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 "crypto.h"
  66 #include "cryptlib.h"
  67 #include "lhash.h"
  68 #include "buffer.h"
  69 #include "evp.h"
  70 #include "asn1.h"
  71 #include "x509.h"
  72 #include "objects.h"
  73
  74 #ifndef NOPROTO
  75 static int null_callback(int ok,X509_STORE_CTX *e);
  76 static int internal_verify(X509_STORE_CTX *ctx);
  77 #else
  78 static int null_callback();
  79 static int internal_verify();
  80 #endif
  81
  82 char *X509_version="X.509" OPENSSL_VERSION_PTEXT;
  83
  84 static STACK *x509_store_ctx_method=NULL;
  85 static int x509_store_ctx_num=0;
  86 #if 0
  87 static int x509_store_num=1;
  88 static STACK *x509_store_method=NULL;
  89 #endif
  90
  91 static int null_callback(ok,e)
  92 int ok;
  93 X509_STORE_CTX *e;
  94         {
  95         return(ok);
  96         }
  97
  98 #if 0
  99 static int x509_subject_cmp(a,b)
 100 X509 **a,**b;
 101         {
 102         return(X509_subject_name_cmp(*a,*b));
 103         }
 104 #endif
 105
 106 int X509_verify_cert(ctx)
 107 X509_STORE_CTX *ctx;
 108         {
 109         X509 *x,*xtmp,*chain_ss=NULL;
 110         X509_NAME *xn;
 111         X509_OBJECT obj;
 112         int depth,i,ok=0;
 113         int num;
 114         int (*cb)();
 115         STACK *sktmp=NULL;
 116
 117         if (ctx->cert == NULL)
 118                 {
 119                 X509err(X509_F_X509_VERIFY_CERT,X509_R_NO_CERT_SET_FOR_US_TO_VERIFY);
 120                 return(-1);
 121                 }
 122
 123         cb=ctx->ctx->verify_cb;
 124         if (cb == NULL) cb=null_callback;
 125
 126         /* first we make sure the chain we are going to build is
 127          * present and that the first entry is in place */
 128         if (ctx->chain == NULL)
 129                 {
 130                 if (    ((ctx->chain=sk_new_null()) == NULL) ||
 131                         (!sk_push(ctx->chain,(char *)ctx->cert)))
 132                         {
 133                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 134                         goto end;
 135                         }
 136                 CRYPTO_add(&ctx->cert->references,1,CRYPTO_LOCK_X509);
 137                 ctx->last_untrusted=1;
 138                 }
 139
 140         /* We use a temporary so we can chop and hack at it */
 141         if ((ctx->untrusted != NULL) && (sktmp=sk_dup(ctx->untrusted)) == NULL)
 142                 {
 143                 X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 144                 goto end;
 145                 }
 146
 147         num=sk_num(ctx->chain);
 148         x=(X509 *)sk_value(ctx->chain,num-1);
 149         depth=ctx->depth;
 150
 151
 152         for (;;)
 153                 {
 154                 /* If we have enough, we break */
 155                 if (depth <= num) break;
 156
 157                 /* If we are self signed, we break */
 158                 xn=X509_get_issuer_name(x);
 159                 if (X509_NAME_cmp(X509_get_subject_name(x),xn) == 0)
 160                         break;
 161
 162                 /* If we were passed a cert chain, use it first */
 163                 if (ctx->untrusted != NULL)
 164                         {
 165                         xtmp=X509_find_by_subject(sktmp,xn);
 166                         if (xtmp != NULL)
 167                                 {
 168                                 if (!sk_push(ctx->chain,(char *)xtmp))
 169                                         {
 170                                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 171                                         goto end;
 172                                         }
 173                                 CRYPTO_add(&xtmp->references,1,CRYPTO_LOCK_X509);
 174                                 sk_delete_ptr(sktmp,(char *)xtmp);
 175                                 ctx->last_untrusted++;
 176                                 x=xtmp;
 177                                 num++;
 178                                 /* reparse the full chain for
 179                                  * the next one */
 180                                 continue;
 181                                 }
 182                         }
 183                 break;
 184                 }
 185
 186         /* at this point, chain should contain a list of untrusted
 187          * certificates.  We now need to add at least one trusted one,
 188          * if possible, otherwise we complain. */
 189
 190         i=sk_num(ctx->chain);
 191         x=(X509 *)sk_value(ctx->chain,i-1);
 192         if (X509_NAME_cmp(X509_get_subject_name(x),X509_get_issuer_name(x))
 193                 == 0)
 194                 {
 195                 /* we have a self signed certificate */
 196                 if (sk_num(ctx->chain) == 1)
 197                         {
 198                         ctx->error=X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
 199                         ctx->current_cert=x;
 200                         ctx->error_depth=i-1;
 201                         ok=cb(0,ctx);
 202                         if (!ok) goto end;
 203                         }
 204                 else
 205                         {
 206                         /* worry more about this one elsewhere */
 207                         chain_ss=(X509 *)sk_pop(ctx->chain);
 208                         ctx->last_untrusted--;
 209                         num--;
 210                         x=(X509 *)sk_value(ctx->chain,num-1);
 211                         }
 212                 }
 213
 214         /* We now lookup certs from the certificate store */
 215         for (;;)
 216                 {
 217                 /* If we have enough, we break */
 218                 if (depth <= num) break;
 219
 220                 /* If we are self signed, we break */
 221                 xn=X509_get_issuer_name(x);
 222                 if (X509_NAME_cmp(X509_get_subject_name(x),xn) == 0)
 223                         break;
 224
 225                 ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
 226                 if (ok != X509_LU_X509)
 227                         {
 228                         if (ok == X509_LU_RETRY)
 229                                 {
 230                                 X509_OBJECT_free_contents(&obj);
 231                                 X509err(X509_F_X509_VERIFY_CERT,X509_R_SHOULD_RETRY);
 232                                 return(ok);
 233                                 }
 234                         else if (ok != X509_LU_FAIL)
 235                                 {
 236                                 X509_OBJECT_free_contents(&obj);
 237                                 /* not good :-(, break anyway */
 238                                 return(ok);
 239                                 }
 240                         break;
 241                         }
 242                 x=obj.data.x509;
 243                 if (!sk_push(ctx->chain,(char *)obj.data.x509))
 244                         {
 245                         X509_OBJECT_free_contents(&obj);
 246                         X509err(X509_F_X509_VERIFY_CERT,ERR_R_MALLOC_FAILURE);
 247                         return(0);
 248                         }
 249                 num++;
 250                 }
 251
 252         /* we now have our chain, lets check it... */
 253         xn=X509_get_issuer_name(x);
 254         if (X509_NAME_cmp(X509_get_subject_name(x),xn) != 0)
 255                 {
 256                 if ((chain_ss == NULL) || (X509_NAME_cmp(X509_get_subject_name(chain_ss),xn) != 0))
 257                         {
 258                         if (ctx->last_untrusted >= num)
 259                                 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY;
 260                         else
 261                                 ctx->error=X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT;
 262                         ctx->current_cert=x;
 263                         }
 264                 else
 265                         {
 266
 267                         sk_push(ctx->chain,(char *)chain_ss);
 268                         num++;
 269                         ctx->last_untrusted=num;
 270                         ctx->current_cert=chain_ss;
 271                         ctx->error=X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN;
 272                         chain_ss=NULL;
 273                         }
 274
 275                 ctx->error_depth=num-1;
 276                 ok=cb(0,ctx);
 277                 if (!ok) goto end;
 278                 }
 279
 280         /* We may as well copy down any DSA parameters that are required */
 281         X509_get_pubkey_parameters(NULL,ctx->chain);
 282
 283         /* At this point, we have a chain and just need to verify it */
 284         if (ctx->ctx->verify != NULL)
 285                 ok=ctx->ctx->verify(ctx);
 286         else
 287                 ok=internal_verify(ctx);
 288         if (0)
 289                 {
 290 end:
 291                 X509_get_pubkey_parameters(NULL,ctx->chain);
 292                 }
 293         if (sktmp != NULL) sk_free(sktmp);
 294         if (chain_ss != NULL) X509_free(chain_ss);
 295         return(ok);
 296         }
 297
 298 static int internal_verify(ctx)
 299 X509_STORE_CTX *ctx;
 300         {
 301         int i,ok=0,n;
 302         X509 *xs,*xi;
 303         EVP_PKEY *pkey=NULL;
 304         int (*cb)();
 305
 306         cb=ctx->ctx->verify_cb;
 307         if (cb == NULL) cb=null_callback;
 308
 309         n=sk_num(ctx->chain);
 310         ctx->error_depth=n-1;
 311         n--;
 312         xi=(X509 *)sk_value(ctx->chain,n);
 313         if (X509_NAME_cmp(X509_get_subject_name(xi),
 314                 X509_get_issuer_name(xi)) == 0)
 315                 xs=xi;
 316         else
 317                 {
 318                 if (n <= 0)
 319                         {
 320                         ctx->error=X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE;
 321                         ctx->current_cert=xi;
 322                         ok=cb(0,ctx);
 323                         goto end;
 324                         }
 325                 else
 326                         {
 327                         n--;
 328                         ctx->error_depth=n;
 329                         xs=(X509 *)sk_value(ctx->chain,n);
 330                         }
 331                 }
 332
 333 /*      ctx->error=0;  not needed */
 334         while (n >= 0)
 335                 {
 336                 ctx->error_depth=n;
 337                 if (!xs->valid)
 338                         {
 339                         if ((pkey=X509_get_pubkey(xi)) == NULL)
 340                                 {
 341                                 ctx->error=X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY;
 342                                 ctx->current_cert=xi;
 343                                 ok=(*cb)(0,ctx);
 344                                 if (!ok) goto end;
 345                                 }
 346                         if (X509_verify(xs,pkey) <= 0)
 347                                 {
 348                                 EVP_PKEY_free(pkey);
 349                                 ctx->error=X509_V_ERR_CERT_SIGNATURE_FAILURE;
 350                                 ctx->current_cert=xs;
 351                                 ok=(*cb)(0,ctx);
 352                                 if (!ok) goto end;
 353                                 }
 354                         EVP_PKEY_free(pkey);
 355                         pkey=NULL;
 356
 357                         i=X509_cmp_current_time(X509_get_notBefore(xs));
 358                         if (i == 0)
 359                                 {
 360                                 ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
 361                                 ctx->current_cert=xs;
 362                                 ok=(*cb)(0,ctx);
 363                                 if (!ok) goto end;
 364                                 }
 365                         if (i > 0)
 366                                 {
 367                                 ctx->error=X509_V_ERR_CERT_NOT_YET_VALID;
 368                                 ctx->current_cert=xs;
 369                                 ok=(*cb)(0,ctx);
 370                                 if (!ok) goto end;
 371                                 }
 372                         xs->valid=1;
 373                         }
 374
 375                 i=X509_cmp_current_time(X509_get_notAfter(xs));
 376                 if (i == 0)
 377                         {
 378                         ctx->error=X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
 379                         ctx->current_cert=xs;
 380                         ok=(*cb)(0,ctx);
 381                         if (!ok) goto end;
 382                         }
 383
 384                 if (i < 0)
 385                         {
 386                         ctx->error=X509_V_ERR_CERT_HAS_EXPIRED;
 387                         ctx->current_cert=xs;
 388                         ok=(*cb)(0,ctx);
 389                         if (!ok) goto end;
 390                         }
 391
 392                 /* CRL CHECK */
 393
 394                 /* The last error (if any) is still in the error value */
 395                 ctx->current_cert=xs;
 396                 ok=(*cb)(1,ctx);
 397                 if (!ok) goto end;
 398
 399                 n--;
 400                 if (n >= 0)
 401                         {
 402                         xi=xs;
 403                         xs=(X509 *)sk_value(ctx->chain,n);
 404                         }
 405                 }
 406         ok=1;
 407 end:
 408         return(ok);
 409         }
 410
 411 int X509_cmp_current_time(ctm)
 412 ASN1_UTCTIME *ctm;
 413         {
 414         char *str;
 415         ASN1_UTCTIME atm;
 416         time_t offset;
 417         char buff1[24],buff2[24],*p;
 418         int i,j;
 419
 420         p=buff1;
 421         i=ctm->length;
 422         str=(char *)ctm->data;
 423         if ((i < 11) || (i > 17)) return(0);
 424         memcpy(p,str,10);
 425         p+=10;
 426         str+=10;
 427
 428         if ((*str == 'Z') || (*str == '-') || (*str == '+'))
 429                 { *(p++)='0'; *(p++)='0'; }
 430         else    { *(p++)= *(str++); *(p++)= *(str++); }
 431         *(p++)='Z';
 432         *(p++)='\0';
 433
 434         if (*str == 'Z')
 435                 offset=0;
 436         else
 437                 {
 438                 if ((*str != '+') && (str[5] != '-'))
 439                         return(0);
 440                 offset=((str[1]-'0')*10+(str[2]-'0'))*60;
 441                 offset+=(str[3]-'0')*10+(str[4]-'0');
 442                 if (*str == '-')
 443                         offset= -offset;
 444                 }
 445         atm.type=V_ASN1_UTCTIME;
 446         atm.length=sizeof(buff2);
 447         atm.data=(unsigned char *)buff2;
 448
 449         X509_gmtime_adj(&atm,-offset);
 450
 451         i=(buff1[0]-'0')*10+(buff1[1]-'0');
 452         if (i < 70) i+=100;
 453         j=(buff2[0]-'0')*10+(buff2[1]-'0');
 454         if (j < 70) j+=100;
 455
 456         if (i < j) return (-1);
 457         if (i > j) return (1);
 458         i=strcmp(buff1,buff2);
 459         if (i == 0) /* wait a second then return younger :-) */
 460                 return(-1);
 461         else
 462                 return(i);
 463         }
 464
 465 ASN1_UTCTIME *X509_gmtime_adj(s, adj)
 466 ASN1_UTCTIME *s;
 467 long adj;
 468         {
 469         time_t t;
 470
 471         time(&t);
 472         t+=adj;
 473         return(ASN1_UTCTIME_set(s,t));
 474         }
 475
 476 int X509_get_pubkey_parameters(pkey,chain)
 477 EVP_PKEY *pkey;
 478 STACK *chain;
 479         {
 480         EVP_PKEY *ktmp=NULL,*ktmp2;
 481         int i,j;
 482
 483         if ((pkey != NULL) && !EVP_PKEY_missing_parameters(pkey)) return(1);
 484
 485         for (i=0; i<sk_num(chain); i++)
 486                 {
 487                 ktmp=X509_get_pubkey((X509 *)sk_value(chain,i));
 488                 if (ktmp == NULL)
 489                         {
 490                         X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_GET_CERTS_PUBLIC_KEY);
 491                         return(0);
 492                         }
 493                 if (!EVP_PKEY_missing_parameters(ktmp))
 494                         break;
 495                 else
 496                         {
 497                         EVP_PKEY_free(ktmp);
 498                         ktmp=NULL;
 499                         }
 500                 }
 501         if (ktmp == NULL)
 502                 {
 503                 X509err(X509_F_X509_GET_PUBKEY_PARAMETERS,X509_R_UNABLE_TO_FIND_PARAMETERS_IN_CHAIN);
 504                 return(0);
 505                 }
 506
 507         /* first, populate the other certs */
 508         for (j=i-1; j >= 0; j--)
 509                 {
 510                 ktmp2=X509_get_pubkey((X509 *)sk_value(chain,j));
 511                 EVP_PKEY_copy_parameters(ktmp2,ktmp);
 512                 EVP_PKEY_free(ktmp2);
 513                 }
 514
 515         if (pkey != NULL) EVP_PKEY_copy_parameters(pkey,ktmp);
 516         EVP_PKEY_free(ktmp);
 517         return(1);
 518         }
 519
 520 int X509_STORE_add_cert(ctx,x)
 521 X509_STORE *ctx;
 522 X509 *x;
 523         {
 524         X509_OBJECT *obj,*r;
 525         int ret=1;
 526
 527         if (x == NULL) return(0);
 528         obj=(X509_OBJECT *)Malloc(sizeof(X509_OBJECT));
 529         if (obj == NULL)
 530                 {
 531                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
 532                 return(0);
 533                 }
 534         obj->type=X509_LU_X509;
 535         obj->data.x509=x;
 536
 537         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 538
 539         X509_OBJECT_up_ref_count(obj);
 540
 541         r=(X509_OBJECT *)lh_insert(ctx->certs,(char *)obj);
 542         if (r != NULL)
 543                 { /* oops, put it back */
 544                 lh_delete(ctx->certs,(char *)obj);
 545                 X509_OBJECT_free_contents(obj);
 546                 Free(obj);
 547                 lh_insert(ctx->certs,(char *)r);
 548                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 549                 ret=0;
 550                 }
 551
 552         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 553
 554         return(ret);
 555         }
 556
 557 int X509_STORE_add_crl(ctx,x)
 558 X509_STORE *ctx;
 559 X509_CRL *x;
 560         {
 561         X509_OBJECT *obj,*r;
 562         int ret=1;
 563
 564         if (x == NULL) return(0);
 565         obj=(X509_OBJECT *)Malloc(sizeof(X509_OBJECT));
 566         if (obj == NULL)
 567                 {
 568                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
 569                 return(0);
 570                 }
 571         obj->type=X509_LU_CRL;
 572         obj->data.crl=x;
 573
 574         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 575
 576         X509_OBJECT_up_ref_count(obj);
 577
 578         r=(X509_OBJECT *)lh_insert(ctx->certs,(char *)obj);
 579         if (r != NULL)
 580                 { /* oops, put it back */
 581                 lh_delete(ctx->certs,(char *)obj);
 582                 X509_OBJECT_free_contents(obj);
 583                 Free(obj);
 584                 lh_insert(ctx->certs,(char *)r);
 585                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
 586                 ret=0;
 587                 }
 588
 589         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 590
 591         return(ret);
 592         }
 593
 594 int X509_STORE_CTX_get_ex_new_index(argl,argp,new_func,dup_func,free_func)
 595 long argl;
 596 char *argp;
 597 int (*new_func)();
 598 int (*dup_func)();
 599 void (*free_func)();
 600         {
 601         x509_store_ctx_num++;
 602         return(CRYPTO_get_ex_new_index(x509_store_ctx_num-1,
 603                 &x509_store_ctx_method,
 604                 argl,argp,new_func,dup_func,free_func));
 605         }
 606
 607 int X509_STORE_CTX_set_ex_data(ctx,idx,data)
 608 X509_STORE_CTX *ctx;
 609 int idx;
 610 char *data;
 611         {
 612         return(CRYPTO_set_ex_data(&ctx->ex_data,idx,data));
 613         }
 614
 615 char *X509_STORE_CTX_get_ex_data(ctx,idx)
 616 X509_STORE_CTX *ctx;
 617 int idx;
 618         {
 619         return(CRYPTO_get_ex_data(&ctx->ex_data,idx));
 620         }
 621
 622 int X509_STORE_CTX_get_error(ctx)
 623 X509_STORE_CTX *ctx;
 624         {
 625         return(ctx->error);
 626         }
 627
 628 void X509_STORE_CTX_set_error(ctx,err)
 629 X509_STORE_CTX *ctx;
 630 int err;
 631         {
 632         ctx->error=err;
 633         }
 634
 635 int X509_STORE_CTX_get_error_depth(ctx)
 636 X509_STORE_CTX *ctx;
 637         {
 638         return(ctx->error_depth);
 639         }
 640
 641 X509 *X509_STORE_CTX_get_current_cert(ctx)
 642 X509_STORE_CTX *ctx;
 643         {
 644         return(ctx->current_cert);
 645         }
 646
 647 STACK *X509_STORE_CTX_get_chain(ctx)
 648 X509_STORE_CTX *ctx;
 649         {
 650         return(ctx->chain);
 651         }
 652
 653 void X509_STORE_CTX_set_cert(ctx,x)
 654 X509_STORE_CTX *ctx;
 655 X509 *x;
 656         {
 657         ctx->cert=x;
 658         }
 659
 660 void X509_STORE_CTX_set_chain(ctx,sk)
 661 X509_STORE_CTX *ctx;
 662 STACK *sk;
 663         {
 664         ctx->untrusted=sk;
 665         }
 666
 667