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use native js function for siphash

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This commit is contained in:
ZiRo 2016-05-18 13:41:20 +02:00
parent 11204cba16
commit 6008c94949
3 changed files with 90 additions and 2 deletions
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3
contrib/static/miner-js.js
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1
contrib/static/mineworker.js
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@ -1,3 +1,4 @@
importScripts('./siphash-lib.js');
importScripts('./miner-js.js');
onmessage = function(e) {

88
contrib/static/siphash-lib.js Normal file
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var SipHash = (function() {
function u8to64(p , i) {
return { l: (p[i] | p[i+1]<<8 | p[i+2]<<16 | p[i+3]<<24) , h: (p[i+4] | p[i+5]<<8 | p[i+6]<<16 | p[i+7]<<24) };
}
function _add(a, b) {
var rl = a.l + b.l,
a2 = { h: a.h + b.h + (rl / 2 >>> 31) >>> 0,
l: rl >>> 0 };
a.h = a2.h; a.l = a2.l;
}
function _xor(a, b) {
a.h ^= b.h; a.h >>>= 0;
a.l ^= b.l; a.l >>>= 0;
}
function _rotl(a, n) {
var a2 = {
h: a.h << n | a.l >>> (32 - n),
l: a.l << n | a.h >>> (32 - n)
};
a.h = a2.h; a.l = a2.l;
}
function _rotl32(a) {
var al = a.l;
a.l = a.h; a.h = al;
}
function _compress(v0, v1, v2, v3) {
_add(v0, v1);
_add(v2, v3);
_rotl(v1, 13);
_rotl(v3, 16);
_xor(v1, v0);
_xor(v3, v2);
_rotl32(v0);
_add(v2, v1);
_add(v0, v3);
_rotl(v1, 17);
_rotl(v3, 21);
_xor(v1, v2);
_xor(v3, v0);
_rotl32(v2);
}
function hash(key, mh, ml) {
var mi = { h: mh, l: ml }
var k0 = u8to64(key, 0);
var k1 = u8to64(key, 8);
var v0 = { h: k0.h, l: k0.l }, v2 = k0;
var v1 = { h: k1.h, l: k1.l }, v3 = k1;
_xor(v0, { h: 0x736f6d65, l: 0x70736575 });
_xor(v1, { h: 0x646f7261, l: 0x6e646f6d });
_xor(v2, { h: 0x6c796765, l: 0x6e657261 });
_xor(v3, { h: 0x74656462, l: 0x79746573 });
_xor(v3, mi);
_compress(v0, v1, v2, v3);
_compress(v0, v1, v2, v3);
_xor(v0, mi);
_xor(v2, { h: 0, l: 0xff });
_compress(v0, v1, v2, v3);
_compress(v0, v1, v2, v3);
_compress(v0, v1, v2, v3);
_compress(v0, v1, v2, v3);
var h = v0;
_xor(h, v1);
_xor(h, v2);
_xor(h, v3);
var res = new Uint32Array(2);
res[0]=h.h; res[1]=h.l;
return res;
};
return {
hash: hash,
};
})();
var module = module || { }, exports = module.exports = SipHash;