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diff --git a/src/lib/libcrypto/dsa/dsa_lib.c b/src/lib/libcrypto/dsa/dsa_lib.c
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1/* crypto/dsa/dsa_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/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
60
61#include <stdio.h>
62#include "cryptlib.h"
63#include <openssl/bn.h>
64#include <openssl/dsa.h>
65#include <openssl/asn1.h>
66#ifndef OPENSSL_NO_ENGINE
67#include <openssl/engine.h>
68#endif
69#ifndef OPENSSL_NO_DH
70#include <openssl/dh.h>
71#endif
72
73const char DSA_version[]="DSA" OPENSSL_VERSION_PTEXT;
74
75static const DSA_METHOD *default_DSA_method = NULL;
76
77void DSA_set_default_method(const DSA_METHOD *meth)
78 {
79#ifdef OPENSSL_FIPS
80 if (FIPS_mode() && !(meth->flags & DSA_FLAG_FIPS_METHOD))
81 {
82 DSAerr(DSA_F_DSA_SET_DEFAULT_METHOD, DSA_R_NON_FIPS_METHOD);
83 return;
84 }
85#endif
86
87 default_DSA_method = meth;
88 }
89
90const DSA_METHOD *DSA_get_default_method(void)
91 {
92 if(!default_DSA_method)
93 default_DSA_method = DSA_OpenSSL();
94 return default_DSA_method;
95 }
96
97DSA *DSA_new(void)
98 {
99 return DSA_new_method(NULL);
100 }
101
102int DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
103 {
104 /* NB: The caller is specifically setting a method, so it's not up to us
105 * to deal with which ENGINE it comes from. */
106 const DSA_METHOD *mtmp;
107#ifdef OPENSSL_FIPS
108 if (FIPS_mode() && !(meth->flags & DSA_FLAG_FIPS_METHOD))
109 {
110 DSAerr(DSA_F_DSA_SET_METHOD, DSA_R_NON_FIPS_METHOD);
111 return 0;
112 }
113#endif
114 mtmp = dsa->meth;
115 if (mtmp->finish) mtmp->finish(dsa);
116#ifndef OPENSSL_NO_ENGINE
117 if (dsa->engine)
118 {
119 ENGINE_finish(dsa->engine);
120 dsa->engine = NULL;
121 }
122#endif
123 dsa->meth = meth;
124 if (meth->init) meth->init(dsa);
125 return 1;
126 }
127
128DSA *DSA_new_method(ENGINE *engine)
129 {
130 DSA *ret;
131
132 ret=(DSA *)OPENSSL_malloc(sizeof(DSA));
133 if (ret == NULL)
134 {
135 DSAerr(DSA_F_DSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
136 return(NULL);
137 }
138 ret->meth = DSA_get_default_method();
139#ifndef OPENSSL_NO_ENGINE
140 if (engine)
141 {
142 if (!ENGINE_init(engine))
143 {
144 DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
145 OPENSSL_free(ret);
146 return NULL;
147 }
148 ret->engine = engine;
149 }
150 else
151 ret->engine = ENGINE_get_default_DSA();
152 if(ret->engine)
153 {
154 ret->meth = ENGINE_get_DSA(ret->engine);
155 if(!ret->meth)
156 {
157 DSAerr(DSA_F_DSA_NEW_METHOD,
158 ERR_R_ENGINE_LIB);
159 ENGINE_finish(ret->engine);
160 OPENSSL_free(ret);
161 return NULL;
162 }
163 }
164#endif
165#ifdef OPENSSL_FIPS
166 if (FIPS_mode() && !(ret->meth->flags & DSA_FLAG_FIPS_METHOD))
167 {
168 DSAerr(DSA_F_DSA_NEW_METHOD, DSA_R_NON_FIPS_METHOD);
169#ifndef OPENSSL_NO_ENGINE
170 if (ret->engine)
171 ENGINE_finish(ret->engine);
172#endif
173 OPENSSL_free(ret);
174 return NULL;
175 }
176#endif
177
178 ret->pad=0;
179 ret->version=0;
180 ret->write_params=1;
181 ret->p=NULL;
182 ret->q=NULL;
183 ret->g=NULL;
184
185 ret->pub_key=NULL;
186 ret->priv_key=NULL;
187
188 ret->kinv=NULL;
189 ret->r=NULL;
190 ret->method_mont_p=NULL;
191
192 ret->references=1;
193 ret->flags=ret->meth->flags;
194 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
195 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
196 {
197#ifndef OPENSSL_NO_ENGINE
198 if (ret->engine)
199 ENGINE_finish(ret->engine);
200#endif
201 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
202 OPENSSL_free(ret);
203 ret=NULL;
204 }
205
206 return(ret);
207 }
208
209void DSA_free(DSA *r)
210 {
211 int i;
212
213 if (r == NULL) return;
214
215 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
216#ifdef REF_PRINT
217 REF_PRINT("DSA",r);
218#endif
219 if (i > 0) return;
220#ifdef REF_CHECK
221 if (i < 0)
222 {
223 fprintf(stderr,"DSA_free, bad reference count\n");
224 abort();
225 }
226#endif
227
228 if(r->meth->finish)
229 r->meth->finish(r);
230#ifndef OPENSSL_NO_ENGINE
231 if(r->engine)
232 ENGINE_finish(r->engine);
233#endif
234
235 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
236
237 if (r->p != NULL) BN_clear_free(r->p);
238 if (r->q != NULL) BN_clear_free(r->q);
239 if (r->g != NULL) BN_clear_free(r->g);
240 if (r->pub_key != NULL) BN_clear_free(r->pub_key);
241 if (r->priv_key != NULL) BN_clear_free(r->priv_key);
242 if (r->kinv != NULL) BN_clear_free(r->kinv);
243 if (r->r != NULL) BN_clear_free(r->r);
244 OPENSSL_free(r);
245 }
246
247int DSA_up_ref(DSA *r)
248 {
249 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA);
250#ifdef REF_PRINT
251 REF_PRINT("DSA",r);
252#endif
253#ifdef REF_CHECK
254 if (i < 2)
255 {
256 fprintf(stderr, "DSA_up_ref, bad reference count\n");
257 abort();
258 }
259#endif
260 return ((i > 1) ? 1 : 0);
261 }
262
263int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
264 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
265 {
266 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, argl, argp,
267 new_func, dup_func, free_func);
268 }
269
270int DSA_set_ex_data(DSA *d, int idx, void *arg)
271 {
272 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
273 }
274
275void *DSA_get_ex_data(DSA *d, int idx)
276 {
277 return(CRYPTO_get_ex_data(&d->ex_data,idx));
278 }
279
280#ifndef OPENSSL_NO_DH
281DH *DSA_dup_DH(const DSA *r)
282 {
283 /* DSA has p, q, g, optional pub_key, optional priv_key.
284 * DH has p, optional length, g, optional pub_key, optional priv_key.
285 */
286
287 DH *ret = NULL;
288
289 if (r == NULL)
290 goto err;
291 ret = DH_new();
292 if (ret == NULL)
293 goto err;
294 if (r->p != NULL)
295 if ((ret->p = BN_dup(r->p)) == NULL)
296 goto err;
297 if (r->q != NULL)
298 ret->length = BN_num_bits(r->q);
299 if (r->g != NULL)
300 if ((ret->g = BN_dup(r->g)) == NULL)
301 goto err;
302 if (r->pub_key != NULL)
303 if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
304 goto err;
305 if (r->priv_key != NULL)
306 if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
307 goto err;
308
309 return ret;
310
311 err:
312 if (ret != NULL)
313 DH_free(ret);
314 return NULL;
315 }
316#endif
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