1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 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 "krb5_locl.h" 35 36 RCSID("$Id: get_in_tkt.c,v 1.103 2002/01/06 23:10:06 assar Exp $"); 37 38 krb5_error_code 39 krb5_init_etype (krb5_context context, 40 unsigned *len, 41 krb5_enctype **val, 42 const krb5_enctype *etypes) 43 { 44 int i; 45 krb5_error_code ret; 46 krb5_enctype *tmp; 47 48 ret = 0; 49 if (etypes) 50 tmp = (krb5_enctype*)etypes; 51 else { 52 ret = krb5_get_default_in_tkt_etypes(context, 53 &tmp); 54 if (ret) 55 return ret; 56 } 57 58 for (i = 0; tmp[i]; ++i) 59 ; 60 *len = i; 61 *val = malloc(i * sizeof(**val)); 62 if (i != 0 && *val == NULL) { 63 ret = ENOMEM; 64 krb5_set_error_string(context, "malloc: out of memory"); 65 goto cleanup; 66 } 67 memmove (*val, 68 tmp, 69 i * sizeof(*tmp)); 70 cleanup: 71 if (etypes == NULL) 72 free (tmp); 73 return ret; 74 } 75 76 77 static krb5_error_code 78 decrypt_tkt (krb5_context context, 79 krb5_keyblock *key, 80 krb5_key_usage usage, 81 krb5_const_pointer decrypt_arg, 82 krb5_kdc_rep *dec_rep) 83 { 84 krb5_error_code ret; 85 krb5_data data; 86 size_t size; 87 krb5_crypto crypto; 88 89 ret = krb5_crypto_init(context, key, 0, &crypto); 90 if (ret) 91 return ret; 92 93 ret = krb5_decrypt_EncryptedData (context, 94 crypto, 95 usage, 96 &dec_rep->kdc_rep.enc_part, 97 &data); 98 krb5_crypto_destroy(context, crypto); 99 100 if (ret) 101 return ret; 102 103 ret = krb5_decode_EncASRepPart(context, 104 data.data, 105 data.length, 106 &dec_rep->enc_part, 107 &size); 108 if (ret) 109 ret = krb5_decode_EncTGSRepPart(context, 110 data.data, 111 data.length, 112 &dec_rep->enc_part, 113 &size); 114 krb5_data_free (&data); 115 if (ret) 116 return ret; 117 return 0; 118 } 119 120 int 121 _krb5_extract_ticket(krb5_context context, 122 krb5_kdc_rep *rep, 123 krb5_creds *creds, 124 krb5_keyblock *key, 125 krb5_const_pointer keyseed, 126 krb5_key_usage key_usage, 127 krb5_addresses *addrs, 128 unsigned nonce, 129 krb5_boolean allow_server_mismatch, 130 krb5_boolean ignore_cname, 131 krb5_decrypt_proc decrypt_proc, 132 krb5_const_pointer decryptarg) 133 { 134 krb5_error_code ret; 135 krb5_principal tmp_principal; 136 int tmp; 137 time_t tmp_time; 138 krb5_timestamp sec_now; 139 140 ret = principalname2krb5_principal (&tmp_principal, 141 rep->kdc_rep.cname, 142 rep->kdc_rep.crealm); 143 if (ret) 144 goto out; 145 146 /* compare client */ 147 148 if (!ignore_cname) { 149 tmp = krb5_principal_compare (context, tmp_principal, creds->client); 150 if (!tmp) { 151 krb5_free_principal (context, tmp_principal); 152 krb5_clear_error_string (context); 153 ret = KRB5KRB_AP_ERR_MODIFIED; 154 goto out; 155 } 156 } 157 158 krb5_free_principal (context, creds->client); 159 creds->client = tmp_principal; 160 161 /* extract ticket */ 162 { 163 unsigned char *buf; 164 size_t len; 165 len = length_Ticket(&rep->kdc_rep.ticket); 166 buf = malloc(len); 167 if(buf == NULL) { 168 krb5_set_error_string(context, "malloc: out of memory"); 169 ret = ENOMEM; 170 goto out; 171 } 172 encode_Ticket(buf + len - 1, len, &rep->kdc_rep.ticket, &len); 173 creds->ticket.data = buf; 174 creds->ticket.length = len; 175 creds->second_ticket.length = 0; 176 creds->second_ticket.data = NULL; 177 } 178 179 /* compare server */ 180 181 ret = principalname2krb5_principal (&tmp_principal, 182 rep->kdc_rep.ticket.sname, 183 rep->kdc_rep.ticket.realm); 184 if (ret) 185 goto out; 186 if(allow_server_mismatch){ 187 krb5_free_principal(context, creds->server); 188 creds->server = tmp_principal; 189 tmp_principal = NULL; 190 }else{ 191 tmp = krb5_principal_compare (context, tmp_principal, creds->server); 192 krb5_free_principal (context, tmp_principal); 193 if (!tmp) { 194 ret = KRB5KRB_AP_ERR_MODIFIED; 195 krb5_clear_error_string (context); 196 goto out; 197 } 198 } 199 200 /* decrypt */ 201 202 if (decrypt_proc == NULL) 203 decrypt_proc = decrypt_tkt; 204 205 ret = (*decrypt_proc)(context, key, key_usage, decryptarg, rep); 206 if (ret) 207 goto out; 208 209 #if 0 210 /* XXX should this decode be here, or in the decrypt_proc? */ 211 ret = krb5_decode_keyblock(context, &rep->enc_part.key, 1); 212 if(ret) 213 goto out; 214 #endif 215 216 /* compare nonces */ 217 218 if (nonce != rep->enc_part.nonce) { 219 ret = KRB5KRB_AP_ERR_MODIFIED; 220 krb5_set_error_string(context, "malloc: out of memory"); 221 goto out; 222 } 223 224 /* set kdc-offset */ 225 226 krb5_timeofday (context, &sec_now); 227 if (context->kdc_sec_offset == 0 228 && krb5_config_get_bool (context, NULL, 229 "libdefaults", 230 "kdc_timesync", 231 NULL)) { 232 context->kdc_sec_offset = rep->enc_part.authtime - sec_now; 233 krb5_timeofday (context, &sec_now); 234 } 235 236 /* check all times */ 237 238 if (rep->enc_part.starttime) { 239 tmp_time = *rep->enc_part.starttime; 240 } else 241 tmp_time = rep->enc_part.authtime; 242 243 if (creds->times.starttime == 0 244 && abs(tmp_time - sec_now) > context->max_skew) { 245 ret = KRB5KRB_AP_ERR_SKEW; 246 krb5_set_error_string (context, 247 "time skew (%d) larger than max (%d)", 248 abs(tmp_time - sec_now), 249 (int)context->max_skew); 250 goto out; 251 } 252 253 if (creds->times.starttime != 0 254 && tmp_time != creds->times.starttime) { 255 krb5_clear_error_string (context); 256 ret = KRB5KRB_AP_ERR_MODIFIED; 257 goto out; 258 } 259 260 creds->times.starttime = tmp_time; 261 262 if (rep->enc_part.renew_till) { 263 tmp_time = *rep->enc_part.renew_till; 264 } else 265 tmp_time = 0; 266 267 if (creds->times.renew_till != 0 268 && tmp_time > creds->times.renew_till) { 269 krb5_clear_error_string (context); 270 ret = KRB5KRB_AP_ERR_MODIFIED; 271 goto out; 272 } 273 274 creds->times.renew_till = tmp_time; 275 276 creds->times.authtime = rep->enc_part.authtime; 277 278 if (creds->times.endtime != 0 279 && rep->enc_part.endtime > creds->times.endtime) { 280 krb5_clear_error_string (context); 281 ret = KRB5KRB_AP_ERR_MODIFIED; 282 goto out; 283 } 284 285 creds->times.endtime = rep->enc_part.endtime; 286 287 if(rep->enc_part.caddr) 288 krb5_copy_addresses (context, rep->enc_part.caddr, &creds->addresses); 289 else if(addrs) 290 krb5_copy_addresses (context, addrs, &creds->addresses); 291 else { 292 creds->addresses.len = 0; 293 creds->addresses.val = NULL; 294 } 295 creds->flags.b = rep->enc_part.flags; 296 297 creds->authdata.len = 0; 298 creds->authdata.val = NULL; 299 creds->session.keyvalue.length = 0; 300 creds->session.keyvalue.data = NULL; 301 creds->session.keytype = rep->enc_part.key.keytype; 302 ret = krb5_data_copy (&creds->session.keyvalue, 303 rep->enc_part.key.keyvalue.data, 304 rep->enc_part.key.keyvalue.length); 305 306 out: 307 memset (rep->enc_part.key.keyvalue.data, 0, 308 rep->enc_part.key.keyvalue.length); 309 return ret; 310 } 311 312 313 static krb5_error_code 314 make_pa_enc_timestamp(krb5_context context, PA_DATA *pa, 315 krb5_enctype etype, krb5_keyblock *key) 316 { 317 PA_ENC_TS_ENC p; 318 u_char buf[1024]; 319 size_t len; 320 EncryptedData encdata; 321 krb5_error_code ret; 322 int32_t sec, usec; 323 int usec2; 324 krb5_crypto crypto; 325 326 krb5_us_timeofday (context, &sec, &usec); 327 p.patimestamp = sec; 328 usec2 = usec; 329 p.pausec = &usec2; 330 331 ret = encode_PA_ENC_TS_ENC(buf + sizeof(buf) - 1, 332 sizeof(buf), 333 &p, 334 &len); 335 if (ret) 336 return ret; 337 338 ret = krb5_crypto_init(context, key, 0, &crypto); 339 if (ret) 340 return ret; 341 ret = krb5_encrypt_EncryptedData(context, 342 crypto, 343 KRB5_KU_PA_ENC_TIMESTAMP, 344 buf + sizeof(buf) - len, 345 len, 346 0, 347 &encdata); 348 krb5_crypto_destroy(context, crypto); 349 if (ret) 350 return ret; 351 352 ret = encode_EncryptedData(buf + sizeof(buf) - 1, 353 sizeof(buf), 354 &encdata, 355 &len); 356 free_EncryptedData(&encdata); 357 if (ret) 358 return ret; 359 pa->padata_type = KRB5_PADATA_ENC_TIMESTAMP; 360 pa->padata_value.length = 0; 361 krb5_data_copy(&pa->padata_value, 362 buf + sizeof(buf) - len, 363 len); 364 return 0; 365 } 366 367 static krb5_error_code 368 add_padata(krb5_context context, 369 METHOD_DATA *md, 370 krb5_principal client, 371 krb5_key_proc key_proc, 372 krb5_const_pointer keyseed, 373 krb5_enctype *enctypes, 374 unsigned netypes, 375 krb5_salt *salt) 376 { 377 krb5_error_code ret; 378 PA_DATA *pa2; 379 krb5_salt salt2; 380 krb5_enctype *ep; 381 int i; 382 383 if(salt == NULL) { 384 /* default to standard salt */ 385 ret = krb5_get_pw_salt (context, client, &salt2); 386 salt = &salt2; 387 } 388 if (!enctypes) { 389 enctypes = context->etypes; 390 netypes = 0; 391 for (ep = enctypes; *ep != ETYPE_NULL; ep++) 392 netypes++; 393 } 394 pa2 = realloc (md->val, (md->len + netypes) * sizeof(*md->val)); 395 if (pa2 == NULL) { 396 krb5_set_error_string(context, "malloc: out of memory"); 397 return ENOMEM; 398 } 399 md->val = pa2; 400 401 for (i = 0; i < netypes; ++i) { 402 krb5_keyblock *key; 403 404 ret = (*key_proc)(context, enctypes[i], *salt, keyseed, &key); 405 if (ret) 406 continue; 407 ret = make_pa_enc_timestamp (context, &md->val[md->len], 408 enctypes[i], key); 409 krb5_free_keyblock (context, key); 410 if (ret) 411 return ret; 412 ++md->len; 413 } 414 if(salt == &salt2) 415 krb5_free_salt(context, salt2); 416 return 0; 417 } 418 419 static krb5_error_code 420 init_as_req (krb5_context context, 421 krb5_kdc_flags opts, 422 krb5_creds *creds, 423 const krb5_addresses *addrs, 424 const krb5_enctype *etypes, 425 const krb5_preauthtype *ptypes, 426 const krb5_preauthdata *preauth, 427 krb5_key_proc key_proc, 428 krb5_const_pointer keyseed, 429 unsigned nonce, 430 AS_REQ *a) 431 { 432 krb5_error_code ret; 433 krb5_salt salt; 434 435 memset(a, 0, sizeof(*a)); 436 437 a->pvno = 5; 438 a->msg_type = krb_as_req; 439 a->req_body.kdc_options = opts.b; 440 a->req_body.cname = malloc(sizeof(*a->req_body.cname)); 441 if (a->req_body.cname == NULL) { 442 ret = ENOMEM; 443 krb5_set_error_string(context, "malloc: out of memory"); 444 goto fail; 445 } 446 a->req_body.sname = malloc(sizeof(*a->req_body.sname)); 447 if (a->req_body.sname == NULL) { 448 ret = ENOMEM; 449 krb5_set_error_string(context, "malloc: out of memory"); 450 goto fail; 451 } 452 ret = krb5_principal2principalname (a->req_body.cname, creds->client); 453 if (ret) 454 goto fail; 455 ret = krb5_principal2principalname (a->req_body.sname, creds->server); 456 if (ret) 457 goto fail; 458 ret = copy_Realm(&creds->client->realm, &a->req_body.realm); 459 if (ret) 460 goto fail; 461 462 if(creds->times.starttime) { 463 a->req_body.from = malloc(sizeof(*a->req_body.from)); 464 if (a->req_body.from == NULL) { 465 ret = ENOMEM; 466 krb5_set_error_string(context, "malloc: out of memory"); 467 goto fail; 468 } 469 *a->req_body.from = creds->times.starttime; 470 } 471 if(creds->times.endtime){ 472 ALLOC(a->req_body.till, 1); 473 *a->req_body.till = creds->times.endtime; 474 } 475 if(creds->times.renew_till){ 476 a->req_body.rtime = malloc(sizeof(*a->req_body.rtime)); 477 if (a->req_body.rtime == NULL) { 478 ret = ENOMEM; 479 krb5_set_error_string(context, "malloc: out of memory"); 480 goto fail; 481 } 482 *a->req_body.rtime = creds->times.renew_till; 483 } 484 a->req_body.nonce = nonce; 485 ret = krb5_init_etype (context, 486 &a->req_body.etype.len, 487 &a->req_body.etype.val, 488 etypes); 489 if (ret) 490 goto fail; 491 492 /* 493 * This means no addresses 494 */ 495 496 if (addrs && addrs->len == 0) { 497 a->req_body.addresses = NULL; 498 } else { 499 a->req_body.addresses = malloc(sizeof(*a->req_body.addresses)); 500 if (a->req_body.addresses == NULL) { 501 ret = ENOMEM; 502 krb5_set_error_string(context, "malloc: out of memory"); 503 goto fail; 504 } 505 506 if (addrs) 507 ret = krb5_copy_addresses(context, addrs, a->req_body.addresses); 508 else { 509 ret = krb5_get_all_client_addrs (context, a->req_body.addresses); 510 if(ret == 0 && a->req_body.addresses->len == 0) { 511 free(a->req_body.addresses); 512 a->req_body.addresses = NULL; 513 } 514 } 515 if (ret) 516 return ret; 517 } 518 519 a->req_body.enc_authorization_data = NULL; 520 a->req_body.additional_tickets = NULL; 521 522 if(preauth != NULL) { 523 int i; 524 ALLOC(a->padata, 1); 525 if(a->padata == NULL) { 526 ret = ENOMEM; 527 krb5_set_error_string(context, "malloc: out of memory"); 528 goto fail; 529 } 530 for(i = 0; i < preauth->len; i++) { 531 if(preauth->val[i].type == KRB5_PADATA_ENC_TIMESTAMP){ 532 int j; 533 PA_DATA *tmp = realloc(a->padata->val, 534 (a->padata->len + 535 preauth->val[i].info.len) * 536 sizeof(*a->padata->val)); 537 if(tmp == NULL) { 538 ret = ENOMEM; 539 krb5_set_error_string(context, "malloc: out of memory"); 540 goto fail; 541 } 542 a->padata->val = tmp; 543 for(j = 0; j < preauth->val[i].info.len; j++) { 544 krb5_salt *sp = &salt; 545 if(preauth->val[i].info.val[j].salttype) 546 salt.salttype = *preauth->val[i].info.val[j].salttype; 547 else 548 salt.salttype = KRB5_PW_SALT; 549 if(preauth->val[i].info.val[j].salt) 550 salt.saltvalue = *preauth->val[i].info.val[j].salt; 551 else 552 if(salt.salttype == KRB5_PW_SALT) 553 sp = NULL; 554 else 555 krb5_data_zero(&salt.saltvalue); 556 add_padata(context, a->padata, creds->client, 557 key_proc, keyseed, 558 &preauth->val[i].info.val[j].etype, 1, 559 sp); 560 } 561 } 562 } 563 } else 564 /* not sure this is the way to use `ptypes' */ 565 if (ptypes == NULL || *ptypes == KRB5_PADATA_NONE) 566 a->padata = NULL; 567 else if (*ptypes == KRB5_PADATA_ENC_TIMESTAMP) { 568 ALLOC(a->padata, 1); 569 if (a->padata == NULL) { 570 ret = ENOMEM; 571 krb5_set_error_string(context, "malloc: out of memory"); 572 goto fail; 573 } 574 a->padata->len = 0; 575 a->padata->val = NULL; 576 577 /* make a v5 salted pa-data */ 578 add_padata(context, a->padata, creds->client, 579 key_proc, keyseed, a->req_body.etype.val, 580 a->req_body.etype.len, NULL); 581 582 /* make a v4 salted pa-data */ 583 salt.salttype = KRB5_PW_SALT; 584 krb5_data_zero(&salt.saltvalue); 585 add_padata(context, a->padata, creds->client, 586 key_proc, keyseed, a->req_body.etype.val, 587 a->req_body.etype.len, &salt); 588 } else { 589 krb5_set_error_string (context, "pre-auth type %d not supported", 590 *ptypes); 591 ret = KRB5_PREAUTH_BAD_TYPE; 592 goto fail; 593 } 594 return 0; 595 fail: 596 free_AS_REQ(a); 597 return ret; 598 } 599 600 static int 601 set_ptypes(krb5_context context, 602 KRB_ERROR *error, 603 krb5_preauthtype **ptypes, 604 krb5_preauthdata **preauth) 605 { 606 static krb5_preauthdata preauth2; 607 static krb5_preauthtype ptypes2[] = { KRB5_PADATA_ENC_TIMESTAMP, KRB5_PADATA_NONE }; 608 609 if(error->e_data) { 610 METHOD_DATA md; 611 int i; 612 decode_METHOD_DATA(error->e_data->data, 613 error->e_data->length, 614 &md, 615 NULL); 616 for(i = 0; i < md.len; i++){ 617 switch(md.val[i].padata_type){ 618 case KRB5_PADATA_ENC_TIMESTAMP: 619 *ptypes = ptypes2; 620 break; 621 case KRB5_PADATA_ETYPE_INFO: 622 *preauth = &preauth2; 623 ALLOC_SEQ(*preauth, 1); 624 (*preauth)->val[0].type = KRB5_PADATA_ENC_TIMESTAMP; 625 krb5_decode_ETYPE_INFO(context, 626 md.val[i].padata_value.data, 627 md.val[i].padata_value.length, 628 &(*preauth)->val[0].info, 629 NULL); 630 break; 631 default: 632 break; 633 } 634 } 635 free_METHOD_DATA(&md); 636 } else { 637 *ptypes = ptypes2; 638 } 639 return(1); 640 } 641 642 krb5_error_code 643 krb5_get_in_cred(krb5_context context, 644 krb5_flags options, 645 const krb5_addresses *addrs, 646 const krb5_enctype *etypes, 647 const krb5_preauthtype *ptypes, 648 const krb5_preauthdata *preauth, 649 krb5_key_proc key_proc, 650 krb5_const_pointer keyseed, 651 krb5_decrypt_proc decrypt_proc, 652 krb5_const_pointer decryptarg, 653 krb5_creds *creds, 654 krb5_kdc_rep *ret_as_reply) 655 { 656 krb5_error_code ret; 657 AS_REQ a; 658 krb5_kdc_rep rep; 659 krb5_data req, resp; 660 char buf[BUFSIZ]; 661 krb5_salt salt; 662 krb5_keyblock *key; 663 size_t size; 664 krb5_kdc_flags opts; 665 PA_DATA *pa; 666 krb5_enctype etype; 667 krb5_preauthdata *my_preauth = NULL; 668 unsigned nonce; 669 int done; 670 671 opts.i = options; 672 673 krb5_generate_random_block (&nonce, sizeof(nonce)); 674 nonce &= 0xffffffff; 675 676 do { 677 done = 1; 678 ret = init_as_req (context, 679 opts, 680 creds, 681 addrs, 682 etypes, 683 ptypes, 684 preauth, 685 key_proc, 686 keyseed, 687 nonce, 688 &a); 689 if (my_preauth) { 690 free_ETYPE_INFO(&my_preauth->val[0].info); 691 free (my_preauth->val); 692 } 693 if (ret) 694 return ret; 695 696 ret = encode_AS_REQ ((unsigned char*)buf + sizeof(buf) - 1, 697 sizeof(buf), 698 &a, 699 &req.length); 700 free_AS_REQ(&a); 701 if (ret) 702 return ret; 703 704 req.data = buf + sizeof(buf) - req.length; 705 706 ret = krb5_sendto_kdc (context, &req, &creds->client->realm, &resp); 707 if (ret) 708 return ret; 709 710 memset (&rep, 0, sizeof(rep)); 711 ret = decode_AS_REP(resp.data, resp.length, &rep.kdc_rep, &size); 712 if(ret) { 713 /* let's try to parse it as a KRB-ERROR */ 714 KRB_ERROR error; 715 int ret2; 716 717 ret2 = krb5_rd_error(context, &resp, &error); 718 if(ret2 && resp.data && ((char*)resp.data)[0] == 4) 719 ret = KRB5KRB_AP_ERR_V4_REPLY; 720 krb5_data_free(&resp); 721 if (ret2 == 0) { 722 ret = krb5_error_from_rd_error(context, &error, creds); 723 /* if no preauth was set and KDC requires it, give it 724 one more try */ 725 if (!ptypes && !preauth 726 && ret == KRB5KDC_ERR_PREAUTH_REQUIRED 727 #if 0 728 || ret == KRB5KDC_ERR_BADOPTION 729 #endif 730 && set_ptypes(context, &error, &ptypes, &my_preauth)) { 731 done = 0; 732 preauth = my_preauth; 733 krb5_free_error_contents(context, &error); 734 krb5_clear_error_string(context); 735 continue; 736 } 737 if(ret_as_reply) 738 ret_as_reply->error = error; 739 else 740 free_KRB_ERROR (&error); 741 return ret; 742 } 743 return ret; 744 } 745 krb5_data_free(&resp); 746 } while(!done); 747 748 pa = NULL; 749 etype = rep.kdc_rep.enc_part.etype; 750 if(rep.kdc_rep.padata){ 751 int index = 0; 752 pa = krb5_find_padata(rep.kdc_rep.padata->val, rep.kdc_rep.padata->len, 753 KRB5_PADATA_PW_SALT, &index); 754 if(pa == NULL) { 755 index = 0; 756 pa = krb5_find_padata(rep.kdc_rep.padata->val, 757 rep.kdc_rep.padata->len, 758 KRB5_PADATA_AFS3_SALT, &index); 759 } 760 } 761 if(pa) { 762 salt.salttype = pa->padata_type; 763 salt.saltvalue = pa->padata_value; 764 765 ret = (*key_proc)(context, etype, salt, keyseed, &key); 766 } else { 767 /* make a v5 salted pa-data */ 768 ret = krb5_get_pw_salt (context, creds->client, &salt); 769 770 if (ret) 771 goto out; 772 ret = (*key_proc)(context, etype, salt, keyseed, &key); 773 krb5_free_salt(context, salt); 774 } 775 if (ret) 776 goto out; 777 778 ret = _krb5_extract_ticket(context, 779 &rep, 780 creds, 781 key, 782 keyseed, 783 KRB5_KU_AS_REP_ENC_PART, 784 NULL, 785 nonce, 786 FALSE, 787 opts.b.request_anonymous, 788 decrypt_proc, 789 decryptarg); 790 memset (key->keyvalue.data, 0, key->keyvalue.length); 791 krb5_free_keyblock_contents (context, key); 792 free (key); 793 794 out: 795 if (ret == 0 && ret_as_reply) 796 *ret_as_reply = rep; 797 else 798 krb5_free_kdc_rep (context, &rep); 799 return ret; 800 } 801 802 krb5_error_code 803 krb5_get_in_tkt(krb5_context context, 804 krb5_flags options, 805 const krb5_addresses *addrs, 806 const krb5_enctype *etypes, 807 const krb5_preauthtype *ptypes, 808 krb5_key_proc key_proc, 809 krb5_const_pointer keyseed, 810 krb5_decrypt_proc decrypt_proc, 811 krb5_const_pointer decryptarg, 812 krb5_creds *creds, 813 krb5_ccache ccache, 814 krb5_kdc_rep *ret_as_reply) 815 { 816 krb5_error_code ret; 817 krb5_kdc_flags opts; 818 opts.i = 0; 819 opts.b = int2KDCOptions(options); 820 821 ret = krb5_get_in_cred (context, 822 opts.i, 823 addrs, 824 etypes, 825 ptypes, 826 NULL, 827 key_proc, 828 keyseed, 829 decrypt_proc, 830 decryptarg, 831 creds, 832 ret_as_reply); 833 if(ret) 834 return ret; 835 ret = krb5_cc_store_cred (context, ccache, creds); 836 krb5_free_creds_contents (context, creds); 837 return ret; 838 } 839