Sha256: 7c7fff15251b4065ac4a29bfdec68d3b8fb1b1e000e8264336f8ea808fc89f7d
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Size: 1.33 KB
Versions: 9
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Stored size: 1.33 KB
Contents
// prng4.js - uses Arcfour as a PRNG
var Arcfour = /** @class */ (function () {
function Arcfour() {
this.i = 0;
this.j = 0;
this.S = [];
}
// Arcfour.prototype.init = ARC4init;
// Initialize arcfour context from key, an array of ints, each from [0..255]
Arcfour.prototype.init = function (key) {
var i;
var j;
var t;
for (i = 0; i < 256; ++i) {
this.S[i] = i;
}
j = 0;
for (i = 0; i < 256; ++i) {
j = (j + this.S[i] + key[i % key.length]) & 255;
t = this.S[i];
this.S[i] = this.S[j];
this.S[j] = t;
}
this.i = 0;
this.j = 0;
};
// Arcfour.prototype.next = ARC4next;
Arcfour.prototype.next = function () {
var t;
this.i = (this.i + 1) & 255;
this.j = (this.j + this.S[this.i]) & 255;
t = this.S[this.i];
this.S[this.i] = this.S[this.j];
this.S[this.j] = t;
return this.S[(t + this.S[this.i]) & 255];
};
return Arcfour;
}());
export { Arcfour };
// Plug in your RNG constructor here
export function prng_newstate() {
return new Arcfour();
}
// Pool size must be a multiple of 4 and greater than 32.
// An array of bytes the size of the pool will be passed to init()
export var rng_psize = 256;
Version data entries
9 entries across 9 versions & 1 rubygems