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/*
* SHA-1 using SSE2
* (C) 2009-2010 Jack Lloyd
*
* Distributed under the terms of the Botan license
*
* Based on public domain code by Dean Gaudet
* (http://arctic.org/~dean/crypto/sha1.html)
*/
#include <botan/sha1_sse2.h>
#include <botan/rotate.h>
#include <emmintrin.h>
namespace Botan {
namespace {
/*
* First 16 bytes just need byte swapping. Preparing just means
* adding in the round constants.
*/
#define prep00_15(P, W) \
do { \
W = _mm_shufflehi_epi16(W, _MM_SHUFFLE(2, 3, 0, 1)); \
W = _mm_shufflelo_epi16(W, _MM_SHUFFLE(2, 3, 0, 1)); \
W = _mm_or_si128(_mm_slli_epi16(W, 8), \
_mm_srli_epi16(W, 8)); \
P.u128 = _mm_add_epi32(W, K00_19); \
} while(0)
/*
For each multiple of 4, t, we want to calculate this:
W[t+0] = rol(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16], 1);
W[t+1] = rol(W[t-2] ^ W[t-7] ^ W[t-13] ^ W[t-15], 1);
W[t+2] = rol(W[t-1] ^ W[t-6] ^ W[t-12] ^ W[t-14], 1);
W[t+3] = rol(W[t] ^ W[t-5] ^ W[t-11] ^ W[t-13], 1);
we'll actually calculate this:
W[t+0] = rol(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16], 1);
W[t+1] = rol(W[t-2] ^ W[t-7] ^ W[t-13] ^ W[t-15], 1);
W[t+2] = rol(W[t-1] ^ W[t-6] ^ W[t-12] ^ W[t-14], 1);
W[t+3] = rol( 0 ^ W[t-5] ^ W[t-11] ^ W[t-13], 1);
W[t+3] ^= rol(W[t+0], 1);
the parameters are:
W0 = &W[t-16];
W1 = &W[t-12];
W2 = &W[t- 8];
W3 = &W[t- 4];
and on output:
prepared = W0 + K
W0 = W[t]..W[t+3]
*/
/* note that there is a step here where i want to do a rol by 1, which
* normally would look like this:
*
* r1 = psrld r0,$31
* r0 = pslld r0,$1
* r0 = por r0,r1
*
* but instead i do this:
*
* r1 = pcmpltd r0,zero
* r0 = paddd r0,r0
* r0 = psub r0,r1
*
* because pcmpltd and paddd are availabe in both MMX units on
* efficeon, pentium-m, and opteron but shifts are available in
* only one unit.
*/
#define prep(prep, XW0, XW1, XW2, XW3, K) \
do { \
__m128i r0, r1, r2, r3; \
\
/* load W[t-4] 16-byte aligned, and shift */ \
r3 = _mm_srli_si128((XW3), 4); \
r0 = (XW0); \
/* get high 64-bits of XW0 into low 64-bits */ \
r1 = _mm_shuffle_epi32((XW0), _MM_SHUFFLE(1,0,3,2)); \
/* load high 64-bits of r1 */ \
r1 = _mm_unpacklo_epi64(r1, (XW1)); \
r2 = (XW2); \
\
r0 = _mm_xor_si128(r1, r0); \
r2 = _mm_xor_si128(r3, r2); \
r0 = _mm_xor_si128(r2, r0); \
/* unrotated W[t]..W[t+2] in r0 ... still need W[t+3] */ \
\
r2 = _mm_slli_si128(r0, 12); \
r1 = _mm_cmplt_epi32(r0, _mm_setzero_si128()); \
r0 = _mm_add_epi32(r0, r0); /* shift left by 1 */ \
r0 = _mm_sub_epi32(r0, r1); /* r0 has W[t]..W[t+2] */ \
\
r3 = _mm_srli_epi32(r2, 30); \
r2 = _mm_slli_epi32(r2, 2); \
\
r0 = _mm_xor_si128(r0, r3); \
r0 = _mm_xor_si128(r0, r2); /* r0 now has W[t+3] */ \
\
(XW0) = r0; \
(prep).u128 = _mm_add_epi32(r0, K); \
} while(0)
/*
* SHA-160 F1 Function
*/
inline void F1(u32bit A, u32bit& B, u32bit C, u32bit D, u32bit& E, u32bit msg)
{
E += (D ^ (B & (C ^ D))) + msg + rotate_left(A, 5);
B = rotate_left(B, 30);
}
/*
* SHA-160 F2 Function
*/
inline void F2(u32bit A, u32bit& B, u32bit C, u32bit D, u32bit& E, u32bit msg)
{
E += (B ^ C ^ D) + msg + rotate_left(A, 5);
B = rotate_left(B, 30);
}
/*
* SHA-160 F3 Function
*/
inline void F3(u32bit A, u32bit& B, u32bit C, u32bit D, u32bit& E, u32bit msg)
{
E += ((B & C) | ((B | C) & D)) + msg + rotate_left(A, 5);
B = rotate_left(B, 30);
}
/*
* SHA-160 F4 Function
*/
inline void F4(u32bit A, u32bit& B, u32bit C, u32bit D, u32bit& E, u32bit msg)
{
E += (B ^ C ^ D) + msg + rotate_left(A, 5);
B = rotate_left(B, 30);
}
}
/*
* SHA-160 Compression Function using SSE for message expansion
*/
void SHA_160_SSE2::compress_n(const byte input_bytes[], size_t blocks)
{
const __m128i K00_19 = _mm_set1_epi32(0x5A827999);
const __m128i K20_39 = _mm_set1_epi32(0x6ED9EBA1);
const __m128i K40_59 = _mm_set1_epi32(0x8F1BBCDC);
const __m128i K60_79 = _mm_set1_epi32(0xCA62C1D6);
u32bit A = digest[0],
B = digest[1],
C = digest[2],
D = digest[3],
E = digest[4];
const __m128i* input = reinterpret_cast<const __m128i*>(input_bytes);
for(size_t i = 0; i != blocks; ++i)
{
union v4si {
u32bit u32[4];
__m128i u128;
};
v4si P0, P1, P2, P3;
__m128i W0 = _mm_loadu_si128(&input[0]);
prep00_15(P0, W0);
__m128i W1 = _mm_loadu_si128(&input[1]);
prep00_15(P1, W1);
__m128i W2 = _mm_loadu_si128(&input[2]);
prep00_15(P2, W2);
__m128i W3 = _mm_loadu_si128(&input[3]);
prep00_15(P3, W3);
/*
Using SSE4; slower on Core2 and Nehalem
#define GET_P_32(P, i) _mm_extract_epi32(P.u128, i)
Much slower on all tested platforms
#define GET_P_32(P,i) _mm_cvtsi128_si32(_mm_srli_si128(P.u128, i*4))
*/
#define GET_P_32(P, i) P.u32[i]
F1(A, B, C, D, E, GET_P_32(P0, 0));
F1(E, A, B, C, D, GET_P_32(P0, 1));
F1(D, E, A, B, C, GET_P_32(P0, 2));
F1(C, D, E, A, B, GET_P_32(P0, 3));
prep(P0, W0, W1, W2, W3, K00_19);
F1(B, C, D, E, A, GET_P_32(P1, 0));
F1(A, B, C, D, E, GET_P_32(P1, 1));
F1(E, A, B, C, D, GET_P_32(P1, 2));
F1(D, E, A, B, C, GET_P_32(P1, 3));
prep(P1, W1, W2, W3, W0, K20_39);
F1(C, D, E, A, B, GET_P_32(P2, 0));
F1(B, C, D, E, A, GET_P_32(P2, 1));
F1(A, B, C, D, E, GET_P_32(P2, 2));
F1(E, A, B, C, D, GET_P_32(P2, 3));
prep(P2, W2, W3, W0, W1, K20_39);
F1(D, E, A, B, C, GET_P_32(P3, 0));
F1(C, D, E, A, B, GET_P_32(P3, 1));
F1(B, C, D, E, A, GET_P_32(P3, 2));
F1(A, B, C, D, E, GET_P_32(P3, 3));
prep(P3, W3, W0, W1, W2, K20_39);
F1(E, A, B, C, D, GET_P_32(P0, 0));
F1(D, E, A, B, C, GET_P_32(P0, 1));
F1(C, D, E, A, B, GET_P_32(P0, 2));
F1(B, C, D, E, A, GET_P_32(P0, 3));
prep(P0, W0, W1, W2, W3, K20_39);
F2(A, B, C, D, E, GET_P_32(P1, 0));
F2(E, A, B, C, D, GET_P_32(P1, 1));
F2(D, E, A, B, C, GET_P_32(P1, 2));
F2(C, D, E, A, B, GET_P_32(P1, 3));
prep(P1, W1, W2, W3, W0, K20_39);
F2(B, C, D, E, A, GET_P_32(P2, 0));
F2(A, B, C, D, E, GET_P_32(P2, 1));
F2(E, A, B, C, D, GET_P_32(P2, 2));
F2(D, E, A, B, C, GET_P_32(P2, 3));
prep(P2, W2, W3, W0, W1, K40_59);
F2(C, D, E, A, B, GET_P_32(P3, 0));
F2(B, C, D, E, A, GET_P_32(P3, 1));
F2(A, B, C, D, E, GET_P_32(P3, 2));
F2(E, A, B, C, D, GET_P_32(P3, 3));
prep(P3, W3, W0, W1, W2, K40_59);
F2(D, E, A, B, C, GET_P_32(P0, 0));
F2(C, D, E, A, B, GET_P_32(P0, 1));
F2(B, C, D, E, A, GET_P_32(P0, 2));
F2(A, B, C, D, E, GET_P_32(P0, 3));
prep(P0, W0, W1, W2, W3, K40_59);
F2(E, A, B, C, D, GET_P_32(P1, 0));
F2(D, E, A, B, C, GET_P_32(P1, 1));
F2(C, D, E, A, B, GET_P_32(P1, 2));
F2(B, C, D, E, A, GET_P_32(P1, 3));
prep(P1, W1, W2, W3, W0, K40_59);
F3(A, B, C, D, E, GET_P_32(P2, 0));
F3(E, A, B, C, D, GET_P_32(P2, 1));
F3(D, E, A, B, C, GET_P_32(P2, 2));
F3(C, D, E, A, B, GET_P_32(P2, 3));
prep(P2, W2, W3, W0, W1, K40_59);
F3(B, C, D, E, A, GET_P_32(P3, 0));
F3(A, B, C, D, E, GET_P_32(P3, 1));
F3(E, A, B, C, D, GET_P_32(P3, 2));
F3(D, E, A, B, C, GET_P_32(P3, 3));
prep(P3, W3, W0, W1, W2, K60_79);
F3(C, D, E, A, B, GET_P_32(P0, 0));
F3(B, C, D, E, A, GET_P_32(P0, 1));
F3(A, B, C, D, E, GET_P_32(P0, 2));
F3(E, A, B, C, D, GET_P_32(P0, 3));
prep(P0, W0, W1, W2, W3, K60_79);
F3(D, E, A, B, C, GET_P_32(P1, 0));
F3(C, D, E, A, B, GET_P_32(P1, 1));
F3(B, C, D, E, A, GET_P_32(P1, 2));
F3(A, B, C, D, E, GET_P_32(P1, 3));
prep(P1, W1, W2, W3, W0, K60_79);
F3(E, A, B, C, D, GET_P_32(P2, 0));
F3(D, E, A, B, C, GET_P_32(P2, 1));
F3(C, D, E, A, B, GET_P_32(P2, 2));
F3(B, C, D, E, A, GET_P_32(P2, 3));
prep(P2, W2, W3, W0, W1, K60_79);
F4(A, B, C, D, E, GET_P_32(P3, 0));
F4(E, A, B, C, D, GET_P_32(P3, 1));
F4(D, E, A, B, C, GET_P_32(P3, 2));
F4(C, D, E, A, B, GET_P_32(P3, 3));
prep(P3, W3, W0, W1, W2, K60_79);
F4(B, C, D, E, A, GET_P_32(P0, 0));
F4(A, B, C, D, E, GET_P_32(P0, 1));
F4(E, A, B, C, D, GET_P_32(P0, 2));
F4(D, E, A, B, C, GET_P_32(P0, 3));
F4(C, D, E, A, B, GET_P_32(P1, 0));
F4(B, C, D, E, A, GET_P_32(P1, 1));
F4(A, B, C, D, E, GET_P_32(P1, 2));
F4(E, A, B, C, D, GET_P_32(P1, 3));
F4(D, E, A, B, C, GET_P_32(P2, 0));
F4(C, D, E, A, B, GET_P_32(P2, 1));
F4(B, C, D, E, A, GET_P_32(P2, 2));
F4(A, B, C, D, E, GET_P_32(P2, 3));
F4(E, A, B, C, D, GET_P_32(P3, 0));
F4(D, E, A, B, C, GET_P_32(P3, 1));
F4(C, D, E, A, B, GET_P_32(P3, 2));
F4(B, C, D, E, A, GET_P_32(P3, 3));
A = (digest[0] += A);
B = (digest[1] += B);
C = (digest[2] += C);
D = (digest[3] += D);
E = (digest[4] += E);
input += (hash_block_size() / 16);
}
#undef GET_P_32
}
}
|
