crypto/pkcs7/pk7_asn1.c - third_party/openssl - Git at Google

 /*
  * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

 #include <stdio.h>
 #include "internal/cryptlib.h"
 #include <openssl/asn1t.h>
 #include <openssl/pkcs7.h>
 #include <openssl/x509.h>
 #include "pk7_local.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;
         /* fall thru */
     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)

 PKCS7 *d2i_PKCS7(PKCS7 **a, const unsigned char **in, long len)
 {
     PKCS7 *ret;
     OSSL_LIB_CTX *libctx = NULL;
     const char *propq = NULL;

     if (a != NULL && *a != NULL) {
         libctx = (*a)->ctx.libctx;
         propq = (*a)->ctx.propq;
     }

     ret = (PKCS7 *)ASN1_item_d2i_ex((ASN1_VALUE **)a, in, len, (PKCS7_it()),
                                     libctx, propq);
     if (ret != NULL)
         ossl_pkcs7_resolve_libctx(ret);
     return ret;
 }

 int i2d_PKCS7(const PKCS7 *a, unsigned char **out)
 {
     return ASN1_item_i2d((const ASN1_VALUE *)a, out, (PKCS7_it()));\
 }

 PKCS7 *PKCS7_new(void)
 {
     return (PKCS7 *)ASN1_item_new(ASN1_ITEM_rptr(PKCS7));
 }

 PKCS7 *PKCS7_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
 {
     PKCS7 *pkcs7 = (PKCS7 *)ASN1_item_new_ex(ASN1_ITEM_rptr(PKCS7), libctx,
                                              propq);

     if (pkcs7 != NULL) {
         pkcs7->ctx.libctx = libctx;
         pkcs7->ctx.propq = NULL;
         if (propq != NULL) {
             pkcs7->ctx.propq = OPENSSL_strdup(propq);
             if (pkcs7->ctx.propq == NULL) {
                 PKCS7_free(pkcs7);
                 pkcs7 = NULL;
                 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
             }
         }
     }
     return pkcs7;
 }

 void PKCS7_free(PKCS7 *p7)
 {
     if (p7 != NULL) {
         OPENSSL_free(p7->ctx.propq);
         ASN1_item_free((ASN1_VALUE *)p7, ASN1_ITEM_rptr(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)
	/*
	* Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the Apache License 2.0 (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

	#include <stdio.h>
	#include "internal/cryptlib.h"
	#include <openssl/asn1t.h>
	#include <openssl/pkcs7.h>
	#include <openssl/x509.h>
	#include "pk7_local.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;
	/* fall thru */
	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)

	PKCS7 d2i_PKCS7(PKCS7 a, const unsigned char *in, long len)
	{
	PKCS7 *ret;
	OSSL_LIB_CTX *libctx = NULL;
	const char *propq = NULL;

	if (a != NULL && *a != NULL) {
	libctx = (*a)->ctx.libctx;
	propq = (*a)->ctx.propq;
	}

	ret = (PKCS7 )ASN1_item_d2i_ex((ASN1_VALUE *)a, in, len, (PKCS7_it()),
	libctx, propq);
	if (ret != NULL)
	ossl_pkcs7_resolve_libctx(ret);
	return ret;
	}

	int i2d_PKCS7(const PKCS7 a, unsigned char *out)
	{
	return ASN1_item_i2d((const ASN1_VALUE *)a, out, (PKCS7_it()));\
	}

	PKCS7 *PKCS7_new(void)
	{
	return (PKCS7 *)ASN1_item_new(ASN1_ITEM_rptr(PKCS7));
	}

	PKCS7 PKCS7_new_ex(OSSL_LIB_CTX libctx, const char *propq)
	{
	PKCS7 pkcs7 = (PKCS7 )ASN1_item_new_ex(ASN1_ITEM_rptr(PKCS7), libctx,
	propq);

	if (pkcs7 != NULL) {
	pkcs7->ctx.libctx = libctx;
	pkcs7->ctx.propq = NULL;
	if (propq != NULL) {
	pkcs7->ctx.propq = OPENSSL_strdup(propq);
	if (pkcs7->ctx.propq == NULL) {
	PKCS7_free(pkcs7);
	pkcs7 = NULL;
	ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
	}
	}
	}
	return pkcs7;
	}

	void PKCS7_free(PKCS7 *p7)
	{
	if (p7 != NULL) {
	OPENSSL_free(p7->ctx.propq);
	ASN1_item_free((ASN1_VALUE *)p7, ASN1_ITEM_rptr(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)