-/* crypto/ec/ec2_mult.c */
-/* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- *
- * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
- * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
- * to the OpenSSL project.
- *
- * The ECC Code is licensed pursuant to the OpenSSL open source
- * license provided below.
- *
- * The software is originally written by Sheueling Chang Shantz and
- * Douglas Stebila of Sun Microsystems Laboratories.
- *
- */
-/* ====================================================================
- * Copyright (c) 1998-2003 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 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
*
+ * Licensed under the OpenSSL license (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 <openssl/err.h>
BN_CTX *ctx)
{
BIGNUM *x1, *x2, *z1, *z2;
- int ret = 0, i;
+ int ret = 0, i, group_top;
BN_ULONG mask, word;
if (r == point) {
x2 = r->X;
z2 = r->Y;
- bn_wexpand(x1, bn_get_top(group->field));
- bn_wexpand(z1, bn_get_top(group->field));
- bn_wexpand(x2, bn_get_top(group->field));
- bn_wexpand(z2, bn_get_top(group->field));
+ group_top = bn_get_top(group->field);
+ if (bn_wexpand(x1, group_top) == NULL
+ || bn_wexpand(z1, group_top) == NULL
+ || bn_wexpand(x2, group_top) == NULL
+ || bn_wexpand(z2, group_top) == NULL)
+ goto err;
if (!BN_GF2m_mod_arr(x1, point->X, group->poly))
goto err; /* x1 = x */
for (; i >= 0; i--) {
word = bn_get_words(scalar)[i];
while (mask) {
- BN_consttime_swap(word & mask, x1, x2, bn_get_top(group->field));
- BN_consttime_swap(word & mask, z1, z2, bn_get_top(group->field));
+ BN_consttime_swap(word & mask, x1, x2, group_top);
+ BN_consttime_swap(word & mask, z1, z2, group_top);
if (!gf2m_Madd(group, point->X, x2, z2, x1, z1, ctx))
goto err;
if (!gf2m_Mdouble(group, x1, z1, ctx))
goto err;
- BN_consttime_swap(word & mask, x1, x2, bn_get_top(group->field));
- BN_consttime_swap(word & mask, z1, z2, bn_get_top(group->field));
+ BN_consttime_swap(word & mask, x1, x2, group_top);
+ BN_consttime_swap(word & mask, z1, z2, group_top);
mask >>= 1;
}
mask = BN_TBIT;
ret = 1;
err:
- if (p)
- EC_POINT_free(p);
- if (acc)
- EC_POINT_free(acc);
- if (new_ctx != NULL)
- BN_CTX_free(new_ctx);
+ EC_POINT_free(p);
+ EC_POINT_free(acc);
+ BN_CTX_free(new_ctx);
return ret;
}
projects / openssl.git / blobdiff