# Einfaches OAuth2 mit Password und Bearer { #simple-oauth2-with-password-and-bearer }

Lassen Sie uns nun auf dem vorherigen Kapitel aufbauen und die fehlenden Teile hinzufügen, um einen vollständigen Sicherheits-Flow zu erhalten.

## `username` und `password` entgegennehmen { #get-the-username-and-password }

Wir werden **FastAPIs** Sicherheits-Werkzeuge verwenden, um den `username` und das `password` entgegenzunehmen.

        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();

        }
    }

    // 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());
    }

                "msg": "String should match pattern '^password$'",
                "input": grant_type,
                "ctx": {"pattern": "^password$"},
            }
        ]
    }


def test_strict_login_correct_data():
    response = client.post(
        "/login",
        data={"username": "johndoe", "password": "secret", "grant_type": "password"},
    )
    assert response.status_code == 200

     * 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;
        }

# 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`.

    }

    /**
     * Returns the password.
     * @return The password.
     */
    public String getPassword() {
        return password;
    }

    /**
     * Sets the password.
     * @param password The password.
     */
    public void setPassword(final String password) {
        this.password = password;
    }

    /**
     * Returns the domain.

                    "properties": {
                        "username": {"type": "string", "title": "Username"},
                        "password": {"type": "string", "title": "Password"},
                    },
                    "type": "object",
                    "required": ["username", "password"],
                    "title": "FormData",
                },
                "ValidationError": {

class OAuth2PasswordRequestForm:
    """
    This is a dependency class to collect the `username` and `password` as form data
    for an OAuth2 password flow.

    The OAuth2 specification dictates that for a password flow the data should be
    collected using form data (instead of JSON) and that it should have the specific
    fields `username` and `password`.

    All the initialization parameters are extracted from the request.