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 #include "asn1_locl.h"
  64
  65 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
  66         {
  67         int nid;
  68         long ret;
  69
  70         nid=OBJ_obj2nid(p7->type);
  71
  72         switch (cmd)
  73                 {
  74         case PKCS7_OP_SET_DETACHED_SIGNATURE:
  75                 if (nid == NID_pkcs7_signed)
  76                         {
  77                         ret=p7->detached=(int)larg;
  78                         if (ret && PKCS7_type_is_data(p7->d.sign->contents))
  79                                         {
  80                                         ASN1_OCTET_STRING *os;
  81                                         os=p7->d.sign->contents->d.data;
  82                                         ASN1_OCTET_STRING_free(os);
  83                                         p7->d.sign->contents->d.data = NULL;
  84                                         }
  85                         }
  86                 else
  87                         {
  88                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
  89                         ret=0;
  90                         }
  91                 break;
  92         case PKCS7_OP_GET_DETACHED_SIGNATURE:
  93                 if (nid == NID_pkcs7_signed)
  94                         {
  95                         if(!p7->d.sign  || !p7->d.sign->contents->d.ptr)
  96                                 ret = 1;
  97                         else ret = 0;
  98
  99                         p7->detached = ret;
 100                         }
 101                 else
 102                         {
 103                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
 104                         ret=0;
 105                         }
 106
 107                 break;
 108         default:
 109                 PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);
 110                 ret=0;
 111                 }
 112         return(ret);
 113         }
 114
 115 int PKCS7_content_new(PKCS7 *p7, int type)
 116         {
 117         PKCS7 *ret=NULL;
 118
 119         if ((ret=PKCS7_new()) == NULL) goto err;
 120         if (!PKCS7_set_type(ret,type)) goto err;
 121         if (!PKCS7_set_content(p7,ret)) goto err;
 122
 123         return(1);
 124 err:
 125         if (ret != NULL) PKCS7_free(ret);
 126         return(0);
 127         }
 128
 129 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
 130         {
 131         int i;
 132
 133         i=OBJ_obj2nid(p7->type);
 134         switch (i)
 135                 {
 136         case NID_pkcs7_signed:
 137                 if (p7->d.sign->contents != NULL)
 138                         PKCS7_free(p7->d.sign->contents);
 139                 p7->d.sign->contents=p7_data;
 140                 break;
 141         case NID_pkcs7_digest:
 142                 if (p7->d.digest->contents != NULL)
 143                         PKCS7_free(p7->d.digest->contents);
 144                 p7->d.digest->contents=p7_data;
 145                 break;
 146         case NID_pkcs7_data:
 147         case NID_pkcs7_enveloped:
 148         case NID_pkcs7_signedAndEnveloped:
 149         case NID_pkcs7_encrypted:
 150         default:
 151                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 152                 goto err;
 153                 }
 154         return(1);
 155 err:
 156         return(0);
 157         }
 158
 159 int PKCS7_set_type(PKCS7 *p7, int type)
 160         {
 161         ASN1_OBJECT *obj;
 162
 163         /*PKCS7_content_free(p7);*/
 164         obj=OBJ_nid2obj(type); /* will not fail */
 165
 166         switch (type)
 167                 {
 168         case NID_pkcs7_signed:
 169                 p7->type=obj;
 170                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
 171                         goto err;
 172                 if (!ASN1_INTEGER_set(p7->d.sign->version,1))
 173                         {
 174                         PKCS7_SIGNED_free(p7->d.sign);
 175                         p7->d.sign=NULL;
 176                         goto err;
 177                         }
 178                 break;
 179         case NID_pkcs7_data:
 180                 p7->type=obj;
 181                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
 182                         goto err;
 183                 break;
 184         case NID_pkcs7_signedAndEnveloped:
 185                 p7->type=obj;
 186                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
 187                         == NULL) goto err;
 188                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
 189                 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1))
 190                         goto err;
 191                 p7->d.signed_and_enveloped->enc_data->content_type
 192                                                 = OBJ_nid2obj(NID_pkcs7_data);
 193                 break;
 194         case NID_pkcs7_enveloped:
 195                 p7->type=obj;
 196                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
 197                         == NULL) goto err;
 198                 if (!ASN1_INTEGER_set(p7->d.enveloped->version,0))
 199                         goto err;
 200                 p7->d.enveloped->enc_data->content_type
 201                                                 = OBJ_nid2obj(NID_pkcs7_data);
 202                 break;
 203         case NID_pkcs7_encrypted:
 204                 p7->type=obj;
 205                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
 206                         == NULL) goto err;
 207                 if (!ASN1_INTEGER_set(p7->d.encrypted->version,0))
 208                         goto err;
 209                 p7->d.encrypted->enc_data->content_type
 210                                                 = OBJ_nid2obj(NID_pkcs7_data);
 211                 break;
 212
 213         case NID_pkcs7_digest:
 214                 p7->type=obj;
 215                 if ((p7->d.digest=PKCS7_DIGEST_new())
 216                         == NULL) goto err;
 217                 if (!ASN1_INTEGER_set(p7->d.digest->version,0))
 218                         goto err;
 219                 break;
 220         default:
 221                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 222                 goto err;
 223                 }
 224         return(1);
 225 err:
 226         return(0);
 227         }
 228
 229 int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
 230         {
 231         p7->type = OBJ_nid2obj(type);
 232         p7->d.other = other;
 233         return 1;
 234         }
 235
 236 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
 237         {
 238         int i,j,nid;
 239         X509_ALGOR *alg;
 240         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
 241         STACK_OF(X509_ALGOR) *md_sk;
 242
 243         i=OBJ_obj2nid(p7->type);
 244         switch (i)
 245                 {
 246         case NID_pkcs7_signed:
 247                 signer_sk=      p7->d.sign->signer_info;
 248                 md_sk=          p7->d.sign->md_algs;
 249                 break;
 250         case NID_pkcs7_signedAndEnveloped:
 251                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 252                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 253                 break;
 254         default:
 255                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 256                 return(0);
 257                 }
 258
 259         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 260
 261         /* If the digest is not currently listed, add it */
 262         j=0;
 263         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
 264                 {
 265                 alg=sk_X509_ALGOR_value(md_sk,i);
 266                 if (OBJ_obj2nid(alg->algorithm) == nid)
 267                         {
 268                         j=1;
 269                         break;
 270                         }
 271                 }
 272         if (!j) /* we need to add another algorithm */
 273                 {
 274                 if(!(alg=X509_ALGOR_new())
 275                         || !(alg->parameter = ASN1_TYPE_new())) {
 276                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
 277                         return(0);
 278                 }
 279                 alg->algorithm=OBJ_nid2obj(nid);
 280                 alg->parameter->type = V_ASN1_NULL;
 281                 sk_X509_ALGOR_push(md_sk,alg);
 282                 }
 283
 284         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
 285         return(1);
 286         }
 287
 288 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
 289         {
 290         int i;
 291         STACK_OF(X509) **sk;
 292
 293         i=OBJ_obj2nid(p7->type);
 294         switch (i)
 295                 {
 296         case NID_pkcs7_signed:
 297                 sk= &(p7->d.sign->cert);
 298                 break;
 299         case NID_pkcs7_signedAndEnveloped:
 300                 sk= &(p7->d.signed_and_enveloped->cert);
 301                 break;
 302         default:
 303                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 304                 return(0);
 305                 }
 306
 307         if (*sk == NULL)
 308                 *sk=sk_X509_new_null();
 309         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 310         sk_X509_push(*sk,x509);
 311         return(1);
 312         }
 313
 314 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
 315         {
 316         int i;
 317         STACK_OF(X509_CRL) **sk;
 318
 319         i=OBJ_obj2nid(p7->type);
 320         switch (i)
 321                 {
 322         case NID_pkcs7_signed:
 323                 sk= &(p7->d.sign->crl);
 324                 break;
 325         case NID_pkcs7_signedAndEnveloped:
 326                 sk= &(p7->d.signed_and_enveloped->crl);
 327                 break;
 328         default:
 329                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 330                 return(0);
 331                 }
 332
 333         if (*sk == NULL)
 334                 *sk=sk_X509_CRL_new_null();
 335
 336         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 337         sk_X509_CRL_push(*sk,crl);
 338         return(1);
 339         }
 340
 341 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
 342              const EVP_MD *dgst)
 343         {
 344         int ret;
 345
 346         /* We now need to add another PKCS7_SIGNER_INFO entry */
 347         if (!ASN1_INTEGER_set(p7i->version,1))
 348                 goto err;
 349         if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 350                         X509_get_issuer_name(x509)))
 351                 goto err;
 352
 353         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 354          * things the ugly way. */
 355         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 356         if (!(p7i->issuer_and_serial->serial=
 357                         M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 358                 goto err;
 359
 360         /* lets keep the pkey around for a while */
 361         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 362         p7i->pkey=pkey;
 363
 364         /* Set the algorithms */
 365
 366         X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_type(dgst)),
 367                                 V_ASN1_NULL, NULL);
 368
 369         if (p7i->digest_enc_alg->parameter != NULL)
 370                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 371         if (pkey->ameth && pkey->ameth->pkey_ctrl)
 372                 {
 373                 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN,
 374                                                 0, p7i);
 375                 if (ret > 0)
 376                         return 1;
 377                 if (ret != -2)
 378                         {
 379                         PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
 380                                         PKCS7_R_SIGNING_CTRL_FAILURE);
 381                         return 0;
 382                         }
 383                 }
 384         PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SET,
 385                         PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
 386         return 0;
 387 err:
 388         return(0);
 389         }
 390
 391 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
 392              const EVP_MD *dgst)
 393         {
 394         PKCS7_SIGNER_INFO *si;
 395
 396         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 397         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 398         if (!PKCS7_add_signer(p7,si)) goto err;
 399         return(si);
 400 err:
 401         if (si)
 402                 PKCS7_SIGNER_INFO_free(si);
 403         return(NULL);
 404         }
 405
 406 int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
 407         {
 408         if (PKCS7_type_is_digest(p7))
 409                 {
 410                 if(!(p7->d.digest->md->parameter = ASN1_TYPE_new()))
 411                         {
 412                         PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,ERR_R_MALLOC_FAILURE);
 413                         return 0;
 414                         }
 415                 p7->d.digest->md->parameter->type = V_ASN1_NULL;
 416                 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
 417                 return 1;
 418                 }
 419
 420         PKCS7err(PKCS7_F_PKCS7_SET_DIGEST,PKCS7_R_WRONG_CONTENT_TYPE);
 421         return 1;
 422         }
 423
 424 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
 425         {
 426         if (PKCS7_type_is_signed(p7))
 427                 {
 428                 return(p7->d.sign->signer_info);
 429                 }
 430         else if (PKCS7_type_is_signedAndEnveloped(p7))
 431                 {
 432                 return(p7->d.signed_and_enveloped->signer_info);
 433                 }
 434         else
 435                 return(NULL);
 436         }
 437
 438 void PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk,
 439                                         X509_ALGOR **pdig, X509_ALGOR **psig)
 440         {
 441         if (pk)
 442                 *pk = si->pkey;
 443         if (pdig)
 444                 *pdig = si->digest_alg;
 445         if (psig)
 446                 *psig = si->digest_enc_alg;
 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         if (!ASN1_INTEGER_set(p7i->version,0))
 487                 return 0;
 488         if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
 489                 X509_get_issuer_name(x509)))
 490                 return 0;
 491
 492         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 493         if (!(p7i->issuer_and_serial->serial=
 494                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509))))
 495                 return 0;
 496
 497         X509_ALGOR_free(p7i->key_enc_algor);
 498         if (!(p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor)))
 499                 return 0;
 500
 501         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 502         p7i->cert=x509;
 503
 504         return(1);
 505         }
 506
 507 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
 508         {
 509         if (PKCS7_type_is_signed(p7))
 510                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 511                         si->issuer_and_serial->issuer,
 512                         si->issuer_and_serial->serial));
 513         else
 514                 return(NULL);
 515         }
 516
 517 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
 518         {
 519         int i;
 520         ASN1_OBJECT *objtmp;
 521         PKCS7_ENC_CONTENT *ec;
 522
 523         i=OBJ_obj2nid(p7->type);
 524         switch (i)
 525                 {
 526         case NID_pkcs7_signedAndEnveloped:
 527                 ec=p7->d.signed_and_enveloped->enc_data;
 528                 break;
 529         case NID_pkcs7_enveloped:
 530                 ec=p7->d.enveloped->enc_data;
 531                 break;
 532         default:
 533                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 534                 return(0);
 535                 }
 536
 537         /* Check cipher OID exists and has data in it*/
 538         i = EVP_CIPHER_type(cipher);
 539         if(i == NID_undef) {
 540                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 541                 return(0);
 542         }
 543         objtmp = OBJ_nid2obj(i);
 544
 545         ec->cipher = cipher;
 546         return 1;
 547         }
 548