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 #include <openssl/x509.h>
  64
  65 /* PKCS#7 ASN1 module */
  66
  67 /* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
  68
  69 ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
  70
  71 ASN1_ADB(PKCS7) = {
  72         ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),
  73         ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
  74         ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
  75         ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
  76         ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
  77         ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
  78 } ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
  79
  80 ASN1_NDEF_SEQUENCE(PKCS7) = {
  81         ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
  82         ASN1_ADB_OBJECT(PKCS7)
  83 }ASN1_NDEF_SEQUENCE_END(PKCS7)
  84
  85 IMPLEMENT_ASN1_FUNCTIONS(PKCS7)
  86 IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
  87 IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
  88
  89 ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
  90         ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
  91         ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
  92         ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
  93         ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
  94         ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
  95         ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
  96 } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
  97
  98 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
  99
 100 /* Minor tweak to operation: free up EVP_PKEY */
 101 static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
 102 {
 103         if(operation == ASN1_OP_FREE_POST) {
 104                 PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
 105                 EVP_PKEY_free(si->pkey);
 106         }
 107         return 1;
 108 }
 109
 110 ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
 111         ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
 112         ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
 113         ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
 114         /* NB this should be a SET OF but we use a SEQUENCE OF so the
 115          * original order * is retained when the structure is reencoded.
 116          * Since the attributes are implicitly tagged this will not affect
 117          * the encoding.
 118          */
 119         ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
 120         ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
 121         ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
 122         ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
 123 } ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
 124
 125 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
 126
 127 ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
 128         ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
 129         ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
 130 } ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
 131
 132 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
 133
 134 ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
 135         ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
 136         ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
 137         ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
 138 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
 139
 140 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
 141
 142 /* Minor tweak to operation: free up X509 */
 143 static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
 144 {
 145         if(operation == ASN1_OP_FREE_POST) {
 146                 PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
 147                 X509_free(ri->cert);
 148         }
 149         return 1;
 150 }
 151
 152 ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
 153         ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
 154         ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
 155         ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
 156         ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
 157 } ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
 158
 159 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
 160
 161 ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
 162         ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
 163         ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
 164         ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING, 0)
 165 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
 166
 167 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
 168
 169 ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
 170         ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
 171         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
 172         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
 173         ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
 174         ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
 175         ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
 176         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
 177 } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
 178
 179 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
 180
 181 ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
 182         ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
 183         ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
 184 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
 185
 186 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
 187
 188 ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
 189         ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
 190         ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
 191         ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
 192         ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
 193 } ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
 194
 195 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
 196
 197 /* Specials for authenticated attributes */
 198
 199 /* When signing attributes we want to reorder them to match the sorted
 200  * encoding.
 201  */
 202
 203 ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
 204         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
 205 ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
 206
 207 /* When verifying attributes we need to use the received order. So
 208  * we use SEQUENCE OF and tag it to SET OF
 209  */
 210
 211 ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
 212         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
 213                                 V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
 214 ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)