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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/* $OpenBSD: dsa_lib.c,v 1.22 2015/02/11 03:19:37 doug Exp $ */
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
63#include <openssl/opensslconf.h>
64
65#include <openssl/asn1.h>
66#include <openssl/bn.h>
67#include <openssl/dsa.h>
68#include <openssl/err.h>
69
70#ifndef OPENSSL_NO_DH
71#include <openssl/dh.h>
72#endif
73#ifndef OPENSSL_NO_ENGINE
74#include <openssl/engine.h>
75#endif
76
77static const DSA_METHOD *default_DSA_method = NULL;
78
79void
80DSA_set_default_method(const DSA_METHOD *meth)
81{
82 default_DSA_method = meth;
83}
84
85const DSA_METHOD *
86DSA_get_default_method(void)
87{
88 if (!default_DSA_method)
89 default_DSA_method = DSA_OpenSSL();
90 return default_DSA_method;
91}
92
93DSA *
94DSA_new(void)
95{
96 return DSA_new_method(NULL);
97}
98
99int
100DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
101{
102 /*
103 * NB: The caller is specifically setting a method, so it's not up to us
104 * to deal with which ENGINE it comes from.
105 */
106 const DSA_METHOD *mtmp;
107 mtmp = dsa->meth;
108 if (mtmp->finish)
109 mtmp->finish(dsa);
110#ifndef OPENSSL_NO_ENGINE
111 if (dsa->engine) {
112 ENGINE_finish(dsa->engine);
113 dsa->engine = NULL;
114 }
115#endif
116 dsa->meth = meth;
117 if (meth->init)
118 meth->init(dsa);
119 return 1;
120}
121
122DSA *
123DSA_new_method(ENGINE *engine)
124{
125 DSA *ret;
126
127 ret = malloc(sizeof(DSA));
128 if (ret == NULL) {
129 DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
130 return NULL;
131 }
132 ret->meth = DSA_get_default_method();
133#ifndef OPENSSL_NO_ENGINE
134 if (engine) {
135 if (!ENGINE_init(engine)) {
136 DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
137 free(ret);
138 return NULL;
139 }
140 ret->engine = engine;
141 } else
142 ret->engine = ENGINE_get_default_DSA();
143 if (ret->engine) {
144 ret->meth = ENGINE_get_DSA(ret->engine);
145 if (!ret->meth) {
146 DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
147 ENGINE_finish(ret->engine);
148 free(ret);
149 return NULL;
150 }
151 }
152#endif
153
154 ret->pad = 0;
155 ret->version = 0;
156 ret->write_params = 1;
157 ret->p = NULL;
158 ret->q = NULL;
159 ret->g = NULL;
160
161 ret->pub_key = NULL;
162 ret->priv_key = NULL;
163
164 ret->kinv = NULL;
165 ret->r = NULL;
166 ret->method_mont_p = NULL;
167
168 ret->references = 1;
169 ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
170 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
171 if (ret->meth->init != NULL && !ret->meth->init(ret)) {
172#ifndef OPENSSL_NO_ENGINE
173 if (ret->engine)
174 ENGINE_finish(ret->engine);
175#endif
176 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
177 free(ret);
178 ret = NULL;
179 }
180
181 return ret;
182}
183
184void
185DSA_free(DSA *r)
186{
187 int i;
188
189 if (r == NULL)
190 return;
191
192 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DSA);
193 if (i > 0)
194 return;
195
196 if (r->meth->finish)
197 r->meth->finish(r);
198#ifndef OPENSSL_NO_ENGINE
199 if (r->engine)
200 ENGINE_finish(r->engine);
201#endif
202
203 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
204
205 BN_clear_free(r->p);
206 BN_clear_free(r->q);
207 BN_clear_free(r->g);
208 BN_clear_free(r->pub_key);
209 BN_clear_free(r->priv_key);
210 BN_clear_free(r->kinv);
211 BN_clear_free(r->r);
212 free(r);
213}
214
215int
216DSA_up_ref(DSA *r)
217{
218 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA);
219 return i > 1 ? 1 : 0;
220}
221
222int
223DSA_size(const DSA *r)
224{
225 int ret, i;
226 ASN1_INTEGER bs;
227 unsigned char buf[4]; /* 4 bytes looks really small.
228 However, i2d_ASN1_INTEGER() will not look
229 beyond the first byte, as long as the second
230 parameter is NULL. */
231
232 i = BN_num_bits(r->q);
233 bs.length = (i + 7) / 8;
234 bs.data = buf;
235 bs.type = V_ASN1_INTEGER;
236 /* If the top bit is set the asn1 encoding is 1 larger. */
237 buf[0] = 0xff;
238
239 i = i2d_ASN1_INTEGER(&bs, NULL);
240 i += i; /* r and s */
241 ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
242 return ret;
243}
244
245int
246DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
247 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
248{
249 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, argl, argp,
250 new_func, dup_func, free_func);
251}
252
253int
254DSA_set_ex_data(DSA *d, int idx, void *arg)
255{
256 return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
257}
258
259void *
260DSA_get_ex_data(DSA *d, int idx)
261{
262 return CRYPTO_get_ex_data(&d->ex_data, idx);
263}
264
265#ifndef OPENSSL_NO_DH
266DH *
267DSA_dup_DH(const DSA *r)
268{
269 /*
270 * DSA has p, q, g, optional pub_key, optional priv_key.
271 * DH has p, optional length, g, optional pub_key, optional priv_key,
272 * optional q.
273 */
274 DH *ret = NULL;
275
276 if (r == NULL)
277 goto err;
278 ret = DH_new();
279 if (ret == NULL)
280 goto err;
281 if (r->p != NULL)
282 if ((ret->p = BN_dup(r->p)) == NULL)
283 goto err;
284 if (r->q != NULL) {
285 ret->length = BN_num_bits(r->q);
286 if ((ret->q = BN_dup(r->q)) == NULL)
287 goto err;
288 }
289 if (r->g != NULL)
290 if ((ret->g = BN_dup(r->g)) == NULL)
291 goto err;
292 if (r->pub_key != NULL)
293 if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
294 goto err;
295 if (r->priv_key != NULL)
296 if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
297 goto err;
298
299 return ret;
300
301err:
302 DH_free(ret);
303 return NULL;
304}
305#endif
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