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146 lines
3.5 KiB
146 lines
3.5 KiB
'use strict';
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var utils = require('./utils');
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var common = require('./common');
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var rotl32 = utils.rotl32;
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var sum32 = utils.sum32;
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var sum32_3 = utils.sum32_3;
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var sum32_4 = utils.sum32_4;
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var BlockHash = common.BlockHash;
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function RIPEMD160() {
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if (!(this instanceof RIPEMD160))
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return new RIPEMD160();
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BlockHash.call(this);
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this.h = [ 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0 ];
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this.endian = 'little';
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}
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utils.inherits(RIPEMD160, BlockHash);
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exports.ripemd160 = RIPEMD160;
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RIPEMD160.blockSize = 512;
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RIPEMD160.outSize = 160;
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RIPEMD160.hmacStrength = 192;
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RIPEMD160.padLength = 64;
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RIPEMD160.prototype._update = function update(msg, start) {
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var A = this.h[0];
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var B = this.h[1];
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var C = this.h[2];
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var D = this.h[3];
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var E = this.h[4];
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var Ah = A;
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var Bh = B;
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var Ch = C;
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var Dh = D;
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var Eh = E;
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for (var j = 0; j < 80; j++) {
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var T = sum32(
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rotl32(
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sum32_4(A, f(j, B, C, D), msg[r[j] + start], K(j)),
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s[j]),
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E);
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A = E;
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E = D;
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D = rotl32(C, 10);
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C = B;
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B = T;
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T = sum32(
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rotl32(
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sum32_4(Ah, f(79 - j, Bh, Ch, Dh), msg[rh[j] + start], Kh(j)),
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sh[j]),
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Eh);
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Ah = Eh;
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Eh = Dh;
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Dh = rotl32(Ch, 10);
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Ch = Bh;
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Bh = T;
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}
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T = sum32_3(this.h[1], C, Dh);
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this.h[1] = sum32_3(this.h[2], D, Eh);
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this.h[2] = sum32_3(this.h[3], E, Ah);
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this.h[3] = sum32_3(this.h[4], A, Bh);
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this.h[4] = sum32_3(this.h[0], B, Ch);
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this.h[0] = T;
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};
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RIPEMD160.prototype._digest = function digest(enc) {
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if (enc === 'hex')
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return utils.toHex32(this.h, 'little');
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else
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return utils.split32(this.h, 'little');
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};
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function f(j, x, y, z) {
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if (j <= 15)
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return x ^ y ^ z;
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else if (j <= 31)
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return (x & y) | ((~x) & z);
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else if (j <= 47)
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return (x | (~y)) ^ z;
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else if (j <= 63)
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return (x & z) | (y & (~z));
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else
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return x ^ (y | (~z));
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}
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function K(j) {
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if (j <= 15)
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return 0x00000000;
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else if (j <= 31)
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return 0x5a827999;
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else if (j <= 47)
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return 0x6ed9eba1;
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else if (j <= 63)
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return 0x8f1bbcdc;
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else
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return 0xa953fd4e;
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}
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function Kh(j) {
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if (j <= 15)
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return 0x50a28be6;
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else if (j <= 31)
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return 0x5c4dd124;
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else if (j <= 47)
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return 0x6d703ef3;
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else if (j <= 63)
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return 0x7a6d76e9;
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else
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return 0x00000000;
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}
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var r = [
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
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3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
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1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
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4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
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];
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var rh = [
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5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
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6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
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15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
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8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
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12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
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];
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var s = [
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11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
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7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
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11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
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11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
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9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
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];
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var sh = [
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8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
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9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
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9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
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15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
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8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
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];
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