source4/heimdal/lib/gssapi/mech/gss_krb5.c

   1 /*-
   2  * Copyright (c) 2005 Doug Rabson
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      $FreeBSD: src/lib/libgssapi/gss_krb5.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
  27  */
  28
  29 #include "mech_locl.h"
  30 RCSID("$Id: gss_krb5.c 21889 2007-08-09 07:43:24Z lha $");
  31
  32 #include <krb5.h>
  33 #include <roken.h>
  34
  35
  36 OM_uint32
  37 gss_krb5_copy_ccache(OM_uint32 *minor_status,
  38                      gss_cred_id_t cred,
  39                      krb5_ccache out)
  40 {
  41     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
  42     krb5_context context;
  43     krb5_error_code kret;
  44     krb5_ccache id;
  45     OM_uint32 ret;
  46     char *str;
  47
  48     ret = gss_inquire_cred_by_oid(minor_status,
  49                                   cred,
  50                                   GSS_KRB5_COPY_CCACHE_X,
  51                                   &data_set);
  52     if (ret)
  53         return ret;
  54
  55     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
  56         gss_release_buffer_set(minor_status, &data_set);
  57         *minor_status = EINVAL;
  58         return GSS_S_FAILURE;
  59     }
  60
  61     kret = krb5_init_context(&context);
  62     if (kret) {
  63         *minor_status = kret;
  64         gss_release_buffer_set(minor_status, &data_set);
  65         return GSS_S_FAILURE;
  66     }
  67
  68     kret = asprintf(&str, "%.*s", (int)data_set->elements[0].length,
  69                     (char *)data_set->elements[0].value);
  70     gss_release_buffer_set(minor_status, &data_set);
  71     if (kret == -1) {
  72         *minor_status = ENOMEM;
  73         return GSS_S_FAILURE;
  74     }
  75
  76     kret = krb5_cc_resolve(context, str, &id);
  77     free(str);
  78     if (kret) {
  79         *minor_status = kret;
  80         return GSS_S_FAILURE;
  81     }
  82
  83     kret = krb5_cc_copy_cache(context, id, out);
  84     krb5_cc_close(context, id);
  85     krb5_free_context(context);
  86     if (kret) {
  87         *minor_status = kret;
  88         return GSS_S_FAILURE;
  89     }
  90
  91     return ret;
  92 }
  93
  94 OM_uint32
  95 gss_krb5_import_cred(OM_uint32 *minor_status,
  96                      krb5_ccache id,
  97                      krb5_principal keytab_principal,
  98                      krb5_keytab keytab,
  99                      gss_cred_id_t *cred)
 100 {
 101     gss_buffer_desc buffer;
 102     OM_uint32 major_status;
 103     krb5_context context;
 104     krb5_error_code ret;
 105     krb5_storage *sp;
 106     krb5_data data;
 107     char *str;
 108
 109     *cred = GSS_C_NO_CREDENTIAL;
 110
 111     ret = krb5_init_context(&context);
 112     if (ret) {
 113         *minor_status = ret;
 114         return GSS_S_FAILURE;
 115     }
 116
 117     sp = krb5_storage_emem();
 118     if (sp == NULL) {
 119         *minor_status = ENOMEM;
 120         major_status = GSS_S_FAILURE;
 121         goto out;
 122     }
 123
 124     if (id) {
 125         ret = krb5_cc_get_full_name(context, id, &str);
 126         if (ret == 0) {
 127             ret = krb5_store_string(sp, str);
 128             free(str);
 129         }
 130     } else
 131         ret = krb5_store_string(sp, "");
 132     if (ret) {
 133         *minor_status = ret;
 134         major_status = GSS_S_FAILURE;
 135         goto out;
 136     }
 137
 138     if (keytab_principal) {
 139         ret = krb5_unparse_name(context, keytab_principal, &str);
 140         if (ret == 0) {
 141             ret = krb5_store_string(sp, str);
 142             free(str);
 143         }
 144     } else
 145         krb5_store_string(sp, "");
 146     if (ret) {
 147         *minor_status = ret;
 148         major_status = GSS_S_FAILURE;
 149         goto out;
 150     }
 151
 152
 153     if (keytab) {
 154         ret = krb5_kt_get_full_name(context, keytab, &str);
 155         if (ret == 0) {
 156             ret = krb5_store_string(sp, str);
 157             free(str);
 158         }
 159     } else
 160         krb5_store_string(sp, "");
 161     if (ret) {
 162         *minor_status = ret;
 163         major_status = GSS_S_FAILURE;
 164         goto out;
 165     }
 166
 167     ret = krb5_storage_to_data(sp, &data);
 168     if (ret) {
 169         *minor_status = ret;
 170         major_status = GSS_S_FAILURE;
 171         goto out;
 172     }
 173
 174     buffer.value = data.data;
 175     buffer.length = data.length;
 176
 177     major_status = gss_set_cred_option(minor_status,
 178                                        cred,
 179                                        GSS_KRB5_IMPORT_CRED_X,
 180                                        &buffer);
 181     krb5_data_free(&data);
 182 out:
 183     if (sp)
 184         krb5_storage_free(sp);
 185     krb5_free_context(context);
 186     return major_status;
 187 }
 188
 189 OM_uint32
 190 gsskrb5_register_acceptor_identity(const char *identity)
 191 {
 192         struct _gss_mech_switch *m;
 193         gss_buffer_desc buffer;
 194         OM_uint32 junk;
 195
 196         _gss_load_mech();
 197
 198         buffer.value = rk_UNCONST(identity);
 199         buffer.length = strlen(identity);
 200
 201         SLIST_FOREACH(m, &_gss_mechs, gm_link) {
 202                 if (m->gm_mech.gm_set_sec_context_option == NULL)
 203                         continue;
 204                 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 205                     GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X, &buffer);
 206         }
 207
 208         return (GSS_S_COMPLETE);
 209 }
 210
 211 OM_uint32
 212 gsskrb5_set_dns_canonicalize(int flag)
 213 {
 214         struct _gss_mech_switch *m;
 215         gss_buffer_desc buffer;
 216         OM_uint32 junk;
 217         char b = (flag != 0);
 218
 219         _gss_load_mech();
 220
 221         buffer.value = &b;
 222         buffer.length = sizeof(b);
 223
 224         SLIST_FOREACH(m, &_gss_mechs, gm_link) {
 225                 if (m->gm_mech.gm_set_sec_context_option == NULL)
 226                         continue;
 227                 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 228                     GSS_KRB5_SET_DNS_CANONICALIZE_X, &buffer);
 229         }
 230
 231         return (GSS_S_COMPLETE);
 232 }
 233
 234
 235
 236 static krb5_error_code
 237 set_key(krb5_keyblock *keyblock, gss_krb5_lucid_key_t *key)
 238 {
 239     key->type = keyblock->keytype;
 240     key->length = keyblock->keyvalue.length;
 241     key->data = malloc(key->length);
 242     if (key->data == NULL && key->length != 0)
 243         return ENOMEM;
 244     memcpy(key->data, keyblock->keyvalue.data, key->length);
 245     return 0;
 246 }
 247
 248 static void
 249 free_key(gss_krb5_lucid_key_t *key)
 250 {
 251     memset(key->data, 0, key->length);
 252     free(key->data);
 253     memset(key, 0, sizeof(*key));
 254 }
 255
 256 OM_uint32
 257 gss_krb5_export_lucid_sec_context(OM_uint32 *minor_status,
 258                                   gss_ctx_id_t *context_handle,
 259                                   OM_uint32 version,
 260                                   void **rctx)
 261 {
 262     krb5_context context = NULL;
 263     krb5_error_code ret;
 264     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 265     OM_uint32 major_status;
 266     gss_krb5_lucid_context_v1_t *ctx = NULL;
 267     krb5_storage *sp = NULL;
 268     uint32_t num;
 269
 270     if (context_handle == NULL
 271         || *context_handle == GSS_C_NO_CONTEXT
 272         || version != 1)
 273     {
 274         ret = EINVAL;
 275         return GSS_S_FAILURE;
 276     }
 277
 278     major_status =
 279         gss_inquire_sec_context_by_oid (minor_status,
 280                                         *context_handle,
 281                                         GSS_KRB5_EXPORT_LUCID_CONTEXT_V1_X,
 282                                         &data_set);
 283     if (major_status)
 284         return major_status;
 285
 286     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 287         gss_release_buffer_set(minor_status, &data_set);
 288         *minor_status = EINVAL;
 289         return GSS_S_FAILURE;
 290     }
 291
 292     ret = krb5_init_context(&context);
 293     if (ret)
 294         goto out;
 295
 296     ctx = calloc(1, sizeof(*ctx));
 297     if (ctx == NULL) {
 298         ret = ENOMEM;
 299         goto out;
 300     }
 301
 302     sp = krb5_storage_from_mem(data_set->elements[0].value,
 303                                data_set->elements[0].length);
 304     if (sp == NULL) {
 305         ret = ENOMEM;
 306         goto out;
 307     }
 308
 309     ret = krb5_ret_uint32(sp, &num);
 310     if (ret) goto out;
 311     if (num != 1) {
 312         ret = EINVAL;
 313         goto out;
 314     }
 315     ctx->version = 1;
 316     /* initiator */
 317     ret = krb5_ret_uint32(sp, &ctx->initiate);
 318     if (ret) goto out;
 319     /* endtime */
 320     ret = krb5_ret_uint32(sp, &ctx->endtime);
 321     if (ret) goto out;
 322     /* send_seq */
 323     ret = krb5_ret_uint32(sp, &num);
 324     if (ret) goto out;
 325     ctx->send_seq = ((uint64_t)num) << 32;
 326     ret = krb5_ret_uint32(sp, &num);
 327     if (ret) goto out;
 328     ctx->send_seq |= num;
 329     /* recv_seq */
 330     ret = krb5_ret_uint32(sp, &num);
 331     if (ret) goto out;
 332     ctx->recv_seq = ((uint64_t)num) << 32;
 333     ret = krb5_ret_uint32(sp, &num);
 334     if (ret) goto out;
 335     ctx->recv_seq |= num;
 336     /* protocol */
 337     ret = krb5_ret_uint32(sp, &ctx->protocol);
 338     if (ret) goto out;
 339     if (ctx->protocol == 0) {
 340         krb5_keyblock key;
 341
 342         /* sign_alg */
 343         ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.sign_alg);
 344         if (ret) goto out;
 345         /* seal_alg */
 346         ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.seal_alg);
 347         if (ret) goto out;
 348         /* ctx_key */
 349         ret = krb5_ret_keyblock(sp, &key);
 350         if (ret) goto out;
 351         ret = set_key(&key, &ctx->rfc1964_kd.ctx_key);
 352         krb5_free_keyblock_contents(context, &key);
 353         if (ret) goto out;
 354     } else if (ctx->protocol == 1) {
 355         krb5_keyblock key;
 356
 357         /* acceptor_subkey */
 358         ret = krb5_ret_uint32(sp, &ctx->cfx_kd.have_acceptor_subkey);
 359         if (ret) goto out;
 360         /* ctx_key */
 361         ret = krb5_ret_keyblock(sp, &key);
 362         if (ret) goto out;
 363         ret = set_key(&key, &ctx->cfx_kd.ctx_key);
 364         krb5_free_keyblock_contents(context, &key);
 365         if (ret) goto out;
 366         /* acceptor_subkey */
 367         if (ctx->cfx_kd.have_acceptor_subkey) {
 368             ret = krb5_ret_keyblock(sp, &key);
 369             if (ret) goto out;
 370             ret = set_key(&key, &ctx->cfx_kd.acceptor_subkey);
 371             krb5_free_keyblock_contents(context, &key);
 372             if (ret) goto out;
 373         }
 374     } else {
 375         ret = EINVAL;
 376         goto out;
 377     }
 378
 379     *rctx = ctx;
 380
 381 out:
 382     gss_release_buffer_set(minor_status, &data_set);
 383     if (sp)
 384         krb5_storage_free(sp);
 385     if (context)
 386         krb5_free_context(context);
 387
 388     if (ret) {
 389         if (ctx)
 390             gss_krb5_free_lucid_sec_context(NULL, ctx);
 391
 392         *minor_status = ret;
 393         return GSS_S_FAILURE;
 394     }
 395     *minor_status = 0;
 396     return GSS_S_COMPLETE;
 397 }
 398
 399 OM_uint32
 400 gss_krb5_free_lucid_sec_context(OM_uint32 *minor_status, void *c)
 401 {
 402     gss_krb5_lucid_context_v1_t *ctx = c;
 403
 404     if (ctx->version != 1) {
 405         if (minor_status)
 406             *minor_status = 0;
 407         return GSS_S_FAILURE;
 408     }
 409
 410     if (ctx->protocol == 0) {
 411         free_key(&ctx->rfc1964_kd.ctx_key);
 412     } else if (ctx->protocol == 1) {
 413         free_key(&ctx->cfx_kd.ctx_key);
 414         if (ctx->cfx_kd.have_acceptor_subkey)
 415             free_key(&ctx->cfx_kd.acceptor_subkey);
 416     }
 417     free(ctx);
 418     if (minor_status)
 419         *minor_status = 0;
 420     return GSS_S_COMPLETE;
 421 }
 422
 423 /*
 424  *
 425  */
 426
 427 OM_uint32
 428 gss_krb5_set_allowable_enctypes(OM_uint32 *minor_status,
 429                                 gss_cred_id_t cred,
 430                                 OM_uint32 num_enctypes,
 431                                 int32_t *enctypes)
 432 {
 433     krb5_error_code ret;
 434     OM_uint32 maj_status;
 435     gss_buffer_desc buffer;
 436     krb5_storage *sp;
 437     krb5_data data;
 438     int i;
 439
 440     sp = krb5_storage_emem();
 441     if (sp == NULL) {
 442         *minor_status = ENOMEM;
 443         maj_status = GSS_S_FAILURE;
 444         goto out;
 445     }
 446
 447     for (i = 0; i < num_enctypes; i++) {
 448         ret = krb5_store_int32(sp, enctypes[i]);
 449         if (ret) {
 450             *minor_status = ret;
 451             maj_status = GSS_S_FAILURE;
 452             goto out;
 453         }
 454     }
 455
 456     ret = krb5_storage_to_data(sp, &data);
 457     if (ret) {
 458         *minor_status = ret;
 459         maj_status = GSS_S_FAILURE;
 460         goto out;
 461     }
 462
 463     buffer.value = data.data;
 464     buffer.length = data.length;
 465
 466     maj_status = gss_set_cred_option(minor_status,
 467                                      &cred,
 468                                      GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X,
 469                                      &buffer);
 470     krb5_data_free(&data);
 471 out:
 472     if (sp)
 473         krb5_storage_free(sp);
 474     return maj_status;
 475 }
 476
 477 /*
 478  *
 479  */
 480
 481 OM_uint32
 482 gsskrb5_set_send_to_kdc(struct gsskrb5_send_to_kdc *c)
 483 {
 484     struct _gss_mech_switch *m;
 485     gss_buffer_desc buffer;
 486     OM_uint32 junk;
 487
 488     _gss_load_mech();
 489
 490     if (c) {
 491         buffer.value = c;
 492         buffer.length = sizeof(*c);
 493     } else {
 494         buffer.value = NULL;
 495         buffer.length = 0;
 496     }
 497
 498     SLIST_FOREACH(m, &_gss_mechs, gm_link) {
 499         if (m->gm_mech.gm_set_sec_context_option == NULL)
 500             continue;
 501         m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 502             GSS_KRB5_SEND_TO_KDC_X, &buffer);
 503     }
 504
 505     return (GSS_S_COMPLETE);
 506 }
 507
 508 /*
 509  *
 510  */
 511
 512 OM_uint32
 513 gss_krb5_ccache_name(OM_uint32 *minor_status,
 514                      const char *name,
 515                      const char **out_name)
 516 {
 517     struct _gss_mech_switch *m;
 518     gss_buffer_desc buffer;
 519     OM_uint32 junk;
 520
 521     _gss_load_mech();
 522
 523     if (out_name)
 524         *out_name = NULL;
 525
 526     buffer.value = rk_UNCONST(name);
 527     buffer.length = strlen(name);
 528
 529     SLIST_FOREACH(m, &_gss_mechs, gm_link) {
 530         if (m->gm_mech.gm_set_sec_context_option == NULL)
 531             continue;
 532         m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 533             GSS_KRB5_CCACHE_NAME_X, &buffer);
 534     }
 535
 536     return (GSS_S_COMPLETE);
 537 }
 538
 539
 540 /*
 541  *
 542  */
 543
 544 OM_uint32
 545 gsskrb5_extract_authtime_from_sec_context(OM_uint32 *minor_status,
 546                                           gss_ctx_id_t context_handle,
 547                                           time_t *authtime)
 548 {
 549     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 550     OM_uint32 maj_stat;
 551
 552     if (context_handle == GSS_C_NO_CONTEXT) {
 553         *minor_status = EINVAL;
 554         return GSS_S_FAILURE;
 555     }
 556
 557     maj_stat =
 558         gss_inquire_sec_context_by_oid (minor_status,
 559                                         context_handle,
 560                                         GSS_KRB5_GET_AUTHTIME_X,
 561                                         &data_set);
 562     if (maj_stat)
 563         return maj_stat;
 564
 565     if (data_set == GSS_C_NO_BUFFER_SET) {
 566         gss_release_buffer_set(minor_status, &data_set);
 567         *minor_status = EINVAL;
 568         return GSS_S_FAILURE;
 569     }
 570
 571     if (data_set->count != 1) {
 572         gss_release_buffer_set(minor_status, &data_set);
 573         *minor_status = EINVAL;
 574         return GSS_S_FAILURE;
 575     }
 576
 577     if (data_set->elements[0].length != 4) {
 578         gss_release_buffer_set(minor_status, &data_set);
 579         *minor_status = EINVAL;
 580         return GSS_S_FAILURE;
 581     }
 582
 583     {
 584         unsigned char *buf = data_set->elements[0].value;
 585         *authtime = (buf[3] <<24) | (buf[2] << 16) |
 586             (buf[1] << 8) | (buf[0] << 0);
 587     }
 588
 589     gss_release_buffer_set(minor_status, &data_set);
 590
 591     *minor_status = 0;
 592     return GSS_S_COMPLETE;
 593 }
 594
 595 /*
 596  *
 597  */
 598
 599 OM_uint32
 600 gsskrb5_extract_authz_data_from_sec_context(OM_uint32 *minor_status,
 601                                             gss_ctx_id_t context_handle,
 602                                             int ad_type,
 603                                             gss_buffer_t ad_data)
 604 {
 605     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 606     OM_uint32 maj_stat;
 607     gss_OID_desc oid_flat;
 608     heim_oid baseoid, oid;
 609     size_t size;
 610
 611     if (context_handle == GSS_C_NO_CONTEXT) {
 612         *minor_status = EINVAL;
 613         return GSS_S_FAILURE;
 614     }
 615
 616     /* All this to append an integer to an oid... */
 617
 618     if (der_get_oid(GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->elements,
 619                     GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->length,
 620                     &baseoid, NULL) != 0) {
 621         *minor_status = EINVAL;
 622         return GSS_S_FAILURE;
 623     }
 624
 625     oid.length = baseoid.length + 1;
 626     oid.components = calloc(oid.length, sizeof(*oid.components));
 627     if (oid.components == NULL) {
 628         der_free_oid(&baseoid);
 629
 630         *minor_status = ENOMEM;
 631         return GSS_S_FAILURE;
 632     }
 633
 634     memcpy(oid.components, baseoid.components,
 635            baseoid.length * sizeof(*baseoid.components));
 636
 637     der_free_oid(&baseoid);
 638
 639     oid.components[oid.length - 1] = ad_type;
 640
 641     oid_flat.length = der_length_oid(&oid);
 642     oid_flat.elements = malloc(oid_flat.length);
 643     if (oid_flat.elements == NULL) {
 644         free(oid.components);
 645         *minor_status = ENOMEM;
 646         return GSS_S_FAILURE;
 647     }
 648
 649     if (der_put_oid((unsigned char *)oid_flat.elements + oid_flat.length - 1,
 650                     oid_flat.length, &oid, &size) != 0) {
 651         free(oid.components);
 652         free(oid_flat.elements);
 653         *minor_status = EINVAL;
 654         return GSS_S_FAILURE;
 655     }
 656     if (oid_flat.length != size)
 657         abort();
 658
 659     free(oid.components);
 660
 661     /* FINALLY, we have the OID */
 662
 663     maj_stat = gss_inquire_sec_context_by_oid (minor_status,
 664                                                context_handle,
 665                                                &oid_flat,
 666                                                &data_set);
 667
 668     free(oid_flat.elements);
 669
 670     if (maj_stat)
 671         return maj_stat;
 672
 673     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 674         gss_release_buffer_set(minor_status, &data_set);
 675         *minor_status = EINVAL;
 676         return GSS_S_FAILURE;
 677     }
 678
 679     ad_data->value = malloc(data_set->elements[0].length);
 680     if (ad_data->value == NULL) {
 681         gss_release_buffer_set(minor_status, &data_set);
 682         *minor_status = ENOMEM;
 683         return GSS_S_FAILURE;
 684     }
 685
 686     ad_data->length = data_set->elements[0].length;
 687     memcpy(ad_data->value, data_set->elements[0].value, ad_data->length);
 688     gss_release_buffer_set(minor_status, &data_set);
 689
 690     *minor_status = 0;
 691     return GSS_S_COMPLETE;
 692 }
 693
 694 /*
 695  *
 696  */
 697
 698 static OM_uint32
 699 gsskrb5_extract_key(OM_uint32 *minor_status,
 700                     gss_ctx_id_t context_handle,
 701                     const gss_OID oid,
 702                     krb5_keyblock **keyblock)
 703 {
 704     krb5_error_code ret;
 705     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 706     OM_uint32 major_status;
 707     krb5_context context = NULL;
 708     krb5_storage *sp = NULL;
 709
 710     if (context_handle == GSS_C_NO_CONTEXT) {
 711         ret = EINVAL;
 712         return GSS_S_FAILURE;
 713     }
 714
 715     ret = krb5_init_context(&context);
 716     if(ret) {
 717         *minor_status = ret;
 718         return GSS_S_FAILURE;
 719     }
 720
 721     major_status =
 722         gss_inquire_sec_context_by_oid (minor_status,
 723                                         context_handle,
 724                                         oid,
 725                                         &data_set);
 726     if (major_status)
 727         return major_status;
 728
 729     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 730         gss_release_buffer_set(minor_status, &data_set);
 731         *minor_status = EINVAL;
 732         return GSS_S_FAILURE;
 733     }
 734
 735     sp = krb5_storage_from_mem(data_set->elements[0].value,
 736                                data_set->elements[0].length);
 737     if (sp == NULL) {
 738         ret = ENOMEM;
 739         goto out;
 740     }
 741
 742     *keyblock = calloc(1, sizeof(**keyblock));
 743     if (keyblock == NULL) {
 744         ret = ENOMEM;
 745         goto out;
 746     }
 747
 748     ret = krb5_ret_keyblock(sp, *keyblock);
 749
 750 out:
 751     gss_release_buffer_set(minor_status, &data_set);
 752     if (sp)
 753         krb5_storage_free(sp);
 754     if (ret && keyblock) {
 755         krb5_free_keyblock(context, *keyblock);
 756         *keyblock = NULL;
 757     }
 758     if (context)
 759         krb5_free_context(context);
 760
 761     *minor_status = ret;
 762     if (ret)
 763         return GSS_S_FAILURE;
 764
 765     return GSS_S_COMPLETE;
 766 }
 767
 768 /*
 769  *
 770  */
 771
 772 OM_uint32
 773 gsskrb5_extract_service_keyblock(OM_uint32 *minor_status,
 774                                  gss_ctx_id_t context_handle,
 775                                  krb5_keyblock **keyblock)
 776 {
 777     return gsskrb5_extract_key(minor_status,
 778                                context_handle,
 779                                GSS_KRB5_GET_SERVICE_KEYBLOCK_X,
 780                                keyblock);
 781 }
 782
 783 OM_uint32
 784 gsskrb5_get_initiator_subkey(OM_uint32 *minor_status,
 785                              gss_ctx_id_t context_handle,
 786                              krb5_keyblock **keyblock)
 787 {
 788     return gsskrb5_extract_key(minor_status,
 789                                context_handle,
 790                                GSS_KRB5_GET_INITIATOR_SUBKEY_X,
 791                                keyblock);
 792 }
 793
 794 OM_uint32
 795 gsskrb5_get_subkey(OM_uint32 *minor_status,
 796                    gss_ctx_id_t context_handle,
 797                    krb5_keyblock **keyblock)
 798 {
 799     return gsskrb5_extract_key(minor_status,
 800                                context_handle,
 801                                GSS_KRB5_GET_SUBKEY_X,
 802                                keyblock);
 803 }
 804
 805 OM_uint32
 806 gsskrb5_set_default_realm(const char *realm)
 807 {
 808         struct _gss_mech_switch *m;
 809         gss_buffer_desc buffer;
 810         OM_uint32 junk;
 811
 812         _gss_load_mech();
 813
 814         buffer.value = rk_UNCONST(realm);
 815         buffer.length = strlen(realm);
 816
 817         SLIST_FOREACH(m, &_gss_mechs, gm_link) {
 818                 if (m->gm_mech.gm_set_sec_context_option == NULL)
 819                         continue;
 820                 m->gm_mech.gm_set_sec_context_option(&junk, NULL,
 821                     GSS_KRB5_SET_DEFAULT_REALM_X, &buffer);
 822         }
 823
 824         return (GSS_S_COMPLETE);
 825 }
 826
 827 OM_uint32
 828 gss_krb5_get_tkt_flags(OM_uint32 *minor_status,
 829                        gss_ctx_id_t context_handle,
 830                        OM_uint32 *tkt_flags)
 831 {
 832
 833     OM_uint32 major_status;
 834     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 835
 836     if (context_handle == GSS_C_NO_CONTEXT) {
 837         *minor_status = EINVAL;
 838         return GSS_S_FAILURE;
 839     }
 840
 841     major_status =
 842         gss_inquire_sec_context_by_oid (minor_status,
 843                                         context_handle,
 844                                         GSS_KRB5_GET_TKT_FLAGS_X,
 845                                         &data_set);
 846     if (major_status)
 847         return major_status;
 848
 849     if (data_set == GSS_C_NO_BUFFER_SET ||
 850         data_set->count != 1 ||
 851         data_set->elements[0].length < 4) {
 852         gss_release_buffer_set(minor_status, &data_set);
 853         *minor_status = EINVAL;
 854         return GSS_S_FAILURE;
 855     }
 856
 857     {
 858         const u_char *p = data_set->elements[0].value;
 859         *tkt_flags = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
 860     }
 861
 862     gss_release_buffer_set(minor_status, &data_set);
 863     return GSS_S_COMPLETE;
 864 }
 865