1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
59 #include <openssl/crypto.h>
60 #include "internal/cryptlib.h"
61 #include <openssl/lhash.h>
62 #include "internal/bn_int.h"
63 #include <openssl/rsa.h>
64 #include <openssl/rand.h>
65 #ifndef OPENSSL_NO_ENGINE
66 # include <openssl/engine.h>
69 static const RSA_METHOD *default_RSA_meth = NULL;
73 RSA *r = RSA_new_method(NULL);
78 void RSA_set_default_method(const RSA_METHOD *meth)
80 default_RSA_meth = meth;
83 const RSA_METHOD *RSA_get_default_method(void)
85 if (default_RSA_meth == NULL) {
87 default_RSA_meth = RSA_null_method();
89 default_RSA_meth = RSA_PKCS1_OpenSSL();
93 return default_RSA_meth;
96 const RSA_METHOD *RSA_get_method(const RSA *rsa)
101 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
104 * NB: The caller is specifically setting a method, so it's not up to us
105 * to deal with which ENGINE it comes from.
107 const RSA_METHOD *mtmp;
111 #ifndef OPENSSL_NO_ENGINE
112 ENGINE_finish(rsa->engine);
121 RSA *RSA_new_method(ENGINE *engine)
125 ret = OPENSSL_zalloc(sizeof(*ret));
127 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
131 ret->meth = RSA_get_default_method();
132 #ifndef OPENSSL_NO_ENGINE
134 if (!ENGINE_init(engine)) {
135 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
139 ret->engine = engine;
141 ret->engine = ENGINE_get_default_RSA();
143 ret->meth = ENGINE_get_RSA(ret->engine);
144 if (ret->meth == NULL) {
145 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
146 ENGINE_finish(ret->engine);
154 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
155 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
156 #ifndef OPENSSL_NO_ENGINE
157 ENGINE_finish(ret->engine);
163 ret->lock = CRYPTO_THREAD_lock_new();
164 if (ret->lock == NULL) {
165 #ifndef OPENSSL_NO_ENGINE
166 ENGINE_finish(ret->engine);
168 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
173 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
181 void RSA_free(RSA *r)
188 CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
189 REF_PRINT_COUNT("RSA", r);
192 REF_ASSERT_ISNT(i < 0);
196 #ifndef OPENSSL_NO_ENGINE
197 ENGINE_finish(r->engine);
200 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
202 CRYPTO_THREAD_lock_free(r->lock);
209 BN_clear_free(r->dmp1);
210 BN_clear_free(r->dmq1);
211 BN_clear_free(r->iqmp);
212 BN_BLINDING_free(r->blinding);
213 BN_BLINDING_free(r->mt_blinding);
214 OPENSSL_free(r->bignum_data);
218 int RSA_up_ref(RSA *r)
222 if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
225 REF_PRINT_COUNT("RSA", r);
226 REF_ASSERT_ISNT(i < 2);
227 return ((i > 1) ? 1 : 0);
230 int RSA_set_ex_data(RSA *r, int idx, void *arg)
232 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
235 void *RSA_get_ex_data(const RSA *r, int idx)
237 return (CRYPTO_get_ex_data(&r->ex_data, idx));
240 int RSA_memory_lock(RSA *r)
244 BIGNUM *bn, **t[6], *b;
255 k = bn_sizeof_BIGNUM() * 6;
256 off = k / sizeof(BN_ULONG) + 1;
258 for (i = 0; i < 6; i++)
259 j += bn_get_top(*t[i]);
260 if ((p = OPENSSL_malloc((off + j) * sizeof(*p))) == NULL) {
261 RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
264 memset(p, 0, sizeof(*p) * (off + j));
266 ul = (BN_ULONG *)&(p[off]);
267 for (i = 0; i < 6; i++) {
269 *(t[i]) = bn_array_el(bn, i);
270 memcpy(bn_array_el(bn, i), b, bn_sizeof_BIGNUM());
271 memcpy(ul, bn_get_words(b), sizeof(*ul) * bn_get_top(b));
272 bn_set_static_words(bn_array_el(bn, i), ul, bn_get_top(b));
277 /* I should fix this so it can still be done */
278 r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
284 int RSA_security_bits(const RSA *rsa)
286 return BN_security_bits(BN_num_bits(rsa->n), -1);