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                         }
  78                 else
  79                         {
  80                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
  81                         ret=0;
  82                         }
  83                 break;
  84         case PKCS7_OP_GET_DETACHED_SIGNATURE:
  85                 if (nid == NID_pkcs7_signed)
  86                         {
  87                         ret=p7->detached;
  88                         }
  89                 else
  90                         {
  91                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
  92                         ret=0;
  93                         }
  94
  95                 break;
  96         default:
  97                 PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);
  98                 ret=0;
  99                 }
 100         return(ret);
 101         }
 102
 103 int PKCS7_content_new(PKCS7 *p7, int type)
 104         {
 105         PKCS7 *ret=NULL;
 106
 107         if ((ret=PKCS7_new()) == NULL) goto err;
 108         if (!PKCS7_set_type(ret,type)) goto err;
 109         if (!PKCS7_set_content(p7,ret)) goto err;
 110
 111         return(1);
 112 err:
 113         if (ret != NULL) PKCS7_free(ret);
 114         return(0);
 115         }
 116
 117 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
 118         {
 119         int i;
 120
 121         i=OBJ_obj2nid(p7->type);
 122         switch (i)
 123                 {
 124         case NID_pkcs7_signed:
 125                 if (p7->d.sign->contents != NULL)
 126                         PKCS7_free(p7->d.sign->contents);
 127                 p7->d.sign->contents=p7_data;
 128                 break;
 129         case NID_pkcs7_digest:
 130         case NID_pkcs7_data:
 131         case NID_pkcs7_enveloped:
 132         case NID_pkcs7_signedAndEnveloped:
 133         case NID_pkcs7_encrypted:
 134         default:
 135                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 136                 goto err;
 137                 }
 138         return(1);
 139 err:
 140         return(0);
 141         }
 142
 143 int PKCS7_set_type(PKCS7 *p7, int type)
 144         {
 145         ASN1_OBJECT *obj;
 146
 147         PKCS7_content_free(p7);
 148         obj=OBJ_nid2obj(type); /* will not fail */
 149
 150         switch (type)
 151                 {
 152         case NID_pkcs7_signed:
 153                 p7->type=obj;
 154                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
 155                         goto err;
 156                 ASN1_INTEGER_set(p7->d.sign->version,1);
 157                 break;
 158         case NID_pkcs7_data:
 159                 p7->type=obj;
 160                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
 161                         goto err;
 162                 break;
 163         case NID_pkcs7_signedAndEnveloped:
 164                 p7->type=obj;
 165                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
 166                         == NULL) goto err;
 167                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
 168                 break;
 169         case NID_pkcs7_enveloped:
 170                 p7->type=obj;
 171                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 172                         == NULL) goto err;
 173                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
 174                 break;
 175         case NID_pkcs7_encrypted:
 176                 p7->type=obj;
 177                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
 178                         == NULL) goto err;
 179                 ASN1_INTEGER_set(p7->d.encrypted->version,0);
 180                 break;
 181
 182         case NID_pkcs7_digest:
 183         default:
 184                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 185                 goto err;
 186                 }
 187         return(1);
 188 err:
 189         return(0);
 190         }
 191
 192 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 193         {
 194         int i,j,nid;
 195         X509_ALGOR *alg;
 196         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 197         STACK_OF(X509_ALGOR) *md_sk;
 198
 199         i=OBJ_obj2nid(p7->type);
 200         switch (i)
 201                 {
 202         case NID_pkcs7_signed:
 203                 signer_sk=      p7->d.sign->signer_info;
 204                 md_sk=          p7->d.sign->md_algs;
 205                 break;
 206         case NID_pkcs7_signedAndEnveloped:
 207                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 208                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 209                 break;
 210         default:
 211                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 212                 return(0);
 213                 }
 214
 215         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 216
 217         /* If the digest is not currently listed, add it */
 218         j=0;
 219         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 220                 {
 221                 alg=sk_X509_ALGOR_value(md_sk,i);
 222                 if (OBJ_obj2nid(alg->algorithm) == nid)
 223                         {
 224                         j=1;
 225                         break;
 226                         }
 227                 }
 228         if (!j) /* we need to add another algorithm */
 229                 {
 230                 if(!(alg=X509_ALGOR_new())
 231                         || !(alg->parameter = ASN1_TYPE_new())) {
 232                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
 233                         return(0);
 234                 }
 235                 alg->algorithm=OBJ_nid2obj(nid);
 236                 alg->parameter->type = V_ASN1_NULL;
 237                 sk_X509_ALGOR_push(md_sk,alg);
 238                 }
 239
 240         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
 241         return(1);
 242         }
 243
 244 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 245         {
 246         int i;
 247         STACK_OF(X509) **sk;
 248
 249         i=OBJ_obj2nid(p7->type);
 250         switch (i)
 251                 {
 252         case NID_pkcs7_signed:
 253                 sk= &(p7->d.sign->cert);
 254                 break;
 255         case NID_pkcs7_signedAndEnveloped:
 256                 sk= &(p7->d.signed_and_enveloped->cert);
 257                 break;
 258         default:
 259                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 260                 return(0);
 261                 }
 262
 263         if (*sk == NULL)
 264                 *sk=sk_X509_new_null();
 265         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 266         sk_X509_push(*sk,x509);
 267         return(1);
 268         }
 269
 270 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 271         {
 272         int i;
 273         STACK_OF(X509_CRL) **sk;
 274
 275         i=OBJ_obj2nid(p7->type);
 276         switch (i)
 277                 {
 278         case NID_pkcs7_signed:
 279                 sk= &(p7->d.sign->crl);
 280                 break;
 281         case NID_pkcs7_signedAndEnveloped:
 282                 sk= &(p7->d.signed_and_enveloped->crl);
 283                 break;
 284         default:
 285                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 286                 return(0);
 287                 }
 288
 289         if (*sk == NULL)
 290                 *sk=sk_X509_CRL_new_null();
 291
 292         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 293         sk_X509_CRL_push(*sk,crl);
 294         return(1);
 295         }
 296
 297 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 298              EVP_MD *dgst)
 299         {
 300         char is_dsa;
 301         if (pkey->type == EVP_PKEY_DSA) is_dsa = 1;
 302         else is_dsa = 0;
 303         /* We now need to add another PKCS7_SIGNER_INFO entry */
 304         ASN1_INTEGER_set(p7i->version,1);
 305         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 306                 X509_get_issuer_name(x509));
 307
 308         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 309          * things the ugly way. */
 310         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 311         p7i->issuer_and_serial->serial=
 312                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 313
 314         /* lets keep the pkey around for a while */
 315         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 316         p7i->pkey=pkey;
 317
 318         /* Set the algorithms */
 319         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 320         else
 321                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 322
 323         if (p7i->digest_alg->parameter != NULL)
 324                 ASN1_TYPE_free(p7i->digest_alg->parameter);
 325         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
 326                 goto err;
 327         p7i->digest_alg->parameter->type=V_ASN1_NULL;
 328
 329         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
 330
 331         if (p7i->digest_enc_alg->parameter != NULL)
 332                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 333         if(is_dsa) p7i->digest_enc_alg->parameter = NULL;
 334         else {
 335                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 336                         goto err;
 337                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 338         }
 339
 340         return(1);
 341 err:
 342         return(0);
 343         }
 344
 345 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 346              EVP_MD *dgst)
 347         {
 348         PKCS7_SIGNER_INFO *si;
 349
 350         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 351         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 352         if (!PKCS7_add_signer(p7,si)) goto err;
 353         return(si);
 354 err:
 355         return(NULL);
 356         }
 357
 358 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 359         {
 360         if (PKCS7_type_is_signed(p7))
 361                 {
 362                 return(p7->d.sign->signer_info);
 363                 }
 364         else if (PKCS7_type_is_signedAndEnveloped(p7))
 365                 {
 366                 return(p7->d.signed_and_enveloped->signer_info);
 367                 }
 368         else
 369                 return(NULL);
 370         }
 371
 372 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 373         {
 374         PKCS7_RECIP_INFO *ri;
 375
 376         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 377         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 378         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 379         return(ri);
 380 err:
 381         return(NULL);
 382         }
 383
 384 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 385         {
 386         int i;
 387         STACK_OF(PKCS7_RECIP_INFO) *sk;
 388
 389         i=OBJ_obj2nid(p7->type);
 390         switch (i)
 391                 {
 392         case NID_pkcs7_signedAndEnveloped:
 393                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 394                 break;
 395         case NID_pkcs7_enveloped:
 396                 sk=     p7->d.enveloped->recipientinfo;
 397                 break;
 398         default:
 399                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 400                 return(0);
 401                 }
 402
 403         sk_PKCS7_RECIP_INFO_push(sk,ri);
 404         return(1);
 405         }
 406
 407 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 408         {
 409         ASN1_INTEGER_set(p7i->version,0);
 410         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 411                 X509_get_issuer_name(x509));
 412
 413         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 414         p7i->issuer_and_serial->serial=
 415                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 416
 417         X509_ALGOR_free(p7i->key_enc_algor);
 418         p7i->key_enc_algor=(X509_ALGOR *)ASN1_dup(i2d_X509_ALGOR,
 419                 (char *(*)())d2i_X509_ALGOR,
 420                 (char *)x509->cert_info->key->algor);
 421
 422         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 423         p7i->cert=x509;
 424
 425         return(1);
 426         }
 427
 428 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 429         {
 430         if (PKCS7_type_is_signed(p7))
 431                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 432                         si->issuer_and_serial->issuer,
 433                         si->issuer_and_serial->serial));
 434         else
 435                 return(NULL);
 436         }
 437
 438 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 439         {
 440         int i;
 441         ASN1_OBJECT *objtmp;
 442         PKCS7_ENC_CONTENT *ec;
 443
 444         i=OBJ_obj2nid(p7->type);
 445         switch (i)
 446                 {
 447         case NID_pkcs7_signedAndEnveloped:
 448                 ec=p7->d.signed_and_enveloped->enc_data;
 449                 break;
 450         case NID_pkcs7_enveloped:
 451                 ec=p7->d.enveloped->enc_data;
 452                 break;
 453         default:
 454                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 455                 return(0);
 456                 }
 457
 458         /* Check cipher OID exists and has data in it*/
 459         i = EVP_CIPHER_type(cipher);
 460         if(i == NID_undef) {
 461                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 462                 return(0);
 463         }
 464         objtmp = OBJ_nid2obj(i);
 465
 466         ec->cipher = cipher;
 467         return 1;
 468         }
 469