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30 lines
890 B
30 lines
890 B
10 years ago
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/************************ sha-private.h ************************/
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/***************** See RFC 6234 for details. *******************/
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#ifndef _SHA_PRIVATE__H
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#define _SHA_PRIVATE__H
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/*
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* These definitions are defined in FIPS 180-3, section 4.1.
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* Ch() and Maj() are defined identically in sections 4.1.1,
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* 4.1.2, and 4.1.3.
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*
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* The definitions used in FIPS 180-3 are as follows:
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*/
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#ifndef USE_MODIFIED_MACROS
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#define SHA_Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
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#define SHA_Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
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#else /* USE_MODIFIED_MACROS */
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/*
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* The following definitions are equivalent and potentially faster.
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*/
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#define SHA_Ch(x, y, z) (((x) & ((y) ^ (z))) ^ (z))
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#define SHA_Maj(x, y, z) (((x) & ((y) | (z))) | ((y) & (z)))
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#endif /* USE_MODIFIED_MACROS */
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#define SHA_Parity(x, y, z) ((x) ^ (y) ^ (z))
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#endif /* _SHA_PRIVATE__H */
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