]>
Commit | Line | Data |
---|---|---|
58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
57 | ||
58 | #include <stdio.h> | |
b39fc560 | 59 | #include "internal/cryptlib.h" |
ec577822 BM |
60 | #include <openssl/bn.h> |
61 | #include <openssl/dh.h> | |
0b13e9f0 | 62 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 63 | # include <openssl/engine.h> |
0b13e9f0 | 64 | #endif |
d02b48c6 | 65 | |
3a644582 | 66 | static const DH_METHOD *default_DH_method = NULL; |
13066cee | 67 | |
cb78486d | 68 | void DH_set_default_method(const DH_METHOD *meth) |
0f113f3e MC |
69 | { |
70 | default_DH_method = meth; | |
71 | } | |
13066cee | 72 | |
cb78486d | 73 | const DH_METHOD *DH_get_default_method(void) |
0f113f3e MC |
74 | { |
75 | if (!default_DH_method) | |
76 | default_DH_method = DH_OpenSSL(); | |
77 | return default_DH_method; | |
78 | } | |
13066cee | 79 | |
cb78486d | 80 | int DH_set_method(DH *dh, const DH_METHOD *meth) |
0f113f3e MC |
81 | { |
82 | /* | |
83 | * NB: The caller is specifically setting a method, so it's not up to us | |
84 | * to deal with which ENGINE it comes from. | |
85 | */ | |
86 | const DH_METHOD *mtmp; | |
87 | mtmp = dh->meth; | |
88 | if (mtmp->finish) | |
89 | mtmp->finish(dh); | |
0b13e9f0 | 90 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd RS |
91 | ENGINE_finish(dh->engine); |
92 | dh->engine = NULL; | |
0b13e9f0 | 93 | #endif |
0f113f3e MC |
94 | dh->meth = meth; |
95 | if (meth->init) | |
96 | meth->init(dh); | |
97 | return 1; | |
98 | } | |
13066cee | 99 | |
6b691a5c | 100 | DH *DH_new(void) |
0f113f3e MC |
101 | { |
102 | return DH_new_method(NULL); | |
103 | } | |
13066cee | 104 | |
5270e702 | 105 | DH *DH_new_method(ENGINE *engine) |
0f113f3e | 106 | { |
64b25758 | 107 | DH *ret = OPENSSL_zalloc(sizeof(*ret)); |
13066cee | 108 | |
0f113f3e MC |
109 | if (ret == NULL) { |
110 | DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE); | |
111 | return (NULL); | |
112 | } | |
0c9de428 | 113 | |
0f113f3e | 114 | ret->meth = DH_get_default_method(); |
0b13e9f0 | 115 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
116 | if (engine) { |
117 | if (!ENGINE_init(engine)) { | |
118 | DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); | |
119 | OPENSSL_free(ret); | |
120 | return NULL; | |
121 | } | |
122 | ret->engine = engine; | |
123 | } else | |
124 | ret->engine = ENGINE_get_default_DH(); | |
125 | if (ret->engine) { | |
126 | ret->meth = ENGINE_get_DH(ret->engine); | |
7c96dbcd | 127 | if (ret->meth == NULL) { |
0f113f3e MC |
128 | DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); |
129 | ENGINE_finish(ret->engine); | |
130 | OPENSSL_free(ret); | |
131 | return NULL; | |
132 | } | |
133 | } | |
0b13e9f0 | 134 | #endif |
cb78486d | 135 | |
0f113f3e MC |
136 | ret->references = 1; |
137 | ret->flags = ret->meth->flags; | |
138 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); | |
139 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { | |
0b13e9f0 | 140 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 141 | ENGINE_finish(ret->engine); |
0b13e9f0 | 142 | #endif |
0f113f3e MC |
143 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); |
144 | OPENSSL_free(ret); | |
145 | ret = NULL; | |
146 | } | |
147 | return (ret); | |
148 | } | |
d02b48c6 | 149 | |
6b691a5c | 150 | void DH_free(DH *r) |
0f113f3e MC |
151 | { |
152 | int i; | |
d6407083 | 153 | |
0f113f3e MC |
154 | if (r == NULL) |
155 | return; | |
156 | i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); | |
f3f1cf84 | 157 | REF_PRINT_COUNT("DH", r); |
0f113f3e MC |
158 | if (i > 0) |
159 | return; | |
f3f1cf84 | 160 | REF_ASSERT_ISNT(i < 0); |
13066cee | 161 | |
0f113f3e MC |
162 | if (r->meth->finish) |
163 | r->meth->finish(r); | |
0b13e9f0 | 164 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 165 | ENGINE_finish(r->engine); |
0b13e9f0 | 166 | #endif |
ac8b4ee0 | 167 | |
0f113f3e | 168 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); |
d50f1bdf | 169 | |
23a1d5e9 RS |
170 | BN_clear_free(r->p); |
171 | BN_clear_free(r->g); | |
172 | BN_clear_free(r->q); | |
173 | BN_clear_free(r->j); | |
b548a1f1 | 174 | OPENSSL_free(r->seed); |
23a1d5e9 RS |
175 | BN_clear_free(r->counter); |
176 | BN_clear_free(r->pub_key); | |
177 | BN_clear_free(r->priv_key); | |
0f113f3e MC |
178 | OPENSSL_free(r); |
179 | } | |
d02b48c6 | 180 | |
dc2a33d6 | 181 | int DH_up_ref(DH *r) |
0f113f3e MC |
182 | { |
183 | int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH); | |
f3f1cf84 RS |
184 | |
185 | REF_PRINT_COUNT("DH", r); | |
186 | REF_ASSERT_ISNT(i < 2); | |
0f113f3e MC |
187 | return ((i > 1) ? 1 : 0); |
188 | } | |
5cbc2e8b | 189 | |
dd9d233e | 190 | int DH_set_ex_data(DH *d, int idx, void *arg) |
0f113f3e MC |
191 | { |
192 | return (CRYPTO_set_ex_data(&d->ex_data, idx, arg)); | |
193 | } | |
13066cee | 194 | |
dd9d233e | 195 | void *DH_get_ex_data(DH *d, int idx) |
0f113f3e MC |
196 | { |
197 | return (CRYPTO_get_ex_data(&d->ex_data, idx)); | |
198 | } | |
13066cee | 199 | |
26c79d56 KR |
200 | int DH_bits(const DH *dh) |
201 | { | |
202 | return BN_num_bits(dh->p); | |
203 | } | |
204 | ||
f971ccb2 | 205 | int DH_size(const DH *dh) |
0f113f3e MC |
206 | { |
207 | return (BN_num_bytes(dh->p)); | |
208 | } | |
2514fa79 DSH |
209 | |
210 | int DH_security_bits(const DH *dh) | |
0f113f3e MC |
211 | { |
212 | int N; | |
213 | if (dh->q) | |
214 | N = BN_num_bits(dh->q); | |
215 | else if (dh->length) | |
216 | N = dh->length; | |
217 | else | |
218 | N = -1; | |
219 | return BN_security_bits(BN_num_bits(dh->p), N); | |
220 | } |