crypto/pkcs7/pk7_asn1.c

   1 /* pk7_asn.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/asn1t.h>
  62 #include <openssl/pkcs7.h>
  63
  64 /* PKCS#7 ASN1 module */
  65
  66 /* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
  67
  68 ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
  69
  70 ASN1_ADB(PKCS7) = {
  71         ADB_ENTRY(NID_pkcs7_data, ASN1_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING, 0)),
  72         ADB_ENTRY(NID_pkcs7_signed, ASN1_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
  73         ADB_ENTRY(NID_pkcs7_enveloped, ASN1_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
  74         ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
  75         ADB_ENTRY(NID_pkcs7_digest, ASN1_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
  76         ADB_ENTRY(NID_pkcs7_encrypted, ASN1_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
  77 } ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
  78
  79 ASN1_SEQUENCE(PKCS7) = {
  80         ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
  81         ASN1_ADB_OBJECT(PKCS7)
  82 }ASN1_SEQUENCE_END(PKCS7);
  83
  84 IMPLEMENT_ASN1_FUNCTIONS(PKCS7)
  85
  86 ASN1_SEQUENCE(PKCS7_SIGNED) = {
  87         ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
  88         ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
  89         ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
  90         ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
  91         ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
  92         ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
  93 } ASN1_SEQUENCE_END(PKCS7_SIGNED);
  94
  95 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
  96
  97 /* Minor tweak to operation: free up EVP_PKEY */
  98 static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
  99 {
 100         if(operation == ASN1_OP_FREE_POST) {
 101                 PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
 102                 EVP_PKEY_free(si->pkey);
 103         }
 104         return 1;
 105 }
 106
 107 ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
 108         ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
 109         ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
 110         ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
 111         /* NB this should be a SET OF but we use a SEQUENCE OF so the
 112          * original order * is retained when the structure is reencoded.
 113          * Since the attributes are implicitly tagged this will not affect
 114          * the encoding.
 115          */
 116         ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
 117         ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
 118         ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
 119         ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
 120 } ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO);
 121
 122 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
 123
 124 ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
 125         ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
 126         ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
 127 } ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL);
 128
 129 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
 130
 131 ASN1_SEQUENCE(PKCS7_ENVELOPE) = {
 132         ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
 133         ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
 134         ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
 135 } ASN1_SEQUENCE_END(PKCS7_ENVELOPE);
 136
 137 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
 138
 139 /* Minor tweak to operation: free up X509 */
 140 static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
 141 {
 142         if(operation == ASN1_OP_FREE_POST) {
 143                 PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
 144                 X509_free(ri->cert);
 145         }
 146         return 1;
 147 }
 148
 149 ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
 150         ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
 151         ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
 152         ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
 153         ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
 154 } ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO);
 155
 156 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
 157
 158 ASN1_SEQUENCE(PKCS7_ENC_CONTENT) = {
 159         ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
 160         ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
 161         ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING, 0)
 162 } ASN1_SEQUENCE_END(PKCS7_ENC_CONTENT);
 163
 164 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
 165
 166 ASN1_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
 167         ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
 168         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
 169         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
 170         ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
 171         ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
 172         ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
 173         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
 174 } ASN1_SEQUENCE_END(PKCS7_SIGN_ENVELOPE);
 175
 176 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
 177
 178 ASN1_SEQUENCE(PKCS7_ENCRYPT) = {
 179         ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
 180         ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
 181 } ASN1_SEQUENCE_END(PKCS7_ENCRYPT);
 182
 183 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
 184
 185 ASN1_SEQUENCE(PKCS7_DIGEST) = {
 186         ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
 187         ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
 188         ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
 189         ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
 190 } ASN1_SEQUENCE_END(PKCS7_DIGEST);
 191
 192 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
 193
 194 /* Specials for authenticated attributes */
 195
 196 /* When signing attributes we want to reorder them to match the sorted
 197  * encoding.
 198  */
 199
 200 ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
 201         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
 202 ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN);
 203
 204 /* When verifying attributes we need to use the received order. So
 205  * we use SEQUENCE OF and tag it to SET OF
 206  */
 207
 208 ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
 209         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
 210                                 V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
 211 ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY);