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:TripleDES.java

/** Generate a secret TripleDES encryption/decryption key */
public static SecretKey generateKey() throws NoSuchAlgorithmException {
    // Get a key generator for Triple DES (a.k.a DESede)
    KeyGenerator keygen = KeyGenerator.getInstance("DESede");
    // Use it to generate a key
    return keygen.generateKey();
}

From source file:Main.java

public static byte[] getRandomKey(byte[] seed) throws Exception {

    KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG"); //random
    sr.setSeed(seed);/*from   w  w  w  .  j  a v  a  2  s . c om*/
    kg.init(128, sr);
    SecretKey secretKey = kg.generateKey();
    return secretKey.getEncoded();
}

From source file:org.apache.abdera.security.util.KeyHelper.java

public static SecretKey generateSecretKey(String type, int size)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance(type);
    keyGenerator.init(size);/*from  w  w w.  j  a v a  2  s. com*/
    return keyGenerator.generateKey();
}

From source file:org.apache.abdera.security.util.KeyHelper.java

public static Key generateKey(String type) throws NoSuchAlgorithmException {
    KeyGenerator keygen = KeyGenerator.getInstance(type);
    keygen.init(new SecureRandom());
    return keygen.generateKey();
}

From source file:org.apache.xml.security.samples.encryption.Encrypter.java

private static SecretKey GenerateDataEncryptionKey() throws Exception {

    String jceAlgorithmName = "AES";
    KeyGenerator keyGenerator = KeyGenerator.getInstance(jceAlgorithmName);
    keyGenerator.init(128);//  ww w  . ja v  a  2s  .  c om
    return keyGenerator.generateKey();
}

From source file:org.apache.abdera.security.util.KeyHelper.java

public static SecretKey generateSecretKey(String type, int size, String provider)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance(type, provider);
    keyGenerator.init(size);//from   ww w.jav  a  2 s  .c  o m
    return keyGenerator.generateKey();
}

From source file:Main.java

public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(encryptKey.getBytes()));

    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));

    return cipher.doFinal(content.getBytes("utf-8"));
}

From source file:Main.java

public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(decryptKey.getBytes()));

    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));
    byte[] decryptBytes = cipher.doFinal(encryptBytes);

    return new String(decryptBytes);
}

From source file:de.taimos.dvalin.interconnect.model.MessageCryptoUtil.java

private static void generateKey() {
    try {/*from  w  w w. j  a v a  2s  . com*/
        final KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        final SecretKey skey = kgen.generateKey();
        System.out.println("Key: " + Hex.encodeHexString(skey.getEncoded()));
    } catch (final NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

/**
 * Generates a new symmetric key of a given type.
 * @param type Type of key to generate (algorithm).
 * @return Generated new SecretKey.//  ww  w  . j a  va 2s. co  m
 * @throws NoSuchAlgorithmException
 */
public static SecretKey generateSymmetricKey(String type) throws NoSuchAlgorithmException {
    int keySize = 192;
    /* SecureRandom seeded automatically */
    SecureRandom secureRandom = new SecureRandom();
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    //128, 192, 256
    /* This is the correct way to initialize the keygenerator */
    keyGenerator.init(keySize, secureRandom);
    SecretKey key = keyGenerator.generateKey();
    return key;
}