--- /dev/null
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !amd64 appengine gccgo
+
+package sha3
+
+// rc stores the round constants for use in the ι step.
+var rc = [24]uint64{
+ 0x0000000000000001,
+ 0x0000000000008082,
+ 0x800000000000808A,
+ 0x8000000080008000,
+ 0x000000000000808B,
+ 0x0000000080000001,
+ 0x8000000080008081,
+ 0x8000000000008009,
+ 0x000000000000008A,
+ 0x0000000000000088,
+ 0x0000000080008009,
+ 0x000000008000000A,
+ 0x000000008000808B,
+ 0x800000000000008B,
+ 0x8000000000008089,
+ 0x8000000000008003,
+ 0x8000000000008002,
+ 0x8000000000000080,
+ 0x000000000000800A,
+ 0x800000008000000A,
+ 0x8000000080008081,
+ 0x8000000000008080,
+ 0x0000000080000001,
+ 0x8000000080008008,
+}
+
+// keccakF1600 applies the Keccak permutation to a 1600b-wide
+// state represented as a slice of 25 uint64s.
+func keccakF1600(a *[25]uint64) {
+ // Implementation translated from Keccak-inplace.c
+ // in the keccak reference code.
+ var t, bc0, bc1, bc2, bc3, bc4, d0, d1, d2, d3, d4 uint64
+
+ for i := 0; i < 24; i += 4 {
+ // Combines the 5 steps in each round into 2 steps.
+ // Unrolls 4 rounds per loop and spreads some steps across rounds.
+
+ // Round 1
+ bc0 = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20]
+ bc1 = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21]
+ bc2 = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22]
+ bc3 = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23]
+ bc4 = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24]
+ d0 = bc4 ^ (bc1<<1 | bc1>>63)
+ d1 = bc0 ^ (bc2<<1 | bc2>>63)
+ d2 = bc1 ^ (bc3<<1 | bc3>>63)
+ d3 = bc2 ^ (bc4<<1 | bc4>>63)
+ d4 = bc3 ^ (bc0<<1 | bc0>>63)
+
+ bc0 = a[0] ^ d0
+ t = a[6] ^ d1
+ bc1 = t<<44 | t>>(64-44)
+ t = a[12] ^ d2
+ bc2 = t<<43 | t>>(64-43)
+ t = a[18] ^ d3
+ bc3 = t<<21 | t>>(64-21)
+ t = a[24] ^ d4
+ bc4 = t<<14 | t>>(64-14)
+ a[0] = bc0 ^ (bc2 &^ bc1) ^ rc[i]
+ a[6] = bc1 ^ (bc3 &^ bc2)
+ a[12] = bc2 ^ (bc4 &^ bc3)
+ a[18] = bc3 ^ (bc0 &^ bc4)
+ a[24] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[10] ^ d0
+ bc2 = t<<3 | t>>(64-3)
+ t = a[16] ^ d1
+ bc3 = t<<45 | t>>(64-45)
+ t = a[22] ^ d2
+ bc4 = t<<61 | t>>(64-61)
+ t = a[3] ^ d3
+ bc0 = t<<28 | t>>(64-28)
+ t = a[9] ^ d4
+ bc1 = t<<20 | t>>(64-20)
+ a[10] = bc0 ^ (bc2 &^ bc1)
+ a[16] = bc1 ^ (bc3 &^ bc2)
+ a[22] = bc2 ^ (bc4 &^ bc3)
+ a[3] = bc3 ^ (bc0 &^ bc4)
+ a[9] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[20] ^ d0
+ bc4 = t<<18 | t>>(64-18)
+ t = a[1] ^ d1
+ bc0 = t<<1 | t>>(64-1)
+ t = a[7] ^ d2
+ bc1 = t<<6 | t>>(64-6)
+ t = a[13] ^ d3
+ bc2 = t<<25 | t>>(64-25)
+ t = a[19] ^ d4
+ bc3 = t<<8 | t>>(64-8)
+ a[20] = bc0 ^ (bc2 &^ bc1)
+ a[1] = bc1 ^ (bc3 &^ bc2)
+ a[7] = bc2 ^ (bc4 &^ bc3)
+ a[13] = bc3 ^ (bc0 &^ bc4)
+ a[19] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[5] ^ d0
+ bc1 = t<<36 | t>>(64-36)
+ t = a[11] ^ d1
+ bc2 = t<<10 | t>>(64-10)
+ t = a[17] ^ d2
+ bc3 = t<<15 | t>>(64-15)
+ t = a[23] ^ d3
+ bc4 = t<<56 | t>>(64-56)
+ t = a[4] ^ d4
+ bc0 = t<<27 | t>>(64-27)
+ a[5] = bc0 ^ (bc2 &^ bc1)
+ a[11] = bc1 ^ (bc3 &^ bc2)
+ a[17] = bc2 ^ (bc4 &^ bc3)
+ a[23] = bc3 ^ (bc0 &^ bc4)
+ a[4] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[15] ^ d0
+ bc3 = t<<41 | t>>(64-41)
+ t = a[21] ^ d1
+ bc4 = t<<2 | t>>(64-2)
+ t = a[2] ^ d2
+ bc0 = t<<62 | t>>(64-62)
+ t = a[8] ^ d3
+ bc1 = t<<55 | t>>(64-55)
+ t = a[14] ^ d4
+ bc2 = t<<39 | t>>(64-39)
+ a[15] = bc0 ^ (bc2 &^ bc1)
+ a[21] = bc1 ^ (bc3 &^ bc2)
+ a[2] = bc2 ^ (bc4 &^ bc3)
+ a[8] = bc3 ^ (bc0 &^ bc4)
+ a[14] = bc4 ^ (bc1 &^ bc0)
+
+ // Round 2
+ bc0 = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20]
+ bc1 = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21]
+ bc2 = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22]
+ bc3 = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23]
+ bc4 = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24]
+ d0 = bc4 ^ (bc1<<1 | bc1>>63)
+ d1 = bc0 ^ (bc2<<1 | bc2>>63)
+ d2 = bc1 ^ (bc3<<1 | bc3>>63)
+ d3 = bc2 ^ (bc4<<1 | bc4>>63)
+ d4 = bc3 ^ (bc0<<1 | bc0>>63)
+
+ bc0 = a[0] ^ d0
+ t = a[16] ^ d1
+ bc1 = t<<44 | t>>(64-44)
+ t = a[7] ^ d2
+ bc2 = t<<43 | t>>(64-43)
+ t = a[23] ^ d3
+ bc3 = t<<21 | t>>(64-21)
+ t = a[14] ^ d4
+ bc4 = t<<14 | t>>(64-14)
+ a[0] = bc0 ^ (bc2 &^ bc1) ^ rc[i+1]
+ a[16] = bc1 ^ (bc3 &^ bc2)
+ a[7] = bc2 ^ (bc4 &^ bc3)
+ a[23] = bc3 ^ (bc0 &^ bc4)
+ a[14] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[20] ^ d0
+ bc2 = t<<3 | t>>(64-3)
+ t = a[11] ^ d1
+ bc3 = t<<45 | t>>(64-45)
+ t = a[2] ^ d2
+ bc4 = t<<61 | t>>(64-61)
+ t = a[18] ^ d3
+ bc0 = t<<28 | t>>(64-28)
+ t = a[9] ^ d4
+ bc1 = t<<20 | t>>(64-20)
+ a[20] = bc0 ^ (bc2 &^ bc1)
+ a[11] = bc1 ^ (bc3 &^ bc2)
+ a[2] = bc2 ^ (bc4 &^ bc3)
+ a[18] = bc3 ^ (bc0 &^ bc4)
+ a[9] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[15] ^ d0
+ bc4 = t<<18 | t>>(64-18)
+ t = a[6] ^ d1
+ bc0 = t<<1 | t>>(64-1)
+ t = a[22] ^ d2
+ bc1 = t<<6 | t>>(64-6)
+ t = a[13] ^ d3
+ bc2 = t<<25 | t>>(64-25)
+ t = a[4] ^ d4
+ bc3 = t<<8 | t>>(64-8)
+ a[15] = bc0 ^ (bc2 &^ bc1)
+ a[6] = bc1 ^ (bc3 &^ bc2)
+ a[22] = bc2 ^ (bc4 &^ bc3)
+ a[13] = bc3 ^ (bc0 &^ bc4)
+ a[4] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[10] ^ d0
+ bc1 = t<<36 | t>>(64-36)
+ t = a[1] ^ d1
+ bc2 = t<<10 | t>>(64-10)
+ t = a[17] ^ d2
+ bc3 = t<<15 | t>>(64-15)
+ t = a[8] ^ d3
+ bc4 = t<<56 | t>>(64-56)
+ t = a[24] ^ d4
+ bc0 = t<<27 | t>>(64-27)
+ a[10] = bc0 ^ (bc2 &^ bc1)
+ a[1] = bc1 ^ (bc3 &^ bc2)
+ a[17] = bc2 ^ (bc4 &^ bc3)
+ a[8] = bc3 ^ (bc0 &^ bc4)
+ a[24] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[5] ^ d0
+ bc3 = t<<41 | t>>(64-41)
+ t = a[21] ^ d1
+ bc4 = t<<2 | t>>(64-2)
+ t = a[12] ^ d2
+ bc0 = t<<62 | t>>(64-62)
+ t = a[3] ^ d3
+ bc1 = t<<55 | t>>(64-55)
+ t = a[19] ^ d4
+ bc2 = t<<39 | t>>(64-39)
+ a[5] = bc0 ^ (bc2 &^ bc1)
+ a[21] = bc1 ^ (bc3 &^ bc2)
+ a[12] = bc2 ^ (bc4 &^ bc3)
+ a[3] = bc3 ^ (bc0 &^ bc4)
+ a[19] = bc4 ^ (bc1 &^ bc0)
+
+ // Round 3
+ bc0 = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20]
+ bc1 = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21]
+ bc2 = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22]
+ bc3 = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23]
+ bc4 = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24]
+ d0 = bc4 ^ (bc1<<1 | bc1>>63)
+ d1 = bc0 ^ (bc2<<1 | bc2>>63)
+ d2 = bc1 ^ (bc3<<1 | bc3>>63)
+ d3 = bc2 ^ (bc4<<1 | bc4>>63)
+ d4 = bc3 ^ (bc0<<1 | bc0>>63)
+
+ bc0 = a[0] ^ d0
+ t = a[11] ^ d1
+ bc1 = t<<44 | t>>(64-44)
+ t = a[22] ^ d2
+ bc2 = t<<43 | t>>(64-43)
+ t = a[8] ^ d3
+ bc3 = t<<21 | t>>(64-21)
+ t = a[19] ^ d4
+ bc4 = t<<14 | t>>(64-14)
+ a[0] = bc0 ^ (bc2 &^ bc1) ^ rc[i+2]
+ a[11] = bc1 ^ (bc3 &^ bc2)
+ a[22] = bc2 ^ (bc4 &^ bc3)
+ a[8] = bc3 ^ (bc0 &^ bc4)
+ a[19] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[15] ^ d0
+ bc2 = t<<3 | t>>(64-3)
+ t = a[1] ^ d1
+ bc3 = t<<45 | t>>(64-45)
+ t = a[12] ^ d2
+ bc4 = t<<61 | t>>(64-61)
+ t = a[23] ^ d3
+ bc0 = t<<28 | t>>(64-28)
+ t = a[9] ^ d4
+ bc1 = t<<20 | t>>(64-20)
+ a[15] = bc0 ^ (bc2 &^ bc1)
+ a[1] = bc1 ^ (bc3 &^ bc2)
+ a[12] = bc2 ^ (bc4 &^ bc3)
+ a[23] = bc3 ^ (bc0 &^ bc4)
+ a[9] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[5] ^ d0
+ bc4 = t<<18 | t>>(64-18)
+ t = a[16] ^ d1
+ bc0 = t<<1 | t>>(64-1)
+ t = a[2] ^ d2
+ bc1 = t<<6 | t>>(64-6)
+ t = a[13] ^ d3
+ bc2 = t<<25 | t>>(64-25)
+ t = a[24] ^ d4
+ bc3 = t<<8 | t>>(64-8)
+ a[5] = bc0 ^ (bc2 &^ bc1)
+ a[16] = bc1 ^ (bc3 &^ bc2)
+ a[2] = bc2 ^ (bc4 &^ bc3)
+ a[13] = bc3 ^ (bc0 &^ bc4)
+ a[24] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[20] ^ d0
+ bc1 = t<<36 | t>>(64-36)
+ t = a[6] ^ d1
+ bc2 = t<<10 | t>>(64-10)
+ t = a[17] ^ d2
+ bc3 = t<<15 | t>>(64-15)
+ t = a[3] ^ d3
+ bc4 = t<<56 | t>>(64-56)
+ t = a[14] ^ d4
+ bc0 = t<<27 | t>>(64-27)
+ a[20] = bc0 ^ (bc2 &^ bc1)
+ a[6] = bc1 ^ (bc3 &^ bc2)
+ a[17] = bc2 ^ (bc4 &^ bc3)
+ a[3] = bc3 ^ (bc0 &^ bc4)
+ a[14] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[10] ^ d0
+ bc3 = t<<41 | t>>(64-41)
+ t = a[21] ^ d1
+ bc4 = t<<2 | t>>(64-2)
+ t = a[7] ^ d2
+ bc0 = t<<62 | t>>(64-62)
+ t = a[18] ^ d3
+ bc1 = t<<55 | t>>(64-55)
+ t = a[4] ^ d4
+ bc2 = t<<39 | t>>(64-39)
+ a[10] = bc0 ^ (bc2 &^ bc1)
+ a[21] = bc1 ^ (bc3 &^ bc2)
+ a[7] = bc2 ^ (bc4 &^ bc3)
+ a[18] = bc3 ^ (bc0 &^ bc4)
+ a[4] = bc4 ^ (bc1 &^ bc0)
+
+ // Round 4
+ bc0 = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20]
+ bc1 = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21]
+ bc2 = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22]
+ bc3 = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23]
+ bc4 = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24]
+ d0 = bc4 ^ (bc1<<1 | bc1>>63)
+ d1 = bc0 ^ (bc2<<1 | bc2>>63)
+ d2 = bc1 ^ (bc3<<1 | bc3>>63)
+ d3 = bc2 ^ (bc4<<1 | bc4>>63)
+ d4 = bc3 ^ (bc0<<1 | bc0>>63)
+
+ bc0 = a[0] ^ d0
+ t = a[1] ^ d1
+ bc1 = t<<44 | t>>(64-44)
+ t = a[2] ^ d2
+ bc2 = t<<43 | t>>(64-43)
+ t = a[3] ^ d3
+ bc3 = t<<21 | t>>(64-21)
+ t = a[4] ^ d4
+ bc4 = t<<14 | t>>(64-14)
+ a[0] = bc0 ^ (bc2 &^ bc1) ^ rc[i+3]
+ a[1] = bc1 ^ (bc3 &^ bc2)
+ a[2] = bc2 ^ (bc4 &^ bc3)
+ a[3] = bc3 ^ (bc0 &^ bc4)
+ a[4] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[5] ^ d0
+ bc2 = t<<3 | t>>(64-3)
+ t = a[6] ^ d1
+ bc3 = t<<45 | t>>(64-45)
+ t = a[7] ^ d2
+ bc4 = t<<61 | t>>(64-61)
+ t = a[8] ^ d3
+ bc0 = t<<28 | t>>(64-28)
+ t = a[9] ^ d4
+ bc1 = t<<20 | t>>(64-20)
+ a[5] = bc0 ^ (bc2 &^ bc1)
+ a[6] = bc1 ^ (bc3 &^ bc2)
+ a[7] = bc2 ^ (bc4 &^ bc3)
+ a[8] = bc3 ^ (bc0 &^ bc4)
+ a[9] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[10] ^ d0
+ bc4 = t<<18 | t>>(64-18)
+ t = a[11] ^ d1
+ bc0 = t<<1 | t>>(64-1)
+ t = a[12] ^ d2
+ bc1 = t<<6 | t>>(64-6)
+ t = a[13] ^ d3
+ bc2 = t<<25 | t>>(64-25)
+ t = a[14] ^ d4
+ bc3 = t<<8 | t>>(64-8)
+ a[10] = bc0 ^ (bc2 &^ bc1)
+ a[11] = bc1 ^ (bc3 &^ bc2)
+ a[12] = bc2 ^ (bc4 &^ bc3)
+ a[13] = bc3 ^ (bc0 &^ bc4)
+ a[14] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[15] ^ d0
+ bc1 = t<<36 | t>>(64-36)
+ t = a[16] ^ d1
+ bc2 = t<<10 | t>>(64-10)
+ t = a[17] ^ d2
+ bc3 = t<<15 | t>>(64-15)
+ t = a[18] ^ d3
+ bc4 = t<<56 | t>>(64-56)
+ t = a[19] ^ d4
+ bc0 = t<<27 | t>>(64-27)
+ a[15] = bc0 ^ (bc2 &^ bc1)
+ a[16] = bc1 ^ (bc3 &^ bc2)
+ a[17] = bc2 ^ (bc4 &^ bc3)
+ a[18] = bc3 ^ (bc0 &^ bc4)
+ a[19] = bc4 ^ (bc1 &^ bc0)
+
+ t = a[20] ^ d0
+ bc3 = t<<41 | t>>(64-41)
+ t = a[21] ^ d1
+ bc4 = t<<2 | t>>(64-2)
+ t = a[22] ^ d2
+ bc0 = t<<62 | t>>(64-62)
+ t = a[23] ^ d3
+ bc1 = t<<55 | t>>(64-55)
+ t = a[24] ^ d4
+ bc2 = t<<39 | t>>(64-39)
+ a[20] = bc0 ^ (bc2 &^ bc1)
+ a[21] = bc1 ^ (bc3 &^ bc2)
+ a[22] = bc2 ^ (bc4 &^ bc3)
+ a[23] = bc3 ^ (bc0 &^ bc4)
+ a[24] = bc4 ^ (bc1 &^ bc0)
+ }
+}
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