dsa_asn1.c revision bdfb8ad83da0647e9b9a32792598e8ce7ba3ef4d
1/* dsa_asn1.c */ 2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL 3 * project 2000. 4 */ 5/* ==================================================================== 6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59#include <stdio.h> 60#include "cryptlib.h" 61#include <openssl/dsa.h> 62#include <openssl/asn1.h> 63#include <openssl/asn1t.h> 64 65/* Override the default new methods */ 66static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it) 67{ 68 if(operation == ASN1_OP_NEW_PRE) { 69 DSA_SIG *sig; 70 sig = OPENSSL_malloc(sizeof(DSA_SIG)); 71 sig->r = NULL; 72 sig->s = NULL; 73 *pval = (ASN1_VALUE *)sig; 74 if(sig) return 2; 75 DSAerr(DSA_F_SIG_CB, ERR_R_MALLOC_FAILURE); 76 return 0; 77 } 78 return 1; 79} 80 81ASN1_SEQUENCE_cb(DSA_SIG, sig_cb) = { 82 ASN1_SIMPLE(DSA_SIG, r, CBIGNUM), 83 ASN1_SIMPLE(DSA_SIG, s, CBIGNUM) 84} ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG) 85 86IMPLEMENT_ASN1_FUNCTIONS_const(DSA_SIG) 87 88/* Override the default free and new methods */ 89static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it) 90{ 91 if(operation == ASN1_OP_NEW_PRE) { 92 *pval = (ASN1_VALUE *)DSA_new(); 93 if(*pval) return 2; 94 return 0; 95 } else if(operation == ASN1_OP_FREE_PRE) { 96 DSA_free((DSA *)*pval); 97 *pval = NULL; 98 return 2; 99 } 100 return 1; 101} 102 103ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = { 104 ASN1_SIMPLE(DSA, version, LONG), 105 ASN1_SIMPLE(DSA, p, BIGNUM), 106 ASN1_SIMPLE(DSA, q, BIGNUM), 107 ASN1_SIMPLE(DSA, g, BIGNUM), 108 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 109 ASN1_SIMPLE(DSA, priv_key, BIGNUM) 110} ASN1_SEQUENCE_END_cb(DSA, DSAPrivateKey) 111 112IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey) 113 114ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = { 115 ASN1_SIMPLE(DSA, p, BIGNUM), 116 ASN1_SIMPLE(DSA, q, BIGNUM), 117 ASN1_SIMPLE(DSA, g, BIGNUM), 118} ASN1_SEQUENCE_END_cb(DSA, DSAparams) 119 120IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams) 121 122/* DSA public key is a bit trickier... its effectively a CHOICE type 123 * decided by a field called write_params which can either write out 124 * just the public key as an INTEGER or the parameters and public key 125 * in a SEQUENCE 126 */ 127 128ASN1_SEQUENCE(dsa_pub_internal) = { 129 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 130 ASN1_SIMPLE(DSA, p, BIGNUM), 131 ASN1_SIMPLE(DSA, q, BIGNUM), 132 ASN1_SIMPLE(DSA, g, BIGNUM) 133} ASN1_SEQUENCE_END_name(DSA, dsa_pub_internal) 134 135ASN1_CHOICE_cb(DSAPublicKey, dsa_cb) = { 136 ASN1_SIMPLE(DSA, pub_key, BIGNUM), 137 ASN1_EX_COMBINE(0, 0, dsa_pub_internal) 138} ASN1_CHOICE_END_cb(DSA, DSAPublicKey, write_params) 139 140IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPublicKey, DSAPublicKey) 141