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 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *x509_store_meth=NULL;
  66
  67 X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
  68         {
  69         X509_LOOKUP *ret;
  70
  71         ret=(X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP));
  72         if (ret == NULL) return NULL;
  73
  74         ret->init=0;
  75         ret->skip=0;
  76         ret->method=method;
  77         ret->method_data=NULL;
  78         ret->store_ctx=NULL;
  79         if ((method->new_item != NULL) && !method->new_item(ret))
  80                 {
  81                 OPENSSL_free(ret);
  82                 return NULL;
  83                 }
  84         return ret;
  85         }
  86
  87 void X509_LOOKUP_free(X509_LOOKUP *ctx)
  88         {
  89         if (ctx == NULL) return;
  90         if (    (ctx->method != NULL) &&
  91                 (ctx->method->free != NULL))
  92                 ctx->method->free(ctx);
  93         OPENSSL_free(ctx);
  94         }
  95
  96 int X509_LOOKUP_init(X509_LOOKUP *ctx)
  97         {
  98         if (ctx->method == NULL) return 0;
  99         if (ctx->method->init != NULL)
 100                 return ctx->method->init(ctx);
 101         else
 102                 return 1;
 103         }
 104
 105 int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
 106         {
 107         if (ctx->method == NULL) return 0;
 108         if (ctx->method->shutdown != NULL)
 109                 return ctx->method->shutdown(ctx);
 110         else
 111                 return 1;
 112         }
 113
 114 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
 115              char **ret)
 116         {
 117         if (ctx->method == NULL) return -1;
 118         if (ctx->method->ctrl != NULL)
 119                 return ctx->method->ctrl(ctx,cmd,argc,argl,ret);
 120         else
 121                 return 1;
 122         }
 123
 124 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
 125              X509_OBJECT *ret)
 126         {
 127         if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
 128                 return X509_LU_FAIL;
 129         if (ctx->skip) return 0;
 130         return ctx->method->get_by_subject(ctx,type,name,ret);
 131         }
 132
 133 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
 134              ASN1_INTEGER *serial, X509_OBJECT *ret)
 135         {
 136         if ((ctx->method == NULL) ||
 137                 (ctx->method->get_by_issuer_serial == NULL))
 138                 return X509_LU_FAIL;
 139         return ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret);
 140         }
 141
 142 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
 143              unsigned char *bytes, int len, X509_OBJECT *ret)
 144         {
 145         if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
 146                 return X509_LU_FAIL;
 147         return ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret);
 148         }
 149
 150 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
 151              X509_OBJECT *ret)
 152         {
 153         if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
 154                 return X509_LU_FAIL;
 155         return ctx->method->get_by_alias(ctx,type,str,len,ret);
 156         }
 157
 158
 159 static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b)
 160         {
 161         int ret;
 162
 163         ret=((*a)->type - (*b)->type);
 164         if (ret) return ret;
 165         switch ((*a)->type)
 166                 {
 167         case X509_LU_X509:
 168                 ret=X509_subject_name_cmp((*a)->data.x509,(*b)->data.x509);
 169                 break;
 170         case X509_LU_CRL:
 171                 ret=X509_CRL_cmp((*a)->data.crl,(*b)->data.crl);
 172                 break;
 173         default:
 174                 /* abort(); */
 175                 return 0;
 176                 }
 177         return ret;
 178         }
 179
 180 X509_STORE *X509_STORE_new(void)
 181         {
 182         X509_STORE *ret;
 183
 184         if ((ret=(X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL)
 185                 return NULL;
 186         ret->objs = sk_X509_OBJECT_new(x509_object_cmp);
 187         ret->cache=1;
 188         ret->get_cert_methods=sk_X509_LOOKUP_new_null();
 189         ret->verify=0;
 190         ret->verify_cb=0;
 191
 192         ret->purpose = 0;
 193         ret->trust = 0;
 194
 195         ret->flags = 0;
 196
 197         ret->get_issuer = 0;
 198         ret->check_issued = 0;
 199         ret->check_revocation = 0;
 200         ret->get_crl = 0;
 201         ret->check_crl = 0;
 202         ret->cert_crl = 0;
 203         ret->cleanup = 0;
 204
 205         memset(&ret->ex_data,0,sizeof(CRYPTO_EX_DATA));
 206         ret->references=1;
 207         ret->depth=0;
 208         return ret;
 209         }
 210
 211 static void cleanup(X509_OBJECT *a)
 212         {
 213         if (a->type == X509_LU_X509)
 214                 {
 215                 X509_free(a->data.x509);
 216                 }
 217         else if (a->type == X509_LU_CRL)
 218                 {
 219                 X509_CRL_free(a->data.crl);
 220                 }
 221         else
 222                 {
 223                 /* abort(); */
 224                 }
 225
 226         OPENSSL_free(a);
 227         }
 228
 229 void X509_STORE_free(X509_STORE *vfy)
 230         {
 231         int i;
 232         STACK_OF(X509_LOOKUP) *sk;
 233         X509_LOOKUP *lu;
 234
 235         if (vfy == NULL)
 236             return;
 237
 238         sk=vfy->get_cert_methods;
 239         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 240                 {
 241                 lu=sk_X509_LOOKUP_value(sk,i);
 242                 X509_LOOKUP_shutdown(lu);
 243                 X509_LOOKUP_free(lu);
 244                 }
 245         sk_X509_LOOKUP_free(sk);
 246         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
 247
 248         CRYPTO_free_ex_data(x509_store_meth,vfy,&vfy->ex_data);
 249         OPENSSL_free(vfy);
 250         }
 251
 252 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
 253         {
 254         int i;
 255         STACK_OF(X509_LOOKUP) *sk;
 256         X509_LOOKUP *lu;
 257
 258         sk=v->get_cert_methods;
 259         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
 260                 {
 261                 lu=sk_X509_LOOKUP_value(sk,i);
 262                 if (m == lu->method)
 263                         {
 264                         return lu;
 265                         }
 266                 }
 267         /* a new one */
 268         lu=X509_LOOKUP_new(m);
 269         if (lu == NULL)
 270                 return NULL;
 271         else
 272                 {
 273                 lu->store_ctx=v;
 274                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
 275                         return lu;
 276                 else
 277                         {
 278                         X509_LOOKUP_free(lu);
 279                         return NULL;
 280                         }
 281                 }
 282         }
 283
 284 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
 285              X509_OBJECT *ret)
 286         {
 287         X509_STORE *ctx=vs->ctx;
 288         X509_LOOKUP *lu;
 289         X509_OBJECT stmp,*tmp;
 290         int i,j;
 291
 292         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
 293
 294         if (tmp == NULL)
 295                 {
 296                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
 297                         {
 298                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
 299                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
 300                         if (j < 0)
 301                                 {
 302                                 vs->current_method=j;
 303                                 return j;
 304                                 }
 305                         else if (j)
 306                                 {
 307                                 tmp= &stmp;
 308                                 break;
 309                                 }
 310                         }
 311                 vs->current_method=0;
 312                 if (tmp == NULL)
 313                         return 0;
 314                 }
 315
 316 /*      if (ret->data.ptr != NULL)
 317                 X509_OBJECT_free_contents(ret); */
 318
 319         ret->type=tmp->type;
 320         ret->data.ptr=tmp->data.ptr;
 321
 322         X509_OBJECT_up_ref_count(ret);
 323
 324         return 1;
 325         }
 326
 327 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 328         {
 329         X509_OBJECT *obj;
 330         int ret=1;
 331
 332         if (x == NULL) return 0;
 333         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 334         if (obj == NULL)
 335                 {
 336                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 337                 return 0;
 338                 }
 339         obj->type=X509_LU_X509;
 340         obj->data.x509=x;
 341
 342         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 343
 344         X509_OBJECT_up_ref_count(obj);
 345
 346
 347         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 348                 {
 349                 X509_OBJECT_free_contents(obj);
 350                 OPENSSL_free(obj);
 351                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 352                 ret=0;
 353                 }
 354         else sk_X509_OBJECT_push(ctx->objs, obj);
 355
 356         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 357
 358         return ret;
 359         }
 360
 361 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 362         {
 363         X509_OBJECT *obj;
 364         int ret=1;
 365
 366         if (x == NULL) return 0;
 367         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
 368         if (obj == NULL)
 369                 {
 370                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 371                 return 0;
 372                 }
 373         obj->type=X509_LU_CRL;
 374         obj->data.crl=x;
 375
 376         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 377
 378         X509_OBJECT_up_ref_count(obj);
 379
 380         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
 381                 {
 382                 X509_OBJECT_free_contents(obj);
 383                 OPENSSL_free(obj);
 384                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 385                 ret=0;
 386                 }
 387         else sk_X509_OBJECT_push(ctx->objs, obj);
 388
 389         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 390
 391         return ret;
 392         }
 393
 394 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
 395         {
 396         switch (a->type)
 397                 {
 398         case X509_LU_X509:
 399                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
 400                 break;
 401         case X509_LU_CRL:
 402                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
 403                 break;
 404                 }
 405         }
 406
 407 void X509_OBJECT_free_contents(X509_OBJECT *a)
 408         {
 409         switch (a->type)
 410                 {
 411         case X509_LU_X509:
 412                 X509_free(a->data.x509);
 413                 break;
 414         case X509_LU_CRL:
 415                 X509_CRL_free(a->data.crl);
 416                 break;
 417                 }
 418         }
 419
 420 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 421              X509_NAME *name)
 422         {
 423         X509_OBJECT stmp;
 424         X509 x509_s;
 425         X509_CINF cinf_s;
 426         X509_CRL crl_s;
 427         X509_CRL_INFO crl_info_s;
 428
 429         stmp.type=type;
 430         switch (type)
 431                 {
 432         case X509_LU_X509:
 433                 stmp.data.x509= &x509_s;
 434                 x509_s.cert_info= &cinf_s;
 435                 cinf_s.subject=name;
 436                 break;
 437         case X509_LU_CRL:
 438                 stmp.data.crl= &crl_s;
 439                 crl_s.crl= &crl_info_s;
 440                 crl_info_s.issuer=name;
 441                 break;
 442         default:
 443                 /* abort(); */
 444                 return -1;
 445                 }
 446
 447         return sk_X509_OBJECT_find(h,&stmp);
 448         }
 449
 450 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
 451              X509_NAME *name)
 452 {
 453         int idx;
 454         idx = X509_OBJECT_idx_by_subject(h, type, name);
 455         if (idx==-1) return NULL;
 456         return sk_X509_OBJECT_value(h, idx);
 457 }
 458
 459 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
 460 {
 461         int idx, i;
 462         X509_OBJECT *obj;
 463         idx = sk_X509_OBJECT_find(h, x);
 464         if (idx == -1) return NULL;
 465         if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx);
 466         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
 467                 {
 468                 obj = sk_X509_OBJECT_value(h, i);
 469                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
 470                         return NULL;
 471                 if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509))
 472                         return obj;
 473                 }
 474         return NULL;
 475 }
 476
 477
 478 /* Try to get issuer certificate from store. Due to limitations
 479  * of the API this can only retrieve a single certificate matching
 480  * a given subject name. However it will fill the cache with all
 481  * matching certificates, so we can examine the cache for all
 482  * matches.
 483  *
 484  * Return values are:
 485  *  1 lookup successful.
 486  *  0 certificate not found.
 487  * -1 some other error.
 488  */
 489
 490
 491 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
 492 {
 493         X509_NAME *xn;
 494         X509_OBJECT obj, *pobj;
 495         int i, ok, idx;
 496         xn=X509_get_issuer_name(x);
 497         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 498         if (ok != X509_LU_X509)
 499                 {
 500                 if (ok == X509_LU_RETRY)
 501                         {
 502                         X509_OBJECT_free_contents(&obj);
 503                         X509err(X509_F_X509_VERIFY_CERT,X509_R_SHOULD_RETRY);
 504                         return -1;
 505                         }
 506                 else if (ok != X509_LU_FAIL)
 507                         {
 508                         X509_OBJECT_free_contents(&obj);
 509                         /* not good :-(, break anyway */
 510                         return -1;
 511                         }
 512                 return 0;
 513                 }
 514         /* If certificate matches all OK */
 515         if (ctx->check_issued(ctx, x, obj.data.x509))
 516                 {
 517                 *issuer = obj.data.x509;
 518                 return 1;
 519                 }
 520         X509_OBJECT_free_contents(&obj);
 521         /* Else find index of first matching cert */
 522         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
 523         /* This shouldn't normally happen since we already have one match */
 524         if (idx == -1) return 0;
 525
 526         /* Look through all matching certificates for a suitable issuer */
 527         for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
 528                 {
 529                 pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
 530                 /* See if we've ran out of matches */
 531                 if (pobj->type != X509_LU_X509) return 0;
 532                 if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0;
 533                 if (ctx->check_issued(ctx, x, pobj->data.x509))
 534                         {
 535                         *issuer = pobj->data.x509;
 536                         X509_OBJECT_up_ref_count(pobj);
 537                         return 1;
 538                         }
 539                 }
 540         return 0;
 541 }
 542
 543 void X509_STORE_set_flags(X509_STORE *ctx, long flags)
 544         {
 545         ctx->flags |= flags;
 546         }
 547
 548 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
 549         {
 550         return X509_PURPOSE_set(&ctx->purpose, purpose);
 551         }
 552
 553 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
 554         {
 555         return X509_TRUST_set(&ctx->trust, trust);
 556         }
 557
 558 IMPLEMENT_STACK_OF(X509_LOOKUP)
 559 IMPLEMENT_STACK_OF(X509_OBJECT)