-/* ====================================================================
- * Copyright (c) 1998-2014 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 2014-2018 The OpenSSL Project Authors. All Rights Reserved.
*
+ * 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 "internal/cryptlib.h"
#include "bn_lcl.h"
/*
signed char *bn_compute_wNAF(const BIGNUM *scalar, int w, size_t *ret_len)
{
int window_val;
- int ok = 0;
signed char *r = NULL;
int sign = 1;
int bit, next_bit, mask;
if (BN_is_zero(scalar)) {
r = OPENSSL_malloc(1);
- if (!r) {
+ if (r == NULL) {
BNerr(BN_F_BN_COMPUTE_WNAF, ERR_R_MALLOC_FAILURE);
goto err;
}
return r;
}
- if (w <= 0 || w > 7) { /* 'signed char' can represent integers with absolute values less than 2^7 */
+ if (w <= 0 || w > 7) { /* 'signed char' can represent integers with
+ * absolute values less than 2^7 */
BNerr(BN_F_BN_COMPUTE_WNAF, ERR_R_INTERNAL_ERROR);
goto err;
}
- bit = 1 << w; /* at most 128 */
- next_bit = bit << 1; /* at most 256 */
- mask = next_bit - 1; /* at most 255 */
+ bit = 1 << w; /* at most 128 */
+ next_bit = bit << 1; /* at most 256 */
+ mask = next_bit - 1; /* at most 255 */
if (BN_is_negative(scalar)) {
sign = -1;
}
window_val = scalar->d[0] & mask;
j = 0;
- while ((window_val != 0) || (j + w + 1 < len)) { /* if j+w+1 >= len, window_val will not increase */
+ while ((window_val != 0) || (j + w + 1 < len)) { /* if j+w+1 >= len,
+ * window_val will not
+ * increase */
int digit = 0;
/* 0 <= window_val <= 2^(w+1) */
if (window_val & bit) {
digit = window_val - next_bit; /* -2^w < digit < 0 */
-#if 1 /* modified wNAF */
+#if 1 /* modified wNAF */
if (j + w + 1 >= len) {
/*
* Special case for generating modified wNAFs:
window_val -= digit;
- /* now window_val is 0 or 2^(w+1) in standard wNAF generation;
+ /*
+ * now window_val is 0 or 2^(w+1) in standard wNAF generation;
* for modified window NAFs, it may also be 2^w
*/
- if (window_val != 0 && window_val != next_bit && window_val != bit) {
+ if (window_val != 0 && window_val != next_bit
+ && window_val != bit) {
BNerr(BN_F_BN_COMPUTE_WNAF, ERR_R_INTERNAL_ERROR);
goto err;
}
BNerr(BN_F_BN_COMPUTE_WNAF, ERR_R_INTERNAL_ERROR);
goto err;
}
- len = j;
- ok = 1;
+ *ret_len = j;
+ return r;
err:
- if (!ok) {
- OPENSSL_free(r);
- r = NULL;
- }
- if (ok)
- *ret_len = len;
- return r;
+ OPENSSL_free(r);
+ return NULL;
}
int bn_get_top(const BIGNUM *a)
return a->top;
}
-void bn_set_top(BIGNUM *a, int top)
-{
- a->top = top;
-}
-
int bn_get_dmax(const BIGNUM *a)
{
return a->dmax;
{
int i;
- for (i = a->top; i < a->dmax; i++) a->d[i] = 0;
+ for (i = a->top; i < a->dmax; i++)
+ a->d[i] = 0;
}
int bn_copy_words(BN_ULONG *out, const BIGNUM *in, int size)
if (in->top > size)
return 0;
- memset(out, 0, sizeof(BN_ULONG) * size);
- memcpy(out, in->d, sizeof(BN_ULONG) * in->top);
+ memset(out, 0, sizeof(*out) * size);
+ if (in->d != NULL)
+ memcpy(out, in->d, sizeof(*out) * in->top);
return 1;
}
return a->d;
}
-void bn_set_static_words(BIGNUM *a, BN_ULONG *words, int size)
+void bn_set_static_words(BIGNUM *a, const BN_ULONG *words, int size)
{
- a->d = words;
+ /*
+ * |const| qualifier omission is compensated by BN_FLG_STATIC_DATA
+ * flag, which effectively means "read-only data".
+ */
+ a->d = (BN_ULONG *)words;
a->dmax = a->top = size;
a->neg = 0;
a->flags |= BN_FLG_STATIC_DATA;
+ bn_correct_top(a);
}
-void bn_set_data(BIGNUM *a, const void *data, size_t size)
+int bn_set_words(BIGNUM *a, const BN_ULONG *words, int num_words)
{
- memcpy(a->d, data, size);
-}
-
-size_t bn_sizeof_BIGNUM(void)
-{
- return sizeof(BIGNUM);
-}
+ if (bn_wexpand(a, num_words) == NULL) {
+ BNerr(BN_F_BN_SET_WORDS, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
-BIGNUM *bn_array_el(BIGNUM *base, int el)
-{
- return &base[el];
+ memcpy(a->d, words, sizeof(BN_ULONG) * num_words);
+ a->top = num_words;
+ bn_correct_top(a);
+ return 1;
}
-
-
-
projects / openssl.git / blobdiff