULL, /* gss_export_name */
NULL, /* gss_store_cred */
spnego_gss_inquire_sec_context_by_oid, /* gss_inquire_sec_context_by_oid */
- NULL, /* gss_inquire_cred_by_oid */
+ spnego_gss_inquire_cred_by_oid, /* gss_inquire_cred_by_oid */
spnego_gss_set_sec_context_option, /* gss_set_sec_context_option */
NULL, /* gssspi_set_cred_option */
NULL, /* gssspi_mech_invoke */
spnego_gss_wrap_iov,
spnego_gss_unwrap_iov,
spnego_gss_wrap_iov_length,
- spnego_gss_complete_auth_token
+ spnego_gss_complete_auth_token,
+ spnego_gss_acquire_cred_impersonate_name,
+ NULL, /* gss_add_cred_impersonate_name */
};
#ifdef _GSS_STATIC_LINK
return (status);
}
+OM_uint32
+spnego_gss_inquire_cred(
+ OM_uint32 *minor_status,
+ gss_cred_id_t cred_handle,
+ gss_name_t *name,
+ OM_uint32 *lifetime,
+ int *cred_usage,
+ gss_OID_set *mechanisms)
+{
+ OM_uint32 status;
+ gss_cred_id_t creds = GSS_C_NO_CREDENTIAL;
+ OM_uint32 tmp_minor_status;
+ OM_uint32 initiator_lifetime, acceptor_lifetime;
+
+ dsyslog("Entering inquire_cred\n");
+
+ /*
+ * To avoid infinite recursion, if GSS_C_NO_CREDENTIAL is
+ * supplied we call gss_inquire_cred_by_mech() on the
+ * first non-SPNEGO mechanism.
+ */
+ if (cred_handle == GSS_C_NO_CREDENTIAL) {
+ status = get_available_mechs(minor_status,
+ GSS_C_NO_NAME,
+ GSS_C_BOTH,
+ &creds,
+ mechanisms);
+ if (status != GSS_S_COMPLETE) {
+ dsyslog("Leaving inquire_cred\n");
+ return (status);
+ }
+
+ if ((*mechanisms)->count == 0) {
+ gss_release_cred(&tmp_minor_status, &creds);
+ gss_release_oid_set(&tmp_minor_status, mechanisms);
+ dsyslog("Leaving inquire_cred\n");
+ return (GSS_S_DEFECTIVE_CREDENTIAL);
+ }
+
+ assert((*mechanisms)->elements != NULL);
+
+ status = gss_inquire_cred_by_mech(minor_status,
+ creds,
+ &(*mechanisms)->elements[0],
+ name,
+ &initiator_lifetime,
+ &acceptor_lifetime,
+ cred_usage);
+ if (status != GSS_S_COMPLETE) {
+ gss_release_cred(&tmp_minor_status, &creds);
+ dsyslog("Leaving inquire_cred\n");
+ return (status);
+ }
+
+ if (lifetime != NULL)
+ *lifetime = (*cred_usage == GSS_C_ACCEPT) ?
+ acceptor_lifetime : initiator_lifetime;
+
+ gss_release_cred(&tmp_minor_status, &creds);
+ } else {
+ status = gss_inquire_cred(minor_status, cred_handle,
+ name, lifetime,
+ cred_usage, mechanisms);
+ }
+
+ dsyslog("Leaving inquire_cred\n");
+
+ return (status);
+}
+
/*ARGSUSED*/
OM_uint32
spnego_gss_compare_name(
*/
if (*ctx != NULL &&
(*ctx)->magic_num == SPNEGO_MAGIC_ID) {
+ (void) gss_delete_sec_context(minor_status,
+ &(*ctx)->ctx_handle,
+ output_token);
(void) release_spnego_ctx(ctx);
} else {
ret = gss_delete_sec_context(minor_status,
return (ret);
}
+OM_uint32
+spnego_gss_inquire_cred_by_oid(
+ OM_uint32 *minor_status,
+ const gss_cred_id_t cred_handle,
+ const gss_OID desired_object,
+ gss_buffer_set_t *data_set)
+{
+ OM_uint32 ret;
+ ret = gss_inquire_cred_by_oid(minor_status,
+ cred_handle,
+ desired_object,
+ data_set);
+ return (ret);
+}
+
OM_uint32
spnego_gss_set_sec_context_option(
OM_uint32 *minor_status,
return (ret);
}
+OM_uint32
+spnego_gss_acquire_cred_impersonate_name(OM_uint32 *minor_status,
+ const gss_cred_id_t impersonator_cred_handle,
+ gss_name_t desired_name,
+ OM_uint32 time_req,
+ gss_OID_set desired_mechs,
+ gss_cred_usage_t cred_usage,
+ gss_cred_id_t *output_cred_handle,
+ gss_OID_set *actual_mechs,
+ OM_uint32 *time_rec)
+{
+ OM_uint32 status;
+ gss_OID_set amechs = GSS_C_NULL_OID_SET;
+
+ dsyslog("Entering spnego_gss_acquire_cred_impersonate_name\n");
+
+ if (actual_mechs)
+ *actual_mechs = NULL;
+
+ if (time_rec)
+ *time_rec = 0;
+
+ if (desired_mechs == GSS_C_NO_OID_SET) {
+ status = gss_inquire_cred(minor_status,
+ impersonator_cred_handle,
+ NULL, NULL,
+ NULL, &amechs);
+ if (status != GSS_S_COMPLETE)
+ return status;
+
+ desired_mechs = amechs;
+ }
+
+ status = gss_acquire_cred_impersonate_name(minor_status,
+ impersonator_cred_handle,
+ desired_name, time_req,
+ desired_mechs, cred_usage,
+ output_cred_handle, actual_mechs,
+ time_rec);
+
+ if (amechs != GSS_C_NULL_OID_SET)
+ (void) gss_release_oid_set(minor_status, &amechs);
+
+ dsyslog("Leaving spnego_gss_acquire_cred_impersonate_name\n");
+ return (status);
+}
+
/*
* We will release everything but the ctx_handle so that it
* can be passed back to init/accept context. This routine should
static const char flags_service_in[] = "service";
static const char flags_pwsvc_in[] = "pwservice";
static const char flags_md5_in[] = "md5";
+static const char flags_ok_to_auth_as_delegate_in[] = "ok-to-auth-as-delegate";
+static const char flags_no_auth_data_required_in[] = "no-auth-data-required";
static const char flags_pdate_out[] = "Not Postdateable";
static const char flags_fwd_out[] = "Not Forwardable";
static const char flags_tgtbased_out[] = "No TGT-based requests";
static const char flags_proxy_out[] = "Not proxiable";
static const char flags_dup_skey_out[] = "No DUP_SKEY requests";
static const char flags_tickets_out[] = "All Tickets Disallowed";
-static const char flags_preauth_out[] = "Preauthorization required";
-static const char flags_hwauth_out[] = "HW Authorization required";
+static const char flags_preauth_out[] = "Preauthentication required";
+static const char flags_hwauth_out[] = "HW authentication required";
static const char flags_ok_as_delegate_out[] = "OK as Delegate";
static const char flags_pwchange_out[] = "Password Change required";
static const char flags_service_out[] = "Service Disabled";
static const char flags_pwsvc_out[] = "Password Changing Service";
static const char flags_md5_out[] = "RSA-MD5 supported";
+static const char flags_ok_to_auth_as_delegate_out[] = "Protocol transition with delegation allowed";
+static const char flags_no_auth_data_required_out[] = "No authorization data required";
static const char flags_default_neg[] = "-";
static const char flags_default_sep[] = " ";
{ KRB5_KDB_REQUIRES_PWCHANGE, 1, flags_pwchange_in, flags_pwchange_out},
{ KRB5_KDB_DISALLOW_SVR, 0, flags_service_in, flags_service_out },
{ KRB5_KDB_PWCHANGE_SERVICE, 1, flags_pwsvc_in, flags_pwsvc_out },
-{ KRB5_KDB_SUPPORT_DESMD5, 1, flags_md5_in, flags_md5_out }
+{ KRB5_KDB_SUPPORT_DESMD5, 1, flags_md5_in, flags_md5_out },
+{ KRB5_KDB_OK_TO_AUTH_AS_DELEGATE, 1, flags_ok_to_auth_as_delegate_in, flags_ok_to_auth_as_delegate_out },
+{ KRB5_KDB_NO_AUTH_DATA_REQUIRED, 1, flags_no_auth_data_required_in, flags_no_auth_data_required_out }
};
static const int flags_table_nents = sizeof(flags_table)/
sizeof(flags_table[0]);
return retval;
}
+asn1_error_code asn1_decode_s4u_userid(asn1buf *buf, krb5_s4u_userid *val)
+{
+ setup();
+ val->nonce = 0;
+ val->user = NULL;
+ val->subject_cert.data = NULL;
+ val->options = 0;
+ { begin_structure();
+ get_field(val->nonce,0,asn1_decode_int32);
+ alloc_principal(val->user);
+ opt_field(val->user,1,asn1_decode_principal_name,0);
+ get_field(val->user,2,asn1_decode_realm);
+ opt_lenfield(val->subject_cert.length,val->subject_cert.data,3,asn1_decode_charstring);
+ opt_field(val->options,4,asn1_decode_krb5_flags,0);
+ end_structure();
+ }
+ return 0;
+error_out:
+ krb5_free_principal(NULL, val->user);
+ krb5_free_data_contents(NULL, &val->subject_cert);
+ val->user = NULL;
+ val->subject_cert.data = NULL;
+ return retval;
+}
+
+asn1_error_code asn1_decode_pa_s4u_x509_user(asn1buf *buf, krb5_pa_s4u_x509_user *val)
+{
+ setup();
+ val->cksum.contents = NULL;
+ { begin_structure();
+ get_field(val->user_id,0,asn1_decode_s4u_userid);
+ get_field(val->cksum,1,asn1_decode_checksum);
+ end_structure();
+ }
+ return 0;
+error_out:
+ krb5_free_s4u_userid_contents(NULL, &val->user_id);
+ krb5_free_checksum_contents(NULL, &val->cksum);
+ return retval;
+}
+
asn1_error_code asn1_decode_pa_pac_req(asn1buf *buf, krb5_pa_pac_req *val)
{
setup();
(asn1buf *buf, krb5_data *rep, krb5_principal *principal);
asn1_error_code asn1_decode_pa_for_user
(asn1buf *buf, krb5_pa_for_user *val);
+asn1_error_code asn1_decode_s4u_userid
+ (asn1buf *buf, krb5_s4u_userid *val);
+asn1_error_code asn1_decode_pa_s4u_x509_user
+ (asn1buf *buf, krb5_pa_s4u_x509_user *val);
asn1_error_code asn1_decode_pa_pac_req
(asn1buf *buf, krb5_pa_pac_req *val);
optional |= (1u << 8);
if (val->caddrs != NULL && val->caddrs[0] != NULL)
optional |= (1u << 11);
+ if (val->enc_padata != NULL)
+ optional |= (1u << 12);
return optional;
}
DEFSEQTYPE(pa_for_user, krb5_pa_for_user, pa_for_user_fields, 0);
+/* [MS-SFU] Section 2.2.2. */
+static const struct field_info s4u_userid_fields[] = {
+ FIELDOF_NORM(krb5_s4u_userid, int32, nonce, 0),
+ FIELDOF_OPT(krb5_s4u_userid, principal, user, 1, 1),
+ FIELDOF_NORM(krb5_s4u_userid, realm_of_principal, user, 2),
+ FIELDOF_OPT(krb5_s4u_userid, ostring_data, subject_cert, 3, 3),
+ FIELDOF_OPT(krb5_s4u_userid, krb5_flags, options, 4, 4),
+};
+
+static unsigned int s4u_userid_optional (const void *p) {
+ const krb5_s4u_userid *val = p;
+ unsigned int optional = 0;
+ if (val->user != NULL && val->user->length != 0)
+ optional |= (1u)<<1;
+ if (val->subject_cert.length != 0)
+ optional |= (1u)<<3;
+ if (val->options != 0)
+ optional |= (1u)<<4;
+ return optional;
+}
+
+DEFSEQTYPE(s4u_userid, krb5_s4u_userid, s4u_userid_fields, s4u_userid_optional);
+
+static const struct field_info pa_s4u_x509_user_fields[] = {
+ FIELDOF_NORM(krb5_pa_s4u_x509_user, s4u_userid, user_id, 0),
+ FIELDOF_NORM(krb5_pa_s4u_x509_user, checksum, cksum, 1),
+};
+
+DEFSEQTYPE(pa_s4u_x509_user, krb5_pa_s4u_x509_user, pa_s4u_x509_user_fields, 0);
+
/* draft-ietf-krb-wg-kerberos-referrals Appendix A. */
static const struct field_info pa_svr_referral_data_fields[] = {
FIELDOF_NORM(krb5_pa_svr_referral_data, realm_of_principal, principal, 0),
predicted_sam_response);
MAKE_FULL_ENCODER(encode_krb5_setpw_req, setpw_req);
MAKE_FULL_ENCODER(encode_krb5_pa_for_user, pa_for_user);
+MAKE_FULL_ENCODER(encode_krb5_s4u_userid, s4u_userid);
+MAKE_FULL_ENCODER(encode_krb5_pa_s4u_x509_user, pa_s4u_x509_user);
MAKE_FULL_ENCODER(encode_krb5_pa_svr_referral_data, pa_svr_referral_data);
MAKE_FULL_ENCODER(encode_krb5_pa_server_referral_data, pa_server_referral_data);
MAKE_FULL_ENCODER(encode_krb5_etype_list, etype_list);
cleanup(free);
}
+krb5_error_code
+decode_krb5_pa_s4u_x509_user(const krb5_data *code, krb5_pa_s4u_x509_user **repptr)
+{
+ setup_buf_only(krb5_pa_s4u_x509_user *);
+ alloc_field(rep);
+
+ retval = asn1_decode_pa_s4u_x509_user(&buf, rep);
+ if (retval) clean_return(retval);
+
+ cleanup(free);
+}
+
krb5_error_code
decode_krb5_pa_pac_req(const krb5_data *code, krb5_pa_pac_req **repptr)
{
rd_req_dec.o \
rd_safe.o \
recvauth.o \
+ s4u_creds.o \
sendauth.o \
send_tgs.o \
ser_actx.o \
$(OUTPRE)rd_req_dec.$(OBJEXT) \
$(OUTPRE)rd_safe.$(OBJEXT) \
$(OUTPRE)recvauth.$(OBJEXT) \
+ $(OUTPRE)s4u_creds.$(OBJEXT) \
$(OUTPRE)sendauth.$(OBJEXT) \
$(OUTPRE)send_tgs.$(OBJEXT) \
$(OUTPRE)ser_actx.$(OBJEXT) \
$(srcdir)/rd_req_dec.c \
$(srcdir)/rd_safe.c \
$(srcdir)/recvauth.c \
+ $(srcdir)/s4u_creds.c \
$(srcdir)/sendauth.c \
$(srcdir)/send_tgs.c \
$(srcdir)/ser_actx.c \
DUMP_PRINC("gc_from_kdc: server as requested", supplied_server);
+ if (in_cred->second_ticket.length != 0 &&
+ (kdcopt & KDC_OPT_CNAME_IN_ADDL_TKT) == 0) {
+ kdcopt |= KDC_OPT_ENC_TKT_IN_SKEY;
+ }
+
/*
* Try requesting a service ticket from our local KDC with referrals
* turned on. If the first referral succeeds, follow a referral-only
retval = krb5_get_cred_via_tkt(context, tgtptr,
KDC_OPT_CANONICALIZE |
FLAGS2OPTS(tgtptr->ticket_flags) |
- kdcopt |
- (in_cred->second_ticket.length ?
- KDC_OPT_ENC_TKT_IN_SKEY : 0),
+ kdcopt,
tgtptr->addresses, in_cred, out_cred);
if (retval) {
DPRINTF(("gc_from_kdc: referral TGS-REQ request failed: <%s>\n",
"retrying without option.\n", referral_count + 1));
retval = krb5_get_cred_via_tkt(context, tgtptr,
FLAGS2OPTS(tgtptr->ticket_flags) |
- kdcopt |
- (in_cred->second_ticket.length ?
- KDC_OPT_ENC_TKT_IN_SKEY : 0),
+ kdcopt,
tgtptr->addresses,
in_cred, out_cred);
/* Whether or not that succeeded, we're done. */
retval = krb5_get_cred_via_tkt(context, tgtptr,
KDC_OPT_CANONICALIZE |
FLAGS2OPTS(tgtptr->ticket_flags) |
- kdcopt |
- (in_cred->second_ticket.length ?
- KDC_OPT_ENC_TKT_IN_SKEY : 0),
+ kdcopt,
tgtptr->addresses,
in_cred, out_cred);
goto cleanup;
context->use_conf_ktypes = old_use_conf_ktypes;
retval = krb5_get_cred_via_tkt(context, tgtptr,
FLAGS2OPTS(tgtptr->ticket_flags) |
- kdcopt |
- (in_cred->second_ticket.length ?
- KDC_OPT_ENC_TKT_IN_SKEY : 0),
+ kdcopt,
tgtptr->addresses, in_cred, out_cred);
cleanup:
/*
* lib/krb5/krb/gc_via_tgt.c
*
- * Copyright 1990,1991,2007,2008 by the Massachusetts Institute of Technology.
+ * Copyright 1990,1991,2007-2009 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
krb5_get_cred_via_tkt (krb5_context context, krb5_creds *tkt,
krb5_flags kdcoptions, krb5_address *const *address,
krb5_creds *in_cred, krb5_creds **out_cred)
+{
+ return krb5_get_cred_via_tkt_ext (context, tkt,
+ kdcoptions, address,
+ NULL, in_cred, NULL, NULL,
+ NULL, NULL, out_cred, NULL);
+}
+
+krb5_error_code
+krb5_get_cred_via_tkt_ext (krb5_context context, krb5_creds *tkt,
+ krb5_flags kdcoptions, krb5_address *const *address,
+ krb5_pa_data **in_padata,
+ krb5_creds *in_cred,
+ krb5_error_code (*pacb_fct)(krb5_context,
+ krb5_keyblock *,
+ krb5_kdc_req *,
+ void *),
+ void *pacb_data,
+ krb5_pa_data ***out_padata,
+ krb5_pa_data ***out_enc_padata,
+ krb5_creds **out_cred,
+ krb5_keyblock **out_subkey)
{
krb5_error_code retval;
krb5_kdc_rep *dec_rep;
krb5_response tgsrep;
krb5_enctype *enctypes = 0;
krb5_keyblock *subkey = NULL;
+ krb5_boolean s4u2self = FALSE, second_tkt;
#ifdef DEBUG_REFERRALS
printf("krb5_get_cred_via_tkt starting; referral flag is %s\n", kdcoptions&KDC_OPT_CANONICALIZE?"on":"off");
if (!tkt->ticket.length)
return KRB5_NO_TKT_SUPPLIED;
- if ((kdcoptions & KDC_OPT_ENC_TKT_IN_SKEY) &&
- (!in_cred->second_ticket.length))
+ second_tkt = ((kdcoptions & (KDC_OPT_ENC_TKT_IN_SKEY | KDC_OPT_CNAME_IN_ADDL_TKT)) != 0);
+
+ if (second_tkt && !in_cred->second_ticket.length)
return(KRB5_NO_2ND_TKT);
+ s4u2self = krb5int_find_pa_data(context, in_padata, KRB5_PADATA_S4U_X509_USER) ||
+ krb5int_find_pa_data(context, in_padata, KRB5_PADATA_FOR_USER);
/* check if we have the right TGT */
/* tkt->server must be equal to */
enctypes[0] = in_cred->keyblock.enctype;
enctypes[1] = 0;
}
-
+
retval = krb5int_send_tgs(context, kdcoptions, &in_cred->times, enctypes,
in_cred->server, address, in_cred->authdata,
- 0, /* no padata */
- (kdcoptions & KDC_OPT_ENC_TKT_IN_SKEY) ?
- &in_cred->second_ticket : NULL,
- tkt, &tgsrep, &subkey);
+ in_padata,
+ second_tkt ? &in_cred->second_ticket : NULL,
+ tkt, pacb_fct, pacb_data, &tgsrep, &subkey);
if (enctypes)
free(enctypes);
if (retval) {
/* make sure the response hasn't been tampered with..... */
retval = 0;
- if (!krb5_principal_compare(context, dec_rep->client, tkt->client))
- retval = KRB5_KDCREP_MODIFIED;
+ if (s4u2self && !IS_TGS_PRINC(context, dec_rep->ticket->server)) {
+ /* Final hop, check whether KDC supports S4U2Self */
+ if (krb5_principal_compare(context, dec_rep->client, in_cred->server))
+ retval = KRB5KDC_ERR_PADATA_TYPE_NOSUPP;
+ } else if ((kdcoptions & KDC_OPT_CNAME_IN_ADDL_TKT) == 0) {
+ /* XXX for constrained delegation this check must be performed by caller
+ * as we don't have access to the key to decrypt the evidence ticket.
+ */
+ if (!krb5_principal_compare(context, dec_rep->client, tkt->client))
+ retval = KRB5_KDCREP_MODIFIED;
+ }
if (retval == 0)
retval = check_reply_server(context, kdcoptions, in_cred, dec_rep);
retval = KRB5_KDCREP_SKEW;
goto error_3;
}
+
+ if (out_padata != NULL) {
+ *out_padata = dec_rep->padata;
+ dec_rep->padata = NULL;
+ }
+ if (out_enc_padata != NULL) {
+ *out_enc_padata = dec_rep->enc_part2->enc_padata;
+ dec_rep->enc_part2->enc_padata = NULL;
+ }
retval = krb5_kdcrep2creds(context, dec_rep, address,
&in_cred->second_ticket, out_cred);
error_3:;
- if (subkey != NULL)
- krb5_free_keyblock(context, subkey);
+ if (subkey != NULL) {
+ if (retval == 0 && out_subkey != NULL)
+ *out_subkey = subkey;
+ else
+ krb5_free_keyblock(context, subkey);
+ }
memset(dec_rep->enc_part2->session->contents, 0,
dec_rep->enc_part2->session->length);
#include "k5-int.h"
#include "int-proto.h"
-static krb5_error_code
+krb5_error_code
krb5_get_credentials_core(krb5_context context, krb5_flags options,
krb5_creds *in_creds, krb5_creds *mcreds,
krb5_flags *fields)
if (ret)
return ret;
}
- if (options & KRB5_GC_USER_USER) {
+ if (options & (KRB5_GC_USER_USER | KRB5_GC_CONSTRAINED_DELEGATION)) {
/* also match on identical 2nd tkt and tkt encrypted in a
session key */
- *fields |= KRB5_TC_MATCH_2ND_TKT|KRB5_TC_MATCH_IS_SKEY;
- mcreds->is_skey = TRUE;
+ *fields |= KRB5_TC_MATCH_2ND_TKT;
+ if (options & KRB5_GC_USER_USER) {
+ *fields |= KRB5_TC_MATCH_IS_SKEY;
+ mcreds->is_skey = TRUE;
+ }
mcreds->second_ticket = in_creds->second_ticket;
if (!in_creds->second_ticket.length)
return KRB5_NO_2ND_TKT;
int not_ktype;
int kdcopt = 0;
- retval = krb5_get_credentials_core(context, options,
- in_creds,
- &mcreds, &fields);
+ if ((options & KRB5_GC_CONSTRAINED_DELEGATION) == 0) {
+ retval = krb5_get_credentials_core(context, options,
+ in_creds,
+ &mcreds, &fields);
- if (retval) return retval;
+ if (retval)
+ return retval;
- if ((ncreds = (krb5_creds *)malloc(sizeof(krb5_creds))) == NULL)
- return ENOMEM;
+ if ((ncreds = (krb5_creds *)malloc(sizeof(krb5_creds))) == NULL)
+ return ENOMEM;
- memset(ncreds, 0, sizeof(krb5_creds));
- ncreds->magic = KV5M_CREDS;
+ memset(ncreds, 0, sizeof(krb5_creds));
+ ncreds->magic = KV5M_CREDS;
- /* The caller is now responsible for cleaning up in_creds */
- if ((retval = krb5_cc_retrieve_cred(context, ccache, fields, &mcreds,
- ncreds))) {
- free(ncreds);
- ncreds = in_creds;
+ /* The caller is now responsible for cleaning up in_creds */
+ if ((retval = krb5_cc_retrieve_cred(context, ccache, fields, &mcreds,
+ ncreds))) {
+ free(ncreds);
+ ncreds = in_creds;
+ } else {
+ *out_creds = ncreds;
+ }
} else {
- *out_creds = ncreds;
+ /*
+ * To do this usefully for constrained delegation, we would
+ * need to look inside second_ticket, which we can't do.
+ */
+ ncreds = in_creds;
+ retval = KRB5_CC_NOTFOUND;
}
if ((retval != KRB5_CC_NOTFOUND && retval != KRB5_CC_NOT_KTYPE)
if (options & KRB5_GC_CANONICALIZE)
kdcopt |= KDC_OPT_CANONICALIZE;
+ if (options & KRB5_GC_FORWARDABLE)
+ kdcopt |= KDC_OPT_FORWARDABLE;
+ if (options & KRB5_GC_NO_TRANSIT_CHECK)
+ kdcopt |= KDC_OPT_DISABLE_TRANSITED_CHECK;
+ if (options & KRB5_GC_CONSTRAINED_DELEGATION) {
+ if (options & KRB5_GC_USER_USER)
+ return EINVAL;
+ kdcopt |= KDC_OPT_FORWARDABLE | KDC_OPT_CNAME_IN_ADDL_TKT;
+ }
retval = krb5_get_cred_from_kdc_opt(context, ccache, ncreds,
out_creds, &tgts, kdcopt);
}
krb5_free_tgt_creds(context, tgts);
}
+ if (!retval && (options & KRB5_GC_CONSTRAINED_DELEGATION)) {
+ if (((*out_creds)->ticket_flags & TKT_FLG_FORWARDABLE) == 0) {
+ retval = KRB5_TKT_NOT_FORWARDABLE;
+ krb5_free_creds(context, *out_creds);
+ *out_creds = NULL;
+ }
+ }
/*
* Translate KRB5_CC_NOTFOUND if we previously got
* KRB5_CC_NOT_KTYPE from krb5_cc_retrieve_cred(), in order to
&& not_ktype)
retval = KRB5_CC_NOT_KTYPE;
- if (!retval) {
+ if (!retval && (options & KRB5_GC_NO_STORE) == 0) {
/* the purpose of the krb5_get_credentials call is to
* obtain a set of credentials for the caller. the
* krb5_cc_store_cred() call is to optimize performance
*/
krb5_cc_store_cred(context, ccache, *out_creds);
}
+
return retval;
}
return(krb5_validate_or_renew_creds(context, creds, client, ccache,
in_tkt_service, 0));
}
+
0
};
+static krb5_error_code
+rewrite_server_realm(krb5_context context,
+ krb5_const_principal old_server,
+ const krb5_data *realm,
+ krb5_boolean tgs,
+ krb5_principal *server)
+{
+ krb5_error_code retval;
+
+ assert(*server == NULL);
+
+ retval = krb5_copy_principal(context, old_server, server);
+ if (retval)
+ return retval;
+
+ krb5_free_data_contents(context, &(*server)->realm);
+ (*server)->realm.data = NULL;
+
+ retval = krb5int_copy_data_contents(context, realm, &(*server)->realm);
+ if (retval)
+ goto cleanup;
+
+ if (tgs) {
+ krb5_free_data_contents(context, &(*server)->data[1]);
+ (*server)->data[1].data = NULL;
+
+ retval = krb5int_copy_data_contents(context, realm, &(*server)->data[1]);
+ if (retval)
+ goto cleanup;
+ }
+
+cleanup:
+ if (retval) {
+ krb5_free_principal(context, *server);
+ *server = NULL;
+ }
+
+ return retval;
+}
+
+static inline int
+tgt_is_local_realm(krb5_creds *tgt)
+{
+ return (tgt->server->length == 2
+ && data_eq_string(tgt->server->data[0], KRB5_TGS_NAME)
+ && data_eq(tgt->server->data[1], tgt->client->realm)
+ && data_eq(tgt->server->realm, tgt->client->realm));
+}
+
krb5_error_code KRB5_CALLCONV
krb5_get_in_tkt(krb5_context context,
krb5_flags options,
int use_master = 0;
int referral_count = 0;
krb5_principal_data referred_client;
+ krb5_principal referred_server = NULL;
+ krb5_boolean is_tgt_req;
#if APPLE_PKINIT
inTktDebug("krb5_get_in_tkt top\n");
goto cleanup;
}
+ is_tgt_req = tgt_is_local_realm(creds);
+
while (1) {
if (loopcount++ > MAX_IN_TKT_LOOPS) {
retval = KRB5_GET_IN_TKT_LOOP;
if (retval)
goto cleanup;
request.client = &referred_client;
+
+ if (referred_server != NULL) {
+ krb5_free_principal(context, referred_server);
+ referred_server = NULL;
+ }
+
+ retval = rewrite_server_realm(context,
+ creds->server,
+ &referred_client.realm,
+ is_tgt_req,
+ &referred_server);
+ if (retval)
+ goto cleanup;
+ request.server = referred_server;
+
continue;
} else {
retval = (krb5_error_code) err_reply->error
}
if (referred_client.realm.data)
krb5_free_data_contents(context, &referred_client.realm);
+ if (referred_server)
+ krb5_free_principal(context, referred_server);
return (retval);
}
return 0;
}
+static krb5_error_code
+build_in_tkt_name(krb5_context context,
+ char *in_tkt_service,
+ krb5_const_principal client,
+ krb5_principal *server)
+{
+ krb5_error_code ret;
+
+ *server = NULL;
+
+ if (in_tkt_service) {
+ /* this is ugly, because so are the data structures involved. I'm
+ in the library, so I'm going to manipulate the data structures
+ directly, otherwise, it will be worse. */
+
+ if ((ret = krb5_parse_name(context, in_tkt_service, server)))
+ return ret;
+
+ /* stuff the client realm into the server principal.
+ realloc if necessary */
+ if ((*server)->realm.length < client->realm.length) {
+ char *p = realloc((*server)->realm.data,
+ client->realm.length);
+ if (p == NULL) {
+ krb5_free_principal(context, *server);
+ *server = NULL;
+ return ENOMEM;
+ }
+ (*server)->realm.data = p;
+ }
+
+ (*server)->realm.length = client->realm.length;
+ memcpy((*server)->realm.data, client->realm.data, client->realm.length);
+ } else {
+ ret = krb5_build_principal_ext(context, server,
+ client->realm.length,
+ client->realm.data,
+ KRB5_TGS_NAME_SIZE,
+ KRB5_TGS_NAME,
+ client->realm.length,
+ client->realm.data,
+ 0);
+ }
+ return ret;
+}
+
krb5_error_code KRB5_CALLCONV
krb5_get_init_creds(krb5_context context,
krb5_creds *creds,
client->type == KRB5_NT_ENTERPRISE_PRINCIPAL;
/* service */
-
- if (in_tkt_service) {
- /* this is ugly, because so are the data structures involved. I'm
- in the library, so I'm going to manipulate the data structures
- directly, otherwise, it will be worse. */
-
- if ((ret = krb5_parse_name(context, in_tkt_service, &request.server)))
- goto cleanup;
-
- /* stuff the client realm into the server principal.
- realloc if necessary */
- if (request.server->realm.length < request.client->realm.length) {
- char *p = realloc(request.server->realm.data,
- request.client->realm.length);
- if (p == NULL) {
- ret = ENOMEM;
- goto cleanup;
- }
- request.server->realm.data = p;
- }
-
- request.server->realm.length = request.client->realm.length;
- memcpy(request.server->realm.data, request.client->realm.data,
- request.client->realm.length);
- } else {
- if ((ret = krb5_build_principal_ext(context, &request.server,
- request.client->realm.length,
- request.client->realm.data,
- KRB5_TGS_NAME_SIZE,
- KRB5_TGS_NAME,
- request.client->realm.length,
- request.client->realm.data,
- 0)))
- goto cleanup;
- }
+ if ((ret = build_in_tkt_name(context, in_tkt_service,
+ request.client, &request.server)))
+ goto cleanup;
krb5_preauth_request_context_init(context);
}
preauth_to_use = out_padata;
out_padata = NULL;
- krb5_free_error(context, err_reply);
- err_reply = NULL;
+ if (err_reply->error == KDC_ERR_PREAUTH_REQUIRED) {
+ krb5_free_error(context, err_reply);
+ err_reply = NULL;
+ }
ret = sort_krb5_padata_sequence(context,
&request.server->realm,
preauth_to_use);
if (ret)
goto cleanup;
request.client = &referred_client;
+
+ krb5_free_principal(context, request.server);
+ request.server = NULL;
+
+ ret = build_in_tkt_name(context, in_tkt_service,
+ request.client, &request.server);
+ if (ret)
+ goto cleanup;
} else {
if (retry) {
/* continue to next iteration */
krb5_creds *in_cred, krb5_creds **out_cred,
krb5_creds ***tgts, int kdcopt);
+krb5_error_code
+krb5_get_credentials_core(krb5_context context, krb5_flags options,
+ krb5_creds *in_creds, krb5_creds *mcreds,
+ krb5_flags *fields);
+
#define in_clock_skew(date, now) (labs((date)-(now)) < context->clockskew)
#define IS_TGS_PRINC(c, p) \
(krb5_princ_size((c), (p)) == 2 && \
data_eq_string(*krb5_princ_component((c), (p), 0), KRB5_TGS_NAME))
+krb5_error_code
+krb5_get_cred_via_tkt_ext (krb5_context context, krb5_creds *tkt,
+ krb5_flags kdcoptions, krb5_address *const *address,
+ krb5_pa_data **in_padata,
+ krb5_creds *in_cred,
+ krb5_error_code (*gcvt_fct)(krb5_context,
+ krb5_keyblock *,
+ krb5_kdc_req *,
+ void *),
+ void *gcvt_data,
+ krb5_pa_data ***out_padata,
+ krb5_pa_data ***enc_padata,
+ krb5_creds **out_cred,
+ krb5_keyblock **out_subkey);
+
#endif /* KRB5_INT_FUNC_PROTO__ */
if (val == NULL)
return;
free(val->contents);
- val->contents = 0;
+ val->contents = NULL;
}
void KRB5_CALLCONV
krb5_free_last_req(context, val->last_req);
krb5_free_principal(context, val->server);
krb5_free_addresses(context, val->caddrs);
+ krb5_free_pa_data(context, val->enc_padata);
free(val);
}
free(req);
}
+void KRB5_CALLCONV
+krb5_free_s4u_userid_contents(krb5_context context, krb5_s4u_userid *user_id)
+{
+ if (user_id == NULL)
+ return;
+ user_id->nonce = 0;
+ krb5_free_principal(context, user_id->user);
+ user_id->user = NULL;
+ krb5_free_data_contents(context, &user_id->subject_cert);
+ user_id->subject_cert.length = 0;
+ user_id->subject_cert.data = NULL;
+ user_id->options = 0;
+}
+
+void KRB5_CALLCONV
+krb5_free_pa_s4u_x509_user(krb5_context context, krb5_pa_s4u_x509_user *req)
+{
+ if (req == NULL)
+ return;
+ krb5_free_s4u_userid_contents(context, &req->user_id);
+ krb5_free_checksum_contents(context, &req->cksum);
+ free(req);
+}
+
void KRB5_CALLCONV
krb5_free_pa_server_referral_data(krb5_context context,
krb5_pa_server_referral_data *ref)
return(0);
}
+static krb5_error_code pa_s4u_x509_user(
+ krb5_context context,
+ krb5_kdc_req *request,
+ krb5_pa_data *in_padata,
+ krb5_pa_data **out_padata,
+ krb5_data *salt,
+ krb5_data *s2kparams,
+ krb5_enctype *etype,
+ krb5_keyblock *as_key,
+ krb5_prompter_fct prompter,
+ void *prompter_data,
+ krb5_gic_get_as_key_fct gak_fct,
+ void *gak_data)
+{
+ krb5_s4u_userid *userid = (krb5_s4u_userid *)gak_data; /* XXX private contract */
+ krb5_pa_data *s4u_padata;
+ krb5_error_code code;
+ krb5_principal client;
+
+ *out_padata = NULL;
+
+ if (userid == NULL)
+ return EINVAL;
+
+ code = krb5_copy_principal(context, request->client, &client);
+ if (code != 0)
+ return code;
+
+ if (userid->user != NULL)
+ krb5_free_principal(context, userid->user);
+ userid->user = client;
+
+ if (userid->subject_cert.length != 0) {
+ s4u_padata = malloc(sizeof(*s4u_padata));
+ if (s4u_padata == NULL)
+ return ENOMEM;
+
+ s4u_padata->magic = KV5M_PA_DATA;
+ s4u_padata->pa_type = KRB5_PADATA_S4U_X509_USER;
+ s4u_padata->contents = malloc(userid->subject_cert.length);
+ if (s4u_padata->contents == NULL) {
+ free(s4u_padata);
+ return ENOMEM;
+ }
+ memcpy(s4u_padata->contents, userid->subject_cert.data, userid->subject_cert.length);
+ s4u_padata->length = userid->subject_cert.length;
+
+ *out_padata = s4u_padata;
+ }
+
+ return 0;
+}
+
/* FIXME - order significant? */
static const pa_types_t pa_types[] = {
{
pa_fx_cookie,
PA_INFO,
},
+ {
+ KRB5_PADATA_S4U_X509_USER,
+ pa_s4u_x509_user,
+ PA_INFO,
+ },
{
-1,
NULL,
--- /dev/null
+/* -*- mode: c; indent-tabs-mode: nil -*- */
+/*
+ * lib/krb5/krb/s4u_creds.c
+ *
+ * Copyright (C) 2009 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ *
+ *
+ *
+ */
+
+#include "k5-int.h"
+#include "int-proto.h"
+
+/* Convert ticket flags to necessary KDC options */
+#define FLAGS2OPTS(flags) (flags & KDC_TKT_COMMON_MASK)
+
+/*
+ * Implements S4U2Self, by which a service can request a ticket to
+ * itself on behalf of an arbitrary principal.
+ */
+
+static krb5_error_code
+krb5_get_as_key_noop(
+ krb5_context context,
+ krb5_principal client,
+ krb5_enctype etype,
+ krb5_prompter_fct prompter,
+ void *prompter_data,
+ krb5_data *salt,
+ krb5_data *params,
+ krb5_keyblock *as_key,
+ void *gak_data)
+{
+ /* force a hard error, we don't actually have the key */
+ return KDC_ERR_PREAUTH_FAILED;
+}
+
+static krb5_error_code
+s4u_identify_user(krb5_context context,
+ krb5_creds *in_creds,
+ krb5_data *subject_cert,
+ krb5_principal *canon_user)
+{
+ krb5_error_code code;
+ krb5_preauthtype ptypes[1] = { KRB5_PADATA_S4U_X509_USER };
+ krb5_creds creds;
+ int use_master = 0;
+ krb5_get_init_creds_opt *opts = NULL;
+ krb5_gic_opt_ext *opte = NULL;
+ krb5_principal_data client_data;
+ krb5_principal client;
+ krb5_s4u_userid userid;
+
+ *canon_user = NULL;
+
+ if (in_creds->client == NULL && subject_cert == NULL) {
+ return EINVAL;
+ }
+
+ if (in_creds->client != NULL &&
+ krb5_princ_type(context, in_creds->client) !=
+ KRB5_NT_ENTERPRISE_PRINCIPAL)
+ /* we already know the realm of the user */
+ return krb5_copy_principal(context, in_creds->client, canon_user);
+
+ memset(&creds, 0, sizeof(creds));
+
+ memset(&userid, 0, sizeof(userid));
+ if (subject_cert != NULL)
+ userid.subject_cert = *subject_cert;
+
+ code = krb5_get_init_creds_opt_alloc(context, &opts);
+ if (code != 0)
+ goto cleanup;
+ krb5_get_init_creds_opt_set_tkt_life(opts, 15);
+ krb5_get_init_creds_opt_set_renew_life(opts, 0);
+ krb5_get_init_creds_opt_set_forwardable(opts, 0);
+ krb5_get_init_creds_opt_set_proxiable(opts, 0);
+ krb5_get_init_creds_opt_set_canonicalize(opts, 1);
+ krb5_get_init_creds_opt_set_preauth_list(opts, ptypes, 1);
+ code = krb5int_gic_opt_to_opte(context, opts, &opte,
+ 0, "s4u_identify_user");
+ if (code != 0)
+ goto cleanup;
+
+ if (in_creds->client != NULL)
+ client = in_creds->client;
+ else {
+ client_data.magic = KV5M_PRINCIPAL;
+ client_data.realm = in_creds->server->realm;
+ /* should this be NULL, empty or a fixed string? XXX */
+ client_data.data = NULL;
+ client_data.length = 0;
+ client_data.type = KRB5_NT_ENTERPRISE_PRINCIPAL;
+ client = &client_data;
+ }
+
+ code = krb5_get_init_creds(context, &creds, in_creds->client,
+ NULL, NULL, 0, NULL, opte,
+ krb5_get_as_key_noop, &userid,
+ &use_master, NULL);
+ if (code == 0 ||
+ code == KDC_ERR_PREAUTH_REQUIRED ||
+ code == KDC_ERR_PREAUTH_FAILED) {
+ *canon_user = userid.user;
+ userid.user = NULL;
+ code = 0;
+ }
+
+cleanup:
+ krb5_free_cred_contents(context, &creds);
+ if (opts != NULL)
+ krb5_get_init_creds_opt_free(context, opts);
+ if (userid.user != NULL)
+ krb5_free_principal(context, userid.user);
+
+ return code;
+}
+
+static krb5_error_code
+make_pa_for_user_checksum(krb5_context context,
+ krb5_keyblock *key,
+ krb5_pa_for_user *req,
+ krb5_checksum *cksum)
+{
+ krb5_error_code code;
+ int i;
+ krb5_int32 name_type;
+ char *p;
+ krb5_data data;
+ krb5_cksumtype cksumtype;
+
+ data.length = 4;
+ for (i = 0; i < krb5_princ_size(context, req->user); i++) {
+ data.length += krb5_princ_component(context, req->user, i)->length;
+ }
+ data.length += krb5_princ_realm(context, req->user)->length;
+ data.length += req->auth_package.length;
+
+ p = data.data = malloc(data.length);
+ if (data.data == NULL)
+ return ENOMEM;
+
+ name_type = krb5_princ_type(context, req->user);
+ p[0] = (name_type >> 0 ) & 0xFF;
+ p[1] = (name_type >> 8 ) & 0xFF;
+ p[2] = (name_type >> 16) & 0xFF;
+ p[3] = (name_type >> 24) & 0xFF;
+ p += 4;
+
+ for (i = 0; i < krb5_princ_size(context, req->user); i++) {
+ memcpy(p, krb5_princ_component(context, req->user, i)->data,
+ krb5_princ_component(context, req->user, i)->length);
+ p += krb5_princ_component(context, req->user, i)->length;
+ }
+
+ memcpy(p, krb5_princ_realm(context, req->user)->data,
+ krb5_princ_realm(context, req->user)->length);
+ p += krb5_princ_realm(context, req->user)->length;
+
+ memcpy(p, req->auth_package.data, req->auth_package.length);
+
+ code = krb5int_c_mandatory_cksumtype(context, key->enctype, &cksumtype);
+ if (code != 0) {
+ free(data.data);
+ return code;
+ }
+
+ code = krb5_c_make_checksum(context, cksumtype, key,
+ KRB5_KEYUSAGE_APP_DATA_CKSUM, &data,
+ cksum);
+
+ free(data.data);
+
+ return code;
+}
+
+static krb5_error_code
+build_pa_for_user(krb5_context context,
+ krb5_creds *tgt,
+ krb5_s4u_userid *userid,
+ krb5_pa_data **out_padata)
+{
+ krb5_error_code code;
+ krb5_pa_data *padata;
+ krb5_pa_for_user for_user;
+ krb5_data *for_user_data = NULL;
+ char package[] = "Kerberos";
+
+ if (userid->user == NULL) {
+ code = EINVAL;
+ goto cleanup;
+ }
+
+ memset(&for_user, 0, sizeof(for_user));
+ for_user.user = userid->user;
+ for_user.auth_package.data = package;
+ for_user.auth_package.length = sizeof(package) - 1;
+
+ code = make_pa_for_user_checksum(context, &tgt->keyblock,
+ &for_user, &for_user.cksum);
+ if (code != 0)
+ goto cleanup;
+
+ code = encode_krb5_pa_for_user(&for_user, &for_user_data);
+ if (code != 0)
+ goto cleanup;
+
+ padata = malloc(sizeof(*padata));
+ if (padata == NULL) {
+ code = ENOMEM;
+ goto cleanup;
+ }
+
+ padata->magic = KV5M_PA_DATA;
+ padata->pa_type = KRB5_PADATA_FOR_USER;
+ padata->length = for_user_data->length;
+ padata->contents = (krb5_octet *)for_user_data->data;
+
+ free(for_user_data);
+ for_user_data = NULL;
+
+ *out_padata = padata;
+
+cleanup:
+ if (for_user.cksum.contents != NULL)
+ krb5_free_checksum_contents(context, &for_user.cksum);
+ krb5_free_data(context, for_user_data);
+
+ return code;
+}
+
+/*
+ * This function is invoked by krb5int_send_tgs() just before
+ * the request is encoded; it gives us access to the nonce and
+ * subkey without requiring them to be generated by the caller.
+ */
+static krb5_error_code
+build_pa_s4u_x509_user(krb5_context context,
+ krb5_keyblock *subkey,
+ krb5_kdc_req *tgsreq,
+ void *gcvt_data)
+{
+ krb5_error_code code;
+ krb5_pa_s4u_x509_user *s4u_user = (krb5_pa_s4u_x509_user *)gcvt_data;
+ krb5_data *data = NULL;
+ krb5_pa_data **padata;
+ krb5_cksumtype cksumtype;
+ int i;
+
+ assert(s4u_user->cksum.contents == NULL);
+
+ s4u_user->user_id.nonce = tgsreq->nonce;
+
+ code = encode_krb5_s4u_userid(&s4u_user->user_id, &data);
+ if (code != 0)
+ goto cleanup;
+
+ /* [MS-SFU] 2.2.2: unusual to say the least, but enc_padata secures it */
+ if (subkey->enctype == ENCTYPE_ARCFOUR_HMAC ||
+ subkey->enctype == ENCTYPE_ARCFOUR_HMAC_EXP) {
+ cksumtype = CKSUMTYPE_RSA_MD4;
+ } else {
+ code = krb5int_c_mandatory_cksumtype(context, subkey->enctype,
+ &cksumtype);
+ }
+ if (code != 0)
+ goto cleanup;
+
+ code = krb5_c_make_checksum(context, cksumtype, subkey,
+ KRB5_KEYUSAGE_PA_S4U_X509_USER_REQUEST, data,
+ &s4u_user->cksum);
+ if (code != 0)
+ goto cleanup;
+
+ krb5_free_data(context, data);
+ data = NULL;
+
+ code = encode_krb5_pa_s4u_x509_user(s4u_user, &data);
+ if (code != 0)
+ goto cleanup;
+
+ assert(tgsreq->padata != NULL);
+
+ for (i = 0; tgsreq->padata[i] != NULL; i++)
+ ;
+
+ padata = realloc(tgsreq->padata,
+ (i + 2) * sizeof(krb5_pa_data *));
+ if (padata == NULL) {
+ code = ENOMEM;
+ goto cleanup;
+ }
+ tgsreq->padata = padata;
+
+ padata[i] = malloc(sizeof(krb5_pa_data));
+ if (padata[i] == NULL) {
+ code = ENOMEM;
+ goto cleanup;
+ }
+ padata[i]->magic = KV5M_PA_DATA;
+ padata[i]->pa_type = KRB5_PADATA_S4U_X509_USER;
+ padata[i]->length = data->length;
+ padata[i]->contents = (krb5_octet *)data->data;
+
+ padata[i + 1] = NULL;
+
+ free(data);
+ data = NULL;
+
+cleanup:
+ if (code != 0 && s4u_user->cksum.contents != NULL) {
+ krb5_free_checksum_contents(context, &s4u_user->cksum);
+ s4u_user->cksum.contents = NULL;
+ }
+ krb5_free_data(context, data);
+
+ return code;
+}
+
+static krb5_error_code
+verify_s4u2self_reply(krb5_context context,
+ krb5_keyblock *subkey,
+ krb5_pa_s4u_x509_user *req_s4u_user,
+ krb5_pa_data **rep_padata,
+ krb5_pa_data **enc_padata)
+{
+ krb5_error_code code;
+ krb5_pa_data *rep_s4u_padata, *enc_s4u_padata;
+ krb5_pa_s4u_x509_user *rep_s4u_user = NULL;
+ krb5_data data, *datap = NULL;
+ krb5_keyusage usage;
+ krb5_boolean valid;
+ krb5_boolean not_newer;
+
+ assert(req_s4u_user != NULL);
+
+ switch (subkey->enctype) {
+ case ENCTYPE_DES_CBC_CRC:
+ case ENCTYPE_DES_CBC_MD4:
+ case ENCTYPE_DES_CBC_MD5:
+ case ENCTYPE_DES3_CBC_SHA1:
+ case ENCTYPE_DES3_CBC_RAW:
+ case ENCTYPE_ARCFOUR_HMAC:
+ case ENCTYPE_ARCFOUR_HMAC_EXP :
+ not_newer = TRUE;
+ break;
+ default:
+ not_newer = FALSE;
+ break;
+ }
+
+ enc_s4u_padata = krb5int_find_pa_data(context,
+ enc_padata,
+ KRB5_PADATA_S4U_X509_USER);
+
+ /* XXX this will break newer enctypes with a MIT 1.7 KDC */
+ rep_s4u_padata = krb5int_find_pa_data(context,
+ rep_padata,
+ KRB5_PADATA_S4U_X509_USER);
+ if (rep_s4u_padata == NULL) {
+ if (not_newer == FALSE || enc_s4u_padata != NULL)
+ return KRB5_KDCREP_MODIFIED;
+ else
+ return 0;
+ }
+
+ data.length = rep_s4u_padata->length;
+ data.data = (char *)rep_s4u_padata->contents;
+
+ code = decode_krb5_pa_s4u_x509_user(&data, &rep_s4u_user);
+ if (code != 0)
+ goto cleanup;
+
+ if (rep_s4u_user->user_id.nonce != req_s4u_user->user_id.nonce) {
+ code = KRB5_KDCREP_MODIFIED;
+ goto cleanup;
+ }
+
+ code = encode_krb5_s4u_userid(&rep_s4u_user->user_id, &datap);
+ if (code != 0)
+ goto cleanup;
+
+ if (rep_s4u_user->user_id.options & KRB5_S4U_OPTS_USE_REPLY_KEY_USAGE)
+ usage = KRB5_KEYUSAGE_PA_S4U_X509_USER_REPLY;
+ else
+ usage = KRB5_KEYUSAGE_PA_S4U_X509_USER_REQUEST;
+
+ code = krb5_c_verify_checksum(context, subkey, usage, datap,
+ &rep_s4u_user->cksum, &valid);
+ if (code != 0)
+ goto cleanup;
+ if (valid == FALSE) {
+ code = KRB5_KDCREP_MODIFIED;
+ goto cleanup;
+ }
+
+ /*
+ * KDCs that support KRB5_S4U_OPTS_USE_REPLY_KEY_USAGE also return
+ * S4U enc_padata for older (pre-AES) encryption types only.
+ */
+ if (not_newer) {
+ if (enc_s4u_padata == NULL) {
+ if (rep_s4u_user->user_id.options &
+ KRB5_S4U_OPTS_USE_REPLY_KEY_USAGE) {
+ code = KRB5_KDCREP_MODIFIED;
+ goto cleanup;
+ }
+ } else {
+ if (enc_s4u_padata->length !=
+ req_s4u_user->cksum.length + rep_s4u_user->cksum.length) {
+ code = KRB5_KDCREP_MODIFIED;
+ goto cleanup;
+ }
+ if (memcmp(enc_s4u_padata->contents,
+ req_s4u_user->cksum.contents,
+ req_s4u_user->cksum.length) ||
+ memcmp(&enc_s4u_padata->contents[req_s4u_user->cksum.length],
+ rep_s4u_user->cksum.contents,
+ rep_s4u_user->cksum.length)) {
+ code = KRB5_KDCREP_MODIFIED;
+ goto cleanup;
+ }
+ }
+ } else if (!krb5_c_is_keyed_cksum(rep_s4u_user->cksum.checksum_type)) {
+ code = KRB5KRB_AP_ERR_INAPP_CKSUM;
+ goto cleanup;
+ }
+
+cleanup:
+ krb5_free_pa_s4u_x509_user(context, rep_s4u_user);
+ krb5_free_data(context, datap);
+
+ return code;
+}
+
+static krb5_error_code
+krb5_get_self_cred_from_kdc(krb5_context context,
+ krb5_flags options,
+ krb5_ccache ccache,
+ krb5_creds *in_creds,
+ krb5_data *subject_cert,
+ krb5_data *user_realm,
+ krb5_creds **out_creds)
+{
+ krb5_error_code code;
+ krb5_principal tgs = NULL;
+ krb5_creds tgtq, s4u_creds, *tgt = NULL, *tgtptr;
+ krb5_creds *referral_tgts[KRB5_REFERRAL_MAXHOPS];
+ krb5_pa_s4u_x509_user s4u_user;
+ int referral_count = 0, i;
+ krb5_flags kdcopt;
+
+ memset(&tgtq, 0, sizeof(tgtq));
+ memset(&s4u_creds, 0, sizeof(s4u_creds));
+ memset(referral_tgts, 0, sizeof(referral_tgts));
+ *out_creds = NULL;
+
+ memset(&s4u_user, 0, sizeof(s4u_user));
+
+ if (in_creds->client != NULL &&
+ krb5_princ_size(context, in_creds->client)) {
+ if (krb5_princ_type(context, in_creds->client) ==
+ KRB5_NT_ENTERPRISE_PRINCIPAL)
+ {
+ code = krb5_build_principal_ext(context,
+ &s4u_user.user_id.user,
+ user_realm->length,
+ user_realm->data,
+ in_creds->client->data[0].length,
+ in_creds->client->data[0].data,
+ 0);
+ if (code != 0)
+ goto cleanup;
+ s4u_user.user_id.user->type = KRB5_NT_ENTERPRISE_PRINCIPAL;
+ } else {
+ code = krb5_copy_principal(context,
+ in_creds->client,
+ &s4u_user.user_id.user);
+ if (code != 0)
+ goto cleanup;
+ }
+ } else {
+ code = krb5_build_principal_ext(context, &s4u_user.user_id.user,
+ user_realm->length,
+ user_realm->data);
+ if (code != 0)
+ goto cleanup;
+ s4u_user.user_id.user->type = KRB5_NT_ENTERPRISE_PRINCIPAL;
+ }
+ if (subject_cert != NULL)
+ s4u_user.user_id.subject_cert = *subject_cert;
+ s4u_user.user_id.options = KRB5_S4U_OPTS_USE_REPLY_KEY_USAGE;
+
+ /* First, acquire a TGT to the user's realm. */
+ code = krb5_tgtname(context, user_realm,
+ krb5_princ_realm(context, in_creds->server), &tgs);
+ if (code != 0)
+ goto cleanup;
+
+ tgtq.client = in_creds->server;
+ tgtq.server = tgs;
+
+ code = krb5_get_credentials(context, options, ccache, &tgtq, &tgt);
+ if (code != 0)
+ goto cleanup;
+
+ tgtptr = tgt;
+
+ code = krb5int_copy_creds_contents(context, in_creds, &s4u_creds);
+ if (code != 0)
+ goto cleanup;
+
+ if (s4u_creds.client != NULL) {
+ krb5_free_principal(context, s4u_creds.client);
+ s4u_creds.client = NULL;
+ }
+
+ code = krb5_copy_principal(context, in_creds->server, &s4u_creds.client);
+ if (code != 0)
+ goto cleanup;
+
+ /* Then, walk back the referral path to S4U2Self for user */
+ kdcopt = 0;
+ if (options & KRB5_GC_CANONICALIZE)
+ kdcopt |= KDC_OPT_CANONICALIZE;
+ if (options & KRB5_GC_FORWARDABLE)
+ kdcopt |= KDC_OPT_FORWARDABLE;
+ if (options & KRB5_GC_NO_TRANSIT_CHECK)
+ kdcopt |= KDC_OPT_DISABLE_TRANSITED_CHECK;
+
+ for (referral_count = 0;
+ referral_count < KRB5_REFERRAL_MAXHOPS;
+ referral_count++)
+ {
+ krb5_pa_data **in_padata = NULL;
+ krb5_pa_data **out_padata = NULL;
+ krb5_pa_data **enc_padata = NULL;
+ krb5_keyblock *subkey = NULL;
+
+ if (s4u_user.user_id.user != NULL &&
+ krb5_princ_size(context, s4u_user.user_id.user)) {
+ in_padata = calloc(2, sizeof(krb5_pa_data *));
+ if (in_padata == NULL) {
+ code = ENOMEM;
+ goto cleanup;
+ }
+ code = build_pa_for_user(context,
+ tgtptr,
+ &s4u_user.user_id, &in_padata[0]);
+ if (code != 0) {
+ krb5_free_pa_data(context, in_padata);
+ goto cleanup;
+ }
+ }
+
+ /* Rewrite server realm to match TGS realm */
+ krb5_free_data_contents(context, &s4u_creds.server->realm);
+
+ code = krb5int_copy_data_contents(context,
+ &tgtptr->server->data[1],
+ &s4u_creds.server->realm);
+ if (code != 0)
+ goto cleanup;
+
+ code = krb5_get_cred_via_tkt_ext(context, tgtptr,
+ KDC_OPT_CANONICALIZE |
+ FLAGS2OPTS(tgtptr->ticket_flags) |
+ kdcopt,
+ tgtptr->addresses,
+ in_padata, &s4u_creds,
+ build_pa_s4u_x509_user, &s4u_user,
+ &out_padata, &enc_padata,
+ out_creds, &subkey);
+ if (code != 0) {
+ krb5_free_checksum_contents(context, &s4u_user.cksum);
+ krb5_free_pa_data(context, in_padata);
+ goto cleanup;
+ }
+
+ code = verify_s4u2self_reply(context, subkey, &s4u_user,
+ out_padata, enc_padata);
+
+ krb5_free_checksum_contents(context, &s4u_user.cksum);
+ krb5_free_pa_data(context, in_padata);
+ krb5_free_pa_data(context, out_padata);
+ krb5_free_pa_data(context, enc_padata);
+ krb5_free_keyblock(context, subkey);
+
+ if (code != 0)
+ goto cleanup;
+
+ if (krb5_principal_compare(context,
+ in_creds->server,
+ (*out_creds)->server)) {
+ code = 0;
+ goto cleanup;
+ } else if (IS_TGS_PRINC(context, (*out_creds)->server)) {
+ krb5_data *r1 = &tgtptr->server->data[1];
+ krb5_data *r2 = &(*out_creds)->server->data[1];
+
+ if (data_eq(*r1, *r2)) {
+ krb5_free_creds(context, *out_creds);
+ *out_creds = NULL;
+ code = KRB5_ERR_HOST_REALM_UNKNOWN;
+ break;
+ }
+ for (i = 0; i < referral_count; i++) {
+ if (krb5_principal_compare(context,
+ (*out_creds)->server,
+ referral_tgts[i]->server)) {
+ code = KRB5_KDC_UNREACH;
+ goto cleanup;
+ }
+ }
+
+ tgtptr = *out_creds;
+ referral_tgts[referral_count] = *out_creds;
+ *out_creds = NULL;
+ } else {
+ krb5_free_creds(context, *out_creds);
+ *out_creds = NULL;
+ code = KRB5KRB_AP_WRONG_PRINC; /* XXX */
+ break;
+ }
+ }
+
+cleanup:
+ for (i = 0; i < KRB5_REFERRAL_MAXHOPS; i++) {
+ if (referral_tgts[i] != NULL)
+ krb5_free_creds(context, referral_tgts[i]);
+ }
+ krb5_free_principal(context, tgs);
+ krb5_free_creds(context, tgt);
+ krb5_free_cred_contents(context, &s4u_creds);
+ krb5_free_principal(context, s4u_user.user_id.user);
+ krb5_free_checksum_contents(context, &s4u_user.cksum);
+
+ return code;
+}
+
+krb5_error_code KRB5_CALLCONV
+krb5_get_credentials_for_user(krb5_context context, krb5_flags options,
+ krb5_ccache ccache, krb5_creds *in_creds,
+ krb5_data *subject_cert,
+ krb5_creds **out_creds)
+{
+ krb5_error_code code;
+ krb5_principal realm = NULL;
+
+ *out_creds = NULL;
+
+ if (options & KRB5_GC_CONSTRAINED_DELEGATION) {
+ code = EINVAL;
+ goto cleanup;
+ }
+
+ if (in_creds->client != NULL) {
+ /* Uncanonicalised check */
+ code = krb5_get_credentials(context, options | KRB5_GC_CACHED,
+ ccache, in_creds, out_creds);
+ if (code != KRB5_CC_NOTFOUND && code != KRB5_CC_NOT_KTYPE)
+ goto cleanup;
+
+ if ((options & KRB5_GC_CACHED) && !(options & KRB5_GC_CANONICALIZE))
+ goto cleanup;
+ }
+
+ code = s4u_identify_user(context, in_creds, subject_cert, &realm);
+ if (code != 0)
+ goto cleanup;
+
+ code = krb5_get_credentials(context, options | KRB5_GC_CACHED,
+ ccache, in_creds, out_creds);
+ if ((code != KRB5_CC_NOTFOUND && code != KRB5_CC_NOT_KTYPE)
+ || options & KRB5_GC_CACHED)
+ goto cleanup;
+
+ code = krb5_get_self_cred_from_kdc(context, options, ccache,
+ in_creds, subject_cert,
+ krb5_princ_realm(context, realm),
+ out_creds);
+ if (code != 0)
+ goto cleanup;
+
+ assert(*out_creds != NULL);
+
+ if ((options & KRB5_GC_NO_STORE) == 0) {
+ code = krb5_cc_store_cred(context, ccache, *out_creds);
+ if (code != 0)
+ goto cleanup;
+ }
+
+cleanup:
+ if (code != 0 && *out_creds != NULL) {
+ krb5_free_creds(context, *out_creds);
+ *out_creds = NULL;
+ }
+
+ krb5_free_principal(context, realm);
+
+ return code;
+}
+
+/*
+ * Exported API for constrained delegation (S4U2Proxy).
+ *
+ * This is preferable to using krb5_get_credentials directly because
+ * it can perform some additional checks.
+ */
+krb5_error_code KRB5_CALLCONV
+krb5_get_credentials_for_proxy(krb5_context context,
+ krb5_flags options,
+ krb5_ccache ccache,
+ krb5_creds *in_creds,
+ krb5_ticket *evidence_tkt,
+ krb5_creds **out_creds)
+{
+ krb5_error_code code;
+ krb5_creds mcreds;
+ krb5_creds *ncreds = NULL;
+ krb5_flags fields;
+ krb5_data *evidence_tkt_data = NULL;
+ krb5_creds s4u_creds;
+
+ *out_creds = NULL;
+
+ if (in_creds == NULL || in_creds->client == NULL ||
+ evidence_tkt == NULL || evidence_tkt->enc_part2 == NULL) {
+ code = EINVAL;
+ goto cleanup;
+ }
+
+ /*
+ * Caller should have set in_creds->client to match evidence
+ * ticket client
+ */
+ if (!krb5_principal_compare(context, evidence_tkt->enc_part2->client,
+ in_creds->client)) {
+ code = EINVAL;
+ goto cleanup;
+ }
+
+ if ((evidence_tkt->enc_part2->flags & TKT_FLG_FORWARDABLE) == 0) {
+ code = KRB5_TKT_NOT_FORWARDABLE;
+ goto cleanup;
+ }
+
+ code = krb5_get_credentials_core(context, options, in_creds,
+ &mcreds, &fields);
+ if (code != 0)
+ goto cleanup;
+
+ ncreds = calloc(1, sizeof(*ncreds));
+ if (ncreds == NULL) {
+ code = ENOMEM;
+ goto cleanup;
+ }
+ ncreds->magic = KV5M_CRED;
+
+ code = krb5_cc_retrieve_cred(context, ccache, fields, &mcreds, ncreds);
+ if (code != 0) {
+ free(ncreds);
+ ncreds = in_creds;
+ } else {
+ *out_creds = ncreds;
+ }
+
+ if ((code != KRB5_CC_NOTFOUND && code != KRB5_CC_NOT_KTYPE)
+ || options & KRB5_GC_CACHED)
+ goto cleanup;
+
+ code = encode_krb5_ticket(evidence_tkt, &evidence_tkt_data);
+ if (code != 0)
+ goto cleanup;
+
+ s4u_creds = *in_creds;
+ s4u_creds.client = evidence_tkt->server;
+ s4u_creds.second_ticket = *evidence_tkt_data;
+
+ code = krb5_get_credentials(context,
+ options | KRB5_GC_CONSTRAINED_DELEGATION,
+ ccache,
+ &s4u_creds,
+ out_creds);
+ if (code != 0)
+ goto cleanup;
+
+ /*
+ * Check client name because we couldn't compare that inside
+ * krb5_get_credentials() (enc_part2 is unavailable in clear)
+ */
+ if (!krb5_principal_compare(context,
+ evidence_tkt->enc_part2->client,
+ (*out_creds)->client)) {
+ code = KRB5_KDCREP_MODIFIED;
+ goto cleanup;
+ }
+
+cleanup:
+ if (*out_creds != NULL && code != 0) {
+ krb5_free_creds(context, *out_creds);
+ *out_creds = NULL;
+ }
+ if (evidence_tkt_data != NULL)
+ krb5_free_data(context, evidence_tkt_data);
+
+ return code;
+}
if (retval)
goto cleanup;
}
-
+
/* Generate checksum */
if ((retval = krb5_c_make_checksum(context, cksumtype,
&in_cred->keyblock,
}
/*
* Note that this function fills in part of rep even on failure.
+ *
+ * The pacb_fct callback allows the caller access to the nonce
+ * and request subkey, for binding preauthentication data
*/
krb5_error_code
krb5int_send_tgs(krb5_context context, krb5_flags kdcoptions,
krb5_const_principal sname, krb5_address *const *addrs,
krb5_authdata *const *authorization_data,
krb5_pa_data *const *padata, const krb5_data *second_ticket,
- krb5_creds *in_cred, krb5_response *rep, krb5_keyblock **subkey)
+ krb5_creds *in_cred,
+ krb5_error_code (*pacb_fct)(krb5_context,
+ krb5_keyblock *,
+ krb5_kdc_req *,
+ void *),
+ void *pacb_data,
+ krb5_response *rep, krb5_keyblock **subkey)
{
krb5_error_code retval;
krb5_kdc_req tgsreq;
krb5_ticket *sec_ticket = 0;
krb5_ticket *sec_ticket_arr[2];
krb5_timestamp time_now;
- krb5_pa_data **combined_padata;
+ krb5_pa_data **combined_padata = NULL;
krb5_pa_data ap_req_padata;
int tcp_only = 0, use_master;
krb5_keyblock *local_subkey = NULL;
assert (subkey != NULL);
*subkey = NULL;
+
/*
* in_creds MUST be a valid credential NOT just a partially filled in
* place holder for us to get credentials for the caller.
/* Get the encryption types list */
if (ktypes) {
- /* Check passed ktypes and make sure they're valid. */
- for (tgsreq.nktypes = 0; ktypes[tgsreq.nktypes]; tgsreq.nktypes++) {
+ /* Check passed ktypes and make sure they're valid. */
+ for (tgsreq.nktypes = 0; ktypes[tgsreq.nktypes]; tgsreq.nktypes++) {
if (!krb5_c_valid_enctype(ktypes[tgsreq.nktypes]))
return KRB5_PROG_ETYPE_NOSUPP;
}
} else
tgsreq.second_ticket = 0;
+ ap_req_padata.contents = NULL;
+
/* encode the body; then checksum it */
if ((retval = encode_krb5_kdc_req_body(&tgsreq, &scratch)))
goto send_tgs_error_2;
}
krb5_free_data(context, scratch);
- ap_req_padata.pa_type = KRB5_PADATA_AP_REQ;
- ap_req_padata.length = scratch2.length;
- ap_req_padata.contents = (krb5_octet *)scratch2.data;
-
- /* combine in any other supplied padata */
+ tgsreq.padata = (krb5_pa_data **)calloc(2, sizeof(krb5_pa_data *));
+ if (tgsreq.padata == NULL) {
+ free(scratch2.data);
+ goto send_tgs_error_2;
+ }
+ tgsreq.padata[0] = (krb5_pa_data *)malloc(sizeof(krb5_pa_data));
+ if (tgsreq.padata[0] == NULL) {
+ free(scratch2.data);
+ goto send_tgs_error_2;
+ }
+ tgsreq.padata[0]->pa_type = KRB5_PADATA_AP_REQ;
+ tgsreq.padata[0]->length = scratch2.length;
+ tgsreq.padata[0]->contents = (krb5_octet *)scratch2.data;
+ tgsreq.padata[1] = NULL;
+
+ /* combine in any other supplied padata, unfortunately now it is
+ * necessary to copy it as the callback function might modify the
+ * padata, and having a separate path for the non-callback case,
+ * or attempting to determine which elements were changed by the
+ * callback, would have complicated the code significantly.
+ */
if (padata) {
- krb5_pa_data * const * counter;
- register unsigned int i = 0;
- for (counter = padata; *counter; counter++, i++);
- combined_padata = malloc((i+2) * sizeof(*combined_padata));
- if (!combined_padata) {
- free(ap_req_padata.contents);
- retval = ENOMEM;
- goto send_tgs_error_2;
- }
- combined_padata[0] = &ap_req_padata;
- for (i = 1, counter = padata; *counter; counter++, i++)
- combined_padata[i] = (krb5_pa_data *) *counter;
- combined_padata[i] = 0;
- } else {
- combined_padata = (krb5_pa_data **)malloc(2*sizeof(*combined_padata));
- if (!combined_padata) {
- free(ap_req_padata.contents);
- retval = ENOMEM;
+ krb5_pa_data **tmp;
+ int i;
+
+ for (i = 0; padata[i]; i++)
+ ;
+
+ tmp = (krb5_pa_data **)realloc(tgsreq.padata,
+ (i + 2) * sizeof(*combined_padata));
+ if (tmp == NULL)
goto send_tgs_error_2;
+
+ tgsreq.padata = tmp;
+
+ for (i = 0; padata[i]; i++) {
+ krb5_pa_data *pa;
+
+ pa = tgsreq.padata[1 + i] = (krb5_pa_data *)malloc(sizeof(krb5_pa_data));
+ if (tgsreq.padata == NULL) {
+ retval = ENOMEM;
+ goto send_tgs_error_2;
+ }
+
+ pa->pa_type = padata[i]->pa_type;
+ pa->length = padata[i]->length;
+ pa->contents = (krb5_octet *)malloc(padata[i]->length);
+ if (pa->contents == NULL) {
+ retval = ENOMEM;
+ goto send_tgs_error_2;
+ }
+ memcpy(pa->contents, padata[i]->contents, padata[i]->length);
}
- combined_padata[0] = &ap_req_padata;
- combined_padata[1] = 0;
+ tgsreq.padata[1 + i] = NULL;
}
- tgsreq.padata = combined_padata;
+ if (pacb_fct != NULL) {
+ if ((retval = (*pacb_fct)(context, local_subkey, &tgsreq, pacb_data)))
+ goto send_tgs_error_2;
+ }
/* the TGS_REQ is assembled in tgsreq, so encode it */
- if ((retval = encode_krb5_tgs_req(&tgsreq, &scratch))) {
- free(ap_req_padata.contents);
- free(combined_padata);
+ if ((retval = encode_krb5_tgs_req(&tgsreq, &scratch)))
goto send_tgs_error_2;
- }
- free(ap_req_padata.contents);
- free(combined_padata);
/* now send request & get response from KDC */
+ krb5_free_pa_data(context, tgsreq.padata);
+ tgsreq.padata = NULL;
+
send_again:
use_master = 0;
retval = krb5_sendto_kdc(context, scratch,
krb5_free_data(context, scratch);
send_tgs_error_2:;
+ if (tgsreq.padata)
+ krb5_free_pa_data(context, tgsreq.padata);
if (sec_ticket)
krb5_free_ticket(context, sec_ticket);
}
-krb5_error_code KRB5_CALLCONV
+krb5_error_code KRB5_CALLCONV
krb5_server_decrypt_ticket_keytab(krb5_context context,
- const krb5_keytab kt,
+ const krb5_keytab keytab,
krb5_ticket *ticket)
{
- krb5_error_code retval;
- krb5_enctype enctype;
- krb5_keytab_entry ktent;
+ krb5_error_code retval;
+ krb5_keytab_entry ktent;
+
+ retval = KRB5_KT_NOTFOUND;
+
+ if (keytab->ops->start_seq_get == NULL) {
+ retval = krb5_kt_get_entry(context, keytab,
+ ticket->server,
+ ticket->enc_part.kvno,
+ ticket->enc_part.enctype, &ktent);
+ if (retval == 0) {
+ retval = krb5int_server_decrypt_ticket_keyblock(context, &ktent.key, ticket);
+
+ (void) krb5_free_keytab_entry_contents(context, &ktent);
+ }
+ } else {
+ krb5_error_code code;
+ krb5_kt_cursor cursor;
+
+ retval = krb5_kt_start_seq_get(context, keytab, &cursor);
+ if (retval != 0)
+ goto map_error;
- enctype = ticket->enc_part.enctype;
+ while ((code = krb5_kt_next_entry(context, keytab,
+ &ktent, &cursor)) == 0) {
+ if (ktent.key.enctype != ticket->enc_part.enctype)
+ continue;
- if ((retval = krb5_kt_get_entry(context, kt, ticket->server,
- ticket->enc_part.kvno,
- enctype, &ktent)))
- return retval;
+ retval = krb5int_server_decrypt_ticket_keyblock(context, &ktent.key, ticket);
+ if (retval == 0) {
+ krb5_principal tmp;
- retval = krb5int_server_decrypt_ticket_keyblock(context,
- &ktent.key, ticket);
- /* Upon error, Free keytab entry first, then return */
+ retval = krb5_copy_principal(context, ktent.principal, &tmp);
+ if (retval == 0) {
+ krb5_free_principal(context, ticket->server);
+ ticket->server = tmp;
+ }
+ (void) krb5_free_keytab_entry_contents(context, &ktent);
+ break;
+ }
+ (void) krb5_free_keytab_entry_contents(context, &ktent);
+ }
+
+ code = krb5_kt_end_seq_get(context, keytab, &cursor);
+ if (code != 0)
+ retval = code;
+ }
+
+map_error:
+ switch (retval) {
+ case KRB5_KT_KVNONOTFOUND:
+ case KRB5_KT_NOTFOUND:
+ case KRB5KRB_AP_ERR_BAD_INTEGRITY:
+ retval = KRB5KRB_AP_WRONG_PRINC;
+ break;
+ default:
+ break;
+ }
- (void) krb5_kt_free_entry(context, &ktent);
return retval;
}
#endif /* LEAN_CLIENT */
decode_krb5_etype_info
decode_krb5_etype_info2
decode_krb5_fast_req
-decode_krb5_pa_fx_fast_request
decode_krb5_kdc_req_body
decode_krb5_pa_enc_ts
decode_krb5_pa_for_user
+decode_krb5_pa_fx_fast_request
decode_krb5_pa_pac_req
+decode_krb5_pa_s4u_x509_user
decode_krb5_padata_sequence
decode_krb5_predicted_sam_response
decode_krb5_priv
encode_krb5_etype_info
encode_krb5_etype_info2
encode_krb5_fast_response
-encode_krb5_pa_fx_fast_reply
encode_krb5_kdc_req_body
encode_krb5_pa_enc_ts
encode_krb5_pa_for_user
+encode_krb5_pa_fx_fast_reply
+encode_krb5_pa_s4u_x509_user
encode_krb5_pa_server_referral_data
encode_krb5_pa_svr_referral_data
encode_krb5_padata_sequence
encode_krb5_priv
encode_krb5_pwd_data
encode_krb5_pwd_sequence
+encode_krb5_s4u_userid
encode_krb5_safe
encode_krb5_sam_challenge
encode_krb5_sam_key
krb5_auth_con_setuseruserkey
krb5_auth_to_rep
krb5_build_principal
+krb5_build_principal_alloc_va
krb5_build_principal_ext
krb5_build_principal_va
-krb5_build_principal_alloc_va
krb5_cc_close
krb5_cc_copy_creds
krb5_cc_default
krb5_free_last_req
krb5_free_pa_data
krb5_free_pa_enc_ts
-krb5_free_pa_pac_req
krb5_free_pa_for_user
+krb5_free_pa_pac_req
+krb5_free_pa_s4u_x509_user
krb5_free_pa_server_referral_data
krb5_free_pa_svr_referral_data
krb5_free_passwd_phrase_element
krb5_get_cred_from_kdc_validate
krb5_get_cred_via_tkt
krb5_get_credentials
+krb5_get_credentials_for_proxy
+krb5_get_credentials_for_user
krb5_get_credentials_renew
krb5_get_credentials_validate
krb5_get_default_config_files
krb5_os_hostaddr
krb5_os_init_context
krb5_os_localaddr
-krb5int_get_domain_realm_mapping
krb5_overridekeyname
krb5_pac_add_buffer
krb5_pac_free
krb5int_find_pa_data
krb5int_foreach_localaddr
krb5int_free_addrlist
+krb5int_get_domain_realm_mapping
krb5int_init_context_kdc
krb5int_initialize_library
krb5int_pac_sign
#define DEFAULT_UDP_PREF_LIMIT 1465
#define HARD_UDP_LIMIT 32700 /* could probably do 64K-epsilon ? */
-#undef DEBUG
+#define DEBUG 1
#ifdef DEBUG
int krb5int_debug_sendto_kdc = 0;
print_flags(unsigned int flags)
{
unsigned int i;
- static char *prflags[] = {
- "DISALLOW_POSTDATED", /* 0x00000001 */
- "DISALLOW_FORWARDABLE", /* 0x00000002 */
- "DISALLOW_TGT_BASED", /* 0x00000004 */
- "DISALLOW_RENEWABLE", /* 0x00000008 */
- "DISALLOW_PROXIABLE", /* 0x00000010 */
- "DISALLOW_DUP_SKEY", /* 0x00000020 */
- "DISALLOW_ALL_TIX", /* 0x00000040 */
- "REQUIRES_PRE_AUTH", /* 0x00000080 */
- "REQUIRES_HW_AUTH", /* 0x00000100 */
- "REQUIRES_PWCHANGE", /* 0x00000200 */
- "UNKNOWN_0x00000400", /* 0x00000400 */
- "UNKNOWN_0x00000800", /* 0x00000800 */
- "DISALLOW_SVR", /* 0x00001000 */
- "PWCHANGE_SERVICE", /* 0x00002000 */
- "SUPPORT_DESMD5", /* 0x00004000 */
- "NEW_PRINC", /* 0x00008000 */
+ static char *prflags[] = {
+ "DISALLOW_POSTDATED", /* 0x00000001 */
+ "DISALLOW_FORWARDABLE", /* 0x00000002 */
+ "DISALLOW_TGT_BASED", /* 0x00000004 */
+ "DISALLOW_RENEWABLE", /* 0x00000008 */
+ "DISALLOW_PROXIABLE", /* 0x00000010 */
+ "DISALLOW_DUP_SKEY", /* 0x00000020 */
+ "DISALLOW_ALL_TIX", /* 0x00000040 */
+ "REQUIRES_PRE_AUTH", /* 0x00000080 */
+ "REQUIRES_HW_AUTH", /* 0x00000100 */
+ "REQUIRES_PWCHANGE", /* 0x00000200 */
+ "UNKNOWN_0x00000400", /* 0x00000400 */
+ "UNKNOWN_0x00000800", /* 0x00000800 */
+ "DISALLOW_SVR", /* 0x00001000 */
+ "PWCHANGE_SERVICE", /* 0x00002000 */
+ "SUPPORT_DESMD5", /* 0x00004000 */
+ "NEW_PRINC", /* 0x00008000 */
+ "UNKNOWN_0x00010000", /* 0x00010000 */
+ "UNKNOWN_0x00020000", /* 0x00020000 */
+ "UNKNOWN_0x00040000", /* 0x00040000 */
+ "UNKNOWN_0x00080000", /* 0x00080000 */
+ "OK_AS_DELEGATE", /* 0x00100000 */
+ "OK_TO_AUTH_AS_DELEGATE", /* 0x00200000 */
+ "NO_AUTH_DATA_REQUIRED", /* 0x00400000 */
+
};
for (i = 0; i < sizeof (prflags) / sizeof (char *); i++) {
for (i = 0; i < k->k_enctype.k_enctype_len; i++) {
printf("\t\t\tenc type: 0x%x\n",
- k->k_enctype.k_enctype_val[i]);
+ k->k_enctype.k_enctype_val[i]);
}
str = k->k_contents.k_contents_val;
krb5_free_enc_sam_response_enc_2);
ktest_empty_enc_sam_response_enc_2(&sam_ch2);
}
+ /****************************************************************/
+ /* encode_krb5_pa_s4u_x509_user */
+ {
+ krb5_pa_s4u_x509_user s4u, *tmp;
+ setup(s4u, "pa_s4u_x509_user",
+ ktest_make_sample_pa_s4u_x509_user);
+ leak_test(s4u, encode_krb5_pa_s4u_x509_user,
+ decode_krb5_pa_s4u_x509_user,
+ krb5_free_pa_s4u_x509_user);
+ ktest_empty_pa_s4u_x509_user(&s4u);
+ }
krb5_free_context(test_context);
return 0;
}
ktest_empty_sam_response(&ref);
}
-
+
+ {
+ setup(krb5_pa_s4u_x509_user,"krb5_pa_s4u_x509_user",ktest_make_sample_pa_s4u_x509_user);
+ decode_run("pa_s4u_x509_user","","30 68 A0 55 30 53 A0 06 02 04 00 CA 14 9A A1 1A 30 18 A0 03 02 01 01 A1 11 30 0F 1B 06 68 66 74 73 61 69 1B 05 65 78 74 72 61 A2 10 1B 0E 41 54 48 45 4E 41 2E 4D 49 54 2E 45 44 55 A3 12 04 10 70 61 5F 73 34 75 5F 78 35 30 39 5F 75 73 65 72 A4 07 03 05 00 80 00 00 00 A1 0F 30 0D A0 03 02 01 01 A1 06 04 04 31 32 33 34",decode_krb5_pa_s4u_x509_user,ktest_equal_pa_s4u_x509_user,krb5_free_pa_s4u_x509_user);
+ ktest_empty_pa_s4u_x509_user(&ref);
+ }
+
#ifdef ENABLE_LDAP
/* ldap sequence_of_keys */
{
acc.encode_krb5_enc_sam_response_enc_2);
ktest_empty_enc_sam_response_enc_2(&sam_ch2);
}
+ /****************************************************************/
+ /* encode_krb5_pa_s4u_x509_user */
+ {
+ krb5_pa_s4u_x509_user s4u;
+ setup(s4u,krb5_pa_s4u_x509_user,"pa_s4u_x509_user",
+ ktest_make_sample_pa_s4u_x509_user);
+ encode_run(s4u,krb5_pa_s4u_x509_user,
+ "pa_s4u_x509_user","",
+ encode_krb5_pa_s4u_x509_user);
+ ktest_empty_pa_s4u_x509_user(&s4u);
+ }
+
#ifdef ENABLE_LDAP
{
ldap_seqof_key_data skd;
return 0;
}
+krb5_error_code ktest_make_sample_pa_s4u_x509_user(p)
+ krb5_pa_s4u_x509_user *p;
+{
+ krb5_error_code retval;
+ krb5_s4u_userid *u = &p->user_id;
+ u->nonce = 13243546;
+ retval = ktest_make_sample_principal(&u->user);
+ if (retval) return retval;
+ u->subject_cert.data = strdup("pa_s4u_x509_user");
+ if (u->subject_cert.data == NULL) return ENOMEM;
+ u->subject_cert.length = strlen(u->subject_cert.data);
+ u->options = 0x80000000;
+ retval = ktest_make_sample_checksum(&p->cksum);
+ if (retval) return retval;
+ return 0;
+}
+
#ifdef ENABLE_LDAP
static krb5_error_code ktest_make_sample_key_data(krb5_key_data *p, int i)
{
ktest_empty_data(&p->sam_sad);
}
+void ktest_empty_pa_s4u_x509_user(p)
+ krb5_pa_s4u_x509_user *p;
+{
+ ktest_destroy_principal(&p->user_id.user);
+ ktest_empty_data(&p->user_id.subject_cert);
+ if (p->cksum.contents) free(p->cksum.contents);
+}
+
#ifdef ENABLE_LDAP
void ktest_empty_ldap_seqof_key_data(ctx, p)
krb5_context ctx;
(krb5_enc_sam_response_enc *p);
krb5_error_code ktest_make_sample_predicted_sam_response(krb5_predicted_sam_response *p);
krb5_error_code ktest_make_sample_enc_sam_response_enc_2(krb5_enc_sam_response_enc_2 *p);
-
+krb5_error_code ktest_make_sample_pa_s4u_x509_user(krb5_pa_s4u_x509_user *p);
#ifdef ENABLE_LDAP
krb5_error_code ktest_make_sample_ldap_seqof_key_data(ldap_seqof_key_data * p);
void ktest_empty_predicted_sam_response(krb5_predicted_sam_response *p);
void ktest_empty_sam_response_2(krb5_sam_response_2 *p);
void ktest_empty_enc_sam_response_enc_2(krb5_enc_sam_response_enc_2 *p);
+void ktest_empty_pa_s4u_x509_user(krb5_pa_s4u_x509_user *p);
#ifdef ENABLE_LDAP
void ktest_empty_ldap_seqof_key_data(krb5_context, ldap_seqof_key_data *p);
return p;
}
+int ktest_equal_pa_s4u_x509_user(ref, var)
+ krb5_pa_s4u_x509_user *ref;
+ krb5_pa_s4u_x509_user *var;
+{
+ int p = TRUE;
+ if (ref == var) return TRUE;
+ else if (ref == NULL || var == NULL) return FALSE;
+ p=p&&scalar_equal(user_id.nonce);
+ p=p&&ptr_equal(user_id.user,ktest_equal_principal_data);
+ p=p&&struct_equal(user_id.subject_cert,ktest_equal_data);
+ p=p&&scalar_equal(user_id.options);
+ p=p&&struct_equal(cksum,ktest_equal_checksum);
+ return p;
+}
#ifdef ENABLE_LDAP
static int equal_key_data(ref, var)
krb5_key_data *ref;
(krb5_etype_info_entry * ref,
krb5_etype_info_entry * var);
+int ktest_equal_pa_s4u_x509_user
+ (krb5_pa_s4u_x509_user *ref,
+ krb5_pa_s4u_x509_user *var);
+
int ktest_equal_ldap_sequence_of_keys(ldap_seqof_key_data *ref,
ldap_seqof_key_data *var);
#endif
encode_krb5_predicted_sam_response: 30 6D A0 13 30 11 A0 03 02 01 01 A1 0A 04 08 31 32 33 34 35 36 37 38 A1 07 03 05 00 00 00 00 09 A2 11 18 0F 31 39 37 30 30 31 30 31 30 30 30 30 31 37 5A A3 03 02 01 12 A4 10 1B 0E 41 54 48 45 4E 41 2E 4D 49 54 2E 45 44 55 A5 1A 30 18 A0 03 02 01 01 A1 11 30 0F 1B 06 68 66 74 73 61 69 1B 05 65 78 74 72 61 A6 07 04 05 68 65 6C 6C 6F
encode_krb5_sam_response_2: 30 42 A0 03 02 01 2B A1 07 03 05 00 80 00 00 00 A2 0C 04 0A 74 72 61 63 6B 20 64 61 74 61 A3 1D 30 1B A0 03 02 01 01 A1 04 02 02 0D 36 A2 0E 04 0C 6E 6F 6E 63 65 20 6F 72 20 73 61 64 A4 05 02 03 54 32 10
encode_krb5_enc_sam_response_enc_2: 30 1F A0 03 02 01 58 A1 18 04 16 65 6E 63 5F 73 61 6D 5F 72 65 73 70 6F 6E 73 65 5F 65 6E 63 5F 32
+encode_krb5_pa_s4u_x509_user: 30 68 A0 55 30 53 A0 06 02 04 00 CA 14 9A A1 1A 30 18 A0 03 02 01 01 A1 11 30 0F 1B 06 68 66 74 73 61 69 1B 05 65 78 74 72 61 A2 10 1B 0E 41 54 48 45 4E 41 2E 4D 49 54 2E 45 44 55 A3 12 04 10 70 61 5F 73 34 75 5F 78 35 30 39 5F 75 73 65 72 A4 07 03 05 00 80 00 00 00 A1 0F 30 0D A0 03 02 01 01 A1 06 04 04 31 32 33 34
. [0] [Integer] 88
. [1] [Octet String] "enc_sam_response_enc_2"
+encode_krb5_pa_s4u_x509_user:
+
+[Sequence/Sequence Of]
+. [0] [Sequence/Sequence Of]
+. . [0] [Integer] 13243546
+. . [1] [Sequence/Sequence Of]
+. . . [0] [Integer] 1
+. . . [1] [Sequence/Sequence Of]
+. . . . [General string] "hftsai"
+. . . . [General string] "extra"
+. . [2] [General string] "ATHENA.MIT.EDU"
+. . [3] [Octet String] "pa_s4u_x509_user"
+. . [4] [Bit String] 0x80000000
+. [1] [Sequence/Sequence Of]
+. . [0] [Integer] 1
+. . [1] [Octet String] "1234"
+
PROG_LIBPATH=-L$(TOPLIBD)
PROG_RPATH=$(KRB5_LIBDIR)
-SRCS= $(srcdir)/t_imp_name.c
+SRCS= $(srcdir)/t_imp_name.c $(srcdir)/t_s4u.c
-OBJS= t_imp_name.o
+OBJS= t_imp_name.o t_s4u.o
-all:: t_imp_name
+all:: t_imp_name t_s4u
t_imp_name: t_imp_name.o $(GSS_DEPLIBS) $(KRB5_BASE_DEPLIBS)
$(CC_LINK) -o t_imp_name t_imp_name.o $(GSS_LIBS) $(KRB5_BASE_LIBS)
+t_s4u: t_s4u.o $(GSS_DEPLIBS) $(KRB5_BASE_DEPLIBS)
+ $(CC_LINK) -o t_s4u t_s4u.o $(GSS_LIBS) $(KRB5_BASE_LIBS)
+
clean::
- $(RM) t_imp_name
+ $(RM) t_imp_name t_s4u
--- /dev/null
+/* -*- mode: c; indent-tabs-mode: nil -*- */
+/*
+ * Copyright 2009 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission. Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <gssapi/gssapi_krb5.h>
+
+/*
+ * Test program for protocol transition (S4U2Self) and constrained delegation
+ * (S4U2Proxy)
+ *
+ * Note: because of name canonicalization, the following tips may help
+ * when configuring with Active Directory:
+ *
+ * - Create a computer account FOO$
+ * - Set the UPN to host/foo.domain (no suffix); this is necessary to
+ * be able to send an AS-REQ as this principal, otherwise you would
+ * need to use the canonical name (FOO$), which will cause principal
+ * comparison errors in gss_accept_sec_context().
+ * - Add a SPN of host/foo.domain
+ * - Configure the computer account to support constrained delegation with
+ * protocol transition (Trust this computer for delegation to specified
+ * services only / Use any authentication protocol)
+ * - Add host/foo.domain to the keytab (possibly easiest to do this
+ * with ktadd)
+ *
+ * For S4U2Proxy to work the TGT must be forwardable too.
+ *
+ * Usage eg:
+ *
+ * kinit -k -t test.keytab -f 'host/test.win.mit.edu@WIN.MIT.EDU'
+ * ./t_s4u delegtest@WIN.MIT.EDU HOST/WIN-EQ7E4AA2WR8.win.mit.edu@WIN.MIT.EDU test.keytab
+ */
+
+static gss_OID_desc spnego_mech = { 6, "\053\006\001\005\005\002" };
+
+int use_spnego = 0;
+
+static void displayStatus_1(m, code, type)
+ char *m;
+ OM_uint32 code;
+ int type;
+{
+ OM_uint32 maj_stat, min_stat;
+ gss_buffer_desc msg;
+ OM_uint32 msg_ctx;
+
+ msg_ctx = 0;
+ while (1) {
+ maj_stat = gss_display_status(&min_stat, code,
+ type, GSS_C_NULL_OID,
+ &msg_ctx, &msg);
+ fprintf(stderr, "%s: %s\n", m, (char *)msg.value);
+ (void) gss_release_buffer(&min_stat, &msg);
+
+ if (!msg_ctx)
+ break;
+ }
+}
+
+static void displayStatus(msg, maj_stat, min_stat)
+ char *msg;
+ OM_uint32 maj_stat;
+ OM_uint32 min_stat;
+{
+ displayStatus_1(msg, maj_stat, GSS_C_GSS_CODE);
+ displayStatus_1(msg, min_stat, GSS_C_MECH_CODE);
+}
+
+static OM_uint32
+displayCanonName(OM_uint32 *minor, gss_name_t name, char *tag)
+{
+ gss_name_t canon;
+ OM_uint32 major, tmp_minor;
+ gss_buffer_desc buf;
+
+ major = gss_canonicalize_name(minor, name,
+ (gss_OID)gss_mech_krb5, &canon);
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_canonicalize_name", major, *minor);
+ return major;
+ }
+
+ major = gss_display_name(minor, canon, &buf, NULL);
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_display_name", major, *minor);
+ gss_release_name(&tmp_minor, &canon);
+ return major;
+ }
+
+ printf("%s:\t%s\n", tag, (char *)buf.value);
+
+ gss_release_buffer(&tmp_minor, &buf);
+ gss_release_name(&tmp_minor, &canon);
+
+ return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+displayOID(OM_uint32 *minor, gss_OID oid, char *tag)
+{
+ OM_uint32 major, tmp_minor;
+ gss_buffer_desc buf;
+
+ major = gss_oid_to_str(minor, oid, &buf);
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_oid_to_str", major, *minor);
+ return major;
+ }
+
+ printf("%s:\t%s\n", tag, (char *)buf.value);
+
+ gss_release_buffer(&tmp_minor, &buf);
+
+ return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+initAcceptSecContext(OM_uint32 *minor,
+ gss_cred_id_t claimant_cred_handle,
+ gss_cred_id_t verifier_cred_handle,
+ gss_cred_id_t *deleg_cred_handle)
+{
+ OM_uint32 major, tmp_minor;
+ gss_buffer_desc token, tmp;
+ gss_ctx_id_t initiator_context = GSS_C_NO_CONTEXT;
+ gss_ctx_id_t acceptor_context = GSS_C_NO_CONTEXT;
+ gss_name_t source_name = GSS_C_NO_NAME;
+ gss_name_t target_name = GSS_C_NO_NAME;
+ OM_uint32 time_rec;
+ gss_OID mech = GSS_C_NO_OID;
+
+ token.value = NULL;
+ token.length = 0;
+
+ tmp.value = NULL;
+ tmp.length = 0;
+
+ *deleg_cred_handle = GSS_C_NO_CREDENTIAL;
+
+ major = gss_inquire_cred(minor, verifier_cred_handle,
+ &target_name, NULL, NULL, NULL);
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_inquire_cred", major, *minor);
+ return major;
+ }
+
+ displayCanonName(minor, target_name, "Target name");
+
+ mech = use_spnego ? (gss_OID)&spnego_mech : (gss_OID)gss_mech_krb5;
+ displayOID(minor, mech, "Target mech");
+
+ major = gss_init_sec_context(minor,
+ claimant_cred_handle,
+ &initiator_context,
+ target_name,
+ mech,
+ GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG,
+ GSS_C_INDEFINITE,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ GSS_C_NO_BUFFER,
+ NULL,
+ &token,
+ NULL,
+ &time_rec);
+
+ if (target_name != GSS_C_NO_NAME)
+ (void) gss_release_name(&tmp_minor, &target_name);
+
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_init_sec_context", major, *minor);
+ return major;
+ }
+
+ (void) gss_delete_sec_context(minor, &initiator_context, NULL);
+ mech = GSS_C_NO_OID;
+
+ major = gss_accept_sec_context(minor,
+ &acceptor_context,
+ verifier_cred_handle,
+ &token,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ &source_name,
+ &mech,
+ &tmp,
+ NULL,
+ &time_rec,
+ deleg_cred_handle);
+
+ if (GSS_ERROR(major))
+ displayStatus("gss_accept_sec_context", major, *minor);
+ else {
+ displayCanonName(minor, source_name, "Source name");
+ displayOID(minor, mech, "Source mech");
+ }
+
+ (void) gss_release_name(&tmp_minor, &source_name);
+ (void) gss_delete_sec_context(&tmp_minor, &acceptor_context, NULL);
+ (void) gss_release_buffer(&tmp_minor, &token);
+ (void) gss_release_buffer(&tmp_minor, &tmp);
+ (void) gss_release_oid(&tmp_minor, &mech);
+
+ return major;
+}
+
+static OM_uint32
+constrainedDelegate(OM_uint32 *minor,
+ gss_OID_set desired_mechs,
+ gss_name_t target,
+ gss_cred_id_t delegated_cred_handle,
+ gss_cred_id_t verifier_cred_handle)
+{
+ OM_uint32 major, tmp_minor;
+ gss_ctx_id_t initiator_context = GSS_C_NO_CONTEXT;
+ gss_name_t cred_name = GSS_C_NO_NAME;
+ OM_uint32 time_rec, lifetime;
+ gss_cred_usage_t usage;
+ gss_buffer_desc token;
+ gss_OID_set mechs;
+
+ printf("Constrained delegation tests follow\n");
+ printf("-----------------------------------\n\n");
+
+ if (gss_inquire_cred(minor, verifier_cred_handle, &cred_name,
+ &lifetime, &usage, NULL) == GSS_S_COMPLETE) {
+ displayCanonName(minor, cred_name, "Proxy name");
+ gss_release_name(&tmp_minor, &cred_name);
+ }
+ displayCanonName(minor, target, "Target name");
+ if (gss_inquire_cred(minor, delegated_cred_handle, &cred_name,
+ &lifetime, &usage, &mechs) == GSS_S_COMPLETE) {
+ displayCanonName(minor, cred_name, "Delegated name");
+ displayOID(minor, &mechs->elements[0], "Delegated mech");
+ gss_release_name(&tmp_minor, &cred_name);
+ }
+
+ printf("\n");
+
+ major = gss_init_sec_context(minor,
+ delegated_cred_handle,
+ &initiator_context,
+ target,
+ mechs ? &mechs->elements[0] :
+ (gss_OID)gss_mech_krb5,
+ GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG,
+ GSS_C_INDEFINITE,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ GSS_C_NO_BUFFER,
+ NULL,
+ &token,
+ NULL,
+ &time_rec);
+ if (GSS_ERROR(major))
+ displayStatus("gss_init_sec_context", major, *minor);
+
+ (void) gss_release_buffer(&tmp_minor, &token);
+ (void) gss_delete_sec_context(&tmp_minor, &initiator_context, NULL);
+ (void) gss_release_oid_set(&tmp_minor, &mechs);
+
+ return major;
+}
+
+int main(int argc, char *argv[])
+{
+ OM_uint32 minor, major;
+ gss_cred_id_t impersonator_cred_handle = GSS_C_NO_CREDENTIAL;
+ gss_cred_id_t user_cred_handle = GSS_C_NO_CREDENTIAL;
+ gss_cred_id_t delegated_cred_handle = GSS_C_NO_CREDENTIAL;
+ gss_name_t user = GSS_C_NO_NAME, target = GSS_C_NO_NAME;
+ gss_OID_set_desc mechs;
+ gss_OID_set actual_mechs = GSS_C_NO_OID_SET;
+ gss_buffer_desc buf;
+
+ if (argc < 2 || argc > 5) {
+ fprintf(stderr, "Usage: %s [--spnego] [user] "
+ "[proxy-target] [keytab]\n", argv[0]);
+ fprintf(stderr, " proxy-target and keytab are optional\n");
+ exit(1);
+ }
+
+ if (strcmp(argv[1], "--spnego") == 0) {
+ use_spnego++;
+ argc--;
+ argv++;
+ }
+
+ buf.value = argv[1];
+ buf.length = strlen((char *)buf.value);
+
+ major = gss_import_name(&minor, &buf,
+ (gss_OID)GSS_KRB5_NT_PRINCIPAL_NAME,
+ &user);
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_import_name(user)", major, minor);
+ goto out;
+ }
+
+ if (argc > 2 && strcmp(argv[2], "-")) {
+ buf.value = argv[2];
+ buf.length = strlen((char *)buf.value);
+
+ major = gss_import_name(&minor, &buf,
+ (gss_OID)GSS_KRB5_NT_PRINCIPAL_NAME,
+ &target);
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_import_name(target)", major, minor);
+ goto out;
+ }
+ } else {
+ target = GSS_C_NO_NAME;
+ }
+
+ if (argc > 3) {
+ major = krb5_gss_register_acceptor_identity(argv[3]);
+ if (GSS_ERROR(major)) {
+ displayStatus("krb5_gss_register_acceptor_identity",
+ major, minor);
+ goto out;
+ }
+ }
+
+ mechs.elements = use_spnego ? (gss_OID)&spnego_mech :
+ (gss_OID)gss_mech_krb5;
+ mechs.count = 1;
+
+ /* get default cred */
+ major = gss_acquire_cred(&minor,
+ GSS_C_NO_NAME,
+ GSS_C_INDEFINITE,
+ &mechs,
+ GSS_C_BOTH,
+ &impersonator_cred_handle,
+ &actual_mechs,
+ NULL);
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_acquire_cred", major, minor);
+ goto out;
+ }
+
+ (void) gss_release_oid_set(&minor, &actual_mechs);
+
+ printf("Protocol transition tests follow\n");
+ printf("-----------------------------------\n\n");
+
+ /* get S4U2Self cred */
+ major = gss_acquire_cred_impersonate_name(&minor,
+ impersonator_cred_handle,
+ user,
+ GSS_C_INDEFINITE,
+ &mechs,
+ GSS_C_INITIATE,
+ &user_cred_handle,
+ &actual_mechs,
+ NULL);
+ if (GSS_ERROR(major)) {
+ displayStatus("gss_acquire_cred_impersonate_name", major, minor);
+ goto out;
+ }
+
+ major = initAcceptSecContext(&minor,
+ user_cred_handle,
+ impersonator_cred_handle,
+ &delegated_cred_handle);
+ if (GSS_ERROR(major))
+ goto out;
+
+ printf("\n");
+
+ if (target != GSS_C_NO_NAME &&
+ delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
+ major = constrainedDelegate(&minor, &mechs, target,
+ delegated_cred_handle,
+ impersonator_cred_handle);
+ } else if (target != GSS_C_NO_NAME) {
+ fprintf(stderr, "Warning: no delegated credentials handle returned\n\n");
+ fprintf(stderr, "Verify:\n\n");
+ fprintf(stderr, " - The TGT for the impersonating service is forwardable\n");
+ fprintf(stderr, " - The T2A4D flag set on the impersonating service's UAC\n");
+ fprintf(stderr, " - The user is not marked sensitive and cannot be delegated\n");
+ fprintf(stderr, "\n");
+ }
+
+out:
+ (void) gss_release_name(&minor, &user);
+ (void) gss_release_name(&minor, &target);
+ (void) gss_release_cred(&minor, &delegated_cred_handle);
+ (void) gss_release_cred(&minor, &impersonator_cred_handle);
+ (void) gss_release_cred(&minor, &user_cred_handle);
+ (void) gss_release_oid_set(&minor, &actual_mechs);
+
+ return GSS_ERROR(major) ? 1 : 0;
+}
+
projects / krb5.git / commitdiff