Created
February 18, 2014 13:00
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public function descifra_ip(cookie:String, claveCifrado:String) : String { | |
var t:ByteArray = Base64.decodeToByteArray(cookie); | |
var k:ByteArray = Base64.decodeToByteArray(claveCifrado); | |
var v:ByteArray = new ByteArray(); | |
var v2:ByteArray = new ByteArray(); | |
var v3:ByteArray = new ByteArray(); | |
var r:ByteArray = new ByteArray(); | |
k.position = 24; | |
k.writeBytes(t,0,8); | |
v.writeBytes(t,8,16); | |
k.position = 0; | |
v.position = 0; | |
var aes:AESKey = new AESKey(k); | |
var i:int = 8; | |
while(i < t.length) | |
{ | |
v.position = 0; | |
v2.position = 0; | |
v3.position = 0; | |
v.writeBytes(t,i,16); | |
v3.writeBytes(v,0,16); | |
aes.decrypt(v); | |
this.xor(v,v2); | |
v2.writeBytes(v3,0,16); | |
r.writeBytes(v,0,16); | |
i = i + 16; | |
} | |
aes.dispose(); | |
var resultado:String = r.toString(); | |
return resultado; | |
} | |
public function xor(destino:ByteArray, origen:ByteArray) : void { | |
var i:int = 0; | |
while(i < destino.length) | |
{ | |
destino[i] = destino[i] ^ origen[i]; | |
i++; | |
} | |
} |
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