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/*
* (C) 2023 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SHA2_64_F_H_
#define BOTAN_SHA2_64_F_H_
#include <botan/types.h>
#include <botan/internal/bit_ops.h>
#include <botan/internal/rotate.h>
namespace Botan {
/*
* SHA-512 F1 Function
*/
BOTAN_FORCE_INLINE void SHA2_64_F(uint64_t A,
uint64_t B,
uint64_t C,
uint64_t& D,
uint64_t E,
uint64_t F,
uint64_t G,
uint64_t& H,
uint64_t& M1,
uint64_t M2,
uint64_t M3,
uint64_t M4,
uint64_t magic) {
const uint64_t E_rho = rho<14, 18, 41>(E);
const uint64_t A_rho = rho<28, 34, 39>(A);
const uint64_t M2_sigma = sigma<19, 61, 6>(M2);
const uint64_t M4_sigma = sigma<1, 8, 7>(M4);
H += magic + E_rho + choose(E, F, G) + M1;
D += H;
H += A_rho + majority(A, B, C);
M1 += M2_sigma + M3 + M4_sigma;
}
/*
* SHA-512 F1 Function (No Message Expansion)
*/
BOTAN_FORCE_INLINE void SHA2_64_F(
uint64_t A, uint64_t B, uint64_t C, uint64_t& D, uint64_t E, uint64_t F, uint64_t G, uint64_t& H, uint64_t M) {
const uint64_t E_rho = rho<14, 18, 41>(E);
const uint64_t A_rho = rho<28, 34, 39>(A);
H += E_rho + choose(E, F, G) + M;
D += H;
H += A_rho + majority(A, B, C);
}
} // namespace Botan
#endif