diff options
author | Andy Polyakov <appro@openssl.org> | 2017-05-31 12:12:44 +0200 |
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committer | Andy Polyakov <appro@openssl.org> | 2017-06-05 19:34:48 +0200 |
commit | c83a4db52123603fd6d2fe8535dd19ec9e5d848d (patch) | |
tree | ecfc99de297fb9e5dd07a0405eaf113626abdfe0 /crypto/sha | |
parent | 8fc063dcc9668589fd95533d25932396d60987f9 (diff) |
sha/keccak1600.c: add ARM-specific "reference" tweaks.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Diffstat (limited to 'crypto/sha')
-rw-r--r-- | crypto/sha/keccak1600.c | 62 |
1 files changed, 41 insertions, 21 deletions
diff --git a/crypto/sha/keccak1600.c b/crypto/sha/keccak1600.c index c89188f076..f2fffe7c48 100644 --- a/crypto/sha/keccak1600.c +++ b/crypto/sha/keccak1600.c @@ -223,7 +223,8 @@ 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]; + uint64_t C[5], E[2]; /* registers */ + uint64_t D[5], T[2][5]; /* memory */ assert(i < (sizeof(iotas) / sizeof(iotas[0]))); @@ -233,41 +234,60 @@ static void Round(uint64_t A[5][5], size_t i) C[3] = A[0][3] ^ A[1][3] ^ A[2][3] ^ A[3][3] ^ A[4][3]; C[4] = A[0][4] ^ A[1][4] ^ A[2][4] ^ A[3][4] ^ A[4][4]; +#if defined(__arm__) + D[1] = E[0] = ROL64(C[2], 1) ^ C[0]; + D[4] = E[1] = ROL64(C[0], 1) ^ C[3]; + D[0] = C[0] = ROL64(C[1], 1) ^ C[4]; + D[2] = C[1] = ROL64(C[3], 1) ^ C[1]; + D[3] = C[2] = ROL64(C[4], 1) ^ C[2]; + + T[0][0] = A[3][0] ^ C[0]; /* borrow T[0][0] */ + T[0][1] = A[0][1] ^ E[0]; /* D[1] */ + T[0][2] = A[0][2] ^ C[1]; /* D[2] */ + T[0][3] = A[0][3] ^ C[2]; /* D[3] */ + T[0][4] = A[0][4] ^ E[1]; /* D[4] */ + + C[3] = ROL64(A[3][3] ^ C[2], rhotates[3][3]); /* D[3] */ + C[4] = ROL64(A[4][4] ^ E[1], rhotates[4][4]); /* D[4] */ + C[0] = A[0][0] ^ C[0]; /* rotate by 0 */ /* D[0] */ + C[2] = ROL64(A[2][2] ^ C[1], rhotates[2][2]); /* D[2] */ + C[1] = ROL64(A[1][1] ^ E[0], rhotates[1][1]); /* D[1] */ +#else D[0] = ROL64(C[1], 1) ^ C[4]; D[1] = ROL64(C[2], 1) ^ C[0]; D[2] = ROL64(C[3], 1) ^ C[1]; D[3] = ROL64(C[4], 1) ^ C[2]; D[4] = ROL64(C[0], 1) ^ C[3]; - C[0] = A[0][0] ^ D[0]; /* rotate by 0 */ - C[1] = ROL64(A[1][1] ^ D[1], rhotates[1][1]); - C[2] = ROL64(A[2][2] ^ D[2], rhotates[2][2]); - C[3] = ROL64(A[3][3] ^ D[3], rhotates[3][3]); - C[4] = ROL64(A[4][4] ^ D[4], rhotates[4][4]); - T[0][0] = A[3][0] ^ D[0]; /* borrow T[0][0] */ T[0][1] = A[0][1] ^ D[1]; T[0][2] = A[0][2] ^ D[2]; T[0][3] = A[0][3] ^ D[3]; T[0][4] = A[0][4] ^ D[4]; + C[0] = A[0][0] ^ D[0]; /* rotate by 0 */ + C[1] = ROL64(A[1][1] ^ D[1], rhotates[1][1]); + C[2] = ROL64(A[2][2] ^ D[2], rhotates[2][2]); + C[3] = ROL64(A[3][3] ^ D[3], rhotates[3][3]); + C[4] = ROL64(A[4][4] ^ D[4], rhotates[4][4]); +#endif A[0][0] = C[0] ^ (~C[1] & C[2]) ^ iotas[i]; A[0][1] = C[1] ^ (~C[2] & C[3]); A[0][2] = C[2] ^ (~C[3] & C[4]); A[0][3] = C[3] ^ (~C[4] & C[0]); A[0][4] = C[4] ^ (~C[0] & C[1]); - C[0] = ROL64(T[0][3], rhotates[0][3]); - C[1] = ROL64(A[1][4] ^ D[4], rhotates[1][4]); - C[2] = ROL64(A[2][0] ^ D[0], rhotates[2][0]); - C[3] = ROL64(A[3][1] ^ D[1], rhotates[3][1]); - C[4] = ROL64(A[4][2] ^ D[2], rhotates[4][2]); + T[1][0] = A[1][0] ^ (C[3] = D[0]); + T[1][1] = A[2][1] ^ (C[4] = D[1]); /* borrow T[1][1] */ + T[1][2] = A[1][2] ^ (E[0] = D[2]); + T[1][3] = A[1][3] ^ (E[1] = D[3]); + T[1][4] = A[2][4] ^ (C[2] = D[4]); /* borrow T[1][4] */ - T[1][0] = A[1][0] ^ D[0]; - T[1][1] = A[2][1] ^ D[1]; /* borrow T[1][1] */ - T[1][2] = A[1][2] ^ D[2]; - T[1][3] = A[1][3] ^ D[3]; - T[1][4] = A[2][4] ^ D[4]; /* borrow T[1][4] */ + C[0] = ROL64(T[0][3], rhotates[0][3]); + C[1] = ROL64(A[1][4] ^ C[2], rhotates[1][4]); /* D[4] */ + C[2] = ROL64(A[2][0] ^ C[3], rhotates[2][0]); /* D[0] */ + C[3] = ROL64(A[3][1] ^ C[4], rhotates[3][1]); /* D[1] */ + C[4] = ROL64(A[4][2] ^ E[0], rhotates[4][2]); /* D[2] */ A[1][0] = C[0] ^ (~C[1] & C[2]); A[1][1] = C[1] ^ (~C[2] & C[3]); @@ -815,10 +835,10 @@ static uint64_t BitDeinterleave(uint64_t Ai) /* * SHA3_absorb can be called multiple times, but at each invocation * largest multiple of |r| out of |len| bytes are processed. Then - * remaining amount of bytes are returned. This is done to spare caller - * trouble of calculating the largest multiple of |r|, effectively the - * blocksize. It is commonly (1600 - 256*n)/8, e.g. 168, 136, 104, 72, - * but can also be (1600 - 448)/8 = 144. All this means that message + * remaining amount of bytes is returned. This is done to spare caller + * trouble of calculating the largest multiple of |r|. |r| can be viewed + * as blocksize. It is commonly (1600 - 256*n)/8, e.g. 168, 136, 104, + * 72, but can also be (1600 - 448)/8 = 144. All this means that message * padding and intermediate sub-block buffering, byte- or bitwise, is * caller's reponsibility. */ |