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_content_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=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 /*              p7->d.signed_and_enveloped->enc_data->content_type=
 169                         OBJ_nid2obj(NID_pkcs7_encrypted);*/
 170
 171                 break;
 172         case NID_pkcs7_enveloped:
 173                 p7->type=obj;
 174                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 175                         == NULL) goto err;
 176                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
 177                 break;
 178         case NID_pkcs7_digest:
 179         case NID_pkcs7_encrypted:
 180         default:
 181                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 182                 goto err;
 183                 }
 184         return(1);
 185 err:
 186         return(0);
 187         }
 188
 189 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 190         {
 191         int i,j,nid;
 192         X509_ALGOR *alg;
 193         STACK *signer_sk;
 194         STACK *md_sk;
 195
 196         i=OBJ_obj2nid(p7->type);
 197         switch (i)
 198                 {
 199         case NID_pkcs7_signed:
 200                 signer_sk=      p7->d.sign->signer_info;
 201                 md_sk=          p7->d.sign->md_algs;
 202                 break;
 203         case NID_pkcs7_signedAndEnveloped:
 204                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 205                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 206                 break;
 207         default:
 208                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 209                 return(0);
 210                 }
 211
 212         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 213
 214         /* If the digest is not currently listed, add it */
 215         j=0;
 216         for (i=0; i<sk_num(md_sk); i++)
 217                 {
 218                 alg=(X509_ALGOR *)sk_value(md_sk,i);
 219                 if (OBJ_obj2nid(alg->algorithm) == nid)
 220                         {
 221                         j=1;
 222                         break;
 223                         }
 224                 }
 225         if (!j) /* we need to add another algorithm */
 226                 {
 227                 alg=X509_ALGOR_new();
 228                 alg->algorithm=OBJ_nid2obj(nid);
 229                 sk_push(md_sk,(char *)alg);
 230                 }
 231
 232         sk_push(signer_sk,(char *)psi);
 233         return(1);
 234         }
 235
 236 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 237         {
 238         int i;
 239         STACK_OF(X509) **sk;
 240
 241         i=OBJ_obj2nid(p7->type);
 242         switch (i)
 243                 {
 244         case NID_pkcs7_signed:
 245                 sk= &(p7->d.sign->cert);
 246                 break;
 247         case NID_pkcs7_signedAndEnveloped:
 248                 sk= &(p7->d.signed_and_enveloped->cert);
 249                 break;
 250         default:
 251                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 252                 return(0);
 253                 }
 254
 255         if (*sk == NULL)
 256                 *sk=sk_X509_new_null();
 257         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 258         sk_X509_push(*sk,x509);
 259         return(1);
 260         }
 261
 262 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 263         {
 264         int i;
 265         STACK **sk;
 266
 267         i=OBJ_obj2nid(p7->type);
 268         switch (i)
 269                 {
 270         case NID_pkcs7_signed:
 271                 sk= &(p7->d.sign->crl);
 272                 break;
 273         case NID_pkcs7_signedAndEnveloped:
 274                 sk= &(p7->d.signed_and_enveloped->crl);
 275                 break;
 276         default:
 277                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 278                 return(0);
 279                 }
 280
 281         if (*sk == NULL)
 282                 *sk=sk_new_null();
 283
 284         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 285         sk_push(*sk,(char *)crl);
 286         return(1);
 287         }
 288
 289 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 290              EVP_MD *dgst)
 291         {
 292         /* We now need to add another PKCS7_SIGNER_INFO entry */
 293         ASN1_INTEGER_set(p7i->version,1);
 294         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 295                 X509_get_issuer_name(x509));
 296
 297         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 298          * things the ugly way. */
 299         ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 300         p7i->issuer_and_serial->serial=
 301                 ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 302
 303         /* lets keep the pkey around for a while */
 304         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 305         p7i->pkey=pkey;
 306
 307         /* Set the algorithms */
 308         if (pkey->type == EVP_PKEY_DSA)
 309                 p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 310         else
 311                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 312
 313         if (p7i->digest_alg->parameter != NULL)
 314                 ASN1_TYPE_free(p7i->digest_alg->parameter);
 315         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
 316                 goto err;
 317         p7i->digest_alg->parameter->type=V_ASN1_NULL;
 318
 319         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
 320
 321         if (p7i->digest_enc_alg->parameter != NULL)
 322                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 323         if ((p7i->digest_enc_alg->parameter=ASN1_TYPE_new()) == NULL)
 324                 goto err;
 325         p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 326
 327         return(1);
 328 err:
 329         return(0);
 330         }
 331
 332 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 333              EVP_MD *dgst)
 334         {
 335         PKCS7_SIGNER_INFO *si;
 336
 337         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 338         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 339         if (!PKCS7_add_signer(p7,si)) goto err;
 340         return(si);
 341 err:
 342         return(NULL);
 343         }
 344
 345 STACK *PKCS7_get_signer_info(PKCS7 *p7)
 346         {
 347         if (PKCS7_type_is_signed(p7))
 348                 {
 349                 return(p7->d.sign->signer_info);
 350                 }
 351         else if (PKCS7_type_is_signedAndEnveloped(p7))
 352                 {
 353                 return(p7->d.signed_and_enveloped->signer_info);
 354                 }
 355         else
 356                 return(NULL);
 357         }
 358
 359 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 360         {
 361         PKCS7_RECIP_INFO *ri;
 362
 363         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 364         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 365         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 366         return(ri);
 367 err:
 368         return(NULL);
 369         }
 370
 371 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 372         {
 373         int i;
 374         STACK *sk;
 375
 376         i=OBJ_obj2nid(p7->type);
 377         switch (i)
 378                 {
 379         case NID_pkcs7_signedAndEnveloped:
 380                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 381                 break;
 382         case NID_pkcs7_enveloped:
 383                 sk=     p7->d.enveloped->recipientinfo;
 384                 break;
 385         default:
 386                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 387                 return(0);
 388                 }
 389
 390         sk_push(sk,(char *)ri);
 391         return(1);
 392         }
 393
 394 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 395         {
 396         ASN1_INTEGER_set(p7i->version,0);
 397         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 398                 X509_get_issuer_name(x509));
 399
 400         ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 401         p7i->issuer_and_serial->serial=
 402                 ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 403
 404         X509_ALGOR_free(p7i->key_enc_algor);
 405         p7i->key_enc_algor=(X509_ALGOR *)ASN1_dup(i2d_X509_ALGOR,
 406                 (char *(*)())d2i_X509_ALGOR,
 407                 (char *)x509->cert_info->key->algor);
 408
 409         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 410         p7i->cert=x509;
 411
 412         return(1);
 413         }
 414
 415 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 416         {
 417         if (PKCS7_type_is_signed(p7))
 418                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 419                         si->issuer_and_serial->issuer,
 420                         si->issuer_and_serial->serial));
 421         else
 422                 return(NULL);
 423         }
 424
 425 int PKCS7_set_cipher(PKCS7 *p7, EVP_CIPHER *cipher)
 426         {
 427         int i;
 428         PKCS7_ENC_CONTENT *ec;
 429
 430         i=OBJ_obj2nid(p7->type);
 431         switch (i)
 432                 {
 433         case NID_pkcs7_signedAndEnveloped:
 434                 ec=p7->d.signed_and_enveloped->enc_data;
 435                 break;
 436         case NID_pkcs7_enveloped:
 437                 ec=p7->d.enveloped->enc_data;
 438                 break;
 439         default:
 440                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 441                 return(0);
 442                 }
 443
 444         ec->algorithm->algorithm=OBJ_nid2obj(EVP_CIPHER_type(cipher));
 445         return(ec->algorithm->algorithm != NULL);
 446         }
 447