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Diffstat (limited to 'Godeps/_workspace/src/github.com/ethereum/ethash/js/makekeccak.js')
-rw-r--r-- | Godeps/_workspace/src/github.com/ethereum/ethash/js/makekeccak.js | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/js/makekeccak.js b/Godeps/_workspace/src/github.com/ethereum/ethash/js/makekeccak.js new file mode 100644 index 000000000..c4db2b80a --- /dev/null +++ b/Godeps/_workspace/src/github.com/ethereum/ethash/js/makekeccak.js @@ -0,0 +1,201 @@ +#!/usr/bin/env node +// makekeccak.js +// Tim Hughes <tim@twistedfury.com> + +/*jslint node: true, shadow:true */ +"use strict"; + +var Keccak_f1600_Rho = [ + 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14, + 27, 41, 56, 8, 25, 43, 62, 18, 39, 61, 20, 44 +]; + +var Keccak_f1600_Pi= [ + 10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4, + 15, 23, 19, 13, 12, 2, 20, 14, 22, 9, 6, 1 +]; + +var Keccak_f1600_RC = [ + 0x00000001, 0x00000000, + 0x00008082, 0x00000000, + 0x0000808a, 0x80000000, + 0x80008000, 0x80000000, + 0x0000808b, 0x00000000, + 0x80000001, 0x00000000, + 0x80008081, 0x80000000, + 0x00008009, 0x80000000, + 0x0000008a, 0x00000000, + 0x00000088, 0x00000000, + 0x80008009, 0x00000000, + 0x8000000a, 0x00000000, + 0x8000808b, 0x00000000, + 0x0000008b, 0x80000000, + 0x00008089, 0x80000000, + 0x00008003, 0x80000000, + 0x00008002, 0x80000000, + 0x00000080, 0x80000000, + 0x0000800a, 0x00000000, + 0x8000000a, 0x80000000, + 0x80008081, 0x80000000, + 0x00008080, 0x80000000, + 0x80000001, 0x00000000, + 0x80008008, 0x80000000, +]; + +function makeRotLow(lo, hi, n) +{ + if (n === 0 || n === 32) throw Error("unsupported"); + if ((n & 0x20) !== 0) + { + n &= ~0x20; + var t = hi; + hi = lo; + lo = t; + } + var hir = hi + " >>> " + (32 - n); + var los = lo + " << " + n; + return los + " | " + hir; +} + +function makeRotHigh(lo, hi, n) +{ + if (n === 0 || n === 32) throw Error("unsupported"); + if ((n & 0x20) !== 0) + { + n &= ~0x20; + var t = hi; + hi = lo; + lo = t; + } + var his = hi + " << " + n; + var lor = lo + " >>> " + (32 - n); + return his + " | " + lor; +} + +function makeKeccak_f1600() +{ + var format = function(n) + { + return n < 10 ? "0"+n : ""+n; + }; + + var a = function(n, w) + { + return "a" + format(n) + (w !== 0?'h':'l'); + }; + + var b = function(n, w) + { + return "b" + format(n) + (w !== 0?'h':'l'); + }; + + var str = ""; + str += "function keccak_f1600(outState, outOffset, outSize, inState)\n"; + str += "{\n"; + + for (var i = 0; i < 25; ++i) + { + for (var w = 0; w <= 1; ++w) + { + str += "\tvar " + a(i,w) + " = inState["+(i<<1|w)+"]|0;\n"; + } + } + + for (var j = 0; j < 5; ++j) + { + str += "\tvar "; + for (var i = 0; i < 5; ++i) + { + if (i !== 0) + str += ", "; + str += b(j*5+i,0) + ", " + b(j*5+i,1); + } + str += ";\n"; + } + + str += "\tvar tl, th;\n"; + str += "\n"; + str += "\tfor (var r = 0; r < 48; r = (r+2)|0)\n"; + str += "\t{\n"; + + + // Theta + str += "\t\t// Theta\n"; + for (var i = 0; i < 5; ++i) + { + for (var w = 0; w <= 1; ++w) + { + str += "\t\t" + b(i,w) + " = " + a(i,w) + " ^ " + a(i+5,w) + " ^ " + a(i+10,w) + " ^ " + a(i+15,w) + " ^ " + a(i+20,w) + ";\n"; + } + } + + for (var i = 0; i < 5; ++i) + { + var i4 = (i + 4) % 5; + var i1 = (i + 1) % 5; + str += "\t\ttl = " + b(i4,0) + " ^ (" + b(i1,0) + " << 1 | " + b(i1,1) + " >>> 31);\n"; + str += "\t\tth = " + b(i4,1) + " ^ (" + b(i1,1) + " << 1 | " + b(i1,0) + " >>> 31);\n"; + + for (var j = 0; j < 25; j = (j+5)|0) + { + str += "\t\t" + a((j+i),0) + " ^= tl;\n"; + str += "\t\t" + a((j+i),1) + " ^= th;\n"; + } + } + + + // Rho Pi + str += "\n\t\t// Rho Pi\n"; + for (var w = 0; w <= 1; ++w) + { + str += "\t\t" + b(0,w) + " = " + a(0,w) + ";\n"; + } + var opi = 1; + for (var i = 0; i < 24; ++i) + { + var pi = Keccak_f1600_Pi[i]; + str += "\t\t" + b(pi,0) + " = " + makeRotLow(a(opi,0), a(opi,1), Keccak_f1600_Rho[i]) + ";\n"; + str += "\t\t" + b(pi,1) + " = " + makeRotHigh(a(opi,0), a(opi,1), Keccak_f1600_Rho[i]) + ";\n"; + opi = pi; + } + + // Chi + str += "\n\t\t// Chi\n"; + for (var j = 0; j < 25; j += 5) + { + for (var i = 0; i < 5; ++i) + { + for (var w = 0; w <= 1; ++w) + { + str += "\t\t" + a(j+i,w) + " = " + b(j+i,w) + " ^ ~" + b(j+(i+1)%5,w) + " & " + b(j+(i+2)%5,w) + ";\n"; + } + } + } + + // Iota + str += "\n\t\t// Iota\n"; + for (var w = 0; w <= 1; ++w) + { + str += "\t\t" + a(0,w) + " ^= Keccak_f1600_RC[r|" + w + "];\n"; + } + + + str += "\t}\n"; + + for (var i = 0; i < 25; ++i) + { + if (i == 4 || i == 8) + { + str += "\tif (outSize == " + i*2 + ")\n\t\treturn;\n"; + } + for (var w = 0; w <= 1; ++w) + { + str += "\toutState[outOffset|"+(i<<1|w)+"] = " + a(i,w) + ";\n"; + } + } + str += "}\n"; + + return str; +} + +console.log(makeKeccak_f1600()); |