Esempio n. 1
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  public static void main(String[] args) {
    try {

      AlgorithmParameterGenerator paramGen = AlgorithmParameterGenerator.getInstance("DSA");
      paramGen.init(1024);

      AlgorithmParameters params = paramGen.generateParameters();

      DSAParameterSpec dsaParameterSpec = params.getParameterSpec(DSAParameterSpec.class);

      KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("DSA");
      keyPairGenerator.initialize(dsaParameterSpec);

      KeyPair keyPair = keyPairGenerator.generateKeyPair();

      PublicKey publicKey = keyPair.getPublic();
      PrivateKey privateKey = keyPair.getPrivate();

      saveKey("BpubKey", publicKey);
      saveKey("BprivKey", privateKey);

    } catch (NoSuchAlgorithmException
        | InvalidParameterSpecException
        | InvalidAlgorithmParameterException e) {
      e.printStackTrace();
    }
  }
Esempio n. 2
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  public void run() {
    try {
      ObjectInputStream ois = new ObjectInputStream(s.getInputStream());
      ObjectOutputStream oos = new ObjectOutputStream(s.getOutputStream());

      BigInteger bg = dhSpec.getG();
      BigInteger bp = dhSpec.getP();
      oos.writeObject(bg);
      oos.writeObject(bp);

      KeyPairGenerator kpg = KeyPairGenerator.getInstance("DH");
      kpg.initialize(1024);
      KeyPair kpa = (KeyPair) ois.readObject();
      KeyAgreement dh = KeyAgreement.getInstance("DH");
      KeyPair kp = kpg.generateKeyPair();

      oos.writeObject(kp);

      dh.init(kp.getPrivate());
      Key pk = dh.doPhase(kpa.getPublic(), true);

      MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
      byte[] rawbits = sha256.digest(dh.generateSecret());

      Cipher c = Cipher.getInstance(CIPHER_MODE);
      SecretKey key = new SecretKeySpec(rawbits, 0, 16, "AES");
      byte ivbits[] = (byte[]) ois.readObject();
      IvParameterSpec iv = new IvParameterSpec(ivbits);
      c.init(Cipher.DECRYPT_MODE, key, iv);

      Mac m = Mac.getInstance("HmacSHA1");
      SecretKey mackey = new SecretKeySpec(rawbits, 16, 16, "HmacSHA1");
      m.init(mackey);

      byte ciphertext[], cleartext[], mac[];
      try {
        while (true) {
          ciphertext = (byte[]) ois.readObject();
          mac = (byte[]) ois.readObject();
          if (Arrays.equals(mac, m.doFinal(ciphertext))) {
            cleartext = c.update(ciphertext);
            System.out.println(ct + " : " + new String(cleartext, "UTF-8"));
          } else {
            // System.exit(1);
            System.out.println(ct + "error");
          }
        }
      } catch (EOFException e) {
        cleartext = c.doFinal();
        System.out.println(ct + " : " + new String(cleartext, "UTF-8"));
        System.out.println("[" + ct + "]");
      } finally {
        if (ois != null) ois.close();
        if (oos != null) oos.close();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
Esempio n. 3
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  public boolean createSelfSignedKeystore(
      String cn,
      String keystoreFile,
      String keystorePassword,
      String privateKeyPassword,
      String privateKeyAlias) {
    KeyStore ks = null;

    try {
      ks = KeyStore.getInstance("JKS");
      ks.load(null, null);

      KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
      keyGen.initialize(1024, new SecureRandom());
      KeyPair keypair = keyGen.generateKeyPair();
      PrivateKey privkey = keypair.getPrivate();
      PublicKey pubkey = keypair.getPublic();

      Hashtable<DERObjectIdentifier, String> attrs = new Hashtable<DERObjectIdentifier, String>();
      Vector<DERObjectIdentifier> ordering = new Vector<DERObjectIdentifier>();
      ordering.add(X509Name.CN);
      attrs.put(X509Name.CN, cn);
      X509Name issuerDN = new X509Name(ordering, attrs);
      X509Name subjectDN = new X509Name(ordering, attrs);

      Date validFrom = new Date();
      validFrom.setTime(validFrom.getTime() - (10 * 60 * 1000));
      Date validTo = new Date();
      validTo.setTime(validTo.getTime() + (20 * (24 * 60 * 60 * 1000)));

      X509V3CertificateGenerator x509 = new X509V3CertificateGenerator();
      x509.setSignatureAlgorithm("SHA1withDSA");
      x509.setIssuerDN(issuerDN);
      x509.setSubjectDN(subjectDN);
      x509.setPublicKey(pubkey);
      x509.setNotBefore(validFrom);
      x509.setNotAfter(validTo);
      x509.setSerialNumber(new BigInteger(128, new Random()));

      X509Certificate[] cert = new X509Certificate[1];
      cert[0] = x509.generate(privkey, "BC");
      java.security.cert.Certificate[] chain = new java.security.cert.Certificate[1];
      chain[0] = cert[0];

      ks.setKeyEntry(privateKeyAlias, privkey, privateKeyPassword.toCharArray(), cert);
      ks.setKeyEntry(privateKeyAlias, privkey, privateKeyPassword.toCharArray(), chain);
      ks.store(new FileOutputStream(keystoreFile), keystorePassword.toCharArray());

      String IDP_RFC_CERT = "WEB-INF/guanxi_idp/keystore/guanxi_idp_cert.txt";

      PEMWriter pemWriter = new PEMWriter(new FileWriter(servletContext.getRealPath(IDP_RFC_CERT)));
      pemWriter.writeObject(cert[0]);
      pemWriter.close();

      return true;
    } catch (Exception se) {
      return false;
    }
  }
Esempio n. 4
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 /**
  * Creates a file server. Uses aConnectedSocket to create input/output stream readers to
  * communicate with a client.
  *
  * @param aConnectedSocket Socket through which to communicated with a client.
  */
 public FileServer(Socket aConnectedSocket) throws IOException, NoSuchAlgorithmException {
   connectedSocket = aConnectedSocket;
   // Set up input/output streams
   inFromClient = new BufferedReader(new InputStreamReader(connectedSocket.getInputStream()));
   outToClient = new DataOutputStream(connectedSocket.getOutputStream());
   // generate keys
   KeyPair keyPair = KeyPairGenerator.getInstance("RSA").generateKeyPair();
   privateKey = keyPair.getPrivate();
   publicKey = keyPair.getPublic();
 }
Esempio n. 5
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 /**
  * We need a root CA as a file to add to the browser under which all certificates will be trusted.
  *
  * @throws Exception
  */
 private void createRootCA() throws Exception {
   KeyPair _keyPair = newKeyPair();
   rootCA = buildRootCert(Configuration.getRootCaName(), _keyPair);
   writePEMObject(rootCAPath, rootCA);
   writePEMObject(Configuration.getRootKeyPath(), _keyPair.getPrivate());
   keystore.setKeyEntry(
       Configuration.getRootCaName(),
       _keyPair.getPrivate(),
       KEYSTORE_PASSWORD.toCharArray(),
       new X509Certificate[] {rootCA});
 }
Esempio n. 6
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 private void generateRSAKeypair() {
   try {
     KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
     keyGen.initialize(1024);
     KeyPair keys = keyGen.generateKeyPair();
     publicKey = keys.getPublic();
     privateKey = keys.getPrivate();
   } catch (Exception e) {
     e.printStackTrace();
   }
 }
  /**
   * Creates an X509 version3 certificate
   *
   * @param algorithm (e.g RSA, DSA, etc...)
   * @param bits Cet strength e.g 1024
   * @param issuer Issuer string e.g "O=Grid,OU=OGSA,CN=ACME"
   * @param subject Subject string e.g "O=Grid,OU=OGSA,CN=John Doe"
   * @param months time to live
   * @param outPrivKey OutputStream to the private key in PKCS#8 format (Note: this key will not be
   *     encrypted)
   * @return X509 V3 Certificate
   * @throws GeneralSecurityException
   */
  public static X509Certificate createX509Cert(
      String algorithm,
      int bits,
      String issuer,
      String subject,
      int months,
      OutputStream outPrivKey,
      String sigAlg,
      String pwd)
      throws GeneralSecurityException, IOException {
    // String sigAlg = "SHA1WithRSAEncryption";

    // Priv key is in PKCS#8 format
    KeyPair kp = CertUtil.generateKeyPair(algorithm, bits);

    // must convert from PKCS#8 to PKCS#1 to encrypt with BouncyCastleOpenSSLKey
    // Priv key must be DER encoded key data in PKCS#1 format to be encrypted.
    OpenSSLKey PKCS_8key = new BouncyCastleOpenSSLKey(kp.getPrivate());

    long serial = 0;

    logger.debug(
        "createX509Cert Alg: "
            + algorithm
            + " bits:"
            + bits
            + " Issuer: "
            + issuer
            + " Subject: "
            + subject);
    logger.debug(
        "createX509Cert Sig alg:"
            + sigAlg
            + " Priv key format:"
            + PKCS_8key.getPrivateKey().getFormat());

    // if ( pwd != null && ! PKCS_8key.isEncrypted())
    //	PKCS_8key.encrypt(pwd);

    // write private key
    PKCS_8key.writeTo(outPrivKey);

    // return X509 Cert
    return createX509V3Certificate(
        kp.getPublic(), kp.getPrivate(), months, issuer, subject, serial, sigAlg);
  }
Esempio n. 8
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  public static void main(String[] args) {
    try {
      KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA", "SUN");
      SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
      keyGen.initialize(1024, random);

      KeyPair pair = keyGen.generateKeyPair();
      PrivateKey priv = pair.getPrivate();
      PublicKey pub = pair.getPublic();

      byte[] encPriv = priv.getEncoded();
      FileOutputStream privfos = new FileOutputStream("DSAPrivateKey.key");
      privfos.write(encPriv);
      privfos.close();

      byte[] encPub = pub.getEncoded();
      FileOutputStream pubfos = new FileOutputStream("DSAPublicKey.key");
      pubfos.write(encPub);
      pubfos.close();

    } catch (Exception e) {
      e.printStackTrace();
    }
  }
Esempio n. 9
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  /**
   * Generates the public/private key pair from the init params
   *
   * @throws Exception
   */
  public void initKeyPair() throws Exception {
    // generate keys according to the specified algorithms
    // generate publicKey and Private Key
    KeyPairGenerator KpairGen = null;
    if (asymProvider != null && !asymProvider.trim().isEmpty())
      KpairGen = KeyPairGenerator.getInstance(getAlgorithm(asymAlgorithm), asymProvider);
    else KpairGen = KeyPairGenerator.getInstance(getAlgorithm(asymAlgorithm));
    KpairGen.initialize(asymInit, new SecureRandom());
    Kpair = KpairGen.generateKeyPair();

    // set up the Cipher to decrypt secret key responses encrypted with our key

    if (asymProvider != null && !asymProvider.trim().isEmpty())
      asymCipher = Cipher.getInstance(asymAlgorithm, asymProvider);
    else asymCipher = Cipher.getInstance(asymAlgorithm);

    asymCipher.init(Cipher.DECRYPT_MODE, Kpair.getPrivate());
    log.debug("asym algo initialized");
  }
Esempio n. 10
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 private X509Certificate buildRootCert(String domain, KeyPair _keyPair) throws Exception {
   X509v3CertificateBuilder certificateBuilder = createX509v3CertificateBuilder(domain, _keyPair);
   certificateBuilder.addExtension(Extension.basicConstraints, true, new BasicConstraints(true));
   return createX509Certificate(certificateBuilder, _keyPair.getPrivate());
 }
Esempio n. 11
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 protected void generateKeyAndPutIntoKeyStore(final String domain) throws Exception {
   KeyPair keyPair = newKeyPair();
   X509Certificate cert = buildSignedCert(domain, keyPair);
   addCertToKeystore(cert, keyPair.getPrivate(), domain);
 }
Esempio n. 12
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  public static void main(String[] args) {
    try {
      if (args[0].equals("-genkey")) {
        KeyPairGenerator pairgen = KeyPairGenerator.getInstance("RSA");
        SecureRandom random = new SecureRandom();
        pairgen.initialize(KEYSIZE, random);
        KeyPair keyPair = pairgen.generateKeyPair();
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(args[1]));
        out.writeObject(keyPair.getPublic());
        out.close();
        out = new ObjectOutputStream(new FileOutputStream(args[2]));
        out.writeObject(keyPair.getPrivate());
        out.close();
      } else if (args[0].equals("-encrypt")) {
        KeyGenerator keygen = KeyGenerator.getInstance("AES");
        SecureRandom random = new SecureRandom();
        keygen.init(random);
        SecretKey key = keygen.generateKey();

        // wrap with RSA public key
        ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
        Key publicKey = (Key) keyIn.readObject();
        keyIn.close();

        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.WRAP_MODE, publicKey);
        byte[] wrappedKey = cipher.wrap(key);
        DataOutputStream out = new DataOutputStream(new FileOutputStream(args[2]));
        out.writeInt(wrappedKey.length);
        out.write(wrappedKey);

        InputStream in = new FileInputStream(args[1]);
        cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        crypt(in, out, cipher);
        in.close();
        out.close();
      } else {
        DataInputStream in = new DataInputStream(new FileInputStream(args[1]));
        int length = in.readInt();
        byte[] wrappedKey = new byte[length];
        in.read(wrappedKey, 0, length);

        // unwrap with RSA private key
        ObjectInputStream keyIn = new ObjectInputStream(new FileInputStream(args[3]));
        Key privateKey = (Key) keyIn.readObject();
        keyIn.close();

        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.UNWRAP_MODE, privateKey);
        Key key = cipher.unwrap(wrappedKey, "AES", Cipher.SECRET_KEY);

        OutputStream out = new FileOutputStream(args[2]);
        cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, key);

        crypt(in, out, cipher);
        in.close();
        out.close();
      }
    } catch (IOException e) {
      e.printStackTrace();
    } catch (GeneralSecurityException e) {
      e.printStackTrace();
    } catch (ClassNotFoundException e) {
      e.printStackTrace();
    }
  }
 private String getPubEncoded() {
   return Base64.getEncoder()
       .encodeToString(new X509EncodedKeySpec(pair.getPublic().getEncoded()).getEncoded());
 }
Esempio n. 14
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 /** send client's public key to server and request server's public key */
 private void sendKeyRequest() {
   Message newMsg =
       new Message(keyServerAddr, local_addr, Kpair.getPublic().getEncoded())
           .putHeader(this.id, new EncryptHeader(EncryptHeader.KEY_REQUEST, getSymVersion()));
   down_prot.down(new Event(Event.MSG, newMsg));
 }
Esempio n. 15
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 private SubjectPublicKeyInfo getSubjectPublicKeyInfo(KeyPair _keyPair) {
   byte[] encodedPublicKey = _keyPair.getPublic().getEncoded();
   return new SubjectPublicKeyInfo(ASN1Sequence.getInstance(encodedPublicKey));
 }
  public static void main(String[] args) throws Exception {
    // prompt user to enter a port number

    System.out.print("Enter the port number: ");
    Scanner scan = new Scanner(System.in);
    int port = scan.nextInt();
    scan.nextLine();
    System.out.print("Enter the host name: ");
    String hostName = scan.nextLine();

    // Initialize a key pair generator with the SKIP parameters we sepcified, and genrating a pair
    // This will take a while: 5...15 seconrds

    System.out.println("Generating a Diffie-Hellman keypair: ");
    KeyPairGenerator kpg = KeyPairGenerator.getInstance("DH");
    kpg.initialize(PARAMETER_SPEC);
    KeyPair keyPair = kpg.genKeyPair();
    System.out.println("key pair has been made...");

    // one the key pair has been generated, we want to listen on
    // a given port for a connection to come in
    // once we get a connection, we will get two streams, One for input
    // and one for output
    // open a port and wait for a connection

    ServerSocket ss = new ServerSocket(port);
    System.out.println("Listeining on port " + port + " ...");
    Socket socket = ss.accept();

    // use to output and input primitive data type

    DataOutputStream out = new DataOutputStream(socket.getOutputStream());

    // next thing to do is send our public key and receive client's
    // this corresponds to server step 3 and step 4 in the diagram

    System.out.println("Sending my public key...");
    byte[] keyBytes = keyPair.getPublic().getEncoded();
    out.writeInt(keyBytes.length);
    out.write(keyBytes);
    System.out.println("Server public key bytes: " + CryptoUtils.toHex(keyBytes));

    // receive the client's public key

    System.out.println("Receiving client's public key...");
    DataInputStream in = new DataInputStream(socket.getInputStream());
    keyBytes = new byte[in.readInt()];
    in.readFully(keyBytes);

    // create client's public key

    KeyFactory kf = KeyFactory.getInstance("DH");
    X509EncodedKeySpec x509Spec = new X509EncodedKeySpec(keyBytes);
    PublicKey clientPublicKey = kf.generatePublic(x509Spec);

    // print out client's public key bytes

    System.out.println(
        "Client public key bytes: " + CryptoUtils.toHex(clientPublicKey.getEncoded()));

    // we can now use the client's public key and
    // our own private key to perform the key agreement

    System.out.println("Performing the key agreement ... ");
    KeyAgreement ka = KeyAgreement.getInstance("DH");
    ka.init(keyPair.getPrivate());
    ka.doPhase(clientPublicKey, true);

    // in a chat application, each character is sendt over the wire, separetly encrypted,
    // Instead of using ECB, we are goin to use CFB, with a block size of 8 bits(1byte)
    // to send each character. We will encrypt the same character in a different way
    // each time. But in order to use CFB8, we need an IVof 8 bytes. We will create
    // that IV randomly and and send it to the client. It doesn't matter if somoene
    // eavesdrops on the IV when it is sent over the wire. it's not sensitive info

    // creating the IV and sending it corresponds to step 6 and 7

    byte[] iv = new byte[8];
    SecureRandom sr = new SecureRandom();
    sr.nextBytes(iv);
    out.write(iv);

    // we generate the secret byte array we share with the client and use it
    // to create the session key (Step 8)

    byte[] sessionKeyBytes = ka.generateSecret();

    // create the session key

    SecretKeyFactory skf = SecretKeyFactory.getInstance("DESede");
    DESedeKeySpec DESedeSpec = new DESedeKeySpec(sessionKeyBytes);
    SecretKey sessionKey = skf.generateSecret(DESedeSpec);

    // printout session key bytes

    System.out.println("Session key bytes: " + CryptoUtils.toHex(sessionKey.getEncoded()));

    // now use tha that session key and IV to create a CipherInputStream. We will use them to read
    // all character
    // that are sent to us by the client

    System.out.println("Creating the cipher stream ...");
    Cipher decrypter = Cipher.getInstance("DESede/CFB8/NoPadding");
    IvParameterSpec spec = new IvParameterSpec(iv);
    decrypter.init(Cipher.DECRYPT_MODE, sessionKey, spec);
    CipherInputStream cipherIn = new CipherInputStream(socket.getInputStream(), decrypter);

    // we just keep reading the input and print int to the screen, until -1 sent over

    int theCharacter = 0;
    theCharacter = cipherIn.read();
    while (theCharacter != -1) {
      System.out.print((char) theCharacter);
      theCharacter = cipherIn.read();
    }
    // once -1 is received we want to close up our stream and exit

    cipherIn.close();
    in.close();
    out.close();
    socket.close();
  }
 private String getPrivEncoded() {
   return Base64.getEncoder()
       .encodeToString(new PKCS8EncodedKeySpec(pair.getPrivate().getEncoded()).getEncoded());
 }