1 /* 2 * Copyright (c) 1997 - 2002 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 1.104 2002/04/18 09:11:39 joda 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 = NULL; 47 48 ret = 0; 49 if (etypes == NULL) { 50 ret = krb5_get_default_in_tkt_etypes(context, 51 &tmp); 52 if (ret) 53 return ret; 54 etypes = tmp; 55 } 56 57 for (i = 0; etypes[i]; ++i) 58 ; 59 *len = i; 60 *val = malloc(i * sizeof(**val)); 61 if (i != 0 && *val == NULL) { 62 ret = ENOMEM; 63 krb5_set_error_string(context, "malloc: out of memory"); 64 goto cleanup; 65 } 66 memmove (*val, 67 etypes, 68 i * sizeof(*tmp)); 69 cleanup: 70 if (tmp != NULL) 71 free (tmp); 72 return ret; 73 } 74 75 76 static krb5_error_code 77 decrypt_tkt (krb5_context context, 78 krb5_keyblock *key, 79 krb5_key_usage usage, 80 krb5_const_pointer decrypt_arg, 81 krb5_kdc_rep *dec_rep) 82 { 83 krb5_error_code ret; 84 krb5_data data; 85 size_t size; 86 krb5_crypto crypto; 87 88 ret = krb5_crypto_init(context, key, 0, &crypto); 89 if (ret) 90 return ret; 91 92 ret = krb5_decrypt_EncryptedData (context, 93 crypto, 94 usage, 95 &dec_rep->kdc_rep.enc_part, 96 &data); 97 krb5_crypto_destroy(context, crypto); 98 99 if (ret) 100 return ret; 101 102 ret = krb5_decode_EncASRepPart(context, 103 data.data, 104 data.length, 105 &dec_rep->enc_part, 106 &size); 107 if (ret) 108 ret = krb5_decode_EncTGSRepPart(context, 109 data.data, 110 data.length, 111 &dec_rep->enc_part, 112 &size); 113 krb5_data_free (&data); 114 if (ret) 115 return ret; 116 return 0; 117 } 118 119 int 120 _krb5_extract_ticket(krb5_context context, 121 krb5_kdc_rep *rep, 122 krb5_creds *creds, 123 krb5_keyblock *key, 124 krb5_const_pointer keyseed, 125 krb5_key_usage key_usage, 126 krb5_addresses *addrs, 127 unsigned nonce, 128 krb5_boolean allow_server_mismatch, 129 krb5_boolean ignore_cname, 130 krb5_decrypt_proc decrypt_proc, 131 krb5_const_pointer decryptarg) 132 { 133 krb5_error_code ret; 134 krb5_principal tmp_principal; 135 int tmp; 136 time_t tmp_time; 137 krb5_timestamp sec_now; 138 139 ret = principalname2krb5_principal (&tmp_principal, 140 rep->kdc_rep.cname, 141 rep->kdc_rep.crealm); 142 if (ret) 143 goto out; 144 145 /* compare client */ 146 147 if (!ignore_cname) { 148 tmp = krb5_principal_compare (context, tmp_principal, creds->client); 149 if (!tmp) { 150 krb5_free_principal (context, tmp_principal); 151 krb5_clear_error_string (context); 152 ret = KRB5KRB_AP_ERR_MODIFIED; 153 goto out; 154 } 155 } 156 157 krb5_free_principal (context, creds->client); 158 creds->client = tmp_principal; 159 160 /* extract ticket */ 161 { 162 unsigned char *buf; 163 size_t len; 164 len = length_Ticket(&rep->kdc_rep.ticket); 165 buf = malloc(len); 166 if(buf == NULL) { 167 krb5_set_error_string(context, "malloc: out of memory"); 168 ret = ENOMEM; 169 goto out; 170 } 171 encode_Ticket(buf + len - 1, len, &rep->kdc_rep.ticket, &len); 172 creds->ticket.data = buf; 173 creds->ticket.length = len; 174 creds->second_ticket.length = 0; 175 creds->second_ticket.data = NULL; 176 } 177 178 /* compare server */ 179 180 ret = principalname2krb5_principal (&tmp_principal, 181 rep->kdc_rep.ticket.sname, 182 rep->kdc_rep.ticket.realm); 183 if (ret) 184 goto out; 185 if(allow_server_mismatch){ 186 krb5_free_principal(context, creds->server); 187 creds->server = tmp_principal; 188 tmp_principal = NULL; 189 }else{ 190 tmp = krb5_principal_compare (context, tmp_principal, creds->server); 191 krb5_free_principal (context, tmp_principal); 192 if (!tmp) { 193 ret = KRB5KRB_AP_ERR_MODIFIED; 194 krb5_clear_error_string (context); 195 goto out; 196 } 197 } 198 199 /* decrypt */ 200 201 if (decrypt_proc == NULL) 202 decrypt_proc = decrypt_tkt; 203 204 ret = (*decrypt_proc)(context, key, key_usage, decryptarg, rep); 205 if (ret) 206 goto out; 207 208 #if 0 209 /* XXX should this decode be here, or in the decrypt_proc? */ 210 ret = krb5_decode_keyblock(context, &rep->enc_part.key, 1); 211 if(ret) 212 goto out; 213 #endif 214 215 /* compare nonces */ 216 217 if (nonce != rep->enc_part.nonce) { 218 ret = KRB5KRB_AP_ERR_MODIFIED; 219 krb5_set_error_string(context, "malloc: out of memory"); 220 goto out; 221 } 222 223 /* set kdc-offset */ 224 225 krb5_timeofday (context, &sec_now); 226 if (context->kdc_sec_offset == 0 227 && krb5_config_get_bool (context, NULL, 228 "libdefaults", 229 "kdc_timesync", 230 NULL)) { 231 context->kdc_sec_offset = rep->enc_part.authtime - sec_now; 232 krb5_timeofday (context, &sec_now); 233 } 234 235 /* check all times */ 236 237 if (rep->enc_part.starttime) { 238 tmp_time = *rep->enc_part.starttime; 239 } else 240 tmp_time = rep->enc_part.authtime; 241 242 if (creds->times.starttime == 0 243 && abs(tmp_time - sec_now) > context->max_skew) { 244 ret = KRB5KRB_AP_ERR_SKEW; 245 krb5_set_error_string (context, 246 "time skew (%d) larger than max (%d)", 247 abs(tmp_time - sec_now), 248 (int)context->max_skew); 249 goto out; 250 } 251 252 if (creds->times.starttime != 0 253 && tmp_time != creds->times.starttime) { 254 krb5_clear_error_string (context); 255 ret = KRB5KRB_AP_ERR_MODIFIED; 256 goto out; 257 } 258 259 creds->times.starttime = tmp_time; 260 261 if (rep->enc_part.renew_till) { 262 tmp_time = *rep->enc_part.renew_till; 263 } else 264 tmp_time = 0; 265 266 if (creds->times.renew_till != 0 267 && tmp_time > creds->times.renew_till) { 268 krb5_clear_error_string (context); 269 ret = KRB5KRB_AP_ERR_MODIFIED; 270 goto out; 271 } 272 273 creds->times.renew_till = tmp_time; 274 275 creds->times.authtime = rep->enc_part.authtime; 276 277 if (creds->times.endtime != 0 278 && rep->enc_part.endtime > creds->times.endtime) { 279 krb5_clear_error_string (context); 280 ret = KRB5KRB_AP_ERR_MODIFIED; 281 goto out; 282 } 283 284 creds->times.endtime = rep->enc_part.endtime; 285 286 if(rep->enc_part.caddr) 287 krb5_copy_addresses (context, rep->enc_part.caddr, &creds->addresses); 288 else if(addrs) 289 krb5_copy_addresses (context, addrs, &creds->addresses); 290 else { 291 creds->addresses.len = 0; 292 creds->addresses.val = NULL; 293 } 294 creds->flags.b = rep->enc_part.flags; 295 296 creds->authdata.len = 0; 297 creds->authdata.val = NULL; 298 creds->session.keyvalue.length = 0; 299 creds->session.keyvalue.data = NULL; 300 creds->session.keytype = rep->enc_part.key.keytype; 301 ret = krb5_data_copy (&creds->session.keyvalue, 302 rep->enc_part.key.keyvalue.data, 303 rep->enc_part.key.keyvalue.length); 304 305 out: 306 memset (rep->enc_part.key.keyvalue.data, 0, 307 rep->enc_part.key.keyvalue.length); 308 return ret; 309 } 310 311 312 static krb5_error_code 313 make_pa_enc_timestamp(krb5_context context, PA_DATA *pa, 314 krb5_enctype etype, krb5_keyblock *key) 315 { 316 PA_ENC_TS_ENC p; 317 u_char buf[1024]; 318 size_t len; 319 EncryptedData encdata; 320 krb5_error_code ret; 321 int32_t sec, usec; 322 int usec2; 323 krb5_crypto crypto; 324 325 krb5_us_timeofday (context, &sec, &usec); 326 p.patimestamp = sec; 327 usec2 = usec; 328 p.pausec = &usec2; 329 330 ret = encode_PA_ENC_TS_ENC(buf + sizeof(buf) - 1, 331 sizeof(buf), 332 &p, 333 &len); 334 if (ret) 335 return ret; 336 337 ret = krb5_crypto_init(context, key, 0, &crypto); 338 if (ret) 339 return ret; 340 ret = krb5_encrypt_EncryptedData(context, 341 crypto, 342 KRB5_KU_PA_ENC_TIMESTAMP, 343 buf + sizeof(buf) - len, 344 len, 345 0, 346 &encdata); 347 krb5_crypto_destroy(context, crypto); 348 if (ret) 349 return ret; 350 351 ret = encode_EncryptedData(buf + sizeof(buf) - 1, 352 sizeof(buf), 353 &encdata, 354 &len); 355 free_EncryptedData(&encdata); 356 if (ret) 357 return ret; 358 pa->padata_type = KRB5_PADATA_ENC_TIMESTAMP; 359 pa->padata_value.length = 0; 360 krb5_data_copy(&pa->padata_value, 361 buf + sizeof(buf) - len, 362 len); 363 return 0; 364 } 365 366 static krb5_error_code 367 add_padata(krb5_context context, 368 METHOD_DATA *md, 369 krb5_principal client, 370 krb5_key_proc key_proc, 371 krb5_const_pointer keyseed, 372 krb5_enctype *enctypes, 373 unsigned netypes, 374 krb5_salt *salt) 375 { 376 krb5_error_code ret; 377 PA_DATA *pa2; 378 krb5_salt salt2; 379 krb5_enctype *ep; 380 int i; 381 382 if(salt == NULL) { 383 /* default to standard salt */ 384 ret = krb5_get_pw_salt (context, client, &salt2); 385 salt = &salt2; 386 } 387 if (!enctypes) { 388 enctypes = context->etypes; 389 netypes = 0; 390 for (ep = enctypes; *ep != ETYPE_NULL; ep++) 391 netypes++; 392 } 393 pa2 = realloc (md->val, (md->len + netypes) * sizeof(*md->val)); 394 if (pa2 == NULL) { 395 krb5_set_error_string(context, "malloc: out of memory"); 396 return ENOMEM; 397 } 398 md->val = pa2; 399 400 for (i = 0; i < netypes; ++i) { 401 krb5_keyblock *key; 402 403 ret = (*key_proc)(context, enctypes[i], *salt, keyseed, &key); 404 if (ret) 405 continue; 406 ret = make_pa_enc_timestamp (context, &md->val[md->len], 407 enctypes[i], key); 408 krb5_free_keyblock (context, key); 409 if (ret) 410 return ret; 411 ++md->len; 412 } 413 if(salt == &salt2) 414 krb5_free_salt(context, salt2); 415 return 0; 416 } 417 418 static krb5_error_code 419 init_as_req (krb5_context context, 420 krb5_kdc_flags opts, 421 krb5_creds *creds, 422 const krb5_addresses *addrs, 423 const krb5_enctype *etypes, 424 const krb5_preauthtype *ptypes, 425 const krb5_preauthdata *preauth, 426 krb5_key_proc key_proc, 427 krb5_const_pointer keyseed, 428 unsigned nonce, 429 AS_REQ *a) 430 { 431 krb5_error_code ret; 432 krb5_salt salt; 433 434 memset(a, 0, sizeof(*a)); 435 436 a->pvno = 5; 437 a->msg_type = krb_as_req; 438 a->req_body.kdc_options = opts.b; 439 a->req_body.cname = malloc(sizeof(*a->req_body.cname)); 440 if (a->req_body.cname == NULL) { 441 ret = ENOMEM; 442 krb5_set_error_string(context, "malloc: out of memory"); 443 goto fail; 444 } 445 a->req_body.sname = malloc(sizeof(*a->req_body.sname)); 446 if (a->req_body.sname == NULL) { 447 ret = ENOMEM; 448 krb5_set_error_string(context, "malloc: out of memory"); 449 goto fail; 450 } 451 ret = krb5_principal2principalname (a->req_body.cname, creds->client); 452 if (ret) 453 goto fail; 454 ret = krb5_principal2principalname (a->req_body.sname, creds->server); 455 if (ret) 456 goto fail; 457 ret = copy_Realm(&creds->client->realm, &a->req_body.realm); 458 if (ret) 459 goto fail; 460 461 if(creds->times.starttime) { 462 a->req_body.from = malloc(sizeof(*a->req_body.from)); 463 if (a->req_body.from == NULL) { 464 ret = ENOMEM; 465 krb5_set_error_string(context, "malloc: out of memory"); 466 goto fail; 467 } 468 *a->req_body.from = creds->times.starttime; 469 } 470 if(creds->times.endtime){ 471 ALLOC(a->req_body.till, 1); 472 *a->req_body.till = creds->times.endtime; 473 } 474 if(creds->times.renew_till){ 475 a->req_body.rtime = malloc(sizeof(*a->req_body.rtime)); 476 if (a->req_body.rtime == NULL) { 477 ret = ENOMEM; 478 krb5_set_error_string(context, "malloc: out of memory"); 479 goto fail; 480 } 481 *a->req_body.rtime = creds->times.renew_till; 482 } 483 a->req_body.nonce = nonce; 484 ret = krb5_init_etype (context, 485 &a->req_body.etype.len, 486 &a->req_body.etype.val, 487 etypes); 488 if (ret) 489 goto fail; 490 491 /* 492 * This means no addresses 493 */ 494 495 if (addrs && addrs->len == 0) { 496 a->req_body.addresses = NULL; 497 } else { 498 a->req_body.addresses = malloc(sizeof(*a->req_body.addresses)); 499 if (a->req_body.addresses == NULL) { 500 ret = ENOMEM; 501 krb5_set_error_string(context, "malloc: out of memory"); 502 goto fail; 503 } 504 505 if (addrs) 506 ret = krb5_copy_addresses(context, addrs, a->req_body.addresses); 507 else { 508 ret = krb5_get_all_client_addrs (context, a->req_body.addresses); 509 if(ret == 0 && a->req_body.addresses->len == 0) { 510 free(a->req_body.addresses); 511 a->req_body.addresses = NULL; 512 } 513 } 514 if (ret) 515 return ret; 516 } 517 518 a->req_body.enc_authorization_data = NULL; 519 a->req_body.additional_tickets = NULL; 520 521 if(preauth != NULL) { 522 int i; 523 ALLOC(a->padata, 1); 524 if(a->padata == NULL) { 525 ret = ENOMEM; 526 krb5_set_error_string(context, "malloc: out of memory"); 527 goto fail; 528 } 529 for(i = 0; i < preauth->len; i++) { 530 if(preauth->val[i].type == KRB5_PADATA_ENC_TIMESTAMP){ 531 int j; 532 PA_DATA *tmp = realloc(a->padata->val, 533 (a->padata->len + 534 preauth->val[i].info.len) * 535 sizeof(*a->padata->val)); 536 if(tmp == NULL) { 537 ret = ENOMEM; 538 krb5_set_error_string(context, "malloc: out of memory"); 539 goto fail; 540 } 541 a->padata->val = tmp; 542 for(j = 0; j < preauth->val[i].info.len; j++) { 543 krb5_salt *sp = &salt; 544 if(preauth->val[i].info.val[j].salttype) 545 salt.salttype = *preauth->val[i].info.val[j].salttype; 546 else 547 salt.salttype = KRB5_PW_SALT; 548 if(preauth->val[i].info.val[j].salt) 549 salt.saltvalue = *preauth->val[i].info.val[j].salt; 550 else 551 if(salt.salttype == KRB5_PW_SALT) 552 sp = NULL; 553 else 554 krb5_data_zero(&salt.saltvalue); 555 add_padata(context, a->padata, creds->client, 556 key_proc, keyseed, 557 &preauth->val[i].info.val[j].etype, 1, 558 sp); 559 } 560 } 561 } 562 } else 563 /* not sure this is the way to use `ptypes' */ 564 if (ptypes == NULL || *ptypes == KRB5_PADATA_NONE) 565 a->padata = NULL; 566 else if (*ptypes == KRB5_PADATA_ENC_TIMESTAMP) { 567 ALLOC(a->padata, 1); 568 if (a->padata == NULL) { 569 ret = ENOMEM; 570 krb5_set_error_string(context, "malloc: out of memory"); 571 goto fail; 572 } 573 a->padata->len = 0; 574 a->padata->val = NULL; 575 576 /* make a v5 salted pa-data */ 577 add_padata(context, a->padata, creds->client, 578 key_proc, keyseed, a->req_body.etype.val, 579 a->req_body.etype.len, NULL); 580 581 /* make a v4 salted pa-data */ 582 salt.salttype = KRB5_PW_SALT; 583 krb5_data_zero(&salt.saltvalue); 584 add_padata(context, a->padata, creds->client, 585 key_proc, keyseed, a->req_body.etype.val, 586 a->req_body.etype.len, &salt); 587 } else { 588 krb5_set_error_string (context, "pre-auth type %d not supported", 589 *ptypes); 590 ret = KRB5_PREAUTH_BAD_TYPE; 591 goto fail; 592 } 593 return 0; 594 fail: 595 free_AS_REQ(a); 596 return ret; 597 } 598 599 static int 600 set_ptypes(krb5_context context, 601 KRB_ERROR *error, 602 krb5_preauthtype **ptypes, 603 krb5_preauthdata **preauth) 604 { 605 static krb5_preauthdata preauth2; 606 static krb5_preauthtype ptypes2[] = { KRB5_PADATA_ENC_TIMESTAMP, KRB5_PADATA_NONE }; 607 608 if(error->e_data) { 609 METHOD_DATA md; 610 int i; 611 decode_METHOD_DATA(error->e_data->data, 612 error->e_data->length, 613 &md, 614 NULL); 615 for(i = 0; i < md.len; i++){ 616 switch(md.val[i].padata_type){ 617 case KRB5_PADATA_ENC_TIMESTAMP: 618 *ptypes = ptypes2; 619 break; 620 case KRB5_PADATA_ETYPE_INFO: 621 *preauth = &preauth2; 622 ALLOC_SEQ(*preauth, 1); 623 (*preauth)->val[0].type = KRB5_PADATA_ENC_TIMESTAMP; 624 krb5_decode_ETYPE_INFO(context, 625 md.val[i].padata_value.data, 626 md.val[i].padata_value.length, 627 &(*preauth)->val[0].info, 628 NULL); 629 break; 630 default: 631 break; 632 } 633 } 634 free_METHOD_DATA(&md); 635 } else { 636 *ptypes = ptypes2; 637 } 638 return(1); 639 } 640 641 krb5_error_code 642 krb5_get_in_cred(krb5_context context, 643 krb5_flags options, 644 const krb5_addresses *addrs, 645 const krb5_enctype *etypes, 646 const krb5_preauthtype *ptypes, 647 const krb5_preauthdata *preauth, 648 krb5_key_proc key_proc, 649 krb5_const_pointer keyseed, 650 krb5_decrypt_proc decrypt_proc, 651 krb5_const_pointer decryptarg, 652 krb5_creds *creds, 653 krb5_kdc_rep *ret_as_reply) 654 { 655 krb5_error_code ret; 656 AS_REQ a; 657 krb5_kdc_rep rep; 658 krb5_data req, resp; 659 char buf[BUFSIZ]; 660 krb5_salt salt; 661 krb5_keyblock *key; 662 size_t size; 663 krb5_kdc_flags opts; 664 PA_DATA *pa; 665 krb5_enctype etype; 666 krb5_preauthdata *my_preauth = NULL; 667 unsigned nonce; 668 int done; 669 670 opts.i = options; 671 672 krb5_generate_random_block (&nonce, sizeof(nonce)); 673 nonce &= 0xffffffff; 674 675 do { 676 done = 1; 677 ret = init_as_req (context, 678 opts, 679 creds, 680 addrs, 681 etypes, 682 ptypes, 683 preauth, 684 key_proc, 685 keyseed, 686 nonce, 687 &a); 688 if (my_preauth) { 689 free_ETYPE_INFO(&my_preauth->val[0].info); 690 free (my_preauth->val); 691 } 692 if (ret) 693 return ret; 694 695 ret = encode_AS_REQ ((unsigned char*)buf + sizeof(buf) - 1, 696 sizeof(buf), 697 &a, 698 &req.length); 699 free_AS_REQ(&a); 700 if (ret) 701 return ret; 702 703 req.data = buf + sizeof(buf) - req.length; 704 705 ret = krb5_sendto_kdc (context, &req, &creds->client->realm, &resp); 706 if (ret) 707 return ret; 708 709 memset (&rep, 0, sizeof(rep)); 710 ret = decode_AS_REP(resp.data, resp.length, &rep.kdc_rep, &size); 711 if(ret) { 712 /* let's try to parse it as a KRB-ERROR */ 713 KRB_ERROR error; 714 int ret2; 715 716 ret2 = krb5_rd_error(context, &resp, &error); 717 if(ret2 && resp.data && ((char*)resp.data)[0] == 4) 718 ret = KRB5KRB_AP_ERR_V4_REPLY; 719 krb5_data_free(&resp); 720 if (ret2 == 0) { 721 ret = krb5_error_from_rd_error(context, &error, creds); 722 /* if no preauth was set and KDC requires it, give it 723 one more try */ 724 if (!ptypes && !preauth 725 && ret == KRB5KDC_ERR_PREAUTH_REQUIRED 726 #if 0 727 || ret == KRB5KDC_ERR_BADOPTION 728 #endif 729 && set_ptypes(context, &error, &ptypes, &my_preauth)) { 730 done = 0; 731 preauth = my_preauth; 732 krb5_free_error_contents(context, &error); 733 krb5_clear_error_string(context); 734 continue; 735 } 736 if(ret_as_reply) 737 ret_as_reply->error = error; 738 else 739 free_KRB_ERROR (&error); 740 return ret; 741 } 742 return ret; 743 } 744 krb5_data_free(&resp); 745 } while(!done); 746 747 pa = NULL; 748 etype = rep.kdc_rep.enc_part.etype; 749 if(rep.kdc_rep.padata){ 750 int index = 0; 751 pa = krb5_find_padata(rep.kdc_rep.padata->val, rep.kdc_rep.padata->len, 752 KRB5_PADATA_PW_SALT, &index); 753 if(pa == NULL) { 754 index = 0; 755 pa = krb5_find_padata(rep.kdc_rep.padata->val, 756 rep.kdc_rep.padata->len, 757 KRB5_PADATA_AFS3_SALT, &index); 758 } 759 } 760 if(pa) { 761 salt.salttype = pa->padata_type; 762 salt.saltvalue = pa->padata_value; 763 764 ret = (*key_proc)(context, etype, salt, keyseed, &key); 765 } else { 766 /* make a v5 salted pa-data */ 767 ret = krb5_get_pw_salt (context, creds->client, &salt); 768 769 if (ret) 770 goto out; 771 ret = (*key_proc)(context, etype, salt, keyseed, &key); 772 krb5_free_salt(context, salt); 773 } 774 if (ret) 775 goto out; 776 777 ret = _krb5_extract_ticket(context, 778 &rep, 779 creds, 780 key, 781 keyseed, 782 KRB5_KU_AS_REP_ENC_PART, 783 NULL, 784 nonce, 785 FALSE, 786 opts.b.request_anonymous, 787 decrypt_proc, 788 decryptarg); 789 memset (key->keyvalue.data, 0, key->keyvalue.length); 790 krb5_free_keyblock_contents (context, key); 791 free (key); 792 793 out: 794 if (ret == 0 && ret_as_reply) 795 *ret_as_reply = rep; 796 else 797 krb5_free_kdc_rep (context, &rep); 798 return ret; 799 } 800 801 krb5_error_code 802 krb5_get_in_tkt(krb5_context context, 803 krb5_flags options, 804 const krb5_addresses *addrs, 805 const krb5_enctype *etypes, 806 const krb5_preauthtype *ptypes, 807 krb5_key_proc key_proc, 808 krb5_const_pointer keyseed, 809 krb5_decrypt_proc decrypt_proc, 810 krb5_const_pointer decryptarg, 811 krb5_creds *creds, 812 krb5_ccache ccache, 813 krb5_kdc_rep *ret_as_reply) 814 { 815 krb5_error_code ret; 816 krb5_kdc_flags opts; 817 opts.i = 0; 818 opts.b = int2KDCOptions(options); 819 820 ret = krb5_get_in_cred (context, 821 opts.i, 822 addrs, 823 etypes, 824 ptypes, 825 NULL, 826 key_proc, 827 keyseed, 828 decrypt_proc, 829 decryptarg, 830 creds, 831 ret_as_reply); 832 if(ret) 833 return ret; 834 ret = krb5_cc_store_cred (context, ccache, creds); 835 krb5_free_creds_contents (context, creds); 836 return ret; 837 } 838