Example usage for javax.crypto KeyGenerator getInstance

Introduction

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

Prototype

public static final KeyGenerator getInstance(String algorithm) throws NoSuchAlgorithmException

Source Link

Document

Returns a KeyGenerator object that generates secret keys for the specified algorithm.

Usage

From source file:com.java.demo.DesDemo.java

public static void Init() {
    try {//from  ww w.ja  va 2  s  . co  m
        KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");
        keyGenerator.init(56);
        SecretKey secretKey = keyGenerator.generateKey();
        byte[] bytesKey = secretKey.getEncoded();

        DESKeySpec dESKeySpec = new DESKeySpec(bytesKey);
        SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");
        convertSecretKey = factory.generateSecret(dESKeySpec);

    } catch (Exception e) {
    }
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kGen = KeyGenerator.getInstance("AES");
    SecureRandom sr;/* www.j  a va 2 s  .c  o  m*/
    if (android.os.Build.VERSION.SDK_INT >= 17) {
        sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    } else {
        sr = SecureRandom.getInstance("SHA1PRNG");
    }
    sr.setSeed(seed);
    kGen.init(128, sr);
    SecretKey sKey = kGen.generateKey();
    return sKey.getEncoded();
}

From source file:Main.java

private static byte[] generateMacSecret() {
    try {/*from   w w w.j  a v a2  s  .  c om*/
        KeyGenerator generator = KeyGenerator.getInstance("HmacSHA1");
        return generator.generateKey().getEncoded();
    } catch (NoSuchAlgorithmException e) {
        Log.w("keyutil", e);
        return null;
    }
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    //  SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    sr.setSeed(seed);// www .  j a  v a 2 s .  c  o  m
    kgen.init(128, sr); // 192 and 256 bits may not be available
    SecretKey skey = kgen.generateKey();
    byte[] raw = skey.getEncoded();
    return raw;
}

From source file:Main.java

private static byte[] generateEncryptionSecret() {
    try {/*  w ww .  ja  v a2 s .c  om*/
        KeyGenerator generator = KeyGenerator.getInstance("AES");
        generator.init(128);

        SecretKey key = generator.generateKey();
        return key.getEncoded();
    } catch (NoSuchAlgorithmException ex) {
        Log.w("keyutil", ex);
        return null;
    }
}

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   ww  w. j  av  a  2 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:es.logongas.fpempresa.security.SecureKeyGenerator.java

public static String getSecureKey() {
    try {// w w w .j  a  v a2s .com
        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;/*from  w  w  w  . j a va2s. c o  m*/
    Key key;

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

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

From source file:com.healthcit.cacure.utils.PasswordService.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    sr.setSeed(seed);//from www  . j  av  a  2 s.co m
    kgen.init(128, sr); // 192 and 256 bits may not be available   
    SecretKey skey = kgen.generateKey();
    byte[] raw = skey.getEncoded();
    return raw;
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    sr.setSeed(seed);//ww w  .  java  2 s  .c om
    kgen.init(128, sr); // 192 and 256 bits may not be available
    SecretKey skey = kgen.generateKey();
    byte[] raw = skey.getEncoded();
    return raw;
}