crypto/openssl-0.9/crypto/pkcs7/pk7_lib.c

   1 /* crypto/pkcs7/pk7_lib.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/objects.h>
  62 #include <openssl/x509.h>
  63
  64 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
  65         {
  66         int nid;
  67         long ret;
  68
  69         nid=OBJ_obj2nid(p7->type);
  70
  71         switch (cmd)
  72                 {
  73         case PKCS7_OP_SET_DETACHED_SIGNATURE:
  74                 if (nid == NID_pkcs7_signed)
  75                         {
  76                         ret=p7->detached=(int)larg;
  77                         if (ret && PKCS7_type_is_data(p7->d.sign->contents))
  78                                         {
  79                                         ASN1_OCTET_STRING *os;
  80                                         os=p7->d.sign->contents->d.data;
  81                                         ASN1_OCTET_STRING_free(os);
  82                                         p7->d.sign->contents->d.data = NULL;
  83                                         }
  84                         }
  85                 else
  86                         {
  87                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
  88                         ret=0;
  89                         }
  90                 break;
  91         case PKCS7_OP_GET_DETACHED_SIGNATURE:
  92                 if (nid == NID_pkcs7_signed)
  93                         {
  94                         if(!p7->d.sign  || !p7->d.sign->contents->d.ptr)
  95                                 ret = 1;
  96                         else ret = 0;
  97
  98                         p7->detached = ret;
  99                         }
 100                 else
 101                         {
 102                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
 103                         ret=0;
 104                         }
 105
 106                 break;
 107         default:
 108                 PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);
 109                 ret=0;
 110                 }
 111         return(ret);
 112         }
 113
 114 int PKCS7_content_new(PKCS7 *p7, int type)
 115         {
 116         PKCS7 *ret=NULL;
 117
 118         if ((ret=PKCS7_new()) == NULL) goto err;
 119         if (!PKCS7_set_type(ret,type)) goto err;
 120         if (!PKCS7_set_content(p7,ret)) goto err;
 121
 122         return(1);
 123 err:
 124         if (ret != NULL) PKCS7_free(ret);
 125         return(0);
 126         }
 127
 128 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
 129         {
 130         int i;
 131
 132         i=OBJ_obj2nid(p7->type);
 133         switch (i)
 134                 {
 135         case NID_pkcs7_signed:
 136                 if (p7->d.sign->contents != NULL)
 137                         PKCS7_free(p7->d.sign->contents);
 138                 p7->d.sign->contents=p7_data;
 139                 break;
 140         case NID_pkcs7_digest:
 141                 if (p7->d.digest->contents != NULL)
 142                         PKCS7_free(p7->d.digest->contents);
 143                 p7->d.digest->contents=p7_data;
 144                 break;
 145         case NID_pkcs7_data:
 146         case NID_pkcs7_enveloped:
 147         case NID_pkcs7_signedAndEnveloped:
 148         case NID_pkcs7_encrypted:
 149         default:
 150                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 151                 goto err;
 152                 }
 153         return(1);
 154 err:
 155         return(0);
 156         }
 157
 158 int PKCS7_set_type(PKCS7 *p7, int type)
 159         {
 160         ASN1_OBJECT *obj;
 161
 162         /*PKCS7_content_free(p7);*/
 163         obj=OBJ_nid2obj(type); /* will not fail */
 164
 165         switch (type)
 166                 {
 167         case NID_pkcs7_signed:
 168                 p7->type=obj;
 169                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
 170                         goto err;
 171                 if (!ASN1_INTEGER_set(p7->d.sign->version,1))
 172                         {
 173                         PKCS7_SIGNED_free(p7->d.sign);
 174                         p7->d.sign=NULL;
 175                         goto err;
 176                         }
 177                 break;
 178         case NID_pkcs7_data:
 179                 p7->type=obj;
 180                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
 181                         goto err;
 182                 break;
 183         case NID_pkcs7_signedAndEnveloped:
 184                 p7->type=obj;
 185                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
 186                         == NULL) goto err;
 187                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
 188                 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1))
 189                         goto err;
 190                 p7->d.signed_and_enveloped->enc_data->content_type
 191                                                 = OBJ_nid2obj(NID_pkcs7_data);
 192                 break;
 193         case NID_pkcs7_enveloped:
 194                 p7->type=obj;
 195                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 196                         == NULL) goto err;
 197                 if (!ASN1_INTEGER_set(p7->d.enveloped->version,0))
 198                         goto err;
 199                 p7->d.enveloped->enc_data->content_type
 200                                                 = OBJ_nid2obj(NID_pkcs7_data);
 201                 break;
 202         case NID_pkcs7_encrypted:
 203                 p7->type=obj;
 204                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
 205                         == NULL) goto err;
 206                 if (!ASN1_INTEGER_set(p7->d.encrypted->version,0))
 207                         goto err;
 208                 p7->d.encrypted->enc_data->content_type
 209                                                 = OBJ_nid2obj(NID_pkcs7_data);
 210                 break;
 211
 212         case NID_pkcs7_digest:
 213                 p7->type=obj;
 214                 if ((p7->d.digest=PKCS7_DIGEST_new())
 215                         == NULL) goto err;
 216                 if (!ASN1_INTEGER_set(p7->d.digest->version,0))
 217                         goto err;
 218                 break;
 219         default:
 220                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 221                 goto err;
 222                 }
 223         return(1);
 224 err:
 225         return(0);
 226         }
 227
 228 int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
 229         {
 230         p7->type = OBJ_nid2obj(type);
 231         p7->d.other = other;
 232         return 1;
 233         }
 234
 235 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 236         {
 237         int i,j,nid;
 238         X509_ALGOR *alg;
 239         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 240         STACK_OF(X509_ALGOR) *md_sk;
 241
 242         i=OBJ_obj2nid(p7->type);
 243         switch (i)
 244                 {
 245         case NID_pkcs7_signed:
 246                 signer_sk=      p7->d.sign->signer_info;
 247                 md_sk=          p7->d.sign->md_algs;
 248                 break;
 249         case NID_pkcs7_signedAndEnveloped:
 250                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 251                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 252                 break;
 253         default:
 254                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 255                 return(0);
 256                 }
 257
 258         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 259
 260         /* If the digest is not currently listed, add it */
 261         j=0;
 262         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 263                 {
 264                 alg=sk_X509_ALGOR_value(md_sk,i);
 265                 if (OBJ_obj2nid(alg->algorithm) == nid)
 266                         {
 267                         j=1;
 268                         break;
 269                         }
 270                 }
 271         if (!j) /* we need to add another algorithm */
 272                 {
 273                 if(!(alg=X509_ALGOR_new())
 274                         || !(alg->parameter = ASN1_TYPE_new()))
 275                         {
 276                         X509_ALGOR_free(alg);
 277                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
 278                         return(0);
 279                         }
 280                 alg->algorithm=OBJ_nid2obj(nid);
 281                 alg->parameter->type = V_ASN1_NULL;
 282                 if (!sk_X509_ALGOR_push(md_sk,alg))
 283                         {
 284                         X509_ALGOR_free(alg);
 285                         return 0;
 286                         }
 287                 }
 288
 289         if (!sk_PKCS7_SIGNER_INFO_push(signer_sk,psi))
 290                 return 0;
 291         return(1);
 292         }
 293
 294 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 295         {
 296         int i;
 297         STACK_OF(X509) **sk;
 298
 299         i=OBJ_obj2nid(p7->type);
 300         switch (i)
 301                 {
 302         case NID_pkcs7_signed:
 303                 sk= &(p7->d.sign->cert);
 304                 break;
 305         case NID_pkcs7_signedAndEnveloped:
 306                 sk= &(p7->d.signed_and_enveloped->cert);
 307                 break;
 308         default:
 309                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 310                 return(0);
 311                 }
 312
 313         if (*sk == NULL)
 314                 *sk=sk_X509_new_null();
 315         if (*sk == NULL)
 316                 {
 317                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,ERR_R_MALLOC_FAILURE);
 318                 return 0;
 319                 }
 320         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 321         if (!sk_X509_push(*sk,x509))
 322                 {
 323                 X509_free(x509);
 324                 return 0;
 325                 }
 326         return(1);
 327         }
 328
 329 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 330         {
 331         int i;
 332         STACK_OF(X509_CRL) **sk;
 333
 334         i=OBJ_obj2nid(p7->type);
 335         switch (i)
 336                 {
 337         case NID_pkcs7_signed:
 338                 sk= &(p7->d.sign->crl);
 339                 break;
 340         case NID_pkcs7_signedAndEnveloped:
 341                 sk= &(p7->d.signed_and_enveloped->crl);
 342                 break;
 343         default:
 344                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 345                 return(0);
 346                 }
 347
 348         if (*sk == NULL)
 349                 *sk=sk_X509_CRL_new_null();
 350         if (*sk == NULL)
 351                 {
 352                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,ERR_R_MALLOC_FAILURE);
 353                 return 0;
 354                 }
 355
 356         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 357         if (!sk_X509_CRL_push(*sk,crl))
 358                 {
 359                 X509_CRL_free(crl);
 360                 return 0;
 361                 }
 362         return(1);
 363         }
 364
 365 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 366              const EVP_MD *dgst)
 367         {
 368         int nid;
 369         char is_dsa;
 370
 371         if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)
 372                 is_dsa = 1;
 373         else
 374                 is_dsa = 0;
 375         /* We now need to add another PKCS7_SIGNER_INFO entry */
 376         if (!ASN1_INTEGER_set(p7i->version,1))
 377                 goto err;
 378         if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 379                         X509_get_issuer_name(x509)))
 380                 goto err;
 381
 382         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 383          * things the ugly way. */
 384         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 385         if (!(p7i->issuer_and_serial->serial=
 386                         M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 387                 goto err;
 388
 389         /* lets keep the pkey around for a while */
 390         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 391         p7i->pkey=pkey;
 392
 393         /* Set the algorithms */
 394         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 395         else
 396                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 397
 398         if (p7i->digest_alg->parameter != NULL)
 399                 ASN1_TYPE_free(p7i->digest_alg->parameter);
 400         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
 401                 goto err;
 402         p7i->digest_alg->parameter->type=V_ASN1_NULL;
 403
 404         if (p7i->digest_enc_alg->parameter != NULL)
 405                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 406         nid = EVP_PKEY_type(pkey->type);
 407         if (nid == EVP_PKEY_RSA)
 408                 {
 409                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_rsaEncryption);
 410                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 411                         goto err;
 412                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 413                 }
 414         else if (nid == EVP_PKEY_DSA)
 415                 {
 416 #if 1
 417                 /* use 'dsaEncryption' OID for compatibility with other software
 418                  * (PKCS #7 v1.5 does specify how to handle DSA) ... */
 419                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsa);
 420 #else
 421                 /* ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for CMS)
 422                  * would make more sense. */
 423                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsaWithSHA1);
 424 #endif
 425                 p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit 'parameter'! */
 426                 }
 427         else if (nid == EVP_PKEY_EC)
 428                 {
 429                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_ecdsa_with_SHA1);
 430                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 431                         goto err;
 432                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 433                 }
 434         else
 435                 return(0);
 436
 437         return(1);
 438 err:
 439         return(0);
 440         }
 441
 442 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 443              const EVP_MD *dgst)
 444         {
 445         PKCS7_SIGNER_INFO *si;
 446
 447         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 448         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 449         if (!PKCS7_add_signer(p7,si)) goto err;
 450         return(si);
 451 err:
 452         PKCS7_SIGNER_INFO_free(si);
 453         return(NULL);
 454         }
 455
 456 int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
 457         {
 458         if (PKCS7_type_is_digest(p7))
 459                 {
 460                 if(!(p7->d.digest->md->parameter = ASN1_TYPE_new()))
 461                         {
 462                         PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,ERR_R_MALLOC_FAILURE);
 463                         return 0;
 464                         }
 465                 p7->d.digest->md->parameter->type = V_ASN1_NULL;
 466                 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
 467                 return 1;
 468                 }
 469
 470         PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,PKCS7_R_WRONG_CONTENT_TYPE);
 471         return 1;
 472         }
 473
 474 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 475         {
 476         if (PKCS7_type_is_signed(p7))
 477                 {
 478                 return(p7->d.sign->signer_info);
 479                 }
 480         else if (PKCS7_type_is_signedAndEnveloped(p7))
 481                 {
 482                 return(p7->d.signed_and_enveloped->signer_info);
 483                 }
 484         else
 485                 return(NULL);
 486         }
 487
 488 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 489         {
 490         PKCS7_RECIP_INFO *ri;
 491
 492         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 493         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 494         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 495         return(ri);
 496 err:
 497         PKCS7_RECIP_INFO_free(ri);
 498         return(NULL);
 499         }
 500
 501 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 502         {
 503         int i;
 504         STACK_OF(PKCS7_RECIP_INFO) *sk;
 505
 506         i=OBJ_obj2nid(p7->type);
 507         switch (i)
 508                 {
 509         case NID_pkcs7_signedAndEnveloped:
 510                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 511                 break;
 512         case NID_pkcs7_enveloped:
 513                 sk=     p7->d.enveloped->recipientinfo;
 514                 break;
 515         default:
 516                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 517                 return(0);
 518                 }
 519
 520         if (!sk_PKCS7_RECIP_INFO_push(sk,ri))
 521                 return 0;
 522         return(1);
 523         }
 524
 525 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 526         {
 527         if (!ASN1_INTEGER_set(p7i->version,0))
 528                 return 0;
 529         if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 530                 X509_get_issuer_name(x509)))
 531                 return 0;
 532
 533         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 534         if (!(p7i->issuer_and_serial->serial=
 535                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 536                 return 0;
 537
 538         X509_ALGOR_free(p7i->key_enc_algor);
 539         if (!(p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor)))
 540                 return 0;
 541
 542         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 543         p7i->cert=x509;
 544
 545         return(1);
 546         }
 547
 548 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 549         {
 550         if (PKCS7_type_is_signed(p7))
 551                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 552                         si->issuer_and_serial->issuer,
 553                         si->issuer_and_serial->serial));
 554         else
 555                 return(NULL);
 556         }
 557
 558 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 559         {
 560         int i;
 561         ASN1_OBJECT *objtmp;
 562         PKCS7_ENC_CONTENT *ec;
 563
 564         i=OBJ_obj2nid(p7->type);
 565         switch (i)
 566                 {
 567         case NID_pkcs7_signedAndEnveloped:
 568                 ec=p7->d.signed_and_enveloped->enc_data;
 569                 break;
 570         case NID_pkcs7_enveloped:
 571                 ec=p7->d.enveloped->enc_data;
 572                 break;
 573         default:
 574                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 575                 return(0);
 576                 }
 577
 578         /* Check cipher OID exists and has data in it*/
 579         i = EVP_CIPHER_type(cipher);
 580         if(i == NID_undef) {
 581                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 582                 return(0);
 583         }
 584         objtmp = OBJ_nid2obj(i);
 585
 586         ec->cipher = cipher;
 587         return 1;
 588         }
 589