From b79c6600a0c95b554ebc53a09b42cfeb40dbd9fa Mon Sep 17 00:00:00 2001 From: Danilo Almeida Date: Fri, 4 Feb 2000 21:26:02 +0000 Subject: [PATCH] * kinit.c: Major revamp to support Kerberos 4 compatibility. Code restructured to allow changes to support Kerberos 4 or Kerberos 5 only operation depending on whether dynamic libraries are avialable. Explicit documentation and support files to make it easy to do this will be forthcoming. * Makefile.in: On Windows, use getopt.lib instead of getopt.obj, and add support for getopt_long. git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@11993 dc483132-0cff-0310-8789-dd5450dbe970 --- src/clients/kinit/ChangeLog | 11 + src/clients/kinit/Makefile.in | 7 +- src/clients/kinit/kinit.c | 1046 ++++++++++++++++++++++++++------- 3 files changed, 847 insertions(+), 217 deletions(-) diff --git a/src/clients/kinit/ChangeLog b/src/clients/kinit/ChangeLog index 39d7ec895..0c8a52e0b 100644 --- a/src/clients/kinit/ChangeLog +++ b/src/clients/kinit/ChangeLog @@ -1,3 +1,14 @@ +2000-02-04 Danilo Almeida + + * kinit.c: Major revamp to support Kerberos 4 compatibility. Code + restructured to allow changes to support Kerberos 4 or Kerberos 5 + only operation depending on whether dynamic libraries are + avialable. Explicit documentation and support files to make it + easy to do this will be forthcoming. + + * Makefile.in: On Windows, use getopt.lib instead of getopt.obj, + and add support for getopt_long. + 1999-12-03 Danilo Almeida * Makefile.in: Windows fix for 10/26/99 cleanup. diff --git a/src/clients/kinit/Makefile.in b/src/clients/kinit/Makefile.in index 2308ca22d..cee5fbde7 100644 --- a/src/clients/kinit/Makefile.in +++ b/src/clients/kinit/Makefile.in @@ -6,6 +6,9 @@ BUILDTOP=$(REL)$(U)$(S)$(U) PROG_LIBPATH=-L$(TOPLIBD) PROG_RPATH=$(KRB5_LIBDIR) +##WIN32##LOCALINCLUDES=-I$(BUILDTOP)\util\windows +##WIN32##DEFINES=-DGETOPT_LONG + all-unix:: kinit all-windows:: $(OUTPRE)kinit.exe all-mac:: @@ -13,8 +16,8 @@ all-mac:: kinit: kinit.o $(KRB5_BASE_DEPLIBS) $(CC_LINK) -o $@ kinit.o $(KRB5_BASE_LIBS) -$(OUTPRE)kinit.exe: $(OUTPRE)kinit.obj $(BUILDTOP)\util\windows\$(OUTPRE)getopt.obj $(KLIB) $(CLIB) - link $(EXE_LINKOPTS) -out:$@ $** +$(OUTPRE)kinit.exe: $(OUTPRE)kinit.obj $(BUILDTOP)\util\windows\$(OUTPRE)getopt.lib $(KLIB) $(CLIB) + link $(EXE_LINKOPTS) -out:$@ $** advapi32.lib clean-unix:: $(RM) kinit.o kinit diff --git a/src/clients/kinit/kinit.c b/src/clients/kinit/kinit.c index 777b44e0d..df162ca51 100644 --- a/src/clients/kinit/kinit.c +++ b/src/clients/kinit/kinit.c @@ -28,11 +28,18 @@ */ #include +#ifdef KRB5_KRB4_COMPAT +#include +#define HAVE_KRB524 +#else +#undef HAVE_KRB524 +#endif #include #include +#include #ifdef GETOPT_LONG -#include "getopt.h" +#include #else #ifdef HAVE_UNISTD_H #include @@ -45,40 +52,105 @@ extern char *optarg; extern int optind; extern char *optarg; extern int getopt(); +#endif /* HAVE_UNISTD_H */ +#endif /* GETOPT_LONG */ + +#ifndef _WIN32 +#define GET_PROGNAME(x) (strrchr((x), '/') ? strrchr((x), '/')+1 : (x)) +#else +#define GET_PROGNAME(x) (max(strrchr((x), '/'), strrchr((x), '\\')) + 1, (x)) #endif -#endif -#include "com_err.h" #ifdef HAVE_PWD_H #include - -void get_name_from_passwd_file(program_name, kcontext, me) - char * program_name; - krb5_context kcontext; - krb5_principal * me; +char * get_name_from_os() { struct passwd *pw; - krb5_error_code code; - if (pw = getpwuid((int) getuid())) { - if ((code = krb5_parse_name(kcontext, pw->pw_name, me))) { - com_err (program_name, code, "when parsing name %s", pw->pw_name); - exit(1); - } + if (pw = getpwuid((int) getuid())) + return pw->pw_name; + return 0; +} +#else /* HAVE_PWD_H */ +#ifdef _WIN32 +char * get_name_from_os() +{ + static char name[1024]; + DWORD name_size = sizeof(name); + if (GetUserName(name, &name_size)) { + name[sizeof(name)-1] = 0; /* Just to be extra safe */ + return name; } else { - fprintf(stderr, "Unable to identify user from password file\n"); - exit(1); + return 0; } } -#else /* HAVE_PWD_H */ -void get_name_from_passwd_file(kcontext, me) - krb5_context kcontext; - krb5_principal * me; +#else /* _WIN32 */ +char * get_name_from_os() { - fprintf(stderr, "Unable to identify user\n"); - exit(1); + return 0; } +#endif /* _WIN32 */ #endif /* HAVE_PWD_H */ +static char *progname; + +static char* progname_v5 = 0; +static char* progname_v4 = 0; +static char* progname_v524 = 0; + +static int got_k4 = 0; +static int got_k5 = 0; + +static int authed_k5 = 0; +static int authed_k4 = 0; + +#define KRB4_BACKUP_DEFAULT_LIFE_SECS 10*60*60 /* 10 hours */ + +typedef enum { INIT_PW, INIT_KT, RENEW, VALIDATE } action_type; + +struct k_opts +{ + /* in seconds */ + krb5_deltat starttime; + krb5_deltat lifetime; + krb5_deltat rlife; + + int forwardable; + int proxiable; + int addresses; + + int not_forwardable; + int not_proxiable; + int no_addresses; + + int verbose; + + char* principal_name; + char* service_name; + char* keytab_name; + char* cache_name; + + action_type action; +}; + +struct k5_data +{ + krb5_context ctx; + krb5_ccache cc; + krb5_principal me; + char* name; +}; + +struct k4_data +{ + krb5_deltat lifetime; +#ifdef KRB5_KRB4_COMPAT + char aname[ANAME_SZ + 1]; + char inst[INST_SZ + 1]; + char realm[REALM_SZ + 1]; + char name[ANAME_SZ + 1 + INST_SZ + 1 + REALM_SZ + 1]; +#endif +}; + #ifdef GETOPT_LONG /* if struct[2] == NULL, then long_getopt acts as if the short flag struct[3] was specified. If struct[2] != NULL, then struct[3] is @@ -86,184 +158,220 @@ void get_name_from_passwd_file(kcontext, me) stored in *index, and long_getopt() returns 0. */ struct option long_options[] = { - { "noforwardable", 0, NULL, 'f'+0200 }, - { "noproxiable", 0, NULL, 'p'+0200 }, - { "addresses", 0, NULL, 'A'+0200}, + { "noforwardable", 0, NULL, 'F' }, + { "noproxiable", 0, NULL, 'P' }, + { "addresses", 0, NULL, 'a'}, { "forwardable", 0, NULL, 'f' }, { "proxiable", 0, NULL, 'p' }, - { "noaddresses", 0, NULL, 'A'}, - { "version", 0, NULL, 0x01 }, + { "noaddresses", 0, NULL, 'A' }, { NULL, 0, NULL, 0 } }; + +#define GETOPT(argc, argv, str) getopt_long(argc, argv, str, long_options, 0) +#define USAGE_LONG_FORWARDABLE " | --forwardable | --noforwardable" +#define USAGE_LONG_PROXIABLE " | --proxiable | --noproxiable" +#define USAGE_LONG_ADDRESSES " | --addresses | --noaddresses" +#else +#define GETOPT(argc, argv, str) getopt(argc, argv, str) +#define USAGE_LONG_FORWARDABLE "" +#define USAGE_LONG_PROXIABLE "" +#define USAGE_LONG_ADDRESSES "" #endif -int -main(argc, argv) +void +usage() +{ +#ifdef KRB5_KRB4_COMPAT +#define USAGE_K54_OPT "[-4] [-5] " +#define USAGE_K54_SRVTAB "/srvtab" +#else +#define USAGE_K54_OPT "" +#define USAGE_K54_SRVTAB "" +#endif + + fprintf(stderr, "Usage: %s [-V] " USAGE_K54_OPT + "[-l lifetime] [-r renewable_life] " + "[-f | -F" USAGE_LONG_FORWARDABLE "] " + "[-p | -P" USAGE_LONG_PROXIABLE "] " + "[-A" USAGE_LONG_ADDRESSES "] " + "[-s start_time] [-S target_service] " + "[-k [-t keytab_file]] [-R] [-v] [-c cachename] [principal]\n", + progname); + fprintf(stderr, +#ifdef KRB5_KRB4_COMPAT + "\t-4 Kerberos 4 only, -5 Kerberos 5 only, default is both\n" + "\toptions applicable to Kerberos 5 only:\n" +#endif + "\t\t-v validate\n" + "\t\t-c cache name\n" + "\t\t-f forwardable\n" + "\t\t-F not forwardable\n" + "\t\t-p proxiable\n" + "\t\t-P not proxiable\n" + "\t\t-A do not include addresses\n" + "\t\t-r renewable lifetime\n" + "\t\t-s start time\n" +#ifdef KRB5_KRB4_COMPAT + "\toptions potentially applicable to both:\n" +#endif + "\t\t-R renew\n" + "\t\t-l lifetime\n" + "\t\t-S service\n" + "\t\t-k use keytab" USAGE_K54_SRVTAB "\n" + "\t\t-t filename of keytab" USAGE_K54_SRVTAB " to use\n" + "\t\t-V verbose\n" + ); + exit(2); +} + +char * +parse_options(argc, argv, opts) int argc; char **argv; + struct k_opts* opts; { - krb5_context kcontext; - krb5_principal me = NULL; - krb5_deltat start_time = 0; - krb5_address **addresses = NULL; - krb5_get_init_creds_opt opts; - char *service_name = NULL; - krb5_keytab keytab = NULL; - char *cache_name = NULL; - krb5_ccache ccache = NULL; - enum { INIT_PW, INIT_KT, RENEW, VALIDATE} action; - int errflg = 0, idx, i; - krb5_creds my_creds; krb5_error_code code; + int errflg = 0; + int use_k4_only = 0; + int use_k5_only = 0; + int i; - /* Ensure we can be driven from a pipe */ - if(!isatty(fileno(stdin))) - setvbuf(stdin, 0, _IONBF, 0); - if(!isatty(fileno(stdout))) - setvbuf(stdout, 0, _IONBF, 0); - if(!isatty(fileno(stderr))) - setvbuf(stderr, 0, _IONBF, 0); - - if (code = krb5_init_context(&kcontext)) { - com_err(argv[0], code, "while initializing kerberos library"); - exit(1); - } - - krb5_get_init_creds_opt_init(&opts); - - action = INIT_PW; - - if (strrchr(argv[0], '/')) - argv[0] = strrchr(argv[0], '/')+1; - - while ( -#ifdef GETOPT_LONG - (i = getopt_long(argc, argv, "r:fpAl:s:c:kt:RS:v", - long_options, &idx)) != -1 +#ifdef KRB5_KRB4_COMPAT +#define GETOPT_K54 "45" #else - (i = getopt(argc, argv, "r:fpAl:s:c:kt:RS:v")) != -1 +#define GETOPT_K54 "" #endif - ) { + + while ((i = GETOPT(argc, argv, "r:fpFP" GETOPT_K54 "AVl:s:c:kt:RS:v")) + != -1) { switch (i) { -#ifdef GETOPT_LONG - case 1: /* Print the version */ - printf("%s\n", krb5_version); - exit(0); -#endif + case 'V': + opts->verbose = 1; + break; case 'l': - { - krb5_deltat lifetime; - code = krb5_string_to_deltat(optarg, &lifetime); - if (code != 0 || lifetime == 0) { - fprintf(stderr, "Bad lifetime value %s\n", optarg); - errflg++; - } - krb5_get_init_creds_opt_set_tkt_life(&opts, lifetime); - } - break; + /* Lifetime */ + code = krb5_string_to_deltat(optarg, &opts->lifetime); + if (code != 0 || opts->lifetime == 0) { + fprintf(stderr, "Bad lifetime value %s\n", optarg); + errflg++; + } + break; case 'r': - { - krb5_deltat rlife; - - code = krb5_string_to_deltat(optarg, &rlife); - if (code != 0 || rlife == 0) { - fprintf(stderr, "Bad lifetime value %s\n", optarg); - errflg++; - } - krb5_get_init_creds_opt_set_renew_life(&opts, rlife); - } - break; + /* Renewable Time */ + code = krb5_string_to_deltat(optarg, &opts->rlife); + if (code != 0 || opts->rlife == 0) { + fprintf(stderr, "Bad lifetime value %s\n", optarg); + errflg++; + } + break; case 'f': - krb5_get_init_creds_opt_set_forwardable(&opts, 1); - break; -#ifdef GETOPT_LONG - case 'f'+0200: - krb5_get_init_creds_opt_set_forwardable(&opts, 0); - break; -#endif + opts->forwardable = 1; + break; + case 'F': + opts->not_forwardable = 1; + break; case 'p': - krb5_get_init_creds_opt_set_proxiable(&opts, 1); + opts->proxiable = 1; + break; + case 'P': + opts->not_proxiable = 1; + break; + case 'a': + /* Note: This is supported only with GETOPT_LONG */ + opts->addresses = 1; break; -#ifdef GETOPT_LONG - case 'p'+0200: - krb5_get_init_creds_opt_set_proxiable(&opts, 0); - break; -#endif case 'A': - krb5_get_init_creds_opt_set_address_list(&opts, NULL); + opts->no_addresses = 1; break; -#ifdef GETOPT_LONG - case 'A'+0200: - krb5_os_localaddr(kcontext, &addresses); - krb5_get_init_creds_opt_set_address_list(&opts, addresses); - break; -#endif case 's': - code = krb5_string_to_deltat(optarg, &start_time); - if (code != 0 || start_time == 0) { + code = krb5_string_to_deltat(optarg, &opts->starttime); + if (code != 0 || opts->starttime == 0) { krb5_timestamp abs_starttime; - krb5_timestamp now; code = krb5_string_to_timestamp(optarg, &abs_starttime); if (code != 0 || abs_starttime == 0) { fprintf(stderr, "Bad start time value %s\n", optarg); errflg++; } else { - if ((code = krb5_timeofday(kcontext, &now))) { - com_err(argv[0], code, - "while getting time of day"); - exit(1); - } - - start_time = abs_starttime - now; + opts->starttime = abs_starttime - time(0); } } break; case 'S': - service_name = optarg; + opts->service_name = optarg; break; case 'k': - action = INIT_KT; + opts->action = INIT_KT; break; case 't': - if (keytab == NULL) { - code = krb5_kt_resolve(kcontext, optarg, &keytab); - if (code != 0) { - com_err(argv[0], code, "resolving keytab %s", optarg); - errflg++; - } - } else { - fprintf(stderr, "Only one -t option allowed.\n"); - errflg++; - } - break; + if (opts->keytab_name) + { + fprintf(stderr, "Only one -t option allowed.\n"); + errflg++; + } else { + opts->keytab_name = optarg; + } + break; case 'R': - action = RENEW; + opts->action = RENEW; break; case 'v': - action = VALIDATE; + opts->action = VALIDATE; break; case 'c': - if (ccache == NULL) { - cache_name = optarg; - - code = krb5_cc_resolve (kcontext, cache_name, &ccache); - if (code != 0) { - com_err (argv[0], code, "resolving ccache %s", - cache_name); - errflg++; - } - } else { - fprintf(stderr, "Only one -c option allowed\n"); - errflg++; - } + if (opts->cache_name) + { + fprintf(stderr, "Only one -c option allowed\n"); + errflg++; + } else { + opts->cache_name = optarg; + } break; +#ifdef KRB5_KRB4_COMPAT + case '4': + if (!got_k4) + { + fprintf(stderr, "Kerberos 4 support could not be loaded\n"); + exit(3); + } + use_k4_only = 1; + break; + case '5': + if (!got_k5) + { + fprintf(stderr, "Kerberos 5 support could not be loaded\n"); + exit(3); + } + use_k5_only = 1; + break; +#endif default: errflg++; break; } } + if (use_k5_only && use_k4_only) + { + fprintf(stderr, "Only one of -4 and -5 allowed\n"); + errflg++; + } + if (opts->forwardable && opts->not_forwardable) + { + fprintf(stderr, "Only one of -f and -F allowed\n"); + errflg++; + } + if (opts->proxiable && opts->not_proxiable) + { + fprintf(stderr, "Only one of -p and -P allowed\n"); + errflg++; + } + if (opts->addresses && opts->no_addresses) + { + fprintf(stderr, "Only one of -a and -A allowed\n"); + errflg++; + } + if (argc - optind > 1) { fprintf(stderr, "Extra arguments (starting with \"%s\").\n", argv[optind+1]); @@ -271,95 +379,603 @@ main(argc, argv) } if (errflg) { -#ifdef GETOPT_LONG - fprintf(stderr, "Usage: %s [--version] [-l lifetime] [-r renewable_life] [-f | --forwardable | --noforwardable] [-p | --proxiable | --noproxiable] [-A | --noaddresses | --addresses] [-s start_time] [-S target_service] [-k [-t keytab_file]] [-R] [-v] [-c cachename] [principal]\n", argv[0]); -#else - fprintf(stderr, "Usage: %s [-l lifetime] [-r renewable_life] [-f] [-p] [-A] [-s start_time] [-S target_service] [-k [-t keytab_file]] [-R] [-v] [-c cachename] [principal]\n", argv[0]); -#endif - exit(2); + usage(); } - if (ccache == NULL) { - if ((code = krb5_cc_default(kcontext, &ccache))) { - com_err(argv[0], code, "while getting default ccache"); - exit(1); - } + /* At this point, we know we only have one option selection */ + if (use_k4_only) + got_k5 = 0; + if (use_k5_only) + got_k4 = 0; + + opts->principal_name = (optind == argc-1) ? argv[optind] : 0; + return opts->principal_name; +} + +int +k5_begin(opts, k5, k4) + struct k_opts* opts; + struct k5_data* k5; + struct k4_data* k4; +{ + char* progname = progname_v5; + krb5_error_code code = 0; + + if (!got_k5) + return 0; + + if (code = krb5_init_context(&k5->ctx)) { + com_err(progname, code, "while initializing Kerberos 5 library"); + return 0; + } + if (opts->cache_name) + { + code = krb5_cc_resolve(k5->ctx, opts->cache_name, &k5->cc); + if (code != 0) { + com_err(progname, code, "resolving ccache %s", + opts->cache_name); + return 0; + } + } + else + { + if ((code = krb5_cc_default(k5->ctx, &k5->cc))) { + com_err(progname, code, "while getting default ccache"); + return 0; + } } - if (optind == argc-1) { - /* Use specified name */ - if ((code = krb5_parse_name (kcontext, argv[optind], &me))) { - com_err (argv[0], code, "when parsing name %s",argv[optind]); - exit(1); + if (opts->principal_name) + { + /* Use specified name */ + if ((code = krb5_parse_name(k5->ctx, opts->principal_name, + &k5->me))) { + com_err(progname, code, "when parsing name %s", + opts->principal_name); + return 0; + } + } + else + { + /* No principal name specified */ + if (opts->action == INIT_KT) { + /* Use the default host/service name */ + if (code = krb5_sname_to_principal(k5->ctx, NULL, NULL, + KRB5_NT_SRV_HST, &k5->me)) { + com_err(progname, code, + "when creating default server principal name"); + return 0; + } + } else { + /* Get default principal from cache if one exists */ + if (code = krb5_cc_get_principal(k5->ctx, k5->cc, + &k5->me)) + { + char *name = get_name_from_os(); + if (!name) + { + fprintf(stderr, "Unable to identify user\n"); + return 0; + } + if ((code = krb5_parse_name(k5->ctx, name, + &k5->me))) + { + com_err(progname, code, "when parsing name %s", + name); + return 0; + } + } + } + } + if (code = krb5_unparse_name(k5->ctx, k5->me, + &k5->name)) { + com_err(progname, code, "when unparsing name"); + return 0; + } + opts->principal_name = k5->name; + +#ifdef KRB5_KRB4_COMPAT + if (got_k4) + { + /* Translate to a Kerberos 4 principal */ + code = krb5_524_conv_principal(k5->ctx, k5->me, + k4->aname, k4->inst, k4->realm); + if (code) { + k4->aname[0] = 0; + k4->inst[0] = 0; + k4->realm[0] = 0; } + } +#endif + return 1; +} + +void +k5_end(k5) + struct k5_data* k5; +{ + if (k5->name) + krb5_free_unparsed_name(k5->ctx, k5->name); + if (k5->me) + krb5_free_principal(k5->ctx, k5->me); + if (k5->cc) + krb5_cc_close(k5->ctx, k5->cc); + if (k5->ctx) + krb5_free_context(k5->ctx); + memset(k5, 0, sizeof(*k5)); +} + +int +k4_begin(opts, k4) + struct k_opts* opts; + struct k4_data* k4; +{ + char* progname = progname_v4; + int k_errno = 0; + + if (!got_k4) + return 0; + +#ifdef KRB5_KRB4_COMPAT + if (k4->aname[0]) + goto skip; + + if (opts->principal_name) + { + /* Use specified name */ + if (k_errno = kname_parse(k4->aname, k4->inst, k4->realm, + opts->principal_name)) + { + fprintf(stderr, "%s: %s\n", progname, + krb_get_err_text(k_errno)); + return 0; + } } else { - /* No principal name specified */ - if (action == INIT_KT) { - /* Use the default host/service name */ - if (code = krb5_sname_to_principal(kcontext, NULL, NULL, - KRB5_NT_SRV_HST, &me)) { - com_err(argv[0], code, - "when creating default server principal name"); - exit(1); - } - } else { - /* Get default principal from cache if one exists */ - if (code = krb5_cc_get_principal(kcontext, ccache, &me)) - get_name_from_passwd_file(argv[0], kcontext, &me); + /* No principal name specified */ + if (opts->action == INIT_KT) { + /* Use the default host/service name */ + /* XXX - need to add this functionality */ + fprintf(stderr, "%s: Kerberos 4 srvtab support is not " + "implemented\n", progname); + return 0; + } else { + /* Get default principal from cache if one exists */ + if (k_errno = krb_get_tf_fullname(tkt_string(), k4->aname, + k4->inst, k4->realm)) + { + char *name = get_name_from_os(); + if (!name) + { + fprintf(stderr, "Unable to identify user\n"); + return 0; + } + if (k_errno = kname_parse(k4->aname, k4->inst, k4->realm, + name)) + { + fprintf(stderr, "%s: %s\n", progname, + krb_get_err_text(k_errno)); + return 0; + } + } + } + } + + if (!k4->realm[0]) + krb_get_lrealm(k4->realm, 1); + + if (k4->inst[0]) + sprintf(k4->name, "%s.%s@%s", k4->aname, k4->inst, k4->realm); + else + sprintf(k4->name, "%s@%s", k4->aname, k4->realm); + opts->principal_name = k4->name; + + skip: + if (k4->aname[0] && !k_isname(k4->aname)) + { + fprintf(stderr, "%s: bad Kerberos 4 name format\n", progname); + return 0; + } + + if (k4->inst[0] && !k_isinst(k4->inst)) + { + fprintf(stderr, "%s: bad Kerberos 4 instance format\n", progname); + return 0; + } + + if (k4->realm[0] && !k_isrealm(k4->realm)) + { + fprintf(stderr, "%s: bad Kerberos 4 realm format\n", progname); + return 0; + } +#endif /* KRB5_KRB4_COMPAT */ + return 1; +} + +void +k4_end(k4) + struct k4_data* k4; +{ + memset(k4, 0, sizeof(*k4)); +} + +int +k5_kinit(opts, k5, password) + struct k_opts* opts; + struct k5_data* k5; + char* password; +{ + char* progname = progname_v5; + int notix = 1; + krb5_keytab keytab = 0; + krb5_creds my_creds; + krb5_error_code code = 0; + krb5_get_init_creds_opt options; + + if (!got_k5) + return 0; + + krb5_get_init_creds_opt_init(&options); + memset(&my_creds, 0, sizeof(my_creds)); + + /* + From this point on, we can goto cleanup because my_creds is + initialized. + */ + + if (opts->lifetime) + krb5_get_init_creds_opt_set_tkt_life(&options, opts->lifetime); + if (opts->rlife) + krb5_get_init_creds_opt_set_renew_life(&options, opts->rlife); + if (opts->forwardable) + krb5_get_init_creds_opt_set_forwardable(&options, 1); + if (opts->not_forwardable) + krb5_get_init_creds_opt_set_forwardable(&options, 0); + if (opts->proxiable) + krb5_get_init_creds_opt_set_proxiable(&options, 1); + if (opts->not_proxiable) + krb5_get_init_creds_opt_set_proxiable(&options, 0); + if (opts->addresses) + { + krb5_address **addresses = NULL; + code = krb5_os_localaddr(k5->ctx, &addresses); + if (code != 0) { + com_err(progname, code, "getting local addresses"); + goto cleanup; } + krb5_get_init_creds_opt_set_address_list(&options, addresses); + krb5_free_addresses(k5->ctx, addresses); + } + if (opts->no_addresses) + krb5_get_init_creds_opt_set_address_list(&options, NULL); + + if ((opts->action == INIT_KT) && opts->keytab_name) + { + code = krb5_kt_resolve(k5->ctx, opts->keytab_name, &keytab); + if (code != 0) { + com_err(progname, code, "resolving keytab %s", + opts->keytab_name); + goto cleanup; + } } - - switch (action) { + + switch (opts->action) { case INIT_PW: - code = krb5_get_init_creds_password(kcontext, &my_creds, me, NULL, - krb5_prompter_posix, NULL, - start_time, service_name, - &opts); + code = krb5_get_init_creds_password(k5->ctx, &my_creds, k5->me, + password, krb5_prompter_posix, 0, + opts->starttime, + opts->service_name, + &options); break; case INIT_KT: - code = krb5_get_init_creds_keytab(kcontext, &my_creds, me, keytab, - start_time, service_name, - &opts); + code = krb5_get_init_creds_keytab(k5->ctx, &my_creds, k5->me, + keytab, + opts->starttime, + opts->service_name, + &options); break; case VALIDATE: - code = krb5_get_validated_creds(kcontext, &my_creds, me, ccache, - service_name); + code = krb5_get_validated_creds(k5->ctx, &my_creds, k5->me, k5->cc, + opts->service_name); break; case RENEW: - code = krb5_get_renewed_creds(kcontext, &my_creds, me, ccache, - service_name); + code = krb5_get_renewed_creds(k5->ctx, &my_creds, k5->me, k5->cc, + opts->service_name); break; } if (code) { - if (code == KRB5KRB_AP_ERR_BAD_INTEGRITY) - fprintf (stderr, "%s: Password incorrect\n", argv[0]); + char *doing = 0; + switch (opts->action) { + case INIT_PW: + case INIT_KT: + doing = "getting initial credentials"; + break; + case VALIDATE: + doing = "validating credentials"; + break; + case RENEW: + doing = "renewing credentials"; + break; + } + + /* If got code == KRB5_AP_ERR_V4_REPLY && got_k4, we should + let the user know that maybe he/she wants -4. */ + if (code == KRB5KRB_AP_ERR_V4_REPLY && got_k4) + com_err(progname, code, "while %s\n" + "The KDC doesn't support v5. " + "You may want the -4 option in the future", + doing); + else if (code == KRB5KRB_AP_ERR_BAD_INTEGRITY) + fprintf(stderr, "%s: Password incorrect while %s\n", progname, + doing); else - com_err (argv[0], code, "while getting initial credentials"); - exit(1); + com_err(progname, code, "while %s", doing); + goto cleanup; } - if (code = krb5_cc_initialize(kcontext, ccache, me)) { - com_err (argv[0], code, "when initializing cache %s", - cache_name?cache_name:""); - exit(1); + if (!opts->lifetime) { + /* We need to figure out what lifetime to use for Kerberos 4. */ + opts->lifetime = my_creds.times.endtime - my_creds.times.authtime; } - if (code = krb5_cc_store_cred(kcontext, ccache, &my_creds)) { - com_err (argv[0], code, "while storing credentials"); - exit(1); + if (code = krb5_cc_initialize(k5->ctx, k5->cc, k5->me)) { + com_err(progname, code, "when initializing cache %s", + opts->cache_name?opts->cache_name:""); + goto cleanup; } - if (me) - krb5_free_principal(kcontext, me); + if (code = krb5_cc_store_cred(k5->ctx, k5->cc, &my_creds)) { + com_err(progname, code, "while storing credentials"); + goto cleanup; + } + + notix = 0; + + cleanup: + if (my_creds.client == k5->me) { + my_creds.client = 0; + } + krb5_free_cred_contents(k5->ctx, &my_creds); if (keytab) - krb5_kt_close(kcontext, keytab); - if (ccache) - krb5_cc_close(kcontext, ccache); - if (addresses) - krb5_free_addresses(kcontext, addresses); - - krb5_free_context(kcontext); - - exit(0); + krb5_kt_close(k5->ctx, keytab); + return notix?0:1; +} + +int +k4_kinit(opts, k4, password) + struct k_opts* opts; + struct k4_data* k4; + char* password; +{ + char* progname = progname_v4; + int k_errno = 0; + + if (!got_k4) + return 0; + + if (opts->starttime) + return 0; + +#ifdef KRB5_KRB4_COMPAT + if (!k4->lifetime) + k4->lifetime = opts->lifetime; + if (!k4->lifetime) + k4->lifetime = KRB4_BACKUP_DEFAULT_LIFE_SECS; + + k4->lifetime /= (5 * 60); + if (k4->lifetime < 1) + k4->lifetime = 1; + if (k4->lifetime > 255) + k4->lifetime = 255; + + switch (opts->action) + { + case INIT_PW: + k_errno = krb_get_pw_in_tkt(k4->aname, k4->inst, k4->realm, "krbtgt", + k4->realm, k4->lifetime, password); + + if (k_errno) { + fprintf(stderr, "%s: %s\n", progname, + krb_get_err_text(k_errno)); + if (authed_k5) + fprintf(stderr, "Maybe your KDC does not support v4. " + "Try the -5 option next time.\n"); + return 0; + } + return 1; +#ifndef HAVE_KRB524 + case INIT_KT: + fprintf(stderr, "%s: srvtabs are not supported\n", progname); + return 0; + case RENEW: + fprintf(stderr, "%s: renewal of krb4 tickets is not supported\n", + progname); + return 0; +#endif + } +#endif + return 0; +} + +char* +getvprogname(v) + char *v; +{ + int len = strlen(progname) + 2 + strlen(v) + 2; + char *ret = malloc(len); + if (ret) + sprintf(ret, "%s(v%s)", progname, v); + else + ret = progname; + return ret; +} + +#ifdef HAVE_KRB524 +/* Convert krb5 tickets to krb4. */ +int try_convert524(k5) + struct k5_data* k5; +{ + char * progname = progname_v524; + krb5_error_code code = 0; + int icode = 0; + krb5_principal kpcserver = 0; + krb5_creds *v5creds = 0; + krb5_creds increds; + CREDENTIALS v4creds; + + if (!got_k4 || !got_k5) + return 0; + + increds.client = 0; + + /* or do this directly with krb524_convert_creds_kdc */ + krb524_init_ets(k5->ctx); + + if ((code = krb5_build_principal(k5->ctx, + &kpcserver, + krb5_princ_realm(k5->ctx, k5->me)->length, + krb5_princ_realm(k5->ctx, k5->me)->data, + "krbtgt", + krb5_princ_realm(k5->ctx, k5->me)->data, + NULL))) { + com_err(progname, code, + "while creating service principal name"); + goto cleanup; + } + + memset((char *) &increds, 0, sizeof(increds)); + increds.client = k5->me; + increds.server = kpcserver; + increds.times.endtime = 0; + increds.keyblock.enctype = ENCTYPE_DES_CBC_CRC; + if ((code = krb5_get_credentials(k5->ctx, 0, + k5->cc, + &increds, + &v5creds))) { + com_err(progname, code, + "getting V5 credentials"); + goto cleanup; + } + if ((icode = krb524_convert_creds_kdc(k5->ctx, + v5creds, + &v4creds))) { + com_err(progname, icode, + "converting to V4 credentials"); + goto cleanup; + } + /* this is stolen from the v4 kinit */ + /* initialize ticket cache */ + if ((icode = in_tkt(v4creds.pname, v4creds.pinst) + != KSUCCESS)) { + com_err(progname, icode, + "trying to create the V4 ticket file"); + goto cleanup; + } + /* stash ticket, session key, etc. for future use */ + if ((icode = krb_save_credentials(v4creds.service, + v4creds.instance, + v4creds.realm, + v4creds.session, + v4creds.lifetime, + v4creds.kvno, + &(v4creds.ticket_st), + v4creds.issue_date))) { + com_err(progname, icode, + "trying to save the V4 ticket"); + goto cleanup; + } + + cleanup: + memset(&v4creds, 0, sizeof(v4creds)); + krb5_free_creds(k5->ctx, v5creds); + increds.client = 0; + krb5_free_cred_contents(k5->ctx, &increds); + krb5_free_principal(k5->ctx, kpcserver); + return !(code || icode); +} +#endif /* HAVE_KRB524 */ + +int +main(argc, argv) + int argc; + char **argv; +{ + struct k_opts opts; + struct k5_data k5; + struct k4_data k4; + char password[255]; + + progname = GET_PROGNAME(argv[0]); + progname_v5 = getvprogname("5"); + progname_v4 = getvprogname("4"); + progname_v524 = getvprogname("524"); + + /* Ensure we can be driven from a pipe */ + if(!isatty(fileno(stdin))) + setvbuf(stdin, 0, _IONBF, 0); + if(!isatty(fileno(stdout))) + setvbuf(stdout, 0, _IONBF, 0); + if(!isatty(fileno(stderr))) + setvbuf(stderr, 0, _IONBF, 0); + + got_k5 = 1; +#ifdef KRB5_KRB4_COMPAT + got_k4 = 1; +#endif + + memset(&opts, 0, sizeof(opts)); + opts.action = INIT_PW; + + memset(&k5, 0, sizeof(k5)); + memset(&k4, 0, sizeof(k4)); + + parse_options(argc, argv, &opts); + + got_k5 = k5_begin(&opts, &k5, &k4); + got_k4 = k4_begin(&opts, &k4); + + if (opts.action == INIT_PW) + { + char prompt[255]; + int pwsize = sizeof(password); + krb5_error_code code; + + sprintf(prompt, "Password for %s: ", opts.principal_name); + password[0] = 0; + /* + Note: krb5_read_password does not actually look at the + context, so we're ok even if we don't have a context. If + we cannot dynamically load krb5, we can substitute any + decent read password function instead of the krb5 one. + */ + code = krb5_read_password(k5.ctx, prompt, 0, password, &pwsize); + if (code || pwsize == 0) + { + fprintf(stderr, "Error while reading password for '%s'\n", + opts.principal_name); + memset(password, 0, sizeof(password)); + exit(1); + } + } + + authed_k5 = k5_kinit(&opts, &k5, password); + authed_k4 = k4_kinit(&opts, &k4, password); + memset(password, 0, sizeof(password)); + +#ifdef HAVE_KRB524 + if (!authed_k4 && authed_k5) + authed_k4 = try_convert524(&k5); +#endif + + if (authed_k5 && opts.verbose) + fprintf(stderr, "Authenticated to Kerberos v5\n"); + if (authed_k4 && opts.verbose) + fprintf(stderr, "Authenticated to Kerberos v4\n"); + + k5_end(&k5); + k4_end(&k4); + + if ((got_k5 && !authed_k5) || (got_k4 && !authed_k4)) + exit(1); + return 0; } -- 2.26.2