Example usage for java.security KeyPair getPublic

List of usage examples for java.security KeyPair getPublic

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Introduction

In this page you can find the example usage for java.security KeyPair getPublic.

Prototype

public PublicKey getPublic()

Source Link

Document

Returns a reference to the public key component of this key pair.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);/* w w w.ja  va2 s .  c  o m*/
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    KeyFactory keyFactory = KeyFactory.getInstance("DSA");

}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String password = "password";

    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
    keyPairGenerator.initialize(1024);//from w  w w .j  a  v a  2 s .c o  m
    KeyPair keyPair = keyPairGenerator.genKeyPair();
    String publicKeyFilename = "public";

    byte[] publicKeyBytes = keyPair.getPublic().getEncoded();

    FileOutputStream fos = new FileOutputStream(publicKeyFilename);
    fos.write(publicKeyBytes);
    fos.close();

    String privateKeyFilename = "privateKeyFilename";

    byte[] privateKeyBytes = keyPair.getPrivate().getEncoded();

    byte[] encryptedPrivateKeyBytes = passwordEncrypt(password.toCharArray(), privateKeyBytes);

    fos = new FileOutputStream(privateKeyFilename);
    fos.write(encryptedPrivateKeyBytes);
    fos.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);// w w w. j  ava 2 s  .co m
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    KeyFactory keyFactory = KeyFactory.getInstance("DSA");
    KeySpec publicKeySpec = new DSAPublicKeySpec(y, p, q, g);
    PublicKey publicKey1 = keyFactory.generatePublic(publicKeySpec);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);/*from w  w  w.  j a va  2  s  .c  o m*/
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    KeyFactory keyFactory = KeyFactory.getInstance("DSA");
    KeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g);
    PrivateKey privateKey1 = keyFactory.generatePrivate(privateKeySpec);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");
    keyGenerator.init(128);// ww w. ja v a  2s.  c  o  m
    Key blowfishKey = keyGenerator.generateKey();

    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
    keyPairGenerator.initialize(1024);
    KeyPair keyPair = keyPairGenerator.genKeyPair();

    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    cipher.init(Cipher.ENCRYPT_MODE, keyPair.getPublic());

    byte[] blowfishKeyBytes = blowfishKey.getEncoded();
    System.out.println(new String(blowfishKeyBytes));
    byte[] cipherText = cipher.doFinal(blowfishKeyBytes);
    System.out.println(new String(cipherText));
    cipher.init(Cipher.DECRYPT_MODE, keyPair.getPrivate());

    byte[] decryptedKeyBytes = cipher.doFinal(cipherText);
    System.out.println(new String(decryptedKeyBytes));
    SecretKey newBlowfishKey = new SecretKeySpec(decryptedKeyBytes, "Blowfish");
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    DHParameterSpec dhParams = new DHParameterSpec(p512, g512);
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");

    keyGen.initialize(dhParams, new SecureRandom());

    KeyAgreement aKeyAgree = KeyAgreement.getInstance("DH", "BC");
    KeyPair aPair = keyGen.generateKeyPair();
    KeyAgreement bKeyAgree = KeyAgreement.getInstance("DH", "BC");
    KeyPair bPair = keyGen.generateKeyPair();

    aKeyAgree.init(aPair.getPrivate());/*  w  w  w. ja  va2  s. co  m*/
    bKeyAgree.init(bPair.getPrivate());

    aKeyAgree.doPhase(bPair.getPublic(), true);
    bKeyAgree.doPhase(aPair.getPublic(), true);

    MessageDigest hash = MessageDigest.getInstance("SHA1", "BC");
    System.out.println(new String(hash.digest(aKeyAgree.generateSecret())));
    System.out.println(new String(hash.digest(bKeyAgree.generateSecret())));
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    //Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    DHParameterSpec dhParams = new DHParameterSpec(p512, g512);
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");

    keyGen.initialize(dhParams, new SecureRandom());

    KeyAgreement aKeyAgree = KeyAgreement.getInstance("DH", "BC");
    KeyPair aPair = keyGen.generateKeyPair();
    KeyAgreement bKeyAgree = KeyAgreement.getInstance("DH", "BC");
    KeyPair bPair = keyGen.generateKeyPair();

    aKeyAgree.init(aPair.getPrivate());// w w w  .j av  a 2  s  .  c  o  m
    bKeyAgree.init(bPair.getPrivate());

    aKeyAgree.doPhase(bPair.getPublic(), true);
    bKeyAgree.doPhase(aPair.getPublic(), true);

    MessageDigest hash = MessageDigest.getInstance("SHA1", "BC");
    System.out.println(new String(hash.digest(aKeyAgree.generateSecret())));
    System.out.println(new String(hash.digest(bKeyAgree.generateSecret())));
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
    keyGen.initialize(1024);/*from  w  w  w .j ava  2 s  .com*/
    KeyPair keypair = keyGen.genKeyPair();
    DSAPrivateKey privateKey = (DSAPrivateKey) keypair.getPrivate();
    DSAPublicKey publicKey = (DSAPublicKey) keypair.getPublic();

    DSAParams dsaParams = privateKey.getParams();
    BigInteger p = dsaParams.getP();
    BigInteger q = dsaParams.getQ();
    BigInteger g = dsaParams.getG();
    BigInteger x = privateKey.getX();
    BigInteger y = publicKey.getY();

    // Create the DSA key factory
    KeyFactory keyFactory = KeyFactory.getInstance("DSA");
    // Create the DSA private key
    KeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g);
    PrivateKey privateKey1 = keyFactory.generatePrivate(privateKeySpec);

    byte[] buffer = new byte[1024];

    Signature sig = Signature.getInstance(privateKey1.getAlgorithm());
    sig.initSign(privateKey1);
    sig.update(buffer, 0, buffer.length);
}

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    int eValue = 79;
    int bitLength = 1024; // KeySize

    BigInteger e = e = new BigInteger(Integer.toString(eValue));

    KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
    kpg.initialize(bitLength);//from ww w.  j  av  a2  s.c o  m
    KeyPair kp = kpg.generateKeyPair();

    KeyFactory kfactory = KeyFactory.getInstance("RSA");
    RSAPublicKeySpec kspec = (RSAPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), RSAPublicKeySpec.class);

    kpg = KeyPairGenerator.getInstance("RSA", "SunRsaSign");

    e = new BigInteger(Integer.toString(eValue));
    System.out.println("e =" + e);
    RSAKeyGenParameterSpec param = new RSAKeyGenParameterSpec(bitLength, e);
    kpg.initialize(param);
    kp = kpg.generateKeyPair();

    kfactory = KeyFactory.getInstance("RSA", "SunRsaSign");

    kspec = (RSAPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), RSAPublicKeySpec.class);
}

From source file:com.emc.ecs.s3.sample.ECSS3Factory.java

public static void main(String[] args) {
    try {/* ww  w. j a v a 2  s  .  c o  m*/
        KeyPairGenerator keyGenerator = KeyPairGenerator.getInstance("RSA");
        keyGenerator.initialize(1024, new SecureRandom());
        KeyPair myKeyPair = keyGenerator.generateKeyPair();

        // Serialize.
        byte[] pubKeyBytes = myKeyPair.getPublic().getEncoded();
        byte[] privKeyBytes = myKeyPair.getPrivate().getEncoded();

        String pubKeyStr = new String(Base64.encodeBase64(pubKeyBytes, false), "US-ASCII");
        String privKeyStr = new String(Base64.encodeBase64(privKeyBytes, false), "US-ASCII");

        System.out.println("Public Key: " + pubKeyStr);
        System.out.println("Private Key: " + privKeyStr);
    } catch (Exception e) {
        e.printStackTrace();
    }
}