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 const char RSA_version[] = "RSA" OPENSSL_VERSION_PTEXT;
71
72 static const RSA_METHOD *default_RSA_meth = NULL;
73
RSA_new(void)74 RSA *RSA_new(void)
75 {
76 RSA *r = RSA_new_method(NULL);
77
78 return r;
79 }
80
RSA_set_default_method(const RSA_METHOD * meth)81 void RSA_set_default_method(const RSA_METHOD *meth)
82 {
83 #ifdef OPENSSL_FIPS
84 if (FIPS_mode() && !(meth->flags & RSA_FLAG_FIPS_METHOD)) {
85 RSAerr(RSA_F_RSA_SET_DEFAULT_METHOD, RSA_R_NON_FIPS_METHOD);
86 return;
87 }
88 #endif
89 default_RSA_meth = meth;
90 }
91
RSA_get_default_method(void)92 const RSA_METHOD *RSA_get_default_method(void)
93 {
94 if (default_RSA_meth == NULL) {
95 #ifdef RSA_NULL
96 default_RSA_meth = RSA_null_method();
97 #else
98 # if 0 /* was: #ifdef RSAref */
99 default_RSA_meth = RSA_PKCS1_RSAref();
100 # else
101 default_RSA_meth = RSA_PKCS1_SSLeay();
102 # endif
103 #endif
104 }
105
106 return default_RSA_meth;
107 }
108
RSA_get_method(const RSA * rsa)109 const RSA_METHOD *RSA_get_method(const RSA *rsa)
110 {
111 return rsa->meth;
112 }
113
RSA_set_method(RSA * rsa,const RSA_METHOD * meth)114 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
115 {
116 /*
117 * NB: The caller is specifically setting a method, so it's not up to us
118 * to deal with which ENGINE it comes from.
119 */
120 const RSA_METHOD *mtmp;
121 #ifdef OPENSSL_FIPS
122 if (FIPS_mode() && !(meth->flags & RSA_FLAG_FIPS_METHOD)) {
123 RSAerr(RSA_F_RSA_SET_METHOD, RSA_R_NON_FIPS_METHOD);
124 return 0;
125 }
126 #endif
127 mtmp = rsa->meth;
128 if (mtmp->finish)
129 mtmp->finish(rsa);
130 #ifndef OPENSSL_NO_ENGINE
131 if (rsa->engine) {
132 ENGINE_finish(rsa->engine);
133 rsa->engine = NULL;
134 }
135 #endif
136 rsa->meth = meth;
137 if (meth->init)
138 meth->init(rsa);
139 return 1;
140 }
141
RSA_new_method(ENGINE * engine)142 RSA *RSA_new_method(ENGINE *engine)
143 {
144 RSA *ret;
145
146 ret = (RSA *)OPENSSL_malloc(sizeof(RSA));
147 if (ret == NULL) {
148 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
149 return NULL;
150 }
151
152 ret->meth = RSA_get_default_method();
153 #ifndef OPENSSL_NO_ENGINE
154 if (engine) {
155 if (!ENGINE_init(engine)) {
156 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
157 OPENSSL_free(ret);
158 return NULL;
159 }
160 ret->engine = engine;
161 } else
162 ret->engine = ENGINE_get_default_RSA();
163 if (ret->engine) {
164 ret->meth = ENGINE_get_RSA(ret->engine);
165 if (!ret->meth) {
166 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
167 ENGINE_finish(ret->engine);
168 OPENSSL_free(ret);
169 return NULL;
170 }
171 }
172 #endif
173 #ifdef OPENSSL_FIPS
174 if (FIPS_mode() && !(ret->meth->flags & RSA_FLAG_FIPS_METHOD)) {
175 RSAerr(RSA_F_RSA_NEW_METHOD, RSA_R_NON_FIPS_METHOD);
176 # ifndef OPENSSL_NO_ENGINE
177 if (ret->engine)
178 ENGINE_finish(ret->engine);
179 # endif
180 OPENSSL_free(ret);
181 return NULL;
182 }
183 #endif
184
185 ret->pad = 0;
186 ret->version = 0;
187 ret->n = NULL;
188 ret->e = NULL;
189 ret->d = NULL;
190 ret->p = NULL;
191 ret->q = NULL;
192 ret->dmp1 = NULL;
193 ret->dmq1 = NULL;
194 ret->iqmp = NULL;
195 ret->references = 1;
196 ret->_method_mod_n = NULL;
197 ret->_method_mod_p = NULL;
198 ret->_method_mod_q = NULL;
199 ret->blinding = NULL;
200 ret->mt_blinding = NULL;
201 ret->bignum_data = NULL;
202 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
203 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
204 #ifndef OPENSSL_NO_ENGINE
205 if (ret->engine)
206 ENGINE_finish(ret->engine);
207 #endif
208 OPENSSL_free(ret);
209 return (NULL);
210 }
211
212 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
213 #ifndef OPENSSL_NO_ENGINE
214 if (ret->engine)
215 ENGINE_finish(ret->engine);
216 #endif
217 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
218 OPENSSL_free(ret);
219 ret = NULL;
220 }
221 return (ret);
222 }
223
RSA_free(RSA * r)224 void RSA_free(RSA *r)
225 {
226 int i;
227
228 if (r == NULL)
229 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)
236 return;
237 #ifdef REF_CHECK
238 if (i < 0) {
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)
254 BN_clear_free(r->n);
255 if (r->e != NULL)
256 BN_clear_free(r->e);
257 if (r->d != NULL)
258 BN_clear_free(r->d);
259 if (r->p != NULL)
260 BN_clear_free(r->p);
261 if (r->q != NULL)
262 BN_clear_free(r->q);
263 if (r->dmp1 != NULL)
264 BN_clear_free(r->dmp1);
265 if (r->dmq1 != NULL)
266 BN_clear_free(r->dmq1);
267 if (r->iqmp != NULL)
268 BN_clear_free(r->iqmp);
269 if (r->blinding != NULL)
270 BN_BLINDING_free(r->blinding);
271 if (r->mt_blinding != NULL)
272 BN_BLINDING_free(r->mt_blinding);
273 if (r->bignum_data != NULL)
274 OPENSSL_free_locked(r->bignum_data);
275 OPENSSL_free(r);
276 }
277
RSA_up_ref(RSA * r)278 int RSA_up_ref(RSA *r)
279 {
280 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
281 #ifdef REF_PRINT
282 REF_PRINT("RSA", r);
283 #endif
284 #ifdef REF_CHECK
285 if (i < 2) {
286 fprintf(stderr, "RSA_up_ref, bad reference count\n");
287 abort();
288 }
289 #endif
290 return ((i > 1) ? 1 : 0);
291 }
292
RSA_get_ex_new_index(long argl,void * argp,CRYPTO_EX_new * new_func,CRYPTO_EX_dup * dup_func,CRYPTO_EX_free * free_func)293 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
294 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
295 {
296 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
297 new_func, dup_func, free_func);
298 }
299
RSA_set_ex_data(RSA * r,int idx,void * arg)300 int RSA_set_ex_data(RSA *r, int idx, void *arg)
301 {
302 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
303 }
304
RSA_get_ex_data(const RSA * r,int idx)305 void *RSA_get_ex_data(const RSA *r, int idx)
306 {
307 return (CRYPTO_get_ex_data(&r->ex_data, idx));
308 }
309
RSA_flags(const RSA * r)310 int RSA_flags(const RSA *r)
311 {
312 return ((r == NULL) ? 0 : r->meth->flags);
313 }
314
RSA_memory_lock(RSA * r)315 int RSA_memory_lock(RSA *r)
316 {
317 int i, j, k, off;
318 char *p;
319 BIGNUM *bn, **t[6], *b;
320 BN_ULONG *ul;
321
322 if (r->d == NULL)
323 return (1);
324 t[0] = &r->d;
325 t[1] = &r->p;
326 t[2] = &r->q;
327 t[3] = &r->dmp1;
328 t[4] = &r->dmq1;
329 t[5] = &r->iqmp;
330 k = sizeof(BIGNUM) * 6;
331 off = k / sizeof(BN_ULONG) + 1;
332 j = 1;
333 for (i = 0; i < 6; i++)
334 j += (*t[i])->top;
335 if ((p = OPENSSL_malloc_locked((off + j) * sizeof(BN_ULONG))) == NULL) {
336 RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
337 return (0);
338 }
339 bn = (BIGNUM *)p;
340 ul = (BN_ULONG *)&(p[off]);
341 for (i = 0; i < 6; i++) {
342 b = *(t[i]);
343 *(t[i]) = &(bn[i]);
344 memcpy((char *)&(bn[i]), (char *)b, sizeof(BIGNUM));
345 bn[i].flags = BN_FLG_STATIC_DATA;
346 bn[i].d = ul;
347 memcpy((char *)ul, b->d, sizeof(BN_ULONG) * b->top);
348 ul += b->top;
349 BN_clear_free(b);
350 }
351
352 /* I should fix this so it can still be done */
353 r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
354
355 r->bignum_data = p;
356 return (1);
357 }
358