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Shiro的认证过程

发表于：2025-01-31 作者：千家信息网编辑

千家信息网最后更新 2025年01月31日，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deb

千家信息网最后更新 2025年01月31日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

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;}