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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/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 default_RSA_meth = meth;
84 }
85
86const RSA_METHOD *RSA_get_default_method(void)
87 {
88 if (default_RSA_meth == NULL)
89 {
90#ifdef RSA_NULL
91 default_RSA_meth=RSA_null_method();
92#else
93#if 0 /* was: #ifdef RSAref */
94 default_RSA_meth=RSA_PKCS1_RSAref();
95#else
96 default_RSA_meth=RSA_PKCS1_SSLeay();
97#endif
98#endif
99 }
100
101 return default_RSA_meth;
102 }
103
104const RSA_METHOD *RSA_get_method(const RSA *rsa)
105 {
106 return rsa->meth;
107 }
108
109int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
110 {
111 /* NB: The caller is specifically setting a method, so it's not up to us
112 * to deal with which ENGINE it comes from. */
113 const RSA_METHOD *mtmp;
114 mtmp = rsa->meth;
115 if (mtmp->finish) mtmp->finish(rsa);
116#ifndef OPENSSL_NO_ENGINE
117 if (rsa->engine)
118 {
119 ENGINE_finish(rsa->engine);
120 rsa->engine = NULL;
121 }
122#endif
123 rsa->meth = meth;
124 if (meth->init) meth->init(rsa);
125 return 1;
126 }
127
128RSA *RSA_new_method(ENGINE *engine)
129 {
130 RSA *ret;
131
132 ret=(RSA *)OPENSSL_malloc(sizeof(RSA));
133 if (ret == NULL)
134 {
135 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
136 return NULL;
137 }
138
139 ret->meth = RSA_get_default_method();
140#ifndef OPENSSL_NO_ENGINE
141 if (engine)
142 {
143 if (!ENGINE_init(engine))
144 {
145 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
146 OPENSSL_free(ret);
147 return NULL;
148 }
149 ret->engine = engine;
150 }
151 else
152 ret->engine = ENGINE_get_default_RSA();
153 if(ret->engine)
154 {
155 ret->meth = ENGINE_get_RSA(ret->engine);
156 if(!ret->meth)
157 {
158 RSAerr(RSA_F_RSA_NEW_METHOD,
159 ERR_R_ENGINE_LIB);
160 ENGINE_finish(ret->engine);
161 OPENSSL_free(ret);
162 return NULL;
163 }
164 }
165#endif
166
167 ret->pad=0;
168 ret->version=0;
169 ret->n=NULL;
170 ret->e=NULL;
171 ret->d=NULL;
172 ret->p=NULL;
173 ret->q=NULL;
174 ret->dmp1=NULL;
175 ret->dmq1=NULL;
176 ret->iqmp=NULL;
177 ret->references=1;
178 ret->_method_mod_n=NULL;
179 ret->_method_mod_p=NULL;
180 ret->_method_mod_q=NULL;
181 ret->blinding=NULL;
182 ret->mt_blinding=NULL;
183 ret->bignum_data=NULL;
184 ret->flags=ret->meth->flags;
185 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data))
186 {
187#ifndef OPENSSL_NO_ENGINE
188 if (ret->engine)
189 ENGINE_finish(ret->engine);
190#endif
191 OPENSSL_free(ret);
192 return(NULL);
193 }
194
195 if ((ret->meth->init != NULL) && !ret->meth->init(ret))
196 {
197#ifndef OPENSSL_NO_ENGINE
198 if (ret->engine)
199 ENGINE_finish(ret->engine);
200#endif
201 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
202 OPENSSL_free(ret);
203 ret=NULL;
204 }
205 return(ret);
206 }
207
208void RSA_free(RSA *r)
209 {
210 int i;
211
212 if (r == NULL) return;
213
214 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA);
215#ifdef REF_PRINT
216 REF_PRINT("RSA",r);
217#endif
218 if (i > 0) return;
219#ifdef REF_CHECK
220 if (i < 0)
221 {
222 fprintf(stderr,"RSA_free, bad reference count\n");
223 abort();
224 }
225#endif
226
227 if (r->meth->finish)
228 r->meth->finish(r);
229#ifndef OPENSSL_NO_ENGINE
230 if (r->engine)
231 ENGINE_finish(r->engine);
232#endif
233
234 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
235
236 if (r->n != NULL) BN_clear_free(r->n);
237 if (r->e != NULL) BN_clear_free(r->e);
238 if (r->d != NULL) BN_clear_free(r->d);
239 if (r->p != NULL) BN_clear_free(r->p);
240 if (r->q != NULL) BN_clear_free(r->q);
241 if (r->dmp1 != NULL) BN_clear_free(r->dmp1);
242 if (r->dmq1 != NULL) BN_clear_free(r->dmq1);
243 if (r->iqmp != NULL) BN_clear_free(r->iqmp);
244 if (r->blinding != NULL) BN_BLINDING_free(r->blinding);
245 if (r->mt_blinding != NULL) BN_BLINDING_free(r->mt_blinding);
246 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data);
247 OPENSSL_free(r);
248 }
249
250int RSA_up_ref(RSA *r)
251 {
252 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
253#ifdef REF_PRINT
254 REF_PRINT("RSA",r);
255#endif
256#ifdef REF_CHECK
257 if (i < 2)
258 {
259 fprintf(stderr, "RSA_up_ref, bad reference count\n");
260 abort();
261 }
262#endif
263 return ((i > 1) ? 1 : 0);
264 }
265
266int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
267 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
268 {
269 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
270 new_func, dup_func, free_func);
271 }
272
273int RSA_set_ex_data(RSA *r, int idx, void *arg)
274 {
275 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
276 }
277
278void *RSA_get_ex_data(const RSA *r, int idx)
279 {
280 return(CRYPTO_get_ex_data(&r->ex_data,idx));
281 }
282
283int RSA_size(const RSA *r)
284 {
285 return(BN_num_bytes(r->n));
286 }
287
288int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
289 RSA *rsa, int padding)
290 {
291 return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
292 }
293
294int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
295 RSA *rsa, int padding)
296 {
297 return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
298 }
299
300int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
301 RSA *rsa, int padding)
302 {
303 return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
304 }
305
306int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
307 RSA *rsa, int padding)
308 {
309 return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
310 }
311
312int RSA_flags(const RSA *r)
313 {
314 return((r == NULL)?0:r->meth->flags);
315 }
316
317void RSA_blinding_off(RSA *rsa)
318 {
319 if (rsa->blinding != NULL)
320 {
321 BN_BLINDING_free(rsa->blinding);
322 rsa->blinding=NULL;
323 }
324 rsa->flags &= ~RSA_FLAG_BLINDING;
325 rsa->flags |= RSA_FLAG_NO_BLINDING;
326 }
327
328int RSA_blinding_on(RSA *rsa, BN_CTX *ctx)
329 {
330 int ret=0;
331
332 if (rsa->blinding != NULL)
333 RSA_blinding_off(rsa);
334
335 rsa->blinding = RSA_setup_blinding(rsa, ctx);
336 if (rsa->blinding == NULL)
337 goto err;
338
339 rsa->flags |= RSA_FLAG_BLINDING;
340 rsa->flags &= ~RSA_FLAG_NO_BLINDING;
341 ret=1;
342err:
343 return(ret);
344 }
345
346static BIGNUM *rsa_get_public_exp(const BIGNUM *d, const BIGNUM *p,
347 const BIGNUM *q, BN_CTX *ctx)
348{
349 BIGNUM *ret = NULL, *r0, *r1, *r2;
350
351 if (d == NULL || p == NULL || q == NULL)
352 return NULL;
353
354 BN_CTX_start(ctx);
355 r0 = BN_CTX_get(ctx);
356 r1 = BN_CTX_get(ctx);
357 r2 = BN_CTX_get(ctx);
358 if (r2 == NULL)
359 goto err;
360
361 if (!BN_sub(r1, p, BN_value_one())) goto err;
362 if (!BN_sub(r2, q, BN_value_one())) goto err;
363 if (!BN_mul(r0, r1, r2, ctx)) goto err;
364
365 ret = BN_mod_inverse(NULL, d, r0, ctx);
366err:
367 BN_CTX_end(ctx);
368 return ret;
369}
370
371BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx)
372{
373 BIGNUM local_n;
374 BIGNUM *e,*n;
375 BN_CTX *ctx;
376 BN_BLINDING *ret = NULL;
377
378 if (in_ctx == NULL)
379 {
380 if ((ctx = BN_CTX_new()) == NULL) return 0;
381 }
382 else
383 ctx = in_ctx;
384
385 BN_CTX_start(ctx);
386 e = BN_CTX_get(ctx);
387 if (e == NULL)
388 {
389 RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
390 goto err;
391 }
392
393 if (rsa->e == NULL)
394 {
395 e = rsa_get_public_exp(rsa->d, rsa->p, rsa->q, ctx);
396 if (e == NULL)
397 {
398 RSAerr(RSA_F_RSA_SETUP_BLINDING, RSA_R_NO_PUBLIC_EXPONENT);
399 goto err;
400 }
401 }
402 else
403 e = rsa->e;
404
405
406 if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL)
407 {
408 /* if PRNG is not properly seeded, resort to secret
409 * exponent as unpredictable seed */
410 RAND_add(rsa->d->d, rsa->d->dmax * sizeof rsa->d->d[0], 0.0);
411 }
412
413 if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME))
414 {
415 /* Set BN_FLG_CONSTTIME flag */
416 n = &local_n;
417 BN_with_flags(n, rsa->n, BN_FLG_CONSTTIME);
418 }
419 else
420 n = rsa->n;
421
422 ret = BN_BLINDING_create_param(NULL, e, n, ctx,
423 rsa->meth->bn_mod_exp, rsa->_method_mod_n);
424 if (ret == NULL)
425 {
426 RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_BN_LIB);
427 goto err;
428 }
429 CRYPTO_THREADID_current(BN_BLINDING_thread_id(ret));
430err:
431 BN_CTX_end(ctx);
432 if (in_ctx == NULL)
433 BN_CTX_free(ctx);
434 if(rsa->e == NULL)
435 BN_free(e);
436
437 return ret;
438}
439
440int RSA_memory_lock(RSA *r)
441 {
442 int i,j,k,off;
443 char *p;
444 BIGNUM *bn,**t[6],*b;
445 BN_ULONG *ul;
446
447 if (r->d == NULL) return(1);
448 t[0]= &r->d;
449 t[1]= &r->p;
450 t[2]= &r->q;
451 t[3]= &r->dmp1;
452 t[4]= &r->dmq1;
453 t[5]= &r->iqmp;
454 k=sizeof(BIGNUM)*6;
455 off=k/sizeof(BN_ULONG)+1;
456 j=1;
457 for (i=0; i<6; i++)
458 j+= (*t[i])->top;
459 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL)
460 {
461 RSAerr(RSA_F_RSA_MEMORY_LOCK,ERR_R_MALLOC_FAILURE);
462 return(0);
463 }
464 bn=(BIGNUM *)p;
465 ul=(BN_ULONG *)&(p[off]);
466 for (i=0; i<6; i++)
467 {
468 b= *(t[i]);
469 *(t[i])= &(bn[i]);
470 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM));
471 bn[i].flags=BN_FLG_STATIC_DATA;
472 bn[i].d=ul;
473 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top);
474 ul+=b->top;
475 BN_clear_free(b);
476 }
477
478 /* I should fix this so it can still be done */
479 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC);
480
481 r->bignum_data=p;
482 return(1);
483 }
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