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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
70const char *DSA_version="DSA" OPENSSL_VERSION_PTEXT;
71
72static const DSA_METHOD *default_DSA_method = NULL;
73
74void DSA_set_default_method(const DSA_METHOD *meth)
75 {
76 default_DSA_method = meth;
77 }
78
79const DSA_METHOD *DSA_get_default_method(void)
80 {
81 if(!default_DSA_method)
82 default_DSA_method = DSA_OpenSSL();
83 return default_DSA_method;
84 }
85
86DSA *DSA_new(void)
87 {
88 return DSA_new_method(NULL);
89 }
90
91int DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
92 {
93 /* NB: The caller is specifically setting a method, so it's not up to us
94 * to deal with which ENGINE it comes from. */
95 const DSA_METHOD *mtmp;
96 mtmp = dsa->meth;
97 if (mtmp->finish) mtmp->finish(dsa);
98#ifndef OPENSSL_NO_ENGINE
99 if (dsa->engine)
100 {
101 ENGINE_finish(dsa->engine);
102 dsa->engine = NULL;
103 }
104#endif
105 dsa->meth = meth;
106 if (meth->init) meth->init(dsa);
107 return 1;
108 }
109
110DSA *DSA_new_method(ENGINE *engine)
111 {
112 DSA *ret;
113
114 ret=(DSA *)OPENSSL_malloc(sizeof(DSA));
115 if (ret == NULL)
116 {
117 DSAerr(DSA_F_DSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
118 return(NULL);
119 }
120 ret->meth = DSA_get_default_method();
121#ifndef OPENSSL_NO_ENGINE
122 if (engine)
123 {
124 if (!ENGINE_init(engine))
125 {
126 DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
127 OPENSSL_free(ret);
128 return NULL;
129 }
130 ret->engine = engine;
131 }
132 else
133 ret->engine = ENGINE_get_default_DSA();
134 if(ret->engine)
135 {
136 ret->meth = ENGINE_get_DSA(ret->engine);
137 if(!ret->meth)
138 {
139 DSAerr(DSA_F_DSA_NEW_METHOD,
140 ERR_R_ENGINE_LIB);
141 ENGINE_finish(ret->engine);
142 OPENSSL_free(ret);
143 return NULL;
144 }
145 }
146#endif
147
148 ret->pad=0;
149 ret->version=0;
150 ret->write_params=1;
151 ret->p=NULL;
152 ret->q=NULL;
153 ret->g=NULL;
154
155 ret->pub_key=NULL;
156 ret->priv_key=NULL;
157
158 ret->kinv=NULL;
159 ret->r=NULL;
160 ret->method_mont_p=NULL;
161
162 ret->references=1;
163 ret->flags=ret->meth->flags;
164 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
165 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
166 {
167#ifndef OPENSSL_NO_ENGINE
168 if (ret->engine)
169 ENGINE_finish(ret->engine);
170#endif
171 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
172 OPENSSL_free(ret);
173 ret=NULL;
174 }
175
176 return(ret);
177 }
178
179void DSA_free(DSA *r)
180 {
181 int i;
182
183 if (r == NULL) return;
184
185 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
186#ifdef REF_PRINT
187 REF_PRINT("DSA",r);
188#endif
189 if (i > 0) return;
190#ifdef REF_CHECK
191 if (i < 0)
192 {
193 fprintf(stderr,"DSA_free, bad reference count\n");
194 abort();
195 }
196#endif
197
198 if(r->meth->finish)
199 r->meth->finish(r);
200#ifndef OPENSSL_NO_ENGINE
201 if(r->engine)
202 ENGINE_finish(r->engine);
203#endif
204
205 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
206
207 if (r->p != NULL) BN_clear_free(r->p);
208 if (r->q != NULL) BN_clear_free(r->q);
209 if (r->g != NULL) BN_clear_free(r->g);
210 if (r->pub_key != NULL) BN_clear_free(r->pub_key);
211 if (r->priv_key != NULL) BN_clear_free(r->priv_key);
212 if (r->kinv != NULL) BN_clear_free(r->kinv);
213 if (r->r != NULL) BN_clear_free(r->r);
214 OPENSSL_free(r);
215 }
216
217int DSA_up_ref(DSA *r)
218 {
219 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA);
220#ifdef REF_PRINT
221 REF_PRINT("DSA",r);
222#endif
223#ifdef REF_CHECK
224 if (i < 2)
225 {
226 fprintf(stderr, "DSA_up_ref, bad reference count\n");
227 abort();
228 }
229#endif
230 return ((i > 1) ? 1 : 0);
231 }
232
233int DSA_size(const DSA *r)
234 {
235 int ret,i;
236 ASN1_INTEGER bs;
237 unsigned char buf[4]; /* 4 bytes looks really small.
238 However, i2d_ASN1_INTEGER() will not look
239 beyond the first byte, as long as the second
240 parameter is NULL. */
241
242 i=BN_num_bits(r->q);
243 bs.length=(i+7)/8;
244 bs.data=buf;
245 bs.type=V_ASN1_INTEGER;
246 /* If the top bit is set the asn1 encoding is 1 larger. */
247 buf[0]=0xff;
248
249 i=i2d_ASN1_INTEGER(&bs,NULL);
250 i+=i; /* r and s */
251 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
252 return(ret);
253 }
254
255int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
256 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
257 {
258 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, argl, argp,
259 new_func, dup_func, free_func);
260 }
261
262int DSA_set_ex_data(DSA *d, int idx, void *arg)
263 {
264 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
265 }
266
267void *DSA_get_ex_data(DSA *d, int idx)
268 {
269 return(CRYPTO_get_ex_data(&d->ex_data,idx));
270 }
271
272#ifndef OPENSSL_NO_DH
273DH *DSA_dup_DH(const DSA *r)
274 {
275 /* DSA has p, q, g, optional pub_key, optional priv_key.
276 * DH has p, optional length, g, optional pub_key, optional priv_key.
277 */
278
279 DH *ret = NULL;
280
281 if (r == NULL)
282 goto err;
283 ret = DH_new();
284 if (ret == NULL)
285 goto err;
286 if (r->p != NULL)
287 if ((ret->p = BN_dup(r->p)) == NULL)
288 goto err;
289 if (r->q != NULL)
290 ret->length = BN_num_bits(r->q);
291 if (r->g != NULL)
292 if ((ret->g = BN_dup(r->g)) == NULL)
293 goto err;
294 if (r->pub_key != NULL)
295 if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
296 goto err;
297 if (r->priv_key != NULL)
298 if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
299 goto err;
300
301 return ret;
302
303 err:
304 if (ret != NULL)
305 DH_free(ret);
306 return NULL;
307 }
308#endif
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