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                 break;
 191                 p7->d.signed_and_enveloped->enc_data->content_type
 192                                                 = OBJ_nid2obj(NID_pkcs7_data);
 193                 break;
 194         case NID_pkcs7_enveloped:
 195                 p7->type=obj;
 196                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 197                         == NULL) goto err;
 198                 if (!ASN1_INTEGER_set(p7->d.enveloped->version,0))
 199                         goto err;
 200                 p7->d.enveloped->enc_data->content_type
 201                                                 = OBJ_nid2obj(NID_pkcs7_data);
 202                 break;
 203         case NID_pkcs7_encrypted:
 204                 p7->type=obj;
 205                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
 206                         == NULL) goto err;
 207                 if (!ASN1_INTEGER_set(p7->d.encrypted->version,0))
 208                         goto err;
 209                 p7->d.encrypted->enc_data->content_type
 210                                                 = OBJ_nid2obj(NID_pkcs7_data);
 211                 break;
 212
 213         case NID_pkcs7_digest:
 214                 p7->type=obj;
 215                 if ((p7->d.digest=PKCS7_DIGEST_new())
 216                         == NULL) goto err;
 217                 if (!ASN1_INTEGER_set(p7->d.digest->version,0))
 218                         goto err;
 219                 break;
 220         default:
 221                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 222                 goto err;
 223                 }
 224         return(1);
 225 err:
 226         return(0);
 227         }
 228
 229 int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
 230         {
 231         p7->type = OBJ_nid2obj(type);
 232         p7->d.other = other;
 233         return 1;
 234         }
 235
 236 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 237         {
 238         int i,j,nid;
 239         X509_ALGOR *alg;
 240         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 241         STACK_OF(X509_ALGOR) *md_sk;
 242
 243         i=OBJ_obj2nid(p7->type);
 244         switch (i)
 245                 {
 246         case NID_pkcs7_signed:
 247                 signer_sk=      p7->d.sign->signer_info;
 248                 md_sk=          p7->d.sign->md_algs;
 249                 break;
 250         case NID_pkcs7_signedAndEnveloped:
 251                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 252                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 253                 break;
 254         default:
 255                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 256                 return(0);
 257                 }
 258
 259         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 260
 261         /* If the digest is not currently listed, add it */
 262         j=0;
 263         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 264                 {
 265                 alg=sk_X509_ALGOR_value(md_sk,i);
 266                 if (OBJ_obj2nid(alg->algorithm) == nid)
 267                         {
 268                         j=1;
 269                         break;
 270                         }
 271                 }
 272         if (!j) /* we need to add another algorithm */
 273                 {
 274                 if(!(alg=X509_ALGOR_new())
 275                         || !(alg->parameter = ASN1_TYPE_new())) {
 276                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
 277                         return(0);
 278                 }
 279                 alg->algorithm=OBJ_nid2obj(nid);
 280                 alg->parameter->type = V_ASN1_NULL;
 281                 sk_X509_ALGOR_push(md_sk,alg);
 282                 }
 283
 284         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
 285         return(1);
 286         }
 287
 288 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 289         {
 290         int i;
 291         STACK_OF(X509) **sk;
 292
 293         i=OBJ_obj2nid(p7->type);
 294         switch (i)
 295                 {
 296         case NID_pkcs7_signed:
 297                 sk= &(p7->d.sign->cert);
 298                 break;
 299         case NID_pkcs7_signedAndEnveloped:
 300                 sk= &(p7->d.signed_and_enveloped->cert);
 301                 break;
 302         default:
 303                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 304                 return(0);
 305                 }
 306
 307         if (*sk == NULL)
 308                 *sk=sk_X509_new_null();
 309         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 310         sk_X509_push(*sk,x509);
 311         return(1);
 312         }
 313
 314 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 315         {
 316         int i;
 317         STACK_OF(X509_CRL) **sk;
 318
 319         i=OBJ_obj2nid(p7->type);
 320         switch (i)
 321                 {
 322         case NID_pkcs7_signed:
 323                 sk= &(p7->d.sign->crl);
 324                 break;
 325         case NID_pkcs7_signedAndEnveloped:
 326                 sk= &(p7->d.signed_and_enveloped->crl);
 327                 break;
 328         default:
 329                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 330                 return(0);
 331                 }
 332
 333         if (*sk == NULL)
 334                 *sk=sk_X509_CRL_new_null();
 335
 336         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 337         sk_X509_CRL_push(*sk,crl);
 338         return(1);
 339         }
 340
 341 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 342              const EVP_MD *dgst)
 343         {
 344         int nid;
 345         char is_dsa;
 346
 347         if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)
 348                 is_dsa = 1;
 349         else
 350                 is_dsa = 0;
 351         /* We now need to add another PKCS7_SIGNER_INFO entry */
 352         if (!ASN1_INTEGER_set(p7i->version,1))
 353                 goto err;
 354         if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 355                         X509_get_issuer_name(x509)))
 356                 goto err;
 357
 358         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 359          * things the ugly way. */
 360         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 361         if (!(p7i->issuer_and_serial->serial=
 362                         M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 363                 goto err;
 364
 365         /* lets keep the pkey around for a while */
 366         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 367         p7i->pkey=pkey;
 368
 369         /* Set the algorithms */
 370         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 371         else
 372                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 373
 374         if (p7i->digest_alg->parameter != NULL)
 375                 ASN1_TYPE_free(p7i->digest_alg->parameter);
 376         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
 377                 goto err;
 378         p7i->digest_alg->parameter->type=V_ASN1_NULL;
 379
 380         if (p7i->digest_enc_alg->parameter != NULL)
 381                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 382         nid = EVP_PKEY_type(pkey->type);
 383         if (nid == EVP_PKEY_RSA)
 384                 {
 385                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_rsaEncryption);
 386                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 387                         goto err;
 388                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 389                 }
 390         else if (nid == EVP_PKEY_DSA)
 391                 {
 392 #if 1
 393                 /* use 'dsaEncryption' OID for compatibility with other software
 394                  * (PKCS #7 v1.5 does specify how to handle DSA) ... */
 395                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsa);
 396 #else
 397                 /* ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for CMS)
 398                  * would make more sense. */
 399                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsaWithSHA1);
 400 #endif
 401                 p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit 'parameter'! */
 402                 }
 403         else if (nid == EVP_PKEY_EC)
 404                 {
 405                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_ecdsa_with_SHA1);
 406                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 407                         goto err;
 408                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 409                 }
 410         else
 411                 return(0);
 412
 413         return(1);
 414 err:
 415         return(0);
 416         }
 417
 418 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 419              const EVP_MD *dgst)
 420         {
 421         PKCS7_SIGNER_INFO *si;
 422
 423         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 424         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 425         if (!PKCS7_add_signer(p7,si)) goto err;
 426         return(si);
 427 err:
 428         return(NULL);
 429         }
 430
 431 int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
 432         {
 433         if (PKCS7_type_is_digest(p7))
 434                 {
 435                 if(!(p7->d.digest->md->parameter = ASN1_TYPE_new()))
 436                         {
 437                         PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,ERR_R_MALLOC_FAILURE);
 438                         return 0;
 439                         }
 440                 p7->d.digest->md->parameter->type = V_ASN1_NULL;
 441                 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
 442                 return 1;
 443                 }
 444
 445         PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,PKCS7_R_WRONG_CONTENT_TYPE);
 446         return 1;
 447         }
 448
 449 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 450         {
 451         if (PKCS7_type_is_signed(p7))
 452                 {
 453                 return(p7->d.sign->signer_info);
 454                 }
 455         else if (PKCS7_type_is_signedAndEnveloped(p7))
 456                 {
 457                 return(p7->d.signed_and_enveloped->signer_info);
 458                 }
 459         else
 460                 return(NULL);
 461         }
 462
 463 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 464         {
 465         PKCS7_RECIP_INFO *ri;
 466
 467         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 468         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 469         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 470         return(ri);
 471 err:
 472         return(NULL);
 473         }
 474
 475 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 476         {
 477         int i;
 478         STACK_OF(PKCS7_RECIP_INFO) *sk;
 479
 480         i=OBJ_obj2nid(p7->type);
 481         switch (i)
 482                 {
 483         case NID_pkcs7_signedAndEnveloped:
 484                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 485                 break;
 486         case NID_pkcs7_enveloped:
 487                 sk=     p7->d.enveloped->recipientinfo;
 488                 break;
 489         default:
 490                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 491                 return(0);
 492                 }
 493
 494         sk_PKCS7_RECIP_INFO_push(sk,ri);
 495         return(1);
 496         }
 497
 498 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 499         {
 500         if (!ASN1_INTEGER_set(p7i->version,0))
 501                 return 0;
 502         if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 503                 X509_get_issuer_name(x509)))
 504                 return 0;
 505
 506         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 507         if (!(p7i->issuer_and_serial->serial=
 508                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 509                 return 0;
 510
 511         X509_ALGOR_free(p7i->key_enc_algor);
 512         if (!(p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor)))
 513                 return 0;
 514
 515         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 516         p7i->cert=x509;
 517
 518         return(1);
 519         }
 520
 521 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 522         {
 523         if (PKCS7_type_is_signed(p7))
 524                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 525                         si->issuer_and_serial->issuer,
 526                         si->issuer_and_serial->serial));
 527         else
 528                 return(NULL);
 529         }
 530
 531 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 532         {
 533         int i;
 534         ASN1_OBJECT *objtmp;
 535         PKCS7_ENC_CONTENT *ec;
 536
 537         i=OBJ_obj2nid(p7->type);
 538         switch (i)
 539                 {
 540         case NID_pkcs7_signedAndEnveloped:
 541                 ec=p7->d.signed_and_enveloped->enc_data;
 542                 break;
 543         case NID_pkcs7_enveloped:
 544                 ec=p7->d.enveloped->enc_data;
 545                 break;
 546         default:
 547                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 548                 return(0);
 549                 }
 550
 551         /* Check cipher OID exists and has data in it*/
 552         i = EVP_CIPHER_type(cipher);
 553         if(i == NID_undef) {
 554                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 555                 return(0);
 556         }
 557         objtmp = OBJ_nid2obj(i);
 558
 559         ec->cipher = cipher;
 560         return 1;
 561         }
 562