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         case NID_pkcs7_data:
 142         case NID_pkcs7_enveloped:
 143         case NID_pkcs7_signedAndEnveloped:
 144         case NID_pkcs7_encrypted:
 145         default:
 146                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 147                 goto err;
 148                 }
 149         return(1);
 150 err:
 151         return(0);
 152         }
 153
 154 int PKCS7_set_type(PKCS7 *p7, int type)
 155         {
 156         ASN1_OBJECT *obj;
 157
 158         /*PKCS7_content_free(p7);*/
 159         obj=OBJ_nid2obj(type); /* will not fail */
 160
 161         switch (type)
 162                 {
 163         case NID_pkcs7_signed:
 164                 p7->type=obj;
 165                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
 166                         goto err;
 167                 ASN1_INTEGER_set(p7->d.sign->version,1);
 168                 break;
 169         case NID_pkcs7_data:
 170                 p7->type=obj;
 171                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
 172                         goto err;
 173                 break;
 174         case NID_pkcs7_signedAndEnveloped:
 175                 p7->type=obj;
 176                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
 177                         == NULL) goto err;
 178                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
 179                 p7->d.signed_and_enveloped->enc_data->content_type
 180                                                 = OBJ_nid2obj(NID_pkcs7_data);
 181                 break;
 182         case NID_pkcs7_enveloped:
 183                 p7->type=obj;
 184                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 185                         == NULL) goto err;
 186                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
 187                 p7->d.enveloped->enc_data->content_type
 188                                                 = OBJ_nid2obj(NID_pkcs7_data);
 189                 break;
 190         case NID_pkcs7_encrypted:
 191                 p7->type=obj;
 192                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
 193                         == NULL) goto err;
 194                 ASN1_INTEGER_set(p7->d.encrypted->version,0);
 195                 p7->d.encrypted->enc_data->content_type
 196                                                 = OBJ_nid2obj(NID_pkcs7_data);
 197                 break;
 198
 199         case NID_pkcs7_digest:
 200                 p7->type=obj;
 201                 if ((p7->d.digest=PKCS7_DIGEST_new())
 202                         == NULL) goto err;
 203                 ASN1_INTEGER_set(p7->d.digest->version,0);
 204                 break;
 205         default:
 206                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 207                 goto err;
 208                 }
 209         return(1);
 210 err:
 211         return(0);
 212         }
 213
 214 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 215         {
 216         int i,j,nid;
 217         X509_ALGOR *alg;
 218         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 219         STACK_OF(X509_ALGOR) *md_sk;
 220
 221         i=OBJ_obj2nid(p7->type);
 222         switch (i)
 223                 {
 224         case NID_pkcs7_signed:
 225                 signer_sk=      p7->d.sign->signer_info;
 226                 md_sk=          p7->d.sign->md_algs;
 227                 break;
 228         case NID_pkcs7_signedAndEnveloped:
 229                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 230                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 231                 break;
 232         default:
 233                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 234                 return(0);
 235                 }
 236
 237         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 238
 239         /* If the digest is not currently listed, add it */
 240         j=0;
 241         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 242                 {
 243                 alg=sk_X509_ALGOR_value(md_sk,i);
 244                 if (OBJ_obj2nid(alg->algorithm) == nid)
 245                         {
 246                         j=1;
 247                         break;
 248                         }
 249                 }
 250         if (!j) /* we need to add another algorithm */
 251                 {
 252                 if(!(alg=X509_ALGOR_new())
 253                         || !(alg->parameter = ASN1_TYPE_new())) {
 254                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
 255                         return(0);
 256                 }
 257                 alg->algorithm=OBJ_nid2obj(nid);
 258                 alg->parameter->type = V_ASN1_NULL;
 259                 sk_X509_ALGOR_push(md_sk,alg);
 260                 }
 261
 262         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
 263         return(1);
 264         }
 265
 266 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 267         {
 268         int i;
 269         STACK_OF(X509) **sk;
 270
 271         i=OBJ_obj2nid(p7->type);
 272         switch (i)
 273                 {
 274         case NID_pkcs7_signed:
 275                 sk= &(p7->d.sign->cert);
 276                 break;
 277         case NID_pkcs7_signedAndEnveloped:
 278                 sk= &(p7->d.signed_and_enveloped->cert);
 279                 break;
 280         default:
 281                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 282                 return(0);
 283                 }
 284
 285         if (*sk == NULL)
 286                 *sk=sk_X509_new_null();
 287         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 288         sk_X509_push(*sk,x509);
 289         return(1);
 290         }
 291
 292 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 293         {
 294         int i;
 295         STACK_OF(X509_CRL) **sk;
 296
 297         i=OBJ_obj2nid(p7->type);
 298         switch (i)
 299                 {
 300         case NID_pkcs7_signed:
 301                 sk= &(p7->d.sign->crl);
 302                 break;
 303         case NID_pkcs7_signedAndEnveloped:
 304                 sk= &(p7->d.signed_and_enveloped->crl);
 305                 break;
 306         default:
 307                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 308                 return(0);
 309                 }
 310
 311         if (*sk == NULL)
 312                 *sk=sk_X509_CRL_new_null();
 313
 314         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 315         sk_X509_CRL_push(*sk,crl);
 316         return(1);
 317         }
 318
 319 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 320              const EVP_MD *dgst)
 321         {
 322         int nid;
 323         char is_dsa;
 324
 325         if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)
 326                 is_dsa = 1;
 327         else
 328                 is_dsa = 0;
 329         /* We now need to add another PKCS7_SIGNER_INFO entry */
 330         ASN1_INTEGER_set(p7i->version,1);
 331         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 332                 X509_get_issuer_name(x509));
 333
 334         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 335          * things the ugly way. */
 336         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 337         p7i->issuer_and_serial->serial=
 338                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 339
 340         /* lets keep the pkey around for a while */
 341         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 342         p7i->pkey=pkey;
 343
 344         /* Set the algorithms */
 345         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 346         else
 347                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 348
 349         if (p7i->digest_alg->parameter != NULL)
 350                 ASN1_TYPE_free(p7i->digest_alg->parameter);
 351         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
 352                 goto err;
 353         p7i->digest_alg->parameter->type=V_ASN1_NULL;
 354
 355         if (p7i->digest_enc_alg->parameter != NULL)
 356                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 357         nid = EVP_PKEY_type(pkey->type);
 358         if (nid == EVP_PKEY_RSA)
 359                 {
 360                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_rsaEncryption);
 361                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 362                         goto err;
 363                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 364                 }
 365         else if (nid == EVP_PKEY_DSA)
 366                 {
 367 #if 1
 368                 /* use 'dsaEncryption' OID for compatibility with other software
 369                  * (PKCS #7 v1.5 does specify how to handle DSA) ... */
 370                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsa);
 371 #else
 372                 /* ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for CMS)
 373                  * would make more sense. */
 374                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsaWithSHA1);
 375 #endif
 376                 p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit 'parameter'! */
 377                 }
 378         else if (nid == EVP_PKEY_EC)
 379                 {
 380                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_ecdsa_with_SHA1);
 381                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 382                         goto err;
 383                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 384                 }
 385         else
 386                 return(0);
 387
 388         return(1);
 389 err:
 390         return(0);
 391         }
 392
 393 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 394              const EVP_MD *dgst)
 395         {
 396         PKCS7_SIGNER_INFO *si;
 397
 398         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 399         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 400         if (!PKCS7_add_signer(p7,si)) goto err;
 401         return(si);
 402 err:
 403         return(NULL);
 404         }
 405
 406 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 407         {
 408         if (PKCS7_type_is_signed(p7))
 409                 {
 410                 return(p7->d.sign->signer_info);
 411                 }
 412         else if (PKCS7_type_is_signedAndEnveloped(p7))
 413                 {
 414                 return(p7->d.signed_and_enveloped->signer_info);
 415                 }
 416         else
 417                 return(NULL);
 418         }
 419
 420 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 421         {
 422         PKCS7_RECIP_INFO *ri;
 423
 424         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 425         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 426         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 427         return(ri);
 428 err:
 429         return(NULL);
 430         }
 431
 432 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 433         {
 434         int i;
 435         STACK_OF(PKCS7_RECIP_INFO) *sk;
 436
 437         i=OBJ_obj2nid(p7->type);
 438         switch (i)
 439                 {
 440         case NID_pkcs7_signedAndEnveloped:
 441                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 442                 break;
 443         case NID_pkcs7_enveloped:
 444                 sk=     p7->d.enveloped->recipientinfo;
 445                 break;
 446         default:
 447                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 448                 return(0);
 449                 }
 450
 451         sk_PKCS7_RECIP_INFO_push(sk,ri);
 452         return(1);
 453         }
 454
 455 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 456         {
 457         ASN1_INTEGER_set(p7i->version,0);
 458         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 459                 X509_get_issuer_name(x509));
 460
 461         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 462         p7i->issuer_and_serial->serial=
 463                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 464
 465         X509_ALGOR_free(p7i->key_enc_algor);
 466         p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor);
 467
 468         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 469         p7i->cert=x509;
 470
 471         return(1);
 472         }
 473
 474 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 475         {
 476         if (PKCS7_type_is_signed(p7))
 477                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 478                         si->issuer_and_serial->issuer,
 479                         si->issuer_and_serial->serial));
 480         else
 481                 return(NULL);
 482         }
 483
 484 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 485         {
 486         int i;
 487         ASN1_OBJECT *objtmp;
 488         PKCS7_ENC_CONTENT *ec;
 489
 490         i=OBJ_obj2nid(p7->type);
 491         switch (i)
 492                 {
 493         case NID_pkcs7_signedAndEnveloped:
 494                 ec=p7->d.signed_and_enveloped->enc_data;
 495                 break;
 496         case NID_pkcs7_enveloped:
 497                 ec=p7->d.enveloped->enc_data;
 498                 break;
 499         default:
 500                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 501                 return(0);
 502                 }
 503
 504         /* Check cipher OID exists and has data in it*/
 505         i = EVP_CIPHER_type(cipher);
 506         if(i == NID_undef) {
 507                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 508                 return(0);
 509         }
 510         objtmp = OBJ_nid2obj(i);
 511
 512         ec->cipher = cipher;
 513         return 1;
 514         }
 515