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 #ifdef OPENSSL_FIPS
71 #include <openssl/fips.h>
72 #endif
73
74 const char RSA_version[]="RSA" OPENSSL_VERSION_PTEXT;
75
76 static const RSA_METHOD *default_RSA_meth=NULL;
77
78 RSA *RSA_new(void)
79 {
80 RSA *r=RSA_new_method(NULL);
81
82 return r;
83 }
84
85 void RSA_set_default_method(const RSA_METHOD *meth)
86 {
87 default_RSA_meth = meth;
88 }
89
90 const RSA_METHOD *RSA_get_default_method(void)
91 {
92 if (default_RSA_meth == NULL)
93 {
94 #ifdef OPENSSL_FIPS
95 if (FIPS_mode())
96 return FIPS_rsa_pkcs1_ssleay();
97 else
98 return RSA_PKCS1_SSLeay();
99 #else
100 #ifdef RSA_NULL
101 default_RSA_meth=RSA_null_method();
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 mtmp = rsa->meth;
122 if (mtmp->finish) mtmp->finish(rsa);
123 #ifndef OPENSSL_NO_ENGINE
124 if (rsa->engine)
125 {
126 ENGINE_finish(rsa->engine);
127 rsa->engine = NULL;
128 }
129 #endif
130 rsa->meth = meth;
131 if (meth->init) meth->init(rsa);
132 return 1;
133 }
134
135 RSA *RSA_new_method(ENGINE *engine)
136 {
137 RSA *ret;
138
139 ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
140 if (ret == NULL)
141 {
142 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
143 return NULL;
144 }
145
146 ret->meth = RSA_get_default_method();
147 #ifndef OPENSSL_NO_ENGINE
148 if (engine)
149 {
150 if (!ENGINE_init(engine))
151 {
152 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
153 OPENSSL_free(ret);
154 return NULL;
155 }
156 ret->engine = engine;
157 }
158 else
159 ret->engine = ENGINE_get_default_RSA();
160 if(ret->engine)
161 {
162 ret->meth = ENGINE_get_RSA(ret->engine);
163 if(!ret->meth)
164 {
165 RSAerr(RSA_F_RSA_NEW_METHOD,
166 ERR_R_ENGINE_LIB);
167 ENGINE_finish(ret->engine);
168 OPENSSL_free(ret);
169 return NULL;
170 }
171 }
172 #endif
173
174 ret->pad=0;
175 ret->version=0;
176 ret->n=NULL;
177 ret->e=NULL;
178 ret->d=NULL;
179 ret->p=NULL;
180 ret->q=NULL;
181 ret->dmp1=NULL;
182 ret->dmq1=NULL;
183 ret->iqmp=NULL;
184 ret->references=1;
185 ret->_method_mod_n=NULL;
186 ret->_method_mod_p=NULL;
187 ret->_method_mod_q=NULL;
188 ret->blinding=NULL;
189 ret->mt_blinding=NULL;
190 ret->bignum_data=NULL;
191 ret->flags=ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
192 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data))
193 {
194 #ifndef OPENSSL_NO_ENGINE
195 if (ret->engine)
196 ENGINE_finish(ret->engine);
197 #endif
198 OPENSSL_free(ret);
199 return(NULL);
200 }
201
202 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
203 {
204 #ifndef OPENSSL_NO_ENGINE
205 if (ret->engine)
206 ENGINE_finish(ret->engine);
207 #endif
208 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
209 OPENSSL_free(ret);
210 ret=NULL;
211 }
212 return(ret);
213 }
214
215 void RSA_free(RSA *r)
216 {
217 int i;
218
219 if (r == NULL) return;
220
221 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
222 #ifdef REF_PRINT
223 REF_PRINT("RSA",r);
224 #endif
225 if (i > 0) return;
226 #ifdef REF_CHECK
227 if (i < 0)
228 {
229 fprintf(stderr,"RSA_free, bad reference count\n");
230 abort();
231 }
232 #endif
233
234 if (r->meth->finish)
235 r->meth->finish(r);
236 #ifndef OPENSSL_NO_ENGINE
237 if (r->engine)
238 ENGINE_finish(r->engine);
239 #endif
240
241 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
242
243 if (r->n != NULL) BN_clear_free(r->n);
244 if (r->e != NULL) BN_clear_free(r->e);
245 if (r->d != NULL) BN_clear_free(r->d);
246 if (r->p != NULL) BN_clear_free(r->p);
247 if (r->q != NULL) BN_clear_free(r->q);
248 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
249 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
250 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
251 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
252 if (r->mt_blinding != NULL) BN_BLINDING_free(r->mt_blinding);
253 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
254 OPENSSL_free(r);
255 }
256
257 int RSA_up_ref(RSA *r)
258 {
259 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
260 #ifdef REF_PRINT
261 REF_PRINT("RSA",r);
262 #endif
263 #ifdef REF_CHECK
264 if (i < 2)
265 {
266 fprintf(stderr, "RSA_up_ref, bad reference count\n");
267 abort();
268 }
269 #endif
270 return ((i > 1) ? 1 : 0);
271 }
272
273 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
274 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
275 {
276 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
277 new_func, dup_func, free_func);
278 }
279
280 int RSA_set_ex_data(RSA *r, int idx, void *arg)
281 {
282 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
283 }
284
285 void *RSA_get_ex_data(const RSA *r, int idx)
286 {
287 return(CRYPTO_get_ex_data(&r->ex_data,idx));
288 }
289
290 int RSA_memory_lock(RSA *r)
291 {
292 int i,j,k,off;
293 char *p;
294 BIGNUM *bn,**t[6],*b;
295 BN_ULONG *ul;
296
297 if (r->d == NULL) return(1);
298 t[0]= &r->d;
299 t[1]= &r->p;
300 t[2]= &r->q;
301 t[3]= &r->dmp1;
302 t[4]= &r->dmq1;
303 t[5]= &r->iqmp;
304 k=sizeof(BIGNUM)*6;
305 off=k/sizeof(BN_ULONG)+1;
306 j=1;
307 for (i=0; i<6; i++)
308 j+= (*t[i])->top;
309 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
310 {
311 RSAerr(RSA_F_RSA_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
312 return(0);
313 }
314 bn=(BIGNUM *)p;
315 ul=(BN_ULONG *)&(p[off]);
316 for (i=0; i<6; i++)
317 {
318 b= *(t[i]);
319 *(t[i])= &(bn[i]);
320 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
321 bn[i].flags=BN_FLG_STATIC_DATA;
322 bn[i].d=ul;
323 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
324 ul+=b->top;
325 BN_clear_free(b);
326 }
327
328 /* I should fix this so it can still be done */
329 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);
330
331 r->bignum_data=p;
332 return(1);
333 }