diff options
Diffstat (limited to 'freebsd/crypto/openssl/crypto/bn/bn_shift.c')
| -rw-r--r-- | freebsd/crypto/openssl/crypto/bn/bn_shift.c | 99 |
1 files changed, 25 insertions, 74 deletions
diff --git a/freebsd/crypto/openssl/crypto/bn/bn_shift.c b/freebsd/crypto/openssl/crypto/bn/bn_shift.c index ed2980dc..a619eb55 100644 --- a/freebsd/crypto/openssl/crypto/bn/bn_shift.c +++ b/freebsd/crypto/openssl/crypto/bn/bn_shift.c @@ -1,65 +1,15 @@ #include <machine/rtems-bsd-user-space.h> -/* crypto/bn/bn_shift.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" int BN_lshift1(BIGNUM *r, const BIGNUM *a) @@ -73,11 +23,11 @@ int BN_lshift1(BIGNUM *r, const BIGNUM *a) if (r != a) { r->neg = a->neg; if (bn_wexpand(r, a->top + 1) == NULL) - return (0); + return 0; r->top = a->top; } else { if (bn_wexpand(r, a->top + 1) == NULL) - return (0); + return 0; } ap = a->d; rp = r->d; @@ -92,7 +42,7 @@ int BN_lshift1(BIGNUM *r, const BIGNUM *a) r->top++; } bn_check_top(r); - return (1); + return 1; } int BN_rshift1(BIGNUM *r, const BIGNUM *a) @@ -105,14 +55,14 @@ int BN_rshift1(BIGNUM *r, const BIGNUM *a) if (BN_is_zero(a)) { BN_zero(r); - return (1); + return 1; } i = a->top; ap = a->d; j = i - (ap[i - 1] == 1); if (a != r) { if (bn_wexpand(r, j) == NULL) - return (0); + return 0; r->neg = a->neg; } rp = r->d; @@ -126,8 +76,10 @@ int BN_rshift1(BIGNUM *r, const BIGNUM *a) c = (t & 1) ? BN_TBIT : 0; } r->top = j; + if (!r->top) + r->neg = 0; /* don't allow negative zero */ bn_check_top(r); - return (1); + return 1; } int BN_lshift(BIGNUM *r, const BIGNUM *a, int n) @@ -144,10 +96,10 @@ int BN_lshift(BIGNUM *r, const BIGNUM *a, int n) return 0; } - r->neg = a->neg; nw = n / BN_BITS2; if (bn_wexpand(r, a->top + nw + 1) == NULL) - return (0); + return 0; + r->neg = a->neg; lb = n % BN_BITS2; rb = BN_BITS2 - lb; f = a->d; @@ -162,14 +114,11 @@ int BN_lshift(BIGNUM *r, const BIGNUM *a, int n) t[nw + i + 1] |= (l >> rb) & BN_MASK2; t[nw + i] = (l << lb) & BN_MASK2; } - memset(t, 0, nw * sizeof(t[0])); - /* - * for (i=0; i<nw; i++) t[i]=0; - */ + memset(t, 0, sizeof(*t) * nw); r->top = a->top + nw + 1; bn_correct_top(r); bn_check_top(r); - return (1); + return 1; } int BN_rshift(BIGNUM *r, const BIGNUM *a, int n) @@ -191,13 +140,13 @@ int BN_rshift(BIGNUM *r, const BIGNUM *a, int n) lb = BN_BITS2 - rb; if (nw >= a->top || a->top == 0) { BN_zero(r); - return (1); + return 1; } i = (BN_num_bits(a) - n + (BN_BITS2 - 1)) / BN_BITS2; if (r != a) { - r->neg = a->neg; if (bn_wexpand(r, i) == NULL) - return (0); + return 0; + r->neg = a->neg; } else { if (n == 0) return 1; /* or the copying loop will go berserk */ @@ -221,6 +170,8 @@ int BN_rshift(BIGNUM *r, const BIGNUM *a, int n) if ((l = (l >> rb) & BN_MASK2)) *(t) = l; } + if (!r->top) + r->neg = 0; /* don't allow negative zero */ bn_check_top(r); - return (1); + return 1; } |