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 #include <sys/types.h>
  63 #include <sys/stat.h>
  64
  65 #include <openssl/crypto.h>
  66 #include "cryptlib.h"
  67 #include <openssl/lhash.h>
  68 #include <openssl/buffer.h>
  69 #include <openssl/evp.h>
  70 #include <openssl/asn1.h>
  71 #include <openssl/x509.h>
  72 #include <openssl/objects.h>
  73
  74 static int null_callback(int ok,X509_STORE_CTX *e);
  75 static int internal_verify(X509_STORE_CTX *ctx);
  76 const char *X509_version="X.509" OPENSSL_VERSION_PTEXT;
  77
  78 static STACK *x509_store_ctx_method=NULL;
  79 static int x509_store_ctx_num=0;
  80 #if 0
  81 static int x509_store_num=1;
  82 static STACK *x509_store_method=NULL;
  83 #endif
  84
  85 static int null_callback(int ok, X509_STORE_CTX *e)
  86         {
  87         return(ok);
  88         }
  89
  90 #if 0
  91 static int x509_subject_cmp(X509 **a, X509 **b)
  92         {
  93         return(X509_subject_name_cmp(*a,*b));
  94         }
  95 #endif
  96
  97 int X509_verify_cert(X509_STORE_CTX *ctx)
  98         {
  99         X509 *x,*xtmp,*chain_ss=NULL;
 100         X509_NAME *xn;
 101         X509_OBJECT obj;
 102         int depth,i,ok=0;
 103         int num;
 104         int (*cb)();
 105         STACK_OF(X509) *sktmp=NULL;
 106
 107         if (ctx->cert == NULL)
 108                 {
 109                 X509err(X509_F_X509_VERIFY_CERT,X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
 110                 return(-1);
 111                 }
 112
 113         cb=ctx->ctx->verify_cb;
 114         if (cb == NULL) cb=null_callback;
 115
 116         /* first we make sure the chain we are going to build is
 117          * present and that the first entry is in place */
 118         if (ctx->chain == NULL)
 119                 {
 120                 if (    ((ctx->chain=sk_X509_new_null()) == NULL) ||
 121                         (!sk_X509_push(ctx->chain,ctx->cert)))
 122                         {
 123                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 124                         goto end;
 125                         }
 126                 CRYPTO_add(&ctx->cert->references,1,CRYPTO_LOCK_X509);
 127                 ctx->last_untrusted=1;
 128                 }
 129
 130         /* We use a temporary so we can chop and hack at it */
 131         if (ctx->untrusted != NULL
 132             && (sktmp=sk_X509_dup(ctx->untrusted)) == NULL)
 133                 {
 134                 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 135                 goto end;
 136                 }
 137
 138         num=sk_X509_num(ctx->chain);
 139         x=sk_X509_value(ctx->chain,num-1);
 140         depth=ctx->depth;
 141
 142
 143         for (;;)
 144                 {
 145                 /* If we have enough, we break */
 146                 if (depth < num) break; /* FIXME: If this happens, we should take
 147                                          * note of it and, if appropriate, use the
 148                                          * X509_V_ERR_CERT_CHAIN_TOO_LONG error
 149                                          * code later.
 150                                          */
 151
 152                 /* If we are self signed, we break */
 153                 xn=X509_get_issuer_name(x);
 154                 if (X509_NAME_cmp(X509_get_subject_name(x),xn) == 0)
 155                         break;
 156
 157                 /* If we were passed a cert chain, use it first */
 158                 if (ctx->untrusted != NULL)
 159                         {
 160                         xtmp=X509_find_by_subject(sktmp,xn);
 161                         if (xtmp != NULL)
 162                                 {
 163                                 if (!sk_X509_push(ctx->chain,xtmp))
 164                                         {
 165                                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 166                                         goto end;
 167                                         }
 168                                 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
 169                                 sk_X509_delete_ptr(sktmp,xtmp);
 170                                 ctx->last_untrusted++;
 171                                 x=xtmp;
 172                                 num++;
 173                                 /* reparse the full chain for
 174                                  * the next one */
 175                                 continue;
 176                                 }
 177                         }
 178                 break;
 179                 }
 180
 181         /* at this point, chain should contain a list of untrusted
 182          * certificates.  We now need to add at least one trusted one,
 183          * if possible, otherwise we complain. */
 184
 185         i=sk_X509_num(ctx->chain);
 186         x=sk_X509_value(ctx->chain,i-1);
 187         if (X509_NAME_cmp(X509_get_subject_name(x),X509_get_issuer_name(x))
 188                 == 0)
 189                 {
 190                 /* we have a self signed certificate */
 191                 if (sk_X509_num(ctx->chain) == 1)
 192                         {
 193                         ctx->error=X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
 194                         ctx->current_cert=x;
 195                         ctx->error_depth=i-1;
 196                         ok=cb(0,ctx);
 197                         if (!ok) goto end;
 198                         }
 199                 else
 200                         {
 201                         /* worry more about this one elsewhere */
 202                         chain_ss=sk_X509_pop(ctx->chain);
 203                         ctx->last_untrusted--;
 204                         num--;
 205                         x=sk_X509_value(ctx->chain,num-1);
 206                         }
 207                 }
 208
 209         /* We now lookup certs from the certificate store */
 210         for (;;)
 211                 {
 212                 /* If we have enough, we break */
 213                 if (depth < num) break;
 214
 215                 /* If we are self signed, we break */
 216                 xn=X509_get_issuer_name(x);
 217                 if (X509_NAME_cmp(X509_get_subject_name(x),xn) == 0)
 218                         break;
 219
 220                 ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 221                 if (ok != X509_LU_X509)
 222                         {
 223                         if (ok == X509_LU_RETRY)
 224                                 {
 225                                 X509_OBJECT_free_contents(&obj);
 226                                 X509err(X509_F_X509_VERIFY_CERT,X509_R_SHOULD_RETRY);
 227                                 return(ok);
 228                                 }
 229                         else if (ok != X509_LU_FAIL)
 230                                 {
 231                                 X509_OBJECT_free_contents(&obj);
 232                                 /* not good :-(, break anyway */
 233                                 return(ok);
 234                                 }
 235                         break;
 236                         }
 237                 x=obj.data.x509;
 238                 if (!sk_X509_push(ctx->chain,obj.data.x509))
 239                         {
 240                         X509_OBJECT_free_contents(&obj);
 241                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 242                         return(0);
 243                         }
 244                 num++;
 245                 }
 246
 247         /* we now have our chain, lets check it... */
 248         xn=X509_get_issuer_name(x);
 249         if (X509_NAME_cmp(X509_get_subject_name(x),xn) != 0)
 250                 {
 251                 if ((chain_ss == NULL) || (X509_NAME_cmp(X509_get_subject_name(chain_ss),xn) != 0))
 252                         {
 253                         if (ctx->last_untrusted >= num)
 254                                 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
 255                         else
 256                                 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
 257                         ctx->current_cert=x;
 258                         }
 259                 else
 260                         {
 261
 262                         sk_X509_push(ctx->chain,chain_ss);
 263                         num++;
 264                         ctx->last_untrusted=num;
 265                         ctx->current_cert=chain_ss;
 266                         ctx->error=X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
 267                         chain_ss=NULL;
 268                         }
 269
 270                 ctx->error_depth=num-1;
 271                 ok=cb(0,ctx);
 272                 if (!ok) goto end;
 273                 }
 274
 275         /* We may as well copy down any DSA parameters that are required */
 276         X509_get_pubkey_parameters(NULL,ctx->chain);
 277
 278         /* At this point, we have a chain and just need to verify it */
 279         if (ctx->ctx->verify != NULL)
 280                 ok=ctx->ctx->verify(ctx);
 281         else
 282                 ok=internal_verify(ctx);
 283         if (0)
 284                 {
 285 end:
 286                 X509_get_pubkey_parameters(NULL,ctx->chain);
 287                 }
 288         if (sktmp != NULL) sk_X509_free(sktmp);
 289         if (chain_ss != NULL) X509_free(chain_ss);
 290         return(ok);
 291         }
 292
 293 static int internal_verify(X509_STORE_CTX *ctx)
 294         {
 295         int i,ok=0,n;
 296         X509 *xs,*xi;
 297         EVP_PKEY *pkey=NULL;
 298         int (*cb)();
 299
 300         cb=ctx->ctx->verify_cb;
 301         if (cb == NULL) cb=null_callback;
 302
 303         n=sk_X509_num(ctx->chain);
 304         ctx->error_depth=n-1;
 305         n--;
 306         xi=sk_X509_value(ctx->chain,n);
 307         if (X509_NAME_cmp(X509_get_subject_name(xi),
 308                 X509_get_issuer_name(xi)) == 0)
 309                 xs=xi;
 310         else
 311                 {
 312                 if (n <= 0)
 313                         {
 314                         ctx->error=X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
 315                         ctx->current_cert=xi;
 316                         ok=cb(0,ctx);
 317                         goto end;
 318                         }
 319                 else
 320                         {
 321                         n--;
 322                         ctx->error_depth=n;
 323                         xs=sk_X509_value(ctx->chain,n);
 324                         }
 325                 }
 326
 327 /*      ctx->error=0;  not needed */
 328         while (n >= 0)
 329                 {
 330                 ctx->error_depth=n;
 331                 if (!xs->valid)
 332                         {
 333                         if ((pkey=X509_get_pubkey(xi)) == NULL)
 334                                 {
 335                                 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
 336                                 ctx->current_cert=xi;
 337                                 ok=(*cb)(0,ctx);
 338                                 if (!ok) goto end;
 339                                 }
 340                         if (X509_verify(xs,pkey) <= 0)
 341                                 {
 342                                 EVP_PKEY_free(pkey);
 343                                 ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
 344                                 ctx->current_cert=xs;
 345                                 ok=(*cb)(0,ctx);
 346                                 if (!ok) goto end;
 347                                 }
 348                         EVP_PKEY_free(pkey);
 349                         pkey=NULL;
 350
 351                         i=X509_cmp_current_time(X509_get_notBefore(xs));
 352                         if (i == 0)
 353                                 {
 354                                 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
 355                                 ctx->current_cert=xs;
 356                                 ok=(*cb)(0,ctx);
 357                                 if (!ok) goto end;
 358                                 }
 359                         if (i > 0)
 360                                 {
 361                                 ctx->error=X509_V_ERR_CERT_NOT_YET_VALID;
 362                                 ctx->current_cert=xs;
 363                                 ok=(*cb)(0,ctx);
 364                                 if (!ok) goto end;
 365                                 }
 366                         xs->valid=1;
 367                         }
 368
 369                 i=X509_cmp_current_time(X509_get_notAfter(xs));
 370                 if (i == 0)
 371                         {
 372                         ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
 373                         ctx->current_cert=xs;
 374                         ok=(*cb)(0,ctx);
 375                         if (!ok) goto end;
 376                         }
 377
 378                 if (i < 0)
 379                         {
 380                         ctx->error=X509_V_ERR_CERT_HAS_EXPIRED;
 381                         ctx->current_cert=xs;
 382                         ok=(*cb)(0,ctx);
 383                         if (!ok) goto end;
 384                         }
 385
 386                 /* CRL CHECK */
 387
 388                 /* The last error (if any) is still in the error value */
 389                 ctx->current_cert=xs;
 390                 ok=(*cb)(1,ctx);
 391                 if (!ok) goto end;
 392
 393                 n--;
 394                 if (n >= 0)
 395                         {
 396                         xi=xs;
 397                         xs=sk_X509_value(ctx->chain,n);
 398                         }
 399                 }
 400         ok=1;
 401 end:
 402         return(ok);
 403         }
 404
 405 int X509_cmp_current_time(ASN1_UTCTIME *ctm)
 406         {
 407         char *str;
 408         ASN1_UTCTIME atm;
 409         time_t offset;
 410         char buff1[24],buff2[24],*p;
 411         int i,j;
 412
 413         p=buff1;
 414         i=ctm->length;
 415         str=(char *)ctm->data;
 416         if ((i < 11) || (i > 17)) return(0);
 417         memcpy(p,str,10);
 418         p+=10;
 419         str+=10;
 420
 421         if ((*str == 'Z') || (*str == '-') || (*str == '+'))
 422                 { *(p++)='0'; *(p++)='0'; }
 423         else    { *(p++)= *(str++); *(p++)= *(str++); }
 424         *(p++)='Z';
 425         *(p++)='\0';
 426
 427         if (*str == 'Z')
 428                 offset=0;
 429         else
 430                 {
 431                 if ((*str != '+') && (str[5] != '-'))
 432                         return(0);
 433                 offset=((str[1]-'0')*10+(str[2]-'0'))*60;
 434                 offset+=(str[3]-'0')*10+(str[4]-'0');
 435                 if (*str == '-')
 436                         offset= -offset;
 437                 }
 438         atm.type=V_ASN1_UTCTIME;
 439         atm.length=sizeof(buff2);
 440         atm.data=(unsigned char *)buff2;
 441
 442         X509_gmtime_adj(&atm,-offset);
 443
 444         i=(buff1[0]-'0')*10+(buff1[1]-'0');
 445         if (i < 50) i+=100; /* cf. RFC 2459 */
 446         j=(buff2[0]-'0')*10+(buff2[1]-'0');
 447         if (j < 50) j+=100;
 448
 449         if (i < j) return (-1);
 450         if (i > j) return (1);
 451         i=strcmp(buff1,buff2);
 452         if (i == 0) /* wait a second then return younger :-) */
 453                 return(-1);
 454         else
 455                 return(i);
 456         }
 457
 458 ASN1_UTCTIME *X509_gmtime_adj(ASN1_UTCTIME *s, long adj)
 459         {
 460         time_t t;
 461
 462         time(&t);
 463         t+=adj;
 464         return(ASN1_UTCTIME_set(s,t));
 465         }
 466
 467 int X509_get_pubkey_parameters(EVP_PKEY *pkey, STACK_OF(X509) *chain)
 468         {
 469         EVP_PKEY *ktmp=NULL,*ktmp2;
 470         int i,j;
 471
 472         if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) return(1);
 473
 474         for (i=0; i<sk_X509_num(chain); i++)
 475                 {
 476                 ktmp=X509_get_pubkey(sk_X509_value(chain,i));
 477                 if (ktmp == NULL)
 478                         {
 479                         X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY);
 480                         return(0);
 481                         }
 482                 if (!EVP_PKEY_missing_parameters(ktmp))
 483                         break;
 484                 else
 485                         {
 486                         EVP_PKEY_free(ktmp);
 487                         ktmp=NULL;
 488                         }
 489                 }
 490         if (ktmp == NULL)
 491                 {
 492                 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN);
 493                 return(0);
 494                 }
 495
 496         /* first, populate the other certs */
 497         for (j=i-1; j >= 0; j--)
 498                 {
 499                 ktmp2=X509_get_pubkey(sk_X509_value(chain,j));
 500                 EVP_PKEY_copy_parameters(ktmp2,ktmp);
 501                 EVP_PKEY_free(ktmp2);
 502                 }
 503
 504         if (pkey != NULL) EVP_PKEY_copy_parameters(pkey,ktmp);
 505         EVP_PKEY_free(ktmp);
 506         return(1);
 507         }
 508
 509 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
 510         {
 511         X509_OBJECT *obj,*r;
 512         int ret=1;
 513
 514         if (x == NULL) return(0);
 515         obj=(X509_OBJECT *)Malloc(sizeof(X509_OBJECT));
 516         if (obj == NULL)
 517                 {
 518                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 519                 return(0);
 520                 }
 521         obj->type=X509_LU_X509;
 522         obj->data.x509=x;
 523
 524         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 525
 526         X509_OBJECT_up_ref_count(obj);
 527
 528         r=(X509_OBJECT *)lh_insert(ctx->certs,(char *)obj);
 529         if (r != NULL)
 530                 { /* oops, put it back */
 531                 lh_delete(ctx->certs,(char *)obj);
 532                 X509_OBJECT_free_contents(obj);
 533                 Free(obj);
 534                 lh_insert(ctx->certs,(char *)r);
 535                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 536                 ret=0;
 537                 }
 538
 539         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 540
 541         return(ret);
 542         }
 543
 544 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
 545         {
 546         X509_OBJECT *obj,*r;
 547         int ret=1;
 548
 549         if (x == NULL) return(0);
 550         obj=(X509_OBJECT *)Malloc(sizeof(X509_OBJECT));
 551         if (obj == NULL)
 552                 {
 553                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 554                 return(0);
 555                 }
 556         obj->type=X509_LU_CRL;
 557         obj->data.crl=x;
 558
 559         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 560
 561         X509_OBJECT_up_ref_count(obj);
 562
 563         r=(X509_OBJECT *)lh_insert(ctx->certs,(char *)obj);
 564         if (r != NULL)
 565                 { /* oops, put it back */
 566                 lh_delete(ctx->certs,(char *)obj);
 567                 X509_OBJECT_free_contents(obj);
 568                 Free(obj);
 569                 lh_insert(ctx->certs,(char *)r);
 570                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 571                 ret=0;
 572                 }
 573
 574         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 575
 576         return(ret);
 577         }
 578
 579 int X509_STORE_CTX_get_ex_new_index(long argl, char *argp, int (*new_func)(),
 580              int (*dup_func)(), void (*free_func)())
 581         {
 582         x509_store_ctx_num++;
 583         return(CRYPTO_get_ex_new_index(x509_store_ctx_num-1,
 584                 &x509_store_ctx_method,
 585                 argl,argp,new_func,dup_func,free_func));
 586         }
 587
 588 int X509_STORE_CTX_set_ex_data(X509_STORE_CTX *ctx, int idx, void *data)
 589         {
 590         return(CRYPTO_set_ex_data(&ctx->ex_data,idx,data));
 591         }
 592
 593 void *X509_STORE_CTX_get_ex_data(X509_STORE_CTX *ctx, int idx)
 594         {
 595         return(CRYPTO_get_ex_data(&ctx->ex_data,idx));
 596         }
 597
 598 int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx)
 599         {
 600         return(ctx->error);
 601         }
 602
 603 void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx, int err)
 604         {
 605         ctx->error=err;
 606         }
 607
 608 int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx)
 609         {
 610         return(ctx->error_depth);
 611         }
 612
 613 X509 *X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx)
 614         {
 615         return(ctx->current_cert);
 616         }
 617
 618 STACK_OF(X509) *X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx)
 619         {
 620         return(ctx->chain);
 621         }
 622
 623 void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x)
 624         {
 625         ctx->cert=x;
 626         }
 627
 628 void X509_STORE_CTX_set_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *sk)
 629         {
 630         ctx->untrusted=sk;
 631         }
 632
 633 IMPLEMENT_STACK_OF(X509)
 634 IMPLEMENT_ASN1_SET_OF(X509)
 635
 636 IMPLEMENT_STACK_OF(X509_NAME)
 637
 638 IMPLEMENT_STACK_OF(X509_ATTRIBUTE)
 639 IMPLEMENT_ASN1_SET_OF(X509_ATTRIBUTE)