Allow OPTIONS HTTP Method for oauth/token request

Question

I'm trying to enable oauth2 token fetching for my angular application. My configuration is working fine (authentication is working correctly for all requests, token fetching is working fine as well) but there is one problem.

CORS requests require that before GET an OPTIONS request is sent to the server. To make it worse, that request does not contain any authentication headers. I would like to have this request always returning with 200 status without any authentication done on the server. Is it possible? Maybe I'm missing something

my spring security config:

@Configuration
@EnableWebSecurity
@EnableAuthorizationServer
public class SecurityConfig extends WebSecurityConfigurerAdapter {

private static final Logger log = LoggerFactory.getLogger(SecurityConfig.class);

@Inject
private UserService userService;

@Bean
public TokenStore tokenStore() {
    return new InMemoryTokenStore();
}

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

@Bean
public WebResponseExceptionTranslator webResponseExceptionTranslator() {
    return new DefaultWebResponseExceptionTranslator() {

        @Override
        public ResponseEntity<OAuth2Exception> translate(Exception e) throws Exception {
            ResponseEntity<OAuth2Exception> responseEntity = super.translate(e);
            OAuth2Exception body = responseEntity.getBody();
            HttpHeaders headers = new HttpHeaders();
            headers.setAll(responseEntity.getHeaders().toSingleValueMap());
            headers.set("Access-Control-Allow-Origin", "*");
            headers.set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT");
            headers.set("Access-Control-Max-Age", "3600");
            headers.set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
            return new ResponseEntity<>(body, headers, responseEntity.getStatusCode());
        }

    };
}

@Bean
public AuthorizationServerConfigurer authorizationServerConfigurer() {
    return new AuthorizationServerConfigurer() {

        @Override
        public void configure(AuthorizationServerSecurityConfigurer security) throws Exception {
            OAuth2AuthenticationEntryPoint oAuth2AuthenticationEntryPoint = new OAuth2AuthenticationEntryPoint();
            oAuth2AuthenticationEntryPoint.setExceptionTranslator(webResponseExceptionTranslator());
            security.authenticationEntryPoint(oAuth2AuthenticationEntryPoint);
        }

        @Override
        public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
            clients.inMemory()
                    .withClient("secret-client")
                    .secret("secret")
                    .authorizedGrantTypes("password", "authorization_code", "refresh_token", "implicit")
                    .authorities("ROLE_LOGIN")
                    .scopes("read", "write", "trust")
                    .accessTokenValiditySeconds(60 * 60 * 12); // 12 hours
        }

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

@Override
protected AuthenticationManager authenticationManager() throws Exception {
    return new AuthenticationManager() {

        @Override
        public Authentication authenticate(Authentication authentication) throws AuthenticationException {
            log.warn("FIX ME: REMOVE AFTER DEBUG!!!!!!!!!!!!");                
            log.debug("authenticate: " + authentication.getPrincipal() + ":" + authentication.getCredentials());
            final Collection<GrantedAuthority> authorities = new ArrayList<>();
            WomarUser user = userService.findUser(authentication.getPrincipal().toString(), authentication.getCredentials().toString());
            for (UserRole userRole : user.getRoles()) {
                authorities.add(new SimpleGrantedAuthority(userRole.getName()));

            }
            return new UsernamePasswordAuthenticationToken(user.getLogin(), user.getPassword(), authorities);
        }

    };
}

@Bean
public OAuth2AuthenticationManager auth2AuthenticationManager() {
    OAuth2AuthenticationManager oAuth2AuthenticationManager = new OAuth2AuthenticationManager();
    oAuth2AuthenticationManager.setTokenServices(tokenServices());
    return oAuth2AuthenticationManager;
}

@Bean
public OAuth2AuthenticationProcessingFilter auth2AuthenticationProcessingFilter() throws Exception {
    OAuth2AuthenticationProcessingFilter oAuth2AuthenticationProcessingFilter = new OAuth2AuthenticationProcessingFilter();
    oAuth2AuthenticationProcessingFilter.setAuthenticationManager(auth2AuthenticationManager());
    return oAuth2AuthenticationProcessingFilter;
}

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

    OAuth2AuthenticationEntryPoint oAuth2AuthenticationEntryPoint = new OAuth2AuthenticationEntryPoint();
    oAuth2AuthenticationEntryPoint.setRealmName("realmName");
    oAuth2AuthenticationEntryPoint.setTypeName("Basic");
    oAuth2AuthenticationEntryPoint.setExceptionTranslator(webResponseExceptionTranslator());
    http
            .antMatcher("/**").httpBasic()
            .authenticationEntryPoint(oAuth2AuthenticationEntryPoint)
            .and().addFilterBefore(auth2AuthenticationProcessingFilter(), BasicAuthenticationFilter.class)
            .authorizeRequests()
            .antMatchers("/rest/womar/admin/**").hasRole("ADMIN")
            .antMatchers("/rest/womar/**").hasRole("USER");
}

}

angular request:

var config = {
params: {
    grant_type: 'password',
    username: login,
    password: password

},
headers: {
    Authorization: 'Basic ' + Base64.encode('secret-client' + ':' + 'secret')
}
};
$http.get("http://localhost:8080/oauth/token", config)
    .success(function(data, status) {
        $log.log('success');
        $log.log(data);
        $log.log(status);
    })
    .error(function(data, status) {
        $log.log('error');
        $log.log(data);
        $log.log(status);
    });

Answer 1

@EnableAuthorizationServer is adding http security configuration for endpoints like /oauth/token, /oauth/token_key etc at order 0. So what you should do is to define a http security rule for /oauth/token endpoint only for the OPTIONS http method which is at a higher order.

Something like this:

@Order(-1)
@Configuration
public class MyWebSecurity extends WebSecurityConfigurerAdapter {
   @Override
   protected void configure(HttpSecurity http) throws Exception {
       http
          .authorizeRequests()
          .antMatchers(HttpMethod.OPTIONS, "/oauth/token").permitAll()
   }
}

Answer 2

I was using the solution proposed by idursun. The OPTION call started to work, but still had problems with Access-Control-Allow-Origin.

This filter implementation definitively worked for me:

Standalone Spring OAuth2 JWT Authorization Server + CORS

Answer 3

The following works for Spring Boot 2. It does not pick up other CORS configurations otherwise.

@Configuration
@EnableAuthorizationServer
public class OAuth2AuthorizationServerConfig extends AuthorizationServerConfigurerAdapter {

    // this is a Spring ConfigurationProperty use any way to get the CORS values
    @Autowired
    private CorsProperties corsProperties;

    // other things
    //...

    @Override
    public void configure(
            AuthorizationServerEndpointsConfigurer endpoints) {
        endpoints
                .tokenStore(tokenStore())
                .authenticationManager(authenticationManager);
        if (corsProperties.getAllowedOrigins() != null) {
            Map<String, CorsConfiguration> corsConfigMap = new HashMap<>();
            Arrays.asList(corsProperties.getAllowedOrigins().split(",")).stream()
                    .filter(StringUtils::isNotBlank).forEach(s -> {
                CorsConfiguration config = new CorsConfiguration();
                config.setAllowCredentials(true);
                config.addAllowedOrigin(s.trim());
                if (corsProperties.getAllowedMethods() != null) {
                    config.setAllowedMethods(Arrays.asList(corsProperties.getAllowedMethods().split(",")));
                }
                if (corsProperties.getAllowedHeaders() != null) {
                    config.setAllowedHeaders(Arrays.asList(corsProperties.getAllowedHeaders().split(",")));
                }
                // here the /oauth/token is used
                corsConfigMap.put("/oauth/token", config);
            });
            endpoints.getFrameworkEndpointHandlerMapping()
                    .setCorsConfigurations(corsConfigMap);
        }
    }


}

And in addition the already mentioned allowance of the OPTIONS request:

@Order(-1)
@Configuration
public class MyWebSecurity extends WebSecurityConfigurerAdapter {
   @Override
   protected void configure(HttpSecurity http) throws Exception {
       http
          authorizeRequests()
            .antMatchers("/**/oauth/token").permitAll()
            .and().httpBasic().realmName(securityRealm)
            // would throw a 403 otherwise
            .and().csrf().disable()
            // optional, but with a token a sesion is not needed anymore
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
   }
}

Answer 4

I just add

@Order(Ordered.HIGHEST_PRECEDENCE)

in

public class OAuth2SecurityConfig extends WebSecurityConfigurerAdapter {....}

and config the support of spring

@Bean
public CorsConfigurationSource corsConfigurationSource() {
CorsConfiguration configuration = new CorsConfiguration();
configuration.setAllowedOrigins(Arrays.asList(""));
configuration.setAllowedMethods(Arrays.asList(""));
configuration.setAllowedHeaders(Arrays.asList("*"));
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", configuration);
return source;
}

Worked for me.

Answer 5

Same problem with Spring-Boot 1.4.7.RELEASE

My WebSecurityConfigurerAdapter was using SecurityProperties.ACCESS_OVERRIDE_ORDER so, selected answer did not work.

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
@Order(SecurityProperties.ACCESS_OVERRIDE_ORDER)
public class AuthServerSecurityConfig extends WebSecurityConfigurerAdapter 

Thus, I added the following filter configuration with preceding order:

  @Bean
  public FilterRegistrationBean corsFilter() {
    FilterRegistrationBean bean = new FilterRegistrationBean(new CorsFilter(corsConfigurationSource()));
    bean.setOrder(SecurityProperties.DEFAULT_FILTER_ORDER);
    return bean;
  }

  @Bean
  public CorsConfigurationSource corsConfigurationSource() {
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    CorsConfiguration config = new CorsConfiguration();
    config.setAllowCredentials(true);
    config.addAllowedOrigin("*");
    config.addAllowedHeader("*");
    config.addAllowedMethod("*");
    source.registerCorsConfiguration("/**", config);
    return source;
  }

and it got the job done.

Note: equivalent result can be achieved with a javax.servlet.Filter bean with @Order(SecurityProperties.DEFAULT_FILTER_ORDER) annotation as below:

@Component
@Order(SecurityProperties.DEFAULT_FILTER_ORDER)
public class CorsFilter implements Filter {

  @Override
  public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
    final HttpServletResponse response = (HttpServletResponse) res;

    response.setHeader("Access-Control-Allow-Origin"  , "*"                               );
    response.setHeader("Access-Control-Allow-Methods" , "POST, PUT, GET, OPTIONS, DELETE" );
    response.setHeader("Access-Control-Allow-Headers" , "Authorization, Content-Type"     );
    response.setHeader("Access-Control-Max-Age"       , "3600"                            );

    if("OPTIONS".equalsIgnoreCase(((HttpServletRequest) req).getMethod())) {
      response.setStatus(HttpServletResponse.SC_OK);
    }
    else {
      chain.doFilter(req, res);
    }
  }
  // ...
}