return hmac.digest();
    }

    /**
     * Generates the NT password hash for the given password.
     *
     * @param password the password to hash
     * @return nt password hash
     */
    public static byte[] getNTHash(final String password) {
        if (password == null) {
            throw new NullPointerException("Password parameter is required");
        }

        return ntResponse;
    }

    /**
     * Generates the NTOWFv1 hash for the given password.
     *
     * @param password the password to hash
     * @return the NTOWFv1 hash bytes
     */
    public static byte[] nTOWFv1(final String password) {
        if (password == null) {
            throw new RuntimeException("Password parameter is required");
        }
        try {
            final MD4 md4 = new MD4();

     * from memory.
     *
     * @return the password as a char array
     */
    public char[] getPasswordAsCharArray() {
        checkNotClosed();
        return this.password != null && this.password.length > 0 ? this.password.clone() : this.password == null ? null : new char[0];
    }

    /**
     * Securely wipes the password from memory
     */

        }
    }

    // Test constructor with domain, username, and password
    @Test
    void testConstructorWithDomainUsernamePassword() {
        NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication("DOMAIN", "user", "password");
        assertEquals("DOMAIN", auth.getDomain());
        assertEquals("user", auth.getUsername());
        assertEquals("password", auth.getPassword());
    }

# Simple OAuth2 with Password and Bearer { #simple-oauth2-with-password-and-bearer }

Now let's build from the previous chapter and add the missing parts to have a complete security flow.

## Get the `username` and `password` { #get-the-username-and-password }

We are going to use **FastAPI** security utilities to get the `username` and `password`.

     * the supplied password.
     *
     * @param type2 The Type-2 message.
     * @param password The password.
     * @return A <code>byte[]</code> containing the LanManager response.
     */
    public static byte[] getLMResponse(final Type2Message type2, final String password) {
        if (type2 == null || password == null) {
            return null;
        }

* The **input model** needs to be able to have a password.
* The **output model** should not have a password.
* The **database model** would probably need to have a hashed password.

/// danger

Never store user's plaintext passwords. Always store a "secure hash" that you can then verify.

If you don't know, you will learn what a "password hash" is in the [security chapters](security/simple-oauth2.md#password-hashing){.internal-link target=_blank}.

///

     * @param targetName
     *            SPN of the target system, optional
     * @param passwordHash
     *            The NT password hash, takes precedence over password (which is no longer required unless legacy LM
     *            authentication is needed)
     * @param password
     *            The password to use when constructing the response.
     * @param domain
     *            The domain in which the user has an account.

     * @param password the password to authenticate with
     */
    public NtlmPasswordAuthentication(final CIFSContext tc, final String domain, final String username, final String password) {
        super(domain != null ? domain : tc.getConfig().getDefaultDomain(),
                username != null ? username : tc.getConfig().getDefaultUsername() != null ? tc.getConfig().getDefaultUsername() : "GUEST",

///

## Password hashing { #password-hashing }

"Hashing" means converting some content (a password in this case) into a sequence of bytes (just a string) that looks like gibberish.

Whenever you pass exactly the same content (exactly the same password) you get exactly the same gibberish.

But you cannot convert from the gibberish back to the password.

### Why use password hashing { #why-use-password-hashing }