Dart Documentationsolvr:bignumArcfour

Arcfour Class

Constructors

Code new Arcfour() #

Arcfour() {
  this.i = 0;
  this.j = 0;
  this.S = new Map();
}

Methods

Code init(key) #

init(key) {
  var i, j, 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;
}

Code next() #

next() {
  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];
}

Fields

Code Map S #

Map S;

Code var i #

var i;

Code var j #

var j;