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1 /* crypto/rsa/rsa_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 #include <stdio.h> | |
60 #include <openssl/crypto.h> | |
61 #include "cryptlib.h" | |
62 #include <openssl/lhash.h> | |
63 #include <openssl/bn.h> | |
64 #include <openssl/rsa.h> | |
65 #include <openssl/rand.h> | |
66 #ifndef OPENSSL_NO_ENGINE | |
67 #include <openssl/engine.h> | |
68 #endif | |
69 | |
70 const char RSA_version[]="RSA" OPENSSL_VERSION_PTEXT; | |
71 | |
72 static const RSA_METHOD *default_RSA_meth=NULL; | |
73 | |
74 RSA *RSA_new(void) | |
75 { | |
76 RSA *r=RSA_new_method(NULL); | |
77 | |
78 return r; | |
79 } | |
80 | |
81 void RSA_set_default_method(const RSA_METHOD *meth) | |
82 { | |
83 #ifdef OPENSSL_FIPS | |
84 if (FIPS_mode() && !(meth->flags & RSA_FLAG_FIPS_METHOD)) | |
85 { | |
86 RSAerr(RSA_F_RSA_SET_DEFAULT_METHOD, RSA_R_NON_FIPS_METHOD); | |
87 return; | |
88 } | |
89 #endif | |
90 default_RSA_meth = meth; | |
91 } | |
92 | |
93 const RSA_METHOD *RSA_get_default_method(void) | |
94 { | |
95 if (default_RSA_meth == NULL) | |
96 { | |
97 #ifdef RSA_NULL | |
98 default_RSA_meth=RSA_null_method(); | |
99 #else | |
100 #if 0 /* was: #ifdef RSAref */ | |
101 default_RSA_meth=RSA_PKCS1_RSAref(); | |
102 #else | |
103 default_RSA_meth=RSA_PKCS1_SSLeay(); | |
104 #endif | |
105 #endif | |
106 } | |
107 | |
108 return default_RSA_meth; | |
109 } | |
110 | |
111 const RSA_METHOD *RSA_get_method(const RSA *rsa) | |
112 { | |
113 return rsa->meth; | |
114 } | |
115 | |
116 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth) | |
117 { | |
118 /* NB: The caller is specifically setting a method, so it's not up to us | |
119 * to deal with which ENGINE it comes from. */ | |
120 const RSA_METHOD *mtmp; | |
121 #ifdef OPENSSL_FIPS | |
122 if (FIPS_mode() && !(meth->flags & RSA_FLAG_FIPS_METHOD)) | |
123 { | |
124 RSAerr(RSA_F_RSA_SET_METHOD, RSA_R_NON_FIPS_METHOD); | |
125 return 0; | |
126 } | |
127 #endif | |
128 mtmp = rsa->meth; | |
129 if (mtmp->finish) mtmp->finish(rsa); | |
130 #ifndef OPENSSL_NO_ENGINE | |
131 if (rsa->engine) | |
132 { | |
133 ENGINE_finish(rsa->engine); | |
134 rsa->engine = NULL; | |
135 } | |
136 #endif | |
137 rsa->meth = meth; | |
138 if (meth->init) meth->init(rsa); | |
139 return 1; | |
140 } | |
141 | |
142 RSA *RSA_new_method(ENGINE *engine) | |
143 { | |
144 RSA *ret; | |
145 | |
146 ret=(RSA *)OPENSSL_malloc(sizeof(RSA)); | |
147 if (ret == NULL) | |
148 { | |
149 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE); | |
150 return NULL; | |
151 } | |
152 | |
153 ret->meth = RSA_get_default_method(); | |
154 #ifndef OPENSSL_NO_ENGINE | |
155 if (engine) | |
156 { | |
157 if (!ENGINE_init(engine)) | |
158 { | |
159 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); | |
160 OPENSSL_free(ret); | |
161 return NULL; | |
162 } | |
163 ret->engine = engine; | |
164 } | |
165 else | |
166 ret->engine = ENGINE_get_default_RSA(); | |
167 if(ret->engine) | |
168 { | |
169 ret->meth = ENGINE_get_RSA(ret->engine); | |
170 if(!ret->meth) | |
171 { | |
172 RSAerr(RSA_F_RSA_NEW_METHOD, | |
173 ERR_R_ENGINE_LIB); | |
174 ENGINE_finish(ret->engine); | |
175 OPENSSL_free(ret); | |
176 return NULL; | |
177 } | |
178 } | |
179 #endif | |
180 #ifdef OPENSSL_FIPS | |
181 if (FIPS_mode() && !(ret->meth->flags & RSA_FLAG_FIPS_METHOD)) | |
182 { | |
183 RSAerr(RSA_F_RSA_NEW_METHOD, RSA_R_NON_FIPS_METHOD); | |
184 #ifndef OPENSSL_NO_ENGINE | |
185 if (ret->engine) | |
186 ENGINE_finish(ret->engine); | |
187 #endif | |
188 OPENSSL_free(ret); | |
189 return NULL; | |
190 } | |
191 #endif | |
192 | |
193 ret->pad=0; | |
194 ret->version=0; | |
195 ret->n=NULL; | |
196 ret->e=NULL; | |
197 ret->d=NULL; | |
198 ret->p=NULL; | |
199 ret->q=NULL; | |
200 ret->dmp1=NULL; | |
201 ret->dmq1=NULL; | |
202 ret->iqmp=NULL; | |
203 ret->references=1; | |
204 ret->_method_mod_n=NULL; | |
205 ret->_method_mod_p=NULL; | |
206 ret->_method_mod_q=NULL; | |
207 ret->blinding=NULL; | |
208 ret->mt_blinding=NULL; | |
209 ret->bignum_data=NULL; | |
210 ret->flags=ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; | |
211 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) | |
212 { | |
213 #ifndef OPENSSL_NO_ENGINE | |
214 if (ret->engine) | |
215 ENGINE_finish(ret->engine); | |
216 #endif | |
217 OPENSSL_free(ret); | |
218 return(NULL); | |
219 } | |
220 | |
221 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) | |
222 { | |
223 #ifndef OPENSSL_NO_ENGINE | |
224 if (ret->engine) | |
225 ENGINE_finish(ret->engine); | |
226 #endif | |
227 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); | |
228 OPENSSL_free(ret); | |
229 ret=NULL; | |
230 } | |
231 return(ret); | |
232 } | |
233 | |
234 void RSA_free(RSA *r) | |
235 { | |
236 int i; | |
237 | |
238 if (r == NULL) return; | |
239 | |
240 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA); | |
241 #ifdef REF_PRINT | |
242 REF_PRINT("RSA",r); | |
243 #endif | |
244 if (i > 0) return; | |
245 #ifdef REF_CHECK | |
246 if (i < 0) | |
247 { | |
248 fprintf(stderr,"RSA_free, bad reference count\n"); | |
249 abort(); | |
250 } | |
251 #endif | |
252 | |
253 if (r->meth->finish) | |
254 r->meth->finish(r); | |
255 #ifndef OPENSSL_NO_ENGINE | |
256 if (r->engine) | |
257 ENGINE_finish(r->engine); | |
258 #endif | |
259 | |
260 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); | |
261 | |
262 if (r->n != NULL) BN_clear_free(r->n); | |
263 if (r->e != NULL) BN_clear_free(r->e); | |
264 if (r->d != NULL) BN_clear_free(r->d); | |
265 if (r->p != NULL) BN_clear_free(r->p); | |
266 if (r->q != NULL) BN_clear_free(r->q); | |
267 if (r->dmp1 != NULL) BN_clear_free(r->dmp1); | |
268 if (r->dmq1 != NULL) BN_clear_free(r->dmq1); | |
269 if (r->iqmp != NULL) BN_clear_free(r->iqmp); | |
270 if (r->blinding != NULL) BN_BLINDING_free(r->blinding); | |
271 if (r->mt_blinding != NULL) BN_BLINDING_free(r->mt_blinding); | |
272 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data); | |
273 OPENSSL_free(r); | |
274 } | |
275 | |
276 int RSA_up_ref(RSA *r) | |
277 { | |
278 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); | |
279 #ifdef REF_PRINT | |
280 REF_PRINT("RSA",r); | |
281 #endif | |
282 #ifdef REF_CHECK | |
283 if (i < 2) | |
284 { | |
285 fprintf(stderr, "RSA_up_ref, bad reference count\n"); | |
286 abort(); | |
287 } | |
288 #endif | |
289 return ((i > 1) ? 1 : 0); | |
290 } | |
291 | |
292 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, | |
293 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) | |
294 { | |
295 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp, | |
296 new_func, dup_func, free_func); | |
297 } | |
298 | |
299 int RSA_set_ex_data(RSA *r, int idx, void *arg) | |
300 { | |
301 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg)); | |
302 } | |
303 | |
304 void *RSA_get_ex_data(const RSA *r, int idx) | |
305 { | |
306 return(CRYPTO_get_ex_data(&r->ex_data,idx)); | |
307 } | |
308 | |
309 int RSA_flags(const RSA *r) | |
310 { | |
311 return((r == NULL)?0:r->meth->flags); | |
312 } | |
313 | |
314 int RSA_memory_lock(RSA *r) | |
315 { | |
316 int i,j,k,off; | |
317 char *p; | |
318 BIGNUM *bn,**t[6],*b; | |
319 BN_ULONG *ul; | |
320 | |
321 if (r->d == NULL) return(1); | |
322 t[0]= &r->d; | |
323 t[1]= &r->p; | |
324 t[2]= &r->q; | |
325 t[3]= &r->dmp1; | |
326 t[4]= &r->dmq1; | |
327 t[5]= &r->iqmp; | |
328 k=sizeof(BIGNUM)*6; | |
329 off=k/sizeof(BN_ULONG)+1; | |
330 j=1; | |
331 for (i=0; i<6; i++) | |
332 j+= (*t[i])->top; | |
333 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL) | |
334 { | |
335 RSAerr(RSA_F_RSA_MEMORY_LOCK,ERR_R_MALLOC_FAILURE); | |
336 return(0); | |
337 } | |
338 bn=(BIGNUM *)p; | |
339 ul=(BN_ULONG *)&(p[off]); | |
340 for (i=0; i<6; i++) | |
341 { | |
342 b= *(t[i]); | |
343 *(t[i])= &(bn[i]); | |
344 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM)); | |
345 bn[i].flags=BN_FLG_STATIC_DATA; | |
346 bn[i].d=ul; | |
347 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top); | |
348 ul+=b->top; | |
349 BN_clear_free(b); | |
350 } | |
351 | |
352 /* I should fix this so it can still be done */ | |
353 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC); | |
354 | |
355 r->bignum_data=p; | |
356 return(1); | |
357 } | |
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