crypto/x509/x509_vfy.c

   1 /* crypto/x509/x509_vfy.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 <time.h>
  61 #include <errno.h>
  62
  63 #include "cryptlib.h"
  64 #include <openssl/crypto.h>
  65 #include <openssl/lhash.h>
  66 #include <openssl/buffer.h>
  67 #include <openssl/evp.h>
  68 #include <openssl/asn1.h>
  69 #include <openssl/x509.h>
  70 #include <openssl/x509v3.h>
  71 #include <openssl/objects.h>
  72
  73 static int null_callback(int ok,X509_STORE_CTX *e);
  74 static int check_chain_purpose(X509_STORE_CTX *ctx);
  75 static int check_trust(X509_STORE_CTX *ctx);
  76 static int internal_verify(X509_STORE_CTX *ctx);
  77 const char *X509_version="X.509" OPENSSL_VERSION_PTEXT;
  78
  79 static STACK *x509_store_ctx_method=NULL;
  80 static int x509_store_ctx_num=0;
  81 #if 0
  82 static int x509_store_num=1;
  83 static STACK *x509_store_method=NULL;
  84 #endif
  85
  86 static int null_callback(int ok, X509_STORE_CTX *e)
  87         {
  88         return(ok);
  89         }
  90
  91 #if 0
  92 static int x509_subject_cmp(X509 **a, X509 **b)
  93         {
  94         return(X509_subject_name_cmp(*a,*b));
  95         }
  96 #endif
  97
  98 int X509_verify_cert(X509_STORE_CTX *ctx)
  99         {
 100         X509 *x,*xtmp,*chain_ss=NULL;
 101         X509_NAME *xn;
 102         X509_OBJECT obj;
 103         int depth,i,ok=0;
 104         int num;
 105         int (*cb)();
 106         STACK_OF(X509) *sktmp=NULL;
 107
 108         if (ctx->cert == NULL)
 109                 {
 110                 X509err(X509_F_X509_VERIFY_CERT,X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
 111                 return(-1);
 112                 }
 113
 114         cb=ctx->ctx->verify_cb;
 115         if (cb == NULL) cb=null_callback;
 116
 117         /* first we make sure the chain we are going to build is
 118          * present and that the first entry is in place */
 119         if (ctx->chain == NULL)
 120                 {
 121                 if (    ((ctx->chain=sk_X509_new_null()) == NULL) ||
 122                         (!sk_X509_push(ctx->chain,ctx->cert)))
 123                         {
 124                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 125                         goto end;
 126                         }
 127                 CRYPTO_add(&ctx->cert->references,1,CRYPTO_LOCK_X509);
 128                 ctx->last_untrusted=1;
 129                 }
 130
 131         /* We use a temporary STACK so we can chop and hack at it */
 132         if (ctx->untrusted != NULL
 133             && (sktmp=sk_X509_dup(ctx->untrusted)) == NULL)
 134                 {
 135                 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 136                 goto end;
 137                 }
 138
 139         num=sk_X509_num(ctx->chain);
 140         x=sk_X509_value(ctx->chain,num-1);
 141         depth=ctx->depth;
 142
 143
 144         for (;;)
 145                 {
 146                 /* If we have enough, we break */
 147                 if (depth < num) break; /* FIXME: If this happens, we should take
 148                                          * note of it and, if appropriate, use the
 149                                          * X509_V_ERR_CERT_CHAIN_TOO_LONG error
 150                                          * code later.
 151                                          */
 152
 153                 /* If we are self signed, we break */
 154                 xn=X509_get_issuer_name(x);
 155                 if (X509_NAME_cmp(X509_get_subject_name(x),xn) == 0)
 156                         break;
 157
 158                 /* If we were passed a cert chain, use it first */
 159                 if (ctx->untrusted != NULL)
 160                         {
 161                         xtmp=X509_find_by_subject(sktmp,xn);
 162                         if (xtmp != NULL)
 163                                 {
 164                                 if (!sk_X509_push(ctx->chain,xtmp))
 165                                         {
 166                                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 167                                         goto end;
 168                                         }
 169                                 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
 170                                 sk_X509_delete_ptr(sktmp,xtmp);
 171                                 ctx->last_untrusted++;
 172                                 x=xtmp;
 173                                 num++;
 174                                 /* reparse the full chain for
 175                                  * the next one */
 176                                 continue;
 177                                 }
 178                         }
 179                 break;
 180                 }
 181
 182         /* at this point, chain should contain a list of untrusted
 183          * certificates.  We now need to add at least one trusted one,
 184          * if possible, otherwise we complain. */
 185
 186         i=sk_X509_num(ctx->chain);
 187         x=sk_X509_value(ctx->chain,i-1);
 188         xn = X509_get_subject_name(x);
 189         if (X509_NAME_cmp(xn,X509_get_issuer_name(x))
 190                 == 0)
 191                 {
 192                 /* we have a self signed certificate */
 193                 if (sk_X509_num(ctx->chain) == 1)
 194                         {
 195                         /* We have a single self signed certificate: see if
 196                          * we can find it in the store. We must have an exact
 197                          * match to avoid possible impersonation.
 198                          */
 199                         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 200                         if ((ok != X509_LU_X509) || X509_cmp(x, obj.data.x509))
 201                                 {
 202                                 ctx->error=X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
 203                                 ctx->current_cert=x;
 204                                 ctx->error_depth=i-1;
 205                                 if(ok == X509_LU_X509) X509_OBJECT_free_contents(&obj);
 206                                 ok=cb(0,ctx);
 207                                 if (!ok) goto end;
 208                                 }
 209                         else
 210                                 {
 211                                 /* We have a match: replace certificate with store version
 212                                  * so we get any trust settings.
 213                                  */
 214                                 X509_free(x);
 215                                 x = obj.data.x509;
 216                                 sk_X509_set(ctx->chain, i - 1, x);
 217                                 ctx->last_untrusted=0;
 218                                 }
 219                         }
 220                 else
 221                         {
 222                         /* worry more about this one elsewhere */
 223                         chain_ss=sk_X509_pop(ctx->chain);
 224                         ctx->last_untrusted--;
 225                         num--;
 226                         x=sk_X509_value(ctx->chain,num-1);
 227                         }
 228                 }
 229
 230         /* We now lookup certs from the certificate store */
 231         for (;;)
 232                 {
 233                 /* If we have enough, we break */
 234                 if (depth < num) break;
 235
 236                 /* If we are self signed, we break */
 237                 xn=X509_get_issuer_name(x);
 238                 if (X509_NAME_cmp(X509_get_subject_name(x),xn) == 0)
 239                         break;
 240
 241                 ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 242                 if (ok != X509_LU_X509)
 243                         {
 244                         if (ok == X509_LU_RETRY)
 245                                 {
 246                                 X509_OBJECT_free_contents(&obj);
 247                                 X509err(X509_F_X509_VERIFY_CERT,X509_R_SHOULD_RETRY);
 248                                 return(ok);
 249                                 }
 250                         else if (ok != X509_LU_FAIL)
 251                                 {
 252                                 X509_OBJECT_free_contents(&obj);
 253                                 /* not good :-(, break anyway */
 254                                 return(ok);
 255                                 }
 256                         break;
 257                         }
 258                 x=obj.data.x509;
 259                 if (!sk_X509_push(ctx->chain,obj.data.x509))
 260                         {
 261                         X509_OBJECT_free_contents(&obj);
 262                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 263                         return(0);
 264                         }
 265                 num++;
 266                 }
 267
 268         /* we now have our chain, lets check it... */
 269         xn=X509_get_issuer_name(x);
 270         if (X509_NAME_cmp(X509_get_subject_name(x),xn) != 0)
 271                 {
 272                 if ((chain_ss == NULL) || (X509_NAME_cmp(X509_get_subject_name(chain_ss),xn) != 0))
 273                         {
 274                         if (ctx->last_untrusted >= num)
 275                                 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
 276                         else
 277                                 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
 278                         ctx->current_cert=x;
 279                         }
 280                 else
 281                         {
 282
 283                         sk_X509_push(ctx->chain,chain_ss);
 284                         num++;
 285                         ctx->last_untrusted=num;
 286                         ctx->current_cert=chain_ss;
 287                         ctx->error=X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
 288                         chain_ss=NULL;
 289                         }
 290
 291                 ctx->error_depth=num-1;
 292                 ok=cb(0,ctx);
 293                 if (!ok) goto end;
 294                 }
 295
 296         /* We have the chain complete: now we need to check its purpose */
 297         if(ctx->purpose > 0) ok = check_chain_purpose(ctx);
 298
 299         if(!ok) goto end;
 300
 301         /* The chain extensions are OK: check trust */
 302
 303         if(ctx->trust > 0) ok = check_trust(ctx);
 304
 305         if(!ok) goto end;
 306
 307         /* We may as well copy down any DSA parameters that are required */
 308         X509_get_pubkey_parameters(NULL,ctx->chain);
 309
 310         /* At this point, we have a chain and just need to verify it */
 311         if (ctx->ctx->verify != NULL)
 312                 ok=ctx->ctx->verify(ctx);
 313         else
 314                 ok=internal_verify(ctx);
 315         if (0)
 316                 {
 317 end:
 318                 X509_get_pubkey_parameters(NULL,ctx->chain);
 319                 }
 320         if (sktmp != NULL) sk_X509_free(sktmp);
 321         if (chain_ss != NULL) X509_free(chain_ss);
 322         return(ok);
 323         }
 324
 325 /* Check a certificate chains extensions for consistency
 326  * with the supplied purpose
 327  */
 328
 329 static int check_chain_purpose(X509_STORE_CTX *ctx)
 330 {
 331 #ifdef NO_CHAIN_VERIFY
 332         return 1;
 333 #else
 334         int i, ok=0;
 335         X509 *x;
 336         int (*cb)();
 337         cb=ctx->ctx->verify_cb;
 338         if (cb == NULL) cb=null_callback;
 339         /* Check all untrusted certificates */
 340         for(i = 0; i < ctx->last_untrusted; i++) {
 341                 x = sk_X509_value(ctx->chain, i);
 342                 if(!X509_check_purpose(x, ctx->purpose, i)) {
 343                         if(i) ctx->error = X509_V_ERR_INVALID_CA;
 344                         else ctx->error = X509_V_ERR_INVALID_PURPOSE;
 345                         ctx->error_depth = i;
 346                         ctx->current_cert = x;
 347                         ok=cb(0,ctx);
 348                         if(!ok) goto end;
 349                 }
 350                 /* Check pathlen */
 351                 if((i > 1) && (x->ex_pathlen != -1)
 352                                         && (i > (x->ex_pathlen + 1))) {
 353                         ctx->error = X509_V_ERR_PATH_LENGTH_EXCEEDED;
 354                         ctx->error_depth = i;
 355                         ctx->current_cert = x;
 356                         ok=cb(0,ctx);
 357                         if(!ok) goto end;
 358                 }
 359         }
 360         ok = 1;
 361         end:
 362         return(ok);
 363 #endif
 364 }
 365
 366 static int check_trust(X509_STORE_CTX *ctx)
 367 {
 368 #ifdef NO_CHAIN_VERIFY
 369         return 1;
 370 #else
 371         int i, ok;
 372         X509 *x;
 373         int (*cb)();
 374         cb=ctx->ctx->verify_cb;
 375         if (cb == NULL) cb=null_callback;
 376 /* For now just check the last certificate in the chain */
 377         i = sk_X509_num(ctx->chain) - 1;
 378         x = sk_X509_value(ctx->chain, i);
 379         ok = X509_check_trust(x, ctx->trust, 0);
 380         if(ok == X509_TRUST_TRUSTED) return 1;
 381         ctx->error_depth = sk_X509_num(ctx->chain) - 1;
 382         ctx->current_cert = x;
 383         if(ok == X509_TRUST_REJECTED) ctx->error = X509_V_ERR_CERT_REJECTED;
 384         else ctx->error = X509_V_ERR_CERT_UNTRUSTED;
 385         ok = cb(0, ctx);
 386         return(ok);
 387 #endif
 388 }
 389
 390 static int internal_verify(X509_STORE_CTX *ctx)
 391         {
 392         int i,ok=0,n;
 393         X509 *xs,*xi;
 394         EVP_PKEY *pkey=NULL;
 395         int (*cb)();
 396
 397         cb=ctx->ctx->verify_cb;
 398         if (cb == NULL) cb=null_callback;
 399
 400         n=sk_X509_num(ctx->chain);
 401         ctx->error_depth=n-1;
 402         n--;
 403         xi=sk_X509_value(ctx->chain,n);
 404         if (X509_NAME_cmp(X509_get_subject_name(xi),
 405                 X509_get_issuer_name(xi)) == 0)
 406                 xs=xi;
 407         else
 408                 {
 409                 if (n <= 0)
 410                         {
 411                         ctx->error=X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
 412                         ctx->current_cert=xi;
 413                         ok=cb(0,ctx);
 414                         goto end;
 415                         }
 416                 else
 417                         {
 418                         n--;
 419                         ctx->error_depth=n;
 420                         xs=sk_X509_value(ctx->chain,n);
 421                         }
 422                 }
 423
 424 /*      ctx->error=0;  not needed */
 425         while (n >= 0)
 426                 {
 427                 ctx->error_depth=n;
 428                 if (!xs->valid)
 429                         {
 430                         if ((pkey=X509_get_pubkey(xi)) == NULL)
 431                                 {
 432                                 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
 433                                 ctx->current_cert=xi;
 434                                 ok=(*cb)(0,ctx);
 435                                 if (!ok) goto end;
 436                                 }
 437                         if (X509_verify(xs,pkey) <= 0)
 438                                 {
 439                                 EVP_PKEY_free(pkey);
 440                                 ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
 441                                 ctx->current_cert=xs;
 442                                 ok=(*cb)(0,ctx);
 443                                 if (!ok) goto end;
 444                                 }
 445                         EVP_PKEY_free(pkey);
 446                         pkey=NULL;
 447
 448                         i=X509_cmp_current_time(X509_get_notBefore(xs));
 449                         if (i == 0)
 450                                 {
 451                                 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
 452                                 ctx->current_cert=xs;
 453                                 ok=(*cb)(0,ctx);
 454                                 if (!ok) goto end;
 455                                 }
 456                         if (i > 0)
 457                                 {
 458                                 ctx->error=X509_V_ERR_CERT_NOT_YET_VALID;
 459                                 ctx->current_cert=xs;
 460                                 ok=(*cb)(0,ctx);
 461                                 if (!ok) goto end;
 462                                 }
 463                         xs->valid=1;
 464                         }
 465
 466                 i=X509_cmp_current_time(X509_get_notAfter(xs));
 467                 if (i == 0)
 468                         {
 469                         ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
 470                         ctx->current_cert=xs;
 471                         ok=(*cb)(0,ctx);
 472                         if (!ok) goto end;
 473                         }
 474
 475                 if (i < 0)
 476                         {
 477                         ctx->error=X509_V_ERR_CERT_HAS_EXPIRED;
 478                         ctx->current_cert=xs;
 479                         ok=(*cb)(0,ctx);
 480                         if (!ok) goto end;
 481                         }
 482
 483                 /* CRL CHECK */
 484
 485                 /* The last error (if any) is still in the error value */
 486                 ctx->current_cert=xs;
 487                 ok=(*cb)(1,ctx);
 488                 if (!ok) goto end;
 489
 490                 n--;
 491                 if (n >= 0)
 492                         {
 493                         xi=xs;
 494                         xs=sk_X509_value(ctx->chain,n);
 495                         }
 496                 }
 497         ok=1;
 498 end:
 499         return(ok);
 500         }
 501
 502 int X509_cmp_current_time(ASN1_UTCTIME *ctm)
 503         {
 504         char *str;
 505         ASN1_UTCTIME atm;
 506         time_t offset;
 507         char buff1[24],buff2[24],*p;
 508         int i,j;
 509
 510         p=buff1;
 511         i=ctm->length;
 512         str=(char *)ctm->data;
 513         if ((i < 11) || (i > 17)) return(0);
 514         memcpy(p,str,10);
 515         p+=10;
 516         str+=10;
 517
 518         if ((*str == 'Z') || (*str == '-') || (*str == '+'))
 519                 { *(p++)='0'; *(p++)='0'; }
 520         else    { *(p++)= *(str++); *(p++)= *(str++); }
 521         *(p++)='Z';
 522         *(p++)='\0';
 523
 524         if (*str == 'Z')
 525                 offset=0;
 526         else
 527                 {
 528                 if ((*str != '+') && (str[5] != '-'))
 529                         return(0);
 530                 offset=((str[1]-'0')*10+(str[2]-'0'))*60;
 531                 offset+=(str[3]-'0')*10+(str[4]-'0');
 532                 if (*str == '-')
 533                         offset= -offset;
 534                 }
 535         atm.type=V_ASN1_UTCTIME;
 536         atm.length=sizeof(buff2);
 537         atm.data=(unsigned char *)buff2;
 538
 539         X509_gmtime_adj(&atm,-offset);
 540
 541         i=(buff1[0]-'0')*10+(buff1[1]-'0');
 542         if (i < 50) i+=100; /* cf. RFC 2459 */
 543         j=(buff2[0]-'0')*10+(buff2[1]-'0');
 544         if (j < 50) j+=100;
 545
 546         if (i < j) return (-1);
 547         if (i > j) return (1);
 548         i=strcmp(buff1,buff2);
 549         if (i == 0) /* wait a second then return younger :-) */
 550                 return(-1);
 551         else
 552                 return(i);
 553         }
 554
 555 ASN1_UTCTIME *X509_gmtime_adj(ASN1_UTCTIME *s, long adj)
 556         {
 557         time_t t;
 558
 559         time(&t);
 560         t+=adj;
 561         return(ASN1_UTCTIME_set(s,t));
 562         }
 563
 564 int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain)
 565         {
 566         EVP_PKEY *ktmp=NULL,*ktmp2;
 567         int i,j;
 568
 569         if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) return(1);
 570
 571         for (i=0; i<sk_X509_num(chain); i++)
 572                 {
 573                 ktmp=X509_get_pubkey(sk_X509_value(chain,i));
 574                 if (ktmp == NULL)
 575                         {
 576                         X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY);
 577                         return(0);
 578                         }
 579                 if (!EVP_PKEY_missing_parameters(ktmp))
 580                         break;
 581                 else
 582                         {
 583                         EVP_PKEY_free(ktmp);
 584                         ktmp=NULL;
 585                         }
 586                 }
 587         if (ktmp == NULL)
 588                 {
 589                 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN);
 590                 return(0);
 591                 }
 592
 593         /* first, populate the other certs */
 594         for (j=i-1; j >= 0; j--)
 595                 {
 596                 ktmp2=X509_get_pubkey(sk_X509_value(chain,j));
 597                 EVP_PKEY_copy_parameters(ktmp2,ktmp);
 598                 EVP_PKEY_free(ktmp2);
 599                 }
 600
 601         if (pkey != NULL) EVP_PKEY_copy_parameters(pkey,ktmp);
 602         EVP_PKEY_free(ktmp);
 603         return(1);
 604         }
 605
 606 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 607         {
 608         X509_OBJECT *obj,*r;
 609         int ret=1;
 610
 611         if (x == NULL) return(0);
 612         obj=(X509_OBJECT *)Malloc(sizeof(X509_OBJECT));
 613         if (obj == NULL)
 614                 {
 615                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 616                 return(0);
 617                 }
 618         obj->type=X509_LU_X509;
 619         obj->data.x509=x;
 620
 621         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 622
 623         X509_OBJECT_up_ref_count(obj);
 624
 625         r=(X509_OBJECT *)lh_insert(ctx->certs,(char *)obj);
 626         if (r != NULL)
 627                 { /* oops, put it back */
 628                 lh_delete(ctx->certs,(char *)obj);
 629                 X509_OBJECT_free_contents(obj);
 630                 Free(obj);
 631                 lh_insert(ctx->certs,(char *)r);
 632                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 633                 ret=0;
 634                 }
 635
 636         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 637
 638         return(ret);
 639         }
 640
 641 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 642         {
 643         X509_OBJECT *obj,*r;
 644         int ret=1;
 645
 646         if (x == NULL) return(0);
 647         obj=(X509_OBJECT *)Malloc(sizeof(X509_OBJECT));
 648         if (obj == NULL)
 649                 {
 650                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 651                 return(0);
 652                 }
 653         obj->type=X509_LU_CRL;
 654         obj->data.crl=x;
 655
 656         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 657
 658         X509_OBJECT_up_ref_count(obj);
 659
 660         r=(X509_OBJECT *)lh_insert(ctx->certs,(char *)obj);
 661         if (r != NULL)
 662                 { /* oops, put it back */
 663                 lh_delete(ctx->certs,(char *)obj);
 664                 X509_OBJECT_free_contents(obj);
 665                 Free(obj);
 666                 lh_insert(ctx->certs,(char *)r);
 667                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 668                 ret=0;
 669                 }
 670
 671         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 672
 673         return(ret);
 674         }
 675
 676 int X509_STORE_CTX_get_ex_new_index(long argl, char *argp, int (*new_func)(),
 677              int (*dup_func)(), void (*free_func)())
 678         {
 679         x509_store_ctx_num++;
 680         return(CRYPTO_get_ex_new_index(x509_store_ctx_num-1,
 681                 &x509_store_ctx_method,
 682                 argl,argp,new_func,dup_func,free_func));
 683         }
 684
 685 int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *ctx, int idx, void *data)
 686         {
 687         return(CRYPTO_set_ex_data(&ctx->ex_data,idx,data));
 688         }
 689
 690 void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *ctx, int idx)
 691         {
 692         return(CRYPTO_get_ex_data(&ctx->ex_data,idx));
 693         }
 694
 695 int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx)
 696         {
 697         return(ctx->error);
 698         }
 699
 700 void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx, int err)
 701         {
 702         ctx->error=err;
 703         }
 704
 705 int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx)
 706         {
 707         return(ctx->error_depth);
 708         }
 709
 710 X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx)
 711         {
 712         return(ctx->current_cert);
 713         }
 714
 715 STACK_OF(X509) *X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx)
 716         {
 717         return(ctx->chain);
 718         }
 719
 720 STACK_OF(X509) *X509_STORE_CTX_rget_chain(X509_STORE_CTX *ctx)
 721         {
 722         int i;
 723         X509 *x;
 724         STACK_OF(X509) *chain;
 725         if(!ctx->chain || !(chain = sk_X509_dup(ctx->chain))) return NULL;
 726         for(i = 0; i < sk_X509_num(chain); i++) {
 727                 x = sk_X509_value(chain, i);
 728                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
 729         }
 730         return(chain);
 731         }
 732
 733 void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x)
 734         {
 735         ctx->cert=x;
 736         }
 737
 738 void X509_STORE_CTX_set_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
 739         {
 740         ctx->untrusted=sk;
 741         }
 742
 743 int X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose)
 744         {
 745         return X509_STORE_CTX_purpose_inherit(ctx, 0, purpose, 0);
 746         }
 747
 748 int X509_STORE_CTX_set_trust(X509_STORE_CTX *ctx, int trust)
 749         {
 750         return X509_STORE_CTX_purpose_inherit(ctx, 0, 0, trust);
 751         }
 752
 753 /* This function is used to set the X509_STORE_CTX purpose and trust
 754  * values. This is intended to be used when another structure has its
 755  * own trust and purpose values which (if set) will be inherited by
 756  * the ctx. If they aren't set then we will usually have a default
 757  * purpose in mind which should then be used to set the trust value.
 758  * An example of this is SSL use: an SSL structure will have its own
 759  * purpose and trust settings which the application can set: if they
 760  * aren't set then we use the default of SSL client/server.
 761  */
 762
 763 int X509_STORE_CTX_purpose_inherit(X509_STORE_CTX *ctx, int def_purpose,
 764                                 int purpose, int trust)
 765 {
 766         int idx;
 767         /* If purpose not set use default */
 768         if(!purpose) purpose = def_purpose;
 769         /* If we have a purpose then check it is valid */
 770         if(purpose) {
 771                 idx = X509_PURPOSE_get_by_id(purpose);
 772                 if(idx == -1) {
 773                         X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
 774                                                 X509_R_UNKNOWN_PURPOSE_ID);
 775                         return 0;
 776                 }
 777                 /* If trust not set then get from purpose default */
 778                 if(!trust) {
 779                         X509_PURPOSE *ptmp;
 780                         ptmp = X509_PURPOSE_iget(idx);
 781                         trust = ptmp->trust;
 782                 }
 783         }
 784         if(trust) {
 785                 idx = X509_TRUST_get_by_id(trust);
 786                 if(idx == -1) {
 787                         X509err(X509_F_X509_STORE_CTX_PURPOSE_INHERIT,
 788                                                 X509_R_UNKNOWN_TRUST_ID);
 789                         return 0;
 790                 }
 791         }
 792
 793         if(purpose) ctx->purpose = purpose;
 794         if(trust) ctx->trust = trust;
 795         return 1;
 796 }
 797
 798
 799 IMPLEMENT_STACK_OF(X509)
 800 IMPLEMENT_ASN1_SET_OF(X509)
 801
 802 IMPLEMENT_STACK_OF(X509_NAME)
 803
 804 IMPLEMENT_STACK_OF(X509_ATTRIBUTE)
 805 IMPLEMENT_ASN1_SET_OF(X509_ATTRIBUTE)