Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.1 KB
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Line | |
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1 | /* $OpenBSD: timingsafe_bcmp.c,v 1.2 2014/06/10 04:17:37 deraadt Exp $ */ |
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2 | /* |
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3 | * Copyright (c) 2010 Damien Miller. All rights reserved. |
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4 | * |
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5 | * Permission to use, copy, modify, and distribute this software for any |
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6 | * purpose with or without fee is hereby granted, provided that the above |
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7 | * copyright notice and this permission notice appear in all copies. |
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8 | * |
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9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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16 | */ |
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17 | |
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18 | #include <string.h> |
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19 | |
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20 | int |
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21 | timingsafe_bcmp(const void *b1, const void *b2, size_t n) |
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22 | { |
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23 | const unsigned char *p1 = b1, *p2 = b2; |
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24 | int ret = 0; |
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25 | |
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26 | for (; n > 0; n--) |
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27 | ret |= *p1++ ^ *p2++; |
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28 | return (ret != 0); |
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29 | } |
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