crypto/x509/x509_lu.c

   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)