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     ctx->initiatorName->attrCtx = gssEapCreateAttrContext(cred, ctx);
  78
  79     major = gssEapRadiusGetRawAvp(minor, ctx->acceptorCtx.vps,
  80                                   PW_MS_MPPE_SEND_KEY, VENDORPEC_MS, &vp);
  81     if (major == GSS_S_COMPLETE && ctx->encryptionType != ENCTYPE_NULL) {
  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     } else {
  95         /*
  96          * draft-howlett-eap-gss says that integrity/confidentialty should
  97          * always be advertised as available, but if we have no keying
  98          * material it seems confusing to the caller to advertise this.
  99          */
 100         ctx->gssFlags &= ~(GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
 101         ctx->encryptionType = ENCTYPE_NULL;
 102     }
 103
 104     major = sequenceInit(minor,
 105                          &ctx->seqState, ctx->recvSeq,
 106                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
 107                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
 108                          TRUE);
 109     if (GSS_ERROR(major))
 110         return major;
 111
 112     return GSS_S_COMPLETE;
 113 }
 114
 115 static OM_uint32
 116 eapGssSmAcceptIdentity(OM_uint32 *minor,
 117                        gss_ctx_id_t ctx,
 118                        gss_cred_id_t cred,
 119                        gss_buffer_t inputToken,
 120                        gss_channel_bindings_t chanBindings,
 121                        gss_buffer_t outputToken)
 122 {
 123     OM_uint32 major;
 124     union {
 125         struct eap_hdr pdu;
 126         unsigned char data[5];
 127     } pkt;
 128     gss_buffer_desc pktBuffer;
 129
 130     if (inputToken != GSS_C_NO_BUFFER && inputToken->length != 0)
 131         return GSS_S_DEFECTIVE_TOKEN;
 132
 133     assert(ctx->acceptorName == GSS_C_NO_NAME);
 134
 135     if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
 136         major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
 137         if (GSS_ERROR(major))
 138             return major;
 139     }
 140
 141     pkt.pdu.code = EAP_CODE_REQUEST;
 142     pkt.pdu.identifier = 0;
 143     pkt.pdu.length = htons(sizeof(pkt.data));
 144     pkt.data[4] = EAP_TYPE_IDENTITY;
 145
 146     pktBuffer.length = sizeof(pkt.data);
 147     pktBuffer.value = pkt.data;
 148
 149     major = duplicateBuffer(minor, &pktBuffer, outputToken);
 150     if (GSS_ERROR(major))
 151         return major;
 152
 153     ctx->state = EAP_STATE_AUTHENTICATE;
 154
 155     return GSS_S_CONTINUE_NEEDED;
 156 }
 157
 158 static OM_uint32
 159 setAcceptorIdentity(OM_uint32 *minor,
 160                     gss_ctx_id_t ctx,
 161                     VALUE_PAIR **vps)
 162 {
 163     OM_uint32 major;
 164     gss_buffer_desc nameBuf;
 165     krb5_context krbContext = NULL;
 166     krb5_principal krbPrinc;
 167     struct rs_handle *rh = ctx->acceptorCtx.radHandle;
 168
 169     assert(rh != NULL);
 170
 171     /* Awaits further specification */
 172     if (ctx->acceptorName == GSS_C_NO_NAME)
 173         return GSS_S_COMPLETE;
 174
 175     GSSEAP_KRB_INIT(&krbContext);
 176
 177     krbPrinc = ctx->acceptorName->krbPrincipal;
 178     assert(krbPrinc != NULL);
 179
 180     if (krb5_princ_size(krbContext, krbPrinc) < 2)
 181         return GSS_S_BAD_NAME;
 182
 183     /* Acceptor-Service-Name */
 184     krbDataToGssBuffer(krb5_princ_component(krbContext, krbPrinc, 0), &nameBuf);
 185
 186     major = gssEapRadiusAddAvp(minor, rh, vps,
 187                                PW_GSS_ACCEPTOR_SERVICE_NAME,
 188                                VENDORPEC_UKERNA,
 189                                &nameBuf);
 190     if (GSS_ERROR(major))
 191         return major;
 192
 193     /* Acceptor-Host-Name */
 194     krbDataToGssBuffer(krb5_princ_component(krbContext, krbPrinc, 1), &nameBuf);
 195
 196     major = gssEapRadiusAddAvp(minor, rh, vps,
 197                                PW_GSS_ACCEPTOR_HOST_NAME,
 198                                VENDORPEC_UKERNA,
 199                                &nameBuf);
 200     if (GSS_ERROR(major))
 201         return major;
 202
 203     if (krb5_princ_size(krbContext, krbPrinc) > 2) {
 204         /* Acceptor-Service-Specific */
 205         krb5_principal_data ssiPrinc = *krbPrinc;
 206         char *ssi;
 207
 208         krb5_princ_size(krbContext, &ssiPrinc) -= 2;
 209         krb5_princ_name(krbContext, &ssiPrinc) += 2;
 210
 211         *minor = krb5_unparse_name_flags(krbContext, &ssiPrinc,
 212                                          KRB5_PRINCIPAL_UNPARSE_NO_REALM, &ssi);
 213         if (*minor != 0)
 214             return GSS_S_FAILURE;
 215
 216         nameBuf.value = ssi;
 217         nameBuf.length = strlen(ssi);
 218
 219         major = gssEapRadiusAddAvp(minor, rh, vps,
 220                                    PW_GSS_ACCEPTOR_SERVICE_SPECIFIC,
 221                                    VENDORPEC_UKERNA,
 222                                    &nameBuf);
 223
 224         if (GSS_ERROR(major)) {
 225             krb5_free_unparsed_name(krbContext, ssi);
 226             return major;
 227         }
 228         krb5_free_unparsed_name(krbContext, ssi);
 229     }
 230
 231     krbDataToGssBuffer(krb5_princ_realm(krbContext, krbPrinc), &nameBuf);
 232     if (nameBuf.length != 0) {
 233         /* Acceptor-Realm-Name */
 234         major = gssEapRadiusAddAvp(minor, rh, vps,
 235                                    PW_GSS_ACCEPTOR_REALM_NAME,
 236                                    VENDORPEC_UKERNA,
 237                                    &nameBuf);
 238         if (GSS_ERROR(major))
 239             return major;
 240     }
 241
 242     return GSS_S_COMPLETE;
 243 }
 244
 245 static OM_uint32
 246 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
 247                            gss_ctx_id_t ctx,
 248                            gss_cred_id_t cred,
 249                            gss_buffer_t inputToken,
 250                            gss_channel_bindings_t chanBindings,
 251                            gss_buffer_t outputToken)
 252 {
 253     OM_uint32 major, tmpMinor;
 254     struct rs_handle *rh;
 255     struct rs_connection *rconn;
 256     struct rs_request *request = NULL;
 257     struct rs_packet *req = NULL, *resp = NULL;
 258     struct radius_packet *frreq, *frresp;
 259     int sendAcceptorIdentity = 0;
 260
 261     if (ctx->acceptorCtx.radHandle == NULL) {
 262         /* May be NULL from an imported partial context */
 263         major = gssEapRadiusAllocConn(minor, cred, ctx);
 264         if (GSS_ERROR(major))
 265             goto cleanup;
 266
 267         sendAcceptorIdentity = 1;
 268     }
 269
 270     rh = ctx->acceptorCtx.radHandle;
 271     rconn = ctx->acceptorCtx.radConn;
 272
 273     if (rs_packet_create_acc_request(rconn, &req, NULL, NULL) != 0) {
 274         major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
 275         goto cleanup;
 276     }
 277     frreq = rs_packet_frpkt(req);
 278
 279     if (sendAcceptorIdentity) {
 280         major = setAcceptorIdentity(minor, ctx, &frreq->vps);
 281         if (GSS_ERROR(major))
 282             goto cleanup;
 283     }
 284
 285     major = gssEapRadiusAddAvp(minor, rh, &frreq->vps,
 286                                PW_EAP_MESSAGE, 0, inputToken);
 287     if (GSS_ERROR(major))
 288         goto cleanup;
 289
 290     if (ctx->acceptorCtx.state.length != 0) {
 291         major = gssEapRadiusAddAvp(minor, rh, &frreq->vps, PW_STATE, 0,
 292                                    &ctx->acceptorCtx.state);
 293         if (GSS_ERROR(major))
 294             goto cleanup;
 295
 296         gss_release_buffer(&tmpMinor, &ctx->acceptorCtx.state);
 297     }
 298
 299     if (rs_request_create(rconn, &request) != 0 ||
 300         rs_request_send(request, req, &resp) != 0) {
 301         major = gssEapRadiusMapError(minor, rs_err_conn_pop(rconn));
 302         goto cleanup;
 303     }
 304
 305     assert(resp != NULL);
 306
 307     frresp = rs_packet_frpkt(resp);
 308     switch (frresp->code) {
 309     case PW_AUTHENTICATION_ACK:
 310     case PW_ACCESS_CHALLENGE:
 311         major = GSS_S_CONTINUE_NEEDED;
 312         break;
 313     case PW_AUTHENTICATION_REJECT:
 314         major = GSS_S_DEFECTIVE_CREDENTIAL;
 315         goto cleanup;
 316         break;
 317     default:
 318         major = GSS_S_FAILURE;
 319         goto cleanup;
 320         break;
 321     }
 322
 323     major = gssEapRadiusGetAvp(minor, frresp->vps, PW_EAP_MESSAGE, 0,
 324                                outputToken, TRUE);
 325     if ((major == GSS_S_UNAVAILABLE && frresp->code != PW_AUTHENTICATION_ACK) ||
 326         GSS_ERROR(major))
 327         goto cleanup;
 328
 329     if (frresp->code == PW_ACCESS_CHALLENGE) {
 330         major = gssEapRadiusGetAvp(minor, frresp->vps, PW_STATE, 0,
 331                                    &ctx->acceptorCtx.state, TRUE);
 332         if (major != GSS_S_UNAVAILABLE && GSS_ERROR(major))
 333             goto cleanup;
 334     } else {
 335         ctx->acceptorCtx.vps = frresp->vps;
 336         frresp->vps = NULL;
 337
 338         major = acceptReadyEap(minor, ctx, cred);
 339         if (GSS_ERROR(major))
 340             goto cleanup;
 341
 342         ctx->state = EAP_STATE_EXTENSIONS_REQ;
 343     }
 344
 345     major = GSS_S_CONTINUE_NEEDED;
 346
 347 cleanup:
 348     rs_request_destroy(request);
 349
 350     return major;
 351 }
 352
 353 static OM_uint32
 354 acceptGssChannelBindings(OM_uint32 *minor,
 355                          gss_ctx_id_t ctx,
 356                          gss_cred_id_t cred,
 357                          gss_buffer_t inputToken,
 358                          gss_channel_bindings_t chanBindings)
 359 {
 360     OM_uint32 major, tmpMinor;
 361     gss_iov_buffer_desc iov[2];
 362
 363     iov[0].type = GSS_IOV_BUFFER_TYPE_DATA | GSS_IOV_BUFFER_FLAG_ALLOCATE;
 364     iov[0].buffer.length = 0;
 365     iov[0].buffer.value = NULL;
 366
 367     iov[1].type = GSS_IOV_BUFFER_TYPE_STREAM;
 368     iov[1].buffer = *inputToken;
 369
 370     major = gssEapUnwrapOrVerifyMIC(minor, ctx, NULL, NULL,
 371                                     iov, 2, TOK_TYPE_WRAP);
 372     if (GSS_ERROR(major))
 373         return major;
 374
 375     if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS &&
 376         !bufferEqual(&iov[0].buffer, &chanBindings->application_data)) {
 377         major = GSS_S_BAD_BINDINGS;
 378     } else {
 379         major = GSS_S_CONTINUE_NEEDED;
 380     }
 381
 382     gss_release_buffer(&tmpMinor, &iov[0].buffer);
 383
 384     return major;
 385 }
 386
 387 static OM_uint32
 388 eapGssSmAcceptExtensionsReq(OM_uint32 *minor,
 389                             gss_ctx_id_t ctx,
 390                             gss_cred_id_t cred,
 391                             gss_buffer_t inputToken,
 392                             gss_channel_bindings_t chanBindings,
 393                             gss_buffer_t outputToken)
 394 {
 395     OM_uint32 major;
 396
 397     outputToken->length = 0;
 398     outputToken->value = NULL;
 399
 400     major = acceptGssChannelBindings(minor, ctx, cred, inputToken,
 401                                      chanBindings);
 402     if (GSS_ERROR(major))
 403         return major;
 404
 405     ctx->state = EAP_STATE_EXTENSIONS_RESP;
 406
 407     return GSS_S_CONTINUE_NEEDED;
 408 }
 409
 410 static OM_uint32
 411 eapGssSmAcceptExtensionsResp(OM_uint32 *minor,
 412                              gss_ctx_id_t ctx,
 413                              gss_cred_id_t cred,
 414                              gss_buffer_t inputToken,
 415                              gss_channel_bindings_t chanBindings,
 416                              gss_buffer_t outputToken)
 417 {
 418     OM_uint32 major, tmpMinor;
 419     gss_buffer_desc credsToken = GSS_C_EMPTY_BUFFER;
 420
 421 #ifdef GSSEAP_ENABLE_REAUTH
 422     /*
 423      * If we're built with fast reauthentication enabled, then
 424      * fabricate a ticket from the initiator to ourselves.
 425      * Otherwise return an empty token.
 426      */
 427     major = gssEapMakeReauthCreds(minor, ctx, cred, &credsToken);
 428     if (GSS_ERROR(major))
 429         return major;
 430 #else
 431     credsToken.value = "";
 432 #endif /* GSSEAP_ENABLE_REAUTH */
 433
 434     major = duplicateBuffer(minor, &credsToken, outputToken);
 435     if (GSS_ERROR(major)) {
 436         gss_release_buffer(&tmpMinor, &credsToken);
 437         return major;
 438     }
 439
 440 #ifdef GSSEAP_ENABLE_REAUTH
 441     gss_release_buffer(&tmpMinor, &credsToken);
 442 #endif
 443
 444     ctx->state = EAP_STATE_ESTABLISHED;
 445
 446     return GSS_S_COMPLETE;
 447 }
 448
 449 static OM_uint32
 450 eapGssSmAcceptEstablished(OM_uint32 *minor,
 451                           gss_ctx_id_t ctx,
 452                           gss_cred_id_t cred,
 453                           gss_buffer_t inputToken,
 454                           gss_channel_bindings_t chanBindings,
 455                           gss_buffer_t outputToken)
 456 {
 457     /* Called with already established context */
 458     *minor = EINVAL;
 459     return GSS_S_BAD_STATUS;
 460 }
 461
 462 static struct gss_eap_acceptor_sm {
 463     enum gss_eap_token_type inputTokenType;
 464     enum gss_eap_token_type outputTokenType;
 465     OM_uint32 (*processToken)(OM_uint32 *,
 466                               gss_ctx_id_t,
 467                               gss_cred_id_t,
 468                               gss_buffer_t,
 469                               gss_channel_bindings_t,
 470                               gss_buffer_t);
 471 } eapGssAcceptorSm[] = {
 472     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,    eapGssSmAcceptIdentity           },
 473     { TOK_TYPE_EAP_RESP,    TOK_TYPE_EAP_REQ,    eapGssSmAcceptAuthenticate       },
 474     { TOK_TYPE_EXT_REQ,     TOK_TYPE_NONE,       eapGssSmAcceptExtensionsReq      },
 475     { TOK_TYPE_NONE,        TOK_TYPE_EXT_RESP,   eapGssSmAcceptExtensionsResp     },
 476     { TOK_TYPE_NONE,        TOK_TYPE_NONE,       eapGssSmAcceptEstablished        },
 477 #ifdef GSSEAP_ENABLE_REAUTH
 478     { TOK_TYPE_GSS_REAUTH,  TOK_TYPE_GSS_REAUTH, eapGssSmAcceptGssReauth          },
 479 #endif
 480 };
 481
 482 OM_uint32
 483 gss_accept_sec_context(OM_uint32 *minor,
 484                        gss_ctx_id_t *context_handle,
 485                        gss_cred_id_t cred,
 486                        gss_buffer_t input_token,
 487                        gss_channel_bindings_t input_chan_bindings,
 488                        gss_name_t *src_name,
 489                        gss_OID *mech_type,
 490                        gss_buffer_t output_token,
 491                        OM_uint32 *ret_flags,
 492                        OM_uint32 *time_rec,
 493                        gss_cred_id_t *delegated_cred_handle)
 494 {
 495     OM_uint32 major;
 496     OM_uint32 tmpMajor, tmpMinor;
 497     gss_ctx_id_t ctx = *context_handle;
 498     struct gss_eap_acceptor_sm *sm = NULL;
 499     gss_buffer_desc innerInputToken = GSS_C_EMPTY_BUFFER;
 500     gss_buffer_desc innerOutputToken = GSS_C_EMPTY_BUFFER;
 501     enum gss_eap_token_type tokType;
 502     int initialContextToken = 0;
 503
 504     *minor = 0;
 505
 506     output_token->length = 0;
 507     output_token->value = NULL;
 508
 509     if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
 510         return GSS_S_DEFECTIVE_TOKEN;
 511     }
 512
 513     if (ctx == GSS_C_NO_CONTEXT) {
 514         major = gssEapAllocContext(minor, &ctx);
 515         if (GSS_ERROR(major))
 516             return major;
 517
 518         initialContextToken = 1;
 519         *context_handle = ctx;
 520     }
 521
 522     GSSEAP_MUTEX_LOCK(&ctx->mutex);
 523
 524     /* Validate and lock credentials */
 525     if (cred != GSS_C_NO_CREDENTIAL) {
 526         GSSEAP_MUTEX_LOCK(&cred->mutex);
 527
 528         if ((cred->flags & CRED_FLAG_ACCEPT) == 0) {
 529             major = GSS_S_NO_CRED;
 530             goto cleanup;
 531         }
 532     }
 533
 534     sm = &eapGssAcceptorSm[ctx->state];
 535
 536     major = gssEapVerifyToken(minor, ctx, input_token,
 537                               &tokType, &innerInputToken);
 538     if (GSS_ERROR(major))
 539         goto cleanup;
 540
 541     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 542         major = GSS_S_BAD_MECH;
 543         goto cleanup;
 544     }
 545
 546 #ifdef GSSEAP_ENABLE_REAUTH
 547     /*
 548      * If we're built with fast reauthentication support, it's valid
 549      * for an initiator to send a GSS reauthentication token as its
 550      * initial context token, causing us to short-circuit the state
 551      * machine and process Kerberos GSS messages instead.
 552      */
 553     if (tokType == TOK_TYPE_GSS_REAUTH && initialContextToken) {
 554         ctx->state = EAP_STATE_KRB_REAUTH_GSS;
 555     } else
 556 #endif
 557     if (tokType != sm->inputTokenType) {
 558         major = GSS_S_DEFECTIVE_TOKEN;
 559         goto cleanup;
 560     }
 561
 562     do {
 563         sm = &eapGssAcceptorSm[ctx->state];
 564
 565         major = (sm->processToken)(minor,
 566                                    ctx,
 567                                    cred,
 568                                    &innerInputToken,
 569                                    input_chan_bindings,
 570                                    &innerOutputToken);
 571         if (GSS_ERROR(major))
 572             goto cleanup;
 573     } while (major == GSS_S_CONTINUE_NEEDED && innerOutputToken.length == 0);
 574
 575     if (mech_type != NULL) {
 576         if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
 577             duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
 578     }
 579     if (innerOutputToken.value != NULL) {
 580         tmpMajor = gssEapMakeToken(&tmpMinor, ctx, &innerOutputToken,
 581                                    sm->outputTokenType, output_token);
 582         if (GSS_ERROR(tmpMajor)) {
 583             major = tmpMajor;
 584             *minor = tmpMinor;
 585             goto cleanup;
 586         }
 587     }
 588     if (ret_flags != NULL)
 589         *ret_flags = ctx->gssFlags;
 590     if (delegated_cred_handle != NULL)
 591         *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 592
 593     if (major == GSS_S_COMPLETE) {
 594         if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
 595             major = gssEapDuplicateName(&tmpMinor, ctx->initiatorName, src_name);
 596             if (GSS_ERROR(major))
 597                 goto cleanup;
 598         }
 599         if (time_rec != NULL)
 600             gssEapContextTime(&tmpMinor, ctx, time_rec);
 601     }
 602
 603     assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
 604
 605 cleanup:
 606     if (cred != GSS_C_NO_CREDENTIAL)
 607         GSSEAP_MUTEX_UNLOCK(&cred->mutex);
 608     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
 609
 610     if (GSS_ERROR(major))
 611         gssEapReleaseContext(&tmpMinor, context_handle);
 612
 613     gss_release_buffer(&tmpMinor, &innerOutputToken);
 614
 615     return major;
 616 }
 617
 618 #ifdef GSSEAP_ENABLE_REAUTH
 619 static OM_uint32
 620 acceptReadyKrb(OM_uint32 *minor,
 621                gss_ctx_id_t ctx,
 622                gss_cred_id_t cred,
 623                const gss_name_t initiator,
 624                const gss_OID mech,
 625                OM_uint32 timeRec)
 626 {
 627     OM_uint32 major;
 628
 629     major = gssEapGlueToMechName(minor, initiator, &ctx->initiatorName);
 630     if (GSS_ERROR(major))
 631         return major;
 632
 633     if (cred != GSS_C_NO_CREDENTIAL && cred->name != GSS_C_NO_NAME) {
 634         major = gssEapDuplicateName(minor, cred->name, &ctx->acceptorName);
 635         if (GSS_ERROR(major))
 636             return major;
 637     }
 638
 639     major = gssEapReauthComplete(minor, ctx, cred, mech, timeRec);
 640     if (GSS_ERROR(major))
 641         return major;
 642
 643     ctx->state = EAP_STATE_ESTABLISHED;
 644
 645     return GSS_S_COMPLETE;
 646 }
 647
 648 static OM_uint32
 649 eapGssSmAcceptGssReauth(OM_uint32 *minor,
 650                         gss_ctx_id_t ctx,
 651                         gss_cred_id_t cred,
 652                         gss_buffer_t inputToken,
 653                         gss_channel_bindings_t chanBindings,
 654                         gss_buffer_t outputToken)
 655 {
 656     OM_uint32 major, tmpMinor;
 657     gss_cred_id_t krbCred = GSS_C_NO_CREDENTIAL;
 658     gss_name_t krbInitiator = GSS_C_NO_NAME;
 659     gss_OID mech = GSS_C_NO_OID;
 660     OM_uint32 gssFlags, timeRec = GSS_C_INDEFINITE;
 661
 662     ctx->flags |= CTX_FLAG_KRB_REAUTH_GSS;
 663
 664     if (cred != GSS_C_NO_CREDENTIAL)
 665         krbCred = cred->krbCred;
 666
 667     major = gssAcceptSecContext(minor,
 668                                 &ctx->kerberosCtx,
 669                                 krbCred,
 670                                 inputToken,
 671                                 chanBindings,
 672                                 &krbInitiator,
 673                                 &mech,
 674                                 outputToken,
 675                                 &gssFlags,
 676                                 &timeRec,
 677                                 NULL);
 678     if (major == GSS_S_COMPLETE) {
 679         major = acceptReadyKrb(minor, ctx, cred,
 680                                krbInitiator, mech, timeRec);
 681     }
 682
 683     ctx->gssFlags = gssFlags;
 684
 685     gssReleaseName(&tmpMinor, &krbInitiator);
 686
 687     return major;
 688 }
 689 #endif /* GSSEAP_ENABLE_REAUTH */