kerberos5/lib/libgssapi_krb5/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  *      $FreeBSD$
  27  */
  28
  29 #include <gssapi/gssapi.h>
  30 #include <gssapi/gssapi_krb5.h>
  31
  32 /* RCSID("$Id: gss_krb5.c 21889 2007-08-09 07:43:24Z lha $"); */
  33
  34 #include <krb5.h>
  35 #include <roken.h>
  36
  37 OM_uint32
  38 gss_krb5_copy_ccache(OM_uint32 *minor_status,
  39                      gss_cred_id_t cred,
  40                      krb5_ccache out)
  41 {
  42     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
  43     krb5_context context;
  44     krb5_error_code kret;
  45     krb5_ccache id;
  46     OM_uint32 ret;
  47     char *str;
  48
  49     ret = gss_inquire_cred_by_oid(minor_status,
  50                                   cred,
  51                                   GSS_KRB5_COPY_CCACHE_X,
  52                                   &data_set);
  53     if (ret)
  54         return ret;
  55
  56     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
  57         gss_release_buffer_set(minor_status, &data_set);
  58         *minor_status = EINVAL;
  59         return GSS_S_FAILURE;
  60     }
  61
  62     kret = krb5_init_context(&context);
  63     if (kret) {
  64         *minor_status = kret;
  65         gss_release_buffer_set(minor_status, &data_set);
  66         return GSS_S_FAILURE;
  67     }
  68
  69     kret = asprintf(&str, "%.*s", (int)data_set->elements[0].length,
  70                     (char *)data_set->elements[0].value);
  71     gss_release_buffer_set(minor_status, &data_set);
  72     if (kret == -1) {
  73         *minor_status = ENOMEM;
  74         return GSS_S_FAILURE;
  75     }
  76
  77     kret = krb5_cc_resolve(context, str, &id);
  78     free(str);
  79     if (kret) {
  80         *minor_status = kret;
  81         return GSS_S_FAILURE;
  82     }
  83
  84     kret = krb5_cc_copy_cache(context, id, out);
  85     krb5_cc_close(context, id);
  86     krb5_free_context(context);
  87     if (kret) {
  88         *minor_status = kret;
  89         return GSS_S_FAILURE;
  90     }
  91
  92     return ret;
  93 }
  94
  95 OM_uint32
  96 gss_krb5_import_cred(OM_uint32 *minor_status,
  97                      krb5_ccache id,
  98                      krb5_principal keytab_principal,
  99                      krb5_keytab keytab,
 100                      gss_cred_id_t *cred)
 101 {
 102     gss_buffer_desc buffer;
 103     OM_uint32 major_status;
 104     krb5_context context;
 105     krb5_error_code ret;
 106     krb5_storage *sp;
 107     krb5_data data;
 108     char *str;
 109
 110     *cred = GSS_C_NO_CREDENTIAL;
 111
 112     ret = krb5_init_context(&context);
 113     if (ret) {
 114         *minor_status = ret;
 115         return GSS_S_FAILURE;
 116     }
 117
 118     sp = krb5_storage_emem();
 119     if (sp == NULL) {
 120         *minor_status = ENOMEM;
 121         major_status = GSS_S_FAILURE;
 122         goto out;
 123     }
 124
 125     if (id) {
 126         ret = krb5_cc_get_full_name(context, id, &str);
 127         if (ret == 0) {
 128             ret = krb5_store_string(sp, str);
 129             free(str);
 130         }
 131     } else
 132         ret = krb5_store_string(sp, "");
 133     if (ret) {
 134         *minor_status = ret;
 135         major_status = GSS_S_FAILURE;
 136         goto out;
 137     }
 138
 139     if (keytab_principal) {
 140         ret = krb5_unparse_name(context, keytab_principal, &str);
 141         if (ret == 0) {
 142             ret = krb5_store_string(sp, str);
 143             free(str);
 144         }
 145     } else
 146         krb5_store_string(sp, "");
 147     if (ret) {
 148         *minor_status = ret;
 149         major_status = GSS_S_FAILURE;
 150         goto out;
 151     }
 152
 153
 154     if (keytab) {
 155         ret = krb5_kt_get_full_name(context, keytab, &str);
 156         if (ret == 0) {
 157             ret = krb5_store_string(sp, str);
 158             free(str);
 159         }
 160     } else
 161         krb5_store_string(sp, "");
 162     if (ret) {
 163         *minor_status = ret;
 164         major_status = GSS_S_FAILURE;
 165         goto out;
 166     }
 167
 168     ret = krb5_storage_to_data(sp, &data);
 169     if (ret) {
 170         *minor_status = ret;
 171         major_status = GSS_S_FAILURE;
 172         goto out;
 173     }
 174
 175     buffer.value = data.data;
 176     buffer.length = data.length;
 177
 178     major_status = gss_set_cred_option(minor_status,
 179                                        cred,
 180                                        GSS_KRB5_IMPORT_CRED_X,
 181                                        &buffer);
 182     krb5_data_free(&data);
 183 out:
 184     if (sp)
 185         krb5_storage_free(sp);
 186     krb5_free_context(context);
 187     return major_status;
 188 }
 189
 190 OM_uint32
 191 gsskrb5_register_acceptor_identity(const char *identity)
 192 {
 193         gss_buffer_desc buffer;
 194         OM_uint32 junk;
 195
 196         buffer.value = rk_UNCONST(identity);
 197         buffer.length = strlen(identity);
 198
 199         gss_set_sec_context_option(&junk, NULL,
 200             GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X, &buffer);
 201
 202         return (GSS_S_COMPLETE);
 203 }
 204
 205 OM_uint32
 206 gsskrb5_set_dns_canonicalize(int flag)
 207 {
 208         gss_buffer_desc buffer;
 209         OM_uint32 junk;
 210         char b = (flag != 0);
 211
 212         buffer.value = &b;
 213         buffer.length = sizeof(b);
 214
 215         gss_set_sec_context_option(&junk, NULL,
 216             GSS_KRB5_SET_DNS_CANONICALIZE_X, &buffer);
 217
 218         return (GSS_S_COMPLETE);
 219 }
 220
 221
 222
 223 static krb5_error_code
 224 set_key(krb5_keyblock *keyblock, gss_krb5_lucid_key_t *key)
 225 {
 226     key->type = keyblock->keytype;
 227     key->length = keyblock->keyvalue.length;
 228     key->data = malloc(key->length);
 229     if (key->data == NULL && key->length != 0)
 230         return ENOMEM;
 231     memcpy(key->data, keyblock->keyvalue.data, key->length);
 232     return 0;
 233 }
 234
 235 static void
 236 free_key(gss_krb5_lucid_key_t *key)
 237 {
 238     memset(key->data, 0, key->length);
 239     free(key->data);
 240     memset(key, 0, sizeof(*key));
 241 }
 242
 243 OM_uint32
 244 gss_krb5_export_lucid_sec_context(OM_uint32 *minor_status,
 245                                   gss_ctx_id_t *context_handle,
 246                                   OM_uint32 version,
 247                                   void **rctx)
 248 {
 249     krb5_context context = NULL;
 250     krb5_error_code ret;
 251     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 252     OM_uint32 major_status;
 253     gss_krb5_lucid_context_v1_t *ctx = NULL;
 254     krb5_storage *sp = NULL;
 255     uint32_t num;
 256
 257     if (context_handle == NULL
 258         || *context_handle == GSS_C_NO_CONTEXT
 259         || version != 1)
 260     {
 261         ret = EINVAL;
 262         return GSS_S_FAILURE;
 263     }
 264
 265     major_status =
 266         gss_inquire_sec_context_by_oid (minor_status,
 267                                         *context_handle,
 268                                         GSS_KRB5_EXPORT_LUCID_CONTEXT_V1_X,
 269                                         &data_set);
 270     if (major_status)
 271         return major_status;
 272
 273     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 274         gss_release_buffer_set(minor_status, &data_set);
 275         *minor_status = EINVAL;
 276         return GSS_S_FAILURE;
 277     }
 278
 279     ret = krb5_init_context(&context);
 280     if (ret)
 281         goto out;
 282
 283     ctx = calloc(1, sizeof(*ctx));
 284     if (ctx == NULL) {
 285         ret = ENOMEM;
 286         goto out;
 287     }
 288
 289     sp = krb5_storage_from_mem(data_set->elements[0].value,
 290                                data_set->elements[0].length);
 291     if (sp == NULL) {
 292         ret = ENOMEM;
 293         goto out;
 294     }
 295
 296     ret = krb5_ret_uint32(sp, &num);
 297     if (ret) goto out;
 298     if (num != 1) {
 299         ret = EINVAL;
 300         goto out;
 301     }
 302     ctx->version = 1;
 303     /* initiator */
 304     ret = krb5_ret_uint32(sp, &ctx->initiate);
 305     if (ret) goto out;
 306     /* endtime */
 307     ret = krb5_ret_uint32(sp, &ctx->endtime);
 308     if (ret) goto out;
 309     /* send_seq */
 310     ret = krb5_ret_uint32(sp, &num);
 311     if (ret) goto out;
 312     ctx->send_seq = ((uint64_t)num) << 32;
 313     ret = krb5_ret_uint32(sp, &num);
 314     if (ret) goto out;
 315     ctx->send_seq |= num;
 316     /* recv_seq */
 317     ret = krb5_ret_uint32(sp, &num);
 318     if (ret) goto out;
 319     ctx->recv_seq = ((uint64_t)num) << 32;
 320     ret = krb5_ret_uint32(sp, &num);
 321     if (ret) goto out;
 322     ctx->recv_seq |= num;
 323     /* protocol */
 324     ret = krb5_ret_uint32(sp, &ctx->protocol);
 325     if (ret) goto out;
 326     if (ctx->protocol == 0) {
 327         krb5_keyblock key;
 328
 329         /* sign_alg */
 330         ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.sign_alg);
 331         if (ret) goto out;
 332         /* seal_alg */
 333         ret = krb5_ret_uint32(sp, &ctx->rfc1964_kd.seal_alg);
 334         if (ret) goto out;
 335         /* ctx_key */
 336         ret = krb5_ret_keyblock(sp, &key);
 337         if (ret) goto out;
 338         ret = set_key(&key, &ctx->rfc1964_kd.ctx_key);
 339         krb5_free_keyblock_contents(context, &key);
 340         if (ret) goto out;
 341     } else if (ctx->protocol == 1) {
 342         krb5_keyblock key;
 343
 344         /* acceptor_subkey */
 345         ret = krb5_ret_uint32(sp, &ctx->cfx_kd.have_acceptor_subkey);
 346         if (ret) goto out;
 347         /* ctx_key */
 348         ret = krb5_ret_keyblock(sp, &key);
 349         if (ret) goto out;
 350         ret = set_key(&key, &ctx->cfx_kd.ctx_key);
 351         krb5_free_keyblock_contents(context, &key);
 352         if (ret) goto out;
 353         /* acceptor_subkey */
 354         if (ctx->cfx_kd.have_acceptor_subkey) {
 355             ret = krb5_ret_keyblock(sp, &key);
 356             if (ret) goto out;
 357             ret = set_key(&key, &ctx->cfx_kd.acceptor_subkey);
 358             krb5_free_keyblock_contents(context, &key);
 359             if (ret) goto out;
 360         }
 361     } else {
 362         ret = EINVAL;
 363         goto out;
 364     }
 365
 366     *rctx = ctx;
 367
 368 out:
 369     gss_release_buffer_set(minor_status, &data_set);
 370     if (sp)
 371         krb5_storage_free(sp);
 372     if (context)
 373         krb5_free_context(context);
 374
 375     if (ret) {
 376         if (ctx)
 377             gss_krb5_free_lucid_sec_context(NULL, ctx);
 378
 379         *minor_status = ret;
 380         return GSS_S_FAILURE;
 381     }
 382     *minor_status = 0;
 383     return GSS_S_COMPLETE;
 384 }
 385
 386 OM_uint32
 387 gss_krb5_free_lucid_sec_context(OM_uint32 *minor_status, void *c)
 388 {
 389     gss_krb5_lucid_context_v1_t *ctx = c;
 390
 391     if (ctx->version != 1) {
 392         if (minor_status)
 393             *minor_status = 0;
 394         return GSS_S_FAILURE;
 395     }
 396
 397     if (ctx->protocol == 0) {
 398         free_key(&ctx->rfc1964_kd.ctx_key);
 399     } else if (ctx->protocol == 1) {
 400         free_key(&ctx->cfx_kd.ctx_key);
 401         if (ctx->cfx_kd.have_acceptor_subkey)
 402             free_key(&ctx->cfx_kd.acceptor_subkey);
 403     }
 404     free(ctx);
 405     if (minor_status)
 406         *minor_status = 0;
 407     return GSS_S_COMPLETE;
 408 }
 409
 410 /*
 411  *
 412  */
 413
 414 OM_uint32
 415 gss_krb5_set_allowable_enctypes(OM_uint32 *minor_status,
 416                                 gss_cred_id_t cred,
 417                                 OM_uint32 num_enctypes,
 418                                 int32_t *enctypes)
 419 {
 420     krb5_error_code ret;
 421     OM_uint32 maj_status;
 422     gss_buffer_desc buffer;
 423     krb5_storage *sp;
 424     krb5_data data;
 425     int i;
 426
 427     sp = krb5_storage_emem();
 428     if (sp == NULL) {
 429         *minor_status = ENOMEM;
 430         maj_status = GSS_S_FAILURE;
 431         goto out;
 432     }
 433
 434     for (i = 0; i < num_enctypes; i++) {
 435         ret = krb5_store_int32(sp, enctypes[i]);
 436         if (ret) {
 437             *minor_status = ret;
 438             maj_status = GSS_S_FAILURE;
 439             goto out;
 440         }
 441     }
 442
 443     ret = krb5_storage_to_data(sp, &data);
 444     if (ret) {
 445         *minor_status = ret;
 446         maj_status = GSS_S_FAILURE;
 447         goto out;
 448     }
 449
 450     buffer.value = data.data;
 451     buffer.length = data.length;
 452
 453     maj_status = gss_set_cred_option(minor_status,
 454                                      &cred,
 455                                      GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X,
 456                                      &buffer);
 457     krb5_data_free(&data);
 458 out:
 459     if (sp)
 460         krb5_storage_free(sp);
 461     return maj_status;
 462 }
 463
 464 /*
 465  *
 466  */
 467
 468 OM_uint32
 469 gsskrb5_set_send_to_kdc(struct gsskrb5_send_to_kdc *c)
 470 {
 471     gss_buffer_desc buffer;
 472     OM_uint32 junk;
 473
 474     if (c) {
 475         buffer.value = c;
 476         buffer.length = sizeof(*c);
 477     } else {
 478         buffer.value = NULL;
 479         buffer.length = 0;
 480     }
 481
 482     gss_set_sec_context_option(&junk, NULL,
 483             GSS_KRB5_SEND_TO_KDC_X, &buffer);
 484
 485     return (GSS_S_COMPLETE);
 486 }
 487
 488 /*
 489  *
 490  */
 491
 492 OM_uint32
 493 gss_krb5_ccache_name(OM_uint32 *minor_status,
 494                      const char *name,
 495                      const char **out_name)
 496 {
 497     gss_buffer_desc buffer;
 498     OM_uint32 junk;
 499
 500     if (out_name)
 501         *out_name = NULL;
 502
 503     buffer.value = rk_UNCONST(name);
 504     buffer.length = strlen(name);
 505
 506     gss_set_sec_context_option(&junk, NULL,
 507             GSS_KRB5_CCACHE_NAME_X, &buffer);
 508
 509     return (GSS_S_COMPLETE);
 510 }
 511
 512
 513 /*
 514  *
 515  */
 516
 517 OM_uint32
 518 gsskrb5_extract_authtime_from_sec_context(OM_uint32 *minor_status,
 519                                           gss_ctx_id_t context_handle,
 520                                           time_t *authtime)
 521 {
 522     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 523     OM_uint32 maj_stat;
 524
 525     if (context_handle == GSS_C_NO_CONTEXT) {
 526         *minor_status = EINVAL;
 527         return GSS_S_FAILURE;
 528     }
 529
 530     maj_stat =
 531         gss_inquire_sec_context_by_oid (minor_status,
 532                                         context_handle,
 533                                         GSS_KRB5_GET_AUTHTIME_X,
 534                                         &data_set);
 535     if (maj_stat)
 536         return maj_stat;
 537
 538     if (data_set == GSS_C_NO_BUFFER_SET) {
 539         gss_release_buffer_set(minor_status, &data_set);
 540         *minor_status = EINVAL;
 541         return GSS_S_FAILURE;
 542     }
 543
 544     if (data_set->count != 1) {
 545         gss_release_buffer_set(minor_status, &data_set);
 546         *minor_status = EINVAL;
 547         return GSS_S_FAILURE;
 548     }
 549
 550     if (data_set->elements[0].length != 4) {
 551         gss_release_buffer_set(minor_status, &data_set);
 552         *minor_status = EINVAL;
 553         return GSS_S_FAILURE;
 554     }
 555
 556     {
 557         unsigned char *buf = data_set->elements[0].value;
 558         *authtime = (buf[3] <<24) | (buf[2] << 16) |
 559             (buf[1] << 8) | (buf[0] << 0);
 560     }
 561
 562     gss_release_buffer_set(minor_status, &data_set);
 563
 564     *minor_status = 0;
 565     return GSS_S_COMPLETE;
 566 }
 567
 568 /*
 569  *
 570  */
 571
 572 OM_uint32
 573 gsskrb5_extract_authz_data_from_sec_context(OM_uint32 *minor_status,
 574                                             gss_ctx_id_t context_handle,
 575                                             int ad_type,
 576                                             gss_buffer_t ad_data)
 577 {
 578     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 579     OM_uint32 maj_stat;
 580     gss_OID_desc oid_flat;
 581     heim_oid baseoid, oid;
 582     size_t size;
 583
 584     if (context_handle == GSS_C_NO_CONTEXT) {
 585         *minor_status = EINVAL;
 586         return GSS_S_FAILURE;
 587     }
 588
 589     /* All this to append an integer to an oid... */
 590
 591     if (der_get_oid(GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->elements,
 592                     GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X->length,
 593                     &baseoid, NULL) != 0) {
 594         *minor_status = EINVAL;
 595         return GSS_S_FAILURE;
 596     }
 597
 598     oid.length = baseoid.length + 1;
 599     oid.components = calloc(oid.length, sizeof(*oid.components));
 600     if (oid.components == NULL) {
 601         der_free_oid(&baseoid);
 602
 603         *minor_status = ENOMEM;
 604         return GSS_S_FAILURE;
 605     }
 606
 607     memcpy(oid.components, baseoid.components,
 608            baseoid.length * sizeof(*baseoid.components));
 609
 610     der_free_oid(&baseoid);
 611
 612     oid.components[oid.length - 1] = ad_type;
 613
 614     oid_flat.length = der_length_oid(&oid);
 615     oid_flat.elements = malloc(oid_flat.length);
 616     if (oid_flat.elements == NULL) {
 617         free(oid.components);
 618         *minor_status = ENOMEM;
 619         return GSS_S_FAILURE;
 620     }
 621
 622     if (der_put_oid((unsigned char *)oid_flat.elements + oid_flat.length - 1,
 623                     oid_flat.length, &oid, &size) != 0) {
 624         free(oid.components);
 625         free(oid_flat.elements);
 626         *minor_status = EINVAL;
 627         return GSS_S_FAILURE;
 628     }
 629     if (oid_flat.length != size)
 630         abort();
 631
 632     free(oid.components);
 633
 634     /* FINALLY, we have the OID */
 635
 636     maj_stat = gss_inquire_sec_context_by_oid (minor_status,
 637                                                context_handle,
 638                                                &oid_flat,
 639                                                &data_set);
 640
 641     free(oid_flat.elements);
 642
 643     if (maj_stat)
 644         return maj_stat;
 645
 646     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 647         gss_release_buffer_set(minor_status, &data_set);
 648         *minor_status = EINVAL;
 649         return GSS_S_FAILURE;
 650     }
 651
 652     ad_data->value = malloc(data_set->elements[0].length);
 653     if (ad_data->value == NULL) {
 654         gss_release_buffer_set(minor_status, &data_set);
 655         *minor_status = ENOMEM;
 656         return GSS_S_FAILURE;
 657     }
 658
 659     ad_data->length = data_set->elements[0].length;
 660     memcpy(ad_data->value, data_set->elements[0].value, ad_data->length);
 661     gss_release_buffer_set(minor_status, &data_set);
 662
 663     *minor_status = 0;
 664     return GSS_S_COMPLETE;
 665 }
 666
 667 /*
 668  *
 669  */
 670
 671 static OM_uint32
 672 gsskrb5_extract_key(OM_uint32 *minor_status,
 673                     gss_ctx_id_t context_handle,
 674                     const gss_OID oid,
 675                     krb5_keyblock **keyblock)
 676 {
 677     krb5_error_code ret;
 678     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 679     OM_uint32 major_status;
 680     krb5_context context = NULL;
 681     krb5_storage *sp = NULL;
 682
 683     if (context_handle == GSS_C_NO_CONTEXT) {
 684         ret = EINVAL;
 685         return GSS_S_FAILURE;
 686     }
 687
 688     ret = krb5_init_context(&context);
 689     if(ret) {
 690         *minor_status = ret;
 691         return GSS_S_FAILURE;
 692     }
 693
 694     major_status =
 695         gss_inquire_sec_context_by_oid (minor_status,
 696                                         context_handle,
 697                                         oid,
 698                                         &data_set);
 699     if (major_status)
 700         return major_status;
 701
 702     if (data_set == GSS_C_NO_BUFFER_SET || data_set->count != 1) {
 703         gss_release_buffer_set(minor_status, &data_set);
 704         *minor_status = EINVAL;
 705         return GSS_S_FAILURE;
 706     }
 707
 708     sp = krb5_storage_from_mem(data_set->elements[0].value,
 709                                data_set->elements[0].length);
 710     if (sp == NULL) {
 711         ret = ENOMEM;
 712         goto out;
 713     }
 714
 715     *keyblock = calloc(1, sizeof(**keyblock));
 716     if (keyblock == NULL) {
 717         ret = ENOMEM;
 718         goto out;
 719     }
 720
 721     ret = krb5_ret_keyblock(sp, *keyblock);
 722
 723 out:
 724     gss_release_buffer_set(minor_status, &data_set);
 725     if (sp)
 726         krb5_storage_free(sp);
 727     if (ret && keyblock) {
 728         krb5_free_keyblock(context, *keyblock);
 729         *keyblock = NULL;
 730     }
 731     if (context)
 732         krb5_free_context(context);
 733
 734     *minor_status = ret;
 735     if (ret)
 736         return GSS_S_FAILURE;
 737
 738     return GSS_S_COMPLETE;
 739 }
 740
 741 /*
 742  *
 743  */
 744
 745 OM_uint32
 746 gsskrb5_extract_service_keyblock(OM_uint32 *minor_status,
 747                                  gss_ctx_id_t context_handle,
 748                                  krb5_keyblock **keyblock)
 749 {
 750     return gsskrb5_extract_key(minor_status,
 751                                context_handle,
 752                                GSS_KRB5_GET_SERVICE_KEYBLOCK_X,
 753                                keyblock);
 754 }
 755
 756 OM_uint32
 757 gsskrb5_get_initiator_subkey(OM_uint32 *minor_status,
 758                              gss_ctx_id_t context_handle,
 759                              krb5_keyblock **keyblock)
 760 {
 761     return gsskrb5_extract_key(minor_status,
 762                                context_handle,
 763                                GSS_KRB5_GET_INITIATOR_SUBKEY_X,
 764                                keyblock);
 765 }
 766
 767 OM_uint32
 768 gsskrb5_get_subkey(OM_uint32 *minor_status,
 769                    gss_ctx_id_t context_handle,
 770                    krb5_keyblock **keyblock)
 771 {
 772     return gsskrb5_extract_key(minor_status,
 773                                context_handle,
 774                                GSS_KRB5_GET_SUBKEY_X,
 775                                keyblock);
 776 }
 777
 778 OM_uint32
 779 gsskrb5_set_default_realm(const char *realm)
 780 {
 781         gss_buffer_desc buffer;
 782         OM_uint32 junk;
 783
 784         buffer.value = rk_UNCONST(realm);
 785         buffer.length = strlen(realm);
 786
 787         gss_set_sec_context_option(&junk, NULL,
 788             GSS_KRB5_SET_DEFAULT_REALM_X, &buffer);
 789
 790         return (GSS_S_COMPLETE);
 791 }
 792
 793 OM_uint32
 794 gss_krb5_get_tkt_flags(OM_uint32 *minor_status,
 795                        gss_ctx_id_t context_handle,
 796                        OM_uint32 *tkt_flags)
 797 {
 798
 799     OM_uint32 major_status;
 800     gss_buffer_set_t data_set = GSS_C_NO_BUFFER_SET;
 801
 802     if (context_handle == GSS_C_NO_CONTEXT) {
 803         *minor_status = EINVAL;
 804         return GSS_S_FAILURE;
 805     }
 806
 807     major_status =
 808         gss_inquire_sec_context_by_oid (minor_status,
 809                                         context_handle,
 810                                         GSS_KRB5_GET_TKT_FLAGS_X,
 811                                         &data_set);
 812     if (major_status)
 813         return major_status;
 814
 815     if (data_set == GSS_C_NO_BUFFER_SET ||
 816         data_set->count != 1 ||
 817         data_set->elements[0].length < 4) {
 818         gss_release_buffer_set(minor_status, &data_set);
 819         *minor_status = EINVAL;
 820         return GSS_S_FAILURE;
 821     }
 822
 823     {
 824         const u_char *p = data_set->elements[0].value;
 825         *tkt_flags = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
 826     }
 827
 828     gss_release_buffer_set(minor_status, &data_set);
 829     return GSS_S_COMPLETE;
 830 }
 831