Springboot（2.0）整合shiro 配置EnCache，remember me和密码校验次数

#Springboot（2.0）整合shiro 配置EnCache，remember me和密码校验次数
配置时，请先阅读springboot整合shiro文章，
项目github地址：https://github.com/Plumblumpb/springboot-2.0--shiro.git
##encache
由于每次的授权shiro都会重新范围数据库，导致查询频繁所以使用EnCache进行缓存
重点：记得将要缓存的类序列化
###1.1配置maven

		
		
			org.springframework.boot
			spring-boot-starter-cache
		
		
		
			net.sf.ehcache
			ehcache
		

###1.2配置shirConfig

    @Bean
    public EhCacheManager ehCacheManager(){
        EhCacheManager cacheManager = new EhCacheManager();
        cacheManager.setCacheManagerConfigFile("classpath:config/ehcache.xml");
        return cacheManager;
    }

    @Bean
    public SecurityManager securityManager(){
        DefaultWebSecurityManager securityManager =  new DefaultWebSecurityManager();
        //设置Realm，用于获取认证凭证
        securityManager.setRealm(userRealm());
        //注入缓存管理器
        securityManager.setCacheManager(ehCacheManager());
        //注入Cookie(记住我)管理器(remenberMeManager)
        securityManager.setRememberMeManager(rememberMeManager());
        return securityManager;
    }

###1.3配置EnCached.xml
（具体看github，这个不全）

##remember me
###1.1配置shiroConfig

@Bean
    public SimpleCookie rememberMeCookie(){
        //这个参数是cookie的名称，对应前端的checkbox的name = rememberMe
        SimpleCookie simpleCookie = new SimpleCookie("rememberMe");
        //如果httyOnly设置为true，则客户端不会暴露给客户端脚本代码，使用HttpOnly cookie有助于减少某些类型的跨站点脚本攻击；
        simpleCookie.setHttpOnly(true);
        //记住我cookie生效时间,默认30天 ,单位秒：60 * 60 * 24 * 30
        simpleCookie.setMaxAge(259200);

        return simpleCookie;
    }

    /**
     * cookie管理器;
     * @return
     */
    @Bean
    public CookieRememberMeManager rememberMeManager(){
        CookieRememberMeManager cookieRememberMeManager = new CookieRememberMeManager();
        //rememberme cookie加密的密钥 建议每个项目都不一样 默认AES算法 密钥长度（128 256 512 位），通过以下代码可以获取
        //KeyGenerator keygen = KeyGenerator.getInstance("AES");
        //SecretKey deskey = keygen.generateKey();
        //System.out.println(Base64.encodeToString(deskey.getEncoded()));
        byte[] cipherKey = Base64.decode("wGiHplamyXlVB11UXWol8g==");
        cookieRememberMeManager.setCipherKey(cipherKey);
        cookieRememberMeManager.setCookie(rememberMeCookie());
        return cookieRememberMeManager;
    }

并加入securityManager

###1.2配置Controller

##密码校验次数
###1.2配置RetryLimitCredentialsMatcher
继承HashedCredentialsMatcher，并修改密码验证的流程

/**
 * @Auther: cpb
 * @Date: 2018/8/14 11:09
 * @Description:
 */
public class RetryLimitCredentialsMatcher extends  HashedCredentialsMatcher {

    private static final Logger logger = LoggerFactory.getLogger(RetryLimitCredentialsMatcher.class);

    //集群中可能会导致出现验证多过5次的现象，因为AtomicInteger只能保证单节点并发
    private Cache passwordRetryCache;

    //最大校验次数。
    private int maxRetryCount = 3;


    public RetryLimitCredentialsMatcher(CacheManager cacheManager) {
        passwordRetryCache = cacheManager.getCache("passwordRetryCache");
    }


    @Override
    public boolean doCredentialsMatch(AuthenticationToken token, AuthenticationInfo info) {
        String username = (String) token.getPrincipal();
        //retry count + 1
        AtomicInteger retryCount = passwordRetryCache.get(username);
        if (null == retryCount) {
            retryCount = new AtomicInteger(0);
            passwordRetryCache.put(username, retryCount);
        }
        if (retryCount.incrementAndGet() > 3) {
            logger.warn("用户: " + username + " tried to login more than 3 times in period");
            throw new ExcessiveAttemptsException("用户名: " + username + " tried to login more than 3 times in period"
            );
        }
        boolean matches = super.doCredentialsMatch(token, info);
        if (matches) {
            //clear retry data
            passwordRetryCache.remove(username);
        }
        return matches;
    }
}

###1.2配置shiroConfig

    /**
     * 凭证匹配器
     * （由于我们的密码校验交给Shiro的SimpleAuthenticationInfo进行处理了
     * ）
     * @return
     */
    @Bean
    public HashedCredentialsMatcher hashedCredentialsMatcher(){
//        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
        HashedCredentialsMatcher hashedCredentialsMatcher = new RetryLimitCredentialsMatcher(ehCacheManager());
        hashedCredentialsMatcher.setHashAlgorithmName("md5");//散列算法:这里使用MD5算法;
        hashedCredentialsMatcher.setHashIterations(2);//散列的次数，比如散列两次，相当于 md5(md5(""));
        return hashedCredentialsMatcher;
    }