1 /* $NetBSD: get_in_tkt.c,v 1.3 2019/12/15 22:50:50 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997 - 2008 Kungliga Tekniska Hgskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #define KRB5_DEPRECATED_FUNCTION(x) 37 38 #include "krb5_locl.h" 39 40 #ifndef HEIMDAL_SMALLER 41 42 static krb5_error_code 43 make_pa_enc_timestamp(krb5_context context, PA_DATA *pa, 44 krb5_enctype etype, krb5_keyblock *key) 45 { 46 PA_ENC_TS_ENC p; 47 unsigned char *buf; 48 size_t buf_size; 49 size_t len = 0; 50 EncryptedData encdata; 51 krb5_error_code ret; 52 int32_t usec; 53 int usec2; 54 krb5_crypto crypto; 55 56 krb5_us_timeofday (context, &p.patimestamp, &usec); 57 usec2 = usec; 58 p.pausec = &usec2; 59 60 ASN1_MALLOC_ENCODE(PA_ENC_TS_ENC, buf, buf_size, &p, &len, ret); 61 if (ret) 62 return ret; 63 if(buf_size != len) 64 krb5_abortx(context, "internal error in ASN.1 encoder"); 65 ret = krb5_crypto_init(context, key, 0, &crypto); 66 if (ret) { 67 free(buf); 68 return ret; 69 } 70 ret = krb5_encrypt_EncryptedData(context, 71 crypto, 72 KRB5_KU_PA_ENC_TIMESTAMP, 73 buf, 74 len, 75 0, 76 &encdata); 77 free(buf); 78 krb5_crypto_destroy(context, crypto); 79 if (ret) 80 return ret; 81 82 ASN1_MALLOC_ENCODE(EncryptedData, buf, buf_size, &encdata, &len, ret); 83 free_EncryptedData(&encdata); 84 if (ret) 85 return ret; 86 if(buf_size != len) 87 krb5_abortx(context, "internal error in ASN.1 encoder"); 88 pa->padata_type = KRB5_PADATA_ENC_TIMESTAMP; 89 pa->padata_value.length = len; 90 pa->padata_value.data = buf; 91 return 0; 92 } 93 94 static krb5_error_code 95 add_padata(krb5_context context, 96 METHOD_DATA *md, 97 krb5_principal client, 98 krb5_key_proc key_proc, 99 krb5_const_pointer keyseed, 100 krb5_enctype *enctypes, 101 unsigned netypes, 102 krb5_salt *salt) 103 { 104 krb5_error_code ret; 105 PA_DATA *pa2; 106 krb5_salt salt2; 107 krb5_enctype *ep; 108 size_t i; 109 110 if(salt == NULL) { 111 /* default to standard salt */ 112 ret = krb5_get_pw_salt (context, client, &salt2); 113 if (ret) 114 return ret; 115 salt = &salt2; 116 } 117 if (!enctypes) { 118 enctypes = context->etypes; 119 netypes = 0; 120 for (ep = enctypes; *ep != (krb5_enctype)ETYPE_NULL; ep++) 121 netypes++; 122 } 123 pa2 = realloc (md->val, (md->len + netypes) * sizeof(*md->val)); 124 if (pa2 == NULL) 125 return krb5_enomem(context); 126 md->val = pa2; 127 128 for (i = 0; i < netypes; ++i) { 129 krb5_keyblock *key; 130 131 ret = (*key_proc)(context, enctypes[i], *salt, keyseed, &key); 132 if (ret) 133 continue; 134 ret = make_pa_enc_timestamp (context, &md->val[md->len], 135 enctypes[i], key); 136 krb5_free_keyblock (context, key); 137 if (ret) 138 return ret; 139 ++md->len; 140 } 141 if(salt == &salt2) 142 krb5_free_salt(context, salt2); 143 return 0; 144 } 145 146 static krb5_error_code 147 init_as_req (krb5_context context, 148 KDCOptions opts, 149 krb5_creds *creds, 150 const krb5_addresses *addrs, 151 const krb5_enctype *etypes, 152 const krb5_preauthtype *ptypes, 153 const krb5_preauthdata *preauth, 154 krb5_key_proc key_proc, 155 krb5_const_pointer keyseed, 156 unsigned nonce, 157 AS_REQ *a) 158 { 159 krb5_error_code ret; 160 krb5_salt salt; 161 162 memset(a, 0, sizeof(*a)); 163 164 a->pvno = 5; 165 a->msg_type = krb_as_req; 166 a->req_body.kdc_options = opts; 167 a->req_body.cname = malloc(sizeof(*a->req_body.cname)); 168 if (a->req_body.cname == NULL) { 169 ret = krb5_enomem(context); 170 goto fail; 171 } 172 a->req_body.sname = malloc(sizeof(*a->req_body.sname)); 173 if (a->req_body.sname == NULL) { 174 ret = krb5_enomem(context); 175 goto fail; 176 } 177 ret = _krb5_principal2principalname (a->req_body.cname, creds->client); 178 if (ret) 179 goto fail; 180 ret = _krb5_principal2principalname (a->req_body.sname, creds->server); 181 if (ret) 182 goto fail; 183 ret = copy_Realm(&creds->client->realm, &a->req_body.realm); 184 if (ret) 185 goto fail; 186 187 if(creds->times.starttime) { 188 a->req_body.from = malloc(sizeof(*a->req_body.from)); 189 if (a->req_body.from == NULL) { 190 ret = krb5_enomem(context); 191 goto fail; 192 } 193 *a->req_body.from = creds->times.starttime; 194 } 195 if(creds->times.endtime){ 196 ALLOC(a->req_body.till, 1); 197 *a->req_body.till = creds->times.endtime; 198 } 199 if(creds->times.renew_till){ 200 a->req_body.rtime = malloc(sizeof(*a->req_body.rtime)); 201 if (a->req_body.rtime == NULL) { 202 ret = krb5_enomem(context); 203 goto fail; 204 } 205 *a->req_body.rtime = creds->times.renew_till; 206 } 207 a->req_body.nonce = nonce; 208 ret = _krb5_init_etype(context, 209 KRB5_PDU_AS_REQUEST, 210 &a->req_body.etype.len, 211 &a->req_body.etype.val, 212 etypes); 213 if (ret) 214 goto fail; 215 216 /* 217 * This means no addresses 218 */ 219 220 if (addrs && addrs->len == 0) { 221 a->req_body.addresses = NULL; 222 } else { 223 a->req_body.addresses = malloc(sizeof(*a->req_body.addresses)); 224 if (a->req_body.addresses == NULL) { 225 ret = krb5_enomem(context); 226 goto fail; 227 } 228 229 if (addrs) 230 ret = krb5_copy_addresses(context, addrs, a->req_body.addresses); 231 else { 232 ret = krb5_get_all_client_addrs (context, a->req_body.addresses); 233 if(ret == 0 && a->req_body.addresses->len == 0) { 234 free(a->req_body.addresses); 235 a->req_body.addresses = NULL; 236 } 237 } 238 if (ret) 239 return ret; 240 } 241 242 a->req_body.enc_authorization_data = NULL; 243 a->req_body.additional_tickets = NULL; 244 245 if(preauth != NULL) { 246 size_t i; 247 ALLOC(a->padata, 1); 248 if(a->padata == NULL) { 249 ret = krb5_enomem(context); 250 goto fail; 251 } 252 a->padata->val = NULL; 253 a->padata->len = 0; 254 for(i = 0; i < preauth->len; i++) { 255 if(preauth->val[i].type == KRB5_PADATA_ENC_TIMESTAMP){ 256 size_t j; 257 258 for(j = 0; j < preauth->val[i].info.len; j++) { 259 krb5_salt *sp = &salt; 260 if(preauth->val[i].info.val[j].salttype) 261 salt.salttype = *preauth->val[i].info.val[j].salttype; 262 else 263 salt.salttype = KRB5_PW_SALT; 264 if(preauth->val[i].info.val[j].salt) 265 salt.saltvalue = *preauth->val[i].info.val[j].salt; 266 else 267 if(salt.salttype == KRB5_PW_SALT) 268 sp = NULL; 269 else 270 krb5_data_zero(&salt.saltvalue); 271 ret = add_padata(context, a->padata, creds->client, 272 key_proc, keyseed, 273 &preauth->val[i].info.val[j].etype, 1, 274 sp); 275 if (ret == 0) 276 break; 277 } 278 } 279 } 280 } else 281 /* not sure this is the way to use `ptypes' */ 282 if (ptypes == NULL || *ptypes == KRB5_PADATA_NONE) 283 a->padata = NULL; 284 else if (*ptypes == KRB5_PADATA_ENC_TIMESTAMP) { 285 ALLOC(a->padata, 1); 286 if (a->padata == NULL) { 287 ret = krb5_enomem(context); 288 goto fail; 289 } 290 a->padata->len = 0; 291 a->padata->val = NULL; 292 293 /* make a v5 salted pa-data */ 294 add_padata(context, a->padata, creds->client, 295 key_proc, keyseed, a->req_body.etype.val, 296 a->req_body.etype.len, NULL); 297 298 /* make a v4 salted pa-data */ 299 salt.salttype = KRB5_PW_SALT; 300 krb5_data_zero(&salt.saltvalue); 301 add_padata(context, a->padata, creds->client, 302 key_proc, keyseed, a->req_body.etype.val, 303 a->req_body.etype.len, &salt); 304 } else { 305 ret = KRB5_PREAUTH_BAD_TYPE; 306 krb5_set_error_message (context, ret, 307 N_("pre-auth type %d not supported", ""), 308 *ptypes); 309 goto fail; 310 } 311 return 0; 312 fail: 313 free_AS_REQ(a); 314 return ret; 315 } 316 317 static int 318 set_ptypes(krb5_context context, 319 KRB_ERROR *error, 320 const krb5_preauthtype **ptypes, 321 krb5_preauthdata **preauth) 322 { 323 static krb5_preauthdata preauth2; 324 static krb5_preauthtype ptypes2[] = { KRB5_PADATA_ENC_TIMESTAMP, KRB5_PADATA_NONE }; 325 326 if(error->e_data) { 327 METHOD_DATA md; 328 size_t i; 329 decode_METHOD_DATA(error->e_data->data, 330 error->e_data->length, 331 &md, 332 NULL); 333 for(i = 0; i < md.len; i++){ 334 switch(md.val[i].padata_type){ 335 case KRB5_PADATA_ENC_TIMESTAMP: 336 *ptypes = ptypes2; 337 break; 338 case KRB5_PADATA_ETYPE_INFO: 339 *preauth = &preauth2; 340 ALLOC_SEQ(*preauth, 1); 341 (*preauth)->val[0].type = KRB5_PADATA_ENC_TIMESTAMP; 342 decode_ETYPE_INFO(md.val[i].padata_value.data, 343 md.val[i].padata_value.length, 344 &(*preauth)->val[0].info, 345 NULL); 346 break; 347 default: 348 break; 349 } 350 } 351 free_METHOD_DATA(&md); 352 } else { 353 *ptypes = ptypes2; 354 } 355 return(1); 356 } 357 358 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 359 krb5_get_in_cred(krb5_context context, 360 krb5_flags options, 361 const krb5_addresses *addrs, 362 const krb5_enctype *etypes, 363 const krb5_preauthtype *ptypes, 364 const krb5_preauthdata *preauth, 365 krb5_key_proc key_proc, 366 krb5_const_pointer keyseed, 367 krb5_decrypt_proc decrypt_proc, 368 krb5_const_pointer decryptarg, 369 krb5_creds *creds, 370 krb5_kdc_rep *ret_as_reply) 371 KRB5_DEPRECATED_FUNCTION("Use X instead") 372 { 373 krb5_error_code ret; 374 AS_REQ a; 375 krb5_kdc_rep rep; 376 krb5_data req, resp; 377 size_t len = 0; 378 krb5_salt salt; 379 krb5_keyblock *key; 380 size_t size; 381 KDCOptions opts; 382 PA_DATA *pa; 383 krb5_enctype etype; 384 krb5_preauthdata *my_preauth = NULL; 385 unsigned nonce; 386 int done; 387 388 opts = int2KDCOptions(options); 389 390 krb5_generate_random_block (&nonce, sizeof(nonce)); 391 nonce &= 0xffffffff; 392 393 do { 394 done = 1; 395 ret = init_as_req (context, 396 opts, 397 creds, 398 addrs, 399 etypes, 400 ptypes, 401 preauth, 402 key_proc, 403 keyseed, 404 nonce, 405 &a); 406 if (my_preauth) { 407 free_ETYPE_INFO(&my_preauth->val[0].info); 408 free (my_preauth->val); 409 my_preauth = NULL; 410 } 411 if (ret) 412 return ret; 413 414 ASN1_MALLOC_ENCODE(AS_REQ, req.data, req.length, &a, &len, ret); 415 free_AS_REQ(&a); 416 if (ret) 417 return ret; 418 if(len != req.length) 419 krb5_abortx(context, "internal error in ASN.1 encoder"); 420 421 ret = krb5_sendto_kdc (context, &req, &creds->client->realm, &resp); 422 krb5_data_free(&req); 423 if (ret) 424 return ret; 425 426 memset (&rep, 0, sizeof(rep)); 427 ret = decode_AS_REP(resp.data, resp.length, &rep.kdc_rep, &size); 428 if(ret) { 429 /* let's try to parse it as a KRB-ERROR */ 430 KRB_ERROR error; 431 int ret2; 432 433 ret2 = krb5_rd_error(context, &resp, &error); 434 if(ret2 && resp.data && ((char*)resp.data)[0] == 4) 435 ret = KRB5KRB_AP_ERR_V4_REPLY; 436 krb5_data_free(&resp); 437 if (ret2 == 0) { 438 ret = krb5_error_from_rd_error(context, &error, creds); 439 /* if no preauth was set and KDC requires it, give it 440 one more try */ 441 if (!ptypes && !preauth 442 && ret == KRB5KDC_ERR_PREAUTH_REQUIRED 443 #if 0 444 || ret == KRB5KDC_ERR_BADOPTION 445 #endif 446 && set_ptypes(context, &error, &ptypes, &my_preauth)) { 447 done = 0; 448 preauth = my_preauth; 449 krb5_free_error_contents(context, &error); 450 krb5_clear_error_message(context); 451 continue; 452 } 453 if(ret_as_reply) 454 ret_as_reply->error = error; 455 else 456 free_KRB_ERROR (&error); 457 return ret; 458 } 459 return ret; 460 } 461 krb5_data_free(&resp); 462 } while(!done); 463 464 pa = NULL; 465 etype = rep.kdc_rep.enc_part.etype; 466 if(rep.kdc_rep.padata){ 467 int i = 0; 468 pa = krb5_find_padata(rep.kdc_rep.padata->val, rep.kdc_rep.padata->len, 469 KRB5_PADATA_PW_SALT, &i); 470 if(pa == NULL) { 471 i = 0; 472 pa = krb5_find_padata(rep.kdc_rep.padata->val, 473 rep.kdc_rep.padata->len, 474 KRB5_PADATA_AFS3_SALT, &i); 475 } 476 } 477 if(pa) { 478 salt.salttype = (krb5_salttype)pa->padata_type; 479 salt.saltvalue = pa->padata_value; 480 481 ret = (*key_proc)(context, etype, salt, keyseed, &key); 482 } else { 483 /* make a v5 salted pa-data */ 484 ret = krb5_get_pw_salt (context, creds->client, &salt); 485 486 if (ret) 487 goto out; 488 ret = (*key_proc)(context, etype, salt, keyseed, &key); 489 krb5_free_salt(context, salt); 490 } 491 if (ret) 492 goto out; 493 494 { 495 unsigned flags = EXTRACT_TICKET_TIMESYNC; 496 if (opts.request_anonymous) 497 flags |= EXTRACT_TICKET_ALLOW_SERVER_MISMATCH | EXTRACT_TICKET_MATCH_ANON; 498 499 ret = _krb5_extract_ticket(context, 500 &rep, 501 creds, 502 key, 503 keyseed, 504 KRB5_KU_AS_REP_ENC_PART, 505 NULL, 506 nonce, 507 flags, 508 NULL, 509 decrypt_proc, 510 decryptarg); 511 } 512 memset (key->keyvalue.data, 0, key->keyvalue.length); 513 krb5_free_keyblock_contents (context, key); 514 free (key); 515 516 out: 517 if (ret == 0 && ret_as_reply) 518 *ret_as_reply = rep; 519 else 520 krb5_free_kdc_rep (context, &rep); 521 return ret; 522 } 523 524 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 525 krb5_get_in_tkt(krb5_context context, 526 krb5_flags options, 527 const krb5_addresses *addrs, 528 const krb5_enctype *etypes, 529 const krb5_preauthtype *ptypes, 530 krb5_key_proc key_proc, 531 krb5_const_pointer keyseed, 532 krb5_decrypt_proc decrypt_proc, 533 krb5_const_pointer decryptarg, 534 krb5_creds *creds, 535 krb5_ccache ccache, 536 krb5_kdc_rep *ret_as_reply) 537 KRB5_DEPRECATED_FUNCTION("Use X instead") 538 { 539 krb5_error_code ret; 540 541 ret = krb5_get_in_cred (context, 542 options, 543 addrs, 544 etypes, 545 ptypes, 546 NULL, 547 key_proc, 548 keyseed, 549 decrypt_proc, 550 decryptarg, 551 creds, 552 ret_as_reply); 553 if(ret) 554 return ret; 555 if (ccache) 556 ret = krb5_cc_store_cred (context, ccache, creds); 557 return ret; 558 } 559 560 #endif /* HEIMDAL_SMALLER */ 561
Indexes created Sat Feb 28 05:31:39 UTC 2026