Shiro的认证过程

这篇文章主要讲解了“Shiro的认证过程”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“Shiro的认证过程”吧！

Shiro的架构了解之后，走一下debug，跟一下认证的流程。使用Realm来认证用户名密码。

使用realm访问数据库里的数据

获取当前的subject

校验subject是否已经登录

若没有认证则封装用户名密码

1.0创建表单页面存储提交

2.0请求提交到mvc的handler

3.0获取用户名密码

4.0执行登录：调用subject的login(token)

5.0自定义realm，从数据库获取对应记录，返回给shiro

Realm实现类AuthenticatingRealm

Shiro的认证过程

protected abstract AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken var1) throws AuthenticationException;

实现该方法

6.0Shiro完成对密码的比对

currentUser.login(token);login方法的实现void login(AuthenticationToken var1) throws AuthenticationException;

向下走，看下实现

public void login(AuthenticationToken token) throws AuthenticationException { this.clearRunAsIdentitiesInternal(); Subject subject = this.securityManager.login(this, token); String host = null; PrincipalCollection principals; if (subject instanceof DelegatingSubject) { DelegatingSubject delegating = (DelegatingSubject)subject; principals = delegating.principals; host = delegating.host; } else { principals = subject.getPrincipals(); }
if (principals != null && !principals.isEmpty()) { this.principals = principals; this.authenticated = true; if (token instanceof HostAuthenticationToken) { host = ((HostAuthenticationToken)token).getHost(); }
if (host != null) { this.host = host; }
Session session = subject.getSession(false); if (session != null) { this.session = this.decorate(session); } else { this.session = null; }
} else { String msg = "Principals returned from securityManager.login( token ) returned a null or empty value. This value must be non null and populated with one or more elements."; throw new IllegalStateException(msg); }} info = this.authenticate(token);
public AuthenticationInfo authenticate(AuthenticationToken token) throws AuthenticationException { return this.authenticator.authenticate(token);}

最终调用的

==============public final AuthenticationInfo getAuthenticationInfo(AuthenticationToken token) throws AuthenticationException { AuthenticationInfo info = this.getCachedAuthenticationInfo(token); if (info == null) { info = this.doGetAuthenticationInfo(token); log.debug("Looked up AuthenticationInfo [{}] from doGetAuthenticationInfo", info); if (token != null && info != null) { this.cacheAuthenticationInfoIfPossible(token, info); } } else { log.debug("Using cached authentication info [{}] to perform credentials matching.", info); }
if (info != null) { this.assertCredentialsMatch(token, info); } else { log.debug("No AuthenticationInfo found for submitted AuthenticationToken [{}]. Returning null.", token); }
return info;} int i = token.hashCode();此时的hashcode与 info = this.doGetAuthenticationInfo(token);doGetAuthenticationInfo获取的token是一致的

但是会由于缓存不能达到登录后在返回同样验证的效果

Shiro如何比对密码

token中保存了从数据库获取的密码以及从前台传过来的密码

然后进行比对

密码的比对

public boolean doCredentialsMatch(AuthenticationToken token, AuthenticationInfo info) { Object tokenCredentials = getCredentials(token); Object accountCredentials = getCredentials(info); return equals(tokenCredentials, accountCredentials);}public void setCredentialsMatcher(CredentialsMatcher credentialsMatcher) { this.credentialsMatcher = credentialsMatcher;}

Shiro的认证过程