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authorcvs2svn <admin@example.com>2002-09-26 11:41:23 +0000
committercvs2svn <admin@example.com>2002-09-26 11:41:23 +0000
commit3b5c5bfc7cdfc65c13061b8267f92cfc3c3d9f62 (patch)
tree65b4d250c712e6725dca113b306ae73f896475e1 /src/lib/libcrypto/rsa/rsa_lib.c
parentaf61e3f7dbe1fd8b363339d8ec5d6aec5f400ce3 (diff)
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This commit was manufactured by cvs2git to create tag 'OPENBSD_3_2_BASE'.OPENBSD_3_2_BASE
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diff --git a/src/lib/libcrypto/rsa/rsa_lib.c b/src/lib/libcrypto/rsa/rsa_lib.c
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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/engine.h>
66
67const char *RSA_version="RSA" OPENSSL_VERSION_PTEXT;
68
69static const RSA_METHOD *default_RSA_meth=NULL;
70
71RSA *RSA_new(void)
72 {
73 return(RSA_new_method(NULL));
74 }
75
76void RSA_set_default_method(const RSA_METHOD *meth)
77 {
78 default_RSA_meth = meth;
79 }
80
81const RSA_METHOD *RSA_get_default_method(void)
82 {
83 if (default_RSA_meth == NULL)
84 {
85#ifdef RSA_NULL
86 default_RSA_meth=RSA_null_method();
87#else
88#if 0 /* was: #ifdef RSAref */
89 default_RSA_meth=RSA_PKCS1_RSAref();
90#else
91 default_RSA_meth=RSA_PKCS1_SSLeay();
92#endif
93#endif
94 }
95
96 return default_RSA_meth;
97 }
98
99const RSA_METHOD *RSA_get_method(const RSA *rsa)
100 {
101 return rsa->meth;
102 }
103
104int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
105 {
106 /* NB: The caller is specifically setting a method, so it's not up to us
107 * to deal with which ENGINE it comes from. */
108 const RSA_METHOD *mtmp;
109 mtmp = rsa->meth;
110 if (mtmp->finish) mtmp->finish(rsa);
111 if (rsa->engine)
112 {
113 ENGINE_finish(rsa->engine);
114 rsa->engine = NULL;
115 }
116 rsa->meth = meth;
117 if (meth->init) meth->init(rsa);
118 return 1;
119 }
120
121RSA *RSA_new_method(ENGINE *engine)
122 {
123 RSA *ret;
124
125 ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
126 if (ret == NULL)
127 {
128 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
129 return NULL;
130 }
131
132 ret->meth = RSA_get_default_method();
133 if (engine)
134 {
135 if (!ENGINE_init(engine))
136 {
137 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
138 OPENSSL_free(ret);
139 return NULL;
140 }
141 ret->engine = engine;
142 }
143 else
144 ret->engine = ENGINE_get_default_RSA();
145 if(ret->engine)
146 {
147 ret->meth = ENGINE_get_RSA(ret->engine);
148 if(!ret->meth)
149 {
150 RSAerr(RSA_F_RSA_NEW_METHOD,
151 ERR_R_ENGINE_LIB);
152 ENGINE_finish(ret->engine);
153 OPENSSL_free(ret);
154 return NULL;
155 }
156 }
157
158 ret->pad=0;
159 ret->version=0;
160 ret->n=NULL;
161 ret->e=NULL;
162 ret->d=NULL;
163 ret->p=NULL;
164 ret->q=NULL;
165 ret->dmp1=NULL;
166 ret->dmq1=NULL;
167 ret->iqmp=NULL;
168 ret->references=1;
169 ret->_method_mod_n=NULL;
170 ret->_method_mod_p=NULL;
171 ret->_method_mod_q=NULL;
172 ret->blinding=NULL;
173 ret->bignum_data=NULL;
174 ret->flags=ret->meth->flags;
175 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
176 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
177 {
178 if (ret->engine)
179 ENGINE_finish(ret->engine);
180 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
181 OPENSSL_free(ret);
182 ret=NULL;
183 }
184 return(ret);
185 }
186
187void RSA_free(RSA *r)
188 {
189 int i;
190
191 if (r == NULL) return;
192
193 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
194#ifdef REF_PRINT
195 REF_PRINT("RSA",r);
196#endif
197 if (i > 0) return;
198#ifdef REF_CHECK
199 if (i < 0)
200 {
201 fprintf(stderr,"RSA_free, bad reference count\n");
202 abort();
203 }
204#endif
205
206 if (r->meth->finish)
207 r->meth->finish(r);
208 if (r->engine)
209 ENGINE_finish(r->engine);
210
211 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
212
213 if (r->n != NULL) BN_clear_free(r->n);
214 if (r->e != NULL) BN_clear_free(r->e);
215 if (r->d != NULL) BN_clear_free(r->d);
216 if (r->p != NULL) BN_clear_free(r->p);
217 if (r->q != NULL) BN_clear_free(r->q);
218 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
219 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
220 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
221 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
222 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
223 OPENSSL_free(r);
224 }
225
226int RSA_up_ref(RSA *r)
227 {
228 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
229#ifdef REF_PRINT
230 REF_PRINT("RSA",r);
231#endif
232#ifdef REF_CHECK
233 if (i < 2)
234 {
235 fprintf(stderr, "RSA_up_ref, bad reference count\n");
236 abort();
237 }
238#endif
239 return ((i > 1) ? 1 : 0);
240 }
241
242int RSA_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 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
246 new_func, dup_func, free_func);
247 }
248
249int RSA_set_ex_data(RSA *r, int idx, void *arg)
250 {
251 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
252 }
253
254void *RSA_get_ex_data(const RSA *r, int idx)
255 {
256 return(CRYPTO_get_ex_data(&r->ex_data,idx));
257 }
258
259int RSA_size(const RSA *r)
260 {
261 return(BN_num_bytes(r->n));
262 }
263
264int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
265 RSA *rsa, int padding)
266 {
267 return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
268 }
269
270int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
271 RSA *rsa, int padding)
272 {
273 return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
274 }
275
276int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
277 RSA *rsa, int padding)
278 {
279 return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
280 }
281
282int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
283 RSA *rsa, int padding)
284 {
285 return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
286 }
287
288int RSA_flags(const RSA *r)
289 {
290 return((r == NULL)?0:r->meth->flags);
291 }
292
293void RSA_blinding_off(RSA *rsa)
294 {
295 if (rsa->blinding != NULL)
296 {
297 BN_BLINDING_free(rsa->blinding);
298 rsa->blinding=NULL;
299 }
300 rsa->flags&= ~RSA_FLAG_BLINDING;
301 }
302
303int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
304 {
305 BIGNUM *A,*Ai;
306 BN_CTX *ctx;
307 int ret=0;
308
309 if (p_ctx == NULL)
310 {
311 if ((ctx=BN_CTX_new()) == NULL) goto err;
312 }
313 else
314 ctx=p_ctx;
315
316 if (rsa->blinding != NULL)
317 BN_BLINDING_free(rsa->blinding);
318
319 BN_CTX_start(ctx);
320 A = BN_CTX_get(ctx);
321 if (!BN_rand_range(A,rsa->n)) goto err;
322 if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
323
324 if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
325 goto err;
326 rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n);
327 rsa->flags|=RSA_FLAG_BLINDING;
328 BN_free(Ai);
329 ret=1;
330err:
331 BN_CTX_end(ctx);
332 if (ctx != p_ctx) BN_CTX_free(ctx);
333 return(ret);
334 }
335
336int RSA_memory_lock(RSA *r)
337 {
338 int i,j,k,off;
339 char *p;
340 BIGNUM *bn,**t[6],*b;
341 BN_ULONG *ul;
342
343 if (r->d == NULL) return(1);
344 t[0]= &r->d;
345 t[1]= &r->p;
346 t[2]= &r->q;
347 t[3]= &r->dmp1;
348 t[4]= &r->dmq1;
349 t[5]= &r->iqmp;
350 k=sizeof(BIGNUM)*6;
351 off=k/sizeof(BN_ULONG)+1;
352 j=1;
353 for (i=0; i<6; i++)
354 j+= (*t[i])->top;
355 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
356 {
357 RSAerr(RSA_F_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
358 return(0);
359 }
360 bn=(BIGNUM *)p;
361 ul=(BN_ULONG *)&(p[off]);
362 for (i=0; i<6; i++)
363 {
364 b= *(t[i]);
365 *(t[i])= &(bn[i]);
366 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
367 bn[i].flags=BN_FLG_STATIC_DATA;
368 bn[i].d=ul;
369 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
370 ul+=b->top;
371 BN_clear_free(b);
372 }
373
374 /* I should fix this so it can still be done */
375 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);
376
377 r->bignum_data=p;
378 return(1);
379 }