Spring Security配置
Spring Security配置是通过 @EnableWebSecurity注释和WebSecurityConfigurerAdapter共同提供基于网络的安全性。
WebSecurityConfigurerAdapter类的configure(HttpSecurity http)方法是设置 HTTP 验证规则,configure(AuthenticationManagerBuilder auth)方法是自定义身份验证组件
/**
* @Author xiangjian
* @Date 2019/2/24
* @Description 实现WebSecurityConfigurerAdapter接口,
*/
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private UserDetailsService userDetailsService;
@Bean
public BCryptPasswordEncoder bCryptPasswordEncoder() {
return new BCryptPasswordEncoder();
}
/**
* 设置 HTTP 验证规则
* 复写这个方法来配置 {@link HttpSecurity}.
* 通常,子类不能通过调用 super 来调用此方法,因为它可能会覆盖其配置。 默认配置为:
* http.authorizeRequests().anyRequest().authenticated().and().formLogin().and().httpBasic();
* 匹配 "/" 路径,不需要权限即可访问
* 匹配 "/user" 及其以下所有路径,都需要 "USER" 权限
* 登录地址为 "/login",登录成功默认跳转到页面 "/user"
* 退出登录的地址为 "/logout",退出成功后跳转到页面 "/login"
* 默认启用 CSRF
* 用于配置权限认证的方式
* @param http
* @throws Exception
*/
@Override
protected void configure(HttpSecurity http) throws Exception {
//cors解决跨域问题
http.cors().and()
//关闭跨站请求伪造
.csrf().disable()
.authorizeRequests()
//api要允许匿名访问
.antMatchers(HttpMethod.OPTIONS).permitAll()
.antMatchers("/api/**").permitAll()
.antMatchers("/", "/*.html","/favicon.ico", "/css/**", "/js/**").permitAll().anyRequest().authenticated();
// 基于token,所以不需要session
http.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
// 解决不允许显示在iframe的问题
http.headers().frameOptions().disable();
// 禁用缓存
http.headers().cacheControl();
http.addFilter(new JWTLoginFilter(authenticationManager()));
http.addFilterBefore(new JWTAuthenticationFilter(authenticationManager()), UsernamePasswordAuthenticationFilter.class);
}
/**
* 使用自定义身份验证组件
* 重写安全认证,加入密码加密方式
* @param auth
* @throws Exception
*/
@Override
public void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
}
}
http.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)方法说明:
Spring Security下的枚举SessionCreationPolicy,管理session的创建策略
ALWAYS:总是创建HttpSession
IF_REQUIRED:Spring Security只会在需要时创建一个HttpSession
NEVER:Spring Security不会创建HttpSession,但如果它已经存在,将可以使用HttpSession
STATELESS:Spring Security永远不会创建HttpSession,它不会使用HttpSession来获取SecurityContext
spring-security主要包含二部分:第一是用户验证,第二是鉴权。
用户验证:UsernamePasswordAuthenticationFilter去进行用户账号的验证
鉴权:BasicAuthenticationFilter去进行用户权限的验证
JWTLoginFilter继承于UsernamePasswordAuthenticationFilter
用于获取用户登录的信息,创建一个token并调用authenticationManager.authenticate()让spring-security去进行验证
JWTAuthenticationFilter继承于BasicAuthenticationFilte用于权限验证,,每一次请求都需要检查该用户是否有该权限去操作该资源
JWTLoginFilter类
核心功能是在验证用户名密码正确后,生成一个token,并将token返回给客户端
该类继承自UsernamePasswordAuthenticationFilter,重写了其中的2个方法:
attemptAuthentication :接收并解析用户凭证。
successfulAuthentication :用户成功登录后,这个方法会被调用,我们在这个方法里生成token。
/**
* 验证用户名密码正确后,生成一个token,并将token返回给客户端
* 该类继承自UsernamePasswordAuthenticationFilter,重写了其中的2个方法
* attemptAuthentication :接收并解析用户凭证。
* successfulAuthentication :用户成功登录后,这个方法会被调用,我们在这个方法里生成token。
*/
public class JWTLoginFilter extends UsernamePasswordAuthenticationFilter {
private AuthenticationManager authenticationManager;
public JWTLoginFilter(AuthenticationManager authenticationManager) {
this.authenticationManager = authenticationManager;
}
// 接收并解析用户凭证
@Override
public Authentication attemptAuthentication(HttpServletRequest request,
HttpServletResponse response) throws AuthenticationException {
try {
SysUserDto user = GsonUtil.getInstance().fromJson(request.getReader(),SysUserDto.class);
return authenticationManager.authenticate(
new UsernamePasswordAuthenticationToken(
user.getUsername(),
user.getPassword(),
new ArrayList<>()));
} catch (JsonSyntaxException | JsonIOException | IOException | NullPointerException e) {
e.printStackTrace();
ResultBean result = new ResultBean<>();
result.setState(1);
result.setErrorMsg("参数格式错误");
ResponseUtil.responseJson(response, HttpStatus.BAD_REQUEST.value(), result);
}
return null;
}
@Override
protected void successfulAuthentication(HttpServletRequest request,
HttpServletResponse response,
FilterChain chain,
Authentication auth) throws IOException, ServletException {
LoginUserDetail loginUser = (LoginUserDetail) auth.getPrincipal();
String tokenStr = Jwts.builder()
.setSubject(loginUser.getUsername())
// 使用Cache记录jwt的token过滤缓存
// .setExpiration(new Date(System.currentTimeMillis() + 60 * 30 * 1 * 1000))
.signWith(SignatureAlgorithm.HS512, "CrmJwtSecret")
.compact();
JWTCacheUtil.CACHE.add("Bearer " + tokenStr,loginUser);
Token token = new Token(tokenStr,0L);
response.addHeader("Authorization", "Bearer " + token);
ResultBean result = new ResultBean<>();
result.setState(0);
ResponseUtil.responseJson(response, HttpStatus.OK.value(), token);
}
@Override
protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed) throws IOException, ServletException {
String msg;
if (failed instanceof BadCredentialsException) {
msg = "密码错误";
} else {
msg = failed.getMessage();
}
ResultBean result = new ResultBean<>();
result.setState(1);
result.setErrorMsg(msg);
ResponseUtil.responseJson(response, HttpStatus.UNAUTHORIZED.value(), result);
}
}
JWTAuthenticationFilter类
这个类中实现token的校验功能该类继承自BasicAuthenticationFilter,在doFilterInternal方法中,从http头的Authorization 项读取token数据,然后用Jwts包提供的方法校验token的合法性。如果校验通过,就认为这是一个取得授权的合法请求
/**
* token的校验
* 该类继承自BasicAuthenticationFilter,在doFilterInternal方法中,
* 从http头的Authorization 项读取token数据,然后用Jwts包提供的方法校验token的合法性。
* 如果校验通过,就认为这是一个取得授权的合法请求
*/
public class JWTAuthenticationFilter extends BasicAuthenticationFilter {
public JWTAuthenticationFilter(AuthenticationManager authenticationManager) {
super(authenticationManager);
}
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
String header = request.getHeader("Authorization");
if (header == null || !header.startsWith("Bearer ")) {
chain.doFilter(request, response);
return;
}
UsernamePasswordAuthenticationToken authentication = getAuthentication(request);
SecurityContextHolder.getContext().setAuthentication(authentication);
chain.doFilter(request, response);
}
private UsernamePasswordAuthenticationToken getAuthentication(HttpServletRequest request) {
String token = request.getHeader("Authorization");
try {
if (token != null) {
// parse the token.
if (JWTCacheUtil.CACHE.exist(token)){
LoginUserDetail loginUser = (LoginUserDetail) JWTCacheUtil.CACHE.get(token);
String user = Jwts.parser()
.setSigningKey("CrmJwtSecret")
.parseClaimsJws(token.replace("Bearer ", ""))
.getBody()
.getSubject();
if (user != null) {
UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(loginUser,
null, loginUser.getAuthorities());
return authentication;
}
}
}
} catch (ExpiredJwtException | UnsupportedJwtException | MalformedJwtException
| io.jsonwebtoken.SignatureException | IllegalArgumentException e) {
return null;
}
return null;
}
}
JWT来处理用户名密码的认证。区别在于,认证通过后,服务器生成一个token,将token返回给客户端,客户端以后的所有请求都需要在http头中指定该token。服务器接收的请求后,会对token的合法性进行验证。验证的内容包括:JWT格式、检查签名、检查claims、检查权限