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, 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, 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, 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, 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 createRadiusHandle(OM_uint32 *minor,
 240                    gss_cred_id_t cred,
 241                    gss_ctx_id_t ctx)
 242 {
 243     struct gss_eap_acceptor_ctx *actx = &ctx->acceptorCtx;
 244     const char *configFile = RS_CONFIG_FILE;
 245     const char *configStanza = "gss-eap";
 246     struct rs_alloc_scheme ralloc;
 247     struct rs_error *err;
 248
 249     assert(actx->radHandle == NULL);
 250     assert(actx->radConn == NULL);
 251
 252     if (rs_context_create(&actx->radHandle, RS_DICT_FILE) != 0)
 253         return GSS_S_FAILURE;
 254
 255     if (cred != GSS_C_NO_CREDENTIAL) {
 256         if (cred->radiusConfigFile != NULL)
 257             configFile = cred->radiusConfigFile;
 258         if (cred->radiusConfigStanza != NULL)
 259             configStanza = cred->radiusConfigStanza;
 260     }
 261
 262     ralloc.calloc  = GSSEAP_CALLOC;
 263     ralloc.malloc  = GSSEAP_MALLOC;
 264     ralloc.free    = GSSEAP_FREE;
 265     ralloc.realloc = GSSEAP_REALLOC;
 266
 267     rs_context_set_alloc_scheme(actx->radHandle, &ralloc);
 268
 269     if (rs_context_read_config(actx->radHandle, configFile) != 0) {
 270         err = rs_err_ctx_pop(actx->radHandle);
 271         goto fail;
 272     }
 273
 274     if (rs_conn_create(actx->radHandle, &actx->radConn, configStanza) != 0) {
 275         err = rs_err_conn_pop(actx->radConn);
 276         goto fail;
 277     }
 278
 279     /* XXX TODO rs_conn_select_server does not exist yet */
 280 #if 0
 281     if (actx->radServer != NULL) {
 282         if (rs_conn_select_server(actx->radConn, actx->radServer) != 0) {
 283             err = rs_err_conn_pop(actx->radConn);
 284             goto fail;
 285         }
 286     }
 287 #endif
 288
 289     *minor = 0;
 290     return GSS_S_COMPLETE;
 291
 292 fail:
 293     return gssEapRadiusMapError(minor, err);
 294 }
 295
 296 static OM_uint32
 297 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
 298                            gss_ctx_id_t ctx,
 299                            gss_cred_id_t cred,
 300                            gss_buffer_t inputToken,
 301                            gss_channel_bindings_t chanBindings,
 302                            gss_buffer_t outputToken)
 303 {
 304     OM_uint32 major, tmpMinor;
 305     struct rs_handle *rh;
 306     struct rs_connection *rconn;
 307     struct rs_request *request = NULL;
 308     struct rs_packet *req = NULL, *resp = NULL;
 309     struct radius_packet *frreq, *frresp;
 310     int sendAcceptorIdentity = 0;
 311
 312     if (ctx->acceptorCtx.radHandle == NULL) {
 313         /* May be NULL from an imported partial context */
 314         major = createRadiusHandle(minor, cred, ctx);
 315         if (GSS_ERROR(major))
 316             goto cleanup;
 317
 318         sendAcceptorIdentity = 1;
 319     }
 320
 321     rh = ctx->acceptorCtx.radHandle;
 322     rconn = ctx->acceptorCtx.radConn;
 323
 324     if (rs_packet_create_acc_request(rconn, &req, NULL, NULL) != 0) {
 325         major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
 326         goto cleanup;
 327     }
 328     frreq = rs_packet_frpkt(req);
 329
 330     if (sendAcceptorIdentity) {
 331         major = setAcceptorIdentity(minor, ctx, &frreq->vps);
 332         if (GSS_ERROR(major))
 333             goto cleanup;
 334     }
 335
 336     major = gssEapRadiusAddAvp(minor, &frreq->vps,
 337                                PW_EAP_MESSAGE, 0, inputToken);
 338     if (GSS_ERROR(major))
 339         goto cleanup;
 340
 341     if (ctx->acceptorCtx.state.length != 0) {
 342         major = gssEapRadiusAddAvp(minor, &frreq->vps, PW_STATE, 0,
 343                                    &ctx->acceptorCtx.state);
 344         if (GSS_ERROR(major))
 345             goto cleanup;
 346
 347         gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
 348     }
 349
 350     if (rs_request_create(rconn, &request) != 0 ||
 351         rs_request_send(request, req, &resp) != 0) {
 352         major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
 353         goto cleanup;
 354     }
 355
 356     assert(resp != NULL);
 357
 358     frresp = rs_packet_frpkt(resp);
 359     switch (frresp->code) {
 360     case PW_AUTHENTICATION_ACK:
 361     case PW_ACCESS_CHALLENGE:
 362         major = GSS_S_CONTINUE_NEEDED;
 363         break;
 364     case PW_AUTHENTICATION_REJECT:
 365         major = GSS_S_DEFECTIVE_CREDENTIAL;
 366         goto cleanup;
 367         break;
 368     default:
 369         major = GSS_S_FAILURE;
 370         goto cleanup;
 371         break;
 372     }
 373
 374     major = gssEapRadiusGetAvp(minor, frresp->vps, PW_EAP_MESSAGE, 0,
 375                                outputToken, TRUE);
 376     if ((major == GSS_S_UNAVAILABLE && frresp->code != PW_AUTHENTICATION_ACK) ||
 377         GSS_ERROR(major))
 378         goto cleanup;
 379
 380     if (frresp->code == PW_ACCESS_CHALLENGE) {
 381         major = gssEapRadiusGetAvp(minor, frresp->vps, PW_STATE, 0,
 382                                    &ctx->acceptorCtx.state, TRUE);
 383         if (major != GSS_S_UNAVAILABLE && GSS_ERROR(major))
 384             goto cleanup;
 385     } else {
 386         ctx->acceptorCtx.vps = frresp->vps;
 387         frresp->vps = NULL;
 388
 389         rs_conn_destroy(ctx->acceptorCtx.radConn);
 390         ctx->acceptorCtx.radConn = NULL;
 391
 392         major = acceptReadyEap(minor, ctx, cred);
 393         if (GSS_ERROR(major))
 394             goto cleanup;
 395
 396         ctx->state = EAP_STATE_EXTENSIONS_REQ;
 397     }
 398
 399     major = GSS_S_CONTINUE_NEEDED;
 400
 401 cleanup:
 402     rs_request_destroy(request);
 403
 404     return major;
 405 }
 406
 407 static OM_uint32
 408 eapGssSmAcceptExtensionsReq(OM_uint32 *minor,
 409                             gss_ctx_id_t ctx,
 410                             gss_cred_id_t cred,
 411                             gss_buffer_t inputToken,
 412                             gss_channel_bindings_t chanBindings,
 413                             gss_buffer_t outputToken)
 414 {
 415     OM_uint32 major;
 416
 417     major = gssEapVerifyExtensions(minor, cred, ctx, chanBindings, inputToken);
 418     if (GSS_ERROR(major))
 419         return major;
 420
 421     outputToken->length = 0;
 422     outputToken->value = NULL;
 423
 424     ctx->state = EAP_STATE_EXTENSIONS_RESP;
 425
 426     return GSS_S_CONTINUE_NEEDED;
 427 }
 428
 429 static OM_uint32
 430 eapGssSmAcceptExtensionsResp(OM_uint32 *minor,
 431                              gss_ctx_id_t ctx,
 432                              gss_cred_id_t cred,
 433                              gss_buffer_t inputToken,
 434                              gss_channel_bindings_t chanBindings,
 435                              gss_buffer_t outputToken)
 436 {
 437     OM_uint32 major;
 438
 439     major = gssEapMakeExtensions(minor, cred, ctx, chanBindings, outputToken);
 440     if (GSS_ERROR(major))
 441         return major;
 442
 443     ctx->state = EAP_STATE_ESTABLISHED;
 444
 445     return GSS_S_COMPLETE;
 446 }
 447
 448 static OM_uint32
 449 eapGssSmAcceptEstablished(OM_uint32 *minor,
 450                           gss_ctx_id_t ctx,
 451                           gss_cred_id_t cred,
 452                           gss_buffer_t inputToken,
 453                           gss_channel_bindings_t chanBindings,
 454                           gss_buffer_t outputToken)
 455 {
 456     /* Called with already established context */
 457     *minor = EINVAL;
 458     return GSS_S_BAD_STATUS;
 459 }
 460
 461 static struct gss_eap_acceptor_sm {
 462     enum gss_eap_token_type inputTokenType;
 463     enum gss_eap_token_type outputTokenType;
 464     OM_uint32 (*processToken)(OM_uint32 *,
 465                               gss_ctx_id_t,
 466                               gss_cred_id_t,
 467                               gss_buffer_t,
 468                               gss_channel_bindings_t,
 469                               gss_buffer_t);
 470 } eapGssAcceptorSm[] = {
 471     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,    eapGssSmAcceptIdentity           },
 472     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,    eapGssSmAcceptAuthenticate       },
 473     { TOK_TYPE_EXT_REQ,     TOK_TYPE_NONE,       eapGssSmAcceptExtensionsReq      },
 474     { TOK_TYPE_NONE,        TOK_TYPE_EXT_RESP,   eapGssSmAcceptExtensionsResp     },
 475     { TOK_TYPE_NONE,        TOK_TYPE_NONE,       eapGssSmAcceptEstablished        },
 476 #ifdef GSSEAP_ENABLE_REAUTH
 477     { TOK_TYPE_GSS_REAUTH,  TOK_TYPE_GSS_REAUTH, eapGssSmAcceptGssReauth          },
 478 #endif
 479 };
 480
 481 OM_uint32
 482 gss_accept_sec_context(OM_uint32 *minor,
 483                        gss_ctx_id_t *context_handle,
 484                        gss_cred_id_t cred,
 485                        gss_buffer_t input_token,
 486                        gss_channel_bindings_t input_chan_bindings,
 487                        gss_name_t *src_name,
 488                        gss_OID *mech_type,
 489                        gss_buffer_t output_token,
 490                        OM_uint32 *ret_flags,
 491                        OM_uint32 *time_rec,
 492                        gss_cred_id_t *delegated_cred_handle)
 493 {
 494     OM_uint32 major;
 495     OM_uint32 tmpMajor, tmpMinor;
 496     gss_ctx_id_t ctx = *context_handle;
 497     struct gss_eap_acceptor_sm *sm = NULL;
 498     gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
 499     gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
 500     enum gss_eap_token_type tokType;
 501     int initialContextToken = 0;
 502
 503     *minor = 0;
 504
 505     output_token->length = 0;
 506     output_token->value = NULL;
 507
 508     if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
 509         return GSS_S_DEFECTIVE_TOKEN;
 510     }
 511
 512     if (ctx == GSS_C_NO_CONTEXT) {
 513         major = gssEapAllocContext(minor, &ctx);
 514         if (GSS_ERROR(major))
 515             return major;
 516
 517         initialContextToken = 1;
 518         *context_handle = ctx;
 519     }
 520
 521     GSSEAP_MUTEX_LOCK(&ctx->mutex);
 522
 523     /* Validate and lock credentials */
 524     if (cred != GSS_C_NO_CREDENTIAL) {
 525         GSSEAP_MUTEX_LOCK(&cred->mutex);
 526
 527         if ((cred->flags & CRED_FLAG_ACCEPT) == 0) {
 528             major = GSS_S_NO_CRED;
 529             goto cleanup;
 530         }
 531     }
 532
 533     sm = &eapGssAcceptorSm[ctx->state];
 534
 535     major = gssEapVerifyToken(minor, ctx, input_token,
 536                               &tokType, &innerInputToken);
 537     if (GSS_ERROR(major))
 538         goto cleanup;
 539
 540     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 541         major = GSS_S_BAD_MECH;
 542         goto cleanup;
 543     }
 544
 545 #ifdef GSSEAP_ENABLE_REAUTH
 546     /*
 547      * If we're built with fast reauthentication support, it's valid
 548      * for an initiator to send a GSS reauthentication token as its
 549      * initial context token, causing us to short-circuit the state
 550      * machine and process Kerberos GSS messages instead.
 551      */
 552     if (tokType == TOK_TYPE_GSS_REAUTH && initialContextToken) {
 553         ctx->state = EAP_STATE_KRB_REAUTH_GSS;
 554     } else
 555 #endif
 556     if (tokType != sm->inputTokenType) {
 557         major = GSS_S_DEFECTIVE_TOKEN;
 558         goto cleanup;
 559     }
 560
 561     do {
 562         sm = &eapGssAcceptorSm[ctx->state];
 563
 564         major = (sm->processToken)(minor,
 565                                    ctx,
 566                                    cred,
 567                                    &innerInputToken,
 568                                    input_chan_bindings,
 569                                    &innerOutputToken);
 570         if (GSS_ERROR(major))
 571             goto cleanup;
 572     } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
 573
 574     if (mech_type != NULL) {
 575         if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
 576             duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
 577     }
 578     if (innerOutputToken.value != NULL) {
 579         tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
 580                                    sm->outputTokenType, output_token);
 581         if (GSS_ERROR(tmpMajor)) {
 582             major = tmpMajor;
 583             *minor = tmpMinor;
 584             goto cleanup;
 585         }
 586     }
 587     if (ret_flags != NULL)
 588         *ret_flags = ctx->gssFlags;
 589     if (delegated_cred_handle != NULL)
 590         *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 591
 592     if (major == GSS_S_COMPLETE) {
 593         if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
 594             major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
 595             if (GSS_ERROR(major))
 596                 goto cleanup;
 597         }
 598         if (time_rec != NULL)
 599             gssEapContextTime(&tmpMinor, ctx, time_rec);
 600     }
 601
 602     assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
 603
 604 cleanup:
 605     if (cred != GSS_C_NO_CREDENTIAL)
 606         GSSEAP_MUTEX_UNLOCK(&cred->mutex);
 607     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
 608
 609     if (GSS_ERROR(major))
 610         gssEapReleaseContext(&tmpMinor, context_handle);
 611
 612     gss_release_buffer(&tmpMinor, &innerOutputToken);
 613
 614     return major;
 615 }
 616
 617 #ifdef GSSEAP_ENABLE_REAUTH
 618 static OM_uint32
 619 acceptReadyKrb(OM_uint32 *minor,
 620                gss_ctx_id_t ctx,
 621                gss_cred_id_t cred,
 622                const gss_name_t initiator,
 623                const gss_OID mech,
 624                OM_uint32 timeRec)
 625 {
 626     OM_uint32 major;
 627
 628     major = gssEapGlueToMechName(minor, initiator, &ctx->initiatorName);
 629     if (GSS_ERROR(major))
 630         return major;
 631
 632     if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
 633         major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
 634         if (GSS_ERROR(major))
 635             return major;
 636     }
 637
 638     major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
 639     if (GSS_ERROR(major))
 640         return major;
 641
 642     ctx->state = EAP_STATE_ESTABLISHED;
 643
 644     return GSS_S_COMPLETE;
 645 }
 646
 647 static OM_uint32
 648 eapGssSmAcceptGssReauth(OM_uint32 *minor,
 649                         gss_ctx_id_t ctx,
 650                         gss_cred_id_t cred,
 651                         gss_buffer_t inputToken,
 652                         gss_channel_bindings_t chanBindings,
 653                         gss_buffer_t outputToken)
 654 {
 655     OM_uint32 major, tmpMinor;
 656     gss_cred_id_t krbCred = GSS_C_NO_CREDENTIAL;
 657     gss_name_t krbInitiator = GSS_C_NO_NAME;
 658     gss_OID mech = GSS_C_NO_OID;
 659     OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
 660
 661     ctx->flags |= CTX_FLAG_KRB_REAUTH_GSS;
 662
 663     if (cred != GSS_C_NO_CREDENTIAL)
 664         krbCred = cred->krbCred;
 665
 666     major = gssAcceptSecContext(minor,
 667                                 &ctx->kerberosCtx,
 668                                 krbCred,
 669                                 inputToken,
 670                                 chanBindings,
 671                                 &krbInitiator,
 672                                 &mech,
 673                                 outputToken,
 674                                 &gssFlags,
 675                                 &timeRec,
 676                                 NULL);
 677     if (major == GSS_S_COMPLETE) {
 678         major = acceptReadyKrb(minor, ctx, cred,
 679                                krbInitiator, mech, timeRec);
 680     }
 681
 682     ctx->gssFlags = gssFlags;
 683
 684     gssReleaseName(&tmpMinor, &krbInitiator);
 685
 686     return major;
 687 }
 688 #endif /* GSSEAP_ENABLE_REAUTH */