java - Spring Security - 405 Request Method 'POST' Not Supported

Question

I have implemented Spring Security to my project, but I am getting status 405 when I try to log in. I have already added csrf token in the form.

This is the error I am getting when I send username and password: HTTP Status 405 - Request method 'POST' not supported

Spring version: 4.0.2.RELEASED

<div class="login-form">
    <c:url var="loginUrl" value="/login" />
    <form action="${loginUrl}" method="post" class="form-horizontal">
        <c:if test="${param.error != null}">
            <div class="alert alert-danger">
                <p>Invalid username and password.</p>
            </div>
        </c:if>
        <c:if test="${param.logout != null}">
            <div class="alert alert-success">
                <p>You have been logged out successfully.</p>
            </div>
        </c:if>
        <div class="input-group input-sm">
            <label class="input-group-addon" for="username">
                <i class="fa fa-user"></i>
            </label>
            <input type="text" class="form-control" id="username"
                name="clientusername" placeholder="Enter Username" required>
        </div>
        <div class="input-group input-sm">
            <label class="input-group-addon" for="password">
                <i class="fa fa-lock"></i>
            </label>
            <input type="password" class="form-control" id="password"
                name="clientpassword" placeholder="Enter Password" required>
        </div>

        <input type="hidden" name="${_csrf.parameterName}"
            value="${_csrf.token}" />

        <div class="form-actions">
            <input type="submit" class="btn btn-block btn-primary btn-default"
                value="Log in">
        </div>
    </form>
</div>

Security Configuration:

@Configuration
@EnableWebSecurity
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Autowired
    @Qualifier("G2BUserDetailsService")
    UserDetailsService userDetailsService;

    @Autowired
    public void configureGlobalSecurity(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
      http.authorizeRequests()
        .antMatchers("/", "/home").permitAll()
        .antMatchers("/admin/**").access("hasRole('ADMIN')")
        .and().formLogin().loginPage("/login")
        .usernameParameter("clientusername").passwordParameter("clientpassword")
        .and().csrf()
        .and().exceptionHandling().accessDeniedPage("/Access_Denied");
//        .and().csrf().disable();
    }

Controller:

@RequestMapping(value = "/login", method = RequestMethod.GET)
public ModelAndView loginPage() {
    return new ModelAndView("login");
}

@RequestMapping(value="/logout", method = RequestMethod.GET)
public String logoutPage (HttpServletRequest request, HttpServletResponse response) {
    Authentication auth = SecurityContextHolder.getContext().getAuthentication();
    if (auth != null){    
        new SecurityContextLogoutHandler().logout(request, response, auth);
    }
    return "redirect:/login?logout";
}

 @RequestMapping(value = "/Access_Denied", method = RequestMethod.GET)
    public ModelAndView accessDeniedPage(ModelMap model) {
        model.addAttribute("user", getPrincipal());
        return new ModelAndView("accessDenied");
    }

 @RequestMapping(value = "/admin", method = RequestMethod.GET)
    public ModelAndView adminPage(ModelMap model) {
        model.addAttribute("user", getPrincipal());
        return new ModelAndView("admin");
    }

 private String getPrincipal(){
        String userName = null;
        Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();

        if (principal instanceof UserDetails) {
            userName = ((UserDetails)principal).getUsername();
        } else {
            userName = principal.toString();
        }
        return userName;
    }

Almost every topic about this issue says that we need to add csrf token, but I already added. Am I missing something?

Answer 1

First of all csrf is enabled by default in Spring as of Spring 4.0 so there no need to explicitly enable it yourself.

Secondly, there is no endpoint for you to authenticate your login. What you're doing is sending a request to /login which only takes a GET request. You could create another controller method to receive that POST request and authenticate or you could use a UserDetailsService.

SecurityConfiguration

protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()
                    .antMatchers("/login-form")
                        .anonymous()
                    .and()
                .formLogin()
                    .loginPage("/user-login") 
                    .defaultSuccessUrl("/admin", true) // the second parameter is for enforcing this url always
                    .loginProcessingUrl("/login")
                    .failureUrl("/user-login")
                    .permitAll();
}

@Autowired 
private UserDetailsService userDetailsService;  

@Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
    BCryptPasswordEncoder pe = new  BCryptPasswordEncoder();
    auth.userDetailsService(userDetailsService).passwordEncoder(pe);
}

Here our view page is /user-login and the processing url is /login this means in your controller you need remove the mapping for /login and add the following:

Controller

@RequestMapping(value="/user-login", method=RequestMethod.GET)
public ModelAndView loginForm() {
    return new ModelAndView("login-form");
}

And change your view.

View (login-form.jsp)

<c:url value="/login" var="loginUrl"/>
<form action="${loginUrl}" method="post" modelAttribute="user">
    Username: <input type="text" id="username" name="username" placeholder=""><br>
    Password: <input type="password" id="password" name="password" placeholder=""><br>

    <input type="hidden"
    name="${_csrf.parameterName}"
    value="${_csrf.token}"/>
    <button type="submit">Login</button>
</form>