SHA2 password hashing in java

Question

I\'m trying to hash some passwords with SHA2.

Where can I get a snippet of java code for make that?

I have seen that post but I have something missing: SHA2

Answer 1

I modified a little rossum's code, added salt and convert returning type to String, add try/catch, maybe it will help to someone:

    public String hash(String password) {
    try {
        MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
        String salt = "some_random_salt";
        String passWithSalt = password + salt;
        byte[] passBytes = passWithSalt.getBytes();
        byte[] passHash = sha256.digest(passBytes);             
        StringBuilder sb = new StringBuilder();
        for(int i=0; i< passHash.length ;i++) {
            sb.append(Integer.toString((passHash[i] & 0xff) + 0x100, 16).substring(1));         
        }
        String generatedPassword = sb.toString();
        return generatedPassword;
    } catch (NoSuchAlgorithmException e) { e.printStackTrace(); }       
    return null;
}