source: azure_iot_hub_f767zi/trunk/azure_iot_sdk/c-utility/inc/azure_c_shared_utility/sha-private.h@ 457

Last change on this file since 457 was 457, checked in by coas-nagasima, 4 years ago

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1// Copyright (c) Microsoft. All rights reserved.
2// Licensed under the MIT license. See LICENSE file in the project root for full license information.
3
4/*************************** sha-private.h ***************************/
5/********************** See RFC 4634 for details *********************/
6#ifndef _SHA_PRIVATE__H
7#define _SHA_PRIVATE__H
8/*
9* These definitions are defined in FIPS-180-2, section 4.1.
10* Ch() and Maj() are defined identically in sections 4.1.1,
11* 4.1.2 and 4.1.3.
12*
13* The definitions used in FIPS-180-2 are as follows:
14*/
15
16#ifndef USE_MODIFIED_MACROS
17#define SHA_Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
18#define SHA_Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
19
20#else /* USE_MODIFIED_MACROS */
21/*
22* The following definitions are equivalent and potentially faster.
23*/
24
25#define SHA_Ch(x, y, z) (((x) & ((y) ^ (z))) ^ (z))
26#define SHA_Maj(x, y, z) (((x) & ((y) | (z))) | ((y) & (z)))
27
28#endif /* USE_MODIFIED_MACROS */
29
30#define SHA_Parity(x, y, z) ((x) ^ (y) ^ (z))
31
32#endif /* _SHA_PRIVATE__H */
33
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