text: /* pk7_asn.c */
  /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   * project 2000.
   */
  /* ====================================================================
   * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. All advertising materials mentioning features or use of this
   *    software must display the following acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
   *
   * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   *    endorse or promote products derived from this software without
   *    prior written permission. For written permission, please contact
   *    licensing@OpenSSL.org.
   *
   * 5. Products derived from this software may not be called "OpenSSL"
   *    nor may "OpenSSL" appear in their names without prior written
   *    permission of the OpenSSL Project.
   *
   * 6. Redistributions of any form whatsoever must retain the following
   *    acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
   *
   * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   * ====================================================================
   *
   * This product includes cryptographic software written by Eric Young
   * (eay@cryptsoft.com).  This product includes software written by Tim
   * Hudson (tjh@cryptsoft.com).
   *
   */
  
  #include <stdio.h>
  #include "cryptlib.h"
  #include <openssl/asn1t.h>
  #include <openssl/pkcs7.h>
  #include <openssl/x509.h>
  
  /* PKCS#7 ASN1 module */
  
  /* This is the ANY DEFINED BY table for the top level PKCS#7 structure */
  
  ASN1_ADB_TEMPLATE(p7default) = ASN1_EXP_OPT(PKCS7, d.other, ASN1_ANY, 0);
  
  ASN1_ADB(PKCS7) = {
  	ADB_ENTRY(NID_pkcs7_data, ASN1_NDEF_EXP_OPT(PKCS7, d.data, ASN1_OCTET_STRING_NDEF, 0)),
  	ADB_ENTRY(NID_pkcs7_signed, ASN1_NDEF_EXP_OPT(PKCS7, d.sign, PKCS7_SIGNED, 0)),
  	ADB_ENTRY(NID_pkcs7_enveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.enveloped, PKCS7_ENVELOPE, 0)),
  	ADB_ENTRY(NID_pkcs7_signedAndEnveloped, ASN1_NDEF_EXP_OPT(PKCS7, d.signed_and_enveloped, PKCS7_SIGN_ENVELOPE, 0)),
  	ADB_ENTRY(NID_pkcs7_digest, ASN1_NDEF_EXP_OPT(PKCS7, d.digest, PKCS7_DIGEST, 0)),
  	ADB_ENTRY(NID_pkcs7_encrypted, ASN1_NDEF_EXP_OPT(PKCS7, d.encrypted, PKCS7_ENCRYPT, 0))
  } ASN1_ADB_END(PKCS7, 0, type, 0, &p7default_tt, NULL);
  
  /* PKCS#7 streaming support */
  static int pk7_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  							void *exarg)
  {
  	ASN1_STREAM_ARG *sarg = exarg;
  	PKCS7 **pp7 = (PKCS7 **)pval;
  
  	switch(operation)
  		{
  
  		case ASN1_OP_STREAM_PRE:
  		if (PKCS7_stream(&sarg->boundary, *pp7) <= 0)
  			return 0;
  		case ASN1_OP_DETACHED_PRE:
  		sarg->ndef_bio = PKCS7_dataInit(*pp7, sarg->out);
  		if (!sarg->ndef_bio)
  			return 0;
  		break;
  
  		case ASN1_OP_STREAM_POST:
  		case ASN1_OP_DETACHED_POST:
  		if (PKCS7_dataFinal(*pp7, sarg->ndef_bio) <= 0)
  			return 0;
  		break;
  
  		}
  	return 1;
  }
  
  ASN1_NDEF_SEQUENCE_cb(PKCS7, pk7_cb) = {
  	ASN1_SIMPLE(PKCS7, type, ASN1_OBJECT),
  	ASN1_ADB_OBJECT(PKCS7)
  }ASN1_NDEF_SEQUENCE_END_cb(PKCS7, PKCS7)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7)
  IMPLEMENT_ASN1_NDEF_FUNCTION(PKCS7)
  IMPLEMENT_ASN1_DUP_FUNCTION(PKCS7)
  
  ASN1_NDEF_SEQUENCE(PKCS7_SIGNED) = {
  	ASN1_SIMPLE(PKCS7_SIGNED, version, ASN1_INTEGER),
  	ASN1_SET_OF(PKCS7_SIGNED, md_algs, X509_ALGOR),
  	ASN1_SIMPLE(PKCS7_SIGNED, contents, PKCS7),
  	ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNED, cert, X509, 0),
  	ASN1_IMP_SET_OF_OPT(PKCS7_SIGNED, crl, X509_CRL, 1),
  	ASN1_SET_OF(PKCS7_SIGNED, signer_info, PKCS7_SIGNER_INFO)
  } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGNED)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNED)
  
  /* Minor tweak to operation: free up EVP_PKEY */
  static int si_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  							void *exarg)
  {
  	if(operation == ASN1_OP_FREE_POST) {
  		PKCS7_SIGNER_INFO *si = (PKCS7_SIGNER_INFO *)*pval;
  		EVP_PKEY_free(si->pkey);
  	}
  	return 1;
  }
  
  ASN1_SEQUENCE_cb(PKCS7_SIGNER_INFO, si_cb) = {
  	ASN1_SIMPLE(PKCS7_SIGNER_INFO, version, ASN1_INTEGER),
  	ASN1_SIMPLE(PKCS7_SIGNER_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
  	ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_alg, X509_ALGOR),
  	/* NB this should be a SET OF but we use a SEQUENCE OF so the
  	 * original order * is retained when the structure is reencoded.
  	 * Since the attributes are implicitly tagged this will not affect
  	 * the encoding.
  	 */
  	ASN1_IMP_SEQUENCE_OF_OPT(PKCS7_SIGNER_INFO, auth_attr, X509_ATTRIBUTE, 0),
  	ASN1_SIMPLE(PKCS7_SIGNER_INFO, digest_enc_alg, X509_ALGOR),
  	ASN1_SIMPLE(PKCS7_SIGNER_INFO, enc_digest, ASN1_OCTET_STRING),
  	ASN1_IMP_SET_OF_OPT(PKCS7_SIGNER_INFO, unauth_attr, X509_ATTRIBUTE, 1)
  } ASN1_SEQUENCE_END_cb(PKCS7_SIGNER_INFO, PKCS7_SIGNER_INFO)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGNER_INFO)
  
  ASN1_SEQUENCE(PKCS7_ISSUER_AND_SERIAL) = {
  	ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, issuer, X509_NAME),
  	ASN1_SIMPLE(PKCS7_ISSUER_AND_SERIAL, serial, ASN1_INTEGER)
  } ASN1_SEQUENCE_END(PKCS7_ISSUER_AND_SERIAL)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ISSUER_AND_SERIAL)
  
  ASN1_NDEF_SEQUENCE(PKCS7_ENVELOPE) = {
  	ASN1_SIMPLE(PKCS7_ENVELOPE, version, ASN1_INTEGER),
  	ASN1_SET_OF(PKCS7_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
  	ASN1_SIMPLE(PKCS7_ENVELOPE, enc_data, PKCS7_ENC_CONTENT)
  } ASN1_NDEF_SEQUENCE_END(PKCS7_ENVELOPE)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENVELOPE)
  
  /* Minor tweak to operation: free up X509 */
  static int ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  								void *exarg)
  {
  	if(operation == ASN1_OP_FREE_POST) {
  		PKCS7_RECIP_INFO *ri = (PKCS7_RECIP_INFO *)*pval;
  		X509_free(ri->cert);
  	}
  	return 1;
  }
  
  ASN1_SEQUENCE_cb(PKCS7_RECIP_INFO, ri_cb) = {
  	ASN1_SIMPLE(PKCS7_RECIP_INFO, version, ASN1_INTEGER),
  	ASN1_SIMPLE(PKCS7_RECIP_INFO, issuer_and_serial, PKCS7_ISSUER_AND_SERIAL),
  	ASN1_SIMPLE(PKCS7_RECIP_INFO, key_enc_algor, X509_ALGOR),
  	ASN1_SIMPLE(PKCS7_RECIP_INFO, enc_key, ASN1_OCTET_STRING)
  } ASN1_SEQUENCE_END_cb(PKCS7_RECIP_INFO, PKCS7_RECIP_INFO)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_RECIP_INFO)
  
  ASN1_NDEF_SEQUENCE(PKCS7_ENC_CONTENT) = {
  	ASN1_SIMPLE(PKCS7_ENC_CONTENT, content_type, ASN1_OBJECT),
  	ASN1_SIMPLE(PKCS7_ENC_CONTENT, algorithm, X509_ALGOR),
  	ASN1_IMP_OPT(PKCS7_ENC_CONTENT, enc_data, ASN1_OCTET_STRING_NDEF, 0)
  } ASN1_NDEF_SEQUENCE_END(PKCS7_ENC_CONTENT)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENC_CONTENT)
  
  ASN1_NDEF_SEQUENCE(PKCS7_SIGN_ENVELOPE) = {
  	ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, version, ASN1_INTEGER),
  	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, recipientinfo, PKCS7_RECIP_INFO),
  	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, md_algs, X509_ALGOR),
  	ASN1_SIMPLE(PKCS7_SIGN_ENVELOPE, enc_data, PKCS7_ENC_CONTENT),
  	ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, cert, X509, 0),
  	ASN1_IMP_SET_OF_OPT(PKCS7_SIGN_ENVELOPE, crl, X509_CRL, 1),
  	ASN1_SET_OF(PKCS7_SIGN_ENVELOPE, signer_info, PKCS7_SIGNER_INFO)
  } ASN1_NDEF_SEQUENCE_END(PKCS7_SIGN_ENVELOPE)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_SIGN_ENVELOPE)
  
  ASN1_NDEF_SEQUENCE(PKCS7_ENCRYPT) = {
  	ASN1_SIMPLE(PKCS7_ENCRYPT, version, ASN1_INTEGER),
  	ASN1_SIMPLE(PKCS7_ENCRYPT, enc_data, PKCS7_ENC_CONTENT)
  } ASN1_NDEF_SEQUENCE_END(PKCS7_ENCRYPT)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_ENCRYPT)
  
  ASN1_NDEF_SEQUENCE(PKCS7_DIGEST) = {
  	ASN1_SIMPLE(PKCS7_DIGEST, version, ASN1_INTEGER),
  	ASN1_SIMPLE(PKCS7_DIGEST, md, X509_ALGOR),
  	ASN1_SIMPLE(PKCS7_DIGEST, contents, PKCS7),
  	ASN1_SIMPLE(PKCS7_DIGEST, digest, ASN1_OCTET_STRING)
  } ASN1_NDEF_SEQUENCE_END(PKCS7_DIGEST)
  
  IMPLEMENT_ASN1_FUNCTIONS(PKCS7_DIGEST)
  
  /* Specials for authenticated attributes */
  
  /* When signing attributes we want to reorder them to match the sorted
   * encoding.
   */
  
  ASN1_ITEM_TEMPLATE(PKCS7_ATTR_SIGN) = 
  	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_ORDER, 0, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
  ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_SIGN)
  
  /* When verifying attributes we need to use the received order. So 
   * we use SEQUENCE OF and tag it to SET OF
   */
  
  ASN1_ITEM_TEMPLATE(PKCS7_ATTR_VERIFY) = 
  	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_IMPTAG | ASN1_TFLG_UNIVERSAL,
  				V_ASN1_SET, PKCS7_ATTRIBUTES, X509_ATTRIBUTE)
  ASN1_ITEM_TEMPLATE_END(PKCS7_ATTR_VERIFY)
  
  IMPLEMENT_ASN1_PRINT_FUNCTION(PKCS7)
  