diff options
Diffstat (limited to 'crypto/bn/bn_word.c')
| -rw-r--r-- | crypto/bn/bn_word.c | 84 |
1 files changed, 18 insertions, 66 deletions
diff --git a/crypto/bn/bn_word.c b/crypto/bn/bn_word.c index 9b5f9cb98c3a..262d7668fcd4 100644 --- a/crypto/bn/bn_word.c +++ b/crypto/bn/bn_word.c @@ -1,63 +1,13 @@ -/* crypto/bn/bn_word.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2016 The OpenSSL Project Authors. 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 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 <stdio.h> -#include "cryptlib.h" +#include "internal/cryptlib.h" #include "bn_lcl.h" BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w) @@ -105,7 +55,7 @@ BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w) (BN_ULLONG) w); #endif } - return ((BN_ULONG)ret); + return (BN_ULONG)ret; } BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w) @@ -139,8 +89,10 @@ BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w) if ((a->top > 0) && (a->d[a->top - 1] == 0)) a->top--; ret >>= j; + if (!a->top) + a->neg = 0; /* don't allow negative zero */ bn_check_top(a); - return (ret); + return ret; } int BN_add_word(BIGNUM *a, BN_ULONG w) @@ -163,7 +115,7 @@ int BN_add_word(BIGNUM *a, BN_ULONG w) i = BN_sub_word(a, w); if (!BN_is_zero(a)) a->neg = !(a->neg); - return (i); + return i; } for (i = 0; w != 0 && i < a->top; i++) { a->d[i] = l = (a->d[i] + w) & BN_MASK2; @@ -176,7 +128,7 @@ int BN_add_word(BIGNUM *a, BN_ULONG w) a->d[i] = w; } bn_check_top(a); - return (1); + return 1; } int BN_sub_word(BIGNUM *a, BN_ULONG w) @@ -201,13 +153,13 @@ int BN_sub_word(BIGNUM *a, BN_ULONG w) a->neg = 0; i = BN_add_word(a, w); a->neg = 1; - return (i); + return i; } if ((a->top == 1) && (a->d[0] < w)) { a->d[0] = w - a->d[0]; a->neg = 1; - return (1); + return 1; } i = 0; for (;;) { @@ -223,7 +175,7 @@ int BN_sub_word(BIGNUM *a, BN_ULONG w) if ((a->d[i] == 0) && (i == (a->top - 1))) a->top--; bn_check_top(a); - return (1); + return 1; } int BN_mul_word(BIGNUM *a, BN_ULONG w) @@ -239,11 +191,11 @@ int BN_mul_word(BIGNUM *a, BN_ULONG w) ll = bn_mul_words(a->d, a->d, a->top, w); if (ll) { if (bn_wexpand(a, a->top + 1) == NULL) - return (0); + return 0; a->d[a->top++] = ll; } } } bn_check_top(a); - return (1); + return 1; } |