src/aklog/klog.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 #include <afsconfig.h>
  11 #include <afs/param.h>
  12 #include <afs/stds.h>
  13
  14 #include <roken.h>
  15
  16 #include <rx/xdr.h>
  17 #include <lock.h>
  18 #include <ubik.h>
  19 #include <afs/com_err.h>
  20 #include <afs/auth.h>
  21 #include <afs/afsutil.h>
  22 #include <afs/cellconfig.h>
  23 #include <afs/ptclient.h>
  24 #include <afs/cmd.h>
  25 #include <afs/ptuser.h>
  26
  27 #define KERBEROS_APPLE_DEPRECATED(x)
  28 #include <krb5.h>
  29
  30 #ifdef HAVE_KRB5_CREDS_KEYBLOCK
  31 #define USING_MIT 1
  32 #endif
  33 #ifdef HAVE_KRB5_CREDS_SESSION
  34 #define USING_HEIMDAL 1
  35 #endif
  36
  37 #include "skipwrap.h"
  38
  39 /* This code borrowed heavily from the previous version of log.  Here is the
  40    intro comment for that program: */
  41
  42 /*
  43         log -- tell the Andrew Cache Manager your password
  44         5 June 1985
  45         modified
  46         February 1986
  47
  48         Further modified in August 1987 to understand cell IDs.
  49
  50         Further modified in October 2006 to understand kerberos 5.
  51  */
  52
  53 /* Current Usage:
  54      klog [principal [password]] [-t] [-c cellname] [-k <k5realm>]
  55
  56      where:
  57        principal is of the form 'name' or 'name@cell' which provides the
  58           cellname.  See the -c option below.
  59        password is the user's password.  This form is NOT recommended for
  60           interactive users.
  61        -t advises klog to write a Kerberos style ticket file in /tmp.
  62        -c identifies cellname as the cell in which authentication is to take
  63           place.
  64        -k identifies an alternate kerberos realm to use provide
  65           authentication services for the cell.
  66  */
  67
  68 #define KLOGEXIT(code) rx_Finalize(); \
  69                        (exit(!!code))
  70 static int CommandProc(struct cmd_syndesc *as, void *arock);
  71
  72 static int zero_argc;
  73 static char **zero_argv;
  74
  75 static krb5_context k5context;
  76 static struct afsconf_dir *tdir;
  77 static int always_evil = 2;     /* gcc optimizes 0 into bss.  fools. */
  78
  79 int
  80 main(int argc, char *argv[])
  81 {
  82     struct cmd_syndesc *ts;
  83     afs_int32 code;
  84 #ifdef  AFS_AIX32_ENV
  85     /*
  86      * The following signal action for AIX is necessary so that in case of a
  87      * crash (i.e. core is generated) we can include the user's data section
  88      * in the core dump. Unfortunately, by default, only a partial core is
  89      * generated which, in many cases, isn't too useful.
  90      */
  91     struct sigaction nsa;
  92
  93     sigemptyset(&nsa.sa_mask);
  94     nsa.sa_handler = SIG_DFL;
  95     nsa.sa_flags = SA_FULLDUMP;
  96     sigaction(SIGABRT, &nsa, NULL);
  97     sigaction(SIGSEGV, &nsa, NULL);
  98 #endif
  99     zero_argc = argc;
 100     zero_argv = argv;
 101
 102     ts = cmd_CreateSyntax(NULL, CommandProc, NULL, 0,
 103                           "obtain Kerberos authentication");
 104
 105 #define aXFLAG 0
 106 #define aPRINCIPAL 1
 107 #define aPASSWORD 2
 108 #define aCELL 3
 109 #define aKRBREALM 4
 110 #define aPIPE 5
 111 #define aSILENT 6
 112 #define aLIFETIME 7
 113 #define aSETPAG 8
 114 #define aTMP 9
 115 #define aNOPRDB 10
 116 #define aUNWRAP 11
 117 #define aK5 12
 118 #define aK4 13
 119
 120     cmd_AddParm(ts, "-x", CMD_FLAG, CMD_OPTIONAL, "obsolete, noop");
 121     cmd_Seek(ts, aPRINCIPAL);
 122     cmd_AddParm(ts, "-principal", CMD_SINGLE, CMD_OPTIONAL, "user name");
 123     cmd_AddParm(ts, "-password", CMD_SINGLE, CMD_OPTIONAL, "user's password");
 124     cmd_AddParm(ts, "-cell", CMD_SINGLE, CMD_OPTIONAL, "cell name");
 125     cmd_AddParm(ts, "-k", CMD_SINGLE, CMD_OPTIONAL, "krb5 realm");
 126     cmd_AddParm(ts, "-pipe", CMD_FLAG, CMD_OPTIONAL,
 127                 "read password from stdin");
 128     cmd_AddParm(ts, "-silent", CMD_FLAG, CMD_OPTIONAL, "silent operation");
 129     cmd_AddParm(ts, "-lifetime", CMD_SINGLE, CMD_OPTIONAL,
 130                 "ticket lifetime in hh[:mm[:ss]]");
 131     cmd_AddParm(ts, "-setpag", CMD_FLAG, CMD_OPTIONAL,
 132                 "Create a new setpag before authenticating");
 133     cmd_AddParm(ts, "-tmp", CMD_FLAG, CMD_OPTIONAL,
 134                 "write Kerberos-style ticket file in /tmp");
 135     cmd_AddParm(ts, "-noprdb", CMD_FLAG, CMD_OPTIONAL, "don't consult pt");
 136     cmd_AddParm(ts, "-unwrap", CMD_FLAG, CMD_OPTIONAL, "perform 524d conversion");
 137 #ifdef AFS_RXK5
 138     cmd_AddParm(ts, "-k5", CMD_FLAG, CMD_OPTIONAL, "get rxk5 credentials");
 139     cmd_AddParm(ts, "-k4", CMD_FLAG, CMD_OPTIONAL, "get rxkad credentials");
 140 #else
 141     ++ts->nParms;       /* skip -k5 */
 142     cmd_AddParm(ts, "-k4", CMD_FLAG, CMD_OPTIONAL|CMD_HIDDEN, 0);
 143 #endif
 144
 145     code = cmd_Dispatch(argc, argv);
 146     KLOGEXIT(code);
 147 }
 148
 149 static char *
 150 getpipepass(void)
 151 {
 152     static char gpbuf[BUFSIZ];
 153     /* read a password from stdin, stop on \n or eof */
 154     int i, tc;
 155     memset(gpbuf, 0, sizeof(gpbuf));
 156     for (i = 0; i < (sizeof(gpbuf) - 1); i++) {
 157         tc = fgetc(stdin);
 158         if (tc == '\n' || tc == EOF)
 159             break;
 160         gpbuf[i] = tc;
 161     }
 162     return gpbuf;
 163 }
 164
 165 void
 166 silent_errors(const char *who,
 167     afs_int32 code,
 168     const char *fmt,
 169     va_list ap)
 170 {
 171     /* ignore and don't print error */
 172 }
 173
 174 #if defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
 175
 176 #define get_princ_str(c, p, n) krb5_princ_component(c, p, n)->data
 177 #define get_princ_len(c, p, n) krb5_princ_component(c, p, n)->length
 178 #define num_comp(c, p) (krb5_princ_size(c, p))
 179 #define realm_data(c, p) krb5_princ_realm(c, p)->data
 180 #define realm_len(c, p) krb5_princ_realm(c, p)->length
 181
 182 #elif defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING)
 183
 184 #define get_princ_str(c, p, n) krb5_principal_get_comp_string(c, p, n)
 185 #define get_princ_len(c, p, n) strlen(krb5_principal_get_comp_string(c, p, n))
 186 #define num_comp(c, p) ((p)->name.name_string.len)
 187 #define realm_data(c, p) krb5_realm_data(krb5_principal_get_realm(c, p))
 188 #define realm_len(c, p) krb5_realm_length(krb5_principal_get_realm(c, p))
 189
 190 #else
 191 #error "Must have either krb5_princ_size or krb5_principal_get_comp_string"
 192 #endif
 193
 194 #if defined(HAVE_KRB5_CREDS_KEYBLOCK)
 195
 196 #define get_cred_keydata(c) c->keyblock.contents
 197 #define get_cred_keylen(c) c->keyblock.length
 198 #define get_creds_enctype(c) c->keyblock.enctype
 199
 200 #elif defined(HAVE_KRB5_CREDS_SESSION)
 201
 202 #define get_cred_keydata(c) c->session.keyvalue.data
 203 #define get_cred_keylen(c) c->session.keyvalue.length
 204 #define get_creds_enctype(c) c->session.keytype
 205
 206 #else
 207 #error "Must have either keyblock or session member of krb5_creds"
 208 #endif
 209
 210 static int
 211 whoami(struct ktc_token *atoken,
 212     struct afsconf_cell *cellconfig,
 213     struct ktc_principal *aclient,
 214     int *vicep)
 215 {
 216     int code;
 217     char tempname[2*PR_MAXNAMELEN];
 218
 219     code = pr_Initialize(0, AFSDIR_CLIENT_ETC_DIRPATH, cellconfig->name);
 220     if (code)
 221         goto Failed;
 222
 223     if (*aclient->instance)
 224         snprintf (tempname, sizeof tempname, "%s.%s",
 225             aclient->name, aclient->instance);
 226     else
 227         snprintf (tempname, sizeof tempname, "%s", aclient->name);
 228     code = pr_SNameToId(tempname, vicep);
 229 Failed:
 230     return code;
 231 }
 232
 233 static void
 234 k5_to_k4_name(krb5_context k5context,
 235     krb5_principal k5princ,
 236     struct ktc_principal *ktcprinc)
 237 {
 238     int i;
 239
 240     switch(num_comp(k5context, k5princ)) {
 241         default:
 242         /* case 2: */
 243             i = get_princ_len(k5context, k5princ, 1);
 244             if (i > MAXKTCNAMELEN-1) i = MAXKTCNAMELEN-1;
 245             memcpy(ktcprinc->instance, get_princ_str(k5context, k5princ, 1), i);
 246             /* fall through */
 247         case 1:
 248             i = get_princ_len(k5context, k5princ, 0);
 249             if (i > MAXKTCNAMELEN-1) i = MAXKTCNAMELEN-1;
 250             memcpy(ktcprinc->name, get_princ_str(k5context, k5princ, 0), i);
 251             /* fall through */
 252         case 0:
 253             break;
 254         }
 255 }
 256
 257 #if defined(USING_HEIMDAL) || defined(HAVE_KRB5_PROMPT_TYPE)
 258 static int
 259 klog_is_pass_prompt(int index, krb5_context context, krb5_prompt prompts[])
 260 {
 261     switch (prompts[index].type) {
 262     case KRB5_PROMPT_TYPE_PASSWORD:
 263     case KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN:
 264         return 1;
 265     default:
 266         return 0;
 267     }
 268 }
 269 #elif defined(HAVE_KRB5_GET_PROMPT_TYPES)
 270 static int
 271 klog_is_pass_prompt(int index, krb5_context context, krb5_prompt prompts[])
 272 {
 273     /* this isn't thread-safe or anything obviously; it just should be good
 274      * enough to work with klog */
 275     static krb5_prompt_type *types = NULL;
 276     if (index == 0) {
 277         types = NULL;
 278     }
 279     if (!types) {
 280         types = krb5_get_prompt_types(context);
 281     }
 282     if (!types) {
 283         return 0;
 284     }
 285     switch (types[index]) {
 286     case KRB5_PROMPT_TYPE_PASSWORD:
 287     case KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN:
 288         return 1;
 289     default:
 290         return 0;
 291     }
 292 }
 293 #else
 294 static int
 295 klog_is_pass_prompt(int index, krb5_context context, krb5_prompt prompts[])
 296 {
 297     /* AIX 5.3 doesn't have krb5_get_prompt_types. Neither does HP-UX, which
 298      * also doesn't even define KRB5_PROMPT_TYPE_PASSWORD &co. We have no way
 299      * of determining the the prompt type, so just assume it's a password */
 300     return 1;
 301 }
 302 #endif
 303
 304 /* save and reuse password.  This is necessary to make
 305  *  "direct to service" authentication work with most
 306  *  flavors of kerberos, when the afs principal has no instance.
 307  */
 308 struct kp_arg {
 309     char **pp, *pstore;
 310     size_t allocated;
 311 };
 312 krb5_error_code
 313 klog_prompter(krb5_context context,
 314     void *a,
 315     const char *name,
 316     const char *banner,
 317     int num_prompts,
 318     krb5_prompt prompts[])
 319 {
 320     krb5_error_code code;
 321     int i;
 322     struct kp_arg *kparg = (struct kp_arg *) a;
 323     size_t length;
 324
 325     code = krb5_prompter_posix(context, a, name, banner, num_prompts, prompts);
 326     if (code) return code;
 327     for (i = 0; i < num_prompts; ++i) {
 328         if (klog_is_pass_prompt(i, context, prompts)) {
 329             length = prompts[i].reply->length;
 330             if (length > kparg->allocated - 1)
 331                 length = kparg->allocated - 1;
 332             memcpy(kparg->pstore, prompts[i].reply->data, length);
 333             kparg->pstore[length] = 0;
 334             *kparg->pp = kparg->pstore;
 335         }
 336     }
 337     return 0;
 338 }
 339
 340 static int
 341 CommandProc(struct cmd_syndesc *as, void *arock)
 342 {
 343     krb5_principal princ = 0;
 344     char *cell, *pname, **hrealms, *service;
 345     char service_temp[MAXKTCREALMLEN + 20];
 346     krb5_creds incred[1], mcred[1], *outcred = 0, *afscred;
 347     krb5_ccache cc = 0;
 348 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
 349     krb5_get_init_creds_opt *gic_opts;
 350 #else
 351     krb5_get_init_creds_opt gic_opts[1];
 352 #endif
 353     char *tofree = NULL, *outname;
 354     int code;
 355     char *what;
 356     int i, dosetpag, evil, noprdb, id;
 357 #ifdef AFS_RXK5
 358     int authtype;
 359 #endif
 360     krb5_data enc_part[1];
 361     time_t lifetime;            /* requested ticket lifetime */
 362     krb5_prompter_fct pf = NULL;
 363     char *pass = 0;
 364     void *pa = 0;
 365     struct kp_arg klog_arg[1];
 366
 367     char passwd[BUFSIZ];
 368     struct afsconf_cell cellconfig[1];
 369
 370     static char rn[] = "klog";  /*Routine name */
 371     static int Pipe = 0;        /* reading from a pipe */
 372     static int Silent = 0;      /* Don't want error messages */
 373
 374     int writeTicketFile = 0;    /* write ticket file to /tmp */
 375
 376     service = 0;
 377     memset(incred, 0, sizeof *incred);
 378     /* blow away command line arguments */
 379     for (i = 1; i < zero_argc; i++)
 380         memset(zero_argv[i], 0, strlen(zero_argv[i]));
 381     zero_argc = 0;
 382     memset(klog_arg, 0, sizeof *klog_arg);
 383
 384     /* first determine quiet flag based on -silent switch */
 385     Silent = (as->parms[aSILENT].items ? 1 : 0);
 386
 387     if (Silent) {
 388         afs_set_com_err_hook(silent_errors);
 389     }
 390
 391     if ((code = krb5_init_context(&k5context))) {
 392         afs_com_err(rn, code, "while initializing Kerberos 5 library");
 393         KLOGEXIT(code);
 394     }
 395     if ((code = rx_Init(0))) {
 396         afs_com_err(rn, code, "while initializing rx");
 397         KLOGEXIT(code);
 398     }
 399     initialize_U_error_table();
 400     /*initialize_krb5_error_table();*/
 401     initialize_RXK_error_table();
 402     initialize_KTC_error_table();
 403     initialize_ACFG_error_table();
 404     /* initialize_rx_error_table(); */
 405     if (!(tdir = afsconf_Open(AFSDIR_CLIENT_ETC_DIRPATH))) {
 406         afs_com_err(rn, 0, "can't get afs configuration (afsconf_Open(%s))",
 407             AFSDIR_CLIENT_ETC_DIRPATH);
 408         KLOGEXIT(1);
 409     }
 410
 411     /*
 412      * Enable DES enctypes, which are currently still required for AFS.
 413      * krb5_allow_weak_crypto is MIT Kerberos 1.8.  krb5_enctype_enable is
 414      * Heimdal.
 415      */
 416 #if defined(HAVE_KRB5_ENCTYPE_ENABLE)
 417     i = krb5_enctype_valid(k5context, ETYPE_DES_CBC_CRC);
 418     if (i)
 419         krb5_enctype_enable(k5context, ETYPE_DES_CBC_CRC);
 420 #elif defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO)
 421     krb5_allow_weak_crypto(k5context, 1);
 422 #endif
 423
 424     /* Parse remaining arguments. */
 425
 426     dosetpag = !! as->parms[aSETPAG].items;
 427     Pipe = !! as->parms[aPIPE].items;
 428     writeTicketFile = !! as->parms[aTMP].items;
 429     noprdb = !! as->parms[aNOPRDB].items;
 430     evil = (always_evil&1) || !! as->parms[aUNWRAP].items;
 431
 432 #ifdef AFS_RXK5
 433     authtype = 0;
 434     if (as->parms[aK5].items)
 435         authtype |= FORCE_RXK5;
 436     if (as->parms[aK4].items)
 437         authtype |= FORCE_RXKAD;
 438     if (!authtype)
 439         authtype |= env_afs_rxk5_default();
 440 #endif
 441
 442     cell = as->parms[aCELL].items ? as->parms[aCELL].items->data : 0;
 443     if ((code = afsconf_GetCellInfo(tdir, cell, "afsprot", cellconfig))) {
 444         if (cell)
 445             afs_com_err(rn, code, "Can't get cell information for '%s'", cell);
 446         else
 447             afs_com_err(rn, code, "Can't get determine local cell!");
 448         KLOGEXIT(code);
 449     }
 450
 451     if (as->parms[aKRBREALM].items) {
 452         code = krb5_set_default_realm(k5context,
 453                 as->parms[aKRBREALM].items->data);
 454         if (code) {
 455             afs_com_err(rn, code, "Can't make <%s> the default realm",
 456                 as->parms[aKRBREALM].items->data);
 457             KLOGEXIT(code);
 458         }
 459     }
 460     else if ((code = krb5_get_host_realm(k5context, cellconfig->hostName[0], &hrealms))) {
 461         afs_com_err(rn, code, "Can't get realm for host <%s> in cell <%s>\n",
 462                 cellconfig->hostName[0], cellconfig->name);
 463         KLOGEXIT(code);
 464     } else {
 465         if (hrealms && *hrealms) {
 466             code = krb5_set_default_realm(k5context,
 467                     *hrealms);
 468             if (code) {
 469                 afs_com_err(rn, code, "Can't make <%s> the default realm",
 470                     *hrealms);
 471                 KLOGEXIT(code);
 472             }
 473         }
 474         if (hrealms) krb5_free_host_realm(k5context, hrealms);
 475     }
 476
 477     id = getuid();
 478     if (as->parms[aPRINCIPAL].items) {
 479         pname = as->parms[aPRINCIPAL].items->data;
 480     } else {
 481         /* No explicit name provided: use Unix uid. */
 482         struct passwd *pw;
 483         pw = getpwuid(id);
 484         if (pw == 0) {
 485             afs_com_err(rn, 0,
 486                 "Can't figure out your name from your user id (%d).", id);
 487             if (!Silent)
 488                 fprintf(stderr, "%s: Try providing the user name.\n", rn);
 489             KLOGEXIT(1);
 490         }
 491         pname = pw->pw_name;
 492     }
 493     code = krb5_parse_name(k5context, pname, &princ);
 494     if (code) {
 495         afs_com_err(rn, code, "Can't parse principal <%s>", pname);
 496         KLOGEXIT(code);
 497     }
 498
 499     if (as->parms[aPASSWORD].items) {
 500         /*
 501          * Current argument is the desired password string.  Remember it in
 502          * our local buffer, and zero out the argument string - anyone can
 503          * see it there with ps!
 504          */
 505         strncpy(passwd, as->parms[aPASSWORD].items->data, sizeof(passwd));
 506         memset(as->parms[aPASSWORD].items->data, 0,
 507                strlen(as->parms[aPASSWORD].items->data));
 508         pass = passwd;
 509     }
 510
 511     if (as->parms[aLIFETIME].items) {
 512         char *life = as->parms[aLIFETIME].items->data;
 513         char *sp;               /* string ptr to rest of life */
 514         lifetime = 3600 * strtol(life, &sp, 0); /* hours */
 515         if (sp == life) {
 516           bad_lifetime:
 517             if (!Silent)
 518                 fprintf(stderr, "%s: translating '%s' to lifetime failed\n",
 519                         rn, life);
 520             return 1;
 521         }
 522         if (*sp == ':') {
 523             life = sp + 1;      /* skip the colon */
 524             lifetime += 60 * strtol(life, &sp, 0);      /* minutes */
 525             if (sp == life)
 526                 goto bad_lifetime;
 527             if (*sp == ':') {
 528                 life = sp + 1;
 529                 lifetime += strtol(life, &sp, 0);       /* seconds */
 530                 if (sp == life)
 531                     goto bad_lifetime;
 532                 if (*sp)
 533                     goto bad_lifetime;
 534             } else if (*sp)
 535                 goto bad_lifetime;
 536         } else if (*sp)
 537             goto bad_lifetime;
 538     } else
 539         lifetime = 0;
 540
 541     /* Get the password if it wasn't provided. */
 542     if (!pass) {
 543         if (Pipe) {
 544             strncpy(passwd, getpipepass(), sizeof(passwd));
 545             pass = passwd;
 546         } else {
 547             pf = klog_prompter;
 548             pa = klog_arg;
 549         }
 550     }
 551
 552     service = 0;
 553 #ifdef AFS_RXK5
 554     if (authtype & FORCE_RXK5) {
 555         tofree = get_afs_krb5_svc_princ(cellconfig);
 556         snprintf(service_temp, sizeof service_temp, "%s", tofree);
 557     } else
 558 #endif
 559     snprintf (service_temp, sizeof service_temp, "afs/%s", cellconfig->name);
 560
 561     klog_arg->pp = &pass;
 562     klog_arg->pstore = passwd;
 563     klog_arg->allocated = sizeof(passwd);
 564     /* XXX should allow k5 to prompt in most cases -- what about expired pw?*/
 565 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
 566     code = krb5_get_init_creds_opt_alloc(k5context, &gic_opts);
 567     if (code) {
 568         afs_com_err(rn, code, "Can't allocate get_init_creds options");
 569         KLOGEXIT(code);
 570     }
 571 #else
 572     krb5_get_init_creds_opt_init(gic_opts);
 573 #endif
 574
 575     for (;;) {
 576         code = krb5_get_init_creds_password(k5context,
 577             incred,
 578             princ,
 579             pass,
 580             pf, /* prompter */
 581             pa, /* data */
 582             0,  /* start_time */
 583             0,  /* in_tkt_service */
 584             gic_opts);
 585         if (code != KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN)
 586             break;
 587     }
 588     memset(passwd, 0, sizeof(passwd));
 589     if (code) {
 590         char *r = 0;
 591         if (krb5_get_default_realm(k5context, &r))
 592             r = 0;
 593         if (r)
 594             afs_com_err(rn, code, "Unable to authenticate in realm %s", r);
 595         else
 596             afs_com_err(rn, code, "Unable to authenticate to use cell %s",
 597                 cellconfig->name);
 598         if (r) free(r);
 599         KLOGEXIT(code);
 600     }
 601
 602     for (;;writeTicketFile = 0) {
 603         if (writeTicketFile) {
 604             what = "getting default ccache";
 605             code = krb5_cc_default(k5context, &cc);
 606         } else {
 607             what = "krb5_cc_resolve";
 608             code = krb5_cc_resolve(k5context, "MEMORY:core", &cc);
 609             if (code) goto Failed;
 610         }
 611         what = "initializing ccache";
 612         code = krb5_cc_initialize(k5context, cc, princ);
 613         if (code) goto Failed;
 614         what = "writing Kerberos ticket file";
 615         code = krb5_cc_store_cred(k5context, cc, incred);
 616         if (code) goto Failed;
 617         if (writeTicketFile)
 618             fprintf(stderr,
 619                     "Wrote ticket file to %s\n",
 620                     krb5_cc_get_name(k5context, cc));
 621         break;
 622       Failed:
 623         if (code)
 624             afs_com_err(rn, code, "%s", what);
 625         if (writeTicketFile) {
 626             if (cc) {
 627                 krb5_cc_close(k5context, cc);
 628                 cc = 0;
 629             }
 630             continue;
 631         }
 632         KLOGEXIT(code);
 633     }
 634
 635     for (service = service_temp;;service = "afs") {
 636         memset(mcred, 0, sizeof *mcred);
 637         mcred->client = princ;
 638         code = krb5_parse_name(k5context, service, &mcred->server);
 639         if (code) {
 640             afs_com_err(rn, code, "Unable to parse service <%s>\n", service);
 641             KLOGEXIT(code);
 642         }
 643         if (tofree) { free(tofree); tofree = 0; }
 644         if (!(code = krb5_unparse_name(k5context, mcred->server, &outname)))
 645             tofree = outname;
 646         else outname = service;
 647         code = krb5_get_credentials(k5context, 0, cc, mcred, &outcred);
 648         krb5_free_principal(k5context, mcred->server);
 649         if (code != KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN || service != service_temp) break;
 650 #ifdef AFS_RXK5
 651         if (authtype & FORCE_RXK5)
 652             break;
 653 #endif
 654     }
 655     afscred = outcred;
 656
 657     if (code) {
 658         afs_com_err(rn, code, "Unable to get credentials to use %s", outname);
 659         KLOGEXIT(code);
 660     }
 661
 662 #ifdef AFS_RXK5
 663     if (authtype & FORCE_RXK5) {
 664         struct ktc_principal aserver[1];
 665         int viceid = 555;
 666
 667         memset(aserver, 0, sizeof *aserver);
 668         strncpy(aserver->cell, cellconfig->name, MAXKTCREALMLEN-1);
 669         code = ktc_SetK5Token(k5context, aserver, afscred, viceid, dosetpag);
 670         if (code) {
 671             afs_com_err(rn, code, "Unable to store tokens for cell %s\n",
 672                 cellconfig->name);
 673             KLOGEXIT(1);
 674         }
 675     } else
 676 #endif
 677     {
 678         struct ktc_principal aserver[1], aclient[1];
 679         struct ktc_token atoken[1];
 680
 681         memset(atoken, 0, sizeof *atoken);
 682         if (evil) {
 683             size_t elen = enc_part->length;
 684             atoken->kvno = RXKAD_TKT_TYPE_KERBEROS_V5_ENCPART_ONLY;
 685             if (afs_krb5_skip_ticket_wrapper(afscred->ticket.data,
 686                         afscred->ticket.length, (char **) &enc_part->data,
 687                         &elen)) {
 688                 afs_com_err(rn, 0, "Can't unwrap %s AFS credential",
 689                     cellconfig->name);
 690                 KLOGEXIT(1);
 691             }
 692         } else {
 693             atoken->kvno = RXKAD_TKT_TYPE_KERBEROS_V5;
 694             *enc_part = afscred->ticket;
 695         }
 696         atoken->startTime = afscred->times.starttime;
 697         atoken->endTime = afscred->times.endtime;
 698         if (tkt_DeriveDesKey(get_creds_enctype(afscred),
 699                              get_cred_keydata(afscred),
 700                              get_cred_keylen(afscred), &atoken->sessionKey)) {
 701             afs_com_err(rn, 0,
 702                         "Cannot derive DES key from enctype %i of length %u",
 703                         get_creds_enctype(afscred),
 704                         (unsigned)get_cred_keylen(afscred));
 705             KLOGEXIT(1);
 706         }
 707         memcpy(atoken->ticket, enc_part->data,
 708             atoken->ticketLen = enc_part->length);
 709         memset(aserver, 0, sizeof *aserver);
 710         strncpy(aserver->name, "afs", 4);
 711         strncpy(aserver->cell, cellconfig->name, MAXKTCREALMLEN-1);
 712         memset(aclient, 0, sizeof *aclient);
 713         i = realm_len(k5context, afscred->client);
 714         if (i > MAXKTCREALMLEN-1) i = MAXKTCREALMLEN-1;
 715         memcpy(aclient->cell, realm_data(k5context, afscred->client), i);
 716         if (!noprdb) {
 717             int viceid = 0;
 718             k5_to_k4_name(k5context, afscred->client, aclient);
 719             code = whoami(atoken, cellconfig, aclient, &viceid);
 720             if (code) {
 721                 afs_com_err(rn, code, "Can't get your viceid for cell %s", cellconfig->name);
 722                 *aclient->name = 0;
 723             } else
 724                 snprintf(aclient->name, MAXKTCNAMELEN-1, "AFS ID %d", viceid);
 725         }
 726         if (!*aclient->name)
 727             k5_to_k4_name(k5context, afscred->client, aclient);
 728         code = ktc_SetToken(aserver, atoken, aclient, dosetpag);
 729         if (code) {
 730             afs_com_err(rn, code, "Unable to store tokens for cell %s\n",
 731                 cellconfig->name);
 732             KLOGEXIT(1);
 733         }
 734     }
 735
 736     krb5_free_principal(k5context, princ);
 737     krb5_free_cred_contents(k5context, incred);
 738     if (outcred) krb5_free_creds(k5context, outcred);
 739     if (cc)
 740         krb5_cc_close(k5context, cc);
 741     if (tofree) free(tofree);
 742
 743     return 0;
 744 }