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58964a49 RE |
1 | /* crypto/rsa/rsa_eay.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 | */ | |
46a64376 | 58 | /* ==================================================================== |
675f605d | 59 | * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. |
46a64376 BM |
60 | * |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
58964a49 RE |
111 | |
112 | #include <stdio.h> | |
113 | #include "cryptlib.h" | |
ec577822 BM |
114 | #include <openssl/bn.h> |
115 | #include <openssl/rsa.h> | |
116 | #include <openssl/rand.h> | |
58964a49 | 117 | |
c1cd88a0 DSH |
118 | #ifndef RSA_NULL |
119 | ||
29c1f061 | 120 | static int RSA_eay_public_encrypt(int flen, const unsigned char *from, |
58964a49 | 121 | unsigned char *to, RSA *rsa,int padding); |
29c1f061 | 122 | static int RSA_eay_private_encrypt(int flen, const unsigned char *from, |
58964a49 | 123 | unsigned char *to, RSA *rsa,int padding); |
29c1f061 | 124 | static int RSA_eay_public_decrypt(int flen, const unsigned char *from, |
58964a49 | 125 | unsigned char *to, RSA *rsa,int padding); |
29c1f061 | 126 | static int RSA_eay_private_decrypt(int flen, const unsigned char *from, |
58964a49 | 127 | unsigned char *to, RSA *rsa,int padding); |
46ef873f | 128 | static int RSA_eay_mod_exp(BIGNUM *r0, const BIGNUM *i, RSA *rsa, BN_CTX *ctx); |
58964a49 RE |
129 | static int RSA_eay_init(RSA *rsa); |
130 | static int RSA_eay_finish(RSA *rsa); | |
58964a49 RE |
131 | static RSA_METHOD rsa_pkcs1_eay_meth={ |
132 | "Eric Young's PKCS#1 RSA", | |
133 | RSA_eay_public_encrypt, | |
24cff6ce BM |
134 | RSA_eay_public_decrypt, /* signature verification */ |
135 | RSA_eay_private_encrypt, /* signing */ | |
58964a49 RE |
136 | RSA_eay_private_decrypt, |
137 | RSA_eay_mod_exp, | |
123d24d6 | 138 | BN_mod_exp_mont, /* XXX probably we should not use Montgomery if e == 3 */ |
58964a49 RE |
139 | RSA_eay_init, |
140 | RSA_eay_finish, | |
be6d7700 | 141 | 0, /* flags */ |
58964a49 | 142 | NULL, |
be6d7700 | 143 | 0, /* rsa_sign */ |
2814c629 GT |
144 | 0, /* rsa_verify */ |
145 | NULL /* rsa_keygen */ | |
58964a49 RE |
146 | }; |
147 | ||
7be7c2ed | 148 | const RSA_METHOD *RSA_PKCS1_SSLeay(void) |
58964a49 RE |
149 | { |
150 | return(&rsa_pkcs1_eay_meth); | |
151 | } | |
152 | ||
29c1f061 | 153 | static int RSA_eay_public_encrypt(int flen, const unsigned char *from, |
6b691a5c | 154 | unsigned char *to, RSA *rsa, int padding) |
58964a49 | 155 | { |
46ef873f | 156 | BIGNUM *f,*ret; |
58964a49 RE |
157 | int i,j,k,num=0,r= -1; |
158 | unsigned char *buf=NULL; | |
159 | BN_CTX *ctx=NULL; | |
160 | ||
5e3225cc BM |
161 | if (BN_num_bits(rsa->n) > OPENSSL_RSA_MAX_MODULUS_BITS) |
162 | { | |
163 | RSAerr(RSA_F_RSA_EAY_PUBLIC_ENCRYPT, RSA_R_MODULUS_TOO_LARGE); | |
164 | return -1; | |
165 | } | |
166 | ||
167 | if (BN_ucmp(rsa->n, rsa->e) <= 0) | |
168 | { | |
169 | RSAerr(RSA_F_RSA_EAY_PUBLIC_ENCRYPT, RSA_R_BAD_E_VALUE); | |
170 | return -1; | |
171 | } | |
172 | ||
173 | /* for large moduli, enforce exponent limit */ | |
174 | if (BN_num_bits(rsa->n) > OPENSSL_RSA_SMALL_MODULUS_BITS) | |
175 | { | |
176 | if (BN_num_bits(rsa->e) > OPENSSL_RSA_MAX_PUBEXP_BITS) | |
177 | { | |
178 | RSAerr(RSA_F_RSA_EAY_PUBLIC_ENCRYPT, RSA_R_BAD_E_VALUE); | |
179 | return -1; | |
180 | } | |
181 | } | |
182 | ||
58964a49 | 183 | if ((ctx=BN_CTX_new()) == NULL) goto err; |
46ef873f GT |
184 | BN_CTX_start(ctx); |
185 | f = BN_CTX_get(ctx); | |
186 | ret = BN_CTX_get(ctx); | |
58964a49 | 187 | num=BN_num_bytes(rsa->n); |
46ef873f GT |
188 | buf = OPENSSL_malloc(num); |
189 | if (!f || !ret || !buf) | |
58964a49 RE |
190 | { |
191 | RSAerr(RSA_F_RSA_EAY_PUBLIC_ENCRYPT,ERR_R_MALLOC_FAILURE); | |
192 | goto err; | |
193 | } | |
194 | ||
195 | switch (padding) | |
196 | { | |
197 | case RSA_PKCS1_PADDING: | |
198 | i=RSA_padding_add_PKCS1_type_2(buf,num,from,flen); | |
199 | break; | |
cf1b7d96 | 200 | #ifndef OPENSSL_NO_SHA |
a4949896 BL |
201 | case RSA_PKCS1_OAEP_PADDING: |
202 | i=RSA_padding_add_PKCS1_OAEP(buf,num,from,flen,NULL,0); | |
203 | break; | |
79df9d62 | 204 | #endif |
58964a49 RE |
205 | case RSA_SSLV23_PADDING: |
206 | i=RSA_padding_add_SSLv23(buf,num,from,flen); | |
207 | break; | |
208 | case RSA_NO_PADDING: | |
209 | i=RSA_padding_add_none(buf,num,from,flen); | |
210 | break; | |
211 | default: | |
212 | RSAerr(RSA_F_RSA_EAY_PUBLIC_ENCRYPT,RSA_R_UNKNOWN_PADDING_TYPE); | |
213 | goto err; | |
214 | } | |
215 | if (i <= 0) goto err; | |
216 | ||
46ef873f | 217 | if (BN_bin2bn(buf,num,f) == NULL) goto err; |
58964a49 | 218 | |
46ef873f | 219 | if (BN_ucmp(f, rsa->n) >= 0) |
7c9882eb | 220 | { |
24cff6ce BM |
221 | /* usually the padding functions would catch this */ |
222 | RSAerr(RSA_F_RSA_EAY_PUBLIC_ENCRYPT,RSA_R_DATA_TOO_LARGE_FOR_MODULUS); | |
223 | goto err; | |
224 | } | |
225 | ||
db99c525 BM |
226 | if (rsa->flags & RSA_FLAG_CACHE_PUBLIC) |
227 | if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx)) | |
228 | goto err; | |
79221bc2 | 229 | |
46ef873f | 230 | if (!rsa->meth->bn_mod_exp(ret,f,rsa->e,rsa->n,ctx, |
03f8b042 | 231 | rsa->_method_mod_n)) goto err; |
58964a49 RE |
232 | |
233 | /* put in leading 0 bytes if the number is less than the | |
234 | * length of the modulus */ | |
46ef873f GT |
235 | j=BN_num_bytes(ret); |
236 | i=BN_bn2bin(ret,&(to[num-j])); | |
58964a49 RE |
237 | for (k=0; k<(num-i); k++) |
238 | to[k]=0; | |
239 | ||
240 | r=num; | |
241 | err: | |
46ef873f GT |
242 | if (ctx != NULL) |
243 | { | |
244 | BN_CTX_end(ctx); | |
245 | BN_CTX_free(ctx); | |
246 | } | |
58964a49 RE |
247 | if (buf != NULL) |
248 | { | |
4579924b | 249 | OPENSSL_cleanse(buf,num); |
26a3a48d | 250 | OPENSSL_free(buf); |
58964a49 RE |
251 | } |
252 | return(r); | |
253 | } | |
254 | ||
675f605d | 255 | static BN_BLINDING *rsa_get_blinding(RSA *rsa, int *local, BN_CTX *ctx) |
800e400d NL |
256 | { |
257 | BN_BLINDING *ret; | |
675f605d | 258 | int got_write_lock = 0; |
4c329696 | 259 | CRYPTO_THREADID cur; |
675f605d BM |
260 | |
261 | CRYPTO_r_lock(CRYPTO_LOCK_RSA); | |
c554155b | 262 | |
800e400d NL |
263 | if (rsa->blinding == NULL) |
264 | { | |
675f605d BM |
265 | CRYPTO_r_unlock(CRYPTO_LOCK_RSA); |
266 | CRYPTO_w_lock(CRYPTO_LOCK_RSA); | |
267 | got_write_lock = 1; | |
268 | ||
800e400d | 269 | if (rsa->blinding == NULL) |
675f605d | 270 | rsa->blinding = RSA_setup_blinding(rsa, ctx); |
800e400d | 271 | } |
c554155b | 272 | |
800e400d NL |
273 | ret = rsa->blinding; |
274 | if (ret == NULL) | |
675f605d | 275 | goto err; |
5679bcce | 276 | |
4c329696 GT |
277 | CRYPTO_THREADID_current(&cur); |
278 | if (!CRYPTO_THREADID_cmp(&cur, BN_BLINDING_thread_id(ret))) | |
800e400d | 279 | { |
675f605d BM |
280 | /* rsa->blinding is ours! */ |
281 | ||
282 | *local = 1; | |
283 | } | |
284 | else | |
285 | { | |
286 | /* resort to rsa->mt_blinding instead */ | |
287 | ||
288 | *local = 0; /* instructs rsa_blinding_convert(), rsa_blinding_invert() | |
289 | * that the BN_BLINDING is shared, meaning that accesses | |
290 | * require locks, and that the blinding factor must be | |
291 | * stored outside the BN_BLINDING | |
292 | */ | |
293 | ||
800e400d NL |
294 | if (rsa->mt_blinding == NULL) |
295 | { | |
675f605d BM |
296 | if (!got_write_lock) |
297 | { | |
298 | CRYPTO_r_unlock(CRYPTO_LOCK_RSA); | |
299 | CRYPTO_w_lock(CRYPTO_LOCK_RSA); | |
300 | got_write_lock = 1; | |
301 | } | |
302 | ||
800e400d NL |
303 | if (rsa->mt_blinding == NULL) |
304 | rsa->mt_blinding = RSA_setup_blinding(rsa, ctx); | |
800e400d NL |
305 | } |
306 | ret = rsa->mt_blinding; | |
307 | } | |
5679bcce | 308 | |
675f605d BM |
309 | err: |
310 | if (got_write_lock) | |
311 | CRYPTO_w_unlock(CRYPTO_LOCK_RSA); | |
312 | else | |
313 | CRYPTO_r_unlock(CRYPTO_LOCK_RSA); | |
800e400d NL |
314 | return ret; |
315 | } | |
5679bcce | 316 | |
2d95ceed BM |
317 | static int rsa_blinding_convert(BN_BLINDING *b, BIGNUM *f, BIGNUM *unblind, |
318 | BN_CTX *ctx) | |
319 | { | |
320 | if (unblind == NULL) | |
321 | /* Local blinding: store the unblinding factor | |
322 | * in BN_BLINDING. */ | |
800e400d NL |
323 | return BN_BLINDING_convert_ex(f, NULL, b, ctx); |
324 | else | |
5679bcce | 325 | { |
2d95ceed BM |
326 | /* Shared blinding: store the unblinding factor |
327 | * outside BN_BLINDING. */ | |
800e400d | 328 | int ret; |
ce75ca04 | 329 | CRYPTO_w_lock(CRYPTO_LOCK_RSA_BLINDING); |
2d95ceed | 330 | ret = BN_BLINDING_convert_ex(f, unblind, b, ctx); |
ce75ca04 | 331 | CRYPTO_w_unlock(CRYPTO_LOCK_RSA_BLINDING); |
800e400d | 332 | return ret; |
5679bcce | 333 | } |
2d95ceed BM |
334 | } |
335 | ||
336 | static int rsa_blinding_invert(BN_BLINDING *b, BIGNUM *f, BIGNUM *unblind, | |
337 | BN_CTX *ctx) | |
338 | { | |
339 | /* For local blinding, unblind is set to NULL, and BN_BLINDING_invert_ex | |
340 | * will use the unblinding factor stored in BN_BLINDING. | |
341 | * If BN_BLINDING is shared between threads, unblind must be non-null: | |
342 | * BN_BLINDING_invert_ex will then use the local unblinding factor, | |
343 | * and will only read the modulus from BN_BLINDING. | |
344 | * In both cases it's safe to access the blinding without a lock. | |
345 | */ | |
346 | return BN_BLINDING_invert_ex(f, unblind, b, ctx); | |
347 | } | |
5679bcce | 348 | |
24cff6ce | 349 | /* signing */ |
29c1f061 | 350 | static int RSA_eay_private_encrypt(int flen, const unsigned char *from, |
6b691a5c | 351 | unsigned char *to, RSA *rsa, int padding) |
58964a49 | 352 | { |
2d95ceed | 353 | BIGNUM *f, *ret, *res; |
58964a49 RE |
354 | int i,j,k,num=0,r= -1; |
355 | unsigned char *buf=NULL; | |
356 | BN_CTX *ctx=NULL; | |
5679bcce | 357 | int local_blinding = 0; |
2d95ceed BM |
358 | /* Used only if the blinding structure is shared. A non-NULL unblind |
359 | * instructs rsa_blinding_convert() and rsa_blinding_invert() to store | |
360 | * the unblinding factor outside the blinding structure. */ | |
361 | BIGNUM *unblind = NULL; | |
5679bcce | 362 | BN_BLINDING *blinding = NULL; |
58964a49 RE |
363 | |
364 | if ((ctx=BN_CTX_new()) == NULL) goto err; | |
46ef873f | 365 | BN_CTX_start(ctx); |
800e400d | 366 | f = BN_CTX_get(ctx); |
46ef873f | 367 | ret = BN_CTX_get(ctx); |
800e400d | 368 | num = BN_num_bytes(rsa->n); |
46ef873f GT |
369 | buf = OPENSSL_malloc(num); |
370 | if(!f || !ret || !buf) | |
58964a49 RE |
371 | { |
372 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,ERR_R_MALLOC_FAILURE); | |
373 | goto err; | |
374 | } | |
375 | ||
376 | switch (padding) | |
377 | { | |
378 | case RSA_PKCS1_PADDING: | |
379 | i=RSA_padding_add_PKCS1_type_1(buf,num,from,flen); | |
380 | break; | |
499fca2d DSH |
381 | case RSA_X931_PADDING: |
382 | i=RSA_padding_add_X931(buf,num,from,flen); | |
383 | break; | |
58964a49 RE |
384 | case RSA_NO_PADDING: |
385 | i=RSA_padding_add_none(buf,num,from,flen); | |
386 | break; | |
387 | case RSA_SSLV23_PADDING: | |
388 | default: | |
389 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,RSA_R_UNKNOWN_PADDING_TYPE); | |
390 | goto err; | |
391 | } | |
392 | if (i <= 0) goto err; | |
393 | ||
46ef873f | 394 | if (BN_bin2bn(buf,num,f) == NULL) goto err; |
24cff6ce | 395 | |
46ef873f | 396 | if (BN_ucmp(f, rsa->n) >= 0) |
24cff6ce BM |
397 | { |
398 | /* usually the padding functions would catch this */ | |
399 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,RSA_R_DATA_TOO_LARGE_FOR_MODULUS); | |
400 | goto err; | |
401 | } | |
58964a49 | 402 | |
c554155b | 403 | if (!(rsa->flags & RSA_FLAG_NO_BLINDING)) |
5679bcce | 404 | { |
675f605d | 405 | blinding = rsa_get_blinding(rsa, &local_blinding, ctx); |
5679bcce BM |
406 | if (blinding == NULL) |
407 | { | |
408 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_INTERNAL_ERROR); | |
409 | goto err; | |
410 | } | |
411 | } | |
412 | ||
413 | if (blinding != NULL) | |
2d95ceed BM |
414 | { |
415 | if (!local_blinding && ((unblind = BN_CTX_get(ctx)) == NULL)) | |
416 | { | |
417 | RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,ERR_R_MALLOC_FAILURE); | |
418 | goto err; | |
419 | } | |
420 | if (!rsa_blinding_convert(blinding, f, unblind, ctx)) | |
800e400d | 421 | goto err; |
2d95ceed | 422 | } |
58964a49 | 423 | |
770d19b8 DSH |
424 | if ( (rsa->flags & RSA_FLAG_EXT_PKEY) || |
425 | ((rsa->p != NULL) && | |
58964a49 RE |
426 | (rsa->q != NULL) && |
427 | (rsa->dmp1 != NULL) && | |
428 | (rsa->dmq1 != NULL) && | |
770d19b8 | 429 | (rsa->iqmp != NULL)) ) |
46a64376 BM |
430 | { |
431 | if (!rsa->meth->rsa_mod_exp(ret, f, rsa, ctx)) goto err; | |
432 | } | |
58964a49 RE |
433 | else |
434 | { | |
46a64376 BM |
435 | BIGNUM local_d; |
436 | BIGNUM *d = NULL; | |
437 | ||
bd31fb21 | 438 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) |
46a64376 | 439 | { |
a28a5d9c | 440 | BN_init(&local_d); |
46a64376 | 441 | d = &local_d; |
bd31fb21 | 442 | BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME); |
46a64376 BM |
443 | } |
444 | else | |
7c9882eb | 445 | d= rsa->d; |
46a64376 | 446 | |
db99c525 BM |
447 | if (rsa->flags & RSA_FLAG_CACHE_PUBLIC) |
448 | if(!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx)) | |
449 | goto err; | |
46a64376 BM |
450 | |
451 | if (!rsa->meth->bn_mod_exp(ret,f,d,rsa->n,ctx, | |
b12753df | 452 | rsa->_method_mod_n)) goto err; |
58964a49 RE |
453 | } |
454 | ||
5679bcce | 455 | if (blinding) |
2d95ceed | 456 | if (!rsa_blinding_invert(blinding, ret, unblind, ctx)) |
800e400d | 457 | goto err; |
58964a49 | 458 | |
499fca2d DSH |
459 | if (padding == RSA_X931_PADDING) |
460 | { | |
461 | BN_sub(f, rsa->n, ret); | |
462 | if (BN_cmp(ret, f)) | |
463 | res = f; | |
464 | else | |
465 | res = ret; | |
466 | } | |
467 | else | |
468 | res = ret; | |
469 | ||
58964a49 RE |
470 | /* put in leading 0 bytes if the number is less than the |
471 | * length of the modulus */ | |
499fca2d DSH |
472 | j=BN_num_bytes(res); |
473 | i=BN_bn2bin(res,&(to[num-j])); | |
58964a49 RE |
474 | for (k=0; k<(num-i); k++) |
475 | to[k]=0; | |
476 | ||
477 | r=num; | |
478 | err: | |
46ef873f GT |
479 | if (ctx != NULL) |
480 | { | |
481 | BN_CTX_end(ctx); | |
482 | BN_CTX_free(ctx); | |
483 | } | |
58964a49 RE |
484 | if (buf != NULL) |
485 | { | |
4579924b | 486 | OPENSSL_cleanse(buf,num); |
26a3a48d | 487 | OPENSSL_free(buf); |
58964a49 RE |
488 | } |
489 | return(r); | |
490 | } | |
491 | ||
29c1f061 | 492 | static int RSA_eay_private_decrypt(int flen, const unsigned char *from, |
6b691a5c | 493 | unsigned char *to, RSA *rsa, int padding) |
58964a49 | 494 | { |
2d95ceed | 495 | BIGNUM *f, *ret; |
58964a49 RE |
496 | int j,num=0,r= -1; |
497 | unsigned char *p; | |
498 | unsigned char *buf=NULL; | |
499 | BN_CTX *ctx=NULL; | |
5679bcce | 500 | int local_blinding = 0; |
2d95ceed BM |
501 | /* Used only if the blinding structure is shared. A non-NULL unblind |
502 | * instructs rsa_blinding_convert() and rsa_blinding_invert() to store | |
503 | * the unblinding factor outside the blinding structure. */ | |
504 | BIGNUM *unblind = NULL; | |
5679bcce | 505 | BN_BLINDING *blinding = NULL; |
58964a49 | 506 | |
46ef873f GT |
507 | if((ctx = BN_CTX_new()) == NULL) goto err; |
508 | BN_CTX_start(ctx); | |
800e400d | 509 | f = BN_CTX_get(ctx); |
46ef873f | 510 | ret = BN_CTX_get(ctx); |
800e400d | 511 | num = BN_num_bytes(rsa->n); |
46ef873f GT |
512 | buf = OPENSSL_malloc(num); |
513 | if(!f || !ret || !buf) | |
58964a49 RE |
514 | { |
515 | RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,ERR_R_MALLOC_FAILURE); | |
516 | goto err; | |
517 | } | |
518 | ||
657e60fa | 519 | /* This check was for equality but PGP does evil things |
58964a49 RE |
520 | * and chops off the top '0' bytes */ |
521 | if (flen > num) | |
522 | { | |
523 | RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,RSA_R_DATA_GREATER_THAN_MOD_LEN); | |
524 | goto err; | |
525 | } | |
526 | ||
527 | /* make data into a big number */ | |
46ef873f | 528 | if (BN_bin2bn(from,(int)flen,f) == NULL) goto err; |
58964a49 | 529 | |
46ef873f | 530 | if (BN_ucmp(f, rsa->n) >= 0) |
24cff6ce BM |
531 | { |
532 | RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,RSA_R_DATA_TOO_LARGE_FOR_MODULUS); | |
533 | goto err; | |
534 | } | |
535 | ||
c554155b | 536 | if (!(rsa->flags & RSA_FLAG_NO_BLINDING)) |
5679bcce | 537 | { |
675f605d | 538 | blinding = rsa_get_blinding(rsa, &local_blinding, ctx); |
5679bcce BM |
539 | if (blinding == NULL) |
540 | { | |
8afca8d9 | 541 | RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT, ERR_R_INTERNAL_ERROR); |
5679bcce BM |
542 | goto err; |
543 | } | |
544 | } | |
545 | ||
546 | if (blinding != NULL) | |
2d95ceed BM |
547 | { |
548 | if (!local_blinding && ((unblind = BN_CTX_get(ctx)) == NULL)) | |
549 | { | |
550 | RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,ERR_R_MALLOC_FAILURE); | |
800e400d | 551 | goto err; |
2d95ceed BM |
552 | } |
553 | if (!rsa_blinding_convert(blinding, f, unblind, ctx)) | |
554 | goto err; | |
555 | } | |
58964a49 RE |
556 | |
557 | /* do the decrypt */ | |
770d19b8 DSH |
558 | if ( (rsa->flags & RSA_FLAG_EXT_PKEY) || |
559 | ((rsa->p != NULL) && | |
58964a49 RE |
560 | (rsa->q != NULL) && |
561 | (rsa->dmp1 != NULL) && | |
562 | (rsa->dmq1 != NULL) && | |
770d19b8 | 563 | (rsa->iqmp != NULL)) ) |
46a64376 BM |
564 | { |
565 | if (!rsa->meth->rsa_mod_exp(ret, f, rsa, ctx)) goto err; | |
566 | } | |
58964a49 RE |
567 | else |
568 | { | |
46a64376 BM |
569 | BIGNUM local_d; |
570 | BIGNUM *d = NULL; | |
571 | ||
bd31fb21 | 572 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) |
46a64376 BM |
573 | { |
574 | d = &local_d; | |
bd31fb21 | 575 | BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME); |
46a64376 BM |
576 | } |
577 | else | |
578 | d = rsa->d; | |
579 | ||
db99c525 BM |
580 | if (rsa->flags & RSA_FLAG_CACHE_PUBLIC) |
581 | if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx)) | |
582 | goto err; | |
46a64376 | 583 | if (!rsa->meth->bn_mod_exp(ret,f,d,rsa->n,ctx, |
b12753df | 584 | rsa->_method_mod_n)) |
46a64376 | 585 | goto err; |
58964a49 RE |
586 | } |
587 | ||
5679bcce | 588 | if (blinding) |
2d95ceed | 589 | if (!rsa_blinding_invert(blinding, ret, unblind, ctx)) |
800e400d | 590 | goto err; |
58964a49 RE |
591 | |
592 | p=buf; | |
46ef873f | 593 | j=BN_bn2bin(ret,p); /* j is only used with no-padding mode */ |
58964a49 RE |
594 | |
595 | switch (padding) | |
596 | { | |
597 | case RSA_PKCS1_PADDING: | |
dfeab068 | 598 | r=RSA_padding_check_PKCS1_type_2(to,num,buf,j,num); |
58964a49 | 599 | break; |
cf1b7d96 | 600 | #ifndef OPENSSL_NO_SHA |
68d2cf51 BL |
601 | case RSA_PKCS1_OAEP_PADDING: |
602 | r=RSA_padding_check_PKCS1_OAEP(to,num,buf,j,num,NULL,0); | |
603 | break; | |
79df9d62 | 604 | #endif |
a4949896 | 605 | case RSA_SSLV23_PADDING: |
dfeab068 | 606 | r=RSA_padding_check_SSLv23(to,num,buf,j,num); |
58964a49 RE |
607 | break; |
608 | case RSA_NO_PADDING: | |
dfeab068 | 609 | r=RSA_padding_check_none(to,num,buf,j,num); |
58964a49 RE |
610 | break; |
611 | default: | |
612 | RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,RSA_R_UNKNOWN_PADDING_TYPE); | |
613 | goto err; | |
614 | } | |
615 | if (r < 0) | |
616 | RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT,RSA_R_PADDING_CHECK_FAILED); | |
617 | ||
618 | err: | |
46ef873f GT |
619 | if (ctx != NULL) |
620 | { | |
621 | BN_CTX_end(ctx); | |
622 | BN_CTX_free(ctx); | |
623 | } | |
58964a49 RE |
624 | if (buf != NULL) |
625 | { | |
4579924b | 626 | OPENSSL_cleanse(buf,num); |
26a3a48d | 627 | OPENSSL_free(buf); |
58964a49 RE |
628 | } |
629 | return(r); | |
630 | } | |
631 | ||
24cff6ce | 632 | /* signature verification */ |
29c1f061 | 633 | static int RSA_eay_public_decrypt(int flen, const unsigned char *from, |
6b691a5c | 634 | unsigned char *to, RSA *rsa, int padding) |
58964a49 | 635 | { |
46ef873f | 636 | BIGNUM *f,*ret; |
58964a49 RE |
637 | int i,num=0,r= -1; |
638 | unsigned char *p; | |
639 | unsigned char *buf=NULL; | |
640 | BN_CTX *ctx=NULL; | |
641 | ||
5e3225cc BM |
642 | if (BN_num_bits(rsa->n) > OPENSSL_RSA_MAX_MODULUS_BITS) |
643 | { | |
644 | RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT, RSA_R_MODULUS_TOO_LARGE); | |
645 | return -1; | |
646 | } | |
647 | ||
648 | if (BN_ucmp(rsa->n, rsa->e) <= 0) | |
649 | { | |
650 | RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT, RSA_R_BAD_E_VALUE); | |
651 | return -1; | |
652 | } | |
653 | ||
654 | /* for large moduli, enforce exponent limit */ | |
655 | if (BN_num_bits(rsa->n) > OPENSSL_RSA_SMALL_MODULUS_BITS) | |
656 | { | |
657 | if (BN_num_bits(rsa->e) > OPENSSL_RSA_MAX_PUBEXP_BITS) | |
658 | { | |
659 | RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT, RSA_R_BAD_E_VALUE); | |
660 | return -1; | |
661 | } | |
662 | } | |
663 | ||
46ef873f GT |
664 | if((ctx = BN_CTX_new()) == NULL) goto err; |
665 | BN_CTX_start(ctx); | |
666 | f = BN_CTX_get(ctx); | |
667 | ret = BN_CTX_get(ctx); | |
58964a49 | 668 | num=BN_num_bytes(rsa->n); |
46ef873f GT |
669 | buf = OPENSSL_malloc(num); |
670 | if(!f || !ret || !buf) | |
58964a49 RE |
671 | { |
672 | RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,ERR_R_MALLOC_FAILURE); | |
673 | goto err; | |
674 | } | |
675 | ||
657e60fa | 676 | /* This check was for equality but PGP does evil things |
58964a49 RE |
677 | * and chops off the top '0' bytes */ |
678 | if (flen > num) | |
679 | { | |
680 | RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,RSA_R_DATA_GREATER_THAN_MOD_LEN); | |
681 | goto err; | |
682 | } | |
683 | ||
46ef873f | 684 | if (BN_bin2bn(from,flen,f) == NULL) goto err; |
24cff6ce | 685 | |
46ef873f | 686 | if (BN_ucmp(f, rsa->n) >= 0) |
24cff6ce BM |
687 | { |
688 | RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,RSA_R_DATA_TOO_LARGE_FOR_MODULUS); | |
689 | goto err; | |
690 | } | |
691 | ||
db99c525 BM |
692 | if (rsa->flags & RSA_FLAG_CACHE_PUBLIC) |
693 | if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx)) | |
694 | goto err; | |
79221bc2 | 695 | |
46ef873f | 696 | if (!rsa->meth->bn_mod_exp(ret,f,rsa->e,rsa->n,ctx, |
03f8b042 | 697 | rsa->_method_mod_n)) goto err; |
58964a49 | 698 | |
499fca2d | 699 | if ((padding == RSA_X931_PADDING) && ((ret->d[0] & 0xf) != 12)) |
7770da4b | 700 | if (!BN_sub(ret, rsa->n, ret)) goto err; |
499fca2d | 701 | |
58964a49 | 702 | p=buf; |
46ef873f | 703 | i=BN_bn2bin(ret,p); |
58964a49 RE |
704 | |
705 | switch (padding) | |
706 | { | |
707 | case RSA_PKCS1_PADDING: | |
dfeab068 | 708 | r=RSA_padding_check_PKCS1_type_1(to,num,buf,i,num); |
58964a49 | 709 | break; |
499fca2d DSH |
710 | case RSA_X931_PADDING: |
711 | r=RSA_padding_check_X931(to,num,buf,i,num); | |
712 | break; | |
58964a49 | 713 | case RSA_NO_PADDING: |
dfeab068 | 714 | r=RSA_padding_check_none(to,num,buf,i,num); |
58964a49 RE |
715 | break; |
716 | default: | |
717 | RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,RSA_R_UNKNOWN_PADDING_TYPE); | |
718 | goto err; | |
719 | } | |
720 | if (r < 0) | |
721 | RSAerr(RSA_F_RSA_EAY_PUBLIC_DECRYPT,RSA_R_PADDING_CHECK_FAILED); | |
722 | ||
723 | err: | |
46ef873f GT |
724 | if (ctx != NULL) |
725 | { | |
726 | BN_CTX_end(ctx); | |
727 | BN_CTX_free(ctx); | |
728 | } | |
58964a49 RE |
729 | if (buf != NULL) |
730 | { | |
4579924b | 731 | OPENSSL_cleanse(buf,num); |
26a3a48d | 732 | OPENSSL_free(buf); |
58964a49 RE |
733 | } |
734 | return(r); | |
735 | } | |
736 | ||
46ef873f | 737 | static int RSA_eay_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx) |
58964a49 | 738 | { |
46ef873f | 739 | BIGNUM *r1,*m1,*vrfy; |
bd31fb21 BM |
740 | BIGNUM local_dmp1,local_dmq1,local_c,local_r1; |
741 | BIGNUM *dmp1,*dmq1,*c,*pr1; | |
58964a49 | 742 | int ret=0; |
58964a49 | 743 | |
46ef873f GT |
744 | BN_CTX_start(ctx); |
745 | r1 = BN_CTX_get(ctx); | |
746 | m1 = BN_CTX_get(ctx); | |
747 | vrfy = BN_CTX_get(ctx); | |
58964a49 | 748 | |
7c9882eb BM |
749 | { |
750 | BIGNUM local_p, local_q; | |
751 | BIGNUM *p = NULL, *q = NULL; | |
bd31fb21 | 752 | |
7c9882eb BM |
753 | /* Make sure BN_mod_inverse in Montgomery intialization uses the |
754 | * BN_FLG_CONSTTIME flag (unless RSA_FLAG_NO_CONSTTIME is set) | |
755 | */ | |
756 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) | |
757 | { | |
758 | BN_init(&local_p); | |
759 | p = &local_p; | |
760 | BN_with_flags(p, rsa->p, BN_FLG_CONSTTIME); | |
761 | ||
762 | BN_init(&local_q); | |
763 | q = &local_q; | |
764 | BN_with_flags(q, rsa->q, BN_FLG_CONSTTIME); | |
765 | } | |
766 | else | |
767 | { | |
768 | p = rsa->p; | |
769 | q = rsa->q; | |
770 | } | |
771 | ||
db99c525 BM |
772 | if (rsa->flags & RSA_FLAG_CACHE_PRIVATE) |
773 | { | |
774 | if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_p, CRYPTO_LOCK_RSA, p, ctx)) | |
775 | goto err; | |
776 | if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_q, CRYPTO_LOCK_RSA, q, ctx)) | |
777 | goto err; | |
778 | } | |
7c9882eb | 779 | } |
bd31fb21 | 780 | |
db99c525 BM |
781 | if (rsa->flags & RSA_FLAG_CACHE_PUBLIC) |
782 | if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx)) | |
783 | goto err; | |
126fe085 | 784 | |
bd31fb21 BM |
785 | /* compute I mod q */ |
786 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) | |
787 | { | |
788 | c = &local_c; | |
789 | BN_with_flags(c, I, BN_FLG_CONSTTIME); | |
790 | if (!BN_mod(r1,c,rsa->q,ctx)) goto err; | |
791 | } | |
792 | else | |
793 | { | |
794 | if (!BN_mod(r1,I,rsa->q,ctx)) goto err; | |
795 | } | |
796 | ||
797 | /* compute r1^dmq1 mod q */ | |
798 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) | |
46a64376 BM |
799 | { |
800 | dmq1 = &local_dmq1; | |
bd31fb21 | 801 | BN_with_flags(dmq1, rsa->dmq1, BN_FLG_CONSTTIME); |
46a64376 BM |
802 | } |
803 | else | |
804 | dmq1 = rsa->dmq1; | |
805 | if (!rsa->meth->bn_mod_exp(m1,r1,dmq1,rsa->q,ctx, | |
03f8b042 | 806 | rsa->_method_mod_q)) goto err; |
58964a49 | 807 | |
bd31fb21 BM |
808 | /* compute I mod p */ |
809 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) | |
810 | { | |
811 | c = &local_c; | |
812 | BN_with_flags(c, I, BN_FLG_CONSTTIME); | |
813 | if (!BN_mod(r1,c,rsa->p,ctx)) goto err; | |
814 | } | |
815 | else | |
816 | { | |
817 | if (!BN_mod(r1,I,rsa->p,ctx)) goto err; | |
818 | } | |
819 | ||
820 | /* compute r1^dmp1 mod p */ | |
821 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) | |
46a64376 BM |
822 | { |
823 | dmp1 = &local_dmp1; | |
bd31fb21 | 824 | BN_with_flags(dmp1, rsa->dmp1, BN_FLG_CONSTTIME); |
46a64376 BM |
825 | } |
826 | else | |
827 | dmp1 = rsa->dmp1; | |
828 | if (!rsa->meth->bn_mod_exp(r0,r1,dmp1,rsa->p,ctx, | |
03f8b042 | 829 | rsa->_method_mod_p)) goto err; |
58964a49 | 830 | |
46ef873f | 831 | if (!BN_sub(r0,r0,m1)) goto err; |
dfeab068 RE |
832 | /* This will help stop the size of r0 increasing, which does |
833 | * affect the multiply if it optimised for a power of 2 size */ | |
ff22e913 | 834 | if (BN_is_negative(r0)) |
dfeab068 | 835 | if (!BN_add(r0,r0,rsa->p)) goto err; |
58964a49 | 836 | |
46ef873f | 837 | if (!BN_mul(r1,r0,rsa->iqmp,ctx)) goto err; |
bd31fb21 BM |
838 | |
839 | /* Turn BN_FLG_CONSTTIME flag on before division operation */ | |
840 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) | |
841 | { | |
842 | pr1 = &local_r1; | |
843 | BN_with_flags(pr1, r1, BN_FLG_CONSTTIME); | |
844 | } | |
845 | else | |
846 | pr1 = r1; | |
847 | if (!BN_mod(r0,pr1,rsa->p,ctx)) goto err; | |
848 | ||
abd4c915 | 849 | /* If p < q it is occasionally possible for the correction of |
68d2cf51 | 850 | * adding 'p' if r0 is negative above to leave the result still |
abd4c915 DSH |
851 | * negative. This can break the private key operations: the following |
852 | * second correction should *always* correct this rare occurrence. | |
853 | * This will *never* happen with OpenSSL generated keys because | |
68d2cf51 BL |
854 | * they ensure p > q [steve] |
855 | */ | |
ff22e913 | 856 | if (BN_is_negative(r0)) |
abd4c915 | 857 | if (!BN_add(r0,r0,rsa->p)) goto err; |
46ef873f GT |
858 | if (!BN_mul(r1,r0,rsa->q,ctx)) goto err; |
859 | if (!BN_add(r0,r1,m1)) goto err; | |
58964a49 | 860 | |
6a5b52ef UM |
861 | if (rsa->e && rsa->n) |
862 | { | |
46ef873f | 863 | if (!rsa->meth->bn_mod_exp(vrfy,r0,rsa->e,rsa->n,ctx,rsa->_method_mod_n)) goto err; |
81d1998e GT |
864 | /* If 'I' was greater than (or equal to) rsa->n, the operation |
865 | * will be equivalent to using 'I mod n'. However, the result of | |
866 | * the verify will *always* be less than 'n' so we don't check | |
867 | * for absolute equality, just congruency. */ | |
46ef873f GT |
868 | if (!BN_sub(vrfy, vrfy, I)) goto err; |
869 | if (!BN_mod(vrfy, vrfy, rsa->n, ctx)) goto err; | |
ff22e913 | 870 | if (BN_is_negative(vrfy)) |
46ef873f GT |
871 | if (!BN_add(vrfy, vrfy, rsa->n)) goto err; |
872 | if (!BN_is_zero(vrfy)) | |
46a64376 | 873 | { |
81d1998e GT |
874 | /* 'I' and 'vrfy' aren't congruent mod n. Don't leak |
875 | * miscalculated CRT output, just do a raw (slower) | |
876 | * mod_exp and return that instead. */ | |
46a64376 BM |
877 | |
878 | BIGNUM local_d; | |
879 | BIGNUM *d = NULL; | |
880 | ||
bd31fb21 | 881 | if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) |
46a64376 BM |
882 | { |
883 | d = &local_d; | |
bd31fb21 | 884 | BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME); |
46a64376 BM |
885 | } |
886 | else | |
887 | d = rsa->d; | |
888 | if (!rsa->meth->bn_mod_exp(r0,I,d,rsa->n,ctx, | |
889 | rsa->_method_mod_n)) goto err; | |
890 | } | |
6a5b52ef | 891 | } |
58964a49 RE |
892 | ret=1; |
893 | err: | |
46ef873f | 894 | BN_CTX_end(ctx); |
58964a49 RE |
895 | return(ret); |
896 | } | |
897 | ||
6b691a5c | 898 | static int RSA_eay_init(RSA *rsa) |
58964a49 RE |
899 | { |
900 | rsa->flags|=RSA_FLAG_CACHE_PUBLIC|RSA_FLAG_CACHE_PRIVATE; | |
901 | return(1); | |
902 | } | |
903 | ||
6b691a5c | 904 | static int RSA_eay_finish(RSA *rsa) |
58964a49 | 905 | { |
03f8b042 BL |
906 | if (rsa->_method_mod_n != NULL) |
907 | BN_MONT_CTX_free(rsa->_method_mod_n); | |
908 | if (rsa->_method_mod_p != NULL) | |
909 | BN_MONT_CTX_free(rsa->_method_mod_p); | |
910 | if (rsa->_method_mod_q != NULL) | |
911 | BN_MONT_CTX_free(rsa->_method_mod_q); | |
58964a49 RE |
912 | return(1); |
913 | } | |
914 | ||
c1cd88a0 | 915 | #endif |