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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
70const char RSA_version[]="RSA" OPENSSL_VERSION_PTEXT;
71
72static const RSA_METHOD *default_RSA_meth=NULL;
73
74RSA *RSA_new(void)
75 {
76 RSA *r=RSA_new_method(NULL);
77
78 return r;
79 }
80
81void 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
93const 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
111const RSA_METHOD *RSA_get_method(const RSA *rsa)
112 {
113 return rsa->meth;
114 }
115
116int 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
142RSA *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;
211 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
212 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
213 {
214#ifndef OPENSSL_NO_ENGINE
215 if (ret->engine)
216 ENGINE_finish(ret->engine);
217#endif
218 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
219 OPENSSL_free(ret);
220 ret=NULL;
221 }
222 return(ret);
223 }
224
225void RSA_free(RSA *r)
226 {
227 int i;
228
229 if (r == NULL) return;
230
231 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
232#ifdef REF_PRINT
233 REF_PRINT("RSA",r);
234#endif
235 if (i > 0) return;
236#ifdef REF_CHECK
237 if (i < 0)
238 {
239 fprintf(stderr,"RSA_free, bad reference count\n");
240 abort();
241 }
242#endif
243
244 if (r->meth->finish)
245 r->meth->finish(r);
246#ifndef OPENSSL_NO_ENGINE
247 if (r->engine)
248 ENGINE_finish(r->engine);
249#endif
250
251 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
252
253 if (r->n != NULL) BN_clear_free(r->n);
254 if (r->e != NULL) BN_clear_free(r->e);
255 if (r->d != NULL) BN_clear_free(r->d);
256 if (r->p != NULL) BN_clear_free(r->p);
257 if (r->q != NULL) BN_clear_free(r->q);
258 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
259 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
260 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
261 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
262 if (r->mt_blinding != NULL) BN_BLINDING_free(r->mt_blinding);
263 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
264 OPENSSL_free(r);
265 }
266
267int RSA_up_ref(RSA *r)
268 {
269 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
270#ifdef REF_PRINT
271 REF_PRINT("RSA",r);
272#endif
273#ifdef REF_CHECK
274 if (i < 2)
275 {
276 fprintf(stderr, "RSA_up_ref, bad reference count\n");
277 abort();
278 }
279#endif
280 return ((i > 1) ? 1 : 0);
281 }
282
283int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
284 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
285 {
286 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
287 new_func, dup_func, free_func);
288 }
289
290int RSA_set_ex_data(RSA *r, int idx, void *arg)
291 {
292 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
293 }
294
295void *RSA_get_ex_data(const RSA *r, int idx)
296 {
297 return(CRYPTO_get_ex_data(&r->ex_data,idx));
298 }
299
300int RSA_flags(const RSA *r)
301 {
302 return((r == NULL)?0:r->meth->flags);
303 }
304
305int RSA_memory_lock(RSA *r)
306 {
307 int i,j,k,off;
308 char *p;
309 BIGNUM *bn,**t[6],*b;
310 BN_ULONG *ul;
311
312 if (r->d == NULL) return(1);
313 t[0]= &r->d;
314 t[1]= &r->p;
315 t[2]= &r->q;
316 t[3]= &r->dmp1;
317 t[4]= &r->dmq1;
318 t[5]= &r->iqmp;
319 k=sizeof(BIGNUM)*6;
320 off=k/sizeof(BN_ULONG)+1;
321 j=1;
322 for (i=0; i<6; i++)
323 j+= (*t[i])->top;
324 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
325 {
326 RSAerr(RSA_F_RSA_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
327 return(0);
328 }
329 bn=(BIGNUM *)p;
330 ul=(BN_ULONG *)&(p[off]);
331 for (i=0; i<6; i++)
332 {
333 b= *(t[i]);
334 *(t[i])= &(bn[i]);
335 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
336 bn[i].flags=BN_FLG_STATIC_DATA;
337 bn[i].d=ul;
338 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
339 ul+=b->top;
340 BN_clear_free(b);
341 }
342
343 /* I should fix this so it can still be done */
344 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);
345
346 r->bignum_data=p;
347 return(1);
348 }
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