crypto/openssl/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         if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)
 191                 return NULL;
 192
 193         ret->get_issuer = 0;
 194         ret->check_issued = 0;
 195         ret->check_revocation = 0;
 196         ret->get_crl = 0;
 197         ret->check_crl = 0;
 198         ret->cert_crl = 0;
 199         ret->cleanup = 0;
 200
 201         if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data))
 202                 {
 203                 sk_X509_OBJECT_free(ret->objs);
 204                 OPENSSL_free(ret);
 205                 return NULL;
 206                 }
 207
 208         ret->references=1;
 209         return ret;
 210         }
 211
 212 static void cleanup(X509_OBJECT *a)
 213         {
 214         if (a->type == X509_LU_X509)
 215                 {
 216                 X509_free(a->data.x509);
 217                 }
 218         else if (a->type == X509_LU_CRL)
 219                 {
 220                 X509_CRL_free(a->data.crl);
 221                 }
 222         else
 223                 {
 224                 /* abort(); */
 225                 }
 226
 227         OPENSSL_free(a);
 228         }
 229
 230 void X509_STORE_free(X509_STORE *vfy)
 231         {
 232         int i;
 233         STACK_OF(X509_LOOKUP) *sk;
 234         X509_LOOKUP *lu;
 235
 236         if (vfy == NULL)
 237             return;
 238
 239         sk=vfy->get_cert_methods;
 240         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 241                 {
 242                 lu=sk_X509_LOOKUP_value(sk,i);
 243                 X509_LOOKUP_shutdown(lu);
 244                 X509_LOOKUP_free(lu);
 245                 }
 246         sk_X509_LOOKUP_free(sk);
 247         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
 248
 249         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
 250         if (vfy->param)
 251                 X509_VERIFY_PARAM_free(vfy->param);
 252         OPENSSL_free(vfy);
 253         }
 254
 255 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 256         {
 257         int i;
 258         STACK_OF(X509_LOOKUP) *sk;
 259         X509_LOOKUP *lu;
 260
 261         sk=v->get_cert_methods;
 262         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 263                 {
 264                 lu=sk_X509_LOOKUP_value(sk,i);
 265                 if (m == lu->method)
 266                         {
 267                         return lu;
 268                         }
 269                 }
 270         /* a new one */
 271         lu=X509_LOOKUP_new(m);
 272         if (lu == NULL)
 273                 return NULL;
 274         else
 275                 {
 276                 lu->store_ctx=v;
 277                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
 278                         return lu;
 279                 else
 280                         {
 281                         X509_LOOKUP_free(lu);
 282                         return NULL;
 283                         }
 284                 }
 285         }
 286
 287 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
 288              X509_OBJECT *ret)
 289         {
 290         X509_STORE *ctx=vs->ctx;
 291         X509_LOOKUP *lu;
 292         X509_OBJECT stmp,*tmp;
 293         int i,j;
 294
 295         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 296         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
 297         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 298
 299         if (tmp == NULL)
 300                 {
 301                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
 302                         {
 303                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
 304                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
 305                         if (j < 0)
 306                                 {
 307                                 vs->current_method=j;
 308                                 return j;
 309                                 }
 310                         else if (j)
 311                                 {
 312                                 tmp= &stmp;
 313                                 break;
 314                                 }
 315                         }
 316                 vs->current_method=0;
 317                 if (tmp == NULL)
 318                         return 0;
 319                 }
 320
 321 /*      if (ret->data.ptr != NULL)
 322                 X509_OBJECT_free_contents(ret); */
 323
 324         ret->type=tmp->type;
 325         ret->data.ptr=tmp->data.ptr;
 326
 327         X509_OBJECT_up_ref_count(ret);
 328
 329         return 1;
 330         }
 331
 332 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 333         {
 334         X509_OBJECT *obj;
 335         int ret=1;
 336
 337         if (x == NULL) return 0;
 338         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 339         if (obj == NULL)
 340                 {
 341                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 342                 return 0;
 343                 }
 344         obj->type=X509_LU_X509;
 345         obj->data.x509=x;
 346
 347         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 348
 349         X509_OBJECT_up_ref_count(obj);
 350
 351         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 352                 {
 353                 X509_OBJECT_free_contents(obj);
 354                 OPENSSL_free(obj);
 355                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 356                 ret=0;
 357                 }
 358         else sk_X509_OBJECT_push(ctx->objs, obj);
 359
 360         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 361
 362         return ret;
 363         }
 364
 365 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 366         {
 367         X509_OBJECT *obj;
 368         int ret=1;
 369
 370         if (x == NULL) return 0;
 371         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 372         if (obj == NULL)
 373                 {
 374                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 375                 return 0;
 376                 }
 377         obj->type=X509_LU_CRL;
 378         obj->data.crl=x;
 379
 380         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 381
 382         X509_OBJECT_up_ref_count(obj);
 383
 384         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 385                 {
 386                 X509_OBJECT_free_contents(obj);
 387                 OPENSSL_free(obj);
 388                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 389                 ret=0;
 390                 }
 391         else sk_X509_OBJECT_push(ctx->objs, obj);
 392
 393         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 394
 395         return ret;
 396         }
 397
 398 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
 399         {
 400         switch (a->type)
 401                 {
 402         case X509_LU_X509:
 403                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
 404                 break;
 405         case X509_LU_CRL:
 406                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
 407                 break;
 408                 }
 409         }
 410
 411 void X509_OBJECT_free_contents(X509_OBJECT *a)
 412         {
 413         switch (a->type)
 414                 {
 415         case X509_LU_X509:
 416                 X509_free(a->data.x509);
 417                 break;
 418         case X509_LU_CRL:
 419                 X509_CRL_free(a->data.crl);
 420                 break;
 421                 }
 422         }
 423
 424 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 425              X509_NAME *name)
 426         {
 427         X509_OBJECT stmp;
 428         X509 x509_s;
 429         X509_CINF cinf_s;
 430         X509_CRL crl_s;
 431         X509_CRL_INFO crl_info_s;
 432
 433         stmp.type=type;
 434         switch (type)
 435                 {
 436         case X509_LU_X509:
 437                 stmp.data.x509= &x509_s;
 438                 x509_s.cert_info= &cinf_s;
 439                 cinf_s.subject=name;
 440                 break;
 441         case X509_LU_CRL:
 442                 stmp.data.crl= &crl_s;
 443                 crl_s.crl= &crl_info_s;
 444                 crl_info_s.issuer=name;
 445                 break;
 446         default:
 447                 /* abort(); */
 448                 return -1;
 449                 }
 450
 451         return sk_X509_OBJECT_find(h,&stmp);
 452         }
 453
 454 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 455              X509_NAME *name)
 456         {
 457         int idx;
 458         idx = X509_OBJECT_idx_by_subject(h, type, name);
 459         if (idx==-1) return NULL;
 460         return sk_X509_OBJECT_value(h, idx);
 461         }
 462
 463 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
 464         {
 465         int idx, i;
 466         X509_OBJECT *obj;
 467         idx = sk_X509_OBJECT_find(h, x);
 468         if (idx == -1) return NULL;
 469         if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx);
 470         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
 471                 {
 472                 obj = sk_X509_OBJECT_value(h, i);
 473                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 474                         return NULL;
 475                 if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509))
 476                         return obj;
 477                 }
 478         return NULL;
 479         }
 480
 481
 482 /* Try to get issuer certificate from store. Due to limitations
 483  * of the API this can only retrieve a single certificate matching
 484  * a given subject name. However it will fill the cache with all
 485  * matching certificates, so we can examine the cache for all
 486  * matches.
 487  *
 488  * Return values are:
 489  *  1 lookup successful.
 490  *  0 certificate not found.
 491  * -1 some other error.
 492  */
 493 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 494         {
 495         X509_NAME *xn;
 496         X509_OBJECT obj, *pobj;
 497         int i, ok, idx, ret;
 498         xn=X509_get_issuer_name(x);
 499         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 500         if (ok != X509_LU_X509)
 501                 {
 502                 if (ok == X509_LU_RETRY)
 503                         {
 504                         X509_OBJECT_free_contents(&obj);
 505                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
 506                         return -1;
 507                         }
 508                 else if (ok != X509_LU_FAIL)
 509                         {
 510                         X509_OBJECT_free_contents(&obj);
 511                         /* not good :-(, break anyway */
 512                         return -1;
 513                         }
 514                 return 0;
 515                 }
 516         /* If certificate matches all OK */
 517         if (ctx->check_issued(ctx, x, obj.data.x509))
 518                 {
 519                 *issuer = obj.data.x509;
 520                 return 1;
 521                 }
 522         X509_OBJECT_free_contents(&obj);
 523
 524         /* Else find index of first cert accepted by 'check_issued' */
 525         ret = 0;
 526         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 527         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 528         if (idx != -1) /* should be true as we've had at least one match */
 529                 {
 530                 /* Look through all matching certs for suitable issuer */
 531                 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
 532                         {
 533                         pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 534                         /* See if we've run past the matches */
 535                         if (pobj->type != X509_LU_X509)
 536                                 break;
 537                         if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
 538                                 break;
 539                         if (ctx->check_issued(ctx, x, pobj->data.x509))
 540                                 {
 541                                 *issuer = pobj->data.x509;
 542                                 X509_OBJECT_up_ref_count(pobj);
 543                                 ret = 1;
 544                                 break;
 545                                 }
 546                         }
 547                 }
 548         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 549         return ret;
 550         }
 551
 552 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
 553         {
 554         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
 555         }
 556
 557 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
 558         {
 559         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 560         return 1;
 561         }
 562
 563 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 564         {
 565         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
 566         }
 567
 568 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 569         {
 570         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
 571         }
 572
 573 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
 574         {
 575         return X509_VERIFY_PARAM_set1(ctx->param, param);
 576         }
 577
 578 IMPLEMENT_STACK_OF(X509_LOOKUP)
 579 IMPLEMENT_STACK_OF(X509_OBJECT)