有具体问题的可以参考之前的关于shiro的博文，关于shiro的博文均是一次工程的内容
密码的比对
通过AuthenticatingRealm的CredentialsMatcher方法
密码的加密，主要是在CredentialsMatcher的....
密码的MD5加密
数据表中保存的密码，不应该是明文的，而且不能反推得到密码
1.如何把一个字符串加密成MD5
使用其提供的接口实现
2.替换当前的Realm的CredentialsMatcher属性，直接使用HashedCredentialsMatcher对象，
并且设置加密算法
applicatonContext.xml文件中
<!--3.配置Realm3.1直接实现Realm接口的bean--><bean id="jdbcRealm" class="com.MrChengs.shiro.realms.ShiroRealm"><property name="credentialsMatcher"><bean class="org.apache.shiro.authc.credential.HashedCredentialsMatcher"><!-- 加密的方法 --><property name="hashAlgorithmName" value="MD5"></property><!-- 指定加密的次数 --><property name="hashIterations" value="20"></property></bean></property></bean>
看源码：
public SimpleHash(String algorithmName, Object source, Object salt, int hashIterations)throws CodecException, UnknownAlgorithmException {if (!StringUtils.hasText(algorithmName)) {throw new NullPointerException("algorithmName argument cannot be null or empty.");}this.algorithmName = algorithmName;this.iterations = Math.max(DEFAULT_ITERATIONS, hashIterations);ByteSource saltBytes = null;if (salt != null) {saltBytes = convertSaltToBytes(salt);this.salt = saltBytes;}ByteSource sourceBytes = convertSourceToBytes(source);hash(sourceBytes, saltBytes, hashIterations);}
测试加密：
public static void main(String[] args) {String hash="MD5";Object cred = "123456";Object salt = null;int hashInter = 1024;//加密的类System.out.println(new SimpleHash(hash, cred, salt, hashInter));}
fc1709d0a95a6be30bc5926fdb7f22f4
MD5盐值加密
假设两个人原始密码一致,这样也会更加安全
所以此时需要使用到盐值
步骤：
在doGetAuthenticationInfo的方法返回值创建SimpleAuthenticationInfo对象的时候
使用SimpleAuthenticationInfo(principal, credentials, credentialsSalt, realmName);
//盐值ByteSource credentialsSalt = ByteSource.Util.bytes(username);
使用ByteSource.Util.bytes（）来计算盐值
盐值需要唯一一般使用随机字符串或userid
使用 new SimpleHash(algorithmName, source, salt, hashIterations)计算盐值解密后的盐值
此时放置的不在是明文的密码
ShiroRealm.java
//6.根据用户的情况来构建AuthenticationInfo并且返回//以下信息是从数据库中获取的//principal：认证的实体信息，可以是username，也可以是数据表对应的实体对象Object principal = username;//credentials:密码Object credentials = null;if("user".equals(username)){//计算后user密码为123456的盐值credentials = "2044dc18864ca3bc408359a0fb13c2a7";}else if("admin".equals(username)){//计算和admin密码为123456的盐值credentials = "30beaf2a87d54ebe889cfccc076247ad"; } //realmName:当前realm对象为name，调用父类的getName()方法即可String realmName = getName();//盐值 ByteSource credentialsSalt = ByteSource.Util.bytes(username);SimpleAuthenticationInfo info = null;//new SimpleAuthenticationInfo(principal, credentials, realmName);info = new SimpleAuthenticationInfo(principal, credentials, credentialsSalt, realmName);return info;}
盐值的计算：
public static void main(String[] args) {String hash="MD5";Object cred = "123456";Object salt = "admin";int hashInter = 20;//加密的类System.out.println(new SimpleHash(hash, cred, salt, hashInter));//new SimpleHash(algorithmName, source, salt, hashIterations)}
在测试中，只有用户名为user/admin 密码为123456才能成功登陆
多Realm
创建新的类
SecondRealm。java
public class SecondRealm extends AuthenticatingRealm {@Overrideprotected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken arg0) throws AuthenticationException {System.out.println("SecondRealm-->");//1.把AuthenticationToken转为UsernamePasswordTokenUsernamePasswordToken upToken = (UsernamePasswordToken) arg0;//2.从UsernamePasswordToken获取usernameString username = upToken.getUsername();//3.调用数据库的方法，从数据库查询username对应的用户记录System.out.println("从数据库中获取username：" + username);//4.若用户不存在可以抛出异常 UnKnownAccountException异常if("unknow".equals(username)){throw new UnknownAccountException("username 不存在");}//5.根据用户信息的清空决定是否需要抛出其他的异常if("monster".equals(username)){throw new LockedAccountException("用户被锁定");}//6.根据用户的情况来构建AuthenticationInfo并且返回//以下信息是从数据库中获取的//principal：认证的实体信息，可以是username，也可以是数据表对应的实体对象Object principal = username;//credentials:密码Object credentials = null;if("user".equals(username)){credentials = "6e3be0247455b9298f47eac8e57a07214ef84115";}else if("admin".equals(username)){credentials = "ff9633d047eaaf9861984ed86e5f73f904647716";}//realmName:当前realm对象为name，调用父类的getName()方法即可String realmName = getName();//盐值ByteSource credentialsSalt = ByteSource.Util.bytes(username);SimpleAuthenticationInfo info = null;//new SimpleAuthenticationInfo(principal, credentials, realmName);info = new SimpleAuthenticationInfo(principal, credentials, credentialsSalt, realmName);return info;}public static void main(String[] args) { String hash="SHA1";Object cred = "123456";Object salt = "user";int hashInter = 20;//加密的类System.out.println(new SimpleHash(hash, cred, salt, hashInter));//new SimpleHash(algorithmName, source, salt, hashIterations) }}
加密方式是SHA1
在applicationContext.xml
需要注释一个
<!--1.配置SecurityManager--><bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager"><property name="cacheManager" ref="cacheManager"/> <!-- 此时这个属性需要注释使用下面的属性配置<property name="realm" ref="jdbcRealm"/>--><property name="authenticator" ref="autheniicator"></property></bean>
<!-- 认证器 --><bean id="autheniicator" class="org.apache.shiro.authc.pam.ModularRealmAuthenticator"><property name="realms"><list><ref bean="jdbcRealm"/><ref bean="SecondRealm"/></list></property></bean><!--3.配置Realm3.1直接实现Realm接口的bean--><bean id="jdbcRealm" class="com.MrChengs.shiro.realms.ShiroRealm"><property name="credentialsMatcher"><bean class="org.apache.shiro.authc.credential.HashedCredentialsMatcher"><!-- 加密的方法 --> <property name="hashAlgorithmName" value="MD5"></property><!-- 指定加密的次数 --><property name="hashIterations" value="20"></property></bean></property></bean><bean id="SecondRealm" class="com.MrChengs.shiro.realms.SecondRealm"><property name="credentialsMatcher"><bean class="org.apache.shiro.authc.credential.HashedCredentialsMatcher"><!-- 加密的方法 --><property name="hashAlgorithmName" value="SHA1"></property><!-- 指定加密的次数 --><property name="hashIterations" value="20"></property></bean></property></bean>
执行的顺序和list的顺序有关
<bean id="autheniicator" class="org.apache.shiro.authc.pam.ModularRealmAuthenticator"><property name="realms"> <list><ref bean="jdbcRealm"/><ref bean="SecondRealm"/></list></property></bean>
