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                         if(!p7->d.sign  || !p7->d.sign->contents->d.ptr)
  88                                 ret = 1;
  89                         else ret = 0;
  90
  91                         p7->detached = ret;
  92                         }
  93                 else
  94                         {
  95                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
  96                         ret=0;
  97                         }
  98
  99                 break;
 100         default:
 101                 PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);
 102                 ret=0;
 103                 }
 104         return(ret);
 105         }
 106
 107 int PKCS7_content_new(PKCS7 *p7, int type)
 108         {
 109         PKCS7 *ret=NULL;
 110
 111         if ((ret=PKCS7_new()) == NULL) goto err;
 112         if (!PKCS7_set_type(ret,type)) goto err;
 113         if (!PKCS7_set_content(p7,ret)) goto err;
 114
 115         return(1);
 116 err:
 117         if (ret != NULL) PKCS7_free(ret);
 118         return(0);
 119         }
 120
 121 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
 122         {
 123         int i;
 124
 125         i=OBJ_obj2nid(p7->type);
 126         switch (i)
 127                 {
 128         case NID_pkcs7_signed:
 129                 if (p7->d.sign->contents != NULL)
 130                         PKCS7_free(p7->d.sign->contents);
 131                 p7->d.sign->contents=p7_data;
 132                 break;
 133         case NID_pkcs7_digest:
 134         case NID_pkcs7_data:
 135         case NID_pkcs7_enveloped:
 136         case NID_pkcs7_signedAndEnveloped:
 137         case NID_pkcs7_encrypted:
 138         default:
 139                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 140                 goto err;
 141                 }
 142         return(1);
 143 err:
 144         return(0);
 145         }
 146
 147 int PKCS7_set_type(PKCS7 *p7, int type)
 148         {
 149         ASN1_OBJECT *obj;
 150
 151         /*PKCS7_content_free(p7);*/
 152         obj=OBJ_nid2obj(type); /* will not fail */
 153
 154         switch (type)
 155                 {
 156         case NID_pkcs7_signed:
 157                 p7->type=obj;
 158                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
 159                         goto err;
 160                 ASN1_INTEGER_set(p7->d.sign->version,1);
 161                 break;
 162         case NID_pkcs7_data:
 163                 p7->type=obj;
 164                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
 165                         goto err;
 166                 break;
 167         case NID_pkcs7_signedAndEnveloped:
 168                 p7->type=obj;
 169                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
 170                         == NULL) goto err;
 171                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
 172                 p7->d.signed_and_enveloped->enc_data->content_type
 173                                                 = OBJ_nid2obj(NID_pkcs7_data);
 174                 break;
 175         case NID_pkcs7_enveloped:
 176                 p7->type=obj;
 177                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 178                         == NULL) goto err;
 179                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
 180                 p7->d.enveloped->enc_data->content_type
 181                                                 = OBJ_nid2obj(NID_pkcs7_data);
 182                 break;
 183         case NID_pkcs7_encrypted:
 184                 p7->type=obj;
 185                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
 186                         == NULL) goto err;
 187                 ASN1_INTEGER_set(p7->d.encrypted->version,0);
 188                 p7->d.encrypted->enc_data->content_type
 189                                                 = OBJ_nid2obj(NID_pkcs7_data);
 190                 break;
 191
 192         case NID_pkcs7_digest:
 193         default:
 194                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 195                 goto err;
 196                 }
 197         return(1);
 198 err:
 199         return(0);
 200         }
 201
 202 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 203         {
 204         int i,j,nid;
 205         X509_ALGOR *alg;
 206         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 207         STACK_OF(X509_ALGOR) *md_sk;
 208
 209         i=OBJ_obj2nid(p7->type);
 210         switch (i)
 211                 {
 212         case NID_pkcs7_signed:
 213                 signer_sk=      p7->d.sign->signer_info;
 214                 md_sk=          p7->d.sign->md_algs;
 215                 break;
 216         case NID_pkcs7_signedAndEnveloped:
 217                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 218                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 219                 break;
 220         default:
 221                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 222                 return(0);
 223                 }
 224
 225         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 226
 227         /* If the digest is not currently listed, add it */
 228         j=0;
 229         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 230                 {
 231                 alg=sk_X509_ALGOR_value(md_sk,i);
 232                 if (OBJ_obj2nid(alg->algorithm) == nid)
 233                         {
 234                         j=1;
 235                         break;
 236                         }
 237                 }
 238         if (!j) /* we need to add another algorithm */
 239                 {
 240                 if(!(alg=X509_ALGOR_new())
 241                         || !(alg->parameter = ASN1_TYPE_new())) {
 242                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
 243                         return(0);
 244                 }
 245                 alg->algorithm=OBJ_nid2obj(nid);
 246                 alg->parameter->type = V_ASN1_NULL;
 247                 sk_X509_ALGOR_push(md_sk,alg);
 248                 }
 249
 250         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
 251         return(1);
 252         }
 253
 254 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 255         {
 256         int i;
 257         STACK_OF(X509) **sk;
 258
 259         i=OBJ_obj2nid(p7->type);
 260         switch (i)
 261                 {
 262         case NID_pkcs7_signed:
 263                 sk= &(p7->d.sign->cert);
 264                 break;
 265         case NID_pkcs7_signedAndEnveloped:
 266                 sk= &(p7->d.signed_and_enveloped->cert);
 267                 break;
 268         default:
 269                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 270                 return(0);
 271                 }
 272
 273         if (*sk == NULL)
 274                 *sk=sk_X509_new_null();
 275         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 276         sk_X509_push(*sk,x509);
 277         return(1);
 278         }
 279
 280 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 281         {
 282         int i;
 283         STACK_OF(X509_CRL) **sk;
 284
 285         i=OBJ_obj2nid(p7->type);
 286         switch (i)
 287                 {
 288         case NID_pkcs7_signed:
 289                 sk= &(p7->d.sign->crl);
 290                 break;
 291         case NID_pkcs7_signedAndEnveloped:
 292                 sk= &(p7->d.signed_and_enveloped->crl);
 293                 break;
 294         default:
 295                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 296                 return(0);
 297                 }
 298
 299         if (*sk == NULL)
 300                 *sk=sk_X509_CRL_new_null();
 301
 302         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 303         sk_X509_CRL_push(*sk,crl);
 304         return(1);
 305         }
 306
 307 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 308              const EVP_MD *dgst)
 309         {
 310         char is_dsa;
 311         if (pkey->type == EVP_PKEY_DSA) is_dsa = 1;
 312         else is_dsa = 0;
 313         /* We now need to add another PKCS7_SIGNER_INFO entry */
 314         ASN1_INTEGER_set(p7i->version,1);
 315         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 316                 X509_get_issuer_name(x509));
 317
 318         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 319          * things the ugly way. */
 320         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 321         p7i->issuer_and_serial->serial=
 322                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 323
 324         /* lets keep the pkey around for a while */
 325         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 326         p7i->pkey=pkey;
 327
 328         /* Set the algorithms */
 329         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 330         else
 331                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 332
 333         if (p7i->digest_alg->parameter != NULL)
 334                 ASN1_TYPE_free(p7i->digest_alg->parameter);
 335         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
 336                 goto err;
 337         p7i->digest_alg->parameter->type=V_ASN1_NULL;
 338
 339         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
 340
 341         if (p7i->digest_enc_alg->parameter != NULL)
 342                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 343         if(is_dsa) p7i->digest_enc_alg->parameter = NULL;
 344         else {
 345                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 346                         goto err;
 347                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 348         }
 349
 350         return(1);
 351 err:
 352         return(0);
 353         }
 354
 355 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 356              const EVP_MD *dgst)
 357         {
 358         PKCS7_SIGNER_INFO *si;
 359
 360         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 361         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 362         if (!PKCS7_add_signer(p7,si)) goto err;
 363         return(si);
 364 err:
 365         return(NULL);
 366         }
 367
 368 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 369         {
 370         if (PKCS7_type_is_signed(p7))
 371                 {
 372                 return(p7->d.sign->signer_info);
 373                 }
 374         else if (PKCS7_type_is_signedAndEnveloped(p7))
 375                 {
 376                 return(p7->d.signed_and_enveloped->signer_info);
 377                 }
 378         else
 379                 return(NULL);
 380         }
 381
 382 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 383         {
 384         PKCS7_RECIP_INFO *ri;
 385
 386         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 387         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 388         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 389         return(ri);
 390 err:
 391         return(NULL);
 392         }
 393
 394 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 395         {
 396         int i;
 397         STACK_OF(PKCS7_RECIP_INFO) *sk;
 398
 399         i=OBJ_obj2nid(p7->type);
 400         switch (i)
 401                 {
 402         case NID_pkcs7_signedAndEnveloped:
 403                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 404                 break;
 405         case NID_pkcs7_enveloped:
 406                 sk=     p7->d.enveloped->recipientinfo;
 407                 break;
 408         default:
 409                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 410                 return(0);
 411                 }
 412
 413         sk_PKCS7_RECIP_INFO_push(sk,ri);
 414         return(1);
 415         }
 416
 417 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 418         {
 419         ASN1_INTEGER_set(p7i->version,0);
 420         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 421                 X509_get_issuer_name(x509));
 422
 423         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 424         p7i->issuer_and_serial->serial=
 425                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 426
 427         X509_ALGOR_free(p7i->key_enc_algor);
 428         p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor);
 429
 430         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 431         p7i->cert=x509;
 432
 433         return(1);
 434         }
 435
 436 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 437         {
 438         if (PKCS7_type_is_signed(p7))
 439                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 440                         si->issuer_and_serial->issuer,
 441                         si->issuer_and_serial->serial));
 442         else
 443                 return(NULL);
 444         }
 445
 446 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 447         {
 448         int i;
 449         ASN1_OBJECT *objtmp;
 450         PKCS7_ENC_CONTENT *ec;
 451
 452         i=OBJ_obj2nid(p7->type);
 453         switch (i)
 454                 {
 455         case NID_pkcs7_signedAndEnveloped:
 456                 ec=p7->d.signed_and_enveloped->enc_data;
 457                 break;
 458         case NID_pkcs7_enveloped:
 459                 ec=p7->d.enveloped->enc_data;
 460                 break;
 461         default:
 462                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 463                 return(0);
 464                 }
 465
 466         /* Check cipher OID exists and has data in it*/
 467         i = EVP_CIPHER_type(cipher);
 468         if(i == NID_undef) {
 469                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 470                 return(0);
 471         }
 472         objtmp = OBJ_nid2obj(i);
 473
 474         ec->cipher = cipher;
 475         return 1;
 476         }
 477