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