基于shiro的改造集成真正支持restful请求
这个模块分离至项目[api权限管理系统与前后端分离实践]api权限管理系统与前后端分离实践，感觉那样太长了找不到重点，分离出来要好点。
首先说明设计的这个安全体系是是RBAC(基于角色的权限访问控制)授权模型，即用户--角色--资源，用户不直接和权限打交道，角色拥有资源，用户拥有这个角色就有权使用角色所用户的资源。所有这里没有权限一说，签发jwt里面也就只有用户所拥有的角色而没有权限。
为啥说是真正的restful风格集成，虽说shiro对rest不友好但他本身是有支持rest集成的filter--HttpMethodPermissionFilter，这个shiro rest的 风格拦截器，会自动根据请求方法构建权限字符串( GET=read,POST=create,PUT=update,DELETE=delete)构建权限字符串;eg: /users=rest[user] , 会 自动拼接出user:read,user:create,user:update,user:delete”权限字符串进行权限匹配(所有都得匹配，isPermittedAll)。
但是这样感觉不利于基于jwt的角色的权限控制，在细粒度上验权url(即支持get,post,delete鉴别)就更没法了(个人见解)。打个比方：我们对一个用户签发的jwt写入角色列(role_admin,role_customer)。对不同request请求：url="api/resource/",httpMethod="GET"，url="api/resource",httpMethod="POST",在基于角色-资源的授权模型中，这两个url相同的请求对HttpMethodPermissionFilter是一种请求，用户对应的角色拥有的资源url="api/resource"，只要请求的url是"api/resource"，不论它的请求方式是什么，都会判定通过这个请求，这在restful风格的api中肯定是不可取的，对同一资源有些角色可能只要查询的权限而没有修改增加的权限。
可能会说在jwt中再增加权限列就好了嘛，但是在基于用户-资源的授权模型中，虽然能判别是不同的请求，但是太麻烦了，对每个资源我们都要设计对应的权限列然后再塞入到jwt中，对每个用户都要单独授权资源这也是不可取的。
对shiro的改造这里自定义了一些规则:
shiro过滤器链的url=url+"=="+httpMethod
eg:对于url="api/resource/",httpMethod="GET"的资源,其拼接出来的过滤器链匹配url=api/resource==GET
这样对相同的url而不同的访问方式，会判定为不同的资源，即资源不再简单是url，而是url和httpMethod的组合。基于角色的授权模型中，角色所拥有的资源形式为url+"=="+httpMethod。
这里改变了过滤器的过滤匹配url规则，重写PathMatchingFilterChainResolver的getChain方法，增加对上述规则的url的支持。
/* *
* @Author tomsun28
* @Description
* @Date 21:12 2018/4/20
*/
public class RestPathMatchingFilterChainResolver extends PathMatchingFilterChainResolver {
private static final Logger LOGGER = LoggerFactory.getLogger(RestPathMatchingFilterChainResolver.class);
public RestPathMatchingFilterChainResolver() {
super();
}
public RestPathMatchingFilterChainResolver(FilterConfig filterConfig) {
super(filterConfig);
}
/* *
* @Description 重写filterChain匹配
* @Param [request, response, originalChain]
* @Return javax.servlet.FilterChain
*/
@Override
public FilterChain getChain(ServletRequest request, ServletResponse response, FilterChain originalChain) {
FilterChainManager filterChainManager = this.getFilterChainManager();
if (!filterChainManager.hasChains()) {
return null;
} else {
String requestURI = this.getPathWithinApplication(request);
Iterator var6 = filterChainManager.getChainNames().iterator();
String pathPattern;
boolean flag = true;
String[] strings = null;
do {
if (!var6.hasNext()) {
return null;
}
pathPattern = (String)var6.next();
strings = pathPattern.split("==");
if (strings.length == 2) {
// 分割出url+httpMethod,判断httpMethod和request请求的method是否一致,不一致直接false
if (WebUtils.toHttp(request).getMethod().toUpperCase().equals(strings[1].toUpperCase())) {
flag = false;
} else {
flag = true;
}
} else {
flag = false;
}
pathPattern = strings[0];
} while(!this.pathMatches(pathPattern, requestURI) || flag);
if (LOGGER.isTraceEnabled()) {
LOGGER.trace("Matched path pattern [" + pathPattern + "] for requestURI [" + requestURI + "]. Utilizing corresponding filter chain...");
}
if (strings.length == 2) {
pathPattern = pathPattern.concat("==").concat(WebUtils.toHttp(request).getMethod().toUpperCase());
}
return filterChainManager.proxy(originalChain, pathPattern);
}
}
}
重写PathMatchingFilter的路径匹配方法pathsMatch()，加入httpMethod支持。
/* *
* @Author tomsun28
* @Description 重写过滤链路径匹配规则，增加REST风格post,get.delete,put..支持
* @Date 23:37 2018/4/19
*/
public abstract class BPathMatchingFilter extends PathMatchingFilter {
public BPathMatchingFilter() {
}
/* *
* @Description 重写URL匹配 加入httpMethod支持
* @Param [path, request]
* @Return boolean
*/
@Override
protected boolean pathsMatch(String path, ServletRequest request) {
String requestURI = this.getPathWithinApplication(request);
// path: url==method eg: http://api/menu==GET 需要解析出path中的url和httpMethod
String[] strings = path.split("==");
if (strings.length <= 1) {
// 分割出来只有URL
return this.pathsMatch(strings[0], requestURI);
} else {
// 分割出url+httpMethod,判断httpMethod和request请求的method是否一致,不一致直接false
String httpMethod = WebUtils.toHttp(request).getMethod().toUpperCase();
return httpMethod.equals(strings[1].toUpperCase()) && this.pathsMatch(strings[0], requestURI);
}
}
}这样增加httpMethod的改造就完成了，重写ShiroFilterFactoryBean使其使用改造后的chainResolver：RestPathMatchingFilterChainResolver
/* *
* @Author tomsun28
* @Description rest支持的shiroFilterFactoryBean
* @Date 21:35 2018/4/20
*/
public class RestShiroFilterFactoryBean extends ShiroFilterFactoryBean {
private static final Logger LOGGER = LoggerFactory.getLogger(RestShiroFilterFactoryBean.class);
public RestShiroFilterFactoryBean() {
super();
}
@Override
protected AbstractShiroFilter createInstance() throws Exception {
LOGGER.debug("Creating Shiro Filter instance.");
SecurityManager securityManager = this.getSecurityManager();
String msg;
if (securityManager == null) {
msg = "SecurityManager property must be set.";
throw new BeanInitializationException(msg);
} else if (!(securityManager instanceof WebSecurityManager)) {
msg = "The security manager does not implement the WebSecurityManager interface.";
throw new BeanInitializationException(msg);
} else {
FilterChainManager manager = this.createFilterChainManager();
RestPathMatchingFilterChainResolver chainResolver = new RestPathMatchingFilterChainResolver();
chainResolver.setFilterChainManager(manager);
return new RestShiroFilterFactoryBean.SpringShiroFilter((WebSecurityManager)securityManager, chainResolver);
}
}
private static final class SpringShiroFilter extends AbstractShiroFilter {
protected SpringShiroFilter(WebSecurityManager webSecurityManager, FilterChainResolver resolver) {
if (webSecurityManager == null) {
throw new IllegalArgumentException("WebSecurityManager property cannot be null.");
} else {
this.setSecurityManager(webSecurityManager);
if (resolver != null) {
this.setFilterChainResolver(resolver);
}
}
}
}
}上面是一些核心的代码片段，更多请看项目代码。
对用户账户登录注册的过滤filter：PasswordFilter
/* *
* @Author tomsun28
* @Description 基于 用户名密码 的认证过滤器
* @Date 20:18 2018/2/10
*/
public class PasswordFilter extends AccessControlFilter {
private static final Logger LOGGER = LoggerFactory.getLogger(PasswordFilter.class);
private StringRedisTemplate redisTemplate;
@Override
protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) {
Subject subject = getSubject(request,response);
// 如果其已经登录，再此发送登录请求
if(null != subject && subject.isAuthenticated()){
return true;
}
// 拒绝，统一交给 onAccessDenied 处理
return false;
}
@Override
protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {
// 判断若为获取登录注册加密动态秘钥请求
if (isPasswordTokenGet(request)) {
//动态生成秘钥，redis存储秘钥供之后秘钥验证使用，设置有效期5秒用完即丢弃
String tokenKey = CommonUtil.getRandomString(16);
try {
redisTemplate.opsForValue().set("PASSWORD_TOKEN_KEY_"+request.getRemoteAddr().toUpperCase(),tokenKey,5, TimeUnit.SECONDS);
// 动态秘钥response返回给前端
Message message = new Message();
message.ok(1000,"issued tokenKey success")
.addData("tokenKey",tokenKey);
RequestResponseUtil.responseWrite(JSON.toJSONString(message),response);
}catch (Exception e) {
LOGGER.warn(e.getMessage(),e);
// 动态秘钥response返回给前端
Message message = new Message();
message.ok(1000,"issued tokenKey fail");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),response);
}
return false;
}
// 判断是否是登录请求
if(isPasswordLoginPost(request)){
AuthenticationToken authenticationToken = createPasswordToken(request);
Subject subject = getSubject(request,response);
try {
subject.login(authenticationToken);
//登录认证成功,进入请求派发json web token url资源内
return true;
}catch (AuthenticationException e) {
LOGGER.warn(authenticationToken.getPrincipal()+"::"+e.getMessage(),e);
// 返回response告诉客户端认证失败
Message message = new Message().error(1002,"login fail");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),response);
return false;
}catch (Exception e) {
LOGGER.error(e.getMessage(),e);
// 返回response告诉客户端认证失败
Message message = new Message().error(1002,"login fail");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),response);
return false;
}
}
// 判断是否为注册请求,若是通过过滤链进入controller注册
if (isAccountRegisterPost(request)) {
return true;
}
// 之后添加对账户的找回等
// response 告知无效请求
Message message = new Message().error(1111,"error request");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),response);
return false;
}
private boolean isPasswordTokenGet(ServletRequest request) {
// String tokenKey = request.getParameter("tokenKey");
String tokenKey = RequestResponseUtil.getParameter(request,"tokenKey");
return (request instanceof HttpServletRequest)
&& ((HttpServletRequest) request).getMethod().toUpperCase().equals("GET")
&& null != tokenKey && "get".equals(tokenKey);
}
private boolean isPasswordLoginPost(ServletRequest request) {
// String password = request.getParameter("password");
// String timestamp = request.getParameter("timestamp");
// String methodName = request.getParameter("methodName");
// String appId = request.getParameter("appId");
Map map = RequestResponseUtil.getRequestParameters(request);
String password = map.get("password");
String timestamp = map.get("timestamp");
String methodName = map.get("methodName");
String appId = map.get("appId");
return (request instanceof HttpServletRequest)
&& ((HttpServletRequest) request).getMethod().toUpperCase().equals("POST")
&& null != password
&& null != timestamp
&& null != methodName
&& null != appId
&& methodName.equals("login");
}
private boolean isAccountRegisterPost(ServletRequest request) {
// String uid = request.getParameter("uid");
// String methodName = request.getParameter("methodName");
// String username = request.getParameter("username");
// String password = request.getParameter("password");
Map map = RequestResponseUtil.getRequestParameters(request);
String uid = map.get("uid");
String username = map.get("username");
String methodName = map.get("methodName");
String password = map.get("password");
return (request instanceof HttpServletRequest)
&& ((HttpServletRequest) request).getMethod().toUpperCase().equals("POST")
&& null != username
&& null != password
&& null != methodName
&& null != uid
&& methodName.equals("register");
}
private AuthenticationToken createPasswordToken(ServletRequest request) {
// String appId = request.getParameter("appId");
// String password = request.getParameter("password");
// String timestamp = request.getParameter("timestamp");
Map map = RequestResponseUtil.getRequestParameters(request);
String appId = map.get("appId");
String timestamp = map.get("timestamp");
String password = map.get("password");
String host = request.getRemoteAddr();
String tokenKey = redisTemplate.opsForValue().get("PASSWORD_TOKEN_KEY_"+host.toUpperCase());
return new PasswordToken(appId,password,timestamp,host,tokenKey);
}
public void setRedisTemplate(StringRedisTemplate redisTemplate) {
this.redisTemplate = redisTemplate;
}
}
支持restful风格的jwt鉴权filter：BJwtFilter
/* *
* @Author tomsun28
* @Description 支持restful url 的过滤链 JWT json web token 过滤器，无状态验证
* @Date 0:04 2018/4/20
*/
public class BJwtFilter extends BPathMatchingFilter {
private static final Logger LOGGER = LoggerFactory.getLogger(BJwtFilter.class);
private StringRedisTemplate redisTemplate;
private AccountService accountService;
protected boolean isAccessAllowed(ServletRequest servletRequest, ServletResponse servletResponse, Object mappedValue) throws Exception {
Subject subject = getSubject(servletRequest,servletResponse);
// 判断是否为JWT认证请求
if ((null == subject || !subject.isAuthenticated()) && isJwtSubmission(servletRequest)) {
AuthenticationToken token = createJwtToken(servletRequest);
try {
subject.login(token);
// return this.checkRoles(subject,mappedValue) && this.checkPerms(subject,mappedValue);
return this.checkRoles(subject,mappedValue);
}catch (AuthenticationException e) {
LOGGER.info(e.getMessage(),e);
// 如果是JWT过期
if (e.getMessage().equals("expiredJwt")) {
// 这里初始方案先抛出令牌过期，之后设计为在Redis中查询当前appId对应令牌，其设置的过期时间是JWT的两倍，此作为JWT的refresh时间
// 当JWT的有效时间过期后，查询其refresh时间，refresh时间有效即重新派发新的JWT给客户端，
// refresh也过期则告知客户端JWT时间过期重新认证
// 当存储在redis的JWT没有过期，即refresh time 没有过期
String appId = WebUtils.toHttp(servletRequest).getHeader("appId");
String jwt = WebUtils.toHttp(servletRequest).getHeader("authorization");
String refreshJwt = redisTemplate.opsForValue().get("JWT-SESSION-"+appId);
if (null != refreshJwt && refreshJwt.equals(jwt)) {
// 重新申请新的JWT
// 根据appId获取其对应所拥有的角色(这里设计为角色对应资源，没有权限对应资源)
String roles = accountService.loadAccountRole(appId);
long refreshPeriodTime = 36000L; //seconds为单位,10 hours
String newJwt = JsonWebTokenUtil.issueJWT(UUID.randomUUID().toString(),appId,
"token-server",refreshPeriodTime >> 2,roles,null, SignatureAlgorithm.HS512);
// 将签发的JWT存储到Redis： {JWT-SESSION-{appID} , jwt}
redisTemplate.opsForValue().set("JWT-SESSION-"+appId,newJwt,refreshPeriodTime, TimeUnit.SECONDS);
Message message = new Message().ok(1005,"new jwt").addData("jwt",newJwt);
RequestResponseUtil.responseWrite(JSON.toJSONString(message),servletResponse);
return false;
}else {
// jwt时间失效过期,jwt refresh time失效 返回jwt过期客户端重新登录
Message message = new Message().error(1006,"expired jwt");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),servletResponse);
return false;
}
}
// 其他的判断为JWT错误无效
Message message = new Message().error(1007,"error Jwt");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),servletResponse);
return false;
}catch (Exception e) {
// 其他错误
LOGGER.warn(servletRequest.getRemoteAddr()+"JWT认证"+e.getMessage(),e);
// 告知客户端JWT错误1005,需重新登录申请jwt
Message message = new Message().error(1007,"error jwt");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),servletResponse);
return false;
}
}else {
// 请求未携带jwt 判断为无效请求
Message message = new Message().error(1111,"error request");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),servletResponse);
return false;
}
}
protected boolean onAccessDenied(ServletRequest servletRequest, ServletResponse servletResponse) throws Exception {
Subject subject = getSubject(servletRequest,servletResponse);
// 未认证的情况
if (null == subject || !subject.isAuthenticated()) {
// 告知客户端JWT认证失败需跳转到登录页面
Message message = new Message().error(1006,"error jwt");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),servletResponse);
}else {
// 已经认证但未授权的情况
// 告知客户端JWT没有权限访问此资源
Message message = new Message().error(1008,"no permission");
RequestResponseUtil.responseWrite(JSON.toJSONString(message),servletResponse);
}
// 过滤链终止
return false;
}
private boolean isJwtSubmission(ServletRequest request) {
String jwt = RequestResponseUtil.getHeader(request,"authorization");
String appId = RequestResponseUtil.getHeader(request,"appId");
return (request instanceof HttpServletRequest)
&& !StringUtils.isEmpty(jwt)
&& !StringUtils.isEmpty(appId);
}
private AuthenticationToken createJwtToken(ServletRequest request) {
Map maps = RequestResponseUtil.getRequestHeaders(request);
String appId = maps.get("appId");
String ipHost = request.getRemoteAddr();
String jwt = maps.get("authorization");
String deviceInfo = maps.get("deviceInfo");
return new JwtToken(ipHost,deviceInfo,jwt,appId);
}
// 验证当前用户是否属于mappedValue任意一个角色
private boolean checkRoles(Subject subject, Object mappedValue){
String[] rolesArray = (String[]) mappedValue;
return rolesArray == null || rolesArray.length == 0 || Stream.of(rolesArray).anyMatch(role -> subject.hasRole(role.trim()));
}
// 验证当前用户是否拥有mappedValue任意一个权限
private boolean checkPerms(Subject subject, Object mappedValue){
String[] perms = (String[]) mappedValue;
boolean isPermitted = true;
if (perms != null && perms.length > 0) {
if (perms.length == 1) {
if (!subject.isPermitted(perms[0])) {
isPermitted = false;
}
} else {
if (!subject.isPermittedAll(perms)) {
isPermitted = false;
}
}
}
return isPermitted;
}
public void setRedisTemplate(StringRedisTemplate redisTemplate) {
this.redisTemplate = redisTemplate;
}
public void setAccountService(AccountService accountService) {
this.accountService = accountService;
}
}
realm数据源，数据提供service，匹配matchs，自定义token，spring集成shiro配置等其他详见项目代码。
最后项目实现了基于jwt的动态restful api权限认证。
效果展示
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转载请注明 from tomsun28