www.project-moonshot.org Git - mech_eap.orig/blob - init_sec_context.c

   1 /*
   2  * Copyright (c) 2011, 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 /*
  34  * Establish a security context on the initiator (client). These functions
  35  * wrap around libeap.
  36  */
  37
  38 #include "gssapiP_eap.h"
  39
  40 static OM_uint32
  41 policyVariableToFlag(enum eapol_bool_var variable)
  42 {
  43     OM_uint32 flag = 0;
  44
  45     switch (variable) {
  46     case EAPOL_eapSuccess:
  47         flag = CTX_FLAG_EAP_SUCCESS;
  48         break;
  49     case EAPOL_eapRestart:
  50         flag = CTX_FLAG_EAP_RESTART;
  51         break;
  52     case EAPOL_eapFail:
  53         flag = CTX_FLAG_EAP_FAIL;
  54         break;
  55     case EAPOL_eapResp:
  56         flag = CTX_FLAG_EAP_RESP;
  57         break;
  58     case EAPOL_eapNoResp:
  59         flag = CTX_FLAG_EAP_NO_RESP;
  60         break;
  61     case EAPOL_eapReq:
  62         flag = CTX_FLAG_EAP_REQ;
  63         break;
  64     case EAPOL_portEnabled:
  65         flag = CTX_FLAG_EAP_PORT_ENABLED;
  66         break;
  67     case EAPOL_altAccept:
  68         flag = CTX_FLAG_EAP_ALT_ACCEPT;
  69         break;
  70     case EAPOL_altReject:
  71         flag = CTX_FLAG_EAP_ALT_REJECT;
  72         break;
  73     }
  74
  75     return flag;
  76 }
  77
  78 static struct eap_peer_config *
  79 peerGetConfig(void *ctx)
  80 {
  81     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
  82
  83     return &gssCtx->initiatorCtx.eapPeerConfig;
  84 }
  85
  86 static Boolean
  87 peerGetBool(void *data, enum eapol_bool_var variable)
  88 {
  89     gss_ctx_id_t ctx = data;
  90     OM_uint32 flag;
  91
  92     if (ctx == GSS_C_NO_CONTEXT)
  93         return FALSE;
  94
  95     flag = policyVariableToFlag(variable);
  96
  97     return ((ctx->flags & flag) != 0);
  98 }
  99
 100 static void
 101 peerSetBool(void *data, enum eapol_bool_var variable,
 102             Boolean value)
 103 {
 104     gss_ctx_id_t ctx = data;
 105     OM_uint32 flag;
 106
 107     if (ctx == GSS_C_NO_CONTEXT)
 108         return;
 109
 110     flag = policyVariableToFlag(variable);
 111
 112     if (value)
 113         ctx->flags |= flag;
 114     else
 115         ctx->flags &= ~(flag);
 116 }
 117
 118 static unsigned int
 119 peerGetInt(void *data, enum eapol_int_var variable)
 120 {
 121     gss_ctx_id_t ctx = data;
 122
 123     if (ctx == GSS_C_NO_CONTEXT)
 124         return FALSE;
 125
 126     assert(CTX_IS_INITIATOR(ctx));
 127
 128     switch (variable) {
 129     case EAPOL_idleWhile:
 130         return ctx->initiatorCtx.idleWhile;
 131         break;
 132     }
 133
 134     return 0;
 135 }
 136
 137 static void
 138 peerSetInt(void *data, enum eapol_int_var variable,
 139            unsigned int value)
 140 {
 141     gss_ctx_id_t ctx = data;
 142
 143     if (ctx == GSS_C_NO_CONTEXT)
 144         return;
 145
 146     assert(CTX_IS_INITIATOR(ctx));
 147
 148     switch (variable) {
 149     case EAPOL_idleWhile:
 150         ctx->initiatorCtx.idleWhile = value;
 151         break;
 152     }
 153 }
 154
 155 static struct wpabuf *
 156 peerGetEapReqData(void *ctx)
 157 {
 158     gss_ctx_id_t gssCtx = (gss_ctx_id_t)ctx;
 159
 160     return &gssCtx->initiatorCtx.reqData;
 161 }
 162
 163 static void
 164 peerSetConfigBlob(void *ctx GSSEAP_UNUSED,
 165                   struct wpa_config_blob *blob GSSEAP_UNUSED)
 166 {
 167 }
 168
 169 static const struct wpa_config_blob *
 170 peerGetConfigBlob(void *ctx GSSEAP_UNUSED,
 171                   const char *name GSSEAP_UNUSED)
 172 {
 173     return NULL;
 174 }
 175
 176 static void
 177 peerNotifyPending(void *ctx GSSEAP_UNUSED)
 178 {
 179 }
 180
 181 static struct eapol_callbacks gssEapPolicyCallbacks = {
 182     peerGetConfig,
 183     peerGetBool,
 184     peerSetBool,
 185     peerGetInt,
 186     peerSetInt,
 187     peerGetEapReqData,
 188     peerSetConfigBlob,
 189     peerGetConfigBlob,
 190     peerNotifyPending,
 191 };
 192
 193 #ifdef GSSEAP_DEBUG
 194 extern int wpa_debug_level;
 195 #endif
 196
 197 static OM_uint32
 198 peerConfigInit(OM_uint32 *minor,
 199                gss_cred_id_t cred,
 200                gss_ctx_id_t ctx)
 201 {
 202     krb5_context krbContext;
 203     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 204     krb5_error_code code;
 205     char *identity, *anonymousIdentity;
 206
 207     eapPeerConfig->identity = NULL;
 208     eapPeerConfig->identity_len = 0;
 209     eapPeerConfig->password = NULL;
 210     eapPeerConfig->password_len = 0;
 211
 212     assert(cred != GSS_C_NO_CREDENTIAL);
 213
 214     GSSEAP_KRB_INIT(&krbContext);
 215
 216     eapPeerConfig->fragment_size = 1024;
 217 #ifdef GSSEAP_DEBUG
 218     wpa_debug_level = 0;
 219 #endif
 220
 221     assert(cred->name != GSS_C_NO_NAME);
 222
 223     if ((cred->name->flags & (NAME_FLAG_NAI | NAME_FLAG_SERVICE)) == 0) {
 224         *minor = GSSEAP_BAD_INITIATOR_NAME;
 225         return GSS_S_BAD_NAME;
 226     }
 227
 228     code = krb5_unparse_name(krbContext, cred->name->krbPrincipal, &identity);
 229     if (code != 0) {
 230         *minor = code;
 231         return GSS_S_FAILURE;
 232     }
 233
 234     anonymousIdentity = strchr(identity, '@');
 235     if (anonymousIdentity == NULL)
 236         anonymousIdentity = "";
 237
 238     eapPeerConfig->identity = (unsigned char *)identity;
 239     eapPeerConfig->identity_len = strlen(identity);
 240     eapPeerConfig->anonymous_identity = (unsigned char *)anonymousIdentity;
 241     eapPeerConfig->anonymous_identity_len = strlen(anonymousIdentity);
 242     eapPeerConfig->password = (unsigned char *)cred->password.value;
 243     eapPeerConfig->password_len = cred->password.length;
 244
 245     *minor = 0;
 246     return GSS_S_COMPLETE;
 247 }
 248
 249 static OM_uint32
 250 peerConfigFree(OM_uint32 *minor,
 251                gss_ctx_id_t ctx)
 252 {
 253     krb5_context krbContext;
 254     struct eap_peer_config *eapPeerConfig = &ctx->initiatorCtx.eapPeerConfig;
 255
 256     GSSEAP_KRB_INIT(&krbContext);
 257
 258     krb5_free_unparsed_name(krbContext, (char *)eapPeerConfig->identity);
 259
 260     *minor = 0;
 261     return GSS_S_COMPLETE;
 262 }
 263
 264 /*
 265  * Mark an initiator context as ready for cryptographic operations
 266  */
 267 static OM_uint32
 268 initReady(OM_uint32 *minor, gss_ctx_id_t ctx, OM_uint32 reqFlags)
 269 {
 270     OM_uint32 major;
 271     const unsigned char *key;
 272     size_t keyLength;
 273
 274 #if 1
 275     /* XXX actually check for mutual auth */
 276     if (reqFlags & GSS_C_MUTUAL_FLAG)
 277         ctx->gssFlags |= GSS_C_MUTUAL_FLAG;
 278 #endif
 279
 280     /* Cache encryption type derived from selected mechanism OID */
 281     major = gssEapOidToEnctype(minor, ctx->mechanismUsed, &ctx->encryptionType);
 282     if (GSS_ERROR(major))
 283         return major;
 284
 285     if (!eap_key_available(ctx->initiatorCtx.eap)) {
 286         *minor = GSSEAP_KEY_UNAVAILABLE;
 287         return GSS_S_UNAVAILABLE;
 288     }
 289
 290     key = eap_get_eapKeyData(ctx->initiatorCtx.eap, &keyLength);
 291
 292     if (keyLength < EAP_EMSK_LEN) {
 293         *minor = GSSEAP_KEY_TOO_SHORT;
 294         return GSS_S_UNAVAILABLE;
 295     }
 296
 297     major = gssEapDeriveRfc3961Key(minor,
 298                                    &key[EAP_EMSK_LEN / 2],
 299                                    EAP_EMSK_LEN / 2,
 300                                    ctx->encryptionType,
 301                                    &ctx->rfc3961Key);
 302        if (GSS_ERROR(major))
 303            return major;
 304
 305     major = rfc3961ChecksumTypeForKey(minor, &ctx->rfc3961Key,
 306                                       &ctx->checksumType);
 307     if (GSS_ERROR(major))
 308         return major;
 309
 310     major = sequenceInit(minor,
 311                          &ctx->seqState,
 312                          ctx->recvSeq,
 313                          ((ctx->gssFlags & GSS_C_REPLAY_FLAG) != 0),
 314                          ((ctx->gssFlags & GSS_C_SEQUENCE_FLAG) != 0),
 315                          TRUE);
 316     if (GSS_ERROR(major))
 317         return major;
 318
 319     *minor = 0;
 320     return GSS_S_COMPLETE;
 321 }
 322
 323 static OM_uint32
 324 initBegin(OM_uint32 *minor,
 325           gss_cred_id_t cred,
 326           gss_ctx_id_t ctx,
 327           gss_name_t target,
 328           gss_OID mech,
 329           OM_uint32 reqFlags GSSEAP_UNUSED,
 330           OM_uint32 timeReq,
 331           gss_channel_bindings_t chanBindings GSSEAP_UNUSED)
 332 {
 333     OM_uint32 major;
 334
 335     assert(cred != GSS_C_NO_CREDENTIAL);
 336
 337     if (cred->expiryTime)
 338         ctx->expiryTime = cred->expiryTime;
 339     else if (timeReq == 0 || timeReq == GSS_C_INDEFINITE)
 340         ctx->expiryTime = 0;
 341     else
 342         ctx->expiryTime = time(NULL) + timeReq;
 343
 344     /*
 345      * The credential mutex protects its name, however we need to
 346      * explicitly lock the acceptor name (unlikely as it may be
 347      * that it has attributes set on it).
 348      */
 349     major = gssEapDuplicateName(minor, cred->name, &ctx->initiatorName);
 350     if (GSS_ERROR(major))
 351         return major;
 352
 353     if (target != GSS_C_NO_NAME) {
 354         GSSEAP_MUTEX_LOCK(&target->mutex);
 355
 356         major = gssEapDuplicateName(minor, target, &ctx->acceptorName);
 357         if (GSS_ERROR(major)) {
 358             GSSEAP_MUTEX_UNLOCK(&target->mutex);
 359             return major;
 360         }
 361
 362         GSSEAP_MUTEX_UNLOCK(&target->mutex);
 363     }
 364
 365     major = gssEapCanonicalizeOid(minor,
 366                                   mech,
 367                                   OID_FLAG_NULL_VALID | OID_FLAG_MAP_NULL_TO_DEFAULT_MECH,
 368                                   &ctx->mechanismUsed);
 369     if (GSS_ERROR(major))
 370         return major;
 371
 372     /* If credentials were provided, check they're usable with this mech */
 373     if (!gssEapCredAvailable(cred, ctx->mechanismUsed)) {
 374         *minor = GSSEAP_CRED_MECH_MISMATCH;
 375         return GSS_S_BAD_MECH;
 376     }
 377
 378     *minor = 0;
 379     return GSS_S_COMPLETE;
 380 }
 381
 382 static OM_uint32
 383 eapGssSmInitError(OM_uint32 *minor,
 384                   gss_cred_id_t cred GSSEAP_UNUSED,
 385                   gss_ctx_id_t ctx GSSEAP_UNUSED,
 386                   gss_name_t target GSSEAP_UNUSED,
 387                   gss_OID mech GSSEAP_UNUSED,
 388                   OM_uint32 reqFlags GSSEAP_UNUSED,
 389                   OM_uint32 timeReq GSSEAP_UNUSED,
 390                   gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 391                   gss_buffer_t inputToken,
 392                   gss_buffer_t outputToken GSSEAP_UNUSED,
 393                   OM_uint32 *smFlags GSSEAP_UNUSED)
 394 {
 395     OM_uint32 major;
 396     unsigned char *p;
 397
 398     if (inputToken->length < 8) {
 399         *minor = GSSEAP_TOK_TRUNC;
 400         return GSS_S_DEFECTIVE_TOKEN;
 401     }
 402
 403     p = (unsigned char *)inputToken->value;
 404
 405     major = load_uint32_be(&p[0]);
 406     *minor = ERROR_TABLE_BASE_eapg + load_uint32_be(&p[4]);
 407
 408     if (!GSS_ERROR(major) || !IS_WIRE_ERROR(*minor)) {
 409         major = GSS_S_FAILURE;
 410         *minor = GSSEAP_BAD_ERROR_TOKEN;
 411     }
 412
 413     assert(GSS_ERROR(major));
 414
 415     return major;
 416 }
 417
 418 #ifdef GSSEAP_ENABLE_REAUTH
 419 static OM_uint32
 420 eapGssSmInitGssReauth(OM_uint32 *minor,
 421                       gss_cred_id_t cred,
 422                       gss_ctx_id_t ctx,
 423                       gss_name_t target,
 424                       gss_OID mech GSSEAP_UNUSED,
 425                       OM_uint32 reqFlags,
 426                       OM_uint32 timeReq,
 427                       gss_channel_bindings_t chanBindings,
 428                       gss_buffer_t inputToken,
 429                       gss_buffer_t outputToken,
 430                       OM_uint32 *smFlags GSSEAP_UNUSED)
 431 {
 432     OM_uint32 major, tmpMinor;
 433     gss_name_t mechTarget = GSS_C_NO_NAME;
 434     gss_OID actualMech = GSS_C_NO_OID;
 435     OM_uint32 gssFlags, timeRec;
 436
 437     assert(cred != GSS_C_NO_CREDENTIAL);
 438
 439     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL) {
 440         if (!gssEapCanReauthP(cred, target, timeReq))
 441             return GSS_S_CONTINUE_NEEDED;
 442
 443         ctx->flags |= CTX_FLAG_KRB_REAUTH;
 444     } else if ((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0) {
 445         major = GSS_S_DEFECTIVE_TOKEN;
 446         *minor = GSSEAP_WRONG_ITOK;
 447         goto cleanup;
 448     }
 449
 450     major = gssEapMechToGlueName(minor, target, &mechTarget);
 451     if (GSS_ERROR(major))
 452         goto cleanup;
 453
 454     major = gssInitSecContext(minor,
 455                               cred->krbCred,
 456                               &ctx->kerberosCtx,
 457                               mechTarget,
 458                               (gss_OID)gss_mech_krb5,
 459                               reqFlags | GSS_C_MUTUAL_FLAG,
 460                               timeReq,
 461                               chanBindings,
 462                               inputToken,
 463                               &actualMech,
 464                               outputToken,
 465                               &gssFlags,
 466                               &timeRec);
 467     if (GSS_ERROR(major))
 468         goto cleanup;
 469
 470     ctx->gssFlags = gssFlags;
 471
 472     if (major == GSS_S_COMPLETE) {
 473         assert(GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE);
 474
 475         major = gssEapReauthComplete(minor, ctx, cred, actualMech, timeRec);
 476         if (GSS_ERROR(major))
 477             goto cleanup;
 478         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
 479     } else {
 480         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_REAUTHENTICATE);
 481     }
 482
 483 cleanup:
 484     gssReleaseName(&tmpMinor, &mechTarget);
 485
 486     return major;
 487 }
 488 #endif /* GSSEAP_ENABLE_REAUTH */
 489
 490 #ifdef GSSEAP_DEBUG
 491 static OM_uint32
 492 eapGssSmInitVendorInfo(OM_uint32 *minor,
 493                        gss_cred_id_t cred GSSEAP_UNUSED,
 494                        gss_ctx_id_t ctx GSSEAP_UNUSED,
 495                        gss_name_t target GSSEAP_UNUSED,
 496                        gss_OID mech GSSEAP_UNUSED,
 497                        OM_uint32 reqFlags GSSEAP_UNUSED,
 498                        OM_uint32 timeReq GSSEAP_UNUSED,
 499                        gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 500                        gss_buffer_t inputToken GSSEAP_UNUSED,
 501                        gss_buffer_t outputToken,
 502                        OM_uint32 *smFlags GSSEAP_UNUSED)
 503 {
 504     OM_uint32 major;
 505
 506     major = makeStringBuffer(minor, "JANET(UK)", outputToken);
 507     if (GSS_ERROR(major))
 508         return major;
 509
 510     return GSS_S_CONTINUE_NEEDED;
 511 }
 512 #endif
 513
 514 static OM_uint32
 515 eapGssSmInitAcceptorName(OM_uint32 *minor,
 516                          gss_cred_id_t cred GSSEAP_UNUSED,
 517                          gss_ctx_id_t ctx,
 518                          gss_name_t target GSSEAP_UNUSED,
 519                          gss_OID mech GSSEAP_UNUSED,
 520                          OM_uint32 reqFlags GSSEAP_UNUSED,
 521                          OM_uint32 timeReq GSSEAP_UNUSED,
 522                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 523                          gss_buffer_t inputToken GSSEAP_UNUSED,
 524                          gss_buffer_t outputToken,
 525                          OM_uint32 *smFlags GSSEAP_UNUSED)
 526 {
 527     OM_uint32 major;
 528
 529     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_INITIAL &&
 530         ctx->acceptorName != GSS_C_NO_NAME) {
 531
 532         /* Send desired target name to acceptor */
 533         major = gssEapDisplayName(minor, ctx->acceptorName,
 534                                   outputToken, NULL);
 535         if (GSS_ERROR(major))
 536             return major;
 537     } else if (inputToken != GSS_C_NO_BUFFER &&
 538                ctx->acceptorName == GSS_C_NO_NAME) {
 539         /* Accept target name hint from acceptor */
 540         major = gssEapImportName(minor, inputToken,
 541                                  GSS_C_NT_USER_NAME,
 542                                  ctx->mechanismUsed,
 543                                  &ctx->acceptorName);
 544         if (GSS_ERROR(major))
 545             return major;
 546     }
 547
 548     /*
 549      * Currently, other parts of the code assume that the acceptor name
 550      * is available, hence this check.
 551      */
 552     if (ctx->acceptorName == GSS_C_NO_NAME) {
 553         *minor = GSSEAP_NO_ACCEPTOR_NAME;
 554         return GSS_S_FAILURE;
 555     }
 556
 557     return GSS_S_CONTINUE_NEEDED;
 558 }
 559
 560 static OM_uint32
 561 eapGssSmInitIdentity(OM_uint32 *minor,
 562                      gss_cred_id_t cred GSSEAP_UNUSED,
 563                      gss_ctx_id_t ctx,
 564                      gss_name_t target GSSEAP_UNUSED,
 565                      gss_OID mech GSSEAP_UNUSED,
 566                      OM_uint32 reqFlags GSSEAP_UNUSED,
 567                      OM_uint32 timeReq GSSEAP_UNUSED,
 568                      gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 569                      gss_buffer_t inputToken GSSEAP_UNUSED,
 570                      gss_buffer_t outputToken GSSEAP_UNUSED,
 571                      OM_uint32 *smFlags)
 572 {
 573     struct eap_config eapConfig;
 574
 575 #ifdef GSSEAP_ENABLE_REAUTH
 576     if (GSSEAP_SM_STATE(ctx) == GSSEAP_STATE_REAUTHENTICATE) {
 577         OM_uint32 tmpMinor;
 578
 579         /* server didn't support reauthentication, sent EAP request */
 580         gssDeleteSecContext(&tmpMinor, &ctx->kerberosCtx, GSS_C_NO_BUFFER);
 581         ctx->flags &= ~(CTX_FLAG_KRB_REAUTH);
 582         GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_INITIAL);
 583     } else
 584 #endif
 585         *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
 586
 587     assert((ctx->flags & CTX_FLAG_KRB_REAUTH) == 0);
 588     assert(inputToken == GSS_C_NO_BUFFER);
 589
 590     memset(&eapConfig, 0, sizeof(eapConfig));
 591
 592     ctx->initiatorCtx.eap = eap_peer_sm_init(ctx,
 593                                              &gssEapPolicyCallbacks,
 594                                              ctx,
 595                                              &eapConfig);
 596     if (ctx->initiatorCtx.eap == NULL) {
 597         *minor = GSSEAP_PEER_SM_INIT_FAILURE;
 598         return GSS_S_FAILURE;
 599     }
 600
 601     ctx->flags |= CTX_FLAG_EAP_RESTART | CTX_FLAG_EAP_PORT_ENABLED;
 602
 603     /* poke EAP state machine */
 604     if (eap_peer_sm_step(ctx->initiatorCtx.eap) != 0) {
 605         *minor = GSSEAP_PEER_SM_STEP_FAILURE;
 606         return GSS_S_FAILURE;
 607     }
 608
 609     GSSEAP_SM_TRANSITION_NEXT(ctx);
 610
 611     *minor = 0;
 612
 613     return GSS_S_CONTINUE_NEEDED;
 614 }
 615
 616 static OM_uint32
 617 eapGssSmInitAuthenticate(OM_uint32 *minor,
 618                          gss_cred_id_t cred,
 619                          gss_ctx_id_t ctx,
 620                          gss_name_t target GSSEAP_UNUSED,
 621                          gss_OID mech GSSEAP_UNUSED,
 622                          OM_uint32 reqFlags GSSEAP_UNUSED,
 623                          OM_uint32 timeReq GSSEAP_UNUSED,
 624                          gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 625                          gss_buffer_t inputToken GSSEAP_UNUSED,
 626                          gss_buffer_t outputToken,
 627                          OM_uint32 *smFlags)
 628 {
 629     OM_uint32 major;
 630     OM_uint32 tmpMinor;
 631     int code;
 632     struct wpabuf *resp = NULL;
 633
 634     *minor = 0;
 635
 636     assert(inputToken != GSS_C_NO_BUFFER);
 637
 638     major = peerConfigInit(minor, cred, ctx);
 639     if (GSS_ERROR(major))
 640         goto cleanup;
 641
 642     assert(ctx->initiatorCtx.eap != NULL);
 643     assert(ctx->flags & CTX_FLAG_EAP_PORT_ENABLED);
 644
 645     ctx->flags |= CTX_FLAG_EAP_REQ; /* we have a Request from the acceptor */
 646
 647     wpabuf_set(&ctx->initiatorCtx.reqData,
 648                inputToken->value, inputToken->length);
 649
 650     major = GSS_S_CONTINUE_NEEDED;
 651
 652     code = eap_peer_sm_step(ctx->initiatorCtx.eap);
 653     if (ctx->flags & CTX_FLAG_EAP_RESP) {
 654         ctx->flags &= ~(CTX_FLAG_EAP_RESP);
 655
 656         resp = eap_get_eapRespData(ctx->initiatorCtx.eap);
 657     } else if (ctx->flags & CTX_FLAG_EAP_SUCCESS) {
 658         major = initReady(minor, ctx, reqFlags);
 659         if (GSS_ERROR(major))
 660             goto cleanup;
 661
 662         ctx->flags &= ~(CTX_FLAG_EAP_SUCCESS);
 663         major = GSS_S_CONTINUE_NEEDED;
 664         GSSEAP_SM_TRANSITION_NEXT(ctx);
 665     } else if (ctx->flags & CTX_FLAG_EAP_FAIL) {
 666         major = GSS_S_DEFECTIVE_CREDENTIAL;
 667         *minor = GSSEAP_PEER_AUTH_FAILURE;
 668     } else {
 669         major = GSS_S_DEFECTIVE_TOKEN;
 670         *minor = GSSEAP_PEER_BAD_MESSAGE;
 671     }
 672
 673 cleanup:
 674     if (resp != NULL) {
 675         OM_uint32 tmpMajor;
 676         gss_buffer_desc respBuf;
 677
 678         assert(major == GSS_S_CONTINUE_NEEDED);
 679
 680         respBuf.length = wpabuf_len(resp);
 681         respBuf.value = (void *)wpabuf_head(resp);
 682
 683         tmpMajor = duplicateBuffer(&tmpMinor, &respBuf, outputToken);
 684         if (GSS_ERROR(tmpMajor)) {
 685             major = tmpMajor;
 686             *minor = tmpMinor;
 687         }
 688
 689         *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 690     }
 691
 692     wpabuf_set(&ctx->initiatorCtx.reqData, NULL, 0);
 693     peerConfigFree(&tmpMinor, ctx);
 694
 695     return major;
 696 }
 697
 698 static OM_uint32
 699 eapGssSmInitGssChannelBindings(OM_uint32 *minor,
 700                                gss_cred_id_t cred GSSEAP_UNUSED,
 701                                gss_ctx_id_t ctx,
 702                                gss_name_t target GSSEAP_UNUSED,
 703                                gss_OID mech GSSEAP_UNUSED,
 704                                OM_uint32 reqFlags GSSEAP_UNUSED,
 705                                OM_uint32 timeReq GSSEAP_UNUSED,
 706                                gss_channel_bindings_t chanBindings,
 707                                gss_buffer_t inputToken GSSEAP_UNUSED,
 708                                gss_buffer_t outputToken,
 709                                OM_uint32 *smFlags)
 710 {
 711     OM_uint32 major;
 712     gss_buffer_desc buffer = GSS_C_EMPTY_BUFFER;
 713
 714     if (chanBindings != GSS_C_NO_CHANNEL_BINDINGS)
 715         buffer = chanBindings->application_data;
 716
 717     major = gssEapWrap(minor, ctx, TRUE, GSS_C_QOP_DEFAULT,
 718                        &buffer, NULL, outputToken);
 719     if (GSS_ERROR(major))
 720         return major;
 721
 722     assert(outputToken->value != NULL);
 723
 724     *minor = 0;
 725     *smFlags |= SM_FLAG_OUTPUT_TOKEN_CRITICAL;
 726
 727     return GSS_S_CONTINUE_NEEDED;
 728 }
 729
 730 #ifdef GSSEAP_ENABLE_REAUTH
 731 static OM_uint32
 732 eapGssSmInitReauthCreds(OM_uint32 *minor,
 733                         gss_cred_id_t cred,
 734                         gss_ctx_id_t ctx,
 735                         gss_name_t target GSSEAP_UNUSED,
 736                         gss_OID mech GSSEAP_UNUSED,
 737                         OM_uint32 reqFlags GSSEAP_UNUSED,
 738                         OM_uint32 timeReq GSSEAP_UNUSED,
 739                         gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 740                         gss_buffer_t inputToken,
 741                         gss_buffer_t outputToken GSSEAP_UNUSED,
 742                         OM_uint32 *smFlags GSSEAP_UNUSED)
 743 {
 744     OM_uint32 major;
 745
 746     if (ctx->gssFlags & GSS_C_MUTUAL_FLAG) {
 747         major = gssEapStoreReauthCreds(minor, ctx, cred, inputToken);
 748         if (GSS_ERROR(major))
 749             return major;
 750     }
 751
 752     *minor = 0;
 753     return GSS_S_CONTINUE_NEEDED;
 754 }
 755 #endif /* GSSEAP_ENABLE_REAUTH */
 756
 757 static OM_uint32
 758 eapGssSmInitCompleteInitiatorExts(OM_uint32 *minor,
 759                                   gss_cred_id_t cred GSSEAP_UNUSED,
 760                                   gss_ctx_id_t ctx,
 761                                   gss_name_t target GSSEAP_UNUSED,
 762                                   gss_OID mech GSSEAP_UNUSED,
 763                                   OM_uint32 reqFlags GSSEAP_UNUSED,
 764                                   OM_uint32 timeReq GSSEAP_UNUSED,
 765                                   gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 766                                   gss_buffer_t inputToken GSSEAP_UNUSED,
 767                                   gss_buffer_t outputToken GSSEAP_UNUSED,
 768                                   OM_uint32 *smFlags)
 769 {
 770     GSSEAP_SM_TRANSITION_NEXT(ctx);
 771
 772     *minor = 0;
 773     *smFlags |= SM_FLAG_FORCE_SEND_TOKEN;
 774
 775     return GSS_S_CONTINUE_NEEDED;
 776 }
 777
 778 static OM_uint32
 779 eapGssSmInitCompleteAcceptorExts(OM_uint32 *minor,
 780                                  gss_cred_id_t cred GSSEAP_UNUSED,
 781                                  gss_ctx_id_t ctx,
 782                                  gss_name_t target GSSEAP_UNUSED,
 783                                  gss_OID mech GSSEAP_UNUSED,
 784                                  OM_uint32 reqFlags GSSEAP_UNUSED,
 785                                  OM_uint32 timeReq GSSEAP_UNUSED,
 786                                  gss_channel_bindings_t chanBindings GSSEAP_UNUSED,
 787                                  gss_buffer_t inputToken GSSEAP_UNUSED,
 788                                  gss_buffer_t outputToken GSSEAP_UNUSED,
 789                                  OM_uint32 *smFlags GSSEAP_UNUSED)
 790 {
 791     GSSEAP_SM_TRANSITION(ctx, GSSEAP_STATE_ESTABLISHED);
 792
 793     *minor = 0;
 794
 795     return GSS_S_COMPLETE;
 796 }
 797
 798 static struct gss_eap_sm eapGssInitiatorSm[] = {
 799     {
 800         ITOK_TYPE_CONTEXT_ERR,
 801         ITOK_TYPE_NONE,
 802         GSSEAP_STATE_ALL & ~(GSSEAP_STATE_INITIAL),
 803         0,
 804         eapGssSmInitError
 805     },
 806     {
 807         ITOK_TYPE_ACCEPTOR_NAME_RESP,
 808         ITOK_TYPE_ACCEPTOR_NAME_REQ,
 809         GSSEAP_STATE_INITIAL | GSSEAP_STATE_AUTHENTICATE,
 810         0,
 811         eapGssSmInitAcceptorName
 812     },
 813 #ifdef GSSEAP_DEBUG
 814     {
 815         ITOK_TYPE_NONE,
 816         ITOK_TYPE_VENDOR_INFO,
 817         GSSEAP_STATE_INITIAL,
 818         0,
 819         eapGssSmInitVendorInfo
 820     },
 821 #endif
 822 #ifdef GSSEAP_ENABLE_REAUTH
 823     {
 824         ITOK_TYPE_REAUTH_RESP,
 825         ITOK_TYPE_REAUTH_REQ,
 826         GSSEAP_STATE_INITIAL | GSSEAP_STATE_REAUTHENTICATE,
 827         0,
 828         eapGssSmInitGssReauth
 829     },
 830 #endif
 831     {
 832         ITOK_TYPE_NONE,
 833         ITOK_TYPE_NONE,
 834 #ifdef GSSEAP_ENABLE_REAUTH
 835         GSSEAP_STATE_REAUTHENTICATE |
 836 #endif
 837         GSSEAP_STATE_INITIAL,
 838         SM_ITOK_FLAG_REQUIRED,
 839         eapGssSmInitIdentity
 840     },
 841     {
 842         ITOK_TYPE_EAP_REQ,
 843         ITOK_TYPE_EAP_RESP,
 844         GSSEAP_STATE_AUTHENTICATE,
 845         SM_ITOK_FLAG_REQUIRED,
 846         eapGssSmInitAuthenticate
 847     },
 848     {
 849         ITOK_TYPE_NONE,
 850         ITOK_TYPE_GSS_CHANNEL_BINDINGS,
 851         GSSEAP_STATE_INITIATOR_EXTS,
 852         SM_ITOK_FLAG_REQUIRED,
 853         eapGssSmInitGssChannelBindings
 854     },
 855     {
 856         ITOK_TYPE_NONE,
 857         ITOK_TYPE_NONE,
 858         GSSEAP_STATE_INITIATOR_EXTS,
 859         0,
 860         eapGssSmInitCompleteInitiatorExts
 861     },
 862 #ifdef GSSEAP_ENABLE_REAUTH
 863     {
 864         ITOK_TYPE_REAUTH_CREDS,
 865         ITOK_TYPE_NONE,
 866         GSSEAP_STATE_ACCEPTOR_EXTS,
 867         0,
 868         eapGssSmInitReauthCreds
 869     },
 870 #endif
 871     /* other extensions go here */
 872     {
 873         ITOK_TYPE_NONE,
 874         ITOK_TYPE_NONE,
 875         GSSEAP_STATE_ACCEPTOR_EXTS,
 876         0,
 877         eapGssSmInitCompleteAcceptorExts
 878     }
 879 };
 880
 881 OM_uint32
 882 gss_init_sec_context(OM_uint32 *minor,
 883                      gss_cred_id_t cred,
 884                      gss_ctx_id_t *context_handle,
 885                      gss_name_t target_name,
 886                      gss_OID mech_type,
 887                      OM_uint32 req_flags,
 888                      OM_uint32 time_req,
 889                      gss_channel_bindings_t input_chan_bindings,
 890                      gss_buffer_t input_token,
 891                      gss_OID *actual_mech_type,
 892                      gss_buffer_t output_token,
 893                      OM_uint32 *ret_flags,
 894                      OM_uint32 *time_rec)
 895 {
 896     OM_uint32 major, tmpMinor;
 897     gss_ctx_id_t ctx = *context_handle;
 898     int initialContextToken = 0;
 899
 900     *minor = 0;
 901
 902     output_token->length = 0;
 903     output_token->value = NULL;
 904
 905     if (ctx == GSS_C_NO_CONTEXT) {
 906         if (input_token != GSS_C_NO_BUFFER && input_token->length != 0) {
 907             *minor = GSSEAP_WRONG_SIZE;
 908             return GSS_S_DEFECTIVE_TOKEN;
 909         }
 910
 911         major = gssEapAllocContext(minor, &ctx);
 912         if (GSS_ERROR(major))
 913             return major;
 914
 915         ctx->flags |= CTX_FLAG_INITIATOR;
 916         initialContextToken = 1;
 917
 918         *context_handle = ctx;
 919     }
 920
 921     GSSEAP_MUTEX_LOCK(&ctx->mutex);
 922
 923     if (cred == GSS_C_NO_CREDENTIAL) {
 924         if (ctx->defaultCred == GSS_C_NO_CREDENTIAL) {
 925             major = gssEapAcquireCred(minor,
 926                                       GSS_C_NO_NAME,
 927                                       GSS_C_NO_BUFFER,
 928                                       time_req,
 929                                       GSS_C_NO_OID_SET,
 930                                       GSS_C_INITIATE,
 931                                       &ctx->defaultCred,
 932                                       NULL,
 933                                       NULL);
 934             if (GSS_ERROR(major))
 935                 goto cleanup;
 936         }
 937
 938         cred = ctx->defaultCred;
 939     }
 940
 941     GSSEAP_MUTEX_LOCK(&cred->mutex);
 942
 943     if ((cred->flags & CRED_FLAG_INITIATE) == 0) {
 944         major = GSS_S_NO_CRED;
 945         *minor = GSSEAP_CRED_USAGE_MISMATCH;
 946         goto cleanup;
 947     }
 948
 949     if (initialContextToken) {
 950         major = initBegin(minor, cred, ctx, target_name, mech_type,
 951                           req_flags, time_req, input_chan_bindings);
 952         if (GSS_ERROR(major))
 953             goto cleanup;
 954     }
 955
 956     major = gssEapSmStep(minor,
 957                          cred,
 958                          ctx,
 959                          target_name,
 960                          mech_type,
 961                          req_flags,
 962                          time_req,
 963                          input_chan_bindings,
 964                          input_token,
 965                          output_token,
 966                          eapGssInitiatorSm,
 967                          sizeof(eapGssInitiatorSm) / sizeof(eapGssInitiatorSm[0]));
 968     if (GSS_ERROR(major))
 969         goto cleanup;
 970
 971     if (actual_mech_type != NULL) {
 972         OM_uint32 tmpMajor;
 973
 974         tmpMajor = gssEapCanonicalizeOid(&tmpMinor, ctx->mechanismUsed, 0, actual_mech_type);
 975         if (GSS_ERROR(tmpMajor)) {
 976             major = tmpMajor;
 977             *minor = tmpMinor;
 978             goto cleanup;
 979         }
 980     }
 981     if (ret_flags != NULL)
 982         *ret_flags = ctx->gssFlags;
 983     if (time_rec != NULL)
 984         gssEapContextTime(&tmpMinor, ctx, time_rec);
 985
 986     assert(CTX_IS_ESTABLISHED(ctx) || major == GSS_S_CONTINUE_NEEDED);
 987
 988 cleanup:
 989     if (cred != GSS_C_NO_CREDENTIAL)
 990         GSSEAP_MUTEX_UNLOCK(&cred->mutex);
 991     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
 992
 993     if (GSS_ERROR(major))
 994         gssEapReleaseContext(&tmpMinor, context_handle);
 995
 996     return major;
 997 }