Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | 24x 24x 24x 1x 1x 1x 256x 256x 2048x 256x 2390x 1x 2390x 10x 2390x 4x 2x 2x 2x 2x 24x 1195x 1195x 1195x 1195x 24x 1185x 1185x 1185x 1185x 24x 1x 1x 1x 1x 1161x 1x 1x 1x 24x | var bigInt = require('big-integer');
var Stream = require('stream');
// Backwards compatibility for node versions < 8
Iif (!Stream.Writable || !Stream.Writable.prototype.destroy)
Stream = require('readable-stream');
var table;
function generateTable() {
var poly = 0xEDB88320,c,n,k;
table = [];
for (n = 0; n < 256; n++) {
c = n;
for (k = 0; k < 8; k++)
c = (c & 1) ? poly ^ (c >>> 1) : c = c >>> 1;
table[n] = c >>> 0;
}
}
function crc(ch,crc) {
if (!table)
generateTable();
if (ch.charCodeAt)
ch = ch.charCodeAt(0);
return (bigInt(crc).shiftRight(8).and(0xffffff)).xor(table[bigInt(crc).xor(ch).and(0xff)]).value;
}
function Decrypt() {
if (!(this instanceof Decrypt))
return new Decrypt();
this.key0 = 305419896;
this.key1 = 591751049;
this.key2 = 878082192;
}
Decrypt.prototype.update = function(h) {
this.key0 = crc(h,this.key0);
this.key1 = bigInt(this.key0).and(255).and(4294967295).add(this.key1)
this.key1 = bigInt(this.key1).multiply(134775813).add(1).and(4294967295).value;
this.key2 = crc(bigInt(this.key1).shiftRight(24).and(255), this.key2);
}
Decrypt.prototype.decryptByte = function(c) {
var k = bigInt(this.key2).or(2);
c = c ^ bigInt(k).multiply(bigInt(k^1)).shiftRight(8).and(255);
this.update(c);
return c;
};
Decrypt.prototype.stream = function() {
var stream = Stream.Transform(),
self = this;
stream._transform = function(d,e,cb) {
for (var i = 0; i<d.length;i++) {
d[i] = self.decryptByte(d[i]);
}
this.push(d);
cb();
};
return stream;
};
module.exports = Decrypt; |