-/* crypto/bn/bn_blind.c */
-/* ====================================================================
- * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+/*
+ * Copyright 1998-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#include "cryptlib.h"
+#include <openssl/opensslconf.h>
+#include "internal/cryptlib.h"
#include "bn_lcl.h"
#define BN_BLINDING_COUNTER 32
BIGNUM *Ai;
BIGNUM *e;
BIGNUM *mod; /* just a reference */
-#ifndef OPENSSL_NO_DEPRECATED
- unsigned long thread_id; /* added in OpenSSL 0.9.6j and 0.9.7b; used
- * only by crypto/rsa/rsa_eay.c, rsa_lib.c */
-#endif
- CRYPTO_THREADID tid;
+ CRYPTO_THREAD_ID tid;
int counter;
unsigned long flags;
BN_MONT_CTX *m_ctx;
int (*bn_mod_exp) (BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
+ CRYPTO_RWLOCK *lock;
};
BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod)
bn_check_top(mod);
- if ((ret = OPENSSL_malloc(sizeof(BN_BLINDING))) == NULL) {
+ if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
BNerr(BN_F_BN_BLINDING_NEW, ERR_R_MALLOC_FAILURE);
- return (NULL);
+ return NULL;
}
- memset(ret, 0, sizeof(BN_BLINDING));
+
+ ret->lock = CRYPTO_THREAD_lock_new();
+ if (ret->lock == NULL) {
+ BNerr(BN_F_BN_BLINDING_NEW, ERR_R_MALLOC_FAILURE);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ BN_BLINDING_set_current_thread(ret);
+
if (A != NULL) {
if ((ret->A = BN_dup(A)) == NULL)
goto err;
}
+
if (Ai != NULL) {
if ((ret->Ai = BN_dup(Ai)) == NULL)
goto err;
/* save a copy of mod in the BN_BLINDING structure */
if ((ret->mod = BN_dup(mod)) == NULL)
goto err;
+
if (BN_get_flags(mod, BN_FLG_CONSTTIME) != 0)
BN_set_flags(ret->mod, BN_FLG_CONSTTIME);
* use.
*/
ret->counter = -1;
- CRYPTO_THREADID_current(&ret->tid);
- return (ret);
+
+ return ret;
+
err:
- if (ret != NULL)
- BN_BLINDING_free(ret);
- return (NULL);
+ BN_BLINDING_free(ret);
+ return NULL;
}
void BN_BLINDING_free(BN_BLINDING *r)
{
if (r == NULL)
return;
-
- if (r->A != NULL)
- BN_free(r->A);
- if (r->Ai != NULL)
- BN_free(r->Ai);
- if (r->e != NULL)
- BN_free(r->e);
- if (r->mod != NULL)
- BN_free(r->mod);
+ BN_free(r->A);
+ BN_free(r->Ai);
+ BN_free(r->e);
+ BN_free(r->mod);
+ CRYPTO_THREAD_lock_free(r->lock);
OPENSSL_free(r);
}
if (!BN_BLINDING_create_param(b, NULL, NULL, ctx, NULL, NULL))
goto err;
} else if (!(b->flags & BN_BLINDING_NO_UPDATE)) {
- if (!BN_mod_mul(b->A, b->A, b->A, b->mod, ctx))
- goto err;
- if (!BN_mod_mul(b->Ai, b->Ai, b->Ai, b->mod, ctx))
- goto err;
+ if (b->m_ctx != NULL) {
+ if (!bn_mul_mont_fixed_top(b->Ai, b->Ai, b->Ai, b->m_ctx, ctx)
+ || !bn_mul_mont_fixed_top(b->A, b->A, b->A, b->m_ctx, ctx))
+ goto err;
+ } else {
+ if (!BN_mod_mul(b->Ai, b->Ai, b->Ai, b->mod, ctx)
+ || !BN_mod_mul(b->A, b->A, b->A, b->mod, ctx))
+ goto err;
+ }
}
ret = 1;
err:
if (b->counter == BN_BLINDING_COUNTER)
b->counter = 0;
- return (ret);
+ return ret;
}
int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx)
if ((b->A == NULL) || (b->Ai == NULL)) {
BNerr(BN_F_BN_BLINDING_CONVERT_EX, BN_R_NOT_INITIALIZED);
- return (0);
+ return 0;
}
if (b->counter == -1)
/* Fresh blinding, doesn't need updating. */
b->counter = 0;
else if (!BN_BLINDING_update(b, ctx))
- return (0);
+ return 0;
- if (r != NULL) {
- if (!BN_copy(r, b->Ai))
- ret = 0;
- }
+ if (r != NULL && (BN_copy(r, b->Ai) == NULL))
+ return 0;
- if (!BN_mod_mul(n, n, b->A, b->mod, ctx))
- ret = 0;
+ if (b->m_ctx != NULL)
+ ret = BN_mod_mul_montgomery(n, n, b->A, b->m_ctx, ctx);
+ else
+ ret = BN_mod_mul(n, n, b->A, b->mod, ctx);
return ret;
}
bn_check_top(n);
- if (r != NULL)
- ret = BN_mod_mul(n, n, r, b->mod, ctx);
- else {
- if (b->Ai == NULL) {
- BNerr(BN_F_BN_BLINDING_INVERT_EX, BN_R_NOT_INITIALIZED);
- return (0);
+ if (r == NULL && (r = b->Ai) == NULL) {
+ BNerr(BN_F_BN_BLINDING_INVERT_EX, BN_R_NOT_INITIALIZED);
+ return 0;
+ }
+
+ if (b->m_ctx != NULL) {
+ /* ensure that BN_mod_mul_montgomery takes pre-defined path */
+ if (n->dmax >= r->top) {
+ size_t i, rtop = r->top, ntop = n->top;
+ BN_ULONG mask;
+
+ for (i = 0; i < rtop; i++) {
+ mask = (BN_ULONG)0 - ((i - ntop) >> (8 * sizeof(i) - 1));
+ n->d[i] &= mask;
+ }
+ mask = (BN_ULONG)0 - ((rtop - ntop) >> (8 * sizeof(ntop) - 1));
+ /* always true, if (rtop >= ntop) n->top = r->top; */
+ n->top = (int)(rtop & ~mask) | (ntop & mask);
+ n->flags |= (BN_FLG_FIXED_TOP & ~mask);
}
- ret = BN_mod_mul(n, n, b->Ai, b->mod, ctx);
+ ret = BN_mod_mul_montgomery(n, n, r, b->m_ctx, ctx);
+ } else {
+ ret = BN_mod_mul(n, n, r, b->mod, ctx);
}
bn_check_top(n);
- return (ret);
+ return ret;
+}
+
+int BN_BLINDING_is_current_thread(BN_BLINDING *b)
+{
+ return CRYPTO_THREAD_compare_id(CRYPTO_THREAD_get_current_id(), b->tid);
}
-#ifndef OPENSSL_NO_DEPRECATED
-unsigned long BN_BLINDING_get_thread_id(const BN_BLINDING *b)
+void BN_BLINDING_set_current_thread(BN_BLINDING *b)
{
- return b->thread_id;
+ b->tid = CRYPTO_THREAD_get_current_id();
}
-void BN_BLINDING_set_thread_id(BN_BLINDING *b, unsigned long n)
+int BN_BLINDING_lock(BN_BLINDING *b)
{
- b->thread_id = n;
+ return CRYPTO_THREAD_write_lock(b->lock);
}
-#endif
-CRYPTO_THREADID *BN_BLINDING_thread_id(BN_BLINDING *b)
+int BN_BLINDING_unlock(BN_BLINDING *b)
{
- return &b->tid;
+ return CRYPTO_THREAD_unlock(b->lock);
}
unsigned long BN_BLINDING_get_flags(const BN_BLINDING *b)
goto err;
if (e != NULL) {
- if (ret->e != NULL)
- BN_free(ret->e);
+ BN_free(ret->e);
ret->e = BN_dup(e);
}
if (ret->e == NULL)
do {
int rv;
- if (!BN_rand_range(ret->A, ret->mod))
+ if (!BN_priv_rand_range(ret->A, ret->mod))
goto err;
- if (!int_bn_mod_inverse(ret->Ai, ret->A, ret->mod, ctx, &rv)) {
- /*
- * this should almost never happen for good RSA keys
- */
- if (rv) {
- if (retry_counter-- == 0) {
- BNerr(BN_F_BN_BLINDING_CREATE_PARAM,
- BN_R_TOO_MANY_ITERATIONS);
- goto err;
- }
- } else
- goto err;
- } else
+ if (int_bn_mod_inverse(ret->Ai, ret->A, ret->mod, ctx, &rv))
break;
+
+ /*
+ * this should almost never happen for good RSA keys
+ */
+ if (!rv)
+ goto err;
+
+ if (retry_counter-- == 0) {
+ BNerr(BN_F_BN_BLINDING_CREATE_PARAM, BN_R_TOO_MANY_ITERATIONS);
+ goto err;
+ }
} while (1);
if (ret->bn_mod_exp != NULL && ret->m_ctx != NULL) {
- if (!ret->bn_mod_exp
- (ret->A, ret->A, ret->e, ret->mod, ctx, ret->m_ctx))
+ if (!ret->bn_mod_exp(ret->A, ret->A, ret->e, ret->mod, ctx, ret->m_ctx))
goto err;
} else {
if (!BN_mod_exp(ret->A, ret->A, ret->e, ret->mod, ctx))
goto err;
}
+ if (ret->m_ctx != NULL) {
+ if (!bn_to_mont_fixed_top(ret->Ai, ret->Ai, ret->m_ctx, ctx)
+ || !bn_to_mont_fixed_top(ret->A, ret->A, ret->m_ctx, ctx))
+ goto err;
+ }
+
return ret;
err:
- if (b == NULL && ret != NULL) {
+ if (b == NULL) {
BN_BLINDING_free(ret);
ret = NULL;
}
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