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                 if (!ASN1_INTEGER_set(p7->d.sign->version,1))
 168                         {
 169                         PKCS7_SIGNED_free(p7->d.sign);
 170                         p7->d.sign=NULL;
 171                         goto err;
 172                         }
 173                 break;
 174         case NID_pkcs7_data:
 175                 p7->type=obj;
 176                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
 177                         goto err;
 178                 break;
 179         case NID_pkcs7_signedAndEnveloped:
 180                 p7->type=obj;
 181                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
 182                         == NULL) goto err;
 183                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
 184                 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1))
 185                         goto err;
 186                 break;
 187                 p7->d.signed_and_enveloped->enc_data->content_type
 188                                                 = OBJ_nid2obj(NID_pkcs7_data);
 189                 break;
 190         case NID_pkcs7_enveloped:
 191                 p7->type=obj;
 192                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 193                         == NULL) goto err;
 194                 if (!ASN1_INTEGER_set(p7->d.enveloped->version,0))
 195                         goto err;
 196                 p7->d.enveloped->enc_data->content_type
 197                                                 = OBJ_nid2obj(NID_pkcs7_data);
 198                 break;
 199         case NID_pkcs7_encrypted:
 200                 p7->type=obj;
 201                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
 202                         == NULL) goto err;
 203                 if (!ASN1_INTEGER_set(p7->d.encrypted->version,0))
 204                         goto err;
 205                 p7->d.encrypted->enc_data->content_type
 206                                                 = OBJ_nid2obj(NID_pkcs7_data);
 207                 break;
 208
 209         case NID_pkcs7_digest:
 210         default:
 211                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 212                 goto err;
 213                 }
 214         return(1);
 215 err:
 216         return(0);
 217         }
 218
 219 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 220         {
 221         int i,j,nid;
 222         X509_ALGOR *alg;
 223         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 224         STACK_OF(X509_ALGOR) *md_sk;
 225
 226         i=OBJ_obj2nid(p7->type);
 227         switch (i)
 228                 {
 229         case NID_pkcs7_signed:
 230                 signer_sk=      p7->d.sign->signer_info;
 231                 md_sk=          p7->d.sign->md_algs;
 232                 break;
 233         case NID_pkcs7_signedAndEnveloped:
 234                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 235                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 236                 break;
 237         default:
 238                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 239                 return(0);
 240                 }
 241
 242         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 243
 244         /* If the digest is not currently listed, add it */
 245         j=0;
 246         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 247                 {
 248                 alg=sk_X509_ALGOR_value(md_sk,i);
 249                 if (OBJ_obj2nid(alg->algorithm) == nid)
 250                         {
 251                         j=1;
 252                         break;
 253                         }
 254                 }
 255         if (!j) /* we need to add another algorithm */
 256                 {
 257                 if(!(alg=X509_ALGOR_new())
 258                         || !(alg->parameter = ASN1_TYPE_new())) {
 259                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
 260                         return(0);
 261                 }
 262                 alg->algorithm=OBJ_nid2obj(nid);
 263                 alg->parameter->type = V_ASN1_NULL;
 264                 sk_X509_ALGOR_push(md_sk,alg);
 265                 }
 266
 267         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
 268         return(1);
 269         }
 270
 271 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 272         {
 273         int i;
 274         STACK_OF(X509) **sk;
 275
 276         i=OBJ_obj2nid(p7->type);
 277         switch (i)
 278                 {
 279         case NID_pkcs7_signed:
 280                 sk= &(p7->d.sign->cert);
 281                 break;
 282         case NID_pkcs7_signedAndEnveloped:
 283                 sk= &(p7->d.signed_and_enveloped->cert);
 284                 break;
 285         default:
 286                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 287                 return(0);
 288                 }
 289
 290         if (*sk == NULL)
 291                 *sk=sk_X509_new_null();
 292         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 293         sk_X509_push(*sk,x509);
 294         return(1);
 295         }
 296
 297 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 298         {
 299         int i;
 300         STACK_OF(X509_CRL) **sk;
 301
 302         i=OBJ_obj2nid(p7->type);
 303         switch (i)
 304                 {
 305         case NID_pkcs7_signed:
 306                 sk= &(p7->d.sign->crl);
 307                 break;
 308         case NID_pkcs7_signedAndEnveloped:
 309                 sk= &(p7->d.signed_and_enveloped->crl);
 310                 break;
 311         default:
 312                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 313                 return(0);
 314                 }
 315
 316         if (*sk == NULL)
 317                 *sk=sk_X509_CRL_new_null();
 318
 319         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 320         sk_X509_CRL_push(*sk,crl);
 321         return(1);
 322         }
 323
 324 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 325              const EVP_MD *dgst)
 326         {
 327         char is_dsa;
 328         if (pkey->type == EVP_PKEY_DSA) is_dsa = 1;
 329         else is_dsa = 0;
 330         /* We now need to add another PKCS7_SIGNER_INFO entry */
 331         if (!ASN1_INTEGER_set(p7i->version,1))
 332                 goto err;
 333         if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 334                         X509_get_issuer_name(x509)))
 335                 goto err;
 336
 337         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 338          * things the ugly way. */
 339         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 340         if (!(p7i->issuer_and_serial->serial=
 341                         M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 342                 goto err;
 343
 344         /* lets keep the pkey around for a while */
 345         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 346         p7i->pkey=pkey;
 347
 348         /* Set the algorithms */
 349         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 350         else
 351                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 352
 353         if (p7i->digest_alg->parameter != NULL)
 354                 ASN1_TYPE_free(p7i->digest_alg->parameter);
 355         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
 356                 goto err;
 357         p7i->digest_alg->parameter->type=V_ASN1_NULL;
 358
 359         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
 360
 361         if (p7i->digest_enc_alg->parameter != NULL)
 362                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 363         if(is_dsa) p7i->digest_enc_alg->parameter = NULL;
 364         else {
 365                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 366                         goto err;
 367                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 368         }
 369
 370         return(1);
 371 err:
 372         return(0);
 373         }
 374
 375 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 376              const EVP_MD *dgst)
 377         {
 378         PKCS7_SIGNER_INFO *si;
 379
 380         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 381         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 382         if (!PKCS7_add_signer(p7,si)) goto err;
 383         return(si);
 384 err:
 385         return(NULL);
 386         }
 387
 388 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 389         {
 390         if (PKCS7_type_is_signed(p7))
 391                 {
 392                 return(p7->d.sign->signer_info);
 393                 }
 394         else if (PKCS7_type_is_signedAndEnveloped(p7))
 395                 {
 396                 return(p7->d.signed_and_enveloped->signer_info);
 397                 }
 398         else
 399                 return(NULL);
 400         }
 401
 402 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 403         {
 404         PKCS7_RECIP_INFO *ri;
 405
 406         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 407         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 408         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 409         return(ri);
 410 err:
 411         return(NULL);
 412         }
 413
 414 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 415         {
 416         int i;
 417         STACK_OF(PKCS7_RECIP_INFO) *sk;
 418
 419         i=OBJ_obj2nid(p7->type);
 420         switch (i)
 421                 {
 422         case NID_pkcs7_signedAndEnveloped:
 423                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 424                 break;
 425         case NID_pkcs7_enveloped:
 426                 sk=     p7->d.enveloped->recipientinfo;
 427                 break;
 428         default:
 429                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 430                 return(0);
 431                 }
 432
 433         sk_PKCS7_RECIP_INFO_push(sk,ri);
 434         return(1);
 435         }
 436
 437 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 438         {
 439         if (!ASN1_INTEGER_set(p7i->version,0))
 440                 return 0;
 441         if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 442                 X509_get_issuer_name(x509)))
 443                 return 0;
 444
 445         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 446         if (!(p7i->issuer_and_serial->serial=
 447                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 448                 return 0;
 449
 450         X509_ALGOR_free(p7i->key_enc_algor);
 451         if (!(p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor)))
 452                 return 0;
 453
 454         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 455         p7i->cert=x509;
 456
 457         return(1);
 458         }
 459
 460 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 461         {
 462         if (PKCS7_type_is_signed(p7))
 463                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 464                         si->issuer_and_serial->issuer,
 465                         si->issuer_and_serial->serial));
 466         else
 467                 return(NULL);
 468         }
 469
 470 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 471         {
 472         int i;
 473         ASN1_OBJECT *objtmp;
 474         PKCS7_ENC_CONTENT *ec;
 475
 476         i=OBJ_obj2nid(p7->type);
 477         switch (i)
 478                 {
 479         case NID_pkcs7_signedAndEnveloped:
 480                 ec=p7->d.signed_and_enveloped->enc_data;
 481                 break;
 482         case NID_pkcs7_enveloped:
 483                 ec=p7->d.enveloped->enc_data;
 484                 break;
 485         default:
 486                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 487                 return(0);
 488                 }
 489
 490         /* Check cipher OID exists and has data in it*/
 491         i = EVP_CIPHER_type(cipher);
 492         if(i == NID_undef) {
 493                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 494                 return(0);
 495         }
 496         objtmp = OBJ_nid2obj(i);
 497
 498         ec->cipher = cipher;
 499         return 1;
 500         }
 501