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shiro攔截認(rèn)證的全過程記錄

更新時間：2021年11月30日 09:40:59 作者：IM@taoyalong

Apache?Shiro是一個強(qiáng)大且易用的Java安全框架,執(zhí)行身份驗證、授權(quán)、密碼和會話管理,下面這篇文章主要給大家介紹了關(guān)于shiro攔截認(rèn)證的相關(guān)資料,需要的朋友可以參考下

概述

Shiro是apache旗下一個開源安全框架(http://shiro.apache.org/)，它將軟件系統(tǒng)的安全認(rèn)證相關(guān)的功能抽取出來，實現(xiàn)用戶身份認(rèn)證，權(quán)限授權(quán)、加密、會話管理等功能，組成了一個通用的安全認(rèn)證框架。使用shiro就可以非?？焖俚耐瓿烧J(rèn)證、授權(quán)等功能的開發(fā)，降低系統(tǒng)成本。

Shiro框架三大核心對象

說明：

1)Subject :主體對象，負(fù)責(zé)提交用戶認(rèn)證和授權(quán)信息。

2)SecurityManager：安全管理器，負(fù)責(zé)認(rèn)證，授權(quán)等業(yè)務(wù)實現(xiàn)。（核心）

3)Realm：領(lǐng)域?qū)ο?，?fù)責(zé)從數(shù)據(jù)層獲取業(yè)務(wù)數(shù)據(jù)。

shrio 攔截認(rèn)證全過程

?1.FilterRegistrationBean過濾注冊bean

@Bean
public FilterRegistrationBean shiroFilterRegistration() {
    FilterRegistrationBean registration = new FilterRegistrationBean();
    registration.setFilter(new DelegatingFilterProxy("shiroFilter"));
    //該值缺省為false，表示生命周期由SpringApplicationContext管理，設(shè)置為true則表示由ServletContainer管理
    registration.addInitParameter("targetFilterLifecycle", "true");
    registration.setEnabled(true);
    registration.setOrder(Integer.MAX_VALUE - 1);
    registration.addUrlPatterns("/*");
    return registration;
}

設(shè)置過濾的bean

2.shiroFilter 實際過濾配置bean

@Bean("shiroFilter")
public ShiroFilterFactoryBean shirFilter(SecurityManager securityManager) {
    ShiroFilterFactoryBean shiroFilter = new ShiroFilterFactoryBean();
    shiroFilter.setSecurityManager(securityManager);

    //oauth過濾
    Map<String, Filter> filters = new HashMap<>(10);
    filters.put("oauth2", new Oauth2Filter());
    shiroFilter.setFilters(filters);

    Map<String, String> filterMap = new LinkedHashMap<>();
    filterMap.put("/webjars/**", "anon");
    filterMap.put("/druid/**", "anon");
    filterMap.put("/login", "anon");

    filterMap.put("/**", "oauth2");
    shiroFilter.setFilterChainDefinitionMap(filterMap);

    return shiroFilter;
}

配置oauth2Filter為過濾類過濾對象處/webjars/** /druid/** /login 外的所有

3.過濾類Oauth2Filter 繼承 AuthenTicationFilter 重寫以下方法

/**
 * 驗證是否有效token
 * @param request re
 * @param response res
 * @return 驗證token
 * @throws Exception
 */
@Override
protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {
    //獲取請求token，如果token不存在，直接返回401
    String token = getRequestToken((HttpServletRequest) request);
    if(StringUtils.isBlank(token)){
        HttpServletResponse httpResponse = (HttpServletResponse) response;
        httpResponse.setContentType("application/json;charset=utf-8");
        httpResponse.setHeader("Access-Control-Allow-Credentials", "true");
        httpResponse.setHeader("Access-Control-Allow-Origin", HttpContextUtils.getOrigin());

        String json = new Gson().toJson(new Result().error(ErrorCode.UNAUTHORIZED));

        httpResponse.getWriter().print(json);

        return false;
    }

    return executeLogin(request, response);
}

4.調(diào)用父類 executeLogin 進(jìn)行登錄驗證

protected boolean executeLogin(ServletRequest request, ServletResponse response) throws Exception {
    AuthenticationToken token = this.createToken(request, response);
    if (token == null) {
        String msg = "createToken method implementation returned null. A valid non-null AuthenticationToken must be created in order to execute a login attempt.";
        throw new IllegalStateException(msg);
    } else {
        try {
            Subject subject = this.getSubject(request, response);
            subject.login(token);
            return this.onLoginSuccess(token, subject, request, response);
        } catch (AuthenticationException var5) {
            return this.onLoginFailure(token, var5, request, response);
        }
    }
}

5.subject.login(token); 進(jìn)行登錄

login方法被DelegatingSubject重寫

public void login(AuthenticationToken token) throws AuthenticationException {
    **
    Subject subject = this.securityManager.login(this, token);
    **
}

6.securityManager.login(this, token) login被DefaultSecurityManager

接下來幾步?jīng)]那么重要省略部分

7.ModularRealmAuthenticator AuthenticationInfo 授權(quán)信息獲取方法

protected AuthenticationInfo doAuthenticate(AuthenticationToken authenticationToken) throws AuthenticationException {
    this.assertRealmsConfigured();
    Collection<Realm> realms = this.getRealms();
    return realms.size() == 1 ? this.doSingleRealmAuthentication((Realm)realms.iterator().next(), authenticationToken) : this.doMultiRealmAuthentication(realms, authenticationToken);
}

getRealms 獲取我們自己重寫的Realms類，主要用戶獲取用戶信息

8.接下來則進(jìn)入我們自己寫的Realms類我的類叫Oauth2Realm

/**
 * 認(rèn)證(登錄時調(diào)用)
 */
@Override
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
    String accessToken = (String) token.getPrincipal();

    //根據(jù)accessToken，查詢用戶信息
    SysUserTokenEntity tokenEntity = shiroService.getByToken(accessToken);
    //token失效
    if(tokenEntity == null || tokenEntity.getExpireDate().getTime() < System.currentTimeMillis()){
        throw new IncorrectCredentialsException(MessageUtils.getMessage(ErrorCode.TOKEN_INVALID));
    }

    //查詢用戶信息
    SysUserEntity userEntity = shiroService.getUser(tokenEntity.getUserId());

    //轉(zhuǎn)換成UserDetail對象
    UserDetail userDetail = ConvertUtils.sourceToTarget(userEntity, UserDetail.class);

    //獲取用戶對應(yīng)的部門數(shù)據(jù)權(quán)限
    List<Long> deptIdList = shiroService.getDataScopeList(userDetail.getId());
    userDetail.setDeptIdList(deptIdList);

    //賬號鎖定
    if(userDetail.getStatus() == 0){
        throw new LockedAccountException(MessageUtils.getMessage(ErrorCode.ACCOUNT_LOCK));
    }

    SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(userDetail, accessToken, getName());
    return info;
}

負(fù)責(zé)獲取用戶信息的方法

這并不是登錄的過程，而是授權(quán)過濾的過程，通過token到數(shù)據(jù)庫查詢是否有這個用戶，且沒有過期，則證明已經(jīng)登錄。