]> git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/dsa/dsa_asn1.c
Extend callback function to support print customization.
[thirdparty/openssl.git] / crypto / dsa / dsa_asn1.c
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) 2000-2005 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 */
66 static int sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
67 void *exarg)
68 {
69 if(operation == ASN1_OP_NEW_PRE) {
70 DSA_SIG *sig;
71 sig = OPENSSL_malloc(sizeof(DSA_SIG));
72 sig->r = NULL;
73 sig->s = NULL;
74 *pval = (ASN1_VALUE *)sig;
75 if(sig) return 2;
76 DSAerr(DSA_F_SIG_CB, ERR_R_MALLOC_FAILURE);
77 return 0;
78 }
79 return 1;
80 }
81
82 ASN1_SEQUENCE_cb(DSA_SIG, sig_cb) = {
83 ASN1_SIMPLE(DSA_SIG, r, CBIGNUM),
84 ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)
85 } ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG)
86
87 IMPLEMENT_ASN1_FUNCTIONS_const(DSA_SIG)
88
89 /* Override the default free and new methods */
90 static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
91 void *exarg)
92 {
93 if(operation == ASN1_OP_NEW_PRE) {
94 *pval = (ASN1_VALUE *)DSA_new();
95 if(*pval) return 2;
96 return 0;
97 } else if(operation == ASN1_OP_FREE_PRE) {
98 DSA_free((DSA *)*pval);
99 *pval = NULL;
100 return 2;
101 }
102 return 1;
103 }
104
105 ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = {
106 ASN1_SIMPLE(DSA, version, LONG),
107 ASN1_SIMPLE(DSA, p, BIGNUM),
108 ASN1_SIMPLE(DSA, q, BIGNUM),
109 ASN1_SIMPLE(DSA, g, BIGNUM),
110 ASN1_SIMPLE(DSA, pub_key, BIGNUM),
111 ASN1_SIMPLE(DSA, priv_key, BIGNUM)
112 } ASN1_SEQUENCE_END_cb(DSA, DSAPrivateKey)
113
114 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey)
115
116 ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = {
117 ASN1_SIMPLE(DSA, p, BIGNUM),
118 ASN1_SIMPLE(DSA, q, BIGNUM),
119 ASN1_SIMPLE(DSA, g, BIGNUM),
120 } ASN1_SEQUENCE_END_cb(DSA, DSAparams)
121
122 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams)
123
124 /* DSA public key is a bit trickier... its effectively a CHOICE type
125 * decided by a field called write_params which can either write out
126 * just the public key as an INTEGER or the parameters and public key
127 * in a SEQUENCE
128 */
129
130 ASN1_SEQUENCE(dsa_pub_internal) = {
131 ASN1_SIMPLE(DSA, pub_key, BIGNUM),
132 ASN1_SIMPLE(DSA, p, BIGNUM),
133 ASN1_SIMPLE(DSA, q, BIGNUM),
134 ASN1_SIMPLE(DSA, g, BIGNUM)
135 } ASN1_SEQUENCE_END_name(DSA, dsa_pub_internal)
136
137 ASN1_CHOICE_cb(DSAPublicKey, dsa_cb) = {
138 ASN1_SIMPLE(DSA, pub_key, BIGNUM),
139 ASN1_EX_COMBINE(0, 0, dsa_pub_internal)
140 } ASN1_CHOICE_END_cb(DSA, DSAPublicKey, write_params)
141
142 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPublicKey, DSAPublicKey)