1 /* crypto/x509/x509_lu.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include "cryptlib.h" 61 #include <openssl/lhash.h> 62 #include <openssl/x509.h> 63 #include <openssl/x509v3.h> 64 65 X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method) 66 { 67 X509_LOOKUP *ret; 68 69 ret=(X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP)); 70 if (ret == NULL) return NULL; 71 72 ret->init=0; 73 ret->skip=0; 74 ret->method=method; 75 ret->method_data=NULL; 76 ret->store_ctx=NULL; 77 if ((method->new_item != NULL) && !method->new_item(ret)) 78 { 79 OPENSSL_free(ret); 80 return NULL; 81 } 82 return ret; 83 } 84 85 void X509_LOOKUP_free(X509_LOOKUP *ctx) 86 { 87 if (ctx == NULL) return; 88 if ( (ctx->method != NULL) && 89 (ctx->method->free != NULL)) 90 ctx->method->free(ctx); 91 OPENSSL_free(ctx); 92 } 93 94 int X509_LOOKUP_init(X509_LOOKUP *ctx) 95 { 96 if (ctx->method == NULL) return 0; 97 if (ctx->method->init != NULL) 98 return ctx->method->init(ctx); 99 else 100 return 1; 101 } 102 103 int X509_LOOKUP_shutdown(X509_LOOKUP *ctx) 104 { 105 if (ctx->method == NULL) return 0; 106 if (ctx->method->shutdown != NULL) 107 return ctx->method->shutdown(ctx); 108 else 109 return 1; 110 } 111 112 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl, 113 char **ret) 114 { 115 if (ctx->method == NULL) return -1; 116 if (ctx->method->ctrl != NULL) 117 return ctx->method->ctrl(ctx,cmd,argc,argl,ret); 118 else 119 return 1; 120 } 121 122 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name, 123 X509_OBJECT *ret) 124 { 125 if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL)) 126 return X509_LU_FAIL; 127 if (ctx->skip) return 0; 128 return ctx->method->get_by_subject(ctx,type,name,ret); 129 } 130 131 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name, 132 ASN1_INTEGER *serial, X509_OBJECT *ret) 133 { 134 if ((ctx->method == NULL) || 135 (ctx->method->get_by_issuer_serial == NULL)) 136 return X509_LU_FAIL; 137 return ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret); 138 } 139 140 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type, 141 unsigned char *bytes, int len, X509_OBJECT *ret) 142 { 143 if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL)) 144 return X509_LU_FAIL; 145 return ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret); 146 } 147 148 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len, 149 X509_OBJECT *ret) 150 { 151 if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL)) 152 return X509_LU_FAIL; 153 return ctx->method->get_by_alias(ctx,type,str,len,ret); 154 } 155 156 157 static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b) 158 { 159 int ret; 160 161 ret=((*a)->type - (*b)->type); 162 if (ret) return ret; 163 switch ((*a)->type) 164 { 165 case X509_LU_X509: 166 ret=X509_subject_name_cmp((*a)->data.x509,(*b)->data.x509); 167 break; 168 case X509_LU_CRL: 169 ret=X509_CRL_cmp((*a)->data.crl,(*b)->data.crl); 170 break; 171 default: 172 /* abort(); */ 173 return 0; 174 } 175 return ret; 176 } 177 178 X509_STORE *X509_STORE_new(void) 179 { 180 X509_STORE *ret; 181 182 if ((ret=(X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL) 183 return NULL; 184 ret->objs = sk_X509_OBJECT_new(x509_object_cmp); 185 ret->cache=1; 186 ret->get_cert_methods=sk_X509_LOOKUP_new_null(); 187 ret->verify=0; 188 ret->verify_cb=0; 189 190 ret->purpose = 0; 191 ret->trust = 0; 192 193 ret->flags = 0; 194 195 ret->get_issuer = 0; 196 ret->check_issued = 0; 197 ret->check_revocation = 0; 198 ret->get_crl = 0; 199 ret->check_crl = 0; 200 ret->cert_crl = 0; 201 ret->cleanup = 0; 202 203 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data); 204 ret->references=1; 205 ret->depth=0; 206 return ret; 207 } 208 209 static void cleanup(X509_OBJECT *a) 210 { 211 if (a->type == X509_LU_X509) 212 { 213 X509_free(a->data.x509); 214 } 215 else if (a->type == X509_LU_CRL) 216 { 217 X509_CRL_free(a->data.crl); 218 } 219 else 220 { 221 /* abort(); */ 222 } 223 224 OPENSSL_free(a); 225 } 226 227 void X509_STORE_free(X509_STORE *vfy) 228 { 229 int i; 230 STACK_OF(X509_LOOKUP) *sk; 231 X509_LOOKUP *lu; 232 233 if (vfy == NULL) 234 return; 235 236 sk=vfy->get_cert_methods; 237 for (i=0; i<sk_X509_LOOKUP_num(sk); i++) 238 { 239 lu=sk_X509_LOOKUP_value(sk,i); 240 X509_LOOKUP_shutdown(lu); 241 X509_LOOKUP_free(lu); 242 } 243 sk_X509_LOOKUP_free(sk); 244 sk_X509_OBJECT_pop_free(vfy->objs, cleanup); 245 246 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data); 247 OPENSSL_free(vfy); 248 } 249 250 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m) 251 { 252 int i; 253 STACK_OF(X509_LOOKUP) *sk; 254 X509_LOOKUP *lu; 255 256 sk=v->get_cert_methods; 257 for (i=0; i<sk_X509_LOOKUP_num(sk); i++) 258 { 259 lu=sk_X509_LOOKUP_value(sk,i); 260 if (m == lu->method) 261 { 262 return lu; 263 } 264 } 265 /* a new one */ 266 lu=X509_LOOKUP_new(m); 267 if (lu == NULL) 268 return NULL; 269 else 270 { 271 lu->store_ctx=v; 272 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu)) 273 return lu; 274 else 275 { 276 X509_LOOKUP_free(lu); 277 return NULL; 278 } 279 } 280 } 281 282 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name, 283 X509_OBJECT *ret) 284 { 285 X509_STORE *ctx=vs->ctx; 286 X509_LOOKUP *lu; 287 X509_OBJECT stmp,*tmp; 288 int i,j; 289 290 tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name); 291 292 if (tmp == NULL) 293 { 294 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++) 295 { 296 lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i); 297 j=X509_LOOKUP_by_subject(lu,type,name,&stmp); 298 if (j < 0) 299 { 300 vs->current_method=j; 301 return j; 302 } 303 else if (j) 304 { 305 tmp= &stmp; 306 break; 307 } 308 } 309 vs->current_method=0; 310 if (tmp == NULL) 311 return 0; 312 } 313 314 /* if (ret->data.ptr != NULL) 315 X509_OBJECT_free_contents(ret); */ 316 317 ret->type=tmp->type; 318 ret->data.ptr=tmp->data.ptr; 319 320 X509_OBJECT_up_ref_count(ret); 321 322 return 1; 323 } 324 325 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x) 326 { 327 X509_OBJECT *obj; 328 int ret=1; 329 330 if (x == NULL) return 0; 331 obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT)); 332 if (obj == NULL) 333 { 334 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE); 335 return 0; 336 } 337 obj->type=X509_LU_X509; 338 obj->data.x509=x; 339 340 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); 341 342 X509_OBJECT_up_ref_count(obj); 343 344 345 if (X509_OBJECT_retrieve_match(ctx->objs, obj)) 346 { 347 X509_OBJECT_free_contents(obj); 348 OPENSSL_free(obj); 349 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE); 350 ret=0; 351 } 352 else sk_X509_OBJECT_push(ctx->objs, obj); 353 354 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); 355 356 return ret; 357 } 358 359 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x) 360 { 361 X509_OBJECT *obj; 362 int ret=1; 363 364 if (x == NULL) return 0; 365 obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT)); 366 if (obj == NULL) 367 { 368 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE); 369 return 0; 370 } 371 obj->type=X509_LU_CRL; 372 obj->data.crl=x; 373 374 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); 375 376 X509_OBJECT_up_ref_count(obj); 377 378 if (X509_OBJECT_retrieve_match(ctx->objs, obj)) 379 { 380 X509_OBJECT_free_contents(obj); 381 OPENSSL_free(obj); 382 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE); 383 ret=0; 384 } 385 else sk_X509_OBJECT_push(ctx->objs, obj); 386 387 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); 388 389 return ret; 390 } 391 392 void X509_OBJECT_up_ref_count(X509_OBJECT *a) 393 { 394 switch (a->type) 395 { 396 case X509_LU_X509: 397 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509); 398 break; 399 case X509_LU_CRL: 400 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL); 401 break; 402 } 403 } 404 405 void X509_OBJECT_free_contents(X509_OBJECT *a) 406 { 407 switch (a->type) 408 { 409 case X509_LU_X509: 410 X509_free(a->data.x509); 411 break; 412 case X509_LU_CRL: 413 X509_CRL_free(a->data.crl); 414 break; 415 } 416 } 417 418 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type, 419 X509_NAME *name) 420 { 421 X509_OBJECT stmp; 422 X509 x509_s; 423 X509_CINF cinf_s; 424 X509_CRL crl_s; 425 X509_CRL_INFO crl_info_s; 426 427 stmp.type=type; 428 switch (type) 429 { 430 case X509_LU_X509: 431 stmp.data.x509= &x509_s; 432 x509_s.cert_info= &cinf_s; 433 cinf_s.subject=name; 434 break; 435 case X509_LU_CRL: 436 stmp.data.crl= &crl_s; 437 crl_s.crl= &crl_info_s; 438 crl_info_s.issuer=name; 439 break; 440 default: 441 /* abort(); */ 442 return -1; 443 } 444 445 return sk_X509_OBJECT_find(h,&stmp); 446 } 447 448 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type, 449 X509_NAME *name) 450 { 451 int idx; 452 idx = X509_OBJECT_idx_by_subject(h, type, name); 453 if (idx==-1) return NULL; 454 return sk_X509_OBJECT_value(h, idx); 455 } 456 457 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x) 458 { 459 int idx, i; 460 X509_OBJECT *obj; 461 idx = sk_X509_OBJECT_find(h, x); 462 if (idx == -1) return NULL; 463 if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx); 464 for (i = idx; i < sk_X509_OBJECT_num(h); i++) 465 { 466 obj = sk_X509_OBJECT_value(h, i); 467 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x)) 468 return NULL; 469 if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509)) 470 return obj; 471 } 472 return NULL; 473 } 474 475 476 /* Try to get issuer certificate from store. Due to limitations 477 * of the API this can only retrieve a single certificate matching 478 * a given subject name. However it will fill the cache with all 479 * matching certificates, so we can examine the cache for all 480 * matches. 481 * 482 * Return values are: 483 * 1 lookup successful. 484 * 0 certificate not found. 485 * -1 some other error. 486 */ 487 488 489 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x) 490 { 491 X509_NAME *xn; 492 X509_OBJECT obj, *pobj; 493 int i, ok, idx; 494 xn=X509_get_issuer_name(x); 495 ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj); 496 if (ok != X509_LU_X509) 497 { 498 if (ok == X509_LU_RETRY) 499 { 500 X509_OBJECT_free_contents(&obj); 501 X509err(X509_F_X509_VERIFY_CERT,X509_R_SHOULD_RETRY); 502 return -1; 503 } 504 else if (ok != X509_LU_FAIL) 505 { 506 X509_OBJECT_free_contents(&obj); 507 /* not good :-(, break anyway */ 508 return -1; 509 } 510 return 0; 511 } 512 /* If certificate matches all OK */ 513 if (ctx->check_issued(ctx, x, obj.data.x509)) 514 { 515 *issuer = obj.data.x509; 516 return 1; 517 } 518 X509_OBJECT_free_contents(&obj); 519 /* Else find index of first matching cert */ 520 idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn); 521 /* This shouldn't normally happen since we already have one match */ 522 if (idx == -1) return 0; 523 524 /* Look through all matching certificates for a suitable issuer */ 525 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++) 526 { 527 pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i); 528 /* See if we've ran out of matches */ 529 if (pobj->type != X509_LU_X509) return 0; 530 if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0; 531 if (ctx->check_issued(ctx, x, pobj->data.x509)) 532 { 533 *issuer = pobj->data.x509; 534 X509_OBJECT_up_ref_count(pobj); 535 return 1; 536 } 537 } 538 return 0; 539 } 540 541 void X509_STORE_set_flags(X509_STORE *ctx, long flags) 542 { 543 ctx->flags |= flags; 544 } 545 546 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose) 547 { 548 return X509_PURPOSE_set(&ctx->purpose, purpose); 549 } 550 551 int X509_STORE_set_trust(X509_STORE *ctx, int trust) 552 { 553 return X509_TRUST_set(&ctx->trust, trust); 554 } 555 556 IMPLEMENT_STACK_OF(X509_LOOKUP) 557 IMPLEMENT_STACK_OF(X509_OBJECT) 558