crypto/pkcs7/pk7_asn1.c

   1 /* pk7_asn.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2000.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61 #include "internal/cryptlib.h"
  62 #include <openssl/asn1t.h>
  63 #include <openssl/pkcs7.h>
  64 #include <openssl/x509.h>
  65
  66 /* PKCS#7 ASN1 module */
  67
  68 /* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
  69
  70 ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
  71
  72 ASN1_ADB(PKCS7) = {
  73         ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),
  74         ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
  75         ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
  76         ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
  77         ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
  78         ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
  79 } ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
  80
  81 /* PKCS#7 streaming support */
  82 static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  83                   void *exarg)
  84 {
  85     ASN1_STREAM_ARG *sarg = exarg;
  86     PKCS7 **pp7 = (PKCS7 **)pval;
  87
  88     switch (operation) {
  89
  90     case ASN1_OP_STREAM_PRE:
  91         if (PKCS7_stream(&sarg->boundary, *pp7) <= 0)
  92             return 0;
  93     case ASN1_OP_DETACHED_PRE:
  94         sarg->ndef_bio = PKCS7_dataInit(*pp7, sarg->out);
  95         if (!sarg->ndef_bio)
  96             return 0;
  97         break;
  98
  99     case ASN1_OP_STREAM_POST:
 100     case ASN1_OP_DETACHED_POST:
 101         if (PKCS7_dataFinal(*pp7, sarg->ndef_bio) <= 0)
 102             return 0;
 103         break;
 104
 105     }
 106     return 1;
 107 }
 108
 109 ASN1_NDEF_SEQUENCE_cb(PKCS7, pk7_cb) = {
 110         ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
 111         ASN1_ADB_OBJECT(PKCS7)
 112 }ASN1_NDEF_SEQUENCE_END_cb(PKCS7, PKCS7)
 113
 114 IMPLEMENT_ASN1_FUNCTIONS(PKCS7)
 115
 116 IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
 117
 118 IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
 119
 120 ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
 121         ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
 122         ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
 123         ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
 124         ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
 125         ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
 126         ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
 127 } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
 128
 129 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
 130
 131 /* Minor tweak to operation: free up EVP_PKEY */
 132 static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 133                  void *exarg)
 134 {
 135     if (operation == ASN1_OP_FREE_POST) {
 136         PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
 137         EVP_PKEY_free(si->pkey);
 138     }
 139     return 1;
 140 }
 141
 142 ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
 143         ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
 144         ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
 145         ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
 146         /* NB this should be a SET OF but we use a SEQUENCE OF so the
 147          * original order * is retained when the structure is reencoded.
 148          * Since the attributes are implicitly tagged this will not affect
 149          * the encoding.
 150          */
 151         ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
 152         ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
 153         ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
 154         ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
 155 } ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
 156
 157 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
 158
 159 ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
 160         ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
 161         ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
 162 } ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
 163
 164 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
 165
 166 ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
 167         ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
 168         ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
 169         ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
 170 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
 171
 172 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
 173
 174 /* Minor tweak to operation: free up X509 */
 175 static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
 176                  void *exarg)
 177 {
 178     if (operation == ASN1_OP_FREE_POST) {
 179         PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
 180         X509_free(ri->cert);
 181     }
 182     return 1;
 183 }
 184
 185 ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
 186         ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
 187         ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
 188         ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
 189         ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
 190 } ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
 191
 192 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
 193
 194 ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
 195         ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
 196         ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
 197         ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING_NDEF, 0)
 198 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
 199
 200 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
 201
 202 ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
 203         ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
 204         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
 205         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
 206         ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
 207         ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
 208         ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
 209         ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
 210 } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
 211
 212 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
 213
 214 ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
 215         ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
 216         ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
 217 } ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
 218
 219 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
 220
 221 ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
 222         ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
 223         ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
 224         ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
 225         ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
 226 } ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
 227
 228 IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
 229
 230 /* Specials for authenticated attributes */
 231
 232 /*
 233  * When signing attributes we want to reorder them to match the sorted
 234  * encoding.
 235  */
 236
 237 ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) =
 238         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
 239 ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
 240
 241 /*
 242  * When verifying attributes we need to use the received order. So we use
 243  * SEQUENCE OF and tag it to SET OF
 244  */
 245
 246 ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) =
 247         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
 248                                 V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
 249 ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)
 250
 251 IMPLEMENT_ASN1_PRINT_FUNCTION(PKCS7)