/* dsa_asn1.c *//* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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/dsa.h>#include <openssl/asn1.h>#include <openssl/asn1t.h>/* Override the default new methods */static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it){	if(operation == ASN1_OP_NEW_PRE) {		DSA_SIG *sig;		sig = OPENSSL_malloc(sizeof(DSA_SIG));		sig->r = NULL;		sig->s = NULL;		*pval = (ASN1_VALUE *)sig;		if(sig) return 2;		DSAerr(DSA_F_SIG_CB, ERR_R_MALLOC_FAILURE);		return 0;	}	return 1;}ASN1_SEQUENCE_cb(DSA_SIG, sig_cb) = {	ASN1_SIMPLE(DSA_SIG, r, CBIGNUM),	ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)} ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG)IMPLEMENT_ASN1_FUNCTIONS_const(DSA_SIG)/* Override the default free and new methods */static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it){	if(operation == ASN1_OP_NEW_PRE) {		*pval = (ASN1_VALUE *)DSA_new();		if(*pval) return 2;		return 0;	} else if(operation == ASN1_OP_FREE_PRE) {		DSA_free((DSA *)*pval);		*pval = NULL;		return 2;	}	return 1;}ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = {	ASN1_SIMPLE(DSA, version, LONG),	ASN1_SIMPLE(DSA, p, BIGNUM),	ASN1_SIMPLE(DSA, q, BIGNUM),	ASN1_SIMPLE(DSA, g, BIGNUM),	ASN1_SIMPLE(DSA, pub_key, BIGNUM),	ASN1_SIMPLE(DSA, priv_key, BIGNUM)} ASN1_SEQUENCE_END_cb(DSA, DSAPrivateKey)IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey)ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = {	ASN1_SIMPLE(DSA, p, BIGNUM),	ASN1_SIMPLE(DSA, q, BIGNUM),	ASN1_SIMPLE(DSA, g, BIGNUM),} ASN1_SEQUENCE_END_cb(DSA, DSAparams)IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams)/* DSA public key is a bit trickier... its effectively a CHOICE type * decided by a field called write_params which can either write out * just the public key as an INTEGER or the parameters and public key * in a SEQUENCE */ASN1_SEQUENCE(dsa_pub_internal) = {	ASN1_SIMPLE(DSA, pub_key, BIGNUM),	ASN1_SIMPLE(DSA, p, BIGNUM),	ASN1_SIMPLE(DSA, q, BIGNUM),	ASN1_SIMPLE(DSA, g, BIGNUM)} ASN1_SEQUENCE_END_name(DSA, dsa_pub_internal)ASN1_CHOICE_cb(DSAPublicKey, dsa_cb) = {	ASN1_SIMPLE(DSA, pub_key, BIGNUM),	ASN1_EX_COMBINE(0, 0, dsa_pub_internal)} ASN1_CHOICE_END_cb(DSA, DSAPublicKey, write_params)IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPublicKey, DSAPublicKey)