|
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 © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
|
62 */ |
|
63 |
|
64 |
|
65 #include <stdio.h> |
|
66 #include "cryptlib.h" |
|
67 #include <openssl/bn.h> |
|
68 #include <openssl/dsa.h> |
|
69 #include <openssl/asn1.h> |
|
70 #ifndef OPENSSL_NO_ENGINE |
|
71 #include <openssl/engine.h> |
|
72 #endif |
|
73 #ifndef OPENSSL_NO_DH |
|
74 #include <openssl/dh.h> |
|
75 #endif |
|
76 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__))) |
|
77 #include "libcrypto_wsd_macros.h" |
|
78 #include "libcrypto_wsd.h" |
|
79 #endif |
|
80 |
|
81 const char DSA_version[]="DSA" OPENSSL_VERSION_PTEXT; |
|
82 |
|
83 #ifndef EMULATOR |
|
84 static const DSA_METHOD *default_DSA_method = NULL; |
|
85 #else |
|
86 GET_STATIC_VAR_FROM_TLS(default_DSA_method,dsa_lib,const DSA_METHOD *) |
|
87 #define default_DSA_method (*GET_WSD_VAR_NAME(default_DSA_method,dsa_lib, s)()) |
|
88 #endif |
|
89 |
|
90 EXPORT_C void DSA_set_default_method(const DSA_METHOD *meth) |
|
91 { |
|
92 default_DSA_method = meth; |
|
93 } |
|
94 |
|
95 EXPORT_C const DSA_METHOD *DSA_get_default_method(void) |
|
96 { |
|
97 if(!default_DSA_method) |
|
98 default_DSA_method = DSA_OpenSSL(); |
|
99 return default_DSA_method; |
|
100 } |
|
101 |
|
102 EXPORT_C DSA *DSA_new(void) |
|
103 { |
|
104 return DSA_new_method(NULL); |
|
105 } |
|
106 |
|
107 EXPORT_C int DSA_set_method(DSA *dsa, const DSA_METHOD *meth) |
|
108 { |
|
109 /* NB: The caller is specifically setting a method, so it's not up to us |
|
110 * to deal with which ENGINE it comes from. */ |
|
111 const DSA_METHOD *mtmp; |
|
112 mtmp = dsa->meth; |
|
113 if (mtmp->finish) mtmp->finish(dsa); |
|
114 #ifndef OPENSSL_NO_ENGINE |
|
115 if (dsa->engine) |
|
116 { |
|
117 ENGINE_finish(dsa->engine); |
|
118 dsa->engine = NULL; |
|
119 } |
|
120 #endif |
|
121 dsa->meth = meth; |
|
122 if (meth->init) meth->init(dsa); |
|
123 return 1; |
|
124 } |
|
125 |
|
126 EXPORT_C DSA *DSA_new_method(ENGINE *engine) |
|
127 { |
|
128 DSA *ret; |
|
129 |
|
130 ret=(DSA *)OPENSSL_malloc(sizeof(DSA)); |
|
131 if (ret == NULL) |
|
132 { |
|
133 DSAerr(DSA_F_DSA_NEW_METHOD,ERR_R_MALLOC_FAILURE); |
|
134 return(NULL); |
|
135 } |
|
136 ret->meth = DSA_get_default_method(); |
|
137 #ifndef OPENSSL_NO_ENGINE |
|
138 if (engine) |
|
139 { |
|
140 if (!ENGINE_init(engine)) |
|
141 { |
|
142 DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB); |
|
143 OPENSSL_free(ret); |
|
144 return NULL; |
|
145 } |
|
146 ret->engine = engine; |
|
147 } |
|
148 else |
|
149 ret->engine = ENGINE_get_default_DSA(); |
|
150 if(ret->engine) |
|
151 { |
|
152 ret->meth = ENGINE_get_DSA(ret->engine); |
|
153 if(!ret->meth) |
|
154 { |
|
155 DSAerr(DSA_F_DSA_NEW_METHOD, |
|
156 ERR_R_ENGINE_LIB); |
|
157 ENGINE_finish(ret->engine); |
|
158 OPENSSL_free(ret); |
|
159 return NULL; |
|
160 } |
|
161 } |
|
162 #endif |
|
163 |
|
164 ret->pad=0; |
|
165 ret->version=0; |
|
166 ret->write_params=1; |
|
167 ret->p=NULL; |
|
168 ret->q=NULL; |
|
169 ret->g=NULL; |
|
170 |
|
171 ret->pub_key=NULL; |
|
172 ret->priv_key=NULL; |
|
173 |
|
174 ret->kinv=NULL; |
|
175 ret->r=NULL; |
|
176 ret->method_mont_p=NULL; |
|
177 |
|
178 ret->references=1; |
|
179 ret->flags=ret->meth->flags; |
|
180 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data); |
|
181 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) |
|
182 { |
|
183 #ifndef OPENSSL_NO_ENGINE |
|
184 if (ret->engine) |
|
185 ENGINE_finish(ret->engine); |
|
186 #endif |
|
187 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data); |
|
188 OPENSSL_free(ret); |
|
189 ret=NULL; |
|
190 } |
|
191 |
|
192 return(ret); |
|
193 } |
|
194 |
|
195 EXPORT_C void DSA_free(DSA *r) |
|
196 { |
|
197 int i; |
|
198 |
|
199 if (r == NULL) return; |
|
200 |
|
201 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA); |
|
202 #ifdef REF_PRINT |
|
203 REF_PRINT("DSA",r); |
|
204 #endif |
|
205 if (i > 0) return; |
|
206 #ifdef REF_CHECK |
|
207 if (i < 0) |
|
208 { |
|
209 fprintf(stderr,"DSA_free, bad reference count\n"); |
|
210 abort(); |
|
211 } |
|
212 #endif |
|
213 |
|
214 if(r->meth->finish) |
|
215 r->meth->finish(r); |
|
216 #ifndef OPENSSL_NO_ENGINE |
|
217 if(r->engine) |
|
218 ENGINE_finish(r->engine); |
|
219 #endif |
|
220 |
|
221 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data); |
|
222 |
|
223 if (r->p != NULL) BN_clear_free(r->p); |
|
224 if (r->q != NULL) BN_clear_free(r->q); |
|
225 if (r->g != NULL) BN_clear_free(r->g); |
|
226 if (r->pub_key != NULL) BN_clear_free(r->pub_key); |
|
227 if (r->priv_key != NULL) BN_clear_free(r->priv_key); |
|
228 if (r->kinv != NULL) BN_clear_free(r->kinv); |
|
229 if (r->r != NULL) BN_clear_free(r->r); |
|
230 OPENSSL_free(r); |
|
231 } |
|
232 |
|
233 EXPORT_C int DSA_up_ref(DSA *r) |
|
234 { |
|
235 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA); |
|
236 #ifdef REF_PRINT |
|
237 REF_PRINT("DSA",r); |
|
238 #endif |
|
239 #ifdef REF_CHECK |
|
240 if (i < 2) |
|
241 { |
|
242 fprintf(stderr, "DSA_up_ref, bad reference count\n"); |
|
243 abort(); |
|
244 } |
|
245 #endif |
|
246 return ((i > 1) ? 1 : 0); |
|
247 } |
|
248 |
|
249 EXPORT_C int DSA_size(const DSA *r) |
|
250 { |
|
251 int ret,i; |
|
252 ASN1_INTEGER bs; |
|
253 unsigned char buf[4]; /* 4 bytes looks really small. |
|
254 However, i2d_ASN1_INTEGER() will not look |
|
255 beyond the first byte, as long as the second |
|
256 parameter is NULL. */ |
|
257 |
|
258 i=BN_num_bits(r->q); |
|
259 bs.length=(i+7)/8; |
|
260 bs.data=buf; |
|
261 bs.type=V_ASN1_INTEGER; |
|
262 /* If the top bit is set the asn1 encoding is 1 larger. */ |
|
263 buf[0]=0xff; |
|
264 |
|
265 i=i2d_ASN1_INTEGER(&bs,NULL); |
|
266 i+=i; /* r and s */ |
|
267 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE); |
|
268 return(ret); |
|
269 } |
|
270 |
|
271 EXPORT_C int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
|
272 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) |
|
273 { |
|
274 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, argl, argp, |
|
275 new_func, dup_func, free_func); |
|
276 } |
|
277 |
|
278 EXPORT_C int DSA_set_ex_data(DSA *d, int idx, void *arg) |
|
279 { |
|
280 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg)); |
|
281 } |
|
282 |
|
283 EXPORT_C void *DSA_get_ex_data(DSA *d, int idx) |
|
284 { |
|
285 return(CRYPTO_get_ex_data(&d->ex_data,idx)); |
|
286 } |
|
287 |
|
288 #ifndef OPENSSL_NO_DH |
|
289 EXPORT_C DH *DSA_dup_DH(const DSA *r) |
|
290 { |
|
291 /* DSA has p, q, g, optional pub_key, optional priv_key. |
|
292 * DH has p, optional length, g, optional pub_key, optional priv_key. |
|
293 */ |
|
294 |
|
295 DH *ret = NULL; |
|
296 |
|
297 if (r == NULL) |
|
298 goto err; |
|
299 ret = DH_new(); |
|
300 if (ret == NULL) |
|
301 goto err; |
|
302 if (r->p != NULL) |
|
303 if ((ret->p = BN_dup(r->p)) == NULL) |
|
304 goto err; |
|
305 if (r->q != NULL) |
|
306 ret->length = BN_num_bits(r->q); |
|
307 if (r->g != NULL) |
|
308 if ((ret->g = BN_dup(r->g)) == NULL) |
|
309 goto err; |
|
310 if (r->pub_key != NULL) |
|
311 if ((ret->pub_key = BN_dup(r->pub_key)) == NULL) |
|
312 goto err; |
|
313 if (r->priv_key != NULL) |
|
314 if ((ret->priv_key = BN_dup(r->priv_key)) == NULL) |
|
315 goto err; |
|
316 |
|
317 return ret; |
|
318 |
|
319 err: |
|
320 if (ret != NULL) |
|
321 DH_free(ret); |
|
322 return NULL; |
|
323 } |
|
324 #endif |