Examples of ch.ethz.ssh2.crypto.cipher.AES

ch.ethz.ssh2.crypto.cipher.BlockCipher
nist.gov/encryption/aes/">http://csrc.nist.gov/encryption/aes/ . This implementation is based on optimizations from Dr. Brian Gladman's paper and C code at http://fp.gladman.plus.com/cryptography_technology/rijndael/ There are three levels of tradeoff of speed vs memory Because java has no preprocessor, they are written as three separate classes from which to choose The fastest uses 8Kbytes of static tables to precompute round calculations, 4 256 word tables for encryption and 4 for decryption. The middle performance version uses only one 256 word table for each, for a total of 2Kbytes, adding 12 rotate operations per round to compute the values contained in the other tables from the contents of the first The slowest version uses no static tables at all and computes the values in each round
This file contains the fast version with 8Kbytes of static tables for round precomputation @author See comments in the source file @version $Id: AES.java,v 1.4 2006/02/02 09:11:03 cplattne Exp $


      Session sess = conn.openSession();


      sess.execCommand("echo \"Text on STDOUT\"; echo \"Text on STDERR\" >&2");


      InputStream stdout = new StreamGobbler(sess.getStdout());
      InputStream stderr = new StreamGobbler(sess.getStderr());
  
      BufferedReader stdoutReader = new BufferedReader(new InputStreamReader(stdout));
      BufferedReader stderrReader = new BufferedReader(new InputStreamReader(stderr));
      
      System.out.println("Here is the output from stdout:");

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      Session sess = conn.openSession();


      sess.execCommand("uname -a && date && uptime && who");


      InputStream stdout = new StreamGobbler(sess.getStdout());
      BufferedReader br = new BufferedReader(new InputStreamReader(stdout));


      System.out.println("Here is some information about the remote host:");


      while (true)

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      Session sess = conn.openSession();


      sess.execCommand("uname -a && date && uptime && who");


      InputStream stdout = new StreamGobbler(sess.getStdout());


      BufferedReader br = new BufferedReader(new InputStreamReader(stdout));


      System.out.println("Here is some information about the remote host:");

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      objSSHSession = this.getSshConnection().openSession();
      logger.debug("Executing command " + checkShellCommand);
      objSSHSession.execCommand(checkShellCommand);


      logger.debug("output to stdout for remote command: " + checkShellCommand);
      ipsStdOut = new StreamGobbler(objSSHSession.getStdout());
      ipsStdErr = new StreamGobbler(objSSHSession.getStderr());
      BufferedReader stdoutReader = new BufferedReader(new InputStreamReader(ipsStdOut));
      String stdOut = "";
      while (true) {
        String line = stdoutReader.readLine();
        if (line == null)

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      this.getSshSession().execCommand(strCmd);


      logger.info("output to stdout for remote command: " + strCmd);


      ipsStdOut = new StreamGobbler(this.getSshSession().getStdout());
      ipsStdErr = new StreamGobbler(this.getSshSession().getStderr());
      BufferedReader stdoutReader = new BufferedReader(new InputStreamReader(ipsStdOut));
      strbStdoutOutput = new StringBuffer();
      while (true) {
        String line = stdoutReader.readLine();
        if (line == null)

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        {
            String message = "Cannot execute remote command: " + command;
            throw new CommandAbortedException( message, message );
        }


        InputStream stdout = new StreamGobbler( session.getStdout() );
        InputStream stderr = new StreamGobbler( session.getStderr() );
        stderrReader = new BufferedReader( new InputStreamReader( stderr ) );
        setInputStream( new LoggedDataInputStream( stdout ) );
        setOutputStream( new LoggedDataOutputStream( session.getStdin() ) );
    }

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      des.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 8));
      bc = new CBCMode(des, salt, false);
    }
    else if (algo.equals("AES-128-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 16));
      bc = new CBCMode(aes, salt, false);
    }
    else if (algo.equals("AES-192-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 24));
      bc = new CBCMode(aes, salt, false);
    }
    else if (algo.equals("AES-256-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 32));
      bc = new CBCMode(aes, salt, false);
    }
    else
    {
      throw new IOException("Cannot decrypt PEM structure, unknown cipher " + algo);

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      des.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 8));
      bc = new CBCMode(des, salt, false);
    }
    else if (algo.equals("AES-128-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 16));
      bc = new CBCMode(aes, salt, false);
    }
    else if (algo.equals("AES-192-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 24));
      bc = new CBCMode(aes, salt, false);
    }
    else if (algo.equals("AES-256-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 32));
      bc = new CBCMode(aes, salt, false);
    }
    else
    {
      throw new IOException("Cannot decrypt PEM structure, unknown cipher " + algo);

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      des.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 8));
      bc = new CBCMode(des, salt, false);
    }
    else if (algo.equals("AES-128-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 16));
      bc = new CBCMode(aes, salt, false);
    }
    else if (algo.equals("AES-192-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 24));
      bc = new CBCMode(aes, salt, false);
    }
    else if (algo.equals("AES-256-CBC"))
    {
      AES aes = new AES();
      aes.init(false, generateKeyFromPasswordSaltWithMD5(pw, salt, 32));
      bc = new CBCMode(aes, salt, false);
    }
    else
    {
      throw new IOException("Cannot decrypt PEM structure, unknown cipher " + algo);

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    /* Tell the other side that we start using the new material */


    PacketNewKeys ign = new PacketNewKeys();
    tm.sendKexMessage(ign.getPayload());


    BlockCipher cbc;
    MAC mac;


    try
    {
      cbc = BlockCipherFactory.createCipher(kxs.np.enc_algo_client_to_server, true, km.enc_key_client_to_server,

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