Spring OAuth2 Server is not responding with refresh token after authorization code flow

Question

I have setup an OAuth2 auth server with the main purpose of using an authorization code flow. From what I can gather, the flow is working as I'm able to get a valid access_token at the end of the flow but the problem is I'm not getting a request_token response field. I'm not sure if I'm meant to do something differently to what I've done, but I believe all I had to do to get this was to add "request_token" in the authorizedGrantTypes parameters (which I have done). I will most the relevant setup code below.

AuthorizationServerConfigurerAdapter

@Import(AuthorizationServerEndpointsConfiguration.class)
@Configuration
public class AuthorizationServerConfig extends AuthorizationServerConfigurerAdapter {

    PasswordEncoder passwordEncoder;
    AuthenticationManager authenticationManager;
    KeyPair keyPair;
    RedisConnectionFactory redisConnectionFactory;

    public AuthorizationServerConfig(AuthenticationManager authenticationManager, KeyPair keyPair, RedisConnectionFactory redisConnectionFactory,
                                     PasswordEncoder passwordEncoder) {
        this.keyPair = keyPair;
        this.redisConnectionFactory = redisConnectionFactory;
        this.authenticationManager = authenticationManager;
        this.passwordEncoder = passwordEncoder;
    }

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients
                .inMemory()
                    .withClient("web")
                    .secret(passwordEncoder.encode("noonewilleverguess"))
                    .scopes("resource:read", "resource:write")
                    .authorizedGrantTypes("authorization_code", "refresh_token")
                    .redirectUris("http://localhost:8080/login-two");
    }

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints
                .authenticationManager(authenticationManager)
                .tokenStore(tokenStore(redisConnectionFactory))
                .accessTokenConverter(accessTokenConverter());
    }

    @Bean
    public TokenStore tokenStore(RedisConnectionFactory redisConnectionFactory) {
        return new RedisTokenStore(redisConnectionFactory);
    }

    @Bean
    public JwtAccessTokenConverter accessTokenConverter() {
        JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
        converter.setKeyPair(this.keyPair);
        return converter;
    }
}

AuthorizationServerSecurityConfiguration

@Configuration
public class JwtSetEndpointConfiguration extends AuthorizationServerSecurityConfiguration {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        super.configure(http);

        http
                .requestMatchers()
                    .mvcMatchers("/.well-known/jwks.json")
                    .and()
                .authorizeRequests()
                    .mvcMatchers("/.well-known/jwks.json").permitAll();
    }


}

WebSecurityConfigurerAdapter

@EnableWebSecurity
@Configuration
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Bean
    @Override
    protected UserDetailsService userDetailsService() {
        return new UserDetailsServiceImpl();
    }

    @Bean
    public KeyPair keyPairBean() throws NoSuchAlgorithmException {
        //TODO:drt - probs change
        KeyPairGenerator gen = KeyPairGenerator.getInstance("RSA");
        gen.initialize(2048);
        return gen.generateKeyPair();
    }

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService()).passwordEncoder(passwordEncoder());
    }

    @Bean
    PasswordEncoder passwordEncoder() {
        return PasswordEncoderFactories.createDelegatingPasswordEncoder();
    }
}

The authorization code flow response

I first send a GET request to:

http://localhost:8080/oauth/authorize?response_type=code&client_id=web&state=8781487s1

Example Redirection: http://localhost:8080/login-two?code=N-U9XJ&state=8781487s1

So then I send a POST request to http://localhost:8080/oauth/token with Basic Auth

This is the example response I'm receiving, with no refresh_token field :

{
    "access_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2MTc2MjY1NzQsInVzZXJfbmFtZSI6ImFkbWluIiwiYXV0aG9yaXRpZXMiOlsiUk9MRV9VU0VSIl0sImp0aSI6ImRENUplcWI3QlhHTkd0WkI1QVU4akhNbGR1YyIsImNsaWVudF9pZCI6IndlYiIsInNjb3BlIjpbInJlc291cmNlOndyaXRlIiwicmVzb3VyY2U6cmVhZCJdfQ.D5XKotYYAZkKtZNWdD-wirtoi3prU3CCmibIiQF5kodbXeK5ETdZ5k8CgSBLd7Aq-XEdhYXUEbtzzI0vf1vHf_MyhPFy_owldm_JJf2-2z9jNoU2BSnGMp6TCM00pCSMwbk57paLRZouryHEhTdvixVDmez2e1KmMVmXP6NypARB3Sp5SD2sZ2JN7FBQdkQ0OMVChjAQMTy1M3mDiT5dpT7iD7JxKRFTmD7qKYSF_gbQi6mEF3oH4j40TGI_CpyP3kKdDh4kiEfNeFd84YNHGYZACsYHfjoJrtJV1ECoeLph5CpmSpzt0lhOlzy8Q98OsPR8SdRt5Ou9N-BFmftZDw",
    "token_type": "bearer",
    "expires_in": 13462,
    "scope": "resource:write resource:read",
    "jti": "dD5Jeqb7BXGNGtZB5AU8jHMlduc"
}

Hopefully one of you guys can help, as at this point after trying things out and looking up online I've no idea what I'm doing wrong. Please help,

Answer 1

So I managed to fix this so it now returns a refresh token after the authorization flow. All I had to do was add the DefaultTokenServices bean and make sure to setSupportRefreshToken to true.

@Bean
    @Primary
    public DefaultTokenServices tokenServices() {
        DefaultTokenServices defaultTokenServices = new DefaultTokenServices();
        defaultTokenServices.setTokenStore(tokenStore());
        defaultTokenServices.setSupportRefreshToken(true);
        return defaultTokenServices;
    }