package com.github.zhangkaitao.shiro.chapter21.credentials;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.ExcessiveAttemptsException;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.cache.Cache;
import org.apache.shiro.cache.CacheManager;
import java.util.concurrent.atomic.AtomicInteger;
/**
* <p>User: Zhang Kaitao
* <p>Date: 14-1-28
* <p>Version: 1.0
*/
public class RetryLimitHashedCredentialsMatcher extends HashedCredentialsMatcher {
private Cache<String, AtomicInteger> passwordRetryCache;
public RetryLimitHashedCredentialsMatcher(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(retryCount == null) {
retryCount = new AtomicInteger(0);
passwordRetryCache.put(username, retryCount);
}
if(retryCount.incrementAndGet() > 5) {
//if retry count > 5 throw
throw new ExcessiveAttemptsException();
}
boolean matches = super.doCredentialsMatch(token, info);
if(matches) {
//clear retry count
passwordRetryCache.remove(username);
}
return matches;
}
}