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dh_lib.c

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1/* $OpenBSD: dh_lib.c,v 1.32 2018/05/02 15:48:38 tb 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 <limits.h>-
60#include <stdio.h>-
61-
62#include <openssl/opensslconf.h>-
63-
64#include <openssl/bn.h>-
65#include <openssl/dh.h>-
66#include <openssl/err.h>-
67-
68#ifndef OPENSSL_NO_ENGINE-
69#include <openssl/engine.h>-
70#endif-
71-
72static const DH_METHOD *default_DH_method = NULL;-
73-
74void-
75DH_set_default_method(const DH_METHOD *meth)-
76{-
77 default_DH_method = meth;-
78}
never executed: end of block
0
79-
80const DH_METHOD *-
81DH_get_default_method(void)-
82{-
83 if (!default_DH_method)
!default_DH_methodDescription
TRUEevaluated 52 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
FALSEevaluated 178 times by 3 tests
Evaluated by:
  • mont
  • servertest
  • ssltest
52-178
84 default_DH_method = DH_OpenSSL();
executed 52 times by 4 tests: default_DH_method = DH_OpenSSL();
Executed by:
  • dhtest
  • mont
  • servertest
  • ssltest
52
85 return default_DH_method;
executed 230 times by 4 tests: return default_DH_method;
Executed by:
  • dhtest
  • mont
  • servertest
  • ssltest
230
86}-
87-
88int-
89DH_set_method(DH *dh, const DH_METHOD *meth)-
90{-
91 /*-
92 * NB: The caller is specifically setting a method, so it's not up to us-
93 * to deal with which ENGINE it comes from.-
94 */-
95 const DH_METHOD *mtmp;-
96-
97 mtmp = dh->meth;-
98 if (mtmp->finish)
mtmp->finishDescription
TRUEnever evaluated
FALSEnever evaluated
0
99 mtmp->finish(dh);
never executed: mtmp->finish(dh);
0
100#ifndef OPENSSL_NO_ENGINE-
101 ENGINE_finish(dh->engine);-
102 dh->engine = NULL;-
103#endif-
104 dh->meth = meth;-
105 if (meth->init)
meth->initDescription
TRUEnever evaluated
FALSEnever evaluated
0
106 meth->init(dh);
never executed: meth->init(dh);
0
107 return 1;
never executed: return 1;
0
108}-
109-
110DH *-
111DH_new(void)-
112{-
113 return DH_new_method(NULL);
executed 230 times by 4 tests: return DH_new_method( ((void *)0) );
Executed by:
  • dhtest
  • mont
  • servertest
  • ssltest
230
114}-
115-
116DH *-
117DH_new_method(ENGINE *engine)-
118{-
119 DH *ret;-
120-
121 ret = malloc(sizeof(DH));-
122 if (ret == NULL) {
ret == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 230 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
0-230
123 DHerror(ERR_R_MALLOC_FAILURE);-
124 return NULL;
never executed: return ((void *)0) ;
0
125 }-
126-
127 ret->meth = DH_get_default_method();-
128#ifndef OPENSSL_NO_ENGINE-
129 if (engine) {
engineDescription
TRUEnever evaluated
FALSEevaluated 230 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
0-230
130 if (!ENGINE_init(engine)) {
!ENGINE_init(engine)Description
TRUEnever evaluated
FALSEnever evaluated
0
131 DHerror(ERR_R_ENGINE_LIB);-
132 free(ret);-
133 return NULL;
never executed: return ((void *)0) ;
0
134 }-
135 ret->engine = engine;-
136 } else
never executed: end of block
0
137 ret->engine = ENGINE_get_default_DH();
executed 230 times by 4 tests: ret->engine = ENGINE_get_default_DH();
Executed by:
  • dhtest
  • mont
  • servertest
  • ssltest
230
138 if(ret->engine) {
ret->engineDescription
TRUEnever evaluated
FALSEevaluated 230 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
0-230
139 ret->meth = ENGINE_get_DH(ret->engine);-
140 if (ret->meth == NULL) {
ret->meth == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
141 DHerror(ERR_R_ENGINE_LIB);-
142 ENGINE_finish(ret->engine);-
143 free(ret);-
144 return NULL;
never executed: return ((void *)0) ;
0
145 }-
146 }
never executed: end of block
0
147#endif-
148-
149 ret->pad = 0;-
150 ret->version = 0;-
151 ret->p = NULL;-
152 ret->g = NULL;-
153 ret->length = 0;-
154 ret->pub_key = NULL;-
155 ret->priv_key = NULL;-
156 ret->q = NULL;-
157 ret->j = NULL;-
158 ret->seed = NULL;-
159 ret->seedlen = 0;-
160 ret->counter = NULL;-
161 ret->method_mont_p=NULL;-
162 ret->references = 1;-
163 ret->flags = ret->meth->flags & ~DH_FLAG_NON_FIPS_ALLOW;-
164 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);-
165 if (ret->meth->init != NULL && !ret->meth->init(ret)) {
ret->meth->init != ((void *)0)Description
TRUEevaluated 230 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
FALSEnever evaluated
!ret->meth->init(ret)Description
TRUEnever evaluated
FALSEevaluated 230 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
0-230
166#ifndef OPENSSL_NO_ENGINE-
167 ENGINE_finish(ret->engine);-
168#endif-
169 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);-
170 free(ret);-
171 ret = NULL;-
172 }
never executed: end of block
0
173 return ret;
executed 230 times by 4 tests: return ret;
Executed by:
  • dhtest
  • mont
  • servertest
  • ssltest
230
174}-
175-
176void-
177DH_free(DH *r)-
178{-
179 int i;-
180-
181 if (r == NULL)
r == ((void *)0)Description
TRUEevaluated 1380 times by 14 tests
Evaluated by:
  • cipher_list
  • cipherstest
  • clienttest
  • configtest
  • freenull
  • libcrypto.so.44.0.1
  • servertest
  • ssl_versions
  • ssltest
  • tls_ext_alpn
  • tls_prf
  • tlsexttest
  • tlstest
  • verifytest
FALSEevaluated 230 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
230-1380
182 return;
executed 1380 times by 14 tests: return;
Executed by:
  • cipher_list
  • cipherstest
  • clienttest
  • configtest
  • freenull
  • libcrypto.so.44.0.1
  • servertest
  • ssl_versions
  • ssltest
  • tls_ext_alpn
  • tls_prf
  • tlsexttest
  • tlstest
  • verifytest
1380
183 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);-
184 if (i > 0)
i > 0Description
TRUEnever evaluated
FALSEevaluated 230 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
0-230
185 return;
never executed: return;
0
186-
187 if (r->meth->finish)
r->meth->finishDescription
TRUEevaluated 230 times by 4 tests
Evaluated by:
  • dhtest
  • mont
  • servertest
  • ssltest
FALSEnever evaluated
0-230
188 r->meth->finish(r);
executed 230 times by 4 tests: r->meth->finish(r);
Executed by:
  • dhtest
  • mont
  • servertest
  • ssltest
230
189#ifndef OPENSSL_NO_ENGINE-
190 ENGINE_finish(r->engine);-
191#endif-
192-
193 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);-
194-
195 BN_clear_free(r->p);-
196 BN_clear_free(r->g);-
197 BN_clear_free(r->q);-
198 BN_clear_free(r->j);-
199 free(r->seed);-
200 BN_clear_free(r->counter);-
201 BN_clear_free(r->pub_key);-
202 BN_clear_free(r->priv_key);-
203 free(r);-
204}
executed 230 times by 4 tests: end of block
Executed by:
  • dhtest
  • mont
  • servertest
  • ssltest
230
205-
206int-
207DH_up_ref(DH *r)-
208{-
209 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH);-
210-
211 return i > 1 ? 1 : 0;
never executed: return i > 1 ? 1 : 0;
i > 1Description
TRUEnever evaluated
FALSEnever evaluated
0
212}-
213-
214int-
215DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,-
216 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)-
217{-
218 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp, new_func,
never executed: return CRYPTO_get_ex_new_index(8, argl, argp, new_func, dup_func, free_func);
0
219 dup_func, free_func);
never executed: return CRYPTO_get_ex_new_index(8, argl, argp, new_func, dup_func, free_func);
0
220}-
221-
222int-
223DH_set_ex_data(DH *d, int idx, void *arg)-
224{-
225 return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
never executed: return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
0
226}-
227-
228void *-
229DH_get_ex_data(DH *d, int idx)-
230{-
231 return CRYPTO_get_ex_data(&d->ex_data, idx);
never executed: return CRYPTO_get_ex_data(&d->ex_data, idx);
0
232}-
233-
234int-
235DH_size(const DH *dh)-
236{-
237 return BN_num_bytes(dh->p);
executed 81 times by 3 tests: return ((BN_num_bits(dh->p)+7)/8);
Executed by:
  • dhtest
  • mont
  • ssltest
81
238}-
239-
240int-
241DH_bits(const DH *dh)-
242{-
243 return BN_num_bits(dh->p);
never executed: return BN_num_bits(dh->p);
0
244}-
245-
246ENGINE *-
247DH_get0_engine(DH *dh)-
248{-
249 return dh->engine;
never executed: return dh->engine;
0
250}-
251-
252void-
253DH_get0_pqg(const DH *dh, const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)-
254{-
255 if (p != NULL)
p != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
256 *p = dh->p;
never executed: *p = dh->p;
0
257 if (q != NULL)
q != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
258 *q = dh->q;
never executed: *q = dh->q;
0
259 if (g != NULL)
g != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
260 *g = dh->g;
never executed: *g = dh->g;
0
261}
never executed: end of block
0
262-
263int-
264DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)-
265{-
266 if ((dh->p == NULL && p == NULL) || (dh->g == NULL && g == NULL))
dh->p == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
p == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
dh->g == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
g == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
267 return 0;
never executed: return 0;
0
268-
269 if (p != NULL) {
p != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
270 BN_free(dh->p);-
271 dh->p = p;-
272 }
never executed: end of block
0
273 if (q != NULL) {
q != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
274 BN_free(dh->q);-
275 dh->q = q;-
276 }
never executed: end of block
0
277 if (g != NULL) {
g != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
278 BN_free(dh->g);-
279 dh->g = g;-
280 }
never executed: end of block
0
281-
282 return 1;
never executed: return 1;
0
283}-
284-
285void-
286DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key)-
287{-
288 if (pub_key != NULL)
pub_key != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
289 *pub_key = dh->pub_key;
never executed: *pub_key = dh->pub_key;
0
290 if (priv_key != NULL)
priv_key != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
291 *priv_key = dh->priv_key;
never executed: *priv_key = dh->priv_key;
0
292}
never executed: end of block
0
293-
294int-
295DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key)-
296{-
297 if (pub_key != NULL) {
pub_key != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
298 BN_free(dh->pub_key);-
299 dh->pub_key = pub_key;-
300 }
never executed: end of block
0
301 if (priv_key != NULL) {
priv_key != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
302 BN_free(dh->priv_key);-
303 dh->priv_key = priv_key;-
304 }
never executed: end of block
0
305-
306 return 1;
never executed: return 1;
0
307}-
308-
309void-
310DH_clear_flags(DH *dh, int flags)-
311{-
312 dh->flags &= ~flags;-
313}
never executed: end of block
0
314-
315int-
316DH_test_flags(const DH *dh, int flags)-
317{-
318 return dh->flags & flags;
never executed: return dh->flags & flags;
0
319}-
320-
321void-
322DH_set_flags(DH *dh, int flags)-
323{-
324 dh->flags |= flags;-
325}
never executed: end of block
0
326-
327int-
328DH_set_length(DH *dh, long length)-
329{-
330 if (length < 0 || length > INT_MAX)
length < 0Description
TRUEnever evaluated
FALSEnever evaluated
length > 0x7fffffffDescription
TRUEnever evaluated
FALSEnever evaluated
0
331 return 0;
never executed: return 0;
0
332-
333 dh->length = length;-
334 return 1;
never executed: return 1;
0
335}-
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