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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/* crypto/dh/dh_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#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/bn.h>
62#include <openssl/dh.h>
63#include <openssl/engine.h>
64
65const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
66
67static DH_METHOD *default_DH_method;
68static int dh_meth_num = 0;
69static STACK_OF(CRYPTO_EX_DATA_FUNCS) *dh_meth = NULL;
70
71void DH_set_default_openssl_method(DH_METHOD *meth)
72{
73 ENGINE *e;
74 /* We'll need to notify the "openssl" ENGINE of this
75 * change too. We won't bother locking things down at
76 * our end as there was never any locking in these
77 * functions! */
78 if(default_DH_method != meth)
79 {
80 default_DH_method = meth;
81 e = ENGINE_by_id("openssl");
82 if(e)
83 {
84 ENGINE_set_DH(e, meth);
85 ENGINE_free(e);
86 }
87 }
88}
89
90DH_METHOD *DH_get_default_openssl_method(void)
91{
92 if(!default_DH_method) default_DH_method = DH_OpenSSL();
93 return default_DH_method;
94}
95
96#if 0
97DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth)
98{
99 DH_METHOD *mtmp;
100 mtmp = dh->meth;
101 if (mtmp->finish) mtmp->finish(dh);
102 dh->meth = meth;
103 if (meth->init) meth->init(dh);
104 return mtmp;
105}
106#else
107int DH_set_method(DH *dh, ENGINE *engine)
108{
109 ENGINE *mtmp;
110 DH_METHOD *meth;
111 mtmp = dh->engine;
112 meth = ENGINE_get_DH(mtmp);
113 if (!ENGINE_init(engine))
114 return 0;
115 if (meth->finish) meth->finish(dh);
116 dh->engine= engine;
117 meth = ENGINE_get_DH(engine);
118 if (meth->init) meth->init(dh);
119 /* SHOULD ERROR CHECK THIS!!! */
120 ENGINE_finish(mtmp);
121 return 1;
122}
123#endif
124
125DH *DH_new(void)
126{
127 return DH_new_method(NULL);
128}
129
130#if 0
131DH *DH_new_method(DH_METHOD *meth)
132#else
133DH *DH_new_method(ENGINE *engine)
134#endif
135 {
136 DH_METHOD *meth;
137 DH *ret;
138 ret=(DH *)OPENSSL_malloc(sizeof(DH));
139
140 if (ret == NULL)
141 {
142 DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE);
143 return(NULL);
144 }
145 if(engine)
146 ret->engine = engine;
147 else
148 {
149 if((ret->engine=ENGINE_get_default_DH()) == NULL)
150 {
151 OPENSSL_free(ret);
152 return NULL;
153 }
154 }
155 meth = ENGINE_get_DH(ret->engine);
156 ret->pad=0;
157 ret->version=0;
158 ret->p=NULL;
159 ret->g=NULL;
160 ret->length=0;
161 ret->pub_key=NULL;
162 ret->priv_key=NULL;
163 ret->q=NULL;
164 ret->j=NULL;
165 ret->seed = NULL;
166 ret->seedlen = 0;
167 ret->counter = NULL;
168 ret->method_mont_p=NULL;
169 ret->references = 1;
170 ret->flags=meth->flags;
171 CRYPTO_new_ex_data(dh_meth,ret,&ret->ex_data);
172 if ((meth->init != NULL) && !meth->init(ret))
173 {
174 CRYPTO_free_ex_data(dh_meth,ret,&ret->ex_data);
175 OPENSSL_free(ret);
176 ret=NULL;
177 }
178 return(ret);
179 }
180
181void DH_free(DH *r)
182 {
183 DH_METHOD *meth;
184 int i;
185 if(r == NULL) return;
186 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);
187#ifdef REF_PRINT
188 REF_PRINT("DH",r);
189#endif
190 if (i > 0) return;
191#ifdef REF_CHECK
192 if (i < 0)
193 {
194 fprintf(stderr,"DH_free, bad reference count\n");
195 abort();
196 }
197#endif
198
199 meth = ENGINE_get_DH(r->engine);
200 if(meth->finish) meth->finish(r);
201 ENGINE_finish(r->engine);
202
203 CRYPTO_free_ex_data(dh_meth, r, &r->ex_data);
204
205 if (r->p != NULL) BN_clear_free(r->p);
206 if (r->g != NULL) BN_clear_free(r->g);
207 if (r->q != NULL) BN_clear_free(r->q);
208 if (r->j != NULL) BN_clear_free(r->j);
209 if (r->seed) OPENSSL_free(r->seed);
210 if (r->counter != NULL) BN_clear_free(r->counter);
211 if (r->pub_key != NULL) BN_clear_free(r->pub_key);
212 if (r->priv_key != NULL) BN_clear_free(r->priv_key);
213 OPENSSL_free(r);
214 }
215
216int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
217 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
218 {
219 dh_meth_num++;
220 return(CRYPTO_get_ex_new_index(dh_meth_num-1,
221 &dh_meth,argl,argp,new_func,dup_func,free_func));
222 }
223
224int DH_set_ex_data(DH *d, int idx, void *arg)
225 {
226 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
227 }
228
229void *DH_get_ex_data(DH *d, int idx)
230 {
231 return(CRYPTO_get_ex_data(&d->ex_data,idx));
232 }
233
234int DH_size(DH *dh)
235 {
236 return(BN_num_bytes(dh->p));
237 }
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