java - 如何在Spring Security认证登录中获取用户输入的用户名和密码值

Question

我在我的应用程序中使用 Spring MVC，并且登录由 spring security 进行身份验证。我的 UserServiceImpl.java 类中有以下两个方法， public UserDetails loadUserByUsername(String userName) 抛出 UsernameNotFoundException、DataAccessException {

        ApplicationTO applicationTO = null;
        try
            {
                applicationTO = applicationService.getApplicationTO(adminDomainName);
            }
        catch (ApplicationPropertyException e)
            {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        UserTO userTO = getUserTO(applicationTO.getApplicationId(), userName);
        if (userTO == null)
            {
                throw new UsernameNotFoundException("user not found");
            }
        httpSession.setAttribute("userTO", userTO);
        return buildUserFromUserEntity(userTO);
    }


User buildUserFromUserEntity(UserTO userTO)
            {
                String username = userTO.getUsername();
                String password = userTO.getPassword();
                int userId = userTO.getUserId();
                int applicationId = userTO.getApplicationId();
                boolean enabled = userTO.isEnabled();
                boolean accountNonExpired = true;
                boolean credentialsNonExpired = true;
                boolean accountNonLocked = true;
                User user = new User(username, password, enabled, accountNonExpired, credentialsNonExpired, accountNonLocked, getAuthority(applicationId, userId));
                return user;
            }

我对 Spring 比较陌生，对 Spring Security 部分没有太多了解。在我的 spring-security.xml 文件中，我有以下内容，

<form-login login-page="/login" default-target-url="/module/user-home/welcome"
    authentication-failure-url="/login?error" username-parameter="username"
    password-parameter="password" />
<logout logout-success-url="/login?logout" />

<beans:bean id="daoAuthenticationProvider"
 class="org.springframework.security.authentication.dao.DaoAuthenticationProvider">
  <beans:property name="userDetailsService" ref="userDetailsService"/>
</beans:bean>

<beans:bean id="authenticationManager"
    class="org.springframework.security.authentication.ProviderManager">
  <beans:property name="providers">
    <beans:list>
      <beans:ref local="daoAuthenticationProvider" />
    </beans:list>
  </beans:property>
</beans:bean>

我的登录表单的操作设置如下:

<form id="loginForm" class="form-horizontal" role="form" name='loginForm' action="${rc.getContextPath()}/j_spring_security_check" method='POST'>

现在我试图获取用户在登录表单中输入的password的值，无论是在loadUserByUsername方法中还是通过添加一个新方法来获取UserServiceImpl.java 类。

在保存密码之前，我使用以下方法对其进行加密。 What API and algorithm to be used to encrypt and decrypt a password using java

因此在登录过程中，spring security 会将用户输入的密码与数据库中的加密密码进行比较，然后登录失败。但根据上面链接中建议的实现，有一种方法可以比较密码和加密密码以检查它们是否相同。只有当我能够访问用户输入的密码时，才有可能实现这一点。这就是我试图获取用户输入密码的原因。

Answer 1

如果需要，您可以创建自己的 AuthenticationProvider

public class CustomAuthenticationProvider implements AuthenticationProvider{

    private UserDetailsService service;

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        UsernamePasswordAuthenticationToken token = (UsernamePasswordAuthenticationToken) authentication;
        String username = token.getName();
        String password = token.getCredentials(); // retrieve the password 
        // do something here

        // if ok then return the authentication
        return new UsernamePasswordAuthenticationToken(username, password, authorities);
    }
}

并将其插入您的安全配置

<beans:bean id="customAuthenticationProvider"
 class="com.xxx.CustomAuthenticationProvider">
  <beans:property name="userDetailsService" ref="userDetailsService"/>
</beans:bean>

<beans:bean id="authenticationManager"
    class="org.springframework.security.authentication.ProviderManager">
  <beans:property name="providers">
    <beans:list>
      <beans:ref local="customAuthenticationProvider" />
    </beans:list>
  </beans:property>
</beans:bean>