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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#include <openssl/engine.h>
67
68const char *DSA_version="DSA" OPENSSL_VERSION_PTEXT;
69
70static DSA_METHOD *default_DSA_method;
71static int dsa_meth_num = 0;
72static STACK_OF(CRYPTO_EX_DATA_FUNCS) *dsa_meth = NULL;
73
74void DSA_set_default_openssl_method(DSA_METHOD *meth)
75{
76 ENGINE *e;
77 /* We'll need to notify the "openssl" ENGINE of this
78 * change too. We won't bother locking things down at
79 * our end as there was never any locking in these
80 * functions! */
81 if(default_DSA_method != meth)
82 {
83 default_DSA_method = meth;
84 e = ENGINE_by_id("openssl");
85 if(e)
86 {
87 ENGINE_set_DSA(e, meth);
88 ENGINE_free(e);
89 }
90 }
91}
92
93DSA_METHOD *DSA_get_default_openssl_method(void)
94{
95 if(!default_DSA_method) default_DSA_method = DSA_OpenSSL();
96 return default_DSA_method;
97}
98
99DSA *DSA_new(void)
100{
101 return DSA_new_method(NULL);
102}
103
104#if 0
105DSA_METHOD *DSA_set_method(DSA *dsa, DSA_METHOD *meth)
106{
107 DSA_METHOD *mtmp;
108 mtmp = dsa->meth;
109 if (mtmp->finish) mtmp->finish(dsa);
110 dsa->meth = meth;
111 if (meth->init) meth->init(dsa);
112 return mtmp;
113}
114#else
115int DSA_set_method(DSA *dsa, ENGINE *engine)
116 {
117 ENGINE *mtmp;
118 DSA_METHOD *meth;
119 mtmp = dsa->engine;
120 meth = ENGINE_get_DSA(mtmp);
121 if (!ENGINE_init(engine))
122 return 0;
123 if (meth->finish) meth->finish(dsa);
124 dsa->engine = engine;
125 meth = ENGINE_get_DSA(engine);
126 if (meth->init) meth->init(dsa);
127 /* SHOULD ERROR CHECK THIS!!! */
128 ENGINE_finish(mtmp);
129 return 1;
130 }
131#endif
132
133
134#if 0
135DSA *DSA_new_method(DSA_METHOD *meth)
136#else
137DSA *DSA_new_method(ENGINE *engine)
138#endif
139 {
140 DSA_METHOD *meth;
141 DSA *ret;
142
143 ret=(DSA *)OPENSSL_malloc(sizeof(DSA));
144 if (ret == NULL)
145 {
146 DSAerr(DSA_F_DSA_NEW,ERR_R_MALLOC_FAILURE);
147 return(NULL);
148 }
149 if(engine)
150 ret->engine = engine;
151 else
152 {
153 if((ret->engine=ENGINE_get_default_DSA()) == NULL)
154 {
155 OPENSSL_free(ret);
156 return NULL;
157 }
158 }
159 meth = ENGINE_get_DSA(ret->engine);
160 ret->pad=0;
161 ret->version=0;
162 ret->write_params=1;
163 ret->p=NULL;
164 ret->q=NULL;
165 ret->g=NULL;
166
167 ret->pub_key=NULL;
168 ret->priv_key=NULL;
169
170 ret->kinv=NULL;
171 ret->r=NULL;
172 ret->method_mont_p=NULL;
173
174 ret->references=1;
175 ret->flags=meth->flags;
176 CRYPTO_new_ex_data(dsa_meth,ret,&ret->ex_data);
177 if ((meth->init != NULL) && !meth->init(ret))
178 {
179 CRYPTO_free_ex_data(dsa_meth,ret,&ret->ex_data);
180 OPENSSL_free(ret);
181 ret=NULL;
182 }
183
184 return(ret);
185 }
186
187void DSA_free(DSA *r)
188 {
189 DSA_METHOD *meth;
190 int i;
191
192 if (r == NULL) return;
193
194 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
195#ifdef REF_PRINT
196 REF_PRINT("DSA",r);
197#endif
198 if (i > 0) return;
199#ifdef REF_CHECK
200 if (i < 0)
201 {
202 fprintf(stderr,"DSA_free, bad reference count\n");
203 abort();
204 }
205#endif
206
207 meth = ENGINE_get_DSA(r->engine);
208 if(meth->finish) meth->finish(r);
209 ENGINE_finish(r->engine);
210
211 CRYPTO_free_ex_data(dsa_meth, r, &r->ex_data);
212
213 if (r->p != NULL) BN_clear_free(r->p);
214 if (r->q != NULL) BN_clear_free(r->q);
215 if (r->g != NULL) BN_clear_free(r->g);
216 if (r->pub_key != NULL) BN_clear_free(r->pub_key);
217 if (r->priv_key != NULL) BN_clear_free(r->priv_key);
218 if (r->kinv != NULL) BN_clear_free(r->kinv);
219 if (r->r != NULL) BN_clear_free(r->r);
220 OPENSSL_free(r);
221 }
222
223int DSA_size(DSA *r)
224 {
225 int ret,i;
226 ASN1_INTEGER bs;
227 unsigned char buf[4];
228
229 i=BN_num_bits(r->q);
230 bs.length=(i+7)/8;
231 bs.data=buf;
232 bs.type=V_ASN1_INTEGER;
233 /* If the top bit is set the asn1 encoding is 1 larger. */
234 buf[0]=0xff;
235
236 i=i2d_ASN1_INTEGER(&bs,NULL);
237 i+=i; /* r and s */
238 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
239 return(ret);
240 }
241
242int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
243 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
244 {
245 dsa_meth_num++;
246 return(CRYPTO_get_ex_new_index(dsa_meth_num-1,
247 &dsa_meth,argl,argp,new_func,dup_func,free_func));
248 }
249
250int DSA_set_ex_data(DSA *d, int idx, void *arg)
251 {
252 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
253 }
254
255void *DSA_get_ex_data(DSA *d, int idx)
256 {
257 return(CRYPTO_get_ex_data(&d->ex_data,idx));
258 }
259
260#ifndef NO_DH
261DH *DSA_dup_DH(DSA *r)
262 {
263 /* DSA has p, q, g, optional pub_key, optional priv_key.
264 * DH has p, optional length, g, optional pub_key, optional priv_key.
265 */
266
267 DH *ret = NULL;
268
269 if (r == NULL)
270 goto err;
271 ret = DH_new();
272 if (ret == NULL)
273 goto err;
274 if (r->p != NULL)
275 if ((ret->p = BN_dup(r->p)) == NULL)
276 goto err;
277 if (r->q != NULL)
278 ret->length = BN_num_bits(r->q);
279 if (r->g != NULL)
280 if ((ret->g = BN_dup(r->g)) == NULL)
281 goto err;
282 if (r->pub_key != NULL)
283 if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
284 goto err;
285 if (r->priv_key != NULL)
286 if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
287 goto err;
288
289 return ret;
290
291 err:
292 if (ret != NULL)
293 DH_free(ret);
294 return NULL;
295 }
296#endif
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