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                 if (p7->d.digest->contents != NULL)
 142                         PKCS7_free(p7->d.digest->contents);
 143                 p7->d.digest->contents=p7_data;
 144                 break;
 145         case NID_pkcs7_data:
 146         case NID_pkcs7_enveloped:
 147         case NID_pkcs7_signedAndEnveloped:
 148         case NID_pkcs7_encrypted:
 149         default:
 150                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 151                 goto err;
 152                 }
 153         return(1);
 154 err:
 155         return(0);
 156         }
 157
 158 int PKCS7_set_type(PKCS7 *p7, int type)
 159         {
 160         ASN1_OBJECT *obj;
 161
 162         /*PKCS7_content_free(p7);*/
 163         obj=OBJ_nid2obj(type); /* will not fail */
 164
 165         switch (type)
 166                 {
 167         case NID_pkcs7_signed:
 168                 p7->type=obj;
 169                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
 170                         goto err;
 171                 ASN1_INTEGER_set(p7->d.sign->version,1);
 172                 break;
 173         case NID_pkcs7_data:
 174                 p7->type=obj;
 175                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
 176                         goto err;
 177                 break;
 178         case NID_pkcs7_signedAndEnveloped:
 179                 p7->type=obj;
 180                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
 181                         == NULL) goto err;
 182                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
 183                 p7->d.signed_and_enveloped->enc_data->content_type
 184                                                 = OBJ_nid2obj(NID_pkcs7_data);
 185                 break;
 186         case NID_pkcs7_enveloped:
 187                 p7->type=obj;
 188                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 189                         == NULL) goto err;
 190                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
 191                 p7->d.enveloped->enc_data->content_type
 192                                                 = OBJ_nid2obj(NID_pkcs7_data);
 193                 break;
 194         case NID_pkcs7_encrypted:
 195                 p7->type=obj;
 196                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
 197                         == NULL) goto err;
 198                 ASN1_INTEGER_set(p7->d.encrypted->version,0);
 199                 p7->d.encrypted->enc_data->content_type
 200                                                 = OBJ_nid2obj(NID_pkcs7_data);
 201                 break;
 202
 203         case NID_pkcs7_digest:
 204                 p7->type=obj;
 205                 if ((p7->d.digest=PKCS7_DIGEST_new())
 206                         == NULL) goto err;
 207                 ASN1_INTEGER_set(p7->d.digest->version,0);
 208                 break;
 209         default:
 210                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 211                 goto err;
 212                 }
 213         return(1);
 214 err:
 215         return(0);
 216         }
 217
 218 int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
 219         {
 220         p7->type = OBJ_nid2obj(type);
 221         p7->d.other = other;
 222         return 1;
 223         }
 224
 225 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 226         {
 227         int i,j,nid;
 228         X509_ALGOR *alg;
 229         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 230         STACK_OF(X509_ALGOR) *md_sk;
 231
 232         i=OBJ_obj2nid(p7->type);
 233         switch (i)
 234                 {
 235         case NID_pkcs7_signed:
 236                 signer_sk=      p7->d.sign->signer_info;
 237                 md_sk=          p7->d.sign->md_algs;
 238                 break;
 239         case NID_pkcs7_signedAndEnveloped:
 240                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 241                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 242                 break;
 243         default:
 244                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 245                 return(0);
 246                 }
 247
 248         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 249
 250         /* If the digest is not currently listed, add it */
 251         j=0;
 252         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 253                 {
 254                 alg=sk_X509_ALGOR_value(md_sk,i);
 255                 if (OBJ_obj2nid(alg->algorithm) == nid)
 256                         {
 257                         j=1;
 258                         break;
 259                         }
 260                 }
 261         if (!j) /* we need to add another algorithm */
 262                 {
 263                 if(!(alg=X509_ALGOR_new())
 264                         || !(alg->parameter = ASN1_TYPE_new())) {
 265                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
 266                         return(0);
 267                 }
 268                 alg->algorithm=OBJ_nid2obj(nid);
 269                 alg->parameter->type = V_ASN1_NULL;
 270                 sk_X509_ALGOR_push(md_sk,alg);
 271                 }
 272
 273         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
 274         return(1);
 275         }
 276
 277 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 278         {
 279         int i;
 280         STACK_OF(X509) **sk;
 281
 282         i=OBJ_obj2nid(p7->type);
 283         switch (i)
 284                 {
 285         case NID_pkcs7_signed:
 286                 sk= &(p7->d.sign->cert);
 287                 break;
 288         case NID_pkcs7_signedAndEnveloped:
 289                 sk= &(p7->d.signed_and_enveloped->cert);
 290                 break;
 291         default:
 292                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 293                 return(0);
 294                 }
 295
 296         if (*sk == NULL)
 297                 *sk=sk_X509_new_null();
 298         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 299         sk_X509_push(*sk,x509);
 300         return(1);
 301         }
 302
 303 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 304         {
 305         int i;
 306         STACK_OF(X509_CRL) **sk;
 307
 308         i=OBJ_obj2nid(p7->type);
 309         switch (i)
 310                 {
 311         case NID_pkcs7_signed:
 312                 sk= &(p7->d.sign->crl);
 313                 break;
 314         case NID_pkcs7_signedAndEnveloped:
 315                 sk= &(p7->d.signed_and_enveloped->crl);
 316                 break;
 317         default:
 318                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 319                 return(0);
 320                 }
 321
 322         if (*sk == NULL)
 323                 *sk=sk_X509_CRL_new_null();
 324
 325         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 326         sk_X509_CRL_push(*sk,crl);
 327         return(1);
 328         }
 329
 330 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 331              const EVP_MD *dgst)
 332         {
 333         int nid;
 334         char is_dsa;
 335
 336         if (pkey->type == EVP_PKEY_DSA || pkey->type == EVP_PKEY_EC)
 337                 is_dsa = 1;
 338         else
 339                 is_dsa = 0;
 340         /* We now need to add another PKCS7_SIGNER_INFO entry */
 341         ASN1_INTEGER_set(p7i->version,1);
 342         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 343                 X509_get_issuer_name(x509));
 344
 345         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 346          * things the ugly way. */
 347         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 348         p7i->issuer_and_serial->serial=
 349                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 350
 351         /* lets keep the pkey around for a while */
 352         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 353         p7i->pkey=pkey;
 354
 355         /* Set the algorithms */
 356         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 357         else
 358                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 359
 360         if (p7i->digest_alg->parameter != NULL)
 361                 ASN1_TYPE_free(p7i->digest_alg->parameter);
 362         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
 363                 goto err;
 364         p7i->digest_alg->parameter->type=V_ASN1_NULL;
 365
 366         if (p7i->digest_enc_alg->parameter != NULL)
 367                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 368         nid = EVP_PKEY_type(pkey->type);
 369         if (nid == EVP_PKEY_RSA)
 370                 {
 371                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_rsaEncryption);
 372                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 373                         goto err;
 374                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 375                 }
 376         else if (nid == EVP_PKEY_DSA)
 377                 {
 378 #if 1
 379                 /* use 'dsaEncryption' OID for compatibility with other software
 380                  * (PKCS #7 v1.5 does specify how to handle DSA) ... */
 381                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsa);
 382 #else
 383                 /* ... although the 'dsaWithSHA1' OID (as required by RFC 2630 for CMS)
 384                  * would make more sense. */
 385                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_dsaWithSHA1);
 386 #endif
 387                 p7i->digest_enc_alg->parameter = NULL; /* special case for DSA: omit 'parameter'! */
 388                 }
 389         else if (nid == EVP_PKEY_EC)
 390                 {
 391                 p7i->digest_enc_alg->algorithm=OBJ_nid2obj(NID_ecdsa_with_SHA1);
 392                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
 393                         goto err;
 394                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 395                 }
 396         else
 397                 return(0);
 398
 399         return(1);
 400 err:
 401         return(0);
 402         }
 403
 404 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 405              const EVP_MD *dgst)
 406         {
 407         PKCS7_SIGNER_INFO *si;
 408
 409         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 410         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 411         if (!PKCS7_add_signer(p7,si)) goto err;
 412         return(si);
 413 err:
 414         return(NULL);
 415         }
 416
 417 int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
 418         {
 419         if (PKCS7_type_is_digest(p7))
 420                 {
 421                 if(!(p7->d.digest->md->parameter = ASN1_TYPE_new()))
 422                         {
 423                         PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,ERR_R_MALLOC_FAILURE);
 424                         return 0;
 425                         }
 426                 p7->d.digest->md->parameter->type = V_ASN1_NULL;
 427                 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
 428                 return 1;
 429                 }
 430
 431         PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,PKCS7_R_WRONG_CONTENT_TYPE);
 432         return 1;
 433         }
 434
 435 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 436         {
 437         if (PKCS7_type_is_signed(p7))
 438                 {
 439                 return(p7->d.sign->signer_info);
 440                 }
 441         else if (PKCS7_type_is_signedAndEnveloped(p7))
 442                 {
 443                 return(p7->d.signed_and_enveloped->signer_info);
 444                 }
 445         else
 446                 return(NULL);
 447         }
 448
 449 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
 450         {
 451         PKCS7_RECIP_INFO *ri;
 452
 453         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 454         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 455         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 456         return(ri);
 457 err:
 458         return(NULL);
 459         }
 460
 461 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
 462         {
 463         int i;
 464         STACK_OF(PKCS7_RECIP_INFO) *sk;
 465
 466         i=OBJ_obj2nid(p7->type);
 467         switch (i)
 468                 {
 469         case NID_pkcs7_signedAndEnveloped:
 470                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 471                 break;
 472         case NID_pkcs7_enveloped:
 473                 sk=     p7->d.enveloped->recipientinfo;
 474                 break;
 475         default:
 476                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 477                 return(0);
 478                 }
 479
 480         sk_PKCS7_RECIP_INFO_push(sk,ri);
 481         return(1);
 482         }
 483
 484 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
 485         {
 486         ASN1_INTEGER_set(p7i->version,0);
 487         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 488                 X509_get_issuer_name(x509));
 489
 490         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 491         p7i->issuer_and_serial->serial=
 492                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 493
 494         X509_ALGOR_free(p7i->key_enc_algor);
 495         p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor);
 496
 497         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 498         p7i->cert=x509;
 499
 500         return(1);
 501         }
 502
 503 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 504         {
 505         if (PKCS7_type_is_signed(p7))
 506                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 507                         si->issuer_and_serial->issuer,
 508                         si->issuer_and_serial->serial));
 509         else
 510                 return(NULL);
 511         }
 512
 513 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 514         {
 515         int i;
 516         ASN1_OBJECT *objtmp;
 517         PKCS7_ENC_CONTENT *ec;
 518
 519         i=OBJ_obj2nid(p7->type);
 520         switch (i)
 521                 {
 522         case NID_pkcs7_signedAndEnveloped:
 523                 ec=p7->d.signed_and_enveloped->enc_data;
 524                 break;
 525         case NID_pkcs7_enveloped:
 526                 ec=p7->d.enveloped->enc_data;
 527                 break;
 528         default:
 529                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 530                 return(0);
 531                 }
 532
 533         /* Check cipher OID exists and has data in it*/
 534         i = EVP_CIPHER_type(cipher);
 535         if(i == NID_undef) {
 536                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 537                 return(0);
 538         }
 539         objtmp = OBJ_nid2obj(i);
 540
 541         ec->cipher = cipher;
 542         return 1;
 543         }
 544