1 /* crypto/rsa/rsa_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
60 #include <openssl/crypto.h>
61 #include "internal/cryptlib.h"
62 #include <openssl/lhash.h>
63 #include "internal/bn_int.h"
64 #include <openssl/rsa.h>
65 #include <openssl/rand.h>
66 #ifndef OPENSSL_NO_ENGINE
67 # include <openssl/engine.h>
70 static const RSA_METHOD *default_RSA_meth = NULL;
74 RSA *r = RSA_new_method(NULL);
79 void RSA_set_default_method(const RSA_METHOD *meth)
81 default_RSA_meth = meth;
84 const RSA_METHOD *RSA_get_default_method(void)
86 if (default_RSA_meth == NULL) {
88 default_RSA_meth = RSA_null_method();
90 default_RSA_meth = RSA_PKCS1_SSLeay();
94 return default_RSA_meth;
97 const RSA_METHOD *RSA_get_method(const RSA *rsa)
102 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
105 * NB: The caller is specifically setting a method, so it's not up to us
106 * to deal with which ENGINE it comes from.
108 const RSA_METHOD *mtmp;
112 #ifndef OPENSSL_NO_ENGINE
114 ENGINE_finish(rsa->engine);
124 RSA *RSA_new_method(ENGINE *engine)
128 ret = OPENSSL_zalloc(sizeof(*ret));
130 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
134 ret->meth = RSA_get_default_method();
135 #ifndef OPENSSL_NO_ENGINE
137 if (!ENGINE_init(engine)) {
138 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
142 ret->engine = engine;
144 ret->engine = ENGINE_get_default_RSA();
146 ret->meth = ENGINE_get_RSA(ret->engine);
148 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
149 ENGINE_finish(ret->engine);
157 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
158 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
159 #ifndef OPENSSL_NO_ENGINE
161 ENGINE_finish(ret->engine);
167 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
168 #ifndef OPENSSL_NO_ENGINE
170 ENGINE_finish(ret->engine);
172 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
179 void RSA_free(RSA *r)
186 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA);
194 fprintf(stderr, "RSA_free, bad reference count\n");
201 #ifndef OPENSSL_NO_ENGINE
203 ENGINE_finish(r->engine);
206 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
213 BN_clear_free(r->dmp1);
214 BN_clear_free(r->dmq1);
215 BN_clear_free(r->iqmp);
216 BN_BLINDING_free(r->blinding);
217 BN_BLINDING_free(r->mt_blinding);
218 OPENSSL_free(r->bignum_data);
222 int RSA_up_ref(RSA *r)
224 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
230 fprintf(stderr, "RSA_up_ref, bad reference count\n");
234 return ((i > 1) ? 1 : 0);
237 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
238 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
240 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
241 new_func, dup_func, free_func);
244 int RSA_set_ex_data(RSA *r, int idx, void *arg)
246 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
249 void *RSA_get_ex_data(const RSA *r, int idx)
251 return (CRYPTO_get_ex_data(&r->ex_data, idx));
254 int RSA_memory_lock(RSA *r)
258 BIGNUM *bn, **t[6], *b;
269 k = bn_sizeof_BIGNUM() * 6;
270 off = k / sizeof(BN_ULONG) + 1;
272 for (i = 0; i < 6; i++)
273 j += bn_get_top(*t[i]);
274 if ((p = OPENSSL_malloc((off + j) * sizeof(*p))) == NULL) {
275 RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
278 memset(p, 0, sizeof(*p) * (off + j));
280 ul = (BN_ULONG *)&(p[off]);
281 for (i = 0; i < 6; i++) {
283 *(t[i]) = bn_array_el(bn, i);
284 memcpy(bn_array_el(bn, i), b, bn_sizeof_BIGNUM());
285 memcpy(ul, bn_get_words(b), sizeof(*ul) * bn_get_top(b));
286 bn_set_static_words(bn_array_el(bn, i), ul, bn_get_top(b));
291 /* I should fix this so it can still be done */
292 r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
298 int RSA_security_bits(const RSA *rsa)
300 return BN_security_bits(BN_num_bits(rsa->n), -1);