spring security认证

Posted 2021-02-05 fight139

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1 开发基于表单的认证

Spring security核心的功能

认证（你是谁？）
授权（你能干什么？）
攻击防护（防止伪造身份）

spring security实现了默认的用户名+密码认证，默认用户名为user，密码为：

spring security基本原理：过滤器链

　　对于UsernamePasswordAuthenticationFilter只会拦截 url为/login，method为POST的请求。

1.1 自定义用户认证逻辑

1）处理用户信息获取逻辑

　　UserDetailsService接口，只有一个方法：loadUserByUsername

实现该接口：数据库中存放的是加密密码，对于同一个密码不同时间的加密密文不一样

@Component
public class MyUserDetailsService implements UserDetailsService {
    private Logger logger = LoggerFactory.getLogger(getClass());
    @Autowired
    private PasswordEncoder passwordEncoder;
    @Override
    public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
        logger.info("用户名信息：" + s);
        // 根据用户名查找用户信息
        logger.info("数据库密码：" + passwordEncoder.encode("123456"));
        // 用户名和密码信息用来做认证，权限信息用来对该用户做授权
        return new User(s, "$2a$10$eFw06n0ABK2NFuse8y5f/eDUq7we26qQTceEtXSWNbMXnQ5Yf5Iha",
                AuthorityUtils.commaSeparatedStringToAuthorityList("admin"));
    }
}

2）处理用户信息校验逻辑

　　处理密码加密解密：在配置文件中将PasswordEncoder对象注入spring容器，等价于@Component+包扫描组件

1.2 个性化用户认证流程

1）对于浏览器，返回自定义登录页面，让UsernamePasswordXxxFilter来处理登录请求；对于调用RESTful服务，返回json错误信息。

　用户登录成功后，对于浏览器，返回需要的页面；对于服务，返回json数据。

　　权限配置：

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.formLogin()// 表单登录
                .loginPage("/authentication/require") //将登录页面重定向到controller
                .loginProcessingUrl("/authentication/form")
                .and()
                .authorizeRequests() //请求授权
                .antMatchers("/authentication/require",
                        securityProperties.getBrowser().getLoginPage()).permitAll()//该页面允许通过
                .anyRequest()
                .authenticated()  // 其他资源需要认证
                .and()
                .csrf().disable();  // 将跨站防护关掉
    }

　　控制器,根据之前URL的路径判断是否为RESTful服务，在处理

/*
当客户端发出请求，当需要认证时，spring security会重定向到该控制器
 */
@RestController
public class BrowserSecurityController {
    private Logger logger = LoggerFactory.getLogger(getClass());

    // 请求缓存
    private RequestCache requestCache = new HttpSessionRequestCache();
    private RedirectStrategy redirectStrategy = new DefaultRedirectStrategy();
    @Autowired
    private SecurityProperties securityProperties;
    /**
     * 当需要身份认证时跳转到这里
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("/authentication/require")
    @ResponseStatus(code = HttpStatus.UNAUTHORIZED)
    public SimpleResponse requireAuthentication(HttpServletRequest request, HttpServletResponse response) throws IOException {
        // 判断请求类型，html或者app
        SavedRequest savedRequest = requestCache.getRequest(request, response);
        if(savedRequest!=null){
            String targetUrl = savedRequest.getRedirectUrl();
            logger.info("引发跳转的URL："+targetUrl);
            // 如果之前的URL为.html结尾的URL，则重定向到登录页面
            if(StringUtils.endsWithIgnoreCase(targetUrl, ".html")){
                redirectStrategy.sendRedirect(request, response,
                        securityProperties.getBrowser().getLoginPage());
            }
        }
        return new SimpleResponse("请求的服务需要身份认证，请引导用户到登录页面");
    }
}

BrowserSecurityController.java

　　在启动项目中的application.properties文件中配置登录页面：

# 配置登录页面
getword.security.browser.loginPage=/demo.html

　　读取配置文件信息：

import org.springframework.boot.context.properties.ConfigurationProperties;

// 读取前缀为getword.security的属性配置，其中browser中的属性会被读取到browserProperties中
@ConfigurationProperties(prefix = "getword.security")
public class SecurityProperties {
    // browser的属性会匹配getword.security.browser后面的属性
    private BrowserProperties browser = new BrowserProperties();

    public BrowserProperties getBrowser() {
        return browser;
    }

    public void setBrowser(BrowserProperties browser) {
        this.browser = browser;
    }
}

SecurityProperties.java

public class BrowserProperties {
    private String loginPage = "/login.html"; //默认值

    public String getLoginPage() {
        return loginPage;
    }

    public void setLoginPage(String loginPage) {
        this.loginPage = loginPage;
    }
}

BrowserProperties.java

@Configuration
@EnableConfigurationProperties(SecurityProperties.class) //让属性配置读取器生效
public class SecurityCodeConfig {
}

2）自定义登录成功处理，异步登录，AuthenticationSuccessHandler接口

　　自定义登录成处理：

@Component("vstudyAuthenticationSuccessHandler")
public class VstudyAuthenticationSuccessHandler implements AuthenticationSuccessHandler {
    private Logger logger = LoggerFactory.getLogger(getClass());
    //工具类, 将对象转成json
    @Autowired
    private ObjectMapper objectMapper;
    // 登录成功后调用
    @Override
    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
        logger.info("登录成功");
        response.setContentType("application/json;charset=utf-8");
        response.getWriter().write(objectMapper.writeValueAsString(authentication));
    }
}

VstudyAuthenticationSuccessHandler

3）登录失败处理

@Component("vstudyAuthenticationFailHandler")
public class VstudyAuthenticationFailHandler implements AuthenticationFailureHandler {
    @Autowired
    private ObjectMapper objectMapper;

    private Logger logger = LoggerFactory.getLogger(getClass());
    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response,
                                        AuthenticationException e) throws IOException, ServletException {
        logger.info("登录失败");
        response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value()); //服务器内部错误
        response.setContentType("application/json;charset=utf-8");
        response.getWriter().write(objectMapper.writeValueAsString(e));
    }
}

VstudyAuthenticationFailHandler.java

配置：和success类似

4）判断请求方式，做出相应的处理

successHandler：

@Component("vstudyAuthenticationSuccessHandler")
public class VstudyAuthenticationSuccessHandler extends SavedRequestAwareAuthenticationSuccessHandler {
    private Logger logger = LoggerFactory.getLogger(getClass());
    //工具类, 将对象转成json
    @Autowired
    private ObjectMapper objectMapper;

    @Autowired
    private SecurityProperties securityProperties; //获取配置信息

    // 登录成功后调用
    @Override
    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
        logger.info("登录成功");
        if(LoginType.JSON.equals(securityProperties.getBrowser().getLoginType())){
            response.setContentType("application/json;charset=utf-8");
            response.getWriter().write(objectMapper.writeValueAsString(authentication));
        }else{
            // 调用父类方法，完成重定向跳转
            super.onAuthenticationSuccess(request, response, authentication);
        }
    }
}

VstudyAuthenticationSuccessHandler

failureHandler：

@Component("vstudyAuthenticationFailHandler")
public class VstudyAuthenticationFailHandler extends SimpleUrlAuthenticationFailureHandler {
    @Autowired
    private SecurityProperties securityProperties;
    @Autowired
    private ObjectMapper objectMapper;

    private Logger logger = LoggerFactory.getLogger(getClass());
    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response,
                                        AuthenticationException e) throws IOException, ServletException {
        logger.info("登录失败");
        if(LoginType.JSON.equals(securityProperties.getBrowser().getLoginType())){
            response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value()); //服务器内部错误
            response.setContentType("application/json;charset=utf-8");
            response.getWriter().write(objectMapper.writeValueAsString(e));
        }else{
            super.onAuthenticationFailure(request, response, e);
        }
    }
}

VstudyAuthenticationFailHandler

2 认证流程

3 图形验证码

3.1 生成图形验证码

　　验证码图片信息：

public class ImageCode {
    private BufferedImage image;
    private String code;
    private LocalDateTime expireTime;//过期时间
    public ImageCode(BufferedImage image, String code, int expireIn){
        this.image = image;
        this.code = code;
        this.expireTime = LocalDateTime.now().plusSeconds(expireIn);
    }

    public ImageCode(BufferedImage image, String code, LocalDateTime expireTime){
        this.image = image;
        this.code = code;
        this.expireTime = expireTime;
    }
}

ImageCode

　　控制器：

@RestController
public class ValidateCodeController {
    public static String SESSION_KEY = "SESSION_KEY_IMAGE_CODE";
    private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();

    @Autowired
    private SecurityProperties securityProperties;

    @GetMapping("/image/code")
    public void createCode(HttpServletRequest request, HttpServletResponse response) throws IOException {
        ImageCode imageCode = createImageCode(new ServletWebRequest(request,response));
        sessionStrategy.setAttribute(new ServletWebRequest(request, response), SESSION_KEY, imageCode);
        ImageIO.write(imageCode.getImage(), "JPEG", response.getOutputStream());
    }

    /**
     * 生成ImageCode验证码
     * @param request
     * @return
     */
    public ImageCode createImageCode(ServletWebRequest request){
        // 生成验证码，方法很多
        int width = 60;
        int height = 20;
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

        Graphics g = image.getGraphics();

        Random random = new Random();

        g.setColor(getRandColor(200, 250));
        g.fillRect(0, 0, width, height);
        g.setFont(new Font("Times New Roman", Font.ITALIC, 20));
        g.setColor(getRandColor(160, 200));
        for (int i = 0; i < 155; i++) {
            int x = random.nextInt(width);
            int y = random.nextInt(height);
            int xl = random.nextInt(12);
            int yl = random.nextInt(12);
            g.drawLine(x, y, x + xl, y + yl);
        }

        String sRand = "";
        for (int i = 0; i < 4; i++) {
            String rand = String.valueOf(random.nextInt(10));
            sRand += rand;
            g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
            g.drawString(rand, 13 * i + 6, 16);
        }

        g.dispose();

        return new ImageCode(image, sRand, 100);
    }
    /**
     * 生成随机背景条纹
     *
     * @param fc
     * @param bc
     * @return
     */
    private Color getRandColor(int fc, int bc) {
        Random random = new Random();
        if (fc > 255) {
            fc = 255;
        }
        if (bc > 255) {
            bc = 255;
        }
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }
}

ValidateCodeController

3.2 验证码校验

自定义过滤器：

public class ValidateCodeFilter extends OncePerRequestFilter {
    /**
     * 验证码校验失败处理器
     */
    private AuthenticationFailureHandler authenticationFailureHandler;
    /**
     * 系统配置信息
     */
    private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();
    /**
     * 系统中的校验码处理器
     */

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {

        // 只处理登录请求
        if (StringUtils.equals("/authetication/form", request.getRequestURI())
                && StringUtils.equalsIgnoreCase(request.getMethod(), "POST")) {
            try {
                logger.info("验证码校验通过");
            } catch (ValidateCodeException e) {
                //验证失败
                authenticationFailureHandler.onAuthenticationFailure(request, response, e);
            }
        }

        filterChain.doFilter(request, response);
    }
    protected void validate(ServletWebRequest request) throws ServletRequestBindingException {
        // 从session中拿到imageCode
        ImageCode codeInSession = (ImageCode) sessionStrategy.getAttribute(request, ValidateCodeController.SESSION_KEY);
        // 获取客户端输入的code,当前请求参数
        String codeInRequest = ServletRequestUtils.getStringParameter(request.getRequest(), "imageCode");
        if(StringUtils.isBlank(codeInRequest)){
            throw new ValidateCodeException("验证码不能为空");
        }
        if(codeInSession==null){
            throw new ValidateCodeException("验证码不存在");
        }
        if(codeInSession.isExpired()){
            throw new ValidateCodeException("验证码已过期");
        }
        if(!StringUtils.equalsIgnoreCase(codeInSession.getCode(), codeInRequest)){
            throw new ValidateCodeException("验证码不匹配");
        }
        sessionStrategy.removeAttribute(request, ValidateCodeController.SESSION_KEY);
    }

    public AuthenticationFailureHandler getAuthenticationFailureHandler() {
        return authenticationFailureHandler;
    }

    public void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
        this.authenticationFailureHandler = authenticationFailureHandler;
    }
}

ValidateCodeFilter

配置：

执行流程：

/index.html ->redirect ->/authentication/require（控制器，判断是.html结尾）->login.html ->ValidateCodeFilter ->exception -> VstudyAuthenticationFailHandler ->loginType:JSON

3.3 验证码的接口

为了方便修改验证码的参数，如宽度、高度、长度等信息，我们将通过配置文件的形式配置这些信息。还有验证码的URL地址。
验证码拦截的接口可配置，比如为了限制用户操作频率，对用户操作使用验证码进行限制。验证码过滤器可以拦截多个控制器请求。
验证码的生成逻辑可以配置

三级配置：

1）验证码参数：

　　默认配置：

/**
 * 图形验证码
 */
public class ImageCodeProperties {
    private int width = 67;
    private int height = 23;
    private int len = 4;
    private int expireIn = 60; //60秒后过期
//seter getter
}

验证码信息：

/**
 * 验证码：包括图形验证码、短信验证码
 */
public class ValidateCodeProperties {
    private ImageCodeProperties image;
}

属性读取：

@ConfigurationProperties(prefix = "getword.security")
public class SecurityProperties {
    // browser的属性会匹配getword.security.browser后面的属性
    private BrowserProperties browser = new BrowserProperties();

    // 验证码属性匹配getword.security.code后面的属性
    private ValidateCodeProperties code = new ValidateCodeProperties();
}

end

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