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author | cvs2svn <admin@example.com> | 2015-08-02 21:54:22 +0000 |
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committer | cvs2svn <admin@example.com> | 2015-08-02 21:54:22 +0000 |
commit | ed3760bf4be4a96a89233fb8f8b84a0d44725862 (patch) | |
tree | 5609c82060f75c53af0a7641d9b33a88574876cd /src/lib/libcrypto/dh/dh_key.c | |
parent | f8b563fb5ba1524c821d37308f4e6abfc866bc3f (diff) | |
download | openbsd-OPENBSD_5_8_BASE.tar.gz openbsd-OPENBSD_5_8_BASE.tar.bz2 openbsd-OPENBSD_5_8_BASE.zip |
This commit was manufactured by cvs2git to create tag 'OPENBSD_5_8_BASE'.OPENBSD_5_8_BASE
Diffstat (limited to 'src/lib/libcrypto/dh/dh_key.c')
-rw-r--r-- | src/lib/libcrypto/dh/dh_key.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/src/lib/libcrypto/dh/dh_key.c b/src/lib/libcrypto/dh/dh_key.c deleted file mode 100644 index 31bc7b3dfd..0000000000 --- a/src/lib/libcrypto/dh/dh_key.c +++ /dev/null | |||
@@ -1,265 +0,0 @@ | |||
1 | /* $OpenBSD: dh_key.c,v 1.23 2015/02/09 15:49:22 jsing 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/bn.h> | ||
62 | #include <openssl/dh.h> | ||
63 | #include <openssl/err.h> | ||
64 | |||
65 | static int generate_key(DH *dh); | ||
66 | static int compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh); | ||
67 | static int dh_bn_mod_exp(const DH *dh, BIGNUM *r, const BIGNUM *a, | ||
68 | const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); | ||
69 | static int dh_init(DH *dh); | ||
70 | static int dh_finish(DH *dh); | ||
71 | |||
72 | int | ||
73 | DH_generate_key(DH *dh) | ||
74 | { | ||
75 | return dh->meth->generate_key(dh); | ||
76 | } | ||
77 | |||
78 | int | ||
79 | DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh) | ||
80 | { | ||
81 | return dh->meth->compute_key(key, pub_key, dh); | ||
82 | } | ||
83 | |||
84 | static DH_METHOD dh_ossl = { | ||
85 | .name = "OpenSSL DH Method", | ||
86 | .generate_key = generate_key, | ||
87 | .compute_key = compute_key, | ||
88 | .bn_mod_exp = dh_bn_mod_exp, | ||
89 | .init = dh_init, | ||
90 | .finish = dh_finish, | ||
91 | }; | ||
92 | |||
93 | const DH_METHOD * | ||
94 | DH_OpenSSL(void) | ||
95 | { | ||
96 | return &dh_ossl; | ||
97 | } | ||
98 | |||
99 | static int | ||
100 | generate_key(DH *dh) | ||
101 | { | ||
102 | int ok = 0; | ||
103 | int generate_new_key = 0; | ||
104 | unsigned l; | ||
105 | BN_CTX *ctx; | ||
106 | BN_MONT_CTX *mont = NULL; | ||
107 | BIGNUM *pub_key = NULL, *priv_key = NULL; | ||
108 | |||
109 | ctx = BN_CTX_new(); | ||
110 | if (ctx == NULL) | ||
111 | goto err; | ||
112 | |||
113 | if (dh->priv_key == NULL) { | ||
114 | priv_key = BN_new(); | ||
115 | if (priv_key == NULL) | ||
116 | goto err; | ||
117 | generate_new_key = 1; | ||
118 | } else | ||
119 | priv_key = dh->priv_key; | ||
120 | |||
121 | if (dh->pub_key == NULL) { | ||
122 | pub_key = BN_new(); | ||
123 | if (pub_key == NULL) | ||
124 | goto err; | ||
125 | } else | ||
126 | pub_key = dh->pub_key; | ||
127 | |||
128 | if (dh->flags & DH_FLAG_CACHE_MONT_P) { | ||
129 | mont = BN_MONT_CTX_set_locked(&dh->method_mont_p, | ||
130 | CRYPTO_LOCK_DH, dh->p, ctx); | ||
131 | if (!mont) | ||
132 | goto err; | ||
133 | } | ||
134 | |||
135 | if (generate_new_key) { | ||
136 | if (dh->q) { | ||
137 | do { | ||
138 | if (!BN_rand_range(priv_key, dh->q)) | ||
139 | goto err; | ||
140 | } while (BN_is_zero(priv_key) || BN_is_one(priv_key)); | ||
141 | } else { | ||
142 | /* secret exponent length */ | ||
143 | l = dh->length ? dh->length : BN_num_bits(dh->p) - 1; | ||
144 | if (!BN_rand(priv_key, l, 0, 0)) | ||
145 | goto err; | ||
146 | } | ||
147 | } | ||
148 | |||
149 | { | ||
150 | BIGNUM local_prk; | ||
151 | BIGNUM *prk; | ||
152 | |||
153 | if ((dh->flags & DH_FLAG_NO_EXP_CONSTTIME) == 0) { | ||
154 | BN_init(&local_prk); | ||
155 | prk = &local_prk; | ||
156 | BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME); | ||
157 | } else | ||
158 | prk = priv_key; | ||
159 | |||
160 | if (!dh->meth->bn_mod_exp(dh, pub_key, dh->g, prk, dh->p, ctx, | ||
161 | mont)) | ||
162 | goto err; | ||
163 | } | ||
164 | |||
165 | dh->pub_key = pub_key; | ||
166 | dh->priv_key = priv_key; | ||
167 | ok = 1; | ||
168 | err: | ||
169 | if (ok != 1) | ||
170 | DHerr(DH_F_GENERATE_KEY, ERR_R_BN_LIB); | ||
171 | |||
172 | if (pub_key != NULL && dh->pub_key == NULL) | ||
173 | BN_free(pub_key); | ||
174 | if (priv_key != NULL && dh->priv_key == NULL) | ||
175 | BN_free(priv_key); | ||
176 | BN_CTX_free(ctx); | ||
177 | return ok; | ||
178 | } | ||
179 | |||
180 | static int | ||
181 | compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh) | ||
182 | { | ||
183 | BN_CTX *ctx = NULL; | ||
184 | BN_MONT_CTX *mont = NULL; | ||
185 | BIGNUM *tmp; | ||
186 | int ret = -1; | ||
187 | int check_result; | ||
188 | |||
189 | if (BN_num_bits(dh->p) > OPENSSL_DH_MAX_MODULUS_BITS) { | ||
190 | DHerr(DH_F_COMPUTE_KEY, DH_R_MODULUS_TOO_LARGE); | ||
191 | goto err; | ||
192 | } | ||
193 | |||
194 | ctx = BN_CTX_new(); | ||
195 | if (ctx == NULL) | ||
196 | goto err; | ||
197 | BN_CTX_start(ctx); | ||
198 | if ((tmp = BN_CTX_get(ctx)) == NULL) | ||
199 | goto err; | ||
200 | |||
201 | if (dh->priv_key == NULL) { | ||
202 | DHerr(DH_F_COMPUTE_KEY, DH_R_NO_PRIVATE_VALUE); | ||
203 | goto err; | ||
204 | } | ||
205 | |||
206 | if (dh->flags & DH_FLAG_CACHE_MONT_P) { | ||
207 | mont = BN_MONT_CTX_set_locked(&dh->method_mont_p, | ||
208 | CRYPTO_LOCK_DH, dh->p, ctx); | ||
209 | if ((dh->flags & DH_FLAG_NO_EXP_CONSTTIME) == 0) { | ||
210 | /* XXX */ | ||
211 | BN_set_flags(dh->priv_key, BN_FLG_CONSTTIME); | ||
212 | } | ||
213 | if (!mont) | ||
214 | goto err; | ||
215 | } | ||
216 | |||
217 | if (!DH_check_pub_key(dh, pub_key, &check_result) || check_result) { | ||
218 | DHerr(DH_F_COMPUTE_KEY, DH_R_INVALID_PUBKEY); | ||
219 | goto err; | ||
220 | } | ||
221 | |||
222 | if (!dh->meth->bn_mod_exp(dh, tmp, pub_key, dh->priv_key, dh->p, ctx, | ||
223 | mont)) { | ||
224 | DHerr(DH_F_COMPUTE_KEY, ERR_R_BN_LIB); | ||
225 | goto err; | ||
226 | } | ||
227 | |||
228 | ret = BN_bn2bin(tmp, key); | ||
229 | err: | ||
230 | if (ctx != NULL) { | ||
231 | BN_CTX_end(ctx); | ||
232 | BN_CTX_free(ctx); | ||
233 | } | ||
234 | return ret; | ||
235 | } | ||
236 | |||
237 | static int | ||
238 | dh_bn_mod_exp(const DH *dh, BIGNUM *r, const BIGNUM *a, const BIGNUM *p, | ||
239 | const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) | ||
240 | { | ||
241 | /* | ||
242 | * If a is only one word long and constant time is false, use the faster | ||
243 | * exponenentiation function. | ||
244 | */ | ||
245 | if (a->top == 1 && (dh->flags & DH_FLAG_NO_EXP_CONSTTIME) != 0) { | ||
246 | BN_ULONG A = a->d[0]; | ||
247 | |||
248 | return BN_mod_exp_mont_word(r, A, p, m, ctx, m_ctx); | ||
249 | } else | ||
250 | return BN_mod_exp_mont(r, a, p, m, ctx, m_ctx); | ||
251 | } | ||
252 | |||
253 | static int | ||
254 | dh_init(DH *dh) | ||
255 | { | ||
256 | dh->flags |= DH_FLAG_CACHE_MONT_P; | ||
257 | return 1; | ||
258 | } | ||
259 | |||
260 | static int | ||
261 | dh_finish(DH *dh) | ||
262 | { | ||
263 | BN_MONT_CTX_free(dh->method_mont_p); | ||
264 | return 1; | ||
265 | } | ||