diff options
author | Andy Polyakov <appro@openssl.org> | 2017-05-29 17:12:54 +0200 |
---|---|---|
committer | Andy Polyakov <appro@openssl.org> | 2017-05-30 19:52:50 +0200 |
commit | 0dd0be9408a4f20941c7ec23b4634cdf6402f573 (patch) | |
tree | fa156d7dda86f454b58a0e1bbcc3a0e4824ecc60 /crypto/sha | |
parent | 2bcb232ebeb155c6f1241deb84a26ab23176f866 (diff) |
sha/keccak1600.c: implement bit interleaving optimization.
This targets 32-bit processors and is discussed in section 2.1 of
"Keccak implementation overview".
Reviewed-by: Rich Salz <rsalz@openssl.org>
Diffstat (limited to 'crypto/sha')
-rw-r--r-- | crypto/sha/keccak1600.c | 181 |
1 files changed, 103 insertions, 78 deletions
diff --git a/crypto/sha/keccak1600.c b/crypto/sha/keccak1600.c index 9deba8f12a..2682fdb1db 100644 --- a/crypto/sha/keccak1600.c +++ b/crypto/sha/keccak1600.c @@ -11,8 +11,67 @@ #include <string.h> #include <assert.h> -#define ROL64(a, offset) ((offset) ? (((a) << offset) | ((a) >> (64-offset))) \ - : a) +#define ROL32(a, offset) (((a) << (offset)) | ((a) >> ((32 - (offset)) & 31))) + +static uint64_t ROL64(uint64_t val, int offset) +{ + if (offset == 0) { + return val; + } else if (sizeof(void *) == 8) { + return (val << offset) | (val >> (64-offset)); + } else { + uint32_t hi = (uint32_t)(val >> 32), lo = (uint32_t)val; + + if (offset & 1) { + uint32_t tmp = hi; + + offset >>= 1; + hi = ROL32(lo, offset); + lo = ROL32(tmp, offset + 1); + } else { + offset >>= 1; + lo = ROL32(lo, offset); + hi = ROL32(hi, offset); + } + + return ((uint64_t)hi << 32) | lo; + } +} + +static const unsigned char rhotates[5][5] = { + { 0, 1, 62, 28, 27 }, + { 36, 44, 6, 55, 20 }, + { 3, 10, 43, 25, 39 }, + { 41, 45, 15, 21, 8 }, + { 18, 2, 61, 56, 14 } +}; + +static const uint64_t iotas[] = { + sizeof(void *) == 8 ? 0x0000000000000001U : 0x0000000000000001U, + sizeof(void *) == 8 ? 0x0000000000008082U : 0x0000008900000000U, + sizeof(void *) == 8 ? 0x800000000000808aU : 0x8000008b00000000U, + sizeof(void *) == 8 ? 0x8000000080008000U : 0x8000808000000000U, + sizeof(void *) == 8 ? 0x000000000000808bU : 0x0000008b00000001U, + sizeof(void *) == 8 ? 0x0000000080000001U : 0x0000800000000001U, + sizeof(void *) == 8 ? 0x8000000080008081U : 0x8000808800000001U, + sizeof(void *) == 8 ? 0x8000000000008009U : 0x8000008200000001U, + sizeof(void *) == 8 ? 0x000000000000008aU : 0x0000000b00000000U, + sizeof(void *) == 8 ? 0x0000000000000088U : 0x0000000a00000000U, + sizeof(void *) == 8 ? 0x0000000080008009U : 0x0000808200000001U, + sizeof(void *) == 8 ? 0x000000008000000aU : 0x0000800300000000U, + sizeof(void *) == 8 ? 0x000000008000808bU : 0x0000808b00000001U, + sizeof(void *) == 8 ? 0x800000000000008bU : 0x8000000b00000001U, + sizeof(void *) == 8 ? 0x8000000000008089U : 0x8000008a00000001U, + sizeof(void *) == 8 ? 0x8000000000008003U : 0x8000008100000001U, + sizeof(void *) == 8 ? 0x8000000000008002U : 0x8000008100000000U, + sizeof(void *) == 8 ? 0x8000000000000080U : 0x8000000800000000U, + sizeof(void *) == 8 ? 0x000000000000800aU : 0x0000008300000000U, + sizeof(void *) == 8 ? 0x800000008000000aU : 0x8000800300000000U, + sizeof(void *) == 8 ? 0x8000000080008081U : 0x8000808800000001U, + sizeof(void *) == 8 ? 0x8000000000008080U : 0x8000008800000000U, + sizeof(void *) == 8 ? 0x0000000080000001U : 0x0000800000000001U, + sizeof(void *) == 8 ? 0x8000000080008008U : 0x8000808200000000U +}; #if defined(KECCAK_REF) /* @@ -60,13 +119,6 @@ static void Theta(uint64_t A[5][5]) static void Rho(uint64_t A[5][5]) { - static const unsigned char rhotates[5][5] = { - { 0, 1, 62, 28, 27 }, - { 36, 44, 6, 55, 20 }, - { 3, 10, 43, 25, 39 }, - { 41, 45, 15, 21, 8 }, - { 18, 2, 61, 56, 14 } - }; size_t y; for (y = 0; y < 5; y++) { @@ -141,17 +193,6 @@ static void Chi(uint64_t A[5][5]) static void Iota(uint64_t A[5][5], size_t i) { - static const uint64_t iotas[] = { - 0x0000000000000001U, 0x0000000000008082U, 0x800000000000808aU, - 0x8000000080008000U, 0x000000000000808bU, 0x0000000080000001U, - 0x8000000080008081U, 0x8000000000008009U, 0x000000000000008aU, - 0x0000000000000088U, 0x0000000080008009U, 0x000000008000000aU, - 0x000000008000808bU, 0x800000000000008bU, 0x8000000000008089U, - 0x8000000000008003U, 0x8000000000008002U, 0x8000000000000080U, - 0x000000000000800aU, 0x800000008000000aU, 0x8000000080008081U, - 0x8000000000008080U, 0x0000000080000001U, 0x8000000080008008U - }; - assert(i < (sizeof(iotas) / sizeof(iotas[0]))); A[0][0] ^= iotas[i]; } @@ -183,23 +224,6 @@ void KeccakF1600(uint64_t A[5][5]) static void Round(uint64_t A[5][5], size_t i) { uint64_t C[5], D[5], T[2][5]; - static const unsigned char rhotates[5][5] = { - { 0, 1, 62, 28, 27 }, - { 36, 44, 6, 55, 20 }, - { 3, 10, 43, 25, 39 }, - { 41, 45, 15, 21, 8 }, - { 18, 2, 61, 56, 14 } - }; - static const uint64_t iotas[] = { - 0x0000000000000001U, 0x0000000000008082U, 0x800000000000808aU, - 0x8000000080008000U, 0x000000000000808bU, 0x0000000080000001U, - 0x8000000080008081U, 0x8000000000008009U, 0x000000000000008aU, - 0x0000000000000088U, 0x0000000080008009U, 0x000000008000000aU, - 0x000000008000808bU, 0x800000000000008bU, 0x8000000000008089U, - 0x8000000000008003U, 0x8000000000008002U, 0x8000000000000080U, - 0x000000000000800aU, 0x800000008000000aU, 0x8000000080008081U, - 0x8000000000008080U, 0x0000000080000001U, 0x8000000080008008U - }; assert(i < (sizeof(iotas) / sizeof(iotas[0]))); @@ -310,23 +334,6 @@ void KeccakF1600(uint64_t A[5][5]) static void Round(uint64_t R[5][5], uint64_t A[5][5], size_t i) { uint64_t C[5], D[5]; - static const unsigned char rhotates[5][5] = { - { 0, 1, 62, 28, 27 }, - { 36, 44, 6, 55, 20 }, - { 3, 10, 43, 25, 39 }, - { 41, 45, 15, 21, 8 }, - { 18, 2, 61, 56, 14 } - }; - static const uint64_t iotas[] = { - 0x0000000000000001U, 0x0000000000008082U, 0x800000000000808aU, - 0x8000000080008000U, 0x000000000000808bU, 0x0000000080000001U, - 0x8000000080008081U, 0x8000000000008009U, 0x000000000000008aU, - 0x0000000000000088U, 0x0000000080008009U, 0x000000008000000aU, - 0x000000008000808bU, 0x800000000000008bU, 0x8000000000008089U, - 0x8000000000008003U, 0x8000000000008002U, 0x8000000000000080U, - 0x000000000000800aU, 0x800000008000000aU, 0x8000000080008081U, - 0x8000000000008080U, 0x0000000080000001U, 0x8000000080008008U - }; assert(i < (sizeof(iotas) / sizeof(iotas[0]))); @@ -425,23 +432,6 @@ void KeccakF1600(uint64_t A[5][5]) static void FourRounds(uint64_t A[5][5], size_t i) { uint64_t B[5], C[5], D[5]; - static const unsigned char rhotates[5][5] = { - { 0, 1, 62, 28, 27 }, - { 36, 44, 6, 55, 20 }, - { 3, 10, 43, 25, 39 }, - { 41, 45, 15, 21, 8 }, - { 18, 2, 61, 56, 14 } - }; - static const uint64_t iotas[] = { - 0x0000000000000001U, 0x0000000000008082U, 0x800000000000808aU, - 0x8000000080008000U, 0x000000000000808bU, 0x0000000080000001U, - 0x8000000080008081U, 0x8000000000008009U, 0x000000000000008aU, - 0x0000000000000088U, 0x0000000080008009U, 0x000000008000000aU, - 0x000000008000808bU, 0x800000000000008bU, 0x8000000000008089U, - 0x8000000000008003U, 0x8000000000008002U, 0x8000000000000080U, - 0x000000000000800aU, 0x800000008000000aU, 0x8000000080008081U, - 0x8000000000008080U, 0x0000000080000001U, 0x8000000080008008U - }; assert(i <= (sizeof(iotas) / sizeof(iotas[0]) - 4)); @@ -731,6 +721,39 @@ void KeccakF1600(uint64_t A[5][5]) #endif +static uint64_t BitInterleave(uint64_t Ai) +{ + if (sizeof(void *) < 8) { + uint32_t hi = 0, lo = 0; + int j; + + for (j = 0; j < 32; j++) { + lo |= ((uint32_t)(Ai >> (2 * j)) & 1) << j; + hi |= ((uint32_t)(Ai >> (2 * j + 1)) & 1) << j; + } + + Ai = ((uint64_t)hi << 32) | lo; + } + + return Ai; +} + +static uint64_t BitDeinterleave(uint64_t Ai) +{ + if (sizeof(void *) < 8) { + uint32_t hi = (uint32_t)(Ai >> 32), lo = (uint32_t)Ai; + int j; + + Ai = 0; + for (j = 0; j < 32; j++) { + Ai |= (uint64_t)((lo >> j) & 1) << (2 * j); + Ai |= (uint64_t)((hi >> j) & 1) << (2 * j + 1); + } + } + + return Ai; +} + /* * SHA3_absorb can be called multiple times, but at each invocation * largest multiple of |r| out of |len| bytes are processed. Then @@ -751,11 +774,13 @@ size_t SHA3_absorb(uint64_t A[5][5], const unsigned char *inp, size_t len, while (len >= r) { for (i = 0; i < w; i++) { - A_flat[i] ^= (uint64_t)inp[0] | (uint64_t)inp[1] << 8 | - (uint64_t)inp[2] << 16 | (uint64_t)inp[3] << 24 | - (uint64_t)inp[4] << 32 | (uint64_t)inp[5] << 40 | - (uint64_t)inp[6] << 48 | (uint64_t)inp[7] << 56; + uint64_t Ai = (uint64_t)inp[0] | (uint64_t)inp[1] << 8 | + (uint64_t)inp[2] << 16 | (uint64_t)inp[3] << 24 | + (uint64_t)inp[4] << 32 | (uint64_t)inp[5] << 40 | + (uint64_t)inp[6] << 48 | (uint64_t)inp[7] << 56; inp += 8; + + A_flat[i] ^= BitInterleave(Ai); } KeccakF1600(A); len -= r; @@ -777,7 +802,7 @@ void SHA3_squeeze(uint64_t A[5][5], unsigned char *out, size_t len, size_t r) while (len >= r) { for (i = 0; i < w; i++) { - uint64_t Ai = A_flat[i]; + uint64_t Ai = BitDeinterleave(A_flat[i]); out[0] = (unsigned char)(Ai); out[1] = (unsigned char)(Ai >> 8); @@ -798,7 +823,7 @@ void SHA3_squeeze(uint64_t A[5][5], unsigned char *out, size_t len, size_t r) len /= 8; for (i = 0; i < len; i++) { - uint64_t Ai = A_flat[i]; + uint64_t Ai = BitDeinterleave(A_flat[i]); out[0] = (unsigned char)(Ai); out[1] = (unsigned char)(Ai >> 8); @@ -812,7 +837,7 @@ void SHA3_squeeze(uint64_t A[5][5], unsigned char *out, size_t len, size_t r) } if (rem) { - uint64_t Ai = A_flat[i]; + uint64_t Ai = BitDeinterleave(A_flat[i]); for (i = 0; i < rem; i++) { *out++ = (unsigned char)Ai; |