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:Main.java

private static byte[] iv() {
    byte[] iv = null;
    try {//from  ww w. j a  va2  s .c om
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        SecretKey skey = kgen.generateKey();
        iv = skey.getEncoded();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return iv;
}

From source file:Main.java

private static byte[] getRawKey(byte[] paramArrayOfByte) throws Exception {
    KeyGenerator localKeyGenerator = KeyGenerator.getInstance("AES");
    SecureRandom localSecureRandom = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    localSecureRandom.setSeed(paramArrayOfByte);
    localKeyGenerator.init(128, localSecureRandom);
    return localKeyGenerator.generateKey().getEncoded();
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    sr.setSeed(seed);/*w  ww  . j ava2  s. c  o m*/
    kgen.init(256, 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", "Crypto");
    sr.setSeed(seed);/*from w  w  w. j av  a  2 s . c  om*/
    kgen.init(128, sr);
    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", "Crypto");
    sr.setSeed(seed);// w  w w.j a  va  2 s. c  o  m
    kgen.init(128, sr);
    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  . j a  v  a 2 s  . c  o  m
    kgen.init(128, sr);
    SecretKey sKey = kgen.generateKey();
    byte[] raw = sKey.getEncoded();

    return raw;
}

From source file:Main.java

public static byte[] initKey() throws NoSuchAlgorithmException {
    KeyGenerator keyGen = KeyGenerator.getInstance("AES");
    keyGen.init(256); //192 256
    SecretKey secretKey = keyGen.generateKey();
    return secretKey.getEncoded();
}

From source file:Main.java

public static SecretKey generateAesKey() {
    try {//  w  w  w  .  ja  v a 2  s  .  c o  m
        KeyGenerator kg = KeyGenerator.getInstance("AES");
        kg.init(KEY_LENGTH_AES);
        SecretKey key = kg.generateKey();

        return key;
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

private static Key newDesInstance(String strKey) {
    Key key = null;/*from   w  w  w . j  a  va2 s . co  m*/
    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

/**
 * do not work/* ww w  . j  a v a  2 s  .  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();
}