accept_sec_context.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 #ifdef GSSEAP_ENABLE_REAUTH
  36 static OM_uint32
  37 eapGssSmAcceptGssReauth(OM_uint32 *minor,
  38                         gss_ctx_id_t ctx,
  39                         gss_cred_id_t cred,
  40                         gss_buffer_t inputToken,
  41                         gss_channel_bindings_t chanBindings,
  42                         gss_buffer_t outputToken);
  43 #endif
  44
  45 /*
  46  * Mark a context as ready for cryptographic operations
  47  */
  48 static OM_uint32
  49 acceptReadyEap(OM_uint32 *minor, gss_ctx_id_t ctx, gss_cred_id_t cred)
  50 {
  51     OM_uint32 major, tmpMinor;
  52     VALUE_PAIR *vp;
  53     gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
  54
  55     /* Cache encryption type derived from selected mechanism OID */
  56     major = gssEapOidToEnctype(minor, ctx->mechanismUsed,
  57                                &ctx->encryptionType);
  58     if (GSS_ERROR(major))
  59         return major;
  60
  61     gssEapReleaseName(&tmpMinor, &ctx->initiatorName);
  62
  63     major = gssEapRadiusGetRawAvp(minor, ctx->acceptorCtx.vps,
  64                                   PW_USER_NAME, 0, &vp);
  65     if (major == GSS_S_COMPLETE) {
  66         nameBuf.length = vp->length;
  67         nameBuf.value = vp->vp_strvalue;
  68     } else {
  69         ctx->gssFlags |= GSS_C_ANON_FLAG;
  70     }
  71
  72     major = gssEapImportName(minor, &nameBuf, GSS_C_NT_USER_NAME,
  73                              &ctx->initiatorName);
  74     if (GSS_ERROR(major))
  75         return major;
  76
  77     major = gssEapRadiusGetRawAvp(minor, ctx->acceptorCtx.vps,
  78                                   PW_MS_MPPE_SEND_KEY, VENDORPEC_MS, &vp);
  79     if (GSS_ERROR(major))
  80         return major;
  81
  82     major = gssEapDeriveRfc3961Key(minor,
  83                                    vp->vp_octets,
  84                                    vp->length,
  85                                    ctx->encryptionType,
  86                                    &ctx->rfc3961Key);
  87     if (GSS_ERROR(major))
  88         return major;
  89
  90     major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
  91                                        &ctx->checksumType);
  92     if (GSS_ERROR(major))
  93         return major;
  94
  95     major = sequenceInit(minor,
  96                          &ctx->seqState, ctx->recvSeq,
  97                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
  98                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
  99                          TRUE);
 100     if (GSS_ERROR(major))
 101         return major;
 102
 103     ctx->initiatorName->attrCtx = gssEapCreateAttrContext(cred, ctx);
 104
 105     return GSS_S_COMPLETE;
 106 }
 107
 108 static OM_uint32
 109 eapGssSmAcceptIdentity(OM_uint32 *minor,
 110                        gss_ctx_id_t ctx,
 111                        gss_cred_id_t cred,
 112                        gss_buffer_t inputToken,
 113                        gss_channel_bindings_t chanBindings,
 114                        gss_buffer_t outputToken)
 115 {
 116     OM_uint32 major;
 117     union {
 118         struct eap_hdr pdu;
 119         unsigned char data[5];
 120     } pkt;
 121     gss_buffer_desc pktBuffer;
 122
 123     if (inputToken != GSS_C_NO_BUFFER && inputToken->length != 0)
 124         return GSS_S_DEFECTIVE_TOKEN;
 125
 126     assert(ctx->acceptorName == GSS_C_NO_NAME);
 127
 128     if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
 129         major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
 130         if (GSS_ERROR(major))
 131             return major;
 132     }
 133
 134     pkt.pdu.code = EAP_CODE_REQUEST;
 135     pkt.pdu.identifier = 0;
 136     pkt.pdu.length = htons(sizeof(pkt.data));
 137     pkt.data[4] = EAP_TYPE_IDENTITY;
 138
 139     pktBuffer.length = sizeof(pkt.data);
 140     pktBuffer.value = pkt.data;
 141
 142     major = duplicateBuffer(minor, &pktBuffer, outputToken);
 143     if (GSS_ERROR(major))
 144         return major;
 145
 146     ctx->state = EAP_STATE_AUTHENTICATE;
 147
 148     return GSS_S_CONTINUE_NEEDED;
 149 }
 150
 151 static OM_uint32
 152 setAcceptorIdentity(OM_uint32 *minor,
 153                     gss_ctx_id_t ctx,
 154                     VALUE_PAIR **vps)
 155 {
 156     OM_uint32 major;
 157     gss_buffer_desc nameBuf;
 158     krb5_context krbContext = NULL;
 159     krb5_principal krbPrinc;
 160     struct rs_handle *rh = ctx->acceptorCtx.radHandle;
 161
 162     assert(rh != NULL);
 163
 164     /* Awaits further specification */
 165     if (ctx->acceptorName == GSS_C_NO_NAME)
 166         return GSS_S_COMPLETE;
 167
 168     GSSEAP_KRB_INIT(&krbContext);
 169
 170     krbPrinc = ctx->acceptorName->krbPrincipal;
 171     assert(krbPrinc != NULL);
 172
 173     if (krb5_princ_size(krbContext, krbPrinc) < 2)
 174         return GSS_S_BAD_NAME;
 175
 176     /* Acceptor-Service-Name */
 177     krbDataToGssBuffer(krb5_princ_component(krbContext, krbPrinc, 0), &nameBuf);
 178
 179     major = gssEapRadiusAddAvp(minor, rh, vps,
 180                                PW_GSS_ACCEPTOR_SERVICE_NAME,
 181                                VENDORPEC_UKERNA,
 182                                &nameBuf);
 183     if (GSS_ERROR(major))
 184         return major;
 185
 186     /* Acceptor-Host-Name */
 187     krbDataToGssBuffer(krb5_princ_component(krbContext, krbPrinc, 1), &nameBuf);
 188
 189     major = gssEapRadiusAddAvp(minor, rh, vps,
 190                                PW_GSS_ACCEPTOR_HOST_NAME,
 191                                VENDORPEC_UKERNA,
 192                                &nameBuf);
 193     if (GSS_ERROR(major))
 194         return major;
 195
 196     if (krb5_princ_size(krbContext, krbPrinc) > 2) {
 197         /* Acceptor-Service-Specific */
 198         krb5_principal_data ssiPrinc = *krbPrinc;
 199         char *ssi;
 200
 201         krb5_princ_size(krbContext, &ssiPrinc) -= 2;
 202         krb5_princ_name(krbContext, &ssiPrinc) += 2;
 203
 204         *minor = krb5_unparse_name_flags(krbContext, &ssiPrinc,
 205                                          KRB5_PRINCIPAL_UNPARSE_NO_REALM, &ssi);
 206         if (*minor != 0)
 207             return GSS_S_FAILURE;
 208
 209         nameBuf.value = ssi;
 210         nameBuf.length = strlen(ssi);
 211
 212         major = gssEapRadiusAddAvp(minor, rh, vps,
 213                                    PW_GSS_ACCEPTOR_SERVICE_SPECIFIC,
 214                                    VENDORPEC_UKERNA,
 215                                    &nameBuf);
 216
 217         if (GSS_ERROR(major)) {
 218             krb5_free_unparsed_name(krbContext, ssi);
 219             return major;
 220         }
 221         krb5_free_unparsed_name(krbContext, ssi);
 222     }
 223
 224     krbDataToGssBuffer(krb5_princ_realm(krbContext, krbPrinc), &nameBuf);
 225     if (nameBuf.length != 0) {
 226         /* Acceptor-Realm-Name */
 227         major = gssEapRadiusAddAvp(minor, rh, vps,
 228                                    PW_GSS_ACCEPTOR_REALM_NAME,
 229                                    VENDORPEC_UKERNA,
 230                                    &nameBuf);
 231         if (GSS_ERROR(major))
 232             return major;
 233     }
 234
 235     return GSS_S_COMPLETE;
 236 }
 237
 238 static OM_uint32
 239 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
 240                            gss_ctx_id_t ctx,
 241                            gss_cred_id_t cred,
 242                            gss_buffer_t inputToken,
 243                            gss_channel_bindings_t chanBindings,
 244                            gss_buffer_t outputToken)
 245 {
 246     OM_uint32 major, tmpMinor;
 247     struct rs_handle *rh;
 248     struct rs_connection *rconn;
 249     struct rs_request *request = NULL;
 250     struct rs_packet *req = NULL, *resp = NULL;
 251     struct radius_packet *frreq, *frresp;
 252     int sendAcceptorIdentity = 0;
 253
 254     if (ctx->acceptorCtx.radHandle == NULL) {
 255         /* May be NULL from an imported partial context */
 256         major = gssEapRadiusAllocConn(minor, cred, ctx);
 257         if (GSS_ERROR(major))
 258             goto cleanup;
 259
 260         sendAcceptorIdentity = 1;
 261     }
 262
 263     rh = ctx->acceptorCtx.radHandle;
 264     rconn = ctx->acceptorCtx.radConn;
 265
 266     if (rs_packet_create_acc_request(rconn, &req, NULL, NULL) != 0) {
 267         major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
 268         goto cleanup;
 269     }
 270     frreq = rs_packet_frpkt(req);
 271
 272     if (sendAcceptorIdentity) {
 273         major = setAcceptorIdentity(minor, ctx, &frreq->vps);
 274         if (GSS_ERROR(major))
 275             goto cleanup;
 276     }
 277
 278     major = gssEapRadiusAddAvp(minor, rh, &frreq->vps,
 279                                PW_EAP_MESSAGE, 0, inputToken);
 280     if (GSS_ERROR(major))
 281         goto cleanup;
 282
 283     if (ctx->acceptorCtx.state.length != 0) {
 284         major = gssEapRadiusAddAvp(minor, rh, &frreq->vps, PW_STATE, 0,
 285                                    &ctx->acceptorCtx.state);
 286         if (GSS_ERROR(major))
 287             goto cleanup;
 288
 289         gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
 290     }
 291
 292     if (rs_request_create(rconn, &request) != 0 ||
 293         rs_request_send(request, req, &resp) != 0) {
 294         major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
 295         goto cleanup;
 296     }
 297
 298     assert(resp != NULL);
 299
 300     frresp = rs_packet_frpkt(resp);
 301     switch (frresp->code) {
 302     case PW_AUTHENTICATION_ACK:
 303     case PW_ACCESS_CHALLENGE:
 304         major = GSS_S_CONTINUE_NEEDED;
 305         break;
 306     case PW_AUTHENTICATION_REJECT:
 307         major = GSS_S_DEFECTIVE_CREDENTIAL;
 308         goto cleanup;
 309         break;
 310     default:
 311         major = GSS_S_FAILURE;
 312         goto cleanup;
 313         break;
 314     }
 315
 316     major = gssEapRadiusGetAvp(minor, frresp->vps, PW_EAP_MESSAGE, 0,
 317                                outputToken, TRUE);
 318     if ((major == GSS_S_UNAVAILABLE && frresp->code != PW_AUTHENTICATION_ACK) ||
 319         GSS_ERROR(major))
 320         goto cleanup;
 321
 322     if (frresp->code == PW_ACCESS_CHALLENGE) {
 323         major = gssEapRadiusGetAvp(minor, frresp->vps, PW_STATE, 0,
 324                                    &ctx->acceptorCtx.state, TRUE);
 325         if (major != GSS_S_UNAVAILABLE && GSS_ERROR(major))
 326             goto cleanup;
 327     } else {
 328         ctx->acceptorCtx.vps = frresp->vps;
 329         frresp->vps = NULL;
 330
 331         rs_conn_destroy(ctx->acceptorCtx.radConn);
 332         ctx->acceptorCtx.radConn = NULL;
 333
 334         major = acceptReadyEap(minor, ctx, cred);
 335         if (GSS_ERROR(major))
 336             goto cleanup;
 337
 338         ctx->state = EAP_STATE_EXTENSIONS_REQ;
 339     }
 340
 341     major = GSS_S_CONTINUE_NEEDED;
 342
 343 cleanup:
 344     rs_request_destroy(request);
 345
 346     return major;
 347 }
 348
 349 static OM_uint32
 350 acceptGssChannelBindings(OM_uint32 *minor,
 351                          gss_ctx_id_t ctx,
 352                          gss_cred_id_t cred,
 353                          gss_buffer_t inputToken,
 354                          gss_channel_bindings_t chanBindings)
 355 {
 356     OM_uint32 major, tmpMinor;
 357     gss_iov_buffer_desc iov[2];
 358
 359     iov[0].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;
 360     iov[0].buffer.length = 0;
 361     iov[0].buffer.value = NULL;
 362
 363     iov[1].type = GSS_IOV_BUFFER_TYPE_STREAM;
 364     iov[1].buffer = *inputToken;
 365
 366     major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
 367                                     iov, 2, TOK_TYPE_WRAP);
 368     if (GSS_ERROR(major))
 369         return major;
 370
 371     if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS &&
 372         !bufferEqual(&iov[0].buffer, &chanBindings->application_data)) {
 373         major = GSS_S_BAD_BINDINGS;
 374     } else {
 375         major = GSS_S_CONTINUE_NEEDED;
 376     }
 377
 378     gss_release_buffer(&tmpMinor, &iov[0].buffer);
 379
 380     return major;
 381 }
 382
 383 static OM_uint32
 384 eapGssSmAcceptExtensionsReq(OM_uint32 *minor,
 385                             gss_ctx_id_t ctx,
 386                             gss_cred_id_t cred,
 387                             gss_buffer_t inputToken,
 388                             gss_channel_bindings_t chanBindings,
 389                             gss_buffer_t outputToken)
 390 {
 391     OM_uint32 major;
 392
 393     outputToken->length = 0;
 394     outputToken->value = NULL;
 395
 396     major = acceptGssChannelBindings(minor, ctx, cred, inputToken,
 397                                      chanBindings);
 398     if (GSS_ERROR(major))
 399         return major;
 400
 401     ctx->state = EAP_STATE_EXTENSIONS_RESP;
 402
 403     return GSS_S_CONTINUE_NEEDED;
 404 }
 405
 406 static OM_uint32
 407 eapGssSmAcceptExtensionsResp(OM_uint32 *minor,
 408                              gss_ctx_id_t ctx,
 409                              gss_cred_id_t cred,
 410                              gss_buffer_t inputToken,
 411                              gss_channel_bindings_t chanBindings,
 412                              gss_buffer_t outputToken)
 413 {
 414     OM_uint32 major, tmpMinor;
 415     gss_buffer_desc credsToken = GSS_C_EMPTY_BUFFER;
 416
 417 #ifdef GSSEAP_ENABLE_REAUTH
 418     /*
 419      * If we're built with fast reauthentication enabled, then
 420      * fabricate a ticket from the initiator to ourselves.
 421      * Otherwise return an empty token.
 422      */
 423     major = gssEapMakeReauthCreds(minor, ctx, cred, &credsToken);
 424     if (GSS_ERROR(major))
 425         return major;
 426 #else
 427     credsToken.value = "";
 428 #endif /* GSSEAP_ENABLE_REAUTH */
 429
 430     major = duplicateBuffer(minor, &credsToken, outputToken);
 431     if (GSS_ERROR(major)) {
 432         gss_release_buffer(&tmpMinor, &credsToken);
 433         return major;
 434     }
 435
 436 #ifdef GSSEAP_ENABLE_REAUTH
 437     gss_release_buffer(&tmpMinor, &credsToken);
 438 #endif
 439
 440     ctx->state = EAP_STATE_ESTABLISHED;
 441
 442     return GSS_S_COMPLETE;
 443 }
 444
 445 static OM_uint32
 446 eapGssSmAcceptEstablished(OM_uint32 *minor,
 447                           gss_ctx_id_t ctx,
 448                           gss_cred_id_t cred,
 449                           gss_buffer_t inputToken,
 450                           gss_channel_bindings_t chanBindings,
 451                           gss_buffer_t outputToken)
 452 {
 453     /* Called with already established context */
 454     *minor = EINVAL;
 455     return GSS_S_BAD_STATUS;
 456 }
 457
 458 static struct gss_eap_acceptor_sm {
 459     enum gss_eap_token_type inputTokenType;
 460     enum gss_eap_token_type outputTokenType;
 461     OM_uint32 (*processToken)(OM_uint32 *,
 462                               gss_ctx_id_t,
 463                               gss_cred_id_t,
 464                               gss_buffer_t,
 465                               gss_channel_bindings_t,
 466                               gss_buffer_t);
 467 } eapGssAcceptorSm[] = {
 468     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,    eapGssSmAcceptIdentity           },
 469     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,    eapGssSmAcceptAuthenticate       },
 470     { TOK_TYPE_EXT_REQ,     TOK_TYPE_NONE,       eapGssSmAcceptExtensionsReq      },
 471     { TOK_TYPE_NONE,        TOK_TYPE_EXT_RESP,   eapGssSmAcceptExtensionsResp     },
 472     { TOK_TYPE_NONE,        TOK_TYPE_NONE,       eapGssSmAcceptEstablished        },
 473 #ifdef GSSEAP_ENABLE_REAUTH
 474     { TOK_TYPE_GSS_REAUTH,  TOK_TYPE_GSS_REAUTH, eapGssSmAcceptGssReauth          },
 475 #endif
 476 };
 477
 478 OM_uint32
 479 gss_accept_sec_context(OM_uint32 *minor,
 480                        gss_ctx_id_t *context_handle,
 481                        gss_cred_id_t cred,
 482                        gss_buffer_t input_token,
 483                        gss_channel_bindings_t input_chan_bindings,
 484                        gss_name_t *src_name,
 485                        gss_OID *mech_type,
 486                        gss_buffer_t output_token,
 487                        OM_uint32 *ret_flags,
 488                        OM_uint32 *time_rec,
 489                        gss_cred_id_t *delegated_cred_handle)
 490 {
 491     OM_uint32 major;
 492     OM_uint32 tmpMajor, tmpMinor;
 493     gss_ctx_id_t ctx = *context_handle;
 494     struct gss_eap_acceptor_sm *sm = NULL;
 495     gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
 496     gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
 497     enum gss_eap_token_type tokType;
 498     int initialContextToken = 0;
 499
 500     *minor = 0;
 501
 502     output_token->length = 0;
 503     output_token->value = NULL;
 504
 505     if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
 506         return GSS_S_DEFECTIVE_TOKEN;
 507     }
 508
 509     if (ctx == GSS_C_NO_CONTEXT) {
 510         major = gssEapAllocContext(minor, &ctx);
 511         if (GSS_ERROR(major))
 512             return major;
 513
 514         initialContextToken = 1;
 515         *context_handle = ctx;
 516     }
 517
 518     GSSEAP_MUTEX_LOCK(&ctx->mutex);
 519
 520     /* Validate and lock credentials */
 521     if (cred != GSS_C_NO_CREDENTIAL) {
 522         GSSEAP_MUTEX_LOCK(&cred->mutex);
 523
 524         if ((cred->flags & CRED_FLAG_ACCEPT) == 0) {
 525             major = GSS_S_NO_CRED;
 526             goto cleanup;
 527         }
 528     }
 529
 530     sm = &eapGssAcceptorSm[ctx->state];
 531
 532     major = gssEapVerifyToken(minor, ctx, input_token,
 533                               &tokType, &innerInputToken);
 534     if (GSS_ERROR(major))
 535         goto cleanup;
 536
 537     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 538         major = GSS_S_BAD_MECH;
 539         goto cleanup;
 540     }
 541
 542 #ifdef GSSEAP_ENABLE_REAUTH
 543     /*
 544      * If we're built with fast reauthentication support, it's valid
 545      * for an initiator to send a GSS reauthentication token as its
 546      * initial context token, causing us to short-circuit the state
 547      * machine and process Kerberos GSS messages instead.
 548      */
 549     if (tokType == TOK_TYPE_GSS_REAUTH && initialContextToken) {
 550         ctx->state = EAP_STATE_KRB_REAUTH_GSS;
 551     } else
 552 #endif
 553     if (tokType != sm->inputTokenType) {
 554         major = GSS_S_DEFECTIVE_TOKEN;
 555         goto cleanup;
 556     }
 557
 558     do {
 559         sm = &eapGssAcceptorSm[ctx->state];
 560
 561         major = (sm->processToken)(minor,
 562                                    ctx,
 563                                    cred,
 564                                    &innerInputToken,
 565                                    input_chan_bindings,
 566                                    &innerOutputToken);
 567         if (GSS_ERROR(major))
 568             goto cleanup;
 569     } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
 570
 571     if (mech_type != NULL) {
 572         if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
 573             duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
 574     }
 575     if (innerOutputToken.value != NULL) {
 576         tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
 577                                    sm->outputTokenType, output_token);
 578         if (GSS_ERROR(tmpMajor)) {
 579             major = tmpMajor;
 580             *minor = tmpMinor;
 581             goto cleanup;
 582         }
 583     }
 584     if (ret_flags != NULL)
 585         *ret_flags = ctx->gssFlags;
 586     if (delegated_cred_handle != NULL)
 587         *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 588
 589     if (major == GSS_S_COMPLETE) {
 590         if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
 591             major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
 592             if (GSS_ERROR(major))
 593                 goto cleanup;
 594         }
 595         if (time_rec != NULL)
 596             gssEapContextTime(&tmpMinor, ctx, time_rec);
 597     }
 598
 599     assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
 600
 601 cleanup:
 602     if (cred != GSS_C_NO_CREDENTIAL)
 603         GSSEAP_MUTEX_UNLOCK(&cred->mutex);
 604     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
 605
 606     if (GSS_ERROR(major))
 607         gssEapReleaseContext(&tmpMinor, context_handle);
 608
 609     gss_release_buffer(&tmpMinor, &innerOutputToken);
 610
 611     return major;
 612 }
 613
 614 #ifdef GSSEAP_ENABLE_REAUTH
 615 static OM_uint32
 616 acceptReadyKrb(OM_uint32 *minor,
 617                gss_ctx_id_t ctx,
 618                gss_cred_id_t cred,
 619                const gss_name_t initiator,
 620                const gss_OID mech,
 621                OM_uint32 timeRec)
 622 {
 623     OM_uint32 major;
 624
 625     major = gssEapGlueToMechName(minor, initiator, &ctx->initiatorName);
 626     if (GSS_ERROR(major))
 627         return major;
 628
 629     if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
 630         major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
 631         if (GSS_ERROR(major))
 632             return major;
 633     }
 634
 635     major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
 636     if (GSS_ERROR(major))
 637         return major;
 638
 639     ctx->state = EAP_STATE_ESTABLISHED;
 640
 641     return GSS_S_COMPLETE;
 642 }
 643
 644 static OM_uint32
 645 eapGssSmAcceptGssReauth(OM_uint32 *minor,
 646                         gss_ctx_id_t ctx,
 647                         gss_cred_id_t cred,
 648                         gss_buffer_t inputToken,
 649                         gss_channel_bindings_t chanBindings,
 650                         gss_buffer_t outputToken)
 651 {
 652     OM_uint32 major, tmpMinor;
 653     gss_cred_id_t krbCred = GSS_C_NO_CREDENTIAL;
 654     gss_name_t krbInitiator = GSS_C_NO_NAME;
 655     gss_OID mech = GSS_C_NO_OID;
 656     OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
 657
 658     ctx->flags |= CTX_FLAG_KRB_REAUTH_GSS;
 659
 660     if (cred != GSS_C_NO_CREDENTIAL)
 661         krbCred = cred->krbCred;
 662
 663     major = gssAcceptSecContext(minor,
 664                                 &ctx->kerberosCtx,
 665                                 krbCred,
 666                                 inputToken,
 667                                 chanBindings,
 668                                 &krbInitiator,
 669                                 &mech,
 670                                 outputToken,
 671                                 &gssFlags,
 672                                 &timeRec,
 673                                 NULL);
 674     if (major == GSS_S_COMPLETE) {
 675         major = acceptReadyKrb(minor, ctx, cred,
 676                                krbInitiator, mech, timeRec);
 677     }
 678
 679     ctx->gssFlags = gssFlags;
 680
 681     gssReleaseName(&tmpMinor, &krbInitiator);
 682
 683     return major;
 684 }
 685 #endif /* GSSEAP_ENABLE_REAUTH */