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/*
* Threefish-512
* (C) 2013 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/threefish_avx2.h>
#include <immintrin.h>
namespace Botan {
namespace {
inline void interleave_epi64(__m256i& X0, __m256i& X1)
{
// interleave X0 and X1 qwords
// (X0,X1,X2,X3),(X4,X5,X6,X7) -> (X0,X2,X4,X6),(X1,X3,X5,X7)
const __m256i T0 = _mm256_unpacklo_epi64(X0, X1);
const __m256i T1 = _mm256_unpackhi_epi64(X0, X1);
X0 = _mm256_permute4x64_epi64(T0, _MM_SHUFFLE(3,1,2,0));
X1 = _mm256_permute4x64_epi64(T1, _MM_SHUFFLE(3,1,2,0));
}
inline void deinterleave_epi64(__m256i& X0, __m256i& X1)
{
const __m256i T0 = _mm256_permute4x64_epi64(X0, _MM_SHUFFLE(3,1,2,0));
const __m256i T1 = _mm256_permute4x64_epi64(X1, _MM_SHUFFLE(3,1,2,0));
X0 = _mm256_unpacklo_epi64(T0, T1);
X1 = _mm256_unpackhi_epi64(T0, T1);
}
// Threefish rotation constants
const __m256i ROTATE_1 = _mm256_set_epi64x(37,19,36,46);
const __m256i ROTATE_2 = _mm256_set_epi64x(42,14,27,33);
const __m256i ROTATE_3 = _mm256_set_epi64x(39,36,49,17);
const __m256i ROTATE_4 = _mm256_set_epi64x(56,54, 9,44);
const __m256i ROTATE_5 = _mm256_set_epi64x(24,34,30,39);
const __m256i ROTATE_6 = _mm256_set_epi64x(17,10,50,13);
const __m256i ROTATE_7 = _mm256_set_epi64x(43,39,29,25);
const __m256i ROTATE_8 = _mm256_set_epi64x(22,56,35, 8);
}
void Threefish_512_AVX2::encrypt_n(const byte in[], byte out[], size_t blocks) const
{
const u64bit* K = &get_K()[0];
const u64bit* T_64 = &get_T()[0];
#define THREEFISH_ROUND(X0,X1,SHL) \
do { \
const __m256i SHR = _mm256_sub_epi64(_mm256_set1_epi64x(64), SHL); \
X0 = _mm256_add_epi64(X0, X1); \
X1 = _mm256_or_si256(_mm256_sllv_epi64(X1, SHL), _mm256_srlv_epi64(X1, SHR)); \
X1 = _mm256_xor_si256(X1, X0); \
X0 = _mm256_permute4x64_epi64(X0, _MM_SHUFFLE(0, 3, 2, 1)); \
X1 = _mm256_permute4x64_epi64(X1, _MM_SHUFFLE(1, 2, 3, 0)); \
} while(0)
#define THREEFISH_INJECT_KEY(r, K0, K1, T0I, T1I) \
do { \
const __m256i T0 = _mm256_permute4x64_epi64(T, _MM_SHUFFLE(T0I, 0, 0, 0)); \
const __m256i T1 = _mm256_permute4x64_epi64(T, _MM_SHUFFLE(0, T1I, 0, 0)); \
X0 = _mm256_add_epi64(X0, K0); \
X1 = _mm256_add_epi64(X1, K1); \
X1 = _mm256_add_epi64(X1, R); \
R = _mm256_add_epi64(R, ONE); \
X0 = _mm256_add_epi64(X0, T0); \
X1 = _mm256_add_epi64(X1, T1); \
} while(0)
#define THREEFISH_8_ROUNDS(R1, R2, K1, K2, K3, T0, T1, T2) \
do { \
THREEFISH_ROUND(X0, X1, ROTATE_1); \
THREEFISH_ROUND(X0, X1, ROTATE_2); \
THREEFISH_ROUND(X0, X1, ROTATE_3); \
THREEFISH_ROUND(X0, X1, ROTATE_4); \
\
THREEFISH_INJECT_KEY(R1, K1, K2, T0, T1); \
\
THREEFISH_ROUND(X0, X1, ROTATE_5); \
THREEFISH_ROUND(X0, X1, ROTATE_6); \
THREEFISH_ROUND(X0, X1, ROTATE_7); \
THREEFISH_ROUND(X0, X1, ROTATE_8); \
\
THREEFISH_INJECT_KEY(R2, K2, K3, T2, T0); \
} while(0)
/*
v1.0 key schedule: 9 ymm registers (only need 2 or 3)
(0,1,2,3),(4,5,6,7) [8]
then mutating with vpermq
*/
const __m256i K0 = _mm256_set_epi64x(K[6], K[4], K[2], K[0]);
const __m256i K1 = _mm256_set_epi64x(K[7], K[5], K[3], K[1]);
const __m256i K2 = _mm256_set_epi64x(K[8], K[6], K[4], K[2]);
const __m256i K3 = _mm256_set_epi64x(K[0], K[7], K[5], K[3]);
const __m256i K4 = _mm256_set_epi64x(K[1], K[8], K[6], K[4]);
const __m256i K5 = _mm256_set_epi64x(K[2], K[0], K[7], K[5]);
const __m256i K6 = _mm256_set_epi64x(K[3], K[1], K[8], K[6]);
const __m256i K7 = _mm256_set_epi64x(K[4], K[2], K[0], K[7]);
const __m256i K8 = _mm256_set_epi64x(K[5], K[3], K[1], K[8]);
const __m256i ONE = _mm256_set_epi64x(1, 0, 0, 0);
const __m256i* in_mm = reinterpret_cast<const __m256i*>(in);
__m256i* out_mm = reinterpret_cast<__m256i*>(out);
for(size_t i = 0; i != blocks; ++i)
{
__m256i X0 = _mm256_loadu_si256(in_mm++);
__m256i X1 = _mm256_loadu_si256(in_mm++);
const __m256i T = _mm256_set_epi64x(T_64[0], T_64[1], T_64[2], 0);
__m256i R = _mm256_set1_epi64x(0);
interleave_epi64(X0, X1);
THREEFISH_INJECT_KEY(0, K0, K1, 2, 3);
THREEFISH_8_ROUNDS( 1, 2, K1,K2,K3, 1, 2, 3);
THREEFISH_8_ROUNDS( 3, 4, K3,K4,K5, 2, 3, 1);
THREEFISH_8_ROUNDS( 5, 6, K5,K6,K7, 3, 1, 2);
THREEFISH_8_ROUNDS( 7, 8, K7,K8,K0, 1, 2, 3);
THREEFISH_8_ROUNDS( 9, 10, K0,K1,K2, 2, 3, 1);
THREEFISH_8_ROUNDS(11, 12, K2,K3,K4, 3, 1, 2);
THREEFISH_8_ROUNDS(13, 14, K4,K5,K6, 1, 2, 3);
THREEFISH_8_ROUNDS(15, 16, K6,K7,K8, 2, 3, 1);
THREEFISH_8_ROUNDS(17, 18, K8,K0,K1, 3, 1, 2);
deinterleave_epi64(X0, X1);
_mm256_storeu_si256(out_mm++, X0);
_mm256_storeu_si256(out_mm++, X1);
}
#undef THREEFISH_8_ROUNDS
#undef THREEFISH_ROUND
#undef THREEFISH_INJECT_KEY
}
void Threefish_512_AVX2::decrypt_n(const byte in[], byte out[], size_t blocks) const
{
const u64bit* K = &get_K()[0];
const u64bit* T_64 = &get_T()[0];
#define THREEFISH_ROUND(X0,X1,SHR) \
do { \
const __m256i SHL = _mm256_sub_epi64(_mm256_set1_epi64x(64), SHR); \
X0 = _mm256_permute4x64_epi64(X0, _MM_SHUFFLE(2, 1, 0, 3)); \
X1 = _mm256_permute4x64_epi64(X1, _MM_SHUFFLE(1, 2, 3, 0)); \
X1 = _mm256_xor_si256(X1, X0); \
X1 = _mm256_or_si256(_mm256_sllv_epi64(X1, SHL), _mm256_srlv_epi64(X1, SHR)); \
X0 = _mm256_sub_epi64(X0, X1); \
} while(0)
#define THREEFISH_INJECT_KEY(r, K0, K1, T0I, T1I) \
do { \
const __m256i T0 = _mm256_permute4x64_epi64(T, _MM_SHUFFLE(T0I, 0, 0, 0)); \
const __m256i T1 = _mm256_permute4x64_epi64(T, _MM_SHUFFLE(0, T1I, 0, 0)); \
X0 = _mm256_sub_epi64(X0, K0); \
X1 = _mm256_sub_epi64(X1, K1); \
X1 = _mm256_sub_epi64(X1, R); \
R = _mm256_sub_epi64(R, ONE); \
X0 = _mm256_sub_epi64(X0, T0); \
X1 = _mm256_sub_epi64(X1, T1); \
} while(0)
#define THREEFISH_8_ROUNDS(R1, R2, K1, K2, K3, T0, T1, T2) \
do { \
THREEFISH_INJECT_KEY(R2, K2, K3, T2, T0); \
\
THREEFISH_ROUND(X0, X1, ROTATE_8); \
THREEFISH_ROUND(X0, X1, ROTATE_7); \
THREEFISH_ROUND(X0, X1, ROTATE_6); \
THREEFISH_ROUND(X0, X1, ROTATE_5); \
\
THREEFISH_INJECT_KEY(R1, K1, K2, T0, T1); \
THREEFISH_ROUND(X0, X1, ROTATE_4); \
THREEFISH_ROUND(X0, X1, ROTATE_3); \
THREEFISH_ROUND(X0, X1, ROTATE_2); \
THREEFISH_ROUND(X0, X1, ROTATE_1); \
} while(0)
/*
v1.0 key schedule: 9 ymm registers (only need 2 or 3)
(0,1,2,3),(4,5,6,7) [8]
then mutating with vpermq
*/
const __m256i K0 = _mm256_set_epi64x(K[6], K[4], K[2], K[0]);
const __m256i K1 = _mm256_set_epi64x(K[7], K[5], K[3], K[1]);
const __m256i K2 = _mm256_set_epi64x(K[8], K[6], K[4], K[2]);
const __m256i K3 = _mm256_set_epi64x(K[0], K[7], K[5], K[3]);
const __m256i K4 = _mm256_set_epi64x(K[1], K[8], K[6], K[4]);
const __m256i K5 = _mm256_set_epi64x(K[2], K[0], K[7], K[5]);
const __m256i K6 = _mm256_set_epi64x(K[3], K[1], K[8], K[6]);
const __m256i K7 = _mm256_set_epi64x(K[4], K[2], K[0], K[7]);
const __m256i K8 = _mm256_set_epi64x(K[5], K[3], K[1], K[8]);
const __m256i ONE = _mm256_set_epi64x(1, 0, 0, 0);
const __m256i* in_mm = reinterpret_cast<const __m256i*>(in);
__m256i* out_mm = reinterpret_cast<__m256i*>(out);
for(size_t i = 0; i != blocks; ++i)
{
__m256i X0 = _mm256_loadu_si256(in_mm++);
__m256i X1 = _mm256_loadu_si256(in_mm++);
const __m256i T = _mm256_set_epi64x(T_64[0], T_64[1], T_64[2], 0);
__m256i R = _mm256_set_epi64x(18, 0, 0, 0);
interleave_epi64(X0, X1);
THREEFISH_8_ROUNDS(17, 18, K8,K0,K1, 3, 1, 2);
THREEFISH_8_ROUNDS(15, 16, K6,K7,K8, 2, 3, 1);
THREEFISH_8_ROUNDS(13, 14, K4,K5,K6, 1, 2, 3);
THREEFISH_8_ROUNDS(11, 12, K2,K3,K4, 3, 1, 2);
THREEFISH_8_ROUNDS( 9, 10, K0,K1,K2, 2, 3, 1);
THREEFISH_8_ROUNDS( 7, 8, K7,K8,K0, 1, 2, 3);
THREEFISH_8_ROUNDS( 5, 6, K5,K6,K7, 3, 1, 2);
THREEFISH_8_ROUNDS( 3, 4, K3,K4,K5, 2, 3, 1);
THREEFISH_8_ROUNDS( 1, 2, K1,K2,K3, 1, 2, 3);
THREEFISH_INJECT_KEY(0, K0, K1, 2, 3);
deinterleave_epi64(X0, X1);
_mm256_storeu_si256(out_mm++, X0);
_mm256_storeu_si256(out_mm++, X1);
}
}
}
|
