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
113 ENGINE_finish(rsa->engine);
123 RSA *RSA_new_method(ENGINE *engine)
127 ret = OPENSSL_zalloc(sizeof(*ret));
129 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
133 ret->meth = RSA_get_default_method();
134 #ifndef OPENSSL_NO_ENGINE
136 if (!ENGINE_init(engine)) {
137 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
141 ret->engine = engine;
143 ret->engine = ENGINE_get_default_RSA();
145 ret->meth = ENGINE_get_RSA(ret->engine);
147 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
148 ENGINE_finish(ret->engine);
156 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
157 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
158 #ifndef OPENSSL_NO_ENGINE
160 ENGINE_finish(ret->engine);
166 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
167 #ifndef OPENSSL_NO_ENGINE
169 ENGINE_finish(ret->engine);
171 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
178 void RSA_free(RSA *r)
185 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA);
193 fprintf(stderr, "RSA_free, bad reference count\n");
200 #ifndef OPENSSL_NO_ENGINE
202 ENGINE_finish(r->engine);
205 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
212 BN_clear_free(r->dmp1);
213 BN_clear_free(r->dmq1);
214 BN_clear_free(r->iqmp);
215 BN_BLINDING_free(r->blinding);
216 BN_BLINDING_free(r->mt_blinding);
217 OPENSSL_free(r->bignum_data);
221 int RSA_up_ref(RSA *r)
223 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
229 fprintf(stderr, "RSA_up_ref, bad reference count\n");
233 return ((i > 1) ? 1 : 0);
236 int RSA_set_ex_data(RSA *r, int idx, void *arg)
238 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
241 void *RSA_get_ex_data(const RSA *r, int idx)
243 return (CRYPTO_get_ex_data(&r->ex_data, idx));
246 int RSA_memory_lock(RSA *r)
250 BIGNUM *bn, **t[6], *b;
261 k = bn_sizeof_BIGNUM() * 6;
262 off = k / sizeof(BN_ULONG) + 1;
264 for (i = 0; i < 6; i++)
265 j += bn_get_top(*t[i]);
266 if ((p = OPENSSL_malloc((off + j) * sizeof(*p))) == NULL) {
267 RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
270 memset(p, 0, sizeof(*p) * (off + j));
272 ul = (BN_ULONG *)&(p[off]);
273 for (i = 0; i < 6; i++) {
275 *(t[i]) = bn_array_el(bn, i);
276 memcpy(bn_array_el(bn, i), b, bn_sizeof_BIGNUM());
277 memcpy(ul, bn_get_words(b), sizeof(*ul) * bn_get_top(b));
278 bn_set_static_words(bn_array_el(bn, i), ul, bn_get_top(b));
283 /* I should fix this so it can still be done */
284 r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
290 int RSA_security_bits(const RSA *rsa)
292 return BN_security_bits(BN_num_bits(rsa->n), -1);