2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include <openssl/crypto.h>
12 #include "internal/cryptlib.h"
13 #include <openssl/lhash.h>
14 #include "internal/bn_int.h"
15 #include <openssl/rand.h>
16 #include <openssl/engine.h>
19 static const RSA_METHOD *default_RSA_meth = NULL;
23 RSA *r = RSA_new_method(NULL);
28 void RSA_set_default_method(const RSA_METHOD *meth)
30 default_RSA_meth = meth;
33 const RSA_METHOD *RSA_get_default_method(void)
35 if (default_RSA_meth == NULL) {
37 default_RSA_meth = RSA_null_method();
39 default_RSA_meth = RSA_PKCS1_OpenSSL();
43 return default_RSA_meth;
46 const RSA_METHOD *RSA_get_method(const RSA *rsa)
51 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
54 * NB: The caller is specifically setting a method, so it's not up to us
55 * to deal with which ENGINE it comes from.
57 const RSA_METHOD *mtmp;
61 #ifndef OPENSSL_NO_ENGINE
62 ENGINE_finish(rsa->engine);
71 RSA *RSA_new_method(ENGINE *engine)
75 ret = OPENSSL_zalloc(sizeof(*ret));
77 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
81 ret->meth = RSA_get_default_method();
82 #ifndef OPENSSL_NO_ENGINE
84 if (!ENGINE_init(engine)) {
85 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
91 ret->engine = ENGINE_get_default_RSA();
93 ret->meth = ENGINE_get_RSA(ret->engine);
94 if (ret->meth == NULL) {
95 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
96 ENGINE_finish(ret->engine);
104 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
105 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
106 #ifndef OPENSSL_NO_ENGINE
107 ENGINE_finish(ret->engine);
113 ret->lock = CRYPTO_THREAD_lock_new();
114 if (ret->lock == NULL) {
115 #ifndef OPENSSL_NO_ENGINE
116 ENGINE_finish(ret->engine);
118 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
123 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
131 void RSA_free(RSA *r)
138 CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
139 REF_PRINT_COUNT("RSA", r);
142 REF_ASSERT_ISNT(i < 0);
146 #ifndef OPENSSL_NO_ENGINE
147 ENGINE_finish(r->engine);
150 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
152 CRYPTO_THREAD_lock_free(r->lock);
159 BN_clear_free(r->dmp1);
160 BN_clear_free(r->dmq1);
161 BN_clear_free(r->iqmp);
162 BN_BLINDING_free(r->blinding);
163 BN_BLINDING_free(r->mt_blinding);
164 OPENSSL_free(r->bignum_data);
168 int RSA_up_ref(RSA *r)
172 if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
175 REF_PRINT_COUNT("RSA", r);
176 REF_ASSERT_ISNT(i < 2);
177 return ((i > 1) ? 1 : 0);
180 int RSA_set_ex_data(RSA *r, int idx, void *arg)
182 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
185 void *RSA_get_ex_data(const RSA *r, int idx)
187 return (CRYPTO_get_ex_data(&r->ex_data, idx));
190 int RSA_memory_lock(RSA *r)
194 BIGNUM *bn, **t[6], *b;
205 k = bn_sizeof_BIGNUM() * 6;
206 off = k / sizeof(BN_ULONG) + 1;
208 for (i = 0; i < 6; i++)
209 j += bn_get_top(*t[i]);
210 if ((p = OPENSSL_malloc((off + j) * sizeof(*p))) == NULL) {
211 RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
214 memset(p, 0, sizeof(*p) * (off + j));
216 ul = (BN_ULONG *)&(p[off]);
217 for (i = 0; i < 6; i++) {
219 *(t[i]) = bn_array_el(bn, i);
220 memcpy(bn_array_el(bn, i), b, bn_sizeof_BIGNUM());
221 memcpy(ul, bn_get_words(b), sizeof(*ul) * bn_get_top(b));
222 bn_set_static_words(bn_array_el(bn, i), ul, bn_get_top(b));
227 /* I should fix this so it can still be done */
228 r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
234 int RSA_security_bits(const RSA *rsa)
236 return BN_security_bits(BN_num_bits(rsa->n), -1);
239 int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
241 /* If the fields in r are NULL, the corresponding input
242 * parameters MUST be non-NULL for n and e. d may be
243 * left NULL (in case only the public key is used).
245 * It is an error to give the results from get0 on r
246 * as input parameters.
248 if (n == r->n || e == r->e
249 || (r->d != NULL && d == r->d))
268 int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q)
270 /* If the fields in r are NULL, the corresponding input
271 * parameters MUST be non-NULL.
273 * It is an error to give the results from get0 on r
274 * as input parameters.
276 if (p == r->p || q == r->q)
291 int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp)
293 /* If the fields in r are NULL, the corresponding input
294 * parameters MUST be non-NULL.
296 * It is an error to give the results from get0 on r
297 * as input parameters.
299 if (dmp1 == r->dmp1 || dmq1 == r->dmq1 || iqmp == r->iqmp)
318 void RSA_get0_key(const RSA *r, BIGNUM **n, BIGNUM **e, BIGNUM **d)
328 void RSA_get0_factors(const RSA *r, BIGNUM **p, BIGNUM **q)
336 void RSA_get0_crt_params(const RSA *r,
337 BIGNUM **dmp1, BIGNUM **dmq1, BIGNUM **iqmp)
347 void RSA_clear_flags(RSA *r, int flags)
352 int RSA_test_flags(const RSA *r, int flags)
354 return r->flags & flags;
357 void RSA_set_flags(RSA *r, int flags)
362 ENGINE *RSA_get0_engine(RSA *r)