ASN1_ITEM versions of sign, verify, pack and unpack.

[thirdparty/openssl.git] / crypto / asn1 / a_digest.c

/* crypto/asn1/a_digest.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <time.h>

#include "cryptlib.h"

#ifndef NO_SYS_TYPES_H
# include <sys/types.h>
#endif

#include <openssl/evp.h>
#include <openssl/buffer.h>
#include <openssl/x509.h>

int ASN1_digest(int (*i2d)(), const EVP_MD *type, char *data,
		unsigned char *md, unsigned int *len)
	{
	EVP_MD_CTX ctx;
	int i;
	unsigned char *str,*p;

	i=i2d(data,NULL);
	if ((str=(unsigned char *)OPENSSL_malloc(i)) == NULL) return(0);
	p=str;
	i2d(data,&p);

	EVP_DigestInit(&ctx,type);
	EVP_DigestUpdate(&ctx,str,i);
	EVP_DigestFinal(&ctx,md,len);
	OPENSSL_free(str);
	return(1);
	}


int ASN1_item_digest(const ASN1_ITEM *it, const EVP_MD *type, void *asn,
		unsigned char *md, unsigned int *len)
	{
	EVP_MD_CTX ctx;
	int i;
	unsigned char *str = NULL;

	i=ASN1_item_i2d(asn,&str, it);
	if (!str) return(0);

	EVP_DigestInit(&ctx,type);
	EVP_DigestUpdate(&ctx,str,i);
	EVP_DigestFinal(&ctx,md,len);
	OPENSSL_free(str);
	return(1);
	}