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diff --git a/src/lib/libcrypto/dsa/dsa_lib.c b/src/lib/libcrypto/dsa/dsa_lib.c
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1/* crypto/dsa/dsa_lib.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
60
61#include <stdio.h>
62#include "cryptlib.h"
63#include <openssl/bn.h>
64#include <openssl/dsa.h>
65#include <openssl/asn1.h>
66
67const char *DSA_version="DSA" OPENSSL_VERSION_PTEXT;
68
69DSA *DSA_new(void)
70 {
71 DSA *ret;
72
73 ret=(DSA *)Malloc(sizeof(DSA));
74 if (ret == NULL)
75 {
76 DSAerr(DSA_F_DSA_NEW,ERR_R_MALLOC_FAILURE);
77 return(NULL);
78 }
79 ret->pad=0;
80 ret->version=0;
81 ret->write_params=1;
82 ret->p=NULL;
83 ret->q=NULL;
84 ret->g=NULL;
85 ret->flags=DSA_FLAG_CACHE_MONT_P;
86
87 ret->pub_key=NULL;
88 ret->priv_key=NULL;
89
90 ret->kinv=NULL;
91 ret->r=NULL;
92 ret->method_mont_p=NULL;
93
94 ret->references=1;
95 return(ret);
96 }
97
98void DSA_free(DSA *r)
99 {
100 int i;
101
102 if (r == NULL) return;
103
104 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
105#ifdef REF_PRINT
106 REF_PRINT("DSA",r);
107#endif
108 if (i > 0) return;
109#ifdef REF_CHECK
110 if (i < 0)
111 {
112 fprintf(stderr,"DSA_free, bad reference count\n");
113 abort();
114 }
115#endif
116
117 if (r->p != NULL) BN_clear_free(r->p);
118 if (r->q != NULL) BN_clear_free(r->q);
119 if (r->g != NULL) BN_clear_free(r->g);
120 if (r->pub_key != NULL) BN_clear_free(r->pub_key);
121 if (r->priv_key != NULL) BN_clear_free(r->priv_key);
122 if (r->kinv != NULL) BN_clear_free(r->kinv);
123 if (r->r != NULL) BN_clear_free(r->r);
124 if (r->method_mont_p != NULL)
125 BN_MONT_CTX_free((BN_MONT_CTX *)r->method_mont_p);
126 Free(r);
127 }
128
129int DSA_size(DSA *r)
130 {
131 int ret,i;
132 ASN1_INTEGER bs;
133 unsigned char buf[4];
134
135 i=BN_num_bits(r->q);
136 bs.length=(i+7)/8;
137 bs.data=buf;
138 bs.type=V_ASN1_INTEGER;
139 /* If the top bit is set the asn1 encoding is 1 larger. */
140 buf[0]=0xff;
141
142 i=i2d_ASN1_INTEGER(&bs,NULL);
143 i+=i; /* r and s */
144 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
145 return(ret);
146 }
147
148#ifndef NO_DH
149DH *DSA_dup_DH(DSA *r)
150 {
151 /* DSA has p, q, g, optional pub_key, optional priv_key.
152 * DH has p, optional length, g, optional pub_key, optional priv_key.
153 */
154
155 DH *ret = NULL;
156
157 if (r == NULL)
158 goto err;
159 ret = DH_new();
160 if (ret == NULL)
161 goto err;
162 if (r->p != NULL)
163 if ((ret->p = BN_dup(r->p)) == NULL)
164 goto err;
165 if (r->q != NULL)
166 ret->length = BN_num_bits(r->q);
167 if (r->g != NULL)
168 if ((ret->g = BN_dup(r->g)) == NULL)
169 goto err;
170 if (r->pub_key != NULL)
171 if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
172 goto err;
173 if (r->priv_key != NULL)
174 if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
175 goto err;
176
177 return ret;
178
179 err:
180 if (ret != NULL)
181 DH_free(ret);
182 return NULL;
183 }
184#endif
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