1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
2 * project 2000. */
3 /* ====================================================================
4 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * 3. All advertising materials mentioning features or use of this
19 * software must display the following acknowledgment:
20 * "This product includes software developed by the OpenSSL Project
21 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
22 *
23 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
24 * endorse or promote products derived from this software without
25 * prior written permission. For written permission, please contact
26 * licensing@OpenSSL.org.
27 *
28 * 5. Products derived from this software may not be called "OpenSSL"
29 * nor may "OpenSSL" appear in their names without prior written
30 * permission of the OpenSSL Project.
31 *
32 * 6. Redistributions of any form whatsoever must retain the following
33 * acknowledgment:
34 * "This product includes software developed by the OpenSSL Project
35 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
36 *
37 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
38 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
40 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
43 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
44 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
46 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
47 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
48 * OF THE POSSIBILITY OF SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This product includes cryptographic software written by Eric Young
52 * (eay@cryptsoft.com). This product includes software written by Tim
53 * Hudson (tjh@cryptsoft.com). */
54
55 #include <openssl/dsa.h>
56
57 #include <string.h>
58
59 #include <openssl/asn1.h>
60 #include <openssl/asn1t.h>
61 #include <openssl/err.h>
62 #include <openssl/mem.h>
63
64 #include "internal.h"
65
66
dsa_sig_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)67 static int dsa_sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
68 void *exarg) {
69 if (operation != ASN1_OP_NEW_PRE) {
70 return 1;
71 }
72
73 DSA_SIG *sig;
74 sig = OPENSSL_malloc(sizeof(DSA_SIG));
75 if (!sig) {
76 OPENSSL_PUT_ERROR(DSA, ERR_R_MALLOC_FAILURE);
77 return 0;
78 }
79
80 memset(sig, 0, sizeof(DSA_SIG));
81 *pval = (ASN1_VALUE *)sig;
82 return 2;
83 }
84
85 ASN1_SEQUENCE_cb(DSA_SIG, dsa_sig_cb) = {
86 ASN1_SIMPLE(DSA_SIG, r, CBIGNUM),
87 ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)} ASN1_SEQUENCE_END_cb(DSA_SIG, DSA_SIG);
88
89 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA_SIG, DSA_SIG, DSA_SIG);
90
91
dsa_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)92 static int dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
93 void *exarg) {
94 switch (operation) {
95 case ASN1_OP_NEW_PRE:
96 *pval = (ASN1_VALUE *)DSA_new();
97 if (*pval) {
98 return 2;
99 }
100 return 0;
101
102 case ASN1_OP_FREE_PRE:
103 DSA_free((DSA *)*pval);
104 *pval = NULL;
105 return 2;
106
107 default:
108 return 1;
109 }
110 }
111
112 ASN1_SEQUENCE_cb(DSAPrivateKey, dsa_cb) = {
113 ASN1_SIMPLE(DSA, version, LONG),
114 ASN1_SIMPLE(DSA, p, BIGNUM),
115 ASN1_SIMPLE(DSA, q, BIGNUM),
116 ASN1_SIMPLE(DSA, g, BIGNUM),
117 ASN1_SIMPLE(DSA, pub_key, BIGNUM),
118 ASN1_SIMPLE(DSA, priv_key, BIGNUM)} ASN1_SEQUENCE_END_cb(DSA,
119 DSAPrivateKey);
120
121 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPrivateKey, DSAPrivateKey);
122
123 ASN1_SEQUENCE_cb(DSAparams, dsa_cb) = {
124 ASN1_SIMPLE(DSA, p, BIGNUM), ASN1_SIMPLE(DSA, q, BIGNUM),
125 ASN1_SIMPLE(DSA, g, BIGNUM), } ASN1_SEQUENCE_END_cb(DSA, DSAparams);
126
127 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAparams, DSAparams);
128
129
130 /* DSA public key is a bit trickier... its effectively a CHOICE type decided by
131 * a field called write_params which can either write out just the public key
132 * as an INTEGER or the parameters and public key in a SEQUENCE. */
133
134 ASN1_SEQUENCE(dsa_pub_internal) = {
135 ASN1_SIMPLE(DSA, pub_key, BIGNUM),
136 ASN1_SIMPLE(DSA, p, BIGNUM),
137 ASN1_SIMPLE(DSA, q, BIGNUM),
138 ASN1_SIMPLE(DSA, g, BIGNUM)
139 } ASN1_SEQUENCE_END_name(DSA, dsa_pub_internal);
140
141 ASN1_CHOICE_cb(DSAPublicKey, dsa_cb) = {
142 ASN1_SIMPLE(DSA, pub_key, BIGNUM),
143 ASN1_EX_COMBINE(0, 0, dsa_pub_internal)
144 } ASN1_CHOICE_END_cb(DSA, DSAPublicKey, write_params);
145
146 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(DSA, DSAPublicKey, DSAPublicKey);
147
DSAparams_dup(const DSA * dsa)148 DSA *DSAparams_dup(const DSA *dsa) {
149 return ASN1_item_dup(ASN1_ITEM_rptr(DSAparams), (DSA*) dsa);
150 }
151