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