1/* 2 * Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * Portions Copyright (c) 2004 PADL Software Pty Ltd. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include "spnego_locl.h" 35 36#define GKIS(name) \ 37static \ 38OM_uint32 name(OM_uint32 *, gss_cred_id_t, gssspnego_ctx, \ 39 gss_name_t, const gss_OID, \ 40 OM_uint32, OM_uint32, const gss_channel_bindings_t, \ 41 const gss_buffer_t, gss_buffer_t, \ 42 OM_uint32 *, OM_uint32 *) 43 44GKIS(spnego_initial); 45GKIS(spnego_reply); 46GKIS(wait_server_mic); 47GKIS(step_completed); 48 49 50 51/* 52 * Is target_name an sane target for `mech´. 53 */ 54 55struct mech_selection { 56 OM_uint32 req_flags; 57 gss_name_t target_name; 58 OM_uint32 time_req; 59 gss_channel_bindings_t input_chan_bindings; 60 /* out */ 61 gss_OID preferred_mech_type; 62 gss_OID negotiated_mech_type; 63 gss_buffer_desc optimistic_token; 64 OM_uint32 optimistic_flags; 65 gss_ctx_id_t gssctx; 66 int complete; 67}; 68 69 70static OM_uint32 71initiator_approved(void *userptr, 72 gss_name_t target_name, 73 const gss_cred_id_t cred, 74 gss_OID mech) 75{ 76 OM_uint32 min_stat, maj_stat; 77 gss_ctx_id_t ctx = GSS_C_NO_CONTEXT; 78 gss_buffer_desc out; 79 struct mech_selection *sel = userptr; 80 gss_OID negotiated_mech_type = GSS_C_NO_OID; 81 OM_uint32 flags = 0; 82 83 maj_stat = gss_init_sec_context(&min_stat, 84 cred, 85 &ctx, 86 sel->target_name, 87 mech, 88 sel->req_flags, 89 sel->time_req, 90 sel->input_chan_bindings, 91 GSS_C_NO_BUFFER, 92 &negotiated_mech_type, 93 &out, 94 &flags, 95 NULL); 96 if (GSS_ERROR(maj_stat)) { 97 gss_mg_collect_error(mech, GSS_S_BAD_MECH, min_stat); 98 return GSS_S_BAD_MECH; 99 } 100 if (sel->preferred_mech_type == NULL) { 101 sel->preferred_mech_type = mech; 102 sel->negotiated_mech_type = negotiated_mech_type; 103 sel->optimistic_token = out; 104 sel->optimistic_flags = flags; 105 sel->gssctx = ctx; 106 if (maj_stat == GSS_S_COMPLETE) 107 sel->complete = 1; 108 } else { 109 gss_release_buffer(&min_stat, &out); 110 gss_delete_sec_context(&min_stat, &ctx, NULL); 111 } 112 113 return GSS_S_COMPLETE; 114} 115 116/* 117 * Send a reply. Note that we only need to send a reply if we 118 * need to send a MIC or a mechanism token. Otherwise, we can 119 * return an empty buffer. 120 * 121 * The return value of this will be returned to the API, so it 122 * must return GSS_S_CONTINUE_NEEDED if a token was generated. 123 */ 124static OM_uint32 125make_reply(OM_uint32 *minor_status, 126 gssspnego_ctx ctx, 127 gss_buffer_t mech_token, 128 gss_buffer_t output_token) 129{ 130 NegotiationToken nt; 131 gss_buffer_desc mic_buf; 132 OM_uint32 ret; 133 size_t size; 134 NegResultEnum result; 135 136 memset(&nt, 0, sizeof(nt)); 137 138 nt.element = choice_NegotiationToken_negTokenResp; 139 nt.u.negTokenResp.negResult = NULL; 140 nt.u.negTokenResp.supportedMech = NULL; 141 142 output_token->length = 0; 143 output_token->value = NULL; 144 145 /* figure out our status */ 146 147 if (ctx->flags.open) { 148 if (ctx->flags.verified_mic == 1 || ctx->flags.require_mic == 0) 149 result = accept_completed; 150 else 151 result = accept_incomplete; 152 } else { 153 result = accept_incomplete; 154 } 155 156 if (mech_token->length == 0) { 157 nt.u.negTokenResp.responseToken = NULL; 158 } else { 159 ALLOC(nt.u.negTokenResp.responseToken, 1); 160 if (nt.u.negTokenResp.responseToken == NULL) { 161 free_NegotiationToken(&nt); 162 *minor_status = ENOMEM; 163 return GSS_S_FAILURE; 164 } 165 nt.u.negTokenResp.responseToken->length = mech_token->length; 166 nt.u.negTokenResp.responseToken->data = mech_token->value; 167 mech_token->length = 0; 168 mech_token->value = NULL; 169 } 170 171 /* 172 * XXX should limit when we send the MIC ? 173 */ 174 175 if (ctx->flags.open && ctx->flags.sent_mic == 0) { 176 177 ctx->flags.sent_mic = 1; 178 179 ret = gss_get_mic(minor_status, 180 ctx->negotiated_ctx_id, 181 0, 182 &ctx->NegTokenInit_mech_types, 183 &mic_buf); 184 if (ret == GSS_S_COMPLETE) { 185 ALLOC(nt.u.negTokenResp.mechListMIC, 1); 186 if (nt.u.negTokenResp.mechListMIC == NULL) { 187 gss_release_buffer(minor_status, &mic_buf); 188 free_NegotiationToken(&nt); 189 *minor_status = ENOMEM; 190 return GSS_S_FAILURE; 191 } 192 193 nt.u.negTokenResp.mechListMIC->length = mic_buf.length; 194 nt.u.negTokenResp.mechListMIC->data = mic_buf.value; 195 /* mic_buf free()d with nt */ 196 } else if (ret == GSS_S_UNAVAILABLE) { 197 /* lets hope that its ok to not send te mechListMIC for broken mechs */ 198 nt.u.negTokenResp.mechListMIC = NULL; 199 ctx->flags.require_mic = 0; 200 } else { 201 free_NegotiationToken(&nt); 202 *minor_status = ENOMEM; 203 return gss_mg_set_error_string(GSS_SPNEGO_MECHANISM, 204 ret, *minor_status, 205 "SPNEGO failed to sign MIC"); 206 } 207 } else { 208 nt.u.negTokenResp.mechListMIC = NULL; 209 } 210 211 /* 212 * If this is NTLM we have negotiated, don't include the negResult 213 * since Samba 3.0.28a (Mac OS X SnowLeopard) can't handle them. 214 * 215 * But since we need accept_completed for modern windows that uses 216 * MIC, we need send this for NTLM, only do that when we are a 217 * session that is not accept_completed. 218 */ 219 220 if (gss_oid_equal(ctx->negotiated_mech_type, GSS_NTLM_MECHANISM) == 0) { 221 222 ALLOC(nt.u.negTokenResp.negResult, 1); 223 if (nt.u.negTokenResp.negResult == NULL) { 224 free_NegotiationToken(&nt); 225 *minor_status = ENOMEM; 226 return GSS_S_FAILURE; 227 } 228 *nt.u.negTokenResp.negResult = result; 229 } 230 231 ASN1_MALLOC_ENCODE(NegotiationToken, 232 output_token->value, output_token->length, 233 &nt, &size, ret); 234 free_NegotiationToken(&nt); 235 if (ret) { 236 *minor_status = ret; 237 return GSS_S_FAILURE; 238 } 239 240 if (result != accept_completed) 241 return GSS_S_CONTINUE_NEEDED; 242 243 _gss_spnego_fixup_ntlm(ctx); 244 245 return GSS_S_COMPLETE; 246} 247 248static OM_uint32 249spnego_initial(OM_uint32 * minor_status, 250 gss_cred_id_t cred, 251 gssspnego_ctx ctx, 252 const gss_name_t target_name, 253 const gss_OID mech_type, 254 OM_uint32 req_flags, 255 OM_uint32 time_req, 256 const gss_channel_bindings_t input_chan_bindings, 257 const gss_buffer_t input_token, 258 gss_buffer_t output_token, 259 OM_uint32 * ret_flags, 260 OM_uint32 * time_rec) 261{ 262 NegotiationToken nt; 263 int ret; 264 OM_uint32 sub, minor; 265 gss_buffer_desc mech_token; 266 size_t size; 267 gss_buffer_desc data; 268 spnego_name name = (spnego_name)target_name; 269 struct mech_selection sel; 270 271 *minor_status = 0; 272 273 memset (&nt, 0, sizeof(nt)); 274 275 if (target_name == GSS_C_NO_NAME) 276 return GSS_S_BAD_NAME; 277 278 ctx->flags.local = 1; 279 280 sub = gss_import_name(&minor, &name->value, &name->type, &ctx->target_name); 281 if (GSS_ERROR(sub)) { 282 *minor_status = minor; 283 return sub; 284 } 285 286 nt.element = choice_NegotiationToken_negTokenInit; 287 288 memset(&sel, 0, sizeof(sel)); 289 290 sel.target_name = ctx->target_name; 291 sel.preferred_mech_type = GSS_C_NO_OID; 292 sel.req_flags = req_flags; 293 sel.time_req = time_req; 294 sel.input_chan_bindings = (gss_channel_bindings_t)input_chan_bindings; 295 296 sub = _gss_spnego_indicate_mechtypelist(&minor, 297 ctx->target_name, 298 initiator_approved, 299 &sel, 300 0, 301 cred, 302 &nt.u.negTokenInit.mechTypes, 303 &ctx->preferred_mech_type); 304 if (GSS_ERROR(sub)) { 305 *minor_status = minor; 306 return sub; 307 } 308 309 nt.u.negTokenInit.reqFlags = NULL; 310 311 if (sel.gssctx == NULL) { 312 free_NegotiationToken(&nt); 313 *minor_status = 0; 314 return gss_mg_set_error_string(GSS_C_NO_OID, GSS_S_NO_CONTEXT, 0, 315 "SPNEGO could not find a prefered mechanism"); 316 } 317 318 /* optimistic token from selection context */ 319 mech_token = sel.optimistic_token; 320 ctx->mech_flags = sel.optimistic_flags; 321 ctx->negotiated_mech_type = sel.negotiated_mech_type; 322 ctx->negotiated_ctx_id = sel.gssctx; 323 ctx->flags.maybe_open = sel.complete; 324 325 if (mech_token.length != 0) { 326 ALLOC(nt.u.negTokenInit.mechToken, 1); 327 if (nt.u.negTokenInit.mechToken == NULL) { 328 free_NegotiationToken(&nt); 329 gss_release_buffer(&minor, &mech_token); 330 *minor_status = ENOMEM; 331 return GSS_S_FAILURE; 332 } 333 nt.u.negTokenInit.mechToken->length = mech_token.length; 334 nt.u.negTokenInit.mechToken->data = malloc(mech_token.length); 335 if (nt.u.negTokenInit.mechToken->data == NULL && mech_token.length != 0) { 336 free_NegotiationToken(&nt); 337 gss_release_buffer(&minor, &mech_token); 338 *minor_status = ENOMEM; 339 return GSS_S_FAILURE; 340 } 341 memcpy(nt.u.negTokenInit.mechToken->data, mech_token.value, mech_token.length); 342 gss_release_buffer(&minor, &mech_token); 343 } else 344 nt.u.negTokenInit.mechToken = NULL; 345 346 nt.u.negTokenInit.mechListMIC = NULL; 347 348 { 349 MechTypeList mt; 350 351 mt.len = nt.u.negTokenInit.mechTypes.len; 352 mt.val = nt.u.negTokenInit.mechTypes.val; 353 354 ASN1_MALLOC_ENCODE(MechTypeList, 355 ctx->NegTokenInit_mech_types.value, 356 ctx->NegTokenInit_mech_types.length, 357 &mt, &size, ret); 358 if (ret) { 359 *minor_status = ret; 360 free_NegotiationToken(&nt); 361 return GSS_S_FAILURE; 362 } 363 //XXX heim_assert(ctx->NegTokenInit_mech_types.length == size, "asn1 internal error"); 364 } 365 366 ASN1_MALLOC_ENCODE(NegotiationToken, data.value, data.length, &nt, &size, ret); 367 free_NegotiationToken(&nt); 368 if (ret) { 369 return GSS_S_FAILURE; 370 } 371 if (data.length != size) 372 abort(); 373 374 sub = gss_encapsulate_token(&data, 375 GSS_SPNEGO_MECHANISM, 376 output_token); 377 free (data.value); 378 379 if (sub) { 380 return sub; 381 } 382 383 if (ret_flags) 384 *ret_flags = ctx->mech_flags; 385 if (time_rec) 386 *time_rec = ctx->mech_time_rec; 387 388 ctx->initiator_state = spnego_reply; 389 390 return GSS_S_CONTINUE_NEEDED; 391} 392 393/* 394 * 395 */ 396 397static OM_uint32 398spnego_reply(OM_uint32 * minor_status, 399 const gss_cred_id_t cred, 400 gssspnego_ctx ctx, 401 const gss_name_t target_name, 402 const gss_OID mech_type, 403 OM_uint32 req_flags, 404 OM_uint32 time_req, 405 const gss_channel_bindings_t input_chan_bindings, 406 const gss_buffer_t input_token, 407 gss_buffer_t output_token, 408 OM_uint32 * ret_flags, 409 OM_uint32 * time_rec) 410{ 411 OM_uint32 ret, minor; 412 NegotiationToken resp; 413 gss_buffer_desc mech_output_token; 414 415 *minor_status = 0; 416 417 output_token->length = 0; 418 output_token->value = NULL; 419 420 mech_output_token.length = 0; 421 mech_output_token.value = NULL; 422 423 ret = decode_NegotiationToken(input_token->value, input_token->length, 424 &resp, NULL); 425 if (ret) 426 return ret; 427 428 if (resp.element != choice_NegotiationToken_negTokenResp) { 429 free_NegotiationToken(&resp); 430 *minor_status = 0; 431 return GSS_S_BAD_MECH; 432 } 433 434 if (resp.u.negTokenResp.negResult == NULL 435 || *resp.u.negTokenResp.negResult == reject) 436 { 437 free_NegotiationToken(&resp); 438 return GSS_S_BAD_MECH; 439 } 440 441 /* 442 * Pick up the mechanism that the acceptor selected, only allow it 443 * to be sent in packet. 444 */ 445 446 if (resp.u.negTokenResp.supportedMech || ctx->flags.seen_supported_mech == 0) { 447 gss_OID_desc oid; 448 size_t len; 449 450 ctx->flags.seen_supported_mech = 1; 451 452 oid.length = (OM_uint32)der_length_oid(resp.u.negTokenResp.supportedMech); 453 oid.elements = malloc(oid.length); 454 if (oid.elements == NULL) { 455 free_NegotiationToken(&resp); 456 return GSS_S_BAD_MECH; 457 } 458 ret = der_put_oid(((uint8_t *)oid.elements) + oid.length - 1, 459 oid.length, 460 resp.u.negTokenResp.supportedMech, 461 &len); 462 if (ret || len != oid.length) { 463 free(oid.elements); 464 free_NegotiationToken(&resp); 465 return GSS_S_BAD_MECH; 466 } 467 468 if (gss_oid_equal(GSS_SPNEGO_MECHANISM, &oid)) { 469 free(oid.elements); 470 free_NegotiationToken(&resp); 471 return GSS_S_BAD_MECH; 472 } 473 474 /* check if the acceptor took our optimistic token */ 475 if (!gss_oid_equal(ctx->preferred_mech_type, &oid) && 476 (!gss_oid_equal(ctx->preferred_mech_type, GSS_KRB5_MECHANISM) || 477 !gss_oid_equal(&oid, &_gss_spnego_mskrb_mechanism_oid_desc))) 478 { 479 /* nope, lets start over */ 480 free(oid.elements); 481 gss_delete_sec_context(&minor, &ctx->negotiated_ctx_id, 482 GSS_C_NO_BUFFER); 483 ctx->negotiated_ctx_id = GSS_C_NO_CONTEXT; 484 } else { 485 gss_duplicate_oid(minor_status, &oid, &ctx->selected_mech_type); 486 free(oid.elements); 487 } 488 489 } else if (!ctx->flags.seen_supported_mech) { 490 free_NegotiationToken(&resp); 491 return gss_mg_set_error_string(GSS_SPNEGO_MECHANISM, 492 GSS_S_BAD_MECH, (*minor_status = EINVAL), 493 "SPNEGO acceptor didn't send supportedMech"); 494 } 495 496 /* if a token (of non zero length), or no context, pass to underlaying mech */ 497 if ((resp.u.negTokenResp.responseToken != NULL && resp.u.negTokenResp.responseToken->length) || 498 ctx->negotiated_ctx_id == GSS_C_NO_CONTEXT) { 499 gss_buffer_desc mech_input_token; 500 501 if (resp.u.negTokenResp.responseToken) { 502 mech_input_token.length = resp.u.negTokenResp.responseToken->length; 503 mech_input_token.value = resp.u.negTokenResp.responseToken->data; 504 } else { 505 mech_input_token.length = 0; 506 mech_input_token.value = NULL; 507 } 508 509 /* Fall through as if the negotiated mechanism 510 was requested explicitly */ 511 ret = gss_init_sec_context(&minor, 512 cred, 513 &ctx->negotiated_ctx_id, 514 ctx->target_name, 515 ctx->selected_mech_type, 516 req_flags, 517 time_req, 518 input_chan_bindings, 519 &mech_input_token, 520 &ctx->negotiated_mech_type, 521 &mech_output_token, 522 &ctx->mech_flags, 523 &ctx->mech_time_rec); 524 if (GSS_ERROR(ret)) { 525 free_NegotiationToken(&resp); 526 gss_mg_collect_error(ctx->selected_mech_type, ret, minor); 527 *minor_status = minor; 528 return ret; 529 } 530 if (ret == GSS_S_COMPLETE) { 531 ctx->flags.open = 1; 532 } 533 } else if (*resp.u.negTokenResp.negResult == accept_completed) { 534 if (ctx->flags.maybe_open) 535 ctx->flags.open = 1; 536 } 537 538 if (*resp.u.negTokenResp.negResult == request_mic) { 539 ctx->flags.peer_require_mic = 1; 540 } 541 542 if (ctx->flags.open && ctx->flags.verified_mic == 0) { 543 544 /* 545 * Verify the mechListMIC if CFX was used and a non-preferred 546 * mechanism was selected. 547 */ 548 ctx->flags.require_mic = _gss_spnego_require_mechlist_mic(ctx); 549 550 /* 551 * If the peer sent mechListMIC, require it to verify ... 552 */ 553 if (resp.u.negTokenResp.mechListMIC) { 554 heim_octet_string *m = resp.u.negTokenResp.mechListMIC; 555 556 ctx->flags.require_mic = 1; 557 558 /* ...unless its a windows 2000 server that sends the 559 * responseToken inside the mechListMIC too. We only 560 * accept this condition if would have been safe to omit 561 * anyway. */ 562 563 if (ctx->flags.safe_omit 564 && resp.u.negTokenResp.responseToken 565 && der_heim_octet_string_cmp(m, resp.u.negTokenResp.responseToken) == 0) 566 { 567 ctx->flags.require_mic = 0; 568 } 569 } 570 571 } else { 572 ctx->flags.require_mic = 0; 573 } 574 575 /* 576 * If we are supposed to check mic and have it, force checking now. 577 */ 578 579 if (ctx->flags.require_mic && resp.u.negTokenResp.mechListMIC) { 580 581 ret = _gss_spnego_verify_mechtypes_mic(minor_status, ctx, 582 resp.u.negTokenResp.mechListMIC); 583 if (ret) { 584 free_NegotiationToken(&resp); 585 return ret; 586 } 587 } 588 589 /* 590 * Now that underlaying mech is open (conncted), we can figure out 591 * what nexd step to go to. 592 */ 593 594 if (ctx->flags.open) { 595 596 if (*resp.u.negTokenResp.negResult == accept_completed && ctx->flags.safe_omit) { 597 ctx->initiator_state = step_completed; 598 ret = GSS_S_COMPLETE; 599 } else if (ctx->flags.require_mic != 0 && ctx->flags.verified_mic == 0) { 600 ctx->initiator_state = wait_server_mic; 601 ret = GSS_S_CONTINUE_NEEDED; 602 } else { 603 ctx->initiator_state = step_completed; 604 ret = GSS_S_COMPLETE; 605 } 606 } 607 608 if (*resp.u.negTokenResp.negResult != accept_completed || 609 ctx->initiator_state != step_completed || 610 mech_output_token.length) 611 { 612 OM_uint32 ret2; 613 ret2 = make_reply(minor_status, ctx, 614 &mech_output_token, 615 output_token); 616 if (ret2) 617 ret = ret2; 618 } 619 620 free_NegotiationToken(&resp); 621 622 gss_release_buffer(&minor, &mech_output_token); 623 624 if (ret_flags) 625 *ret_flags = ctx->mech_flags; 626 if (time_rec) 627 *time_rec = ctx->mech_time_rec; 628 629 return ret; 630} 631 632static OM_uint32 633wait_server_mic(OM_uint32 * minor_status, 634 const gss_cred_id_t cred, 635 gssspnego_ctx ctx, 636 const gss_name_t target_name, 637 const gss_OID mech_type, 638 OM_uint32 req_flags, 639 OM_uint32 time_req, 640 const gss_channel_bindings_t input_chan_bindings, 641 const gss_buffer_t input_token, 642 gss_buffer_t output_token, 643 OM_uint32 * ret_flags, 644 OM_uint32 * time_rec) 645{ 646 OM_uint32 major_status; 647 NegotiationToken resp; 648 int ret; 649 650 ret = decode_NegotiationToken(input_token->value, input_token->length, &resp, NULL); 651 if (ret) 652 return gss_mg_set_error_string(GSS_SPNEGO_MECHANISM, 653 GSS_S_BAD_MECH, ret, 654 "Failed to decode NegotiationToken"); 655 656 if (resp.element != choice_NegotiationToken_negTokenResp 657 || resp.u.negTokenResp.negResult == NULL 658 || *resp.u.negTokenResp.negResult != accept_completed) 659 { 660 free_NegotiationToken(&resp); 661 return gss_mg_set_error_string(GSS_SPNEGO_MECHANISM, 662 GSS_S_BAD_MECH, (*minor_status = EINVAL), 663 "NegToken not accept_completed"); 664 } 665 666 if (resp.u.negTokenResp.mechListMIC) { 667 major_status = _gss_spnego_verify_mechtypes_mic(minor_status, ctx, 668 resp.u.negTokenResp.mechListMIC); 669 } else if (ctx->flags.safe_omit == 0) { 670 free_NegotiationToken(&resp); 671 return gss_mg_set_error_string(GSS_SPNEGO_MECHANISM, 672 GSS_S_BAD_MECH, (*minor_status = EINVAL), 673 "Waiting for MIC, but its missing in server request"); 674 } else { 675 major_status = GSS_S_COMPLETE; 676 } 677 678 free_NegotiationToken(&resp); 679 if (major_status != GSS_S_COMPLETE) 680 return major_status; 681 682 ctx->flags.verified_mic = 1; 683 ctx->initiator_state = step_completed; 684 685 if (ret_flags) 686 *ret_flags = ctx->mech_flags; 687 if (time_rec) 688 *time_rec = ctx->mech_time_rec; 689 690 *minor_status = 0; 691 return GSS_S_COMPLETE; 692} 693 694static OM_uint32 695step_completed(OM_uint32 * minor_status, 696 gss_cred_id_t cred, 697 gssspnego_ctx ctx, 698 gss_name_t name, 699 const gss_OID mech_type, 700 OM_uint32 req_flags, 701 OM_uint32 time_req, 702 const gss_channel_bindings_t input_chan_bindings, 703 const gss_buffer_t input_token, 704 gss_buffer_t output_token, 705 OM_uint32 * ret_flags, 706 OM_uint32 * time_rec) 707{ 708 return gss_mg_set_error_string(GSS_SPNEGO_MECHANISM, 709 GSS_S_BAD_STATUS, (*minor_status = EINVAL), 710 "SPNEGO called got ISC call one too many"); 711} 712 713 714OM_uint32 715_gss_spnego_init_sec_context(OM_uint32 * minor_status, 716 const gss_cred_id_t initiator_cred_handle, 717 gss_ctx_id_t * context_handle, 718 const gss_name_t target_name, 719 const gss_OID mech_type, 720 OM_uint32 req_flags, 721 OM_uint32 time_req, 722 const gss_channel_bindings_t input_chan_bindings, 723 const gss_buffer_t input_token, 724 gss_OID * actual_mech_type, 725 gss_buffer_t output_token, 726 OM_uint32 * ret_flags, 727 OM_uint32 * time_rec) 728{ 729 gssspnego_ctx ctx; 730 OM_uint32 ret; 731 732 if (*context_handle == GSS_C_NO_CONTEXT) { 733 ret = _gss_spnego_alloc_sec_context(minor_status, context_handle); 734 if (GSS_ERROR(ret)) 735 return ret; 736 737 ctx = (gssspnego_ctx)*context_handle; 738 739 ctx->initiator_state = spnego_initial; 740 } else { 741 ctx = (gssspnego_ctx)*context_handle; 742 } 743 744 745 HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex); 746 747 do { 748 ret = ctx->initiator_state(minor_status, initiator_cred_handle, ctx, target_name, 749 mech_type, req_flags, time_req, input_chan_bindings, input_token, 750 output_token, ret_flags, time_rec); 751 752 } while (ret == GSS_S_COMPLETE && 753 ctx->initiator_state != step_completed && 754 output_token->length == 0); 755 756 /* destroy context in case of error */ 757 if (GSS_ERROR(ret)) { 758 OM_uint32 junk; 759 _gss_spnego_internal_delete_sec_context(&junk, context_handle, GSS_C_NO_BUFFER); 760 } else { 761 762 HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex); 763 764 if (actual_mech_type) 765 *actual_mech_type = ctx->negotiated_mech_type; 766 } 767 768 return ret; 769} 770 771