crypto/openssl/crypto/pkcs7/pk7_doit.c

   1 /* crypto/pkcs7/pk7_doit.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/rand.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/x509.h>
  64 #include <openssl/x509v3.h>
  65 #include <openssl/err.h>
  66
  67 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
  68                          void *value);
  69 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
  70
  71 static int PKCS7_type_is_other(PKCS7* p7)
  72         {
  73         int isOther=1;
  74
  75         int nid=OBJ_obj2nid(p7->type);
  76
  77         switch( nid )
  78                 {
  79         case NID_pkcs7_data:
  80         case NID_pkcs7_signed:
  81         case NID_pkcs7_enveloped:
  82         case NID_pkcs7_signedAndEnveloped:
  83         case NID_pkcs7_digest:
  84         case NID_pkcs7_encrypted:
  85                 isOther=0;
  86                 break;
  87         default:
  88                 isOther=1;
  89                 }
  90
  91         return isOther;
  92
  93         }
  94
  95 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
  96         {
  97         if ( PKCS7_type_is_data(p7))
  98                 return p7->d.data;
  99         if ( PKCS7_type_is_other(p7) && p7->d.other
 100                 && (p7->d.other->type == V_ASN1_OCTET_STRING))
 101                 return p7->d.other->value.octet_string;
 102         return NULL;
 103         }
 104
 105 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
 106         {
 107         BIO *btmp;
 108         const EVP_MD *md;
 109         if ((btmp=BIO_new(BIO_f_md())) == NULL)
 110                 {
 111                 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
 112                 goto err;
 113                 }
 114
 115         md=EVP_get_digestbyobj(alg->algorithm);
 116         if (md == NULL)
 117                 {
 118                 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE);
 119                 goto err;
 120                 }
 121
 122         BIO_set_md(btmp,md);
 123         if (*pbio == NULL)
 124                 *pbio=btmp;
 125         else if (!BIO_push(*pbio,btmp))
 126                 {
 127                 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,ERR_R_BIO_LIB);
 128                 goto err;
 129                 }
 130         btmp=NULL;
 131
 132         return 1;
 133
 134         err:
 135         if (btmp)
 136                 BIO_free(btmp);
 137         return 0;
 138
 139         }
 140
 141 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
 142         {
 143         int i;
 144         BIO *out=NULL,*btmp=NULL;
 145         X509_ALGOR *xa = NULL;
 146         const EVP_CIPHER *evp_cipher=NULL;
 147         STACK_OF(X509_ALGOR) *md_sk=NULL;
 148         STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
 149         X509_ALGOR *xalg=NULL;
 150         PKCS7_RECIP_INFO *ri=NULL;
 151         EVP_PKEY *pkey;
 152         ASN1_OCTET_STRING *os=NULL;
 153
 154         i=OBJ_obj2nid(p7->type);
 155         p7->state=PKCS7_S_HEADER;
 156
 157         switch (i)
 158                 {
 159         case NID_pkcs7_signed:
 160                 md_sk=p7->d.sign->md_algs;
 161                 os = PKCS7_get_octet_string(p7->d.sign->contents);
 162                 break;
 163         case NID_pkcs7_signedAndEnveloped:
 164                 rsk=p7->d.signed_and_enveloped->recipientinfo;
 165                 md_sk=p7->d.signed_and_enveloped->md_algs;
 166                 xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
 167                 evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
 168                 if (evp_cipher == NULL)
 169                         {
 170                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,
 171                                                 PKCS7_R_CIPHER_NOT_INITIALIZED);
 172                         goto err;
 173                         }
 174                 break;
 175         case NID_pkcs7_enveloped:
 176                 rsk=p7->d.enveloped->recipientinfo;
 177                 xalg=p7->d.enveloped->enc_data->algorithm;
 178                 evp_cipher=p7->d.enveloped->enc_data->cipher;
 179                 if (evp_cipher == NULL)
 180                         {
 181                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,
 182                                                 PKCS7_R_CIPHER_NOT_INITIALIZED);
 183                         goto err;
 184                         }
 185                 break;
 186         case NID_pkcs7_digest:
 187                 xa = p7->d.digest->md;
 188                 os = PKCS7_get_octet_string(p7->d.digest->contents);
 189                 break;
 190         default:
 191                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 192                 goto err;
 193                 }
 194
 195         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 196                 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
 197                         goto err;
 198
 199         if (xa && !PKCS7_bio_add_digest(&out, xa))
 200                         goto err;
 201
 202         if (evp_cipher != NULL)
 203                 {
 204                 unsigned char key[EVP_MAX_KEY_LENGTH];
 205                 unsigned char iv[EVP_MAX_IV_LENGTH];
 206                 int keylen,ivlen;
 207                 int jj,max;
 208                 unsigned char *tmp;
 209                 EVP_CIPHER_CTX *ctx;
 210
 211                 if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
 212                         {
 213                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
 214                         goto err;
 215                         }
 216                 BIO_get_cipher_ctx(btmp, &ctx);
 217                 keylen=EVP_CIPHER_key_length(evp_cipher);
 218                 ivlen=EVP_CIPHER_iv_length(evp_cipher);
 219                 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
 220                 if (ivlen > 0)
 221                         if (RAND_pseudo_bytes(iv,ivlen) <= 0)
 222                                 goto err;
 223                 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
 224                         goto err;
 225                 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
 226                         goto err;
 227                 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
 228                         goto err;
 229
 230                 if (ivlen > 0) {
 231                         if (xalg->parameter == NULL) {
 232                                 xalg->parameter = ASN1_TYPE_new();
 233                                 if (xalg->parameter == NULL)
 234                                         goto err;
 235                         }
 236                         if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
 237                                goto err;
 238                 }
 239
 240                 /* Lets do the pub key stuff :-) */
 241                 max=0;
 242                 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
 243                         {
 244                         ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 245                         if (ri->cert == NULL)
 246                                 {
 247                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_MISSING_CERIPEND_INFO);
 248                                 goto err;
 249                                 }
 250                         if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
 251                                 goto err;
 252                         jj=EVP_PKEY_size(pkey);
 253                         EVP_PKEY_free(pkey);
 254                         if (max < jj) max=jj;
 255                         }
 256                 if ((tmp=(unsigned char *)OPENSSL_malloc(max)) == NULL)
 257                         {
 258                         PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_MALLOC_FAILURE);
 259                         goto err;
 260                         }
 261                 for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
 262                         {
 263                         ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 264                         if ((pkey=X509_get_pubkey(ri->cert)) == NULL)
 265                                 goto err;
 266                         jj=EVP_PKEY_encrypt(tmp,key,keylen,pkey);
 267                         EVP_PKEY_free(pkey);
 268                         if (jj <= 0)
 269                                 {
 270                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_EVP_LIB);
 271                                 OPENSSL_free(tmp);
 272                                 goto err;
 273                                 }
 274                         if (!M_ASN1_OCTET_STRING_set(ri->enc_key,tmp,jj))
 275                                 {
 276                                 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
 277                                         ERR_R_MALLOC_FAILURE);
 278                                 OPENSSL_free(tmp);
 279                                 goto err;
 280                                 }
 281                         }
 282                 OPENSSL_free(tmp);
 283                 OPENSSL_cleanse(key, keylen);
 284
 285                 if (out == NULL)
 286                         out=btmp;
 287                 else
 288                         BIO_push(out,btmp);
 289                 btmp=NULL;
 290                 }
 291
 292         if (bio == NULL)
 293                 {
 294                 if (PKCS7_is_detached(p7))
 295                         bio=BIO_new(BIO_s_null());
 296                 else if (os && os->length > 0)
 297                         bio = BIO_new_mem_buf(os->data, os->length);
 298                 if(bio == NULL)
 299                         {
 300                         bio=BIO_new(BIO_s_mem());
 301                         if (bio == NULL)
 302                                 goto err;
 303                         BIO_set_mem_eof_return(bio,0);
 304                         }
 305                 }
 306         BIO_push(out,bio);
 307         bio=NULL;
 308         if (0)
 309                 {
 310 err:
 311                 if (out != NULL)
 312                         BIO_free_all(out);
 313                 if (btmp != NULL)
 314                         BIO_free_all(btmp);
 315                 out=NULL;
 316                 }
 317         return(out);
 318         }
 319
 320 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
 321         {
 322         int ret;
 323         ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
 324                                 pcert->cert_info->issuer);
 325         if (ret)
 326                 return ret;
 327         return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
 328                                         ri->issuer_and_serial->serial);
 329         }
 330
 331 /* int */
 332 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
 333         {
 334         int i,j;
 335         BIO *out=NULL,*btmp=NULL,*etmp=NULL,*bio=NULL;
 336         unsigned char *tmp=NULL;
 337         X509_ALGOR *xa;
 338         ASN1_OCTET_STRING *data_body=NULL;
 339         const EVP_MD *evp_md;
 340         const EVP_CIPHER *evp_cipher=NULL;
 341         EVP_CIPHER_CTX *evp_ctx=NULL;
 342         X509_ALGOR *enc_alg=NULL;
 343         STACK_OF(X509_ALGOR) *md_sk=NULL;
 344         STACK_OF(PKCS7_RECIP_INFO) *rsk=NULL;
 345         PKCS7_RECIP_INFO *ri=NULL;
 346
 347         i=OBJ_obj2nid(p7->type);
 348         p7->state=PKCS7_S_HEADER;
 349
 350         switch (i)
 351                 {
 352         case NID_pkcs7_signed:
 353                 data_body=PKCS7_get_octet_string(p7->d.sign->contents);
 354                 md_sk=p7->d.sign->md_algs;
 355                 break;
 356         case NID_pkcs7_signedAndEnveloped:
 357                 rsk=p7->d.signed_and_enveloped->recipientinfo;
 358                 md_sk=p7->d.signed_and_enveloped->md_algs;
 359                 data_body=p7->d.signed_and_enveloped->enc_data->enc_data;
 360                 enc_alg=p7->d.signed_and_enveloped->enc_data->algorithm;
 361                 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
 362                 if (evp_cipher == NULL)
 363                         {
 364                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
 365                         goto err;
 366                         }
 367                 break;
 368         case NID_pkcs7_enveloped:
 369                 rsk=p7->d.enveloped->recipientinfo;
 370                 enc_alg=p7->d.enveloped->enc_data->algorithm;
 371                 data_body=p7->d.enveloped->enc_data->enc_data;
 372                 evp_cipher=EVP_get_cipherbyobj(enc_alg->algorithm);
 373                 if (evp_cipher == NULL)
 374                         {
 375                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
 376                         goto err;
 377                         }
 378                 break;
 379         default:
 380                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 381                 goto err;
 382                 }
 383
 384         /* We will be checking the signature */
 385         if (md_sk != NULL)
 386                 {
 387                 for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 388                         {
 389                         xa=sk_X509_ALGOR_value(md_sk,i);
 390                         if ((btmp=BIO_new(BIO_f_md())) == NULL)
 391                                 {
 392                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
 393                                 goto err;
 394                                 }
 395
 396                         j=OBJ_obj2nid(xa->algorithm);
 397                         evp_md=EVP_get_digestbynid(j);
 398                         if (evp_md == NULL)
 399                                 {
 400                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,PKCS7_R_UNKNOWN_DIGEST_TYPE);
 401                                 goto err;
 402                                 }
 403
 404                         BIO_set_md(btmp,evp_md);
 405                         if (out == NULL)
 406                                 out=btmp;
 407                         else
 408                                 BIO_push(out,btmp);
 409                         btmp=NULL;
 410                         }
 411                 }
 412
 413         if (evp_cipher != NULL)
 414                 {
 415 #if 0
 416                 unsigned char key[EVP_MAX_KEY_LENGTH];
 417                 unsigned char iv[EVP_MAX_IV_LENGTH];
 418                 unsigned char *p;
 419                 int keylen,ivlen;
 420                 int max;
 421                 X509_OBJECT ret;
 422 #endif
 423                 int jj;
 424
 425                 if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
 426                         {
 427                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_BIO_LIB);
 428                         goto err;
 429                         }
 430
 431                 /* It was encrypted, we need to decrypt the secret key
 432                  * with the private key */
 433
 434                 /* Find the recipientInfo which matches the passed certificate
 435                  * (if any)
 436                  */
 437
 438                 if (pcert) {
 439                         for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++) {
 440                                 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 441                                 if (!pkcs7_cmp_ri(ri, pcert))
 442                                         break;
 443                                 ri=NULL;
 444                         }
 445                         if (ri == NULL) {
 446                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
 447                                       PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
 448                                 goto err;
 449                         }
 450                 }
 451
 452                 jj=EVP_PKEY_size(pkey);
 453                 tmp=(unsigned char *)OPENSSL_malloc(jj+10);
 454                 if (tmp == NULL)
 455                         {
 456                         PKCS7err(PKCS7_F_PKCS7_DATADECODE,ERR_R_MALLOC_FAILURE);
 457                         goto err;
 458                         }
 459
 460                 /* If we haven't got a certificate try each ri in turn */
 461
 462                 if (pcert == NULL)
 463                         {
 464                         for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
 465                                 {
 466                                 ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
 467                                 jj=EVP_PKEY_decrypt(tmp,
 468                                         M_ASN1_STRING_data(ri->enc_key),
 469                                         M_ASN1_STRING_length(ri->enc_key),
 470                                                 pkey);
 471                                 if (jj > 0)
 472                                         break;
 473                                 ERR_clear_error();
 474                                 ri = NULL;
 475                                 }
 476                         if (ri == NULL)
 477                                 {
 478                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
 479                                       PKCS7_R_NO_RECIPIENT_MATCHES_KEY);
 480                                 goto err;
 481                                 }
 482                         }
 483                 else
 484                         {
 485                         jj=EVP_PKEY_decrypt(tmp,
 486                                 M_ASN1_STRING_data(ri->enc_key),
 487                                 M_ASN1_STRING_length(ri->enc_key), pkey);
 488                         if (jj <= 0)
 489                                 {
 490                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
 491                                                                 ERR_R_EVP_LIB);
 492                                 goto err;
 493                                 }
 494                         }
 495
 496                 evp_ctx=NULL;
 497                 BIO_get_cipher_ctx(etmp,&evp_ctx);
 498                 if (EVP_CipherInit_ex(evp_ctx,evp_cipher,NULL,NULL,NULL,0) <= 0)
 499                         goto err;
 500                 if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
 501                         goto err;
 502
 503                 if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) {
 504                         /* Some S/MIME clients don't use the same key
 505                          * and effective key length. The key length is
 506                          * determined by the size of the decrypted RSA key.
 507                          */
 508                         if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
 509                                 {
 510                                 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
 511                                         PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
 512                                 goto err;
 513                                 }
 514                 }
 515                 if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)
 516                         goto err;
 517
 518                 OPENSSL_cleanse(tmp,jj);
 519
 520                 if (out == NULL)
 521                         out=etmp;
 522                 else
 523                         BIO_push(out,etmp);
 524                 etmp=NULL;
 525                 }
 526
 527 #if 1
 528         if (PKCS7_is_detached(p7) || (in_bio != NULL))
 529                 {
 530                 bio=in_bio;
 531                 }
 532         else
 533                 {
 534 #if 0
 535                 bio=BIO_new(BIO_s_mem());
 536                 /* We need to set this so that when we have read all
 537                  * the data, the encrypt BIO, if present, will read
 538                  * EOF and encode the last few bytes */
 539                 BIO_set_mem_eof_return(bio,0);
 540
 541                 if (data_body->length > 0)
 542                         BIO_write(bio,(char *)data_body->data,data_body->length);
 543 #else
 544                 if (data_body->length > 0)
 545                       bio = BIO_new_mem_buf(data_body->data,data_body->length);
 546                 else {
 547                         bio=BIO_new(BIO_s_mem());
 548                         BIO_set_mem_eof_return(bio,0);
 549                 }
 550                 if (bio == NULL)
 551                         goto err;
 552 #endif
 553                 }
 554         BIO_push(out,bio);
 555         bio=NULL;
 556 #endif
 557         if (0)
 558                 {
 559 err:
 560                 if (out != NULL) BIO_free_all(out);
 561                 if (btmp != NULL) BIO_free_all(btmp);
 562                 if (etmp != NULL) BIO_free_all(etmp);
 563                 if (bio != NULL) BIO_free_all(bio);
 564                 out=NULL;
 565                 }
 566         if (tmp != NULL)
 567                 OPENSSL_free(tmp);
 568         return(out);
 569         }
 570
 571 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
 572         {
 573         for (;;)
 574                 {
 575                 bio=BIO_find_type(bio,BIO_TYPE_MD);
 576                 if (bio == NULL)
 577                         {
 578                         PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 579                         return NULL;
 580                         }
 581                 BIO_get_md_ctx(bio,pmd);
 582                 if (*pmd == NULL)
 583                         {
 584                         PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,ERR_R_INTERNAL_ERROR);
 585                         return NULL;
 586                         }
 587                 if (EVP_MD_CTX_type(*pmd) == nid)
 588                         return bio;
 589                 bio=BIO_next(bio);
 590                 }
 591         return NULL;
 592         }
 593
 594 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
 595         {
 596         int ret=0;
 597         int i,j;
 598         BIO *btmp;
 599         BUF_MEM *buf_mem=NULL;
 600         BUF_MEM *buf=NULL;
 601         PKCS7_SIGNER_INFO *si;
 602         EVP_MD_CTX *mdc,ctx_tmp;
 603         STACK_OF(X509_ATTRIBUTE) *sk;
 604         STACK_OF(PKCS7_SIGNER_INFO) *si_sk=NULL;
 605         ASN1_OCTET_STRING *os=NULL;
 606
 607         EVP_MD_CTX_init(&ctx_tmp);
 608         i=OBJ_obj2nid(p7->type);
 609         p7->state=PKCS7_S_HEADER;
 610
 611         switch (i)
 612                 {
 613         case NID_pkcs7_signedAndEnveloped:
 614                 /* XXXXXXXXXXXXXXXX */
 615                 si_sk=p7->d.signed_and_enveloped->signer_info;
 616                 if (!(os=M_ASN1_OCTET_STRING_new()))
 617                         {
 618                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
 619                         goto err;
 620                         }
 621                 p7->d.signed_and_enveloped->enc_data->enc_data=os;
 622                 break;
 623         case NID_pkcs7_enveloped:
 624                 /* XXXXXXXXXXXXXXXX */
 625                 if (!(os=M_ASN1_OCTET_STRING_new()))
 626                         {
 627                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_MALLOC_FAILURE);
 628                         goto err;
 629                         }
 630                 p7->d.enveloped->enc_data->enc_data=os;
 631                 break;
 632         case NID_pkcs7_signed:
 633                 si_sk=p7->d.sign->signer_info;
 634                 os=PKCS7_get_octet_string(p7->d.sign->contents);
 635                 /* If detached data then the content is excluded */
 636                 if(PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
 637                         M_ASN1_OCTET_STRING_free(os);
 638                         p7->d.sign->contents->d.data = NULL;
 639                 }
 640                 break;
 641
 642         case NID_pkcs7_digest:
 643                 os=PKCS7_get_octet_string(p7->d.digest->contents);
 644                 /* If detached data then the content is excluded */
 645                 if(PKCS7_type_is_data(p7->d.digest->contents) && p7->detached)
 646                         {
 647                         M_ASN1_OCTET_STRING_free(os);
 648                         p7->d.digest->contents->d.data = NULL;
 649                         }
 650                 break;
 651
 652                 }
 653
 654         if (si_sk != NULL)
 655                 {
 656                 if ((buf=BUF_MEM_new()) == NULL)
 657                         {
 658                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
 659                         goto err;
 660                         }
 661                 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(si_sk); i++)
 662                         {
 663                         si=sk_PKCS7_SIGNER_INFO_value(si_sk,i);
 664                         if (si->pkey == NULL) continue;
 665
 666                         j=OBJ_obj2nid(si->digest_alg->algorithm);
 667
 668                         btmp=bio;
 669
 670                         btmp = PKCS7_find_digest(&mdc, btmp, j);
 671
 672                         if (btmp == NULL)
 673                                 goto err;
 674
 675                         /* We now have the EVP_MD_CTX, lets do the
 676                          * signing. */
 677                         EVP_MD_CTX_copy_ex(&ctx_tmp,mdc);
 678                         if (!BUF_MEM_grow_clean(buf,EVP_PKEY_size(si->pkey)))
 679                                 {
 680                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_BIO_LIB);
 681                                 goto err;
 682                                 }
 683
 684                         sk=si->auth_attr;
 685
 686                         /* If there are attributes, we add the digest
 687                          * attribute and only sign the attributes */
 688                         if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
 689                                 {
 690                                 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf=NULL;
 691                                 unsigned int md_len, alen;
 692                                 ASN1_OCTET_STRING *digest;
 693                                 ASN1_UTCTIME *sign_time;
 694                                 const EVP_MD *md_tmp;
 695
 696                                 /* Add signing time if not already present */
 697                                 if (!PKCS7_get_signed_attribute(si,
 698                                                         NID_pkcs9_signingTime))
 699                                         {
 700                                         if (!(sign_time=X509_gmtime_adj(NULL,0)))
 701                                                 {
 702                                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 703                                                         ERR_R_MALLOC_FAILURE);
 704                                                 goto err;
 705                                                 }
 706                                         if (!PKCS7_add_signed_attribute(si,
 707                                                 NID_pkcs9_signingTime,
 708                                                 V_ASN1_UTCTIME,sign_time))
 709                                                 {
 710                                                 M_ASN1_UTCTIME_free(sign_time);
 711                                                 goto err;
 712                                                 }
 713                                         }
 714
 715                                 /* Add digest */
 716                                 md_tmp=EVP_MD_CTX_md(&ctx_tmp);
 717                                 EVP_DigestFinal_ex(&ctx_tmp,md_data,&md_len);
 718                                 if (!(digest=M_ASN1_OCTET_STRING_new()))
 719                                         {
 720                                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 721                                                 ERR_R_MALLOC_FAILURE);
 722                                         goto err;
 723                                         }
 724                                 if (!M_ASN1_OCTET_STRING_set(digest,md_data,
 725                                                                 md_len))
 726                                         {
 727                                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
 728                                                 ERR_R_MALLOC_FAILURE);
 729                                         M_ASN1_OCTET_STRING_free(digest);
 730                                         goto err;
 731                                         }
 732                                 if (!PKCS7_add_signed_attribute(si,
 733                                         NID_pkcs9_messageDigest,
 734                                         V_ASN1_OCTET_STRING,digest))
 735                                         {
 736                                         M_ASN1_OCTET_STRING_free(digest);
 737                                         goto err;
 738                                         }
 739
 740                                 /* Now sign the attributes */
 741                                 EVP_SignInit_ex(&ctx_tmp,md_tmp,NULL);
 742                                 alen = ASN1_item_i2d((ASN1_VALUE *)sk,&abuf,
 743                                                         ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
 744                                 if(!abuf) goto err;
 745                                 EVP_SignUpdate(&ctx_tmp,abuf,alen);
 746                                 OPENSSL_free(abuf);
 747                                 }
 748
 749 #ifndef OPENSSL_NO_DSA
 750                         if (si->pkey->type == EVP_PKEY_DSA)
 751                                 ctx_tmp.digest=EVP_dss1();
 752 #endif
 753 #ifndef OPENSSL_NO_ECDSA
 754                         if (si->pkey->type == EVP_PKEY_EC)
 755                                 ctx_tmp.digest=EVP_ecdsa();
 756 #endif
 757
 758                         if (!EVP_SignFinal(&ctx_tmp,(unsigned char *)buf->data,
 759                                 (unsigned int *)&buf->length,si->pkey))
 760                                 {
 761                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_EVP_LIB);
 762                                 goto err;
 763                                 }
 764                         if (!ASN1_STRING_set(si->enc_digest,
 765                                 (unsigned char *)buf->data,buf->length))
 766                                 {
 767                                 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,ERR_R_ASN1_LIB);
 768                                 goto err;
 769                                 }
 770                         }
 771                 }
 772         else if (i == NID_pkcs7_digest)
 773                 {
 774                 unsigned char md_data[EVP_MAX_MD_SIZE];
 775                 unsigned int md_len;
 776                 if (!PKCS7_find_digest(&mdc, bio,
 777                                 OBJ_obj2nid(p7->d.digest->md->algorithm)))
 778                         goto err;
 779                 EVP_DigestFinal_ex(mdc,md_data,&md_len);
 780                 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
 781                 }
 782
 783         if (!PKCS7_is_detached(p7))
 784                 {
 785                 btmp=BIO_find_type(bio,BIO_TYPE_MEM);
 786                 if (btmp == NULL)
 787                         {
 788                         PKCS7err(PKCS7_F_PKCS7_DATAFINAL,PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
 789                         goto err;
 790                         }
 791                 BIO_get_mem_ptr(btmp,&buf_mem);
 792                 /* Mark the BIO read only then we can use its copy of the data
 793                  * instead of making an extra copy.
 794                  */
 795                 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
 796                 BIO_set_mem_eof_return(btmp, 0);
 797                 os->data = (unsigned char *)buf_mem->data;
 798                 os->length = buf_mem->length;
 799 #if 0
 800                 M_ASN1_OCTET_STRING_set(os,
 801                         (unsigned char *)buf_mem->data,buf_mem->length);
 802 #endif
 803                 }
 804         ret=1;
 805 err:
 806         EVP_MD_CTX_cleanup(&ctx_tmp);
 807         if (buf != NULL) BUF_MEM_free(buf);
 808         return(ret);
 809         }
 810
 811 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
 812              PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 813         {
 814         PKCS7_ISSUER_AND_SERIAL *ias;
 815         int ret=0,i;
 816         STACK_OF(X509) *cert;
 817         X509 *x509;
 818
 819         if (PKCS7_type_is_signed(p7))
 820                 {
 821                 cert=p7->d.sign->cert;
 822                 }
 823         else if (PKCS7_type_is_signedAndEnveloped(p7))
 824                 {
 825                 cert=p7->d.signed_and_enveloped->cert;
 826                 }
 827         else
 828                 {
 829                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_WRONG_PKCS7_TYPE);
 830                 goto err;
 831                 }
 832         /* XXXXXXXXXXXXXXXXXXXXXXX */
 833         ias=si->issuer_and_serial;
 834
 835         x509=X509_find_by_issuer_and_serial(cert,ias->issuer,ias->serial);
 836
 837         /* were we able to find the cert in passed to us */
 838         if (x509 == NULL)
 839                 {
 840                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
 841                 goto err;
 842                 }
 843
 844         /* Lets verify */
 845         if(!X509_STORE_CTX_init(ctx,cert_store,x509,cert))
 846                 {
 847                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
 848                 goto err;
 849                 }
 850         X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
 851         i=X509_verify_cert(ctx);
 852         if (i <= 0)
 853                 {
 854                 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,ERR_R_X509_LIB);
 855                 X509_STORE_CTX_cleanup(ctx);
 856                 goto err;
 857                 }
 858         X509_STORE_CTX_cleanup(ctx);
 859
 860         return PKCS7_signatureVerify(bio, p7, si, x509);
 861         err:
 862         return ret;
 863         }
 864
 865 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
 866                                                                 X509 *x509)
 867         {
 868         ASN1_OCTET_STRING *os;
 869         EVP_MD_CTX mdc_tmp,*mdc;
 870         int ret=0,i;
 871         int md_type;
 872         STACK_OF(X509_ATTRIBUTE) *sk;
 873         BIO *btmp;
 874         EVP_PKEY *pkey;
 875
 876         EVP_MD_CTX_init(&mdc_tmp);
 877
 878         if (!PKCS7_type_is_signed(p7) &&
 879                                 !PKCS7_type_is_signedAndEnveloped(p7)) {
 880                 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 881                                                 PKCS7_R_WRONG_PKCS7_TYPE);
 882                 goto err;
 883         }
 884
 885         md_type=OBJ_obj2nid(si->digest_alg->algorithm);
 886
 887         btmp=bio;
 888         for (;;)
 889                 {
 890                 if ((btmp == NULL) ||
 891                         ((btmp=BIO_find_type(btmp,BIO_TYPE_MD)) == NULL))
 892                         {
 893                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 894                                         PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 895                         goto err;
 896                         }
 897                 BIO_get_md_ctx(btmp,&mdc);
 898                 if (mdc == NULL)
 899                         {
 900                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 901                                                         ERR_R_INTERNAL_ERROR);
 902                         goto err;
 903                         }
 904                 if (EVP_MD_CTX_type(mdc) == md_type)
 905                         break;
 906                 /* Workaround for some broken clients that put the signature
 907                  * OID instead of the digest OID in digest_alg->algorithm
 908                  */
 909                 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
 910                         break;
 911                 btmp=BIO_next(btmp);
 912                 }
 913
 914         /* mdc is the digest ctx that we want, unless there are attributes,
 915          * in which case the digest is the signed attributes */
 916         EVP_MD_CTX_copy_ex(&mdc_tmp,mdc);
 917
 918         sk=si->auth_attr;
 919         if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0))
 920                 {
 921                 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
 922                 unsigned int md_len, alen;
 923                 ASN1_OCTET_STRING *message_digest;
 924
 925                 EVP_DigestFinal_ex(&mdc_tmp,md_dat,&md_len);
 926                 message_digest=PKCS7_digest_from_attributes(sk);
 927                 if (!message_digest)
 928                         {
 929                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 930                                         PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
 931                         goto err;
 932                         }
 933                 if ((message_digest->length != (int)md_len) ||
 934                         (memcmp(message_digest->data,md_dat,md_len)))
 935                         {
 936 #if 0
 937 {
 938 int ii;
 939 for (ii=0; ii<message_digest->length; ii++)
 940         printf("%02X",message_digest->data[ii]); printf(" sent\n");
 941 for (ii=0; ii<md_len; ii++) printf("%02X",md_dat[ii]); printf(" calc\n");
 942 }
 943 #endif
 944                         PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 945                                                         PKCS7_R_DIGEST_FAILURE);
 946                         ret= -1;
 947                         goto err;
 948                         }
 949
 950                 EVP_VerifyInit_ex(&mdc_tmp,EVP_get_digestbynid(md_type), NULL);
 951
 952                 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
 953                                                 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
 954                 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
 955
 956                 OPENSSL_free(abuf);
 957                 }
 958
 959         os=si->enc_digest;
 960         pkey = X509_get_pubkey(x509);
 961         if (!pkey)
 962                 {
 963                 ret = -1;
 964                 goto err;
 965                 }
 966 #ifndef OPENSSL_NO_DSA
 967         if(pkey->type == EVP_PKEY_DSA) mdc_tmp.digest=EVP_dss1();
 968 #endif
 969 #ifndef OPENSSL_NO_ECDSA
 970         if (pkey->type == EVP_PKEY_EC) mdc_tmp.digest=EVP_ecdsa();
 971 #endif
 972
 973         i=EVP_VerifyFinal(&mdc_tmp,os->data,os->length, pkey);
 974         EVP_PKEY_free(pkey);
 975         if (i <= 0)
 976                 {
 977                 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
 978                                                 PKCS7_R_SIGNATURE_FAILURE);
 979                 ret= -1;
 980                 goto err;
 981                 }
 982         else
 983                 ret=1;
 984 err:
 985         EVP_MD_CTX_cleanup(&mdc_tmp);
 986         return(ret);
 987         }
 988
 989 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
 990         {
 991         STACK_OF(PKCS7_RECIP_INFO) *rsk;
 992         PKCS7_RECIP_INFO *ri;
 993         int i;
 994
 995         i=OBJ_obj2nid(p7->type);
 996         if (i != NID_pkcs7_signedAndEnveloped)
 997                 return NULL;
 998         if (p7->d.signed_and_enveloped == NULL)
 999                 return NULL;
1000         rsk=p7->d.signed_and_enveloped->recipientinfo;
1001         if (rsk == NULL)
1002                 return NULL;
1003         ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
1004         if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) return(NULL);
1005         ri=sk_PKCS7_RECIP_INFO_value(rsk,idx);
1006         return(ri->issuer_and_serial);
1007         }
1008
1009 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1010         {
1011         return(get_attribute(si->auth_attr,nid));
1012         }
1013
1014 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1015         {
1016         return(get_attribute(si->unauth_attr,nid));
1017         }
1018
1019 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1020         {
1021         int i;
1022         X509_ATTRIBUTE *xa;
1023         ASN1_OBJECT *o;
1024
1025         o=OBJ_nid2obj(nid);
1026         if (!o || !sk) return(NULL);
1027         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1028                 {
1029                 xa=sk_X509_ATTRIBUTE_value(sk,i);
1030                 if (OBJ_cmp(xa->object,o) == 0)
1031                         {
1032                         if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1033                                 return(sk_ASN1_TYPE_value(xa->value.set,0));
1034                         else
1035                                 return(NULL);
1036                         }
1037                 }
1038         return(NULL);
1039         }
1040
1041 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1042 {
1043         ASN1_TYPE *astype;
1044         if(!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) return NULL;
1045         return astype->value.octet_string;
1046 }
1047
1048 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1049                                 STACK_OF(X509_ATTRIBUTE) *sk)
1050         {
1051         int i;
1052
1053         if (p7si->auth_attr != NULL)
1054                 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr,X509_ATTRIBUTE_free);
1055         p7si->auth_attr=sk_X509_ATTRIBUTE_dup(sk);
1056         if (p7si->auth_attr == NULL)
1057                 return 0;
1058         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1059                 {
1060                 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr,i,
1061                         X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1062                     == NULL)
1063                         return(0);
1064                 }
1065         return(1);
1066         }
1067
1068 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, STACK_OF(X509_ATTRIBUTE) *sk)
1069         {
1070         int i;
1071
1072         if (p7si->unauth_attr != NULL)
1073                 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr,
1074                                            X509_ATTRIBUTE_free);
1075         p7si->unauth_attr=sk_X509_ATTRIBUTE_dup(sk);
1076         if (p7si->unauth_attr == NULL)
1077                 return 0;
1078         for (i=0; i<sk_X509_ATTRIBUTE_num(sk); i++)
1079                 {
1080                 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr,i,
1081                         X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value(sk,i))))
1082                     == NULL)
1083                         return(0);
1084                 }
1085         return(1);
1086         }
1087
1088 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1089              void *value)
1090         {
1091         return(add_attribute(&(p7si->auth_attr),nid,atrtype,value));
1092         }
1093
1094 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1095              void *value)
1096         {
1097         return(add_attribute(&(p7si->unauth_attr),nid,atrtype,value));
1098         }
1099
1100 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1101                          void *value)
1102         {
1103         X509_ATTRIBUTE *attr=NULL;
1104
1105         if (*sk == NULL)
1106                 {
1107                 if (!(*sk = sk_X509_ATTRIBUTE_new_null()))
1108                         return 0;
1109 new_attrib:
1110                 if (!(attr=X509_ATTRIBUTE_create(nid,atrtype,value)))
1111                         return 0;
1112                 if (!sk_X509_ATTRIBUTE_push(*sk,attr))
1113                         {
1114                         X509_ATTRIBUTE_free(attr);
1115                         return 0;
1116                         }
1117                 }
1118         else
1119                 {
1120                 int i;
1121
1122                 for (i=0; i<sk_X509_ATTRIBUTE_num(*sk); i++)
1123                         {
1124                         attr=sk_X509_ATTRIBUTE_value(*sk,i);
1125                         if (OBJ_obj2nid(attr->object) == nid)
1126                                 {
1127                                 X509_ATTRIBUTE_free(attr);
1128                                 attr=X509_ATTRIBUTE_create(nid,atrtype,value);
1129                                 if (attr == NULL)
1130                                         return 0;
1131                                 if (!sk_X509_ATTRIBUTE_set(*sk,i,attr))
1132                                         {
1133                                         X509_ATTRIBUTE_free(attr);
1134                                         return 0;
1135                                         }
1136                                 goto end;
1137                                 }
1138                         }
1139                 goto new_attrib;
1140                 }
1141 end:
1142         return(1);
1143         }
1144