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 "objects.h"
  62 #include "x509.h"
  63
  64 long PKCS7_ctrl(p7,cmd,larg,parg)
  65 PKCS7 *p7;
  66 int cmd;
  67 long larg;
  68 char *parg;
  69         {
  70         int nid;
  71         long ret;
  72
  73         nid=OBJ_obj2nid(p7->type);
  74
  75         switch (cmd)
  76                 {
  77         case PKCS7_OP_SET_DETACHED_SIGNATURE:
  78                 if (nid == NID_pkcs7_signed)
  79                         {
  80                         ret=p7->detached=(int)larg;
  81                         }
  82                 else
  83                         {
  84                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
  85                         ret=0;
  86                         }
  87                 break;
  88         case PKCS7_OP_GET_DETACHED_SIGNATURE:
  89                 if (nid == NID_pkcs7_signed)
  90                         {
  91                         ret=p7->detached;
  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(p7,type)
 108 PKCS7 *p7;
 109 int type;
 110         {
 111         PKCS7 *ret=NULL;
 112
 113         if ((ret=PKCS7_new()) == NULL) goto err;
 114         if (!PKCS7_set_type(ret,type)) goto err;
 115         if (!PKCS7_set_content(p7,ret)) goto err;
 116
 117         return(1);
 118 err:
 119         if (ret != NULL) PKCS7_free(ret);
 120         return(0);
 121         }
 122
 123 int PKCS7_set_content(p7,p7_data)
 124 PKCS7 *p7;
 125 PKCS7 *p7_data;
 126         {
 127         int i;
 128
 129         i=OBJ_obj2nid(p7->type);
 130         switch (i)
 131                 {
 132         case NID_pkcs7_signed:
 133                 if (p7->d.sign->contents != NULL)
 134                         PKCS7_content_free(p7->d.sign->contents);
 135                 p7->d.sign->contents=p7_data;
 136                 break;
 137         case NID_pkcs7_digest:
 138         case NID_pkcs7_data:
 139         case NID_pkcs7_enveloped:
 140         case NID_pkcs7_signedAndEnveloped:
 141         case NID_pkcs7_encrypted:
 142         default:
 143                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 144                 goto err;
 145                 }
 146         return(1);
 147 err:
 148         return(0);
 149         }
 150
 151 int PKCS7_set_type(p7,type)
 152 PKCS7 *p7;
 153 int type;
 154         {
 155         ASN1_OBJECT *obj;
 156
 157         PKCS7_content_free(p7);
 158         obj=OBJ_nid2obj(type); /* will not fail */
 159
 160         switch (type)
 161                 {
 162         case NID_pkcs7_signed:
 163                 p7->type=obj;
 164                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
 165                         goto err;
 166                 ASN1_INTEGER_set(p7->d.sign->version,1);
 167                 break;
 168         case NID_pkcs7_data:
 169                 p7->type=obj;
 170                 if ((p7->d.data=ASN1_OCTET_STRING_new()) == NULL)
 171                         goto err;
 172                 break;
 173         case NID_pkcs7_signedAndEnveloped:
 174                 p7->type=obj;
 175                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
 176                         == NULL) goto err;
 177                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
 178 /*              p7->d.signed_and_enveloped->enc_data->content_type=
 179                         OBJ_nid2obj(NID_pkcs7_encrypted);*/
 180
 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                 break;
 188         case NID_pkcs7_digest:
 189         case NID_pkcs7_encrypted:
 190         default:
 191                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 192                 goto err;
 193                 }
 194         return(1);
 195 err:
 196         return(0);
 197         }
 198
 199 int PKCS7_add_signer(p7,psi)
 200 PKCS7 *p7;
 201 PKCS7_SIGNER_INFO *psi;
 202         {
 203         int i,j,nid;
 204         X509_ALGOR *alg;
 205         STACK *signer_sk;
 206         STACK *md_sk;
 207
 208         i=OBJ_obj2nid(p7->type);
 209         switch (i)
 210                 {
 211         case NID_pkcs7_signed:
 212                 signer_sk=      p7->d.sign->signer_info;
 213                 md_sk=          p7->d.sign->md_algs;
 214                 break;
 215         case NID_pkcs7_signedAndEnveloped:
 216                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
 217                 md_sk=          p7->d.signed_and_enveloped->md_algs;
 218                 break;
 219         default:
 220                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 221                 return(0);
 222                 }
 223
 224         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 225
 226         /* If the digest is not currently listed, add it */
 227         j=0;
 228         for (i=0; i<sk_num(md_sk); i++)
 229                 {
 230                 alg=(X509_ALGOR *)sk_value(md_sk,i);
 231                 if (OBJ_obj2nid(alg->algorithm) == nid)
 232                         {
 233                         j=1;
 234                         break;
 235                         }
 236                 }
 237         if (!j) /* we need to add another algorithm */
 238                 {
 239                 alg=X509_ALGOR_new();
 240                 alg->algorithm=OBJ_nid2obj(nid);
 241                 sk_push(md_sk,(char *)alg);
 242                 }
 243
 244         sk_push(signer_sk,(char *)psi);
 245         return(1);
 246         }
 247
 248 int PKCS7_add_certificate(p7,x509)
 249 PKCS7 *p7;
 250 X509 *x509;
 251         {
 252         int i;
 253         STACK **sk;
 254
 255         i=OBJ_obj2nid(p7->type);
 256         switch (i)
 257                 {
 258         case NID_pkcs7_signed:
 259                 sk= &(p7->d.sign->cert);
 260                 break;
 261         case NID_pkcs7_signedAndEnveloped:
 262                 sk= &(p7->d.signed_and_enveloped->cert);
 263                 break;
 264         default:
 265                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
 266                 return(0);
 267                 }
 268
 269         if (*sk == NULL)
 270                 *sk=sk_new_null();
 271         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 272         sk_push(*sk,(char *)x509);
 273         return(1);
 274         }
 275
 276 int PKCS7_add_crl(p7,crl)
 277 PKCS7 *p7;
 278 X509_CRL *crl;
 279         {
 280         int i;
 281         STACK **sk;
 282
 283         i=OBJ_obj2nid(p7->type);
 284         switch (i)
 285                 {
 286         case NID_pkcs7_signed:
 287                 sk= &(p7->d.sign->crl);
 288                 break;
 289         case NID_pkcs7_signedAndEnveloped:
 290                 sk= &(p7->d.signed_and_enveloped->crl);
 291                 break;
 292         default:
 293                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
 294                 return(0);
 295                 }
 296
 297         if (*sk == NULL)
 298                 *sk=sk_new_null();
 299
 300         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 301         sk_push(*sk,(char *)crl);
 302         return(1);
 303         }
 304
 305 int PKCS7_SIGNER_INFO_set(p7i,x509,pkey,dgst)
 306 PKCS7_SIGNER_INFO *p7i;
 307 X509 *x509;
 308 EVP_PKEY *pkey;
 309 EVP_MD *dgst;
 310         {
 311         /* We now need to add another PKCS7_SIGNER_INFO entry */
 312         ASN1_INTEGER_set(p7i->version,1);
 313         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 314                 X509_get_issuer_name(x509));
 315
 316         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 317          * things the ugly way. */
 318         ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 319         p7i->issuer_and_serial->serial=
 320                 ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 321
 322         /* lets keep the pkey around for a while */
 323         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 324         p7i->pkey=pkey;
 325
 326         /* Set the algorithms */
 327         if (pkey->type == EVP_PKEY_DSA)
 328                 p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
 329         else
 330                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 331         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_MD_pkey_type(dgst));
 332
 333 #if 1
 334         if (p7i->digest_enc_alg->parameter != NULL)
 335                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 336         if ((p7i->digest_enc_alg->parameter=ASN1_TYPE_new()) == NULL)
 337                 goto err;
 338         p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 339 #endif
 340
 341         return(1);
 342 err:
 343         return(0);
 344         }
 345
 346 PKCS7_SIGNER_INFO *PKCS7_add_signature(p7,x509,pkey,dgst)
 347 PKCS7 *p7;
 348 X509 *x509;
 349 EVP_PKEY *pkey;
 350 EVP_MD *dgst;
 351         {
 352         PKCS7_SIGNER_INFO *si;
 353
 354         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 355         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 356         if (!PKCS7_add_signer(p7,si)) goto err;
 357         return(si);
 358 err:
 359         return(NULL);
 360         }
 361
 362 STACK *PKCS7_get_signer_info(p7)
 363 PKCS7 *p7;
 364         {
 365         if (PKCS7_type_is_signed(p7))
 366                 {
 367                 return(p7->d.sign->signer_info);
 368                 }
 369         else if (PKCS7_type_is_signedAndEnveloped(p7))
 370                 {
 371                 return(p7->d.signed_and_enveloped->signer_info);
 372                 }
 373         else
 374                 return(NULL);
 375         }
 376
 377 PKCS7_RECIP_INFO *PKCS7_add_recipient(p7,x509)
 378 PKCS7 *p7;
 379 X509 *x509;
 380         {
 381         PKCS7_RECIP_INFO *ri;
 382
 383         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
 384         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
 385         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
 386         return(ri);
 387 err:
 388         return(NULL);
 389         }
 390
 391 int PKCS7_add_recipient_info(p7,ri)
 392 PKCS7 *p7;
 393 PKCS7_RECIP_INFO *ri;
 394         {
 395         int i;
 396         STACK *sk;
 397
 398         i=OBJ_obj2nid(p7->type);
 399         switch (i)
 400                 {
 401         case NID_pkcs7_signedAndEnveloped:
 402                 sk=     p7->d.signed_and_enveloped->recipientinfo;
 403                 break;
 404         case NID_pkcs7_enveloped:
 405                 sk=     p7->d.enveloped->recipientinfo;
 406                 break;
 407         default:
 408                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
 409                 return(0);
 410                 }
 411
 412         sk_push(sk,(char *)ri);
 413         return(1);
 414         }
 415
 416 int PKCS7_RECIP_INFO_set(p7i,x509)
 417 PKCS7_RECIP_INFO *p7i;
 418 X509 *x509;
 419         {
 420         ASN1_INTEGER_set(p7i->version,0);
 421         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 422                 X509_get_issuer_name(x509));
 423
 424         ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 425         p7i->issuer_and_serial->serial=
 426                 ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 427
 428         X509_ALGOR_free(p7i->key_enc_algor);
 429         p7i->key_enc_algor=(X509_ALGOR *)ASN1_dup(i2d_X509_ALGOR,
 430                 (char *(*)())d2i_X509_ALGOR,
 431                 (char *)x509->cert_info->key->algor);
 432
 433         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 434         p7i->cert=x509;
 435
 436         return(1);
 437         }
 438
 439 X509 *PKCS7_cert_from_signer_info(p7,si)
 440 PKCS7 *p7;
 441 PKCS7_SIGNER_INFO *si;
 442         {
 443         if (PKCS7_type_is_signed(p7))
 444                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 445                         si->issuer_and_serial->issuer,
 446                         si->issuer_and_serial->serial));
 447         else
 448                 return(NULL);
 449         }
 450
 451 int PKCS7_set_cipher(p7,cipher)
 452 PKCS7 *p7;
 453 EVP_CIPHER *cipher;
 454         {
 455         int i;
 456         PKCS7_ENC_CONTENT *ec;
 457
 458         i=OBJ_obj2nid(p7->type);
 459         switch (i)
 460                 {
 461         case NID_pkcs7_signedAndEnveloped:
 462                 ec=p7->d.signed_and_enveloped->enc_data;
 463                 break;
 464         case NID_pkcs7_enveloped:
 465                 ec=p7->d.enveloped->enc_data;
 466                 break;
 467         default:
 468                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
 469                 return(0);
 470                 }
 471
 472         ec->algorithm->algorithm=OBJ_nid2obj(EVP_CIPHER_nid(cipher));
 473         return(ec->algorithm->algorithm != NULL);
 474         }
 475