dsa_asn1.c revision 109998 
1286866Sjasone/* dsa_asn1.c */
2286866Sjasone/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3286866Sjasone * project 2000.
4286866Sjasone */
5286866Sjasone/* ====================================================================
6286866Sjasone * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
7286866Sjasone *
8286866Sjasone * Redistribution and use in source and binary forms, with or without
9286866Sjasone * modification, are permitted provided that the following conditions
10286866Sjasone * are met:
11286866Sjasone *
12299587Sjasone * 1. Redistributions of source code must retain the above copyright
13286866Sjasone *    notice, this list of conditions and the following disclaimer.
14286866Sjasone *
15299587Sjasone * 2. Redistributions in binary form must reproduce the above copyright
16286866Sjasone *    notice, this list of conditions and the following disclaimer in
17286866Sjasone *    the documentation and/or other materials provided with the
18286866Sjasone *    distribution.
19299587Sjasone *
20286866Sjasone * 3. All advertising materials mentioning features or use of this
21286866Sjasone *    software must display the following acknowledgment:
22286866Sjasone *    "This product includes software developed by the OpenSSL Project
23286866Sjasone *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24286866Sjasone *
25286866Sjasone * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26286866Sjasone *    endorse or promote products derived from this software without
27286866Sjasone *    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