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:org.craftercms.commons.crypto.CipherUtils.java

/**
 * Generates a random encryption key.//from w ww .  ja v a2 s .c  o m
 *
 * @param cipherAlgorithm the cipher algorithm the key will be used with. Will determine the key size
 * @return the generated key
 */
public static SecretKey generateKey(String cipherAlgorithm) throws NoSuchAlgorithmException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance(cipherAlgorithm);
    keyGenerator.init(CryptoUtils.secureRandom);

    return keyGenerator.generateKey();
}

From source file:pl.kotcrab.crypto.CryptoUtils.java

/** Generates random AES key
 * @return random AES key *///from  w w  w . j a v a2  s  .co  m
public static SecretKey getAESRandomKey() {
    try {
        KeyGenerator keyGen = KeyGenerator.getInstance("AES", "BC");
        keyGen.init(256);
        return keyGen.generateKey();
    } catch (NoSuchAlgorithmException | NoSuchProviderException e) {
        e.printStackTrace();
    }

    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", "Crypto");
    sr.setSeed(seed);/* w  w  w. j a  v a 2  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:org.craftercms.commons.crypto.CryptoUtils.java

/**
 * Generates a random encryption key./* ww w.  j av a 2 s.  c  om*/
 *
 * @param cipherAlgorithm the cipher algorithm the key will be used with. Will determine the key size
 * @return the generated key
 */
public static SecretKey generateKey(String cipherAlgorithm) throws NoSuchAlgorithmException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance(cipherAlgorithm);
    keyGenerator.init(secureRandom);

    return keyGenerator.generateKey();
}

From source file:org.bigmouth.nvwa.utils.degist.NativeAesUtils.java

public static byte[] encrypt(String input, String key, byte[] iv) throws Exception {
    javax.crypto.KeyGenerator kgen = javax.crypto.KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(key.getBytes()));
    SecretKey secretKey = kgen.generateKey();
    byte[] enCodeFormat = secretKey.getEncoded();
    SecretKeySpec skey = new SecretKeySpec(enCodeFormat, "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, skey, new IvParameterSpec(INIT_VECTOR, 0, INIT_VECTOR.length));
    return cipher.doFinal(input.getBytes());
}

From source file:org.bigmouth.nvwa.utils.degist.NativeAesUtils.java

public static String encrypt(String input, String key) throws Exception {
    byte[] crypted = null;
    javax.crypto.KeyGenerator kgen = javax.crypto.KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(key.getBytes()));
    SecretKey secretKey = kgen.generateKey();
    byte[] enCodeFormat = secretKey.getEncoded();
    SecretKeySpec skey = new SecretKeySpec(enCodeFormat, "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, skey, new IvParameterSpec(INIT_VECTOR, 0, INIT_VECTOR.length));
    crypted = cipher.doFinal(input.getBytes());
    return new String(Hex.encode(crypted));
}

From source file:org.bigmouth.nvwa.utils.degist.NativeAesUtils.java

public static String decrypt(String input, String key, byte[] iv) throws Exception {
    byte[] output = null;
    javax.crypto.KeyGenerator kgen = javax.crypto.KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(key.getBytes()));
    SecretKey secretKey = kgen.generateKey();
    byte[] enCodeFormat = secretKey.getEncoded();
    SecretKeySpec skey = new SecretKeySpec(enCodeFormat, "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, skey, new IvParameterSpec(iv, 0, iv.length));
    output = cipher.doFinal(Hex.decode(input));
    return new String(output);
}

From source file:org.demo.show.providers.ThreeDes2.java

/**
 * //from   w  w  w . j ava2  s. c o  m
 * ?
 * 
 * @return byte[] 
 * */
public static byte[] initkey() throws Exception {

    // ?
    KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);
    // ??
    kg.init(168);
    // ?
    SecretKey secretKey = kg.generateKey();
    // ???
    return secretKey.getEncoded();
}

From source file:com.drisoftie.cwdroid.util.CredentialUtils.java

private static SecretKey generateKey() throws NoSuchAlgorithmException {
    // Generate a 256-bit key
    final int outputKeyLength = 256;

    SecureRandom secureRandom = new SecureRandom();
    // Do *not* seed secureRandom! Automatically seeded from system entropy.
    KeyGenerator keyGenerator = KeyGenerator.getInstance(AES);
    keyGenerator.init(outputKeyLength, secureRandom);
    return keyGenerator.generateKey();
}

From source file:org.atricore.idbus.kernel.main.authn.util.CipherUtil.java

/**
 * This generates a 128 AES key./*  ww w. j av  a2s  .c  o  m*/
 *
 * @throws NoSuchAlgorithmException
 */
public static SecretKeySpec generateAESKey() throws NoSuchAlgorithmException {

    SecretKeySpec skeySpec;

    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128);
    SecretKey skey = kgen.generateKey();
    byte[] key = skey.getEncoded();

    skeySpec = new SecretKeySpec(key, "AES");

    return skeySpec;
}