--- /dev/null
+/*
+ * $Source$
+ * $Author$
+ *
+ * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
+ * of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
+ */
+
+#ifndef lint
+static char *rcsid_kerberos_c =
+"$Header$";
+#endif /* lint */
+
+#ifdef __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+#include <mit-copyright.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <signal.h>
+#include <sgtty.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/file.h>
+#include <ctype.h>
+#include <syslog.h>
+
+/* v4 include files:
+ */
+#include <krb.h>
+#include <des.h>
+#include <klog.h>
+#include <prot.h>
+#include <krb_db.h>
+#include <kdc.h>
+
+extern int errno;
+
+static struct sockaddr_in sin = {AF_INET};
+int f;
+
+/* XXX several files in libkdb know about this */
+char *progname;
+
+static Key_schedule master_key_schedule;
+static C_Block master_key;
+
+static struct timeval kerb_time;
+static Principal a_name_data; /* for requesting user */
+static Principal s_name_data; /* for services requested */
+static C_Block session_key;
+/*
+static C_Block user_key;
+static C_Block service_key;
+*/
+static u_char master_key_version;
+/*
+static char k_instance[INST_SZ];
+*/
+static char log_text[128];
+static char *lt;
+static int more;
+
+/* static int mflag; /* Are we invoked manually? */
+/* static int lflag; /* Have we set an alterate log file? */
+/* static char *log_file; /* name of alt. log file */
+/* static int nflag; /* don't check max age */
+/* static int rflag; /* alternate realm specified */
+
+/* fields within the received request packet */
+static u_char req_msg_type;
+static u_char req_version;
+static char *req_name_ptr;
+static char *req_inst_ptr;
+static char *req_realm_ptr;
+/*
+static u_char req_no_req;
+*/
+static u_long req_time_ws;
+
+int req_act_vno = KRB_PROT_VERSION; /* Temporary for version skew */
+
+static char local_realm[REALM_SZ];
+
+/* statistics */
+/* static long q_bytes; /* current bytes remaining in queue */
+/* static long q_n; /* how many consecutive non-zero
+ * q_bytes */
+/*
+static long max_q_bytes;
+static long max_q_n; */
+static long n_auth_req;
+static long n_appl_req;
+/* static long n_packets;
+static long n_user;
+static long n_server; */
+
+extern char *sys_errlist[];
+/* static long max_age = -1; */
+static long pause_int = -1;
+
+/* static void check_db_age(); */
+static void hang();
+
+/*
+ * Print usage message and exit.
+ */
+static void usage()
+{
+ fprintf(stderr, "Usage: %s [-s] [-m] [-n] [-p pause_seconds]%s%s\n", progname,
+ " [-a max_age] [-l log_file] [-r realm]"
+ ," [database_pathname]"
+ );
+ exit(1);
+}
+
+#ifndef BACKWARD_COMPAT
+main(argc, argv)
+ int argc;
+ char **argv;
+{
+ struct sockaddr_in from;
+ register int n;
+ int on = 1;
+ int child;
+ struct servent *sp;
+ int fromlen;
+ static KTEXT_ST pkt_st;
+ KTEXT pkt = &pkt_st;
+ Principal *p;
+ int more, kerror;
+ C_Block key;
+ int c;
+ extern char *optarg;
+ extern int optind;
+
+ progname = argv[0];
+
+ while ((c = getopt(argc, argv, "snmp:a:l:r:")) != EOF) {
+ switch(c) {
+ case 's':
+ /*
+ * Set parameters to slave server defaults.
+ */
+ if (max_age == -1 && !nflag)
+ max_age = ONE_DAY; /* 24 hours */
+ if (pause_int == -1)
+ pause_int = FIVE_MINUTES; /* 5 minutes */
+ if (lflag == 0) {
+ log_file = KRBSLAVELOG;
+ lflag++;
+ }
+ break;
+ case 'n':
+ max_age = -1; /* don't check max age. */
+ nflag++;
+ break;
+ case 'm':
+ mflag++; /* running manually; prompt for master key */
+ break;
+ case 'p':
+ /* Set pause interval. */
+ if (!isdigit(optarg[0]))
+ usage();
+ pause_int = atoi(optarg);
+ if ((pause_int < 5) || (pause_int > ONE_HOUR)) {
+ fprintf(stderr, "pause_int must be between 5 and 3600 seconds.\n");
+ usage();
+ }
+ break;
+ case 'a':
+ /* Set max age. */
+ if (!isdigit(optarg[0]))
+ usage();
+ max_age = atoi(optarg);
+ if ((max_age < ONE_HOUR) || (max_age > THREE_DAYS)) {
+ fprintf(stderr, "max_age must be between one hour and three days, in seconds\n");
+ usage();
+ }
+ break;
+ case 'l':
+ /* Set alternate log file */
+ lflag++;
+ log_file = optarg;
+ break;
+ case 'r':
+ /* Set realm name */
+ rflag++;
+ strcpy(local_realm, optarg);
+ break;
+ default:
+ usage();
+ break;
+ }
+ }
+
+ if (optind == (argc-1)) {
+ if (kerb_db_set_name(argv[optind]) != 0) {
+ fprintf(stderr, "Could not set alternate database name\n");
+ exit(1);
+ }
+ optind++;
+ }
+
+ if (optind != argc)
+ usage();
+
+ printf("Kerberos server starting\n");
+
+ if ((!nflag) && (max_age != -1))
+ printf("\tMaximum database age: %d seconds\n", max_age);
+ if (pause_int != -1)
+ printf("\tSleep for %d seconds on error\n", pause_int);
+ else
+ printf("\tSleep forever on error\n");
+ if (mflag)
+ printf("\tMaster key will be entered manually\n");
+
+ printf("\tLog file is %s\n", lflag ? log_file : KRBLOG);
+
+ if (lflag)
+ kset_logfile(log_file);
+
+ /* find our hostname, and use it as the instance */
+ if (gethostname(k_instance, INST_SZ)) {
+ fprintf(stderr, "%s: gethostname error\n", progname);
+ exit(1);
+ }
+
+ if ((sp = getservbyname("kerberos", "udp")) == 0) {
+ fprintf(stderr, "%s: udp/kerberos unknown service\n", progname);
+ exit(1);
+ }
+ sin.sin_port = sp->s_port;
+
+ if ((f = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+ fprintf(stderr, "%s: Can't open socket\n", progname);
+ exit(1);
+ }
+ if (setsockopt(f, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
+ fprintf(stderr, "%s: setsockopt (SO_REUSEADDR)\n", progname);
+
+ if (bind(f, &sin, S_AD_SZ, 0) < 0) {
+ fprintf(stderr, "%s: Can't bind socket\n", progname);
+ exit(1);
+ }
+ /* do all the database and cache inits */
+ if (n = kerb_init()) {
+ if (mflag) {
+ printf("Kerberos db and cache init ");
+ printf("failed = %d ...exiting\n", n);
+ exit(-1);
+ } else {
+ klog(L_KRB_PERR,
+ "Kerberos db and cache init failed = %d ...exiting", n);
+ hang();
+ }
+ }
+
+ /* Make sure database isn't stale */
+ check_db_age();
+
+ /* setup master key */
+ if (kdb_get_master_key (mflag, master_key, master_key_schedule) != 0) {
+ klog (L_KRB_PERR, "kerberos: couldn't get master key.\n");
+ exit (-1);
+ }
+ kerror = kdb_verify_master_key (master_key, master_key_schedule, stdout);
+ if (kerror < 0) {
+ klog (L_KRB_PERR, "Can't verify master key.");
+ bzero (master_key, sizeof (master_key));
+ bzero (master_key_schedule, sizeof (master_key_schedule));
+ exit (-1);
+ }
+
+ master_key_version = (u_char) kerror;
+
+ fprintf(stdout, "\nCurrent Kerberos master key version is %d\n",
+ master_key_version);
+
+ if (!rflag) {
+ /* Look up our local realm */
+ krb_get_lrealm(local_realm, 1);
+ }
+ fprintf(stdout, "Local realm: %s\n", local_realm);
+ fflush(stdout);
+
+ if (set_tgtkey(local_realm)) {
+ /* Ticket granting service unknown */
+ klog(L_KRB_PERR, "Ticket granting ticket service unknown");
+ fprintf(stderr, "Ticket granting ticket service unknown\n");
+ exit(1);
+ }
+ if (mflag) {
+ if ((child = fork()) != 0) {
+ printf("Kerberos started, PID=%d\n", child);
+ exit(0);
+ }
+ setup_disc();
+ }
+ /* receive loop */
+ for (;;) {
+ fromlen = S_AD_SZ;
+ n = recvfrom(f, pkt->dat, MAX_PKT_LEN, 0, &from, &fromlen);
+ if (n > 0) {
+ pkt->length = n;
+ pkt->mbz = 0; /* force zeros to catch runaway strings */
+ /* see what is left in the input queue */
+ ioctl(f, FIONREAD, &q_bytes);
+ gettimeofday(&kerb_time, NULL);
+ q_n++;
+ max_q_n = max(max_q_n, q_n);
+ n_packets++;
+ klog(L_NET_INFO,
+ "q_byt %d, q_n %d, rd_byt %d, mx_q_b %d, mx_q_n %d, n_pkt %d",
+ q_bytes, q_n, n, max_q_bytes, max_q_n, n_packets, 0);
+ max_q_bytes = max(max_q_bytes, q_bytes);
+ if (!q_bytes)
+ q_n = 0; /* reset consecutive packets */
+ kerberos(&from, pkt);
+ } else
+ klog(L_NET_ERR,
+ "%s: bad recvfrom n = %d errno = %d", progname, n, errno, 0);
+ }
+}
+#else /* BACKWARD_COMPAT */
+
+/* v4/v5 backwards-compatibility stub routines,
+ * which allow the v5 server to handle v4 packets
+ * by invoking substantially-unaltered v4 server code.
+ * this is only necessary during the installation's conversion to v5.
+ * process_v4() is invoked by v5's dispatch() routine;
+ * when the v4 server needs to access the v5 database,
+ * it calls the other stubs.
+ *
+ * until all kerberized application-programs are updated,
+ * this approach inflates the v5 server's code size,
+ * but it's easier to debug than a concurrent, subordinate v4 server would be.
+ */
+
+/*
+ * v5 include files:
+ */
+#include <krb5/krb5.h>
+#include <krb5/base-defs.h>
+#include <krb5/encryption.h>
+#include <krb5/wordsize.h>
+#include <krb5/mit-des.h>
+#include <krb5/kdb.h>
+
+static krb5_error_code retval;
+static krb5_data *response;
+void bzero(), bcopy(), com_err(), sleep();
+void kerberos_v4(), kerb_err_reply();
+char *free(), *malloc(), *strcpy(), *vklog();
+int strlen();
+krb5_error_code krb5_timeofday(), krb5_get_default_realm();
+
+krb5_error_code
+process_v4( pkt, client_fulladdr, resp)
+const krb5_data *pkt;
+krb5_fulladdr *client_fulladdr;
+krb5_data **resp;
+{
+ struct sockaddr_in client_sockaddr;
+ krb5_address *addr = client_fulladdr->address;
+ krb5_error_code retval;
+ KTEXT_ST v4_pkt;
+
+ if (retval = krb5_timeofday((krb5_timestamp *) &kerb_time.tv_sec))
+ return(retval);
+
+ if (*local_realm); /* local-realm name already set up */
+ else if (retval =
+ krb5_get_default_realm( sizeof( local_realm), local_realm)) {
+ com_err("KRBV4KDC", retval, "while attempting to get default realm");
+ exit(1);
+ }
+ /* convert client_fulladdr to client_sockaddr:
+ */
+ client_sockaddr.sin_family = AF_INET;
+ client_sockaddr.sin_port = client_fulladdr->port;
+ bcopy( addr->contents, &client_sockaddr.sin_addr,
+ sizeof client_sockaddr.sin_addr);
+ bzero( &client_sockaddr.sin_zero, sizeof client_sockaddr.sin_zero);
+
+ /* convert v5 packet structure to v5's.
+ * this copy is gross, but necessary:
+ */
+ v4_pkt.length = pkt->length;
+ bcopy( pkt->data, &v4_pkt.dat, pkt->length);
+
+ kerberos_v4( &client_sockaddr, &v4_pkt);
+ *resp = response;
+ return(retval);
+}
+/* convert k4's klog() levels into corresponding errors for v5: */
+int type_2_v5err[] = { 0, /* 0 No error */
+ KDC_ERR_NONE, /* L_NET_ERR 1 Error in network code */
+ KDC_ERR_NONE, /* L_NET_INFO 2 Info on network activity */
+ KRB_AP_ERR_BADVERSION, /* L_KRB_PERR 3 Kerberos protocol errors */
+ KDC_ERR_NONE, /* L_KRB_PINFO 4 Kerberos protocol info */
+ KDC_ERR_NONE, /* L_INI_REQ 5 Request for initial ticket */
+ KRB_AP_ERR_BADVERSION, /* L_NTGT_INTK 6 Initial request not for TGT*/
+ KDC_ERR_NONE, /* L_DEATH_REQ 7 Request for server death */
+ KDC_ERR_NONE, /* L_TKT_REQ 8 All ticket requests w/ tgt */
+ KDC_ERR_SERVICE_EXP, /* L_ERR_SEXP 9 Service expired */
+ KDC_ERR_C_OLD_MAST_KVNO, /* L_ERR_MKV 10 Master key version old */
+ KDC_ERR_NULL_KEY, /* L_ERR_NKY 11 User's key is null */
+ KDC_ERR_PRINCIPAL_NOT_UNIQUE, /* L_ERR_NUN 12 Principal not unique */
+ KDC_ERR_C_PRINCIPAL_UNKNOWN, /* L_ERR_UNK 13 Principal Unknown */
+ KDC_ERR_NONE, /* L_ALL_REQ 14 All requests */
+ KDC_ERR_NONE, /* L_APPL_REQ 15 Application requests w/ tgt*/
+ KRB_AP_ERR_BADVERSION /* L_KRB_PWARN 16 Protocol warning messages */
+};
+#define klog v4_klog
+#ifdef __STDC__
+char * v4_klog( int type, const char *format, ...)
+#else
+char * v4_klog( type, format, va_alist)
+ int type;
+ char *format;
+ va_dcl
+#endif
+{
+ char *r;
+ va_list pvar;
+#ifdef __STDC__
+ va_start(pvar, format);
+#else
+ va_start(pvar);
+#endif
+ r = vklog( type, format, pvar);
+ va_end(pvar);
+ return( r);
+}
+char * vklog( type, format, ap)
+ int type;
+ char *format;
+ va_list ap;
+{
+ long now;
+ char *month_sname();
+ struct tm *tm;
+
+ time(&now);
+ tm = localtime(&now);
+
+ sprintf(log_text,"%2d-%s-%02d %02d:%02d:%02d ",tm->tm_mday,
+ month_sname(tm->tm_mon + 1),tm->tm_year,
+ tm->tm_hour, tm->tm_min, tm->tm_sec);
+ com_err("PROCESS_V4", 0, log_text);
+ vsprintf( log_text, format, ap);
+ com_err("PROCESS_V4", 0, log_text);
+ retval = type_2_v5err[ type];
+ return( log_text);
+}
+static
+int sendto(s, msg, len, flags, to, to_len)
+int s;
+const char *msg;
+int len, flags;
+const struct sockaddr *to;
+int to_len;
+{
+ if ( !(response = (krb5_data *) malloc( sizeof *response))) {
+ return ENOMEM;
+ }
+ if ( !(response->data = (char *) malloc( len))) {
+ krb5_free_data( response);
+ return ENOMEM;
+ }
+ response->length = len;
+ bcopy( msg, response->data, len);
+ return( 0);
+}
+static void
+hang()
+{
+ if (pause_int == -1) {
+ klog(L_KRB_PERR, "Kerberos will pause so as not to loop init");
+ /* for (;;)
+ pause(); */
+ } else {
+ char buf[256];
+ sprintf(buf,
+ "Kerberos will wait %d seconds before dying so as not to loop init",
+ pause_int);
+ klog(L_KRB_PERR, buf);
+ sleep(pause_int);
+ klog(L_KRB_PERR, "Do svedania....\n");
+ /* exit(1); */
+ }
+}
+#define kdb_encrypt_key( in, out, mk, mks, e_d_flag)
+#define LONGLEN 4
+extern krb5_encrypt_block master_encblock;
+
+/* take a v5 keyblock, masquerading as a v4 key,
+ * decrypt it, and convert the resulting v5 keyblock
+ * to a real v4 key.
+ * this is ugly, but it saves changing more v4 code.
+ */
+int
+compat_decrypt_key (in5, out4)
+ krb5_keyblock *in5;
+ C_Block out4;
+{
+ krb5_keyblock out5;
+ int retval = -1;
+
+ out5.contents = NULL;
+ if ( krb5_kdb_decrypt_key( &master_encblock, in5, &out5)) {
+ lt = klog(L_DEATH_REQ, "KDC can't decrypt principal's key.");
+ }
+ if ( ! out5.contents) return( retval);
+ if ( out5.length != MIT_DES_KEYSIZE) {
+ lt = klog( L_DEATH_REQ,"internal keysize error in kdc");
+ }
+ else {
+ retval = 0;
+ bcopy( out5.contents, out4, out5.length);
+ }
+ bzero( out5.contents, out5.length);
+ xfree( out5.contents);
+ return( retval);
+}
+/* array of name-components + NULL ptr
+ */
+static krb5_data search_stg[3];
+static krb5_data *search[4] ={ &search_stg[0], &search_stg[1], &search_stg[2]};
+#define MIN5 300
+#define HR21 255
+
+int
+kerb_get_principal(name, inst, principal, maxn, more)
+ char *name; /* could have wild card */
+ char *inst; /* could have wild card */
+ Principal *principal;
+ unsigned int maxn; /* max number of name structs to return */
+ int *more; /* more tuples than room for */
+{
+ krb5_db_entry entries; /* filled in by krb5_db_get_principal() */
+ int nprinc; /* how many found */
+ krb5_boolean more5; /* are there more? */
+ C_Block k;
+ short toggle = 0;
+ int i, time;
+ unsigned long *date;
+ char* text;
+ struct tm *tp;
+
+ if ( maxn > 1) {
+ lt = klog(L_DEATH_REQ, "KDC V4 is requesting too many principals");
+ return( 0);
+ }
+ /* begin setting up the principal structure
+ * with the first info we have:
+ */
+ bcopy( name, principal->name, 1 + strlen( name));
+ bcopy( inst, principal->instance, 1 + strlen( inst));
+
+ /* the principal-name format changed between v4 & v5:
+ * v4: name.instance@realm
+ * v5: realm/name/instance
+ * in v5, null instance means the null-component doesn't exist.
+ */
+ search_stg[0].data = local_realm;
+ search_stg[1].data = name;
+ search_stg[2].data = inst;
+ for ( i = 0; i < 3; i++) {
+ if (! search[i]) search[i] = &search_stg[i];
+ if (!*( search[i]->data)) search[i] = NULL;
+ else search[i]->length = strlen( search[i]->data);
+ }
+ if (retval = krb5_db_get_principal( search, &entries, &nprinc, &more5)) {
+ more = 0;
+ return( 0);
+ }
+ principal->key_low = principal->key_high = 0;
+
+ if ( nprinc < 1) {
+ goto cleanup;
+ } else if ( entries.key.keytype != KEYTYPE_DES) {
+ lt = klog(L_KRB_PERR, "KDC V4: principal %s.%s has non-DES keytype %d",
+ (int) name, (int) inst, entries.key.keytype);
+ nprinc = 0;
+ goto cleanup;
+ } else if (! compat_decrypt_key( &entries.key, k)) {
+ bcopy( k, &principal->key_low, LONGLEN);
+ bcopy((long *) k + 1, &principal->key_high, LONGLEN);
+ }
+ /* convert v5's entries struct to v4's Principal struct:
+ * v5's time-unit for lifetimes is 1 sec, while v4 uses 5 minutes.
+ */
+ time = (entries.max_life + MIN5 - 1) / MIN5;
+ principal->max_life = time > HR21 ? HR21 : (unsigned char) time;
+ principal->exp_date = (unsigned long) entries.expiration;
+ principal->mod_date = (unsigned long) entries.mod_date;
+ principal->attributes = 0;
+ principal->kdc_key_ver = entries.mkvno;
+ principal->key_version = entries.kvno;
+
+ /* set up v4 format of each date's text:
+ */
+ for ( date = &principal->exp_date, text = principal->exp_date_txt;
+ toggle ^= 1;
+ date = &principal->mod_date, text = principal->mod_date_txt) {
+ tp = localtime( (time_t *) date);
+ sprintf( text, "%4d-%02d-%02d",
+ tp->tm_year > 1900 ? tp->tm_year : tp->tm_year + 1900,
+ tp->tm_mon + 1, tp->tm_mday); /* January is 0, not 1 */
+ }
+cleanup:
+ /* free the storage held by the v5 entry struct,
+ * which was allocated by krb5_db_get_principal().
+ * this routine clears the keyblock's contents for us.
+ */
+ krb5_db_free_principal( &entries, nprinc);
+
+ *more = (int) more5 || (nprinc > maxn);
+ return( nprinc);
+}
+void
+#endif /* BACKWARD_COMPAT */
+
+kerberos_v4(client, pkt)
+ struct sockaddr_in *client;
+ KTEXT pkt;
+{
+ static KTEXT_ST rpkt_st;
+ KTEXT rpkt = &rpkt_st;
+ static KTEXT_ST ciph_st;
+ KTEXT ciph = &ciph_st;
+ static KTEXT_ST tk_st;
+ KTEXT tk = &tk_st;
+ static KTEXT_ST auth_st;
+ KTEXT auth = &auth_st;
+ AUTH_DAT ad_st;
+ AUTH_DAT *ad = &ad_st;
+
+
+ static struct in_addr client_host;
+ static int msg_byte_order;
+ static int swap_bytes;
+ static u_char k_flags;
+ /* char *p_name, *instance; */
+ u_long lifetime = 0;
+ int i;
+ C_Block key;
+ Key_schedule key_s;
+ char *ptr;
+
+
+
+ ciph->length = 0;
+
+ client_host = client->sin_addr;
+
+ /* eval macros and correct the byte order and alignment as needed */
+ req_version = pkt_version(pkt); /* 1 byte, version */
+ req_msg_type = pkt_msg_type(pkt); /* 1 byte, Kerberos msg type */
+
+ req_act_vno = req_version;
+
+ /* check packet version */
+ if (req_version != KRB_PROT_VERSION) {
+ lt = klog(L_KRB_PERR,
+ "KRB prot version mismatch: KRB =%d request = %d",
+ KRB_PROT_VERSION, req_version, 0);
+ /* send an error reply */
+ req_name_ptr = req_inst_ptr = req_realm_ptr = "";
+ kerb_err_reply(client, pkt, KERB_ERR_PKT_VER, lt);
+ return;
+ }
+ msg_byte_order = req_msg_type & 1;
+
+ swap_bytes = 0;
+ if (msg_byte_order != HOST_BYTE_ORDER) {
+ swap_bytes++;
+ }
+ klog(L_KRB_PINFO,
+ "Prot version: %d, Byte order: %d, Message type: %d",
+ (int) req_version, msg_byte_order, req_msg_type);
+
+ switch (req_msg_type & ~1) {
+
+ case AUTH_MSG_KDC_REQUEST:
+ {
+ /* u_long time_ws; /* Workstation time */
+ u_long req_life; /* Requested liftime */
+ char *service; /* Service name */
+ char *instance; /* Service instance */
+ /* int kerno; /* Kerberos error number */
+ n_auth_req++;
+ tk->length = 0;
+ k_flags = 0; /* various kerberos flags */
+
+
+ /* set up and correct for byte order and alignment */
+ req_name_ptr = (char *) pkt_a_name(pkt);
+ req_inst_ptr = (char *) pkt_a_inst(pkt);
+ req_realm_ptr = (char *) pkt_a_realm(pkt);
+ bcopy(pkt_time_ws(pkt), &req_time_ws, sizeof(req_time_ws));
+ /* time has to be diddled */
+ if (swap_bytes) {
+ swap_u_long(req_time_ws);
+ }
+ ptr = (char *) pkt_time_ws(pkt) + 4;
+
+ req_life = (u_long) (*ptr++);
+
+ service = ptr;
+ instance = ptr + strlen(service) + 1;
+
+ rpkt = &rpkt_st;
+ klog(L_INI_REQ,
+ "Initial ticket request Host: %s User: \"%s\" \"%s\"",
+ inet_ntoa(client_host), req_name_ptr, req_inst_ptr, 0);
+
+ if (i = check_princ(req_name_ptr, req_inst_ptr, 0,
+ &a_name_data)) {
+ kerb_err_reply(client, pkt, i, lt);
+ return;
+ }
+ tk->length = 0; /* init */
+ if (strcmp(service, "krbtgt"))
+ klog(L_NTGT_INTK,
+ "INITIAL request from %s.%s for %s.%s", (int) req_name_ptr,
+ (int) req_inst_ptr, (int) service, (int) instance, 0);
+ /* this does all the checking */
+ if (i = check_princ(service, instance, lifetime,
+ &s_name_data)) {
+ kerb_err_reply(client, pkt, i, lt);
+ return;
+ }
+ /* Bound requested lifetime with service and user */
+ lifetime = min(req_life, ((u_long) s_name_data.max_life));
+ lifetime = min(lifetime, ((u_long) a_name_data.max_life));
+#ifdef NOENCRYPTION
+ bzero(session_key, sizeof(C_Block));
+#else
+ /* random session key */
+ random_key(session_key);
+#endif
+
+ /* unseal server's key from master key */
+ bcopy(&s_name_data.key_low, key, 4);
+ bcopy(&s_name_data.key_high, ((long *) key) + 1, 4);
+ kdb_encrypt_key(key, key, master_key,
+ master_key_schedule, DECRYPT);
+ /* construct and seal the ticket */
+ krb_create_ticket(tk, k_flags, a_name_data.name,
+ a_name_data.instance, local_realm,
+ client_host.s_addr, session_key, lifetime, kerb_time.tv_sec,
+ s_name_data.name, s_name_data.instance, key);
+ bzero(key, sizeof(key));
+ bzero(key_s, sizeof(key_s));
+
+ /*
+ * get the user's key, unseal it from the server's key, and
+ * use it to seal the cipher
+ */
+
+ /* a_name_data.key_low a_name_data.key_high */
+ bcopy(&a_name_data.key_low, key, 4);
+ bcopy(&a_name_data.key_high, ((long *) key) + 1, 4);
+
+ /* unseal the a_name key from the master key */
+ kdb_encrypt_key(key, key, master_key,
+ master_key_schedule, DECRYPT);
+
+ create_ciph(ciph, session_key, s_name_data.name,
+ s_name_data.instance, local_realm, lifetime,
+ s_name_data.key_version, tk, kerb_time.tv_sec, key);
+
+ /* clear session key */
+ bzero(session_key, sizeof(session_key));
+
+ bzero(key, sizeof(key));
+
+
+
+ /* always send a reply packet */
+ rpkt = create_auth_reply(req_name_ptr, req_inst_ptr,
+ req_realm_ptr, req_time_ws, 0, a_name_data.exp_date,
+ a_name_data.key_version, ciph);
+ sendto(f, rpkt->dat, rpkt->length, 0, client, S_AD_SZ);
+ bzero(&a_name_data, sizeof(a_name_data));
+ bzero(&s_name_data, sizeof(s_name_data));
+ break;
+ }
+ case AUTH_MSG_APPL_REQUEST:
+ {
+ u_long time_ws; /* Workstation time */
+ u_long req_life; /* Requested liftime */
+ char *service; /* Service name */
+ char *instance; /* Service instance */
+ int kerno = 0; /* Kerberos error number */
+ char tktrlm[REALM_SZ];
+
+ n_appl_req++;
+ tk->length = 0;
+ k_flags = 0; /* various kerberos flags */
+
+ auth->length = 4 + strlen(pkt->dat + 3);
+ auth->length += (int) *(pkt->dat + auth->length) +
+ (int) *(pkt->dat + auth->length + 1) + 2;
+
+ bcopy(pkt->dat, auth->dat, auth->length);
+
+ strncpy(tktrlm, auth->dat + 3, REALM_SZ);
+ if (set_tgtkey(tktrlm)) {
+ lt = klog(L_ERR_UNK,
+ "FAILED realm %s unknown. Host: %s ",
+ (int) tktrlm, inet_ntoa(client_host));
+ kerb_err_reply(client, pkt, kerno, lt);
+ return;
+ }
+ kerno = krb_rd_req(auth, "ktbtgt", tktrlm, client_host.s_addr,
+ ad, 0);
+
+ if (kerno) {
+ klog(L_ERR_UNK, "FAILED krb_rd_req from %s: %s",
+ inet_ntoa(client_host), krb_err_txt[kerno]);
+ kerb_err_reply(client, pkt, kerno, "krb_rd_req failed");
+ return;
+ }
+ ptr = (char *) pkt->dat + auth->length;
+
+ bcopy(ptr, &time_ws, 4);
+ ptr += 4;
+
+ req_life = (u_long) (*ptr++);
+
+ service = ptr;
+ instance = ptr + strlen(service) + 1;
+
+ klog(L_APPL_REQ, "APPL Request %s.%s@%s on %s for %s.%s",
+ (int) ad->pname, (int) ad->pinst, (int) ad->prealm,
+ (int) inet_ntoa(client_host), (int) service, (int) instance, 0);
+
+ if (strcmp(ad->prealm, tktrlm)) {
+ kerb_err_reply(client, pkt, KERB_ERR_PRINCIPAL_UNKNOWN,
+ "Can't hop realms");
+ return;
+ }
+ if (!strcmp(service, "changepw")) {
+ kerb_err_reply(client, pkt, KERB_ERR_PRINCIPAL_UNKNOWN,
+ "Can't authorize password changed based on TGT");
+ return;
+ }
+ kerno = check_princ(service, instance, req_life,
+ &s_name_data);
+ if (kerno) {
+ kerb_err_reply(client, pkt, kerno, lt);
+ return;
+ }
+ /* Bound requested lifetime with service and user */
+ lifetime = min(req_life,
+ (ad->life - ((kerb_time.tv_sec - ad->time_sec) / 300)));
+ lifetime = min(lifetime, ((u_long) s_name_data.max_life));
+
+ /* unseal server's key from master key */
+ bcopy(&s_name_data.key_low, key, 4);
+ bcopy(&s_name_data.key_high, ((long *) key) + 1, 4);
+ kdb_encrypt_key(key, key, master_key,
+ master_key_schedule, DECRYPT);
+ /* construct and seal the ticket */
+
+#ifdef NOENCRYPTION
+ bzero(session_key, sizeof(C_Block));
+#else
+ /* random session key */
+ random_key(session_key);
+#endif
+
+ krb_create_ticket(tk, k_flags, ad->pname, ad->pinst,
+ ad->prealm, client_host.s_addr,
+ session_key, lifetime, kerb_time.tv_sec,
+ s_name_data.name, s_name_data.instance,
+ key);
+ bzero(key, sizeof(key));
+ bzero(key_s, sizeof(key_s));
+
+ create_ciph(ciph, session_key, service, instance,
+ local_realm,
+ lifetime, s_name_data.key_version, tk,
+ kerb_time.tv_sec, ad->session);
+
+ /* clear session key */
+ bzero(session_key, sizeof(session_key));
+
+ bzero(ad->session, sizeof(ad->session));
+
+ rpkt = create_auth_reply(ad->pname, ad->pinst,
+ ad->prealm, time_ws,
+ 0, 0, 0, ciph);
+ sendto(f, rpkt->dat, rpkt->length, 0, client, S_AD_SZ);
+ bzero(&s_name_data, sizeof(s_name_data));
+ break;
+ }
+
+
+#ifdef notdef_DIE
+ case AUTH_MSG_DIE:
+ {
+ lt = klog(L_DEATH_REQ,
+ "Host: %s User: \"%s\" \"%s\" Kerberos killed",
+ inet_ntoa(client_host), req_name_ptr, req_inst_ptr, 0);
+ exit(0);
+ }
+#endif notdef_DIE
+
+ default:
+ {
+ lt = klog(L_KRB_PERR,
+ "Unknown message type: %d from %s port %u",
+ (int) req_msg_type, (int) inet_ntoa(client_host),
+ ntohs(client->sin_port));
+ break;
+ }
+ }
+}
+
+
+#ifndef BACKWARD_COMPAT
+/*
+ * setup_disc
+ *
+ * disconnect all descriptors, remove ourself from the process
+ * group that spawned us.
+ */
+
+setup_disc()
+{
+
+ int s;
+
+ for (s = 0; s < 3; s++) {
+ (void) close(s);
+ }
+
+ (void) open("/dev/null", 0);
+ (void) dup2(0, 1);
+ (void) dup2(0, 2);
+
+ s = open("/dev/tty", 2);
+
+ if (s >= 0) {
+ ioctl(s, TIOCNOTTY, (struct sgttyb *) 0);
+ (void) close(s);
+ }
+ (void) chdir("/tmp");
+ return;
+}
+#endif /* BACKWARD_COMPAT */
+
+
+/*
+ * kerb_er_reply creates an error reply packet and sends it to the
+ * client.
+ */
+
+void
+kerb_err_reply(client, pkt, err, string)
+ struct sockaddr_in *client;
+ KTEXT pkt;
+ long err;
+ char *string;
+
+{
+ static KTEXT_ST e_pkt_st;
+ KTEXT e_pkt = &e_pkt_st;
+ static char e_msg[128];
+
+ strcpy(e_msg, "\nKerberos error -- ");
+ strcat(e_msg, string);
+ cr_err_reply(e_pkt, req_name_ptr, req_inst_ptr, req_realm_ptr,
+ req_time_ws, err, e_msg);
+ sendto(f, e_pkt->dat, e_pkt->length, 0, client, S_AD_SZ);
+
+}
+
+#ifndef BACKWARD_COMPAT
+/*
+ * Make sure that database isn't stale.
+ *
+ * Exit if it is; we don't want to tell lies.
+ */
+
+static void check_db_age()
+{
+ long age;
+
+ if (max_age != -1) {
+ /* Requires existance of kerb_get_db_age() */
+ gettimeofday(&kerb_time, 0);
+ age = kerb_get_db_age();
+ if (age == 0) {
+ klog(L_KRB_PERR, "Database currently being updated!");
+ hang();
+ }
+ if ((age + max_age) < kerb_time.tv_sec) {
+ klog(L_KRB_PERR, "Database out of date!");
+ hang();
+ /* NOTREACHED */
+ }
+ }
+}
+#endif /* BACKWARD_COMPAT */
+
+check_princ(p_name, instance, lifetime, p)
+ char *p_name;
+ char *instance;
+ unsigned lifetime;
+
+ Principal *p;
+{
+ static int n;
+ static int more;
+ /* long trans; */
+
+ n = kerb_get_principal(p_name, instance, p, 1, &more);
+ klog(L_ALL_REQ,
+ "Principal: \"%s\", Instance: \"%s\" Lifetime = %d n = %d",
+ (int) p_name, (int) instance, lifetime, n, 0);
+
+ if (n < 0) {
+ lt = klog(L_KRB_PERR, "Database unavailable!");
+ hang();
+ }
+
+ /*
+ * if more than one p_name, pick one, randomly create a session key,
+ * compute maximum lifetime, lookup authorizations if applicable,
+ * and stuff into cipher.
+ */
+ if (n == 0) {
+ /* service unknown, log error, skip to next request */
+ lt = klog(L_ERR_UNK, "UNKNOWN \"%s\" \"%s\"", (int) p_name,
+ (int) instance, 0);
+ return KERB_ERR_PRINCIPAL_UNKNOWN;
+ }
+ if (more) {
+ /* not unique, log error */
+ lt = klog(L_ERR_NUN, "Principal NOT UNIQUE \"%s\" \"%s\"",
+ (int) p_name, (int) instance, 0);
+ return KERB_ERR_PRINCIPAL_NOT_UNIQUE;
+ }
+ /* If the user's key is null, we want to return an error */
+ if ((p->key_low == 0) && (p->key_high == 0)) {
+ /* User has a null key */
+ lt = klog(L_ERR_NKY, "Null key \"%s\" \"%s\"", (int) p_name,
+ (int) instance, 0);
+ return KERB_ERR_NULL_KEY;
+ }
+ if (master_key_version != p->kdc_key_ver) {
+ /* log error reply */
+ lt = klog(L_ERR_MKV,
+ "Key vers incorrect, KRB = %d, \"%s\" \"%s\" = %d",
+ master_key_version, (int)p->name, (int)p->instance, p->kdc_key_ver,
+ 0);
+ return KERB_ERR_NAME_MAST_KEY_VER;
+ }
+ /* make sure the service hasn't expired */
+ if ((u_long) p->exp_date < (u_long) kerb_time.tv_sec) {
+ /* service did expire, log it */
+ lt = klog(L_ERR_SEXP,
+ "EXPIRED \"%s\" \"%s\" %s", (int) p->name, (int) p->instance,
+ (int) stime(&(p->exp_date)), 0);
+ return KERB_ERR_NAME_EXP;
+ }
+ /* ok is zero */
+ return 0;
+}
+
+
+/* Set the key for krb_rd_req so we can check tgt */
+set_tgtkey(r)
+ char *r; /* Realm for desired key */
+{
+ int n;
+ static char lastrealm[REALM_SZ];
+ Principal p_st;
+ Principal *p = &p_st;
+ C_Block key;
+
+ if (!strcmp(lastrealm, r))
+ return (KSUCCESS);
+
+ log("Getting key for %s", r);
+
+ n = kerb_get_principal("krbtgt", r, p, 1, &more);
+ if (n == 0)
+ return (KFAILURE);
+
+ /* unseal tgt key from master key */
+ bcopy(&p->key_low, key, 4);
+ bcopy(&p->key_high, ((long *) key) + 1, 4);
+ kdb_encrypt_key(key, key, master_key,
+ master_key_schedule, DECRYPT);
+ krb_set_key(key, 0);
+ strcpy(lastrealm, r);
+ return (KSUCCESS);
+}
+
+#ifndef BACKWARD_COMPAT
+static void
+hang()
+{
+ if (pause_int == -1) {
+ klog(L_KRB_PERR, "Kerberos will pause so as not to loop init");
+ for (;;)
+ pause();
+ } else {
+ char buf[256];
+ sprintf(buf, "Kerberos will wait %d seconds before dying so as not to loop init", pause_int);
+ klog(L_KRB_PERR, buf);
+ sleep(pause_int);
+ klog(L_KRB_PERR, "Do svedania....\n");
+ exit(1);
+ }
+}
+#endif /* BACKWARD_COMPAT */
projects / krb5.git / commitdiff