@Override
public void run() {
byte[] line = null;
byte[] bytes = null;
// TODO Auto-generated method stub
System.out.println("Welcome new users, ID: " + id + '\n');
ip = clientHandler.getClientIPAddress();
// read client public key
line = clientHandler.readBytes();
if (!(new String(Arrays.copyOfRange(line, 0, 4))).startsWith("key")) {
clientHandler.sendMessage("authentication:false");
return;
} else {
clientPublicKey = Arrays.copyOfRange(line, 4, line.length);
}
encrypt = new EncryptDatabase(clientPublicKey, Server.privateKey);
// send random number
bytes = encrypt.getEncryptedMessage(int2byte(nounce++));
clientHandler.sendBytes(bytes);
line = clientHandler.readBytes();
byte[] decipher = (new DecryptDataBase(clientPublicKey, Server.privateKey, line)).decrypt();
int r = (new BigInteger(decipher)).intValue();
if (r != nounce) {
System.out.println("nounce auth failed: \n" + r);
System.out.println();
return;
}
// read auth info.
line = clientHandler.readBytes();
line = decryptWithNounce(line);
String head = new String(Arrays.copyOfRange(line, 0, line.length - 32));
byte[] hashcode = Arrays.copyOfRange(line, line.length - 32, line.length);
System.out.println("Client id: " + id + ": " + head);
if (head.startsWith("authentication")) {
if (this.authUser(head, hashcode, clientPublicKey)) {
byte[] AuthTrue = "authentication:true".getBytes();
System.out.println("\nauthentication:true");
sendWithEncryptNounce(AuthTrue);
} else {
byte[] AuthFalse = "authentication:false".getBytes();
System.out.println("\nauthentication:frue");
sendWithEncryptNounce(AuthFalse);
this.terminate();
return;
}
} else {
System.out.println("Client didn't start with authentication, gonna drop connection. " + line);
clientHandler.sendMessage("Please authenticate yourself");
this.terminate();
return;
}
// send on line users -> ip key
this.sendClientUserIP();
this.sendClientUserTICKET(clientPublicKey);
this.terminate();
}
private void sendWithEncryptNounce(byte[] message) {
byte[] bytes = combineBytes(int2byte(nounce++), message);
bytes = encrypt.getEncryptedMessage(bytes);
clientHandler.sendBytes(bytes);
}