private static byte[] hash(char[] pin, byte[] salt)
throws NoSuchAlgorithmException, InvalidKeySpecException {
PBEKeySpec spec = new PBEKeySpec(pin, salt, ROUNDS, KEY_LEN);
Arrays.fill(pin, Character.MIN_VALUE);
try {
SecretKeyFactory skf = SecretKeyFactory.getInstance(KEY_ALGORITHM);
return skf.generateSecret(spec).getEncoded();
} finally {
spec.clearPassword();
}
}
/**
* Used to combine the users password and the given salt to encrypt the users information
*
* @param inPassword The user defined password
* @param inSalt The salt that has been randomly generated
* @return Returns the users password in its hashed form
* @throws Exception
*/
public static byte[] hash(String inPassword, byte[] inSalt) throws Exception {
// Link all the elements together to form a key
PBEKeySpec spec = new PBEKeySpec(inPassword.toCharArray(), inSalt, 1000, 16);
try {
// Generate the secret key
SecretKeyFactory skf = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
return skf.generateSecret(spec).getEncoded();
} catch (Exception e) {
System.out.println(e.toString());
throw new Exception("broken hash system");
} finally {
spec.clearPassword();
}
}