通过 LDAP 存储库验证 LDAP

Question

我无法从我的 LDAP 服务器（在 SSHA 中）解析不同的编码类型以及纯文本的身份验证值。

我正在使用 LDAP 存储库来检索我的 LDAP 服务器，并使用了AuthenticationManager 和我自己的 `UserDetailService.

当我尝试进行身份验证时，问题总是会收到错误的凭据异常。

如下面的代码所示；

当我请求/auth 时，我有一个纯文本username 和password。但是，当我尝试通过AuthenticationManager 对其进行身份验证时，它给了我一个错误的凭据。现在，我知道这与我在UsernamePasswordAuthenticationToken 中提供的UserDetailService.getPassword() 和password 有关。它关于不同的加密类型。我的 LDAP 有一个 {SSHA}，也翻译成二进制（字节），编码器是 Bcrypt 和 String。

现在我的问题是，您如何针对 LdapRespository 返回的密码正确地验证密码？

更新

2020-04-12 17:09:46.655  INFO 6672 --- [nio-8080-exec-1] s.w.s.SantaRestApiSecurityConfiguration  : Raw Password:  jdoe123 | Encoded Password: {SSHA}kMgk3gD4prAa/9m4wsPbuAoGhO7UvH2v6+W0Dg==
2020-04-12 17:09:58.110  INFO 6672 --- [nio-8080-exec-1] s.w.s.SantaRestApiSecurityConfiguration  : Raw Password: {SSHA}kMgk3gD4prAa/9m4wsPbuAoGhO7UvH2v6+W0Dg== matches Encoded Password: {SSHA}k1Pp3NICHbwuxFFdT7zno/iG/NTILZGL = false

以上日志是在PasswordEncoder 的密码匹配期间。以此为基础。它表明 原始密码（由用户输入）与 编码密码（来自 ldap 服务器）具有不同的哈希值。

我使用LdapShaPasswordEncoder.encode 对用户输入的密码进行哈希处理。

另外，我注意到每次我想进行身份验证（调用http://locahost:xxxx/auth）时，用户每次都输入密码的哈希更改。我认为哈希时这是正常的

安全配置 注意：我现在允许所有 REST-API 端点，稍后我会限制它

@Configuration
@EnableWebSecurity
public class SantaRestApiSecurityConfiguration extends WebSecurityConfigurerAdapter   {

    @Autowired
    AuthService authService;

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        // configure AuthenticationManager so that it knows from where to load
        // user for matching credentials
        // Use BCryptPasswordEncoder
        auth.userDetailsService(authService).passwordEncoder(passwordEncoder());
    }

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

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        // TODO Auto-generated method stub
        http.csrf()
            .disable()
            .authorizeRequests().antMatchers("/*").permitAll();
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/*");
    }

    /*
     * i am not sure about this since my LDAP server has 
     * a SSHA password encrpytion
     * 
     * */
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
}

登录控制器

@RestController
@RequestMapping("/auth")
public class LoginController {

    public static Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private AuthenticationManager authManager;

    @PostMapping
    public ResponseEntity<String> login(@RequestBody Map<String, String> credentials) {
        String username = credentials.get("username");
        String password = credentials.get("password");

        authManager.authenticate(new UsernamePasswordAuthenticationToken(username, password));

        return new ResponseEntity<String>("", HttpStatus.OK);
    }
}

UserDetailService 实现

@Service
public class AuthService implements UserDetailsService {

    public static Logger logger = LoggerFactory.getLogger(AuthService.class);

    @Autowired
    UserLdapRepository ldapRepo;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {

        UserLdap e = ldapRepo.findByUid(username);
        logger.info("{}",e.toString());

        return new AuthDetails(e.getCn(), 
                               e.getPassword(),
                               e.getUid(), 
                               e.getMail(), 
                               e.getSn(), 
                               Long.toString( e.getUidNumber()));
    }
}

UserDetails 实现

public class AuthDetails implements UserDetails {

    public static Logger logger = LoggerFactory.getLogger(AuthDetails.class);

    private String username;
    private String password;
    private String email;
    private String uidNumber;
    private String sn;
    private String uid;

    public AuthDetails(String username, String password, String uid, String email,String sn, String uidNumber) {
        this.uid = uid;
        this.password = password;
        this.username = username;
        this.email = email;
        this.sn = sn;
        this.uidNumber = uidNumber;
    }

    /*
     * Here i am not sure how to implement this one to satisfy AuthenticationManager
     *
     *
     **/
    @Override
    public String getPassword() {
        return this.password;
    }

    @Override
    public String getUsername() {
        // TODO Auto-generated method stub
        return this.username;
    }

    // some method to implement

}

Answer 1

您正在使用 BCryptPasswordEncoder，但在 LDAP 中使用的是 SSHA 加密。

需要修改SantaRestApiSecurityConfiguration类中的方法passwordEncoder

  @Bean
public PasswordEncoder passwordEncoder() {
   return  new LdapShaPasswordEncoder();

}



public Class UserLdap {

    @Attribute(name = "userPassword", type = Type.BINARY)
    private byte[] password;
}

并更改方法 loadUserByUsername

@Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {

        UserLdap e = ldapRepo.findByUid(username);
        logger.info("{}",e.toString());
        String password = "{SSHA}" + new String(e.getPassword());
        return new AuthDetails(e.getCn(), 
                               password,
                               e.getUid(), 
                               e.getMail(), 
                               e.getSn(), 
                               Long.toString( e.getUidNumber()));
    }