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diff --git a/src/lib/libcrypto/dh/dh_lib.c b/src/lib/libcrypto/dh/dh_lib.c
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1/* $OpenBSD: dh_lib.c,v 1.21 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#include <stdio.h>
60
61#include <openssl/opensslconf.h>
62
63#include <openssl/bn.h>
64#include <openssl/dh.h>
65#include <openssl/err.h>
66
67#ifndef OPENSSL_NO_ENGINE
68#include <openssl/engine.h>
69#endif
70
71static const DH_METHOD *default_DH_method = NULL;
72
73void
74DH_set_default_method(const DH_METHOD *meth)
75{
76 default_DH_method = meth;
77}
78
79const DH_METHOD *
80DH_get_default_method(void)
81{
82 if (!default_DH_method)
83 default_DH_method = DH_OpenSSL();
84 return default_DH_method;
85}
86
87int
88DH_set_method(DH *dh, const DH_METHOD *meth)
89{
90 /*
91 * NB: The caller is specifically setting a method, so it's not up to us
92 * to deal with which ENGINE it comes from.
93 */
94 const DH_METHOD *mtmp;
95
96 mtmp = dh->meth;
97 if (mtmp->finish)
98 mtmp->finish(dh);
99#ifndef OPENSSL_NO_ENGINE
100 if (dh->engine) {
101 ENGINE_finish(dh->engine);
102 dh->engine = NULL;
103 }
104#endif
105 dh->meth = meth;
106 if (meth->init)
107 meth->init(dh);
108 return 1;
109}
110
111DH *
112DH_new(void)
113{
114 return DH_new_method(NULL);
115}
116
117DH *
118DH_new_method(ENGINE *engine)
119{
120 DH *ret;
121
122 ret = malloc(sizeof(DH));
123 if (ret == NULL) {
124 DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE);
125 return NULL;
126 }
127
128 ret->meth = DH_get_default_method();
129#ifndef OPENSSL_NO_ENGINE
130 if (engine) {
131 if (!ENGINE_init(engine)) {
132 DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
133 free(ret);
134 return NULL;
135 }
136 ret->engine = engine;
137 } else
138 ret->engine = ENGINE_get_default_DH();
139 if(ret->engine) {
140 ret->meth = ENGINE_get_DH(ret->engine);
141 if (!ret->meth) {
142 DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
143 ENGINE_finish(ret->engine);
144 free(ret);
145 return NULL;
146 }
147 }
148#endif
149
150 ret->pad = 0;
151 ret->version = 0;
152 ret->p = NULL;
153 ret->g = NULL;
154 ret->length = 0;
155 ret->pub_key = NULL;
156 ret->priv_key = NULL;
157 ret->q = NULL;
158 ret->j = NULL;
159 ret->seed = NULL;
160 ret->seedlen = 0;
161 ret->counter = NULL;
162 ret->method_mont_p=NULL;
163 ret->references = 1;
164 ret->flags = ret->meth->flags & ~DH_FLAG_NON_FIPS_ALLOW;
165 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
166 if (ret->meth->init != NULL && !ret->meth->init(ret)) {
167#ifndef OPENSSL_NO_ENGINE
168 if (ret->engine)
169 ENGINE_finish(ret->engine);
170#endif
171 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
172 free(ret);
173 ret = NULL;
174 }
175 return ret;
176}
177
178void
179DH_free(DH *r)
180{
181 int i;
182
183 if (r == NULL)
184 return;
185 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);
186 if (i > 0)
187 return;
188
189 if (r->meth->finish)
190 r->meth->finish(r);
191#ifndef OPENSSL_NO_ENGINE
192 if (r->engine)
193 ENGINE_finish(r->engine);
194#endif
195
196 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
197
198 BN_clear_free(r->p);
199 BN_clear_free(r->g);
200 BN_clear_free(r->q);
201 BN_clear_free(r->j);
202 free(r->seed);
203 BN_clear_free(r->counter);
204 BN_clear_free(r->pub_key);
205 BN_clear_free(r->priv_key);
206 free(r);
207}
208
209int
210DH_up_ref(DH *r)
211{
212 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH);
213
214 return i > 1 ? 1 : 0;
215}
216
217int
218DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
219 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
220{
221 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp, new_func,
222 dup_func, free_func);
223}
224
225int
226DH_set_ex_data(DH *d, int idx, void *arg)
227{
228 return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
229}
230
231void *
232DH_get_ex_data(DH *d, int idx)
233{
234 return CRYPTO_get_ex_data(&d->ex_data, idx);
235}
236
237int
238DH_size(const DH *dh)
239{
240 return BN_num_bytes(dh->p);
241}