crypto/pkcs7/pk7_lib.c

   1 /* crypto/pkcs7/pk7_lib.c */
   2 /* Copyright (C) 1995-1997 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                 abort();
 102                 }
 103         return(ret);
 104         }
 105
 106 int PKCS7_content_new(p7,type)
 107 PKCS7 *p7;
 108 int type;
 109         {
 110         PKCS7 *ret=NULL;
 111
 112         if ((ret=PKCS7_new()) == NULL) goto err;
 113         if (!PKCS7_set_type(ret,type)) goto err;
 114         if (!PKCS7_set_content(p7,ret)) goto err;
 115
 116         return(1);
 117 err:
 118         if (ret != NULL) PKCS7_free(ret);
 119         return(0);
 120         }
 121
 122 int PKCS7_set_content(p7,p7_data)
 123 PKCS7 *p7;
 124 PKCS7 *p7_data;
 125         {
 126         int i;
 127
 128         i=OBJ_obj2nid(p7->type);
 129         switch (i)
 130                 {
 131         case NID_pkcs7_signed:
 132                 if (p7->d.sign->contents != NULL)
 133                         PKCS7_content_free(p7->d.sign->contents);
 134                 p7->d.sign->contents=p7_data;
 135                 break;
 136         case NID_pkcs7_digest:
 137         case NID_pkcs7_data:
 138         case NID_pkcs7_enveloped:
 139         case NID_pkcs7_signedAndEnveloped:
 140         case NID_pkcs7_encrypted:
 141         default:
 142                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 143                 goto err;
 144                 }
 145         return(1);
 146 err:
 147         return(0);
 148         }
 149
 150 int PKCS7_set_type(p7,type)
 151 PKCS7 *p7;
 152 int type;
 153         {
 154         ASN1_OBJECT *obj;
 155
 156         PKCS7_content_free(p7);
 157         obj=OBJ_nid2obj(type); /* will not fail */
 158
 159         switch (type)
 160                 {
 161         case NID_pkcs7_signed:
 162                 p7->type=obj;
 163                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
 164                         goto err;
 165                 ASN1_INTEGER_set(p7->d.sign->version,1);
 166                 break;
 167         case NID_pkcs7_data:
 168                 p7->type=obj;
 169                 if ((p7->d.data=ASN1_OCTET_STRING_new()) == NULL)
 170                         goto err;
 171                 break;
 172         case NID_pkcs7_digest:
 173         case NID_pkcs7_enveloped:
 174         case NID_pkcs7_signedAndEnveloped:
 175         case NID_pkcs7_encrypted:
 176         default:
 177                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
 178                 goto err;
 179                 }
 180         return(1);
 181 err:
 182         return(0);
 183         }
 184
 185 int PKCS7_add_signer(p7,psi)
 186 PKCS7 *p7;
 187 PKCS7_SIGNER_INFO *psi;
 188         {
 189         int i,j,nid;
 190         X509_ALGOR *alg;
 191         PKCS7_SIGNED *p7s;
 192
 193         i=OBJ_obj2nid(p7->type);
 194         if (i != NID_pkcs7_signed)
 195                 {
 196                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 197                 return(0);
 198                 }
 199
 200         p7s=p7->d.sign;
 201
 202         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
 203
 204         /* If the digest is not currently listed, add it */
 205         j=0;
 206         for (i=0; i<sk_num(p7s->md_algs); i++)
 207                 {
 208                 alg=(X509_ALGOR *)sk_value(p7s->md_algs,i);
 209                 if (OBJ_obj2nid(alg->algorithm) == nid)
 210                         {
 211                         j=1;
 212                         break;
 213                         }
 214                 }
 215         if (!j) /* we need to add another algorithm */
 216                 {
 217                 alg=X509_ALGOR_new();
 218                 alg->algorithm=OBJ_nid2obj(nid);
 219                 sk_push(p7s->md_algs,(char *)alg);
 220                 }
 221
 222         sk_push(p7s->signer_info,(char *)psi);
 223         return(1);
 224         }
 225
 226 int PKCS7_add_certificate(p7,x509)
 227 PKCS7 *p7;
 228 X509 *x509;
 229         {
 230         int i;
 231
 232         i=OBJ_obj2nid(p7->type);
 233         if (i != NID_pkcs7_signed)
 234                 {
 235                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 236                 return(0);
 237                 }
 238
 239         if (p7->d.sign->cert == NULL)
 240                 p7->d.sign->cert=sk_new_null();
 241         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
 242         sk_push(p7->d.sign->cert,(char *)x509);
 243         return(1);
 244         }
 245
 246 int PKCS7_add_crl(p7,crl)
 247 PKCS7 *p7;
 248 X509_CRL *crl;
 249         {
 250         int i;
 251         i=OBJ_obj2nid(p7->type);
 252         if (i != NID_pkcs7_signed)
 253                 {
 254                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
 255                 return(0);
 256                 }
 257
 258         if (p7->d.sign->crl == NULL)
 259                 p7->d.sign->crl=sk_new_null();
 260
 261         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
 262         sk_push(p7->d.sign->crl,(char *)crl);
 263         return(1);
 264         }
 265
 266 int PKCS7_SIGNER_INFO_set(p7i,x509,pkey,dgst)
 267 PKCS7_SIGNER_INFO *p7i;
 268 X509 *x509;
 269 EVP_PKEY *pkey;
 270 EVP_MD *dgst;
 271         {
 272         /* We now need to add another PKCS7_SIGNER_INFO entry */
 273         ASN1_INTEGER_set(p7i->version,1);
 274         X509_NAME_set(&p7i->issuer_and_serial->issuer,
 275                 X509_get_issuer_name(x509));
 276
 277         /* because ASN1_INTEGER_set is used to set a 'long' we will do
 278          * things the ugly way. */
 279         ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
 280         p7i->issuer_and_serial->serial=
 281                 ASN1_INTEGER_dup(X509_get_serialNumber(x509));
 282
 283         /* lets keep the pkey around for a while */
 284         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 285         p7i->pkey=pkey;
 286
 287         /* Set the algorithms */
 288         p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
 289         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_MD_pkey_type(dgst));
 290
 291 #if 1
 292         if (p7i->digest_enc_alg->parameter != NULL)
 293                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
 294         if ((p7i->digest_enc_alg->parameter=ASN1_TYPE_new()) == NULL)
 295                 goto err;
 296         p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
 297 #endif
 298
 299
 300         return(1);
 301 err:
 302         return(0);
 303         }
 304
 305 PKCS7_SIGNER_INFO *PKCS7_add_signature(p7,x509,pkey,dgst)
 306 PKCS7 *p7;
 307 X509 *x509;
 308 EVP_PKEY *pkey;
 309 EVP_MD *dgst;
 310         {
 311         PKCS7_SIGNER_INFO *si;
 312
 313         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
 314         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
 315         if (!PKCS7_add_signer(p7,si)) goto err;
 316         return(si);
 317 err:
 318         return(NULL);
 319         }
 320
 321 STACK *PKCS7_get_signer_info(p7)
 322 PKCS7 *p7;
 323         {
 324         if (PKCS7_type_is_signed(p7))
 325                 {
 326                 return(p7->d.sign->signer_info);
 327                 }
 328         else
 329                 return(NULL);
 330         }
 331
 332 X509 *PKCS7_cert_from_signer_info(p7,si)
 333 PKCS7 *p7;
 334 PKCS7_SIGNER_INFO *si;
 335         {
 336         if (PKCS7_type_is_signed(p7))
 337                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
 338                         si->issuer_and_serial->issuer,
 339                         si->issuer_and_serial->serial));
 340         else
 341                 return(NULL);
 342         }
 343