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Add SHACAL2 optimizations 

Thanks to Botan for providing these
pull/461/head
Jeffrey Walton 2017-08-16 14:33:31 -04:00
parent c40a4dc9f7
commit b8e794cc6d
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GPG Key ID: B36AB348921B1838
2 changed files with 31 additions and 19 deletions
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48
shacal2.cpp
View File

@ -36,34 +36,46 @@ void SHACAL2_Enc_ProcessAndXorBlock_SHANI(const word32* subKeys, const byte *inB
CRYPTOPP_ASSERT(inBlock);
CRYPTOPP_ASSERT(outBlock);
// MASK1 produces the CDAB arrangement
const __m128i MASK1 = _mm_set_epi8(8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7);
__m128i B0 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(inBlock + 0)), MASK1);
// MASK2 produces the EFGH arrangement
const __m128i MASK2 = _mm_set_epi8(0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15);
__m128i B0 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(inBlock + 0)), MASK1);
__m128i B1 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(inBlock + 16)), MASK2);
__m128i TMP = _mm_alignr_epi8(B0, B1, 8); // ABEF
B1 = _mm_blend_epi16(B1, B0, 0xF0); // CDGH
__m128i TMP = _mm_alignr_epi8(B0, B1, 8);
B1 = _mm_blend_epi16(B1, B0, 0xF0);
B0 = TMP;
#if 0
// SSE2 + SSSE3, but 0.2 cpb slower on a Celeraon J3455
const __m128i MASK1 = _mm_set_epi8(8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7);
const __m128i MASK2 = _mm_set_epi8(0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15);
__m128i B0 = _mm_loadu_si128(CONST_M128_CAST(inBlock + 0));
__m128i B1 = _mm_loadu_si128(CONST_M128_CAST(inBlock + 16));
__m128i TMP = _mm_shuffle_epi8(_mm_unpacklo_epi64(B0, B1), MASK2);
B1 = _mm_shuffle_epi8(_mm_unpackhi_epi64(B0, B1), MASK2);
B0 = TMP;
#endif
const byte* keys = reinterpret_cast<const byte*>(subKeys);
for (size_t i = 0; i != 8; ++i)
{
B1 = _mm_sha256rnds2_epu32(B1, B0, _mm_set_epi32(0,0,subKeys[8*i+1],subKeys[8*i+0]));
B0 = _mm_sha256rnds2_epu32(B0, B1, _mm_set_epi32(0,0,subKeys[8*i+3],subKeys[8*i+2]));
B1 = _mm_sha256rnds2_epu32(B1, B0, _mm_set_epi32(0,0,subKeys[8*i+5],subKeys[8*i+4]));
B0 = _mm_sha256rnds2_epu32(B0, B1, _mm_set_epi32(0,0,subKeys[8*i+7],subKeys[8*i+6]));
const __m128i RK0 = _mm_load_si128(CONST_M128_CAST(keys + 32*i));
const __m128i RK2 = _mm_load_si128(CONST_M128_CAST(keys + 32*i+16));
const __m128i RK1 = _mm_srli_si128(RK0, 8);
const __m128i RK3 = _mm_srli_si128(RK2, 8);
B1 = _mm_sha256rnds2_epu32(B1, B0, RK0);
B0 = _mm_sha256rnds2_epu32(B0, B1, RK1);
B1 = _mm_sha256rnds2_epu32(B1, B0, RK2);
B0 = _mm_sha256rnds2_epu32(B0, B1, RK3);
}
TMP = _mm_shuffle_epi32(B0, 0x1B); // FEBA
B1 = _mm_shuffle_epi32(B1, 0xB1); // DCHG
B0 = _mm_blend_epi16(TMP, B1, 0xF0); // DCBA
B1 = _mm_alignr_epi8(B1, TMP, 8); // ABEF
const __m128i MASK3 = _mm_set_epi8(12,13,14,15, 8,9,10,11, 4,5,6,7, 0,1,2,3);
B0 = _mm_shuffle_epi8(B0, MASK3);
B1 = _mm_shuffle_epi8(B1, MASK3);
TMP = _mm_shuffle_epi8(_mm_unpackhi_epi64(B0, B1), MASK1);
B1 = _mm_shuffle_epi8(_mm_unpacklo_epi64(B0, B1), MASK1);
B0 = TMP;
if (xorBlock)
{

2
shacal2.h
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@ -33,7 +33,7 @@ class SHACAL2 : public SHACAL2_Info, public BlockCipherDocumentation
void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
protected:
FixedSizeSecBlock<word32, 64> m_key;
FixedSizeAlignedSecBlock<word32, 64> m_key;
static const word32 K[64];
};