Example usage for javax.crypto KeyGenerator generateKey

Introduction

In this page you can find the example usage for javax.crypto KeyGenerator generateKey.

Prototype

public final SecretKey generateKey()

Source Link

Document

Generates a secret key.

Usage

From source file:Main.java

private static Key newDesInstance(String strKey) {
    Key key = null;/*from w  w w  .  j a v  a 2s. com*/
    try {
        KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");
        keyGenerator.init(new SecureRandom(strKey.getBytes()));
        key = keyGenerator.generateKey();
        keyGenerator = null;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return key;
}

From source file:Main.java

/**
 * Generate a symmetric DES3 key./*from  w  w  w.  j  a va2s  . c  o  m*/
 *
 * @return A DES3 key
 */
public static SecretKey generateSymmetricKey() throws NoSuchAlgorithmException {
    KeyGenerator symmetricKeyGenerator = KeyGenerator.getInstance(symmetricAlgorithm);
    return symmetricKeyGenerator.generateKey();
}

From source file:com.janrain.backplane.common.HmacHashUtils.java

private static SecretKey generateMacKey(String algorithm, int keySize) throws NoSuchAlgorithmException {
    KeyGenerator keyGen = KeyGenerator.getInstance(algorithm);
    keyGen.init(keySize);/*from  w  w  w.  j av  a2  s.com*/
    return keyGen.generateKey();
}

From source file:es.logongas.fpempresa.security.SecureKeyGenerator.java

public static String getSecureKey() {
    try {/*from ww  w .  j ava2  s. co m*/
        Base32 base32 = new Base32();
        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
        keyGen.init(keyLength);
        SecretKey secretKey = keyGen.generateKey();
        byte[] encoded = secretKey.getEncoded();
        return base32.encodeAsString(encoded);
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
}

From source file:birch.util.EncryptionKeyFileUtil.java

public static String createKey(String cipher, int keysize) throws InvalidKeyException,
        IllegalBlockSizeException, NoSuchAlgorithmException, NoSuchPaddingException {
    KeyGenerator keyGenerator;
    Key key;/* w w  w  .  j av a  2s .c o  m*/

    keyGenerator = KeyGenerator.getInstance(cipher);
    keyGenerator.init(keysize);
    key = keyGenerator.generateKey();

    return new String(Base64.encodeBase64(key.getEncoded()));
}

From source file:Main.java

/**
 * do not work/*from   ww  w.j  a  v  a 2s  .c o  m*/
 */
private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(128, new SecureRandom(seed)); // 192 and 256 bits may not be available
    return keyGenerator.generateKey().getEncoded();
}

From source file:com.lecaddyfute.utils.security.AESCrypto.java

public static String encrypt1(String Data) throws Exception {
    KeyGenerator keyGen = KeyGenerator.getInstance(ALGO);
    keyGen.init(128);//from   www  .ja v  a2  s . c  om
    SecretKey key = keyGen.generateKey();
    System.out.println("Generated key: " + key);
    Cipher c = Cipher.getInstance(ALGO);
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] encVal = c.doFinal(Data.getBytes("UTF8"));

    String encryptedValue = ConvertionHelper.bytesToHex(encVal);
    //        String encryptedValue = new String(Base64.encodeBase64(encVal));
    return encryptedValue;
}

From source file:com.lecaddyfute.utils.security.AESCrypto.java

public static String decrypt1(String encryptedData) throws Exception {
    KeyGenerator keyGen = KeyGenerator.getInstance(ALGO);
    keyGen.init(128);//from w  w w. j a va2  s.  c  o  m
    SecretKey key = keyGen.generateKey();
    Cipher c = Cipher.getInstance(ALGO);

    c.init(Cipher.DECRYPT_MODE, key);
    //        byte[] decordedValue = Base64.decodeBase64(encryptedData.getBytes());
    //        byte[] decValue = c.doFinal(decordedValue);
    byte[] decValue = c.doFinal(encryptedData.getBytes("UTF8"));
    String decryptedValue = new String(decValue);
    return decryptedValue;
}

From source file:de.openflorian.crypt.CipherKeyGenerator.java

/**
 * Generate Cipher Secret<br/>//ww w. j  a  v a 2  s .  c  om
 * <br/>
 * Secret is generated by Blowfish {@link KeyGenerator} and a system default
 * {@link SecureRandom} provider and Base64 encoded afterwards.
 * 
 * @return Base64 encoded {@link SecureRandom} generated encryption key
 * @throws GeneralSecurityException
 */
public static String generateKey() throws GeneralSecurityException {
    try {
        KeyGenerator gen = KeyGenerator.getInstance("Blowfish");
        gen.init(192, new SecureRandom());
        SecretKey key = gen.generateKey();

        return new String(new Base64().encode(key.getEncoded())).trim();
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        throw new GeneralSecurityException(e.getMessage(), e);
    }
}

From source file:com.github.woki.payments.adyen.action.CSEUtil.java

private static SecretKey aesKey(int keySize) throws NoSuchAlgorithmException {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(keySize);//from   w  ww  .ja va  2s.  c  o  m
    return kgen.generateKey();
}