| 1 | /************************ sha-private.h ************************/ |
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| 2 | /***************** See RFC 6234 for details. *******************/ |
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| 3 | #ifndef _SHA_PRIVATE__H |
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| 4 | #define _SHA_PRIVATE__H |
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| 5 | /* |
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| 6 | * These definitions are defined in FIPS 180-3, section 4.1. |
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| 7 | * Ch() and Maj() are defined identically in sections 4.1.1, |
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| 8 | * 4.1.2, and 4.1.3. |
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| 9 | * |
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| 10 | * The definitions used in FIPS 180-3 are as follows: |
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| 11 | */ |
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| 12 | |
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| 13 | #ifndef USE_MODIFIED_MACROS |
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| 14 | #define SHA_Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) |
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| 15 | #define SHA_Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) |
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| 16 | #else /* USE_MODIFIED_MACROS */ |
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| 17 | /* |
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| 18 | * The following definitions are equivalent and potentially faster. |
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| 19 | */ |
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| 20 | |
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| 21 | #define SHA_Ch(x, y, z) (((x) & ((y) ^ (z))) ^ (z)) |
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| 22 | #define SHA_Maj(x, y, z) (((x) & ((y) | (z))) | ((y) & (z))) |
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| 23 | |
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| 24 | #endif /* USE_MODIFIED_MACROS */ |
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| 25 | |
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| 26 | #define SHA_Parity(x, y, z) ((x) ^ (y) ^ (z)) |
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| 27 | |
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| 28 | #endif /* _SHA_PRIVATE__H */ |
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| 29 | |
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