private static SecretKey generateSymmetricKey() throws Exception {
KeyGenerator generator = KeyGenerator.getInstance(KEY_ALGORITHM);
SecureRandom random = new SecureRandom();
generator.init(KEY_LENGTH_BITS, random);
logger.debug("Generate Key");
return generator.generateKey();
// return new SecretKeySpec(Hex.decodeHex("cb024600dce7148b8ddc5d6c111fbd85".toCharArray()),
// KEY_ALGORITHM);
}
public void generate_new_aes_key() {
try {
KeyGenerator localKeyGenerator = KeyGenerator.getInstance("AES");
localKeyGenerator.init(128, SecureRandom.getInstance("SHA1PRNG"));
// aes_key = Base64.encodeBase64String(localKeyGenerator.generateKey().getEncoded());
aes_key =
new String(Base64.encode(localKeyGenerator.generateKey().getEncoded(), Base64.DEFAULT));
} catch (NoSuchAlgorithmException localNoSuchAlgorithmException) {
System.out.println(localNoSuchAlgorithmException);
}
return;
}
/**
* Constructs a new QuickChipher with the given transformation and algorithm.
*
* @param transformation the transformation to be used to create the Cipher for this QuickCipher.
* @param algorithm the algorithm to be used to create the SecretKey for this QuickCipher.
* @throws NoSuchAlgorithmException if transformation is null, empty, in an invalid format, or if
* no Provider supports a CipherSpi implementation for the specified algorithm or if no
* Provider supports a KeyGeneratorSpi implementation for the specified algorithm.
* @throws NoSuchPaddingException if transformation contains a padding scheme that is not
* available.
*/
public QuickCipher(String transformation, String algorithm)
throws NoSuchAlgorithmException, NoSuchPaddingException {
this.algorithm = algorithm;
cipher = Cipher.getInstance(transformation);
key = KeyGenerator.getInstance(this.algorithm).generateKey();
}