/examples/dynamictable/public/phpolait/jsolait/lib/crypto.js

 
Module("crypto", "0.1.2", function(mod){
mod.listEncrypters=function(){
var c=[];
for(var attr in String.prototype){
if(attr.slice(0, 8) == "encrypt_"){
c.push(attr.slice(8));
}
}
return c;
}
mod.listDecrypters=function(){
var c=[];
for(var attr in String.prototype){
if(attr.slice(0, 8) == "decrypt_"){
c.push(attr.slice(8));
}
}
return c;
}
String.prototype.encrypt=function(crydec){
var n = "encrypt_" + crydec;
if(String.prototype[n]){
var args=[];
for(var i=1;i<arguments.length;i++){
args[i-1] = arguments[i];
}
return String.prototype[n].apply(this, args);
}else{
throw new mod.Exception("Decrypter '%s' not found.".format(crydec));
}
}
String.prototype.decrypt=function(crydec){
var n = "decrypt_" + crydec;
if(String.prototype[n]){
var args=[];
for(var i=1;i<arguments.length;i++){
args[i-1] = arguments[i];
}
return String.prototype[n].apply(this, args);
}else{
throw new mod.Exception("Encrypter '%s' not found.".format(crydec));
}
}
String.prototype.encrypt_xor=function(key){
var e=new Array(this.length);
var l=key.length;
for(var i=0;i<this.length;i++){
e[i] = String.fromCharCode(this.charCodeAt(i) ^ key.charCodeAt(i % l));
}
return e.join("");
}
String.prototype.decrypt_xor=String.prototype.encrypt_xor;
String.prototype.encrypt_rc4=function(key){
var sbox = new Array (256);
for (var i=0; i<256; i++){
sbox[i]=i;
}
var j=0;
for (var i=0; i < 256; i++) {
j = (j + sbox[i] + key.charCodeAt(i % key.length)) % 256;
var tmp = sbox[i];
sbox[i] = sbox[j];
sbox[j] = tmp;
}
var i=256;    
var j=256;
var rslt=new Array(this.length);
for (var k=0; k < this.length; k++) {
i = (i + 1) % 256;
j = (j + sbox[i]) % 256;
var tmp = sbox[i];
sbox[i] = sbox[j];
sbox[j] = tmp;
t = (sbox[i] + sbox[j]) % 256;
rslt[k] = String.fromCharCode(this.charCodeAt(k) ^ sbox[t]);
}
return rslt.join("");
}
String.prototype.decrypt_rc4=String.prototype.encrypt_rc4;
})