Line data Source code
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 1592 : RSA *RSA_new(void)
79 : {
80 1592 : RSA *r = RSA_new_method(NULL);
81 :
82 1592 : return r;
83 : }
84 :
85 0 : void RSA_set_default_method(const RSA_METHOD *meth)
86 : {
87 0 : default_RSA_meth = meth;
88 0 : }
89 :
90 0 : const RSA_METHOD *RSA_get_default_method(void)
91 : {
92 1592 : if (default_RSA_meth == NULL) {
93 : #ifdef OPENSSL_FIPS
94 : if (FIPS_mode())
95 : return FIPS_rsa_pkcs1_ssleay();
96 : else
97 : return RSA_PKCS1_SSLeay();
98 : #else
99 : # ifdef RSA_NULL
100 : default_RSA_meth = RSA_null_method();
101 : # else
102 124 : default_RSA_meth = RSA_PKCS1_SSLeay();
103 : # endif
104 : #endif
105 : }
106 :
107 1592 : return default_RSA_meth;
108 : }
109 :
110 0 : const RSA_METHOD *RSA_get_method(const RSA *rsa)
111 : {
112 0 : return rsa->meth;
113 : }
114 :
115 0 : int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
116 : {
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 : */
121 : const RSA_METHOD *mtmp;
122 0 : mtmp = rsa->meth;
123 0 : if (mtmp->finish)
124 0 : mtmp->finish(rsa);
125 : #ifndef OPENSSL_NO_ENGINE
126 0 : if (rsa->engine) {
127 0 : ENGINE_finish(rsa->engine);
128 0 : rsa->engine = NULL;
129 : }
130 : #endif
131 0 : rsa->meth = meth;
132 0 : if (meth->init)
133 0 : meth->init(rsa);
134 0 : return 1;
135 : }
136 :
137 1592 : RSA *RSA_new_method(ENGINE *engine)
138 : {
139 : RSA *ret;
140 :
141 1592 : ret = (RSA *)OPENSSL_malloc(sizeof(RSA));
142 1592 : if (ret == NULL) {
143 0 : RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
144 0 : return NULL;
145 : }
146 :
147 1592 : ret->meth = RSA_get_default_method();
148 : #ifndef OPENSSL_NO_ENGINE
149 1592 : if (engine) {
150 0 : if (!ENGINE_init(engine)) {
151 0 : RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
152 0 : OPENSSL_free(ret);
153 0 : return NULL;
154 : }
155 0 : ret->engine = engine;
156 : } else
157 1592 : ret->engine = ENGINE_get_default_RSA();
158 1592 : if (ret->engine) {
159 0 : ret->meth = ENGINE_get_RSA(ret->engine);
160 0 : if (!ret->meth) {
161 0 : RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
162 0 : ENGINE_finish(ret->engine);
163 0 : OPENSSL_free(ret);
164 0 : return NULL;
165 : }
166 : }
167 : #endif
168 :
169 1592 : ret->pad = 0;
170 1592 : ret->version = 0;
171 1592 : ret->n = NULL;
172 1592 : ret->e = NULL;
173 1592 : ret->d = NULL;
174 1592 : ret->p = NULL;
175 1592 : ret->q = NULL;
176 1592 : ret->dmp1 = NULL;
177 1592 : ret->dmq1 = NULL;
178 1592 : ret->iqmp = NULL;
179 1592 : ret->references = 1;
180 1592 : ret->_method_mod_n = NULL;
181 1592 : ret->_method_mod_p = NULL;
182 1592 : ret->_method_mod_q = NULL;
183 1592 : ret->blinding = NULL;
184 1592 : ret->mt_blinding = NULL;
185 1592 : ret->bignum_data = NULL;
186 1592 : ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
187 1592 : if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
188 : #ifndef OPENSSL_NO_ENGINE
189 0 : if (ret->engine)
190 0 : ENGINE_finish(ret->engine);
191 : #endif
192 0 : OPENSSL_free(ret);
193 0 : return (NULL);
194 : }
195 :
196 1592 : if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
197 : #ifndef OPENSSL_NO_ENGINE
198 0 : if (ret->engine)
199 0 : ENGINE_finish(ret->engine);
200 : #endif
201 0 : CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
202 0 : OPENSSL_free(ret);
203 : ret = NULL;
204 : }
205 1592 : return (ret);
206 : }
207 :
208 1617 : void RSA_free(RSA *r)
209 : {
210 : int i;
211 :
212 1617 : if (r == NULL)
213 : return;
214 :
215 1617 : i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA);
216 : #ifdef REF_PRINT
217 : REF_PRINT("RSA", r);
218 : #endif
219 1617 : if (i > 0)
220 : return;
221 : #ifdef REF_CHECK
222 : if (i < 0) {
223 : fprintf(stderr, "RSA_free, bad reference count\n");
224 : abort();
225 : }
226 : #endif
227 :
228 1592 : if (r->meth->finish)
229 1592 : r->meth->finish(r);
230 : #ifndef OPENSSL_NO_ENGINE
231 1592 : if (r->engine)
232 0 : ENGINE_finish(r->engine);
233 : #endif
234 :
235 1592 : CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
236 :
237 1592 : if (r->n != NULL)
238 1592 : BN_clear_free(r->n);
239 1592 : if (r->e != NULL)
240 1592 : BN_clear_free(r->e);
241 1592 : if (r->d != NULL)
242 450 : BN_clear_free(r->d);
243 1592 : if (r->p != NULL)
244 450 : BN_clear_free(r->p);
245 1592 : if (r->q != NULL)
246 450 : BN_clear_free(r->q);
247 1592 : if (r->dmp1 != NULL)
248 450 : BN_clear_free(r->dmp1);
249 1592 : if (r->dmq1 != NULL)
250 450 : BN_clear_free(r->dmq1);
251 1592 : if (r->iqmp != NULL)
252 450 : BN_clear_free(r->iqmp);
253 1592 : if (r->blinding != NULL)
254 345 : BN_BLINDING_free(r->blinding);
255 1592 : if (r->mt_blinding != NULL)
256 0 : BN_BLINDING_free(r->mt_blinding);
257 1592 : if (r->bignum_data != NULL)
258 0 : OPENSSL_free_locked(r->bignum_data);
259 1592 : OPENSSL_free(r);
260 : }
261 :
262 25 : int RSA_up_ref(RSA *r)
263 : {
264 25 : int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
265 : #ifdef REF_PRINT
266 : REF_PRINT("RSA", r);
267 : #endif
268 : #ifdef REF_CHECK
269 : if (i < 2) {
270 : fprintf(stderr, "RSA_up_ref, bad reference count\n");
271 : abort();
272 : }
273 : #endif
274 25 : return ((i > 1) ? 1 : 0);
275 : }
276 :
277 0 : int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
278 : CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
279 : {
280 0 : return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
281 : new_func, dup_func, free_func);
282 : }
283 :
284 0 : int RSA_set_ex_data(RSA *r, int idx, void *arg)
285 : {
286 0 : return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
287 : }
288 :
289 0 : void *RSA_get_ex_data(const RSA *r, int idx)
290 : {
291 0 : return (CRYPTO_get_ex_data(&r->ex_data, idx));
292 : }
293 :
294 0 : int RSA_memory_lock(RSA *r)
295 : {
296 : int i, j, k, off;
297 : char *p;
298 : BIGNUM *bn, **t[6], *b;
299 : BN_ULONG *ul;
300 :
301 0 : if (r->d == NULL)
302 : return (1);
303 0 : t[0] = &r->d;
304 0 : t[1] = &r->p;
305 0 : t[2] = &r->q;
306 0 : t[3] = &r->dmp1;
307 0 : t[4] = &r->dmq1;
308 0 : t[5] = &r->iqmp;
309 : k = sizeof(BIGNUM) * 6;
310 : off = k / sizeof(BN_ULONG) + 1;
311 : j = 1;
312 0 : for (i = 0; i < 6; i++)
313 0 : j += (*t[i])->top;
314 0 : if ((p = OPENSSL_malloc_locked((off + j) * sizeof(BN_ULONG))) == NULL) {
315 0 : RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
316 0 : return (0);
317 : }
318 : bn = (BIGNUM *)p;
319 0 : ul = (BN_ULONG *)&(p[off]);
320 0 : for (i = 0; i < 6; i++) {
321 0 : b = *(t[i]);
322 0 : *(t[i]) = &(bn[i]);
323 : memcpy((char *)&(bn[i]), (char *)b, sizeof(BIGNUM));
324 0 : bn[i].flags = BN_FLG_STATIC_DATA;
325 0 : bn[i].d = ul;
326 0 : memcpy((char *)ul, b->d, sizeof(BN_ULONG) * b->top);
327 0 : ul += b->top;
328 0 : BN_clear_free(b);
329 : }
330 :
331 : /* I should fix this so it can still be done */
332 0 : r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
333 :
334 0 : r->bignum_data = p;
335 0 : return (1);
336 : }
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