How to configure Spring Security to allow Swagger URL to be accessed without authentication

Question

My project has Spring Security. Main issue: Not able to access swagger URL at http://localhost:8080/api/v2/api-docs. It says Missing or invalid Authorization header.

Screenshot of the browser window My pom.xml has the following entries

<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.4.0</version>
</dependency>

<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.4.0</version>
</dependency>

SwaggerConfig :

@Configuration
@EnableSwagger2
public class SwaggerConfig {

@Bean
public Docket api() {
    return new Docket(DocumentationType.SWAGGER_2).select()
            .apis(RequestHandlerSelectors.any())
            .paths(PathSelectors.any())
            .build()
            .apiInfo(apiInfo());
}

private ApiInfo apiInfo() {
    ApiInfo apiInfo = new ApiInfo("My REST API", "Some custom description of API.", "API TOS", "Terms of service", "myeaddress@company.com", "License of API", "API license URL");
    return apiInfo;
}

AppConfig:

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = { "com.musigma.esp2" })
@Import(SwaggerConfig.class)
public class AppConfig extends WebMvcConfigurerAdapter {

// ========= Overrides ===========

@Override
public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(new LocaleChangeInterceptor());
}

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("swagger-ui.html")
      .addResourceLocations("classpath:/META-INF/resources/");

    registry.addResourceHandler("/webjars/**")
      .addResourceLocations("classpath:/META-INF/resources/webjars/");
}

web.xml entries:

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        com.musigma.esp2.configuration.AppConfig
        com.musigma.esp2.configuration.WebSecurityConfiguration
        com.musigma.esp2.configuration.PersistenceConfig
        com.musigma.esp2.configuration.ACLConfig
        com.musigma.esp2.configuration.SwaggerConfig
    </param-value>
</context-param>

WebSecurityConfig:

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
@ComponentScan(basePackages = { "com.musigma.esp2.service", "com.musigma.esp2.security" })
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
@Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
        .csrf()
            .disable()
        .exceptionHandling()
            .authenticationEntryPoint(this.unauthorizedHandler)
            .and()
        .sessionManagement()
            .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
            .and()
        .authorizeRequests()
            .antMatchers("/auth/login", "/auth/logout").permitAll()
            .antMatchers("/api/**").authenticated()
            .anyRequest().authenticated();

        // custom JSON based authentication by POST of {"username":"<name>","password":"<password>"} which sets the token header upon authentication
        httpSecurity.addFilterBefore(loginFilter(), UsernamePasswordAuthenticationFilter.class);

        // custom Token based authentication based on the header previously given to the client
        httpSecurity.addFilterBefore(new StatelessTokenAuthenticationFilter(tokenAuthenticationService), UsernamePasswordAuthenticationFilter.class);
    }
}

Answer 1

Adding this to your WebSecurityConfiguration class should do the trick.

@Configuration
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/v2/api-docs",
                                   "/configuration/ui",
                                   "/swagger-resources/**",
                                   "/configuration/security",
                                   "/swagger-ui.html",
                                   "/webjars/**");
    }

}

Answer 2

I had the same problem using Spring Boot 2.0.0.M7 + Spring Security + Springfox 2.8.0. And I solved the problem using the following security configuration that allows public access to Swagger UI resources.

Answer updated in January 2021 : support Springfox 3

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    private static final String[] AUTH_WHITELIST = {
            // -- Swagger UI v2
            "/v2/api-docs",
            "/swagger-resources",
            "/swagger-resources/**",
            "/configuration/ui",
            "/configuration/security",
            "/swagger-ui.html",
            "/webjars/**",
            // -- Swagger UI v3 (OpenAPI)
            "/v3/api-docs/**",
            "/swagger-ui/**"
            // other public endpoints of your API may be appended to this array
    };


    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.
                // ... here goes your custom security configuration
                authorizeRequests().
                antMatchers(AUTH_WHITELIST).permitAll().  // whitelist Swagger UI resources
                // ... here goes your custom security configuration
                antMatchers("/**").authenticated();  // require authentication for any endpoint that's not whitelisted
    }

}

Answer 3

I updated with /configuration/** and /swagger-resources/** and it worked for me.

@Override
public void configure(WebSecurity web) throws Exception {
    web.ignoring().antMatchers("/v2/api-docs", "/configuration/ui", "/swagger-resources/**", "/configuration/**", "/swagger-ui.html", "/webjars/**");

}

Answer 4

For those who using a newer swagger 3 version org.springdoc:springdoc-openapi-ui

@Configuration
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/v3/api-docs/**", "/swagger-ui.html", "/swagger-ui/**");
    }
}

Answer 5

if your springfox version higher than 2.5， should be add WebSecurityConfiguration as below:

@Override
public void configure(HttpSecurity http) throws Exception {
    // TODO Auto-generated method stub
    http.authorizeRequests()
        .antMatchers("/v2/api-docs", "/swagger-resources/configuration/ui", "/swagger-resources", "/swagger-resources/configuration/security", "/swagger-ui.html", "/webjars/**").permitAll()
        .and()
        .authorizeRequests()
        .anyRequest()
        .authenticated()
        .and()
        .csrf().disable();
}

Answer 6

Some security config and you are ready with swagger open to all

For Swagger V2

@Configuration
@EnableWebSecurity
public class CabSecurityConfig extends WebSecurityConfigurerAdapter {


    private static final String[] AUTH_WHITELIST = {
            // -- swagger ui
            "/v2/api-docs", 
            "/swagger-resources/**", 
            "/configuration/ui",
            "/configuration/security", 
            "/swagger-ui.html",
            "/webjars/**"
    };

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

        // ... here goes your custom security configuration
        http.authorizeRequests().
        antMatchers(AUTH_WHITELIST).permitAll(). // whitelist URL permitted
        antMatchers("/**").authenticated(); // others need auth
    }

}

For Swagger V3

@Configuration
@EnableWebSecurity
public class CabSecurityConfig extends WebSecurityConfigurerAdapter {


    private static final String[] AUTH_WHITELIST = {
            // -- swagger ui
            "/v2/api-docs",
            "/v3/api-docs",  
            "/swagger-resources/**", 
            "/swagger-ui/**",
             };

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

        // ... here goes your custom security configuration
        http.authorizeRequests().
        antMatchers(AUTH_WHITELIST).permitAll(). // whitelist URL permitted
        antMatchers("/**").authenticated(); // others need auth
    }

}

Answer 7

More or less this page has answers but all are not at one place. I was dealing with the same issue and spent quite a good time on it. Now i have a better understanding and i would like to share it here:

I Enabling Swagger ui with Spring websecurity:

If you have enabled Spring Websecurity by default it will block all the requests to your application and returns 401. However for the swagger ui to load in the browser swagger-ui.html makes several calls to collect data. The best way to debug is open swagger-ui.html in a browser(like google chrome) and use developer options('F12' key ). You can see several calls made when the page loads and if the swagger-ui is not loading completely probably some of them are failing.

you may need to tell Spring websecurity to ignore authentication for several swagger path patterns. I am using swagger-ui 2.9.2 and in my case below are the patterns that i had to ignore:

However if you are using a different version your's might change. you may have to figure out yours with developer option in your browser as i said before.

@Configuration
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
@Override
public void configure(WebSecurity web) throws Exception {
    web.ignoring().antMatchers("/v2/api-docs", "/configuration/ui", 
            "/swagger-resources/**", "/configuration/**", "/swagger-ui.html"
            , "/webjars/**", "/csrf", "/");
}
}

II Enabling swagger ui with interceptor

Generally you may not want to intercept requests that are made by swagger-ui.html. To exclude several patterns of swagger below is the code:

Most of the cases pattern for web security and interceptor will be same.

@Configuration
@EnableWebMvc
public class RetrieveCiamInterceptorConfiguration implements WebMvcConfigurer {

@Autowired
RetrieveInterceptor validationInterceptor;

@Override
public void addInterceptors(InterceptorRegistry registry) {

    registry.addInterceptor(validationInterceptor).addPathPatterns("/**")
    .excludePathPatterns("/v2/api-docs", "/configuration/ui", 
            "/swagger-resources/**", "/configuration/**", "/swagger-ui.html"
            , "/webjars/**", "/csrf", "/");
}

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("swagger-ui.html")
      .addResourceLocations("classpath:/META-INF/resources/");

    registry.addResourceHandler("/webjars/**")
      .addResourceLocations("classpath:/META-INF/resources/webjars/");
}

}

Since you may have to enable @EnableWebMvc to add interceptors you may also have to add resource handlers to swagger similar to i have done in the above code snippet.

Answer 8

Limiting only to Swagger related resources:

.antMatchers("/v2/api-docs", "/swagger-resources/**", "/swagger-ui.html", "/webjars/springfox-swagger-ui/**");

Answer 9

Here's a complete solution for Swagger with Spring Security. We probably want to only enable Swagger in our development and QA environment and disable it in the production environment. So, I am using a property (prop.swagger.enabled) as a flag to bypass spring security authentication for swagger-ui only in development/qa environment.

@Configuration
@EnableSwagger2
public class SwaggerConfiguration extends WebSecurityConfigurerAdapter implements WebMvcConfigurer {

@Value("${prop.swagger.enabled:false}")
private boolean enableSwagger;

@Bean
public Docket SwaggerConfig() {
    return new Docket(DocumentationType.SWAGGER_2)
            .enable(enableSwagger)
            .select()
            .apis(RequestHandlerSelectors.basePackage("com.your.controller"))
            .paths(PathSelectors.any())
            .build();
}

@Override
public void configure(WebSecurity web) throws Exception {
    if (enableSwagger)  
        web.ignoring().antMatchers("/v2/api-docs",
                               "/configuration/ui",
                               "/swagger-resources/**",
                               "/configuration/security",
                               "/swagger-ui.html",
                               "/webjars/**");
}

@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
    if (enableSwagger) {
        registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
    }
  }
}

Answer 10

If you use Spring Boot 3, you need to use: springdoc-openapi-starter-webmvc-ui as it is writen in the doc introduction.

And use security configuration, something like this:

@Configuration
@EnableWebSecurity
@EnableMethodSecurity(securedEnabled = true, prePostEnabled = true, jsr250Enabled = true)
@RequiredArgsConstructor
public class SecurityConfiguration {

   @Bean
   public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
       return http
               .csrf().disable()
               .authorizeHttpRequests(a -> a
                       .requestMatchers("/v3/**", "/swagger-ui/**").permitAll()
                       .anyRequest().authenticated()
               ).build();
   }
}

• Swagger UI: http://{your host}:{your port}/swagger-ui/index.html
• JSON: http://{your host}:{your port}/v3/api-docs
• yaml: http://{your host}:{your port}/v3/api-docs.yaml

Answer 11

For Spring Security without the WebSecurityConfigurerAdapter it looks like (springdoc-openapi):

@Bean
public WebSecurityCustomizer webSecurityCustomizer() {
    return web -> web.ignoring().requestMatchers("/v3/api-docs/**", "/swagger-ui.html", "/swagger-ui/**");
}

See Configuring WebSecurity

Answer 12

Considering all of your API requests located with a url pattern of /api/.. you can tell spring to secure only this url pattern by using below configuration. Which means that you are telling spring what to secure instead of what to ignore.

@Override
protected void configure(HttpSecurity http) throws Exception {
  http
    .csrf().disable()
     .authorizeRequests()
      .antMatchers("/api/**").authenticated()
      .anyRequest().permitAll()
      .and()
    .httpBasic().and()
    .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
}

Answer 13

I am using Spring Boot 5. I have this controller that I want an unauthenticated user to invoke.

  //Builds a form to send to devices   
@RequestMapping(value = "/{id}/ViewFormit", method = RequestMethod.GET)
@ResponseBody
String doFormIT(@PathVariable String id) {
    try
    {
        //Get a list of forms applicable to the current user
        FormService parent = new FormService();

Here is what i did in the configuuration.

  @Override
   protected void configure(HttpSecurity http) throws Exception {
    http
            .authorizeRequests()
            .antMatchers(
                    "/registration**",
                    "/{^[\\\\d]$}/ViewFormit",

Hope this helps....

Answer 14

Just for enabling Swagger with Spring boot 2.5.4 and Springfox Swagger2:3.0.0 the following changes were sufficient for me:- .authorizeRequests().antMatchers("/v2/api-docs", "/swagger-resources/**", "/swagger-ui/**").permitAll().and()

Thanks to everyone for their suggestions in this thread!

Answer 15

Add a Bean like this:

@Bean
public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
http.authorizeExchange()
    .pathMatchers(
        "/v2/api-docs",
        "/swagger-ui/**",
        "/swagger-resources/**",
        "/*/swagger-resources/**",
        "/*/v2/api-docs")
    .permitAll()
    .and()
    .authorizeExchange()
    .anyExchange()
    .permitAll();
http.httpBasic().disable();
http.csrf().disable();
return http.build();
}