util_reauth.c

   1 /*
   2  * Copyright (c) 2010, JANET(UK)
   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  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. Neither the name of JANET(UK) nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include "gssapiP_eap.h"
  34
  35 #include <dlfcn.h>
  36
  37 /*
  38  * Fast reauthentication support for EAP GSS.
  39  */
  40
  41 krb5_error_code
  42 krb5_encrypt_tkt_part(krb5_context, const krb5_keyblock *, krb5_ticket *);
  43
  44 krb5_error_code
  45 encode_krb5_ticket(const krb5_ticket *rep, krb5_data **code);
  46
  47 static krb5_error_code
  48 getAcceptorKey(krb5_context krbContext,
  49                gss_ctx_id_t ctx,
  50                gss_cred_id_t cred,
  51                krb5_principal *princ,
  52                krb5_keyblock *key)
  53 {
  54     krb5_error_code code;
  55     krb5_keytab keytab = NULL;
  56     krb5_keytab_entry ktent;
  57     krb5_kt_cursor cursor = NULL;
  58
  59     *princ = NULL;
  60     memset(key, 0, sizeof(*key));
  61     memset(&ktent, 0, sizeof(ktent));
  62
  63     code = krb5_kt_default(krbContext, &keytab);
  64     if (code != 0)
  65         goto cleanup;
  66
  67     if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
  68         code = krb5_kt_get_entry(krbContext, keytab,
  69                                  cred->name->krbPrincipal, 0,
  70                                  ctx->encryptionType, &ktent);
  71         if (code != 0)
  72             goto cleanup;
  73     } else {
  74         code = krb5_kt_start_seq_get(krbContext, keytab, &cursor);
  75         if (code != 0)
  76             goto cleanup;
  77
  78         while ((code = krb5_kt_next_entry(krbContext, keytab,
  79                                           &ktent, &cursor)) == 0) {
  80             if (ktent.key.enctype == ctx->encryptionType) {
  81                 break;
  82             } else {
  83                 krb5_free_keytab_entry_contents(krbContext, &ktent);
  84             }
  85         }
  86     }
  87
  88     if (code == 0) {
  89         *princ = ktent.principal;
  90         *key = ktent.key;
  91     }
  92
  93 cleanup:
  94     if (cred == GSS_C_NO_CREDENTIAL || cred->name == GSS_C_NO_NAME)
  95         krb5_kt_end_seq_get(krbContext, keytab, &cursor);
  96     krb5_kt_close(krbContext, keytab);
  97
  98     if (code != 0) {
  99         if (*princ != NULL) {
 100             krb5_free_principal(krbContext, *princ);
 101             *princ = NULL;
 102         }
 103         krb5_free_keyblock_contents(krbContext, key),
 104         memset(key, 0, sizeof(key));
 105     }
 106
 107     return code;
 108 }
 109
 110 OM_uint32
 111 gssEapMakeReauthCreds(OM_uint32 *minor,
 112                       gss_ctx_id_t ctx,
 113                       gss_cred_id_t cred,
 114                       gss_buffer_t credBuf)
 115 {
 116     OM_uint32 major = GSS_S_COMPLETE;
 117     krb5_error_code code;
 118     krb5_context krbContext = NULL;
 119     krb5_ticket ticket = { 0 };
 120     krb5_keyblock session, acceptorKey = { 0 };
 121     krb5_enc_tkt_part enc_part = { 0 };
 122     gss_buffer_desc attrBuf = GSS_C_EMPTY_BUFFER;
 123     krb5_authdata *authData[2], authDatum = { 0 };
 124     krb5_data *ticketData = NULL, *credsData = NULL;
 125     krb5_creds creds = { 0 };
 126     krb5_auth_context authContext = NULL;
 127
 128     credBuf->length = 0;
 129     credBuf->value = NULL;
 130
 131     GSSEAP_KRB_INIT(&krbContext);
 132
 133     code = getAcceptorKey(krbContext, ctx, cred,
 134                           &ticket.server, &acceptorKey);
 135     if (code == KRB5_KT_NOTFOUND) {
 136         gss_buffer_desc emptyToken = { 0, "" };
 137
 138         /*
 139          * If we can't produce the KRB-CRED message, we need to
 140          * return an empty (not NULL) token to the caller so we
 141          * don't change the number of authentication legs.
 142          */
 143         return duplicateBuffer(minor, &emptyToken, credBuf);
 144     } else if (code != 0)
 145         goto cleanup;
 146
 147     enc_part.flags = TKT_FLG_INITIAL;
 148
 149     code = krb5_c_make_random_key(krbContext, ctx->encryptionType,
 150                                   &session);
 151     if (code != 0)
 152         goto cleanup;
 153
 154     enc_part.session = &session;
 155     enc_part.client = ctx->initiatorName->krbPrincipal;
 156     enc_part.times.authtime = time(NULL);
 157     enc_part.times.starttime = enc_part.times.authtime;
 158     enc_part.times.endtime = ctx->expiryTime
 159                              ? ctx->expiryTime
 160                              : KRB5_INT32_MAX;
 161     enc_part.times.renew_till = 0;
 162
 163     major = gssEapExportAttrContext(minor, ctx->initiatorName,
 164                                     &attrBuf);
 165     if (GSS_ERROR(major))
 166         goto cleanup;
 167
 168     authDatum.ad_type = KRB5_AUTHDATA_RADIUS_AVP;
 169     authDatum.length = attrBuf.length;
 170     authDatum.contents = attrBuf.value;
 171     authData[0] = &authDatum;
 172     authData[1] = NULL;
 173     enc_part.authorization_data = authData;
 174
 175     ticket.enc_part2 = &enc_part;
 176
 177     code = encode_krb5_ticket(&ticket, &ticketData);
 178     if (code != 0)
 179         goto cleanup;
 180
 181     code = krb5_encrypt_tkt_part(krbContext, &acceptorKey, &ticket);
 182     if (code != 0)
 183         goto cleanup;
 184
 185     creds.client = enc_part.client;
 186     creds.server = ticket.server;
 187     creds.keyblock = session;
 188     creds.times = enc_part.times;
 189     creds.ticket_flags = enc_part.flags;
 190     creds.ticket = *ticketData;
 191     creds.authdata = authData;
 192
 193     code = krb5_auth_con_init(krbContext, &authContext);
 194     if (code != 0)
 195         goto cleanup;
 196
 197     code = krb5_auth_con_setflags(krbContext, authContext, 0);
 198     if (code != 0)
 199         goto cleanup;
 200
 201     code = krb5_auth_con_setsendsubkey(krbContext, authContext, &ctx->rfc3961Key);
 202     if (code != 0)
 203         goto cleanup;
 204
 205     code = krb5_mk_1cred(krbContext, authContext, &creds, &credsData, NULL);
 206     if (code != 0)
 207         goto cleanup;
 208
 209     krbDataToGssBuffer(credsData, credBuf);
 210
 211 cleanup:
 212     if (ticket.enc_part.ciphertext.data != NULL)
 213         GSSEAP_FREE(ticket.enc_part.ciphertext.data);
 214     krb5_free_keyblock_contents(krbContext, &session);
 215     krb5_free_keyblock_contents(krbContext, &acceptorKey);
 216     gss_release_buffer(minor, &attrBuf);
 217     krb5_free_data(krbContext, ticketData);
 218     krb5_auth_con_free(krbContext, authContext);
 219     if (credsData != NULL)
 220         GSSEAP_FREE(credsData);
 221
 222     if (major == GSS_S_COMPLETE) {
 223         *minor = code;
 224         major = code != 0 ? GSS_S_FAILURE : GSS_S_COMPLETE;
 225     }
 226
 227     return major;
 228 }
 229
 230 OM_uint32
 231 gssEapStoreReauthCreds(OM_uint32 *minor,
 232                        gss_ctx_id_t ctx,
 233                        gss_cred_id_t cred,
 234                        gss_buffer_t credBuf)
 235 {
 236     OM_uint32 major = GSS_S_COMPLETE, code;
 237     krb5_context krbContext = NULL;
 238     krb5_auth_context authContext = NULL;
 239     krb5_data credData = { 0 };
 240     krb5_creds **creds = NULL;
 241     krb5_principal canonPrinc;
 242     int i;
 243
 244     if (credBuf->length == 0 || cred == GSS_C_NO_CREDENTIAL)
 245         return GSS_S_COMPLETE;
 246
 247     GSSEAP_KRB_INIT(&krbContext);
 248
 249     code = krb5_auth_con_init(krbContext, &authContext);
 250     if (code != 0)
 251         goto cleanup;
 252
 253     code = krb5_auth_con_setflags(krbContext, authContext, 0);
 254     if (code != 0)
 255         goto cleanup;
 256
 257     code = krb5_auth_con_setrecvsubkey(krbContext, authContext,
 258                                        &ctx->rfc3961Key);
 259     if (code != 0)
 260         goto cleanup;
 261
 262     gssBufferToKrbData(credBuf, &credData);
 263
 264     code = krb5_rd_cred(krbContext, authContext, &credData, &creds, NULL);
 265     if (code != 0)
 266         goto cleanup;
 267
 268     if (creds == NULL || creds[0] == NULL)
 269         goto cleanup;
 270
 271     code = krb5_copy_principal(krbContext, creds[0]->client, &canonPrinc);
 272         goto cleanup;
 273
 274     krb5_free_principal(krbContext, cred->name->krbPrincipal);
 275     cred->name->krbPrincipal = canonPrinc;
 276
 277     cred->expiryTime = creds[0]->times.endtime;
 278
 279     code = krb5_cc_new_unique(krbContext, "MEMORY", NULL, &cred->krbCredCache);
 280     if (code != 0)
 281         goto cleanup;
 282
 283     code = krb5_cc_initialize(krbContext, cred->krbCredCache, creds[0]->client);
 284     if (code != 0)
 285         goto cleanup;
 286
 287     code = krb5_cc_store_cred(krbContext, cred->krbCredCache, creds[0]);
 288     if (code != 0)
 289         goto cleanup;
 290
 291     major = gss_krb5_import_cred(minor, cred->krbCredCache, NULL, NULL, &cred->krbCred);
 292     if (GSS_ERROR(major))
 293         goto cleanup;
 294
 295 cleanup:
 296     *minor = code;
 297
 298     krb5_auth_con_free(krbContext, authContext);
 299     if (creds != NULL) {
 300         for (i = 0; creds[i] != NULL; i++)
 301             krb5_free_creds(krbContext, creds[i]);
 302     }
 303     if (major == GSS_S_COMPLETE)
 304         major = *minor ? GSS_S_FAILURE : GSS_S_COMPLETE;
 305
 306     return major;
 307 }
 308
 309 static OM_uint32 (*gssInitSecContextNext)(
 310     OM_uint32 *minor,
 311     gss_cred_id_t cred,
 312     gss_ctx_id_t *context_handle,
 313     gss_name_t target_name,
 314     gss_OID mech_type,
 315     OM_uint32 req_flags,
 316     OM_uint32 time_req,
 317     gss_channel_bindings_t input_chan_bindings,
 318     gss_buffer_t input_token,
 319     gss_OID *actual_mech_type,
 320     gss_buffer_t output_token,
 321     OM_uint32 *ret_flags,
 322     OM_uint32 *time_rec);
 323
 324 static OM_uint32 (*gssAcceptSecContextNext)(
 325     OM_uint32 *minor,
 326     gss_ctx_id_t *context_handle,
 327     gss_cred_id_t cred,
 328     gss_buffer_t input_token,
 329     gss_channel_bindings_t input_chan_bindings,
 330     gss_name_t *src_name,
 331     gss_OID *mech_type,
 332     gss_buffer_t output_token,
 333     OM_uint32 *ret_flags,
 334     OM_uint32 *time_rec,
 335     gss_cred_id_t *delegated_cred_handle);
 336
 337 static OM_uint32 (*gssReleaseCredNext)(
 338     OM_uint32 *minor,
 339     gss_cred_id_t *cred_handle);
 340
 341 static OM_uint32 (*gssReleaseNameNext)(
 342     OM_uint32 *minor,
 343     gss_name_t *name);
 344
 345 static OM_uint32 (*gssInquireSecContextByOidNext)(
 346     OM_uint32 *minor,
 347     const gss_ctx_id_t context_handle,
 348     const gss_OID desired_object,
 349     gss_buffer_set_t *data_set);
 350
 351 static OM_uint32 (*gssDeleteSecContextNext)(
 352     OM_uint32 *minor,
 353     gss_ctx_id_t *context_handle,
 354     gss_buffer_t output_token);
 355
 356 static OM_uint32 (*gssDisplayNameNext)(
 357     OM_uint32 *minor,
 358     gss_name_t name,
 359     gss_buffer_t output_name_buffer,
 360     gss_OID *output_name_type);
 361
 362 static OM_uint32 (*gssImportNameNext)(
 363     OM_uint32 *minor,
 364     gss_buffer_t buffer,
 365     gss_OID nameType,
 366     gss_name_t *outputName);
 367
 368 static OM_uint32 (*gssKrbExtractAuthzDataFromSecContextNext)(
 369     OM_uint32 *minor,
 370     const gss_ctx_id_t context_handle,
 371     int ad_type,
 372     gss_buffer_t ad_data);
 373
 374 OM_uint32
 375 gssEapReauthInitialize(OM_uint32 *minor)
 376 {
 377     gssInitSecContextNext = dlsym(RTLD_NEXT, "gss_init_sec_context");
 378     gssAcceptSecContextNext = dlsym(RTLD_NEXT, "gss_accept_sec_context");
 379     gssReleaseCredNext = dlsym(RTLD_NEXT, "gss_release_cred");
 380     gssReleaseNameNext = dlsym(RTLD_NEXT, "gss_release_name");
 381     gssInquireSecContextByOidNext = dlsym(RTLD_NEXT, "gss_inquire_sec_context_by_oid");
 382     gssDeleteSecContextNext = dlsym(RTLD_NEXT, "gss_delete_sec_context");
 383     gssDisplayNameNext = dlsym(RTLD_NEXT, "gss_display_name");
 384     gssImportNameNext = dlsym(RTLD_NEXT, "gss_import_name");
 385     gssKrbExtractAuthzDataFromSecContextNext = dlsym(RTLD_NEXT, "gsskrb5_extract_authz_data_from_sec_context");
 386
 387     return GSS_S_COMPLETE;
 388 }
 389
 390 OM_uint32
 391 gssInitSecContext(OM_uint32 *minor,
 392                   gss_cred_id_t cred,
 393                   gss_ctx_id_t *context_handle,
 394                   gss_name_t target_name,
 395                   gss_OID mech_type,
 396                   OM_uint32 req_flags,
 397                   OM_uint32 time_req,
 398                   gss_channel_bindings_t input_chan_bindings,
 399                   gss_buffer_t input_token,
 400                   gss_OID *actual_mech_type,
 401                   gss_buffer_t output_token,
 402                   OM_uint32 *ret_flags,
 403                   OM_uint32 *time_rec)
 404 {
 405     if (gssInitSecContextNext == NULL)
 406         return GSS_S_UNAVAILABLE;
 407
 408     return gssInitSecContextNext(minor, cred, context_handle,
 409                                  target_name, mech_type, req_flags,
 410                                  time_req, input_chan_bindings,
 411                                  input_token, actual_mech_type,
 412                                  output_token, ret_flags, time_rec);
 413 }
 414
 415 OM_uint32
 416 gssAcceptSecContext(OM_uint32 *minor,
 417                     gss_ctx_id_t *context_handle,
 418                     gss_cred_id_t cred,
 419                     gss_buffer_t input_token,
 420                     gss_channel_bindings_t input_chan_bindings,
 421                     gss_name_t *src_name,
 422                     gss_OID *mech_type,
 423                     gss_buffer_t output_token,
 424                     OM_uint32 *ret_flags,
 425                     OM_uint32 *time_rec,
 426                     gss_cred_id_t *delegated_cred_handle)
 427 {
 428     if (gssAcceptSecContextNext == NULL)
 429         return GSS_S_UNAVAILABLE;
 430
 431     return gssAcceptSecContextNext(minor, context_handle, cred,
 432                                    input_token, input_chan_bindings,
 433                                    src_name, mech_type, output_token,
 434                                    ret_flags, time_rec, delegated_cred_handle);
 435 }
 436
 437 OM_uint32
 438 gssReleaseCred(OM_uint32 *minor,
 439                gss_cred_id_t *cred_handle)
 440 {
 441     if (gssReleaseCredNext == NULL)
 442         return GSS_S_UNAVAILABLE;
 443
 444     return gssReleaseCredNext(minor, cred_handle);
 445 }
 446
 447 OM_uint32
 448 gssReleaseName(OM_uint32 *minor,
 449                gss_name_t *name)
 450 {
 451     if (gssReleaseName == NULL)
 452         return GSS_S_UNAVAILABLE;
 453
 454     return gssReleaseNameNext(minor, name);
 455 }
 456
 457 OM_uint32
 458 gssDeleteSecContext(OM_uint32 *minor,
 459                     gss_ctx_id_t *context_handle,
 460                     gss_buffer_t output_token)
 461 {
 462     if (gssDeleteSecContextNext == NULL)
 463         return GSS_S_UNAVAILABLE;
 464
 465     return gssDeleteSecContextNext(minor, context_handle, output_token);
 466 }
 467
 468 static OM_uint32
 469 gssDisplayName(OM_uint32 *minor,
 470                gss_name_t name,
 471                gss_buffer_t buffer,
 472                gss_OID *name_type)
 473 {
 474     if (gssDisplayNameNext == NULL)
 475         return GSS_S_UNAVAILABLE;
 476
 477     return gssDisplayNameNext(minor, name, buffer, name_type);
 478 }
 479
 480 static OM_uint32
 481 gssImportName(OM_uint32 *minor,
 482               gss_buffer_t buffer,
 483               gss_OID name_type,
 484               gss_name_t *name)
 485 {
 486     if (gssImportNameNext == NULL)
 487         return GSS_S_UNAVAILABLE;
 488
 489     return gssImportNameNext(minor, buffer, name_type, name);
 490 }
 491
 492 OM_uint32
 493 gssInquireSecContextByOid(OM_uint32 *minor,
 494                           const gss_ctx_id_t context_handle,
 495                           const gss_OID desired_object,
 496                           gss_buffer_set_t *data_set)
 497 {
 498     if (gssInquireSecContextByOidNext == NULL)
 499         return GSS_S_UNAVAILABLE;
 500
 501     return gssInquireSecContextByOidNext(minor, context_handle,
 502                                          desired_object, data_set);
 503 }
 504
 505 OM_uint32
 506 gssKrbExtractAuthzDataFromSecContext(OM_uint32 *minor,
 507                                      const gss_ctx_id_t ctx,
 508                                      int ad_type,
 509                                      gss_buffer_t ad_data)
 510 {
 511     if (gssKrbExtractAuthzDataFromSecContextNext == NULL)
 512         return GSS_S_UNAVAILABLE;
 513
 514     return gssKrbExtractAuthzDataFromSecContext(minor, ctx, ad_type, ad_data);
 515 }
 516
 517 OM_uint32
 518 gssEapGlueToMechName(OM_uint32 *minor,
 519                      gss_name_t glueName,
 520                      gss_name_t *pMechName)
 521 {
 522     OM_uint32 major, tmpMinor;
 523     gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
 524
 525     *pMechName = GSS_C_NO_NAME;
 526
 527     major = gssDisplayName(minor, glueName, &nameBuf, NULL);
 528     if (GSS_ERROR(major))
 529         goto cleanup;
 530
 531     major = gssEapImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
 532                              pMechName);
 533     if (GSS_ERROR(major))
 534         goto cleanup;
 535
 536 cleanup:
 537     gss_release_buffer(&tmpMinor, &nameBuf);
 538
 539     return major;
 540 }
 541
 542 OM_uint32
 543 gssEapMechToGlueName(OM_uint32 *minor,
 544                      gss_name_t mechName,
 545                      gss_name_t *pGlueName)
 546 {
 547     OM_uint32 major, tmpMinor;
 548     gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
 549
 550     *pGlueName = GSS_C_NO_NAME;
 551
 552     major = gssEapDisplayName(minor, mechName, &nameBuf, NULL);
 553     if (GSS_ERROR(major))
 554         goto cleanup;
 555
 556     major = gssImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
 557                           pGlueName);
 558     if (GSS_ERROR(major))
 559         goto cleanup;
 560
 561 cleanup:
 562     gss_release_buffer(&tmpMinor, &nameBuf);
 563
 564     return major;
 565 }
 566
 567 OM_uint32
 568 gssEapReauthComplete(OM_uint32 *minor,
 569                     gss_ctx_id_t ctx,
 570                     gss_cred_id_t cred,
 571                     const gss_OID mech,
 572                     OM_uint32 timeRec)
 573 {
 574     OM_uint32 major, tmpMinor;
 575     gss_buffer_set_t keyData = GSS_C_NO_BUFFER_SET;
 576
 577     if (!oidEqual(mech, gss_mech_krb5)) {
 578         major = GSS_S_BAD_MECH;
 579         goto cleanup;
 580     }
 581
 582     major = gssInquireSecContextByOid(minor, ctx->kerberosCtx,
 583                                       GSS_C_INQ_SSPI_SESSION_KEY, &keyData);
 584     if (GSS_ERROR(major))
 585         goto cleanup;
 586
 587     {
 588         gss_OID_desc oid;
 589         int suffix;
 590
 591         oid.length = keyData->elements[1].length;
 592         oid.elements = keyData->elements[1].value;
 593
 594         /* GSS_KRB5_SESSION_KEY_ENCTYPE_OID */
 595         major = decomposeOid(minor,
 596                              "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x04",
 597                              10, &oid, &suffix);
 598         if (GSS_ERROR(major))
 599             goto cleanup;
 600
 601         ctx->encryptionType = suffix;
 602     }
 603
 604     {
 605         krb5_context krbContext = NULL;
 606         krb5_keyblock key;
 607
 608         GSSEAP_KRB_INIT(&krbContext);
 609
 610         KRB_KEY_LENGTH(&key) = keyData->elements[0].length;
 611         KRB_KEY_DATA(&key)   = keyData->elements[0].value;
 612         KRB_KEY_TYPE(&key)   = ctx->encryptionType;
 613
 614         *minor = krb5_copy_keyblock_contents(krbContext,
 615                                              &key, &ctx->rfc3961Key);
 616         if (*minor != 0) {
 617             major = GSS_S_FAILURE;
 618             goto cleanup;
 619         }
 620     }
 621
 622     major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
 623                                       &ctx->checksumType);
 624     if (GSS_ERROR(major))
 625         goto cleanup;
 626
 627     if (timeRec != GSS_C_INDEFINITE)
 628         ctx->expiryTime = time(NULL) + timeRec;
 629
 630     major = sequenceInit(minor,
 631                          &ctx->seqState, ctx->recvSeq,
 632                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
 633                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
 634                          TRUE);
 635     if (GSS_ERROR(major))
 636         goto cleanup;
 637
 638     ctx->mechanismUsed = GSS_EAP_MECHANISM;
 639     major = GSS_S_COMPLETE;
 640
 641 cleanup:
 642     gss_release_buffer_set(&tmpMinor, &keyData);
 643
 644     return major;
 645 }
 646