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Función «descifra» del webchat de IRC-Hispano - Terra
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public function descifra(ping:String, claveCifrado:String) : String | |
{ | |
var t:ByteArray = Base64.decodeToByteArray(ping); | |
var k:ByteArray = Base64.decodeToByteArray(claveCifrado); | |
var v: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); | |
aes.decrypt(v); | |
aes.dispose(); | |
var tmp:String = v.toString().toUpperCase(); | |
var rnd:Random = new Random(); | |
rnd.autoSeed(); | |
var s:ByteArray = new ByteArray(); | |
rnd.nextBytes(s,8); | |
k = Base64.decodeToByteArray(claveCifrado); | |
k.position = 24; | |
k.writeBytes(s,0,8); | |
k.position = 0; | |
v.position = 0; | |
v.writeMultiByte(tmp,"us-ascii"); | |
var aes2:AESKey = new AESKey(k); | |
aes2.encrypt(v); | |
aes2.dispose(); | |
var r:ByteArray = new ByteArray(); | |
r.writeBytes(s,0,8); | |
r.position = 8; | |
r.writeBytes(v,0,16); | |
r.position = 0; | |
var resultado:String = Base64.encodeByteArray(r); | |
return resultado; | |
} |
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