/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE319_Cleartext_Tx_Sensitive_Info__listen_tcp_passwordAuth_31.java
Label Definition File: CWE319_Cleartext_Tx_Sensitive_Info.label.xml
Template File: sources-sinks-31.tmpl.java
*/
/*
 * @description
 * CWE: 319 Cleartext Transmission of Sensitive Information
 * BadSource: listen_tcp Read password using a listening tcp connection
 * GoodSource: Set password to a hardcoded value (one that was not sent over the network)
 * Sinks: passwordAuth
 *    GoodSink: Decrypt password before using in PasswordAuthentication()
 *    BadSink : Use password directly in PasswordAuthentication()
 * Flow Variant: 31 Data flow: make a copy of data within the same method
 *
 * */





import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.net.Socket;
import java.net.ServerSocket;

import java.util.logging.Level;

import java.net.PasswordAuthentication;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

public class CWE319_Cleartext_Tx_Sensitive_Info__listen_tcp_passwordAuth_31 extends AbstractTestCase
{
    public void bad() throws Throwable
    {
        String passwordCopy;
        {
            String password;

            password = ""; /* init password */

            /* Read data using a listening tcp connection */
            {
                ServerSocket listener = null;
                Socket socket = null;
                BufferedReader readerBuffered = null;
                InputStreamReader readerInputStream = null;

                try
                {
                    /* read input from socket */
                    listener = new ServerSocket(39543);
                    socket = listener.accept();

                    readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);

                    /* POTENTIAL FLAW: Read password using a listening tcp connection */
                    password = readerBuffered.readLine();
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
                }
                finally
                {
                    /* clean up stream reading objects */
                    try
                    {
                        if (readerBuffered != null)
                        {
                            readerBuffered.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
                    }

                    try
                    {
                        if (readerInputStream != null)
                        {
                            readerInputStream.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
                    }

                    /* clean up socket objects */
                    try
                    {
                        if (socket != null)
                        {
                            socket.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO);
                    }

                    try
                    {
                        if (listener != null)
                        {
                            listener.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing ServerSocket", exceptIO);
                    }
                }
            }

            passwordCopy = password;
        }
        {
            String password = passwordCopy;

            if (password != null)
            {
                /* POTENTIAL FLAW: Use password directly in PasswordAuthentication() */
                PasswordAuthentication credentials = new PasswordAuthentication("user", password.toCharArray());
                IO.writeLine(credentials.toString());
            }

        }
    }

    public void good() throws Throwable
    {
        goodG2B();
        goodB2G();
    }

    /* goodG2B() - use goodsource and badsink */
    private void goodG2B() throws Throwable
    {
        String passwordCopy;
        {
            String password;

            /* FIX: Use a hardcoded password as the password (it was not sent over the network) */
            /* INCIDENTAL FLAW: CWE-259 Hard Coded Password */
            password = "Password1234!";

            passwordCopy = password;
        }
        {
            String password = passwordCopy;

            if (password != null)
            {
                /* POTENTIAL FLAW: Use password directly in PasswordAuthentication() */
                PasswordAuthentication credentials = new PasswordAuthentication("user", password.toCharArray());
                IO.writeLine(credentials.toString());
            }

        }
    }

    /* goodB2G() - use badsource and goodsink */
    private void goodB2G() throws Throwable
    {
        String passwordCopy;
        {
            String password;

            password = ""; /* init password */

            /* Read data using a listening tcp connection */
            {
                ServerSocket listener = null;
                Socket socket = null;
                BufferedReader readerBuffered = null;
                InputStreamReader readerInputStream = null;

                try
                {
                    /* read input from socket */
                    listener = new ServerSocket(39543);
                    socket = listener.accept();

                    readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);

                    /* POTENTIAL FLAW: Read password using a listening tcp connection */
                    password = readerBuffered.readLine();
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
                }
                finally
                {
                    /* clean up stream reading objects */
                    try
                    {
                        if (readerBuffered != null)
                        {
                            readerBuffered.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
                    }

                    try
                    {
                        if (readerInputStream != null)
                        {
                            readerInputStream.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
                    }

                    /* clean up socket objects */
                    try
                    {
                        if (socket != null)
                        {
                            socket.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO);
                    }

                    try
                    {
                        if (listener != null)
                        {
                            listener.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing ServerSocket", exceptIO);
                    }
                }
            }

            passwordCopy = password;
        }
        {
            String password = passwordCopy;

            if (password != null)
            {
                /* FIX: Decrypt password before using in PasswordAuthentication() */
                {
                    Cipher aesCipher = Cipher.getInstance("AES");
                    /* INCIDENTAL: CWE-321: Use of Hard-coded Cryptographic Key */
                    SecretKeySpec secretKeySpec = new SecretKeySpec("ABCDEFGHABCDEFGH".getBytes("UTF-8"), "AES");
                    aesCipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
                    password = new String(aesCipher.doFinal(password.getBytes("UTF-8")), "UTF-8");
                }
                PasswordAuthentication credentials = new PasswordAuthentication("user", password.toCharArray());
                IO.writeLine(credentials.toString());
            }

        }
    }

    /* Below is the main(). It is only used when building this testcase on
     * its own for testing or for building a binary to use in testing binary
     * analysis tools. It is not used when compiling all the testcases as one
     * application, which is how source code analysis tools are tested.
     */
    public static void main(String[] args) throws ClassNotFoundException,
           InstantiationException, IllegalAccessException
    {
        mainFromParent(args);
    }
}
