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