shiro加密算法
2019-08-16 11:22:40来源:博客园 阅读 ()
shiro加密算法
第一节的时候我介绍过,shiro有很多加密算法,如md5和sha,而且还支持加盐,使得密码的解析变得更有难度,更好的保障了数据的安全性。
这里我们要介绍的是md5算法,因为比较常用。首先我们来看看md5算法的各种实现方式:
package com.wujianwu.test; import org.apache.shiro.crypto.hash.Md5Hash; import org.apache.shiro.crypto.hash.SimpleHash; public class TestMd5 { public static void main(String[] args) { String password = "123456";//要加密的字符串 String salt = "wjw";//盐 Integer hashIterations = 2;//散列次数 //1.不加盐的md5 Md5Hash md5 = new Md5Hash(password); System.out.println(md5.toString()); //2.加盐的md5 md5 = new Md5Hash(password, salt); System.out.println(md5.toString()); //3.加盐再设置散列次数的md5 md5 = new Md5Hash(password, salt, hashIterations); System.out.println(md5.toString()); //4.利用SimpleHash来设置md5(上面三种都可以通过这个来设置,这里举例加盐加散列次数的) //第一个参数是算法名称,这里指定md5,第二个是要加密的密码,第三个参数是加盐,第四个是散列次数 SimpleHash hash = new SimpleHash("md5", password, salt,hashIterations); System.out.println(hash.toString()); } }
上面列举了md5算法的各种实现,包括不加盐的,加盐的,加盐加散列次数的(从HashedCredentialsMatcher的源码可得知,默认散列次数为1),还有通过SimpleHash来实现md5的方式,下面看看它们的输出:
输出信息:
e10adc3949ba59abbe56e057f20f883e
7ca5a3bfd6fc151442219490509cb4d8
3d80e8a34ae898c07d3fb237bae26b7d
3d80e8a34ae898c07d3fb237bae26b7d
可以看到,不加盐、加盐、加盐加散列次数后的加密字段是不一样的,而它们的数据安全性也是递增的!但是注意散列次数不能设置过大,否则运行效率会变低。下面讲讲加密算法在realm中的应用。
一般我们在数据库保存的用户密码都是经过加密后的密码,所以我们想把加密后的用户信息传给shiro进行认证,就必须把该密码加密的算法、添加的盐以及散列的次数告诉shiro,因此我们需要配置realm里面的凭证匹配器credentialsMatcher,当用户将账号密码输进来时,shiro就会根据我们设置的加密规则对密码进行加密加盐,然后与realm中查询封装好的数据库数据进行比对认证。
public abstract class AuthenticatingRealm extends CachingRealm implements Initializable { //TODO - complete JavaDoc private static final Logger log = LoggerFactory.getLogger(AuthenticatingRealm.class); private static final AtomicInteger INSTANCE_COUNT = new AtomicInteger(); /** * The default suffix appended to the realm name used for caching authentication data. * * @since 1.2 */ private static final String DEFAULT_AUTHORIZATION_CACHE_SUFFIX = ".authenticationCache"; /** * Credentials matcher used to determine if the provided credentials match the credentials stored in the data store. */ private CredentialsMatcher credentialsMatcher;
下面我们开始配置凭证匹配器:
shiro.ini:
[main] #配置散列算法,用于用户输入身份和密码后进行加密然后与数据库数据比对 credentialsMatcher=org.apache.shiro.authc.credential.HashedCredentialsMatcher credentialsMatcher.hashAlgorithmName=md5 credentialsMatcher.hashIterations=2 dataSource=com.mchange.v2.c3p0.ComboPooledDataSource dataSource.driverClass=com.mysql.jdbc.Driver dataSource.jdbcUrl=jdbc:mysql://localhost:3306/test dataSource.user=root dataSource.password=root myRealm=com.wujianwu.realm.MyRealm myRealm.credentialsMatcher=$credentialsMatcher myRealm.dataSource=$dataSource securityManager.realm=$myRealm
我们设置了一个凭证匹配器HashedCredentialsMatcher,然后再设置它里面的相关属性,如算法名称为md5,散列次数是两次,然后将设置好的凭证匹配器赋予我们自定义的realm,再修改一下我们的realm的部分代码,将数据库中的盐查询出来,并调用SimpleAuthenticationInfo的带有盐参数的构造方法来封装数据库查出来的用户数据(其实就是告诉shiro要比对的是加密后的信息),以下为新的myRealm:
package com.wujianwu.realm; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import javax.sql.DataSource; import org.apache.shiro.authc.AuthenticationException; import org.apache.shiro.authc.AuthenticationInfo; import org.apache.shiro.authc.AuthenticationToken; import org.apache.shiro.authc.SimpleAuthenticationInfo; import org.apache.shiro.authc.credential.CredentialsMatcher; import org.apache.shiro.authz.AuthorizationInfo; import org.apache.shiro.crypto.hash.SimpleHash; import org.apache.shiro.realm.AuthorizingRealm; import org.apache.shiro.subject.PrincipalCollection; import org.apache.shiro.util.ByteSource; import com.wujianwu.bean.User; public class MyRealm extends AuthorizingRealm{ private DataSource dataSource; @Override public String getName() { // TODO Auto-generated method stub return "myRealm"; } @Override protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException { String userName = (String) token.getPrincipal(); SimpleAuthenticationInfo info = null; User user = getUserInfo(userName); System.out.println("用户加密后的密码"+user.getPassword()+"=============="); info = new SimpleAuthenticationInfo(userName, user.getPassword(), ByteSource.Util.bytes(user.getPasswordSalt()), getName()); return info; } @Override protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection arg0) { // TODO Auto-generated method stub return null; } public DataSource getDataSource() { return dataSource; } public void setDataSource(DataSource dataSource) { this.dataSource = dataSource; } /** * 根据用户名从数据库查询出用户信息 * @param username * @return */ private User getUserInfo(String username){ User user = new User(); String sql = "select username,password,password_salt from users where username=?"; Connection connection = null; PreparedStatement statement = null; ResultSet set = null; try { connection = dataSource.getConnection(); statement = connection.prepareStatement(sql); statement.setString(1, username); set = statement.executeQuery(); if(set.next()) { String username1 = set.getString(1); String password = set.getString(2); String salt = set.getString(3); user.setPassword(password); user.setUsername(username1); user.setPasswordSalt(salt); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally { closeAll(connection, set, statement); } return user; } /** * 关闭资源 * @param conn * @param set * @param statement */ private void closeAll(Connection conn,ResultSet set,PreparedStatement statement) { try { if(set != null) { set.close(); } if(statement != null) { statement.close(); } if(conn != null) { conn.close(); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
注意SimpleAuthenticationInfo构造函数中的盐是ByteSource类型的,因此我们需要用接口ByteSource中的静态内部类Util下的bytes(String str)方法来将我们的盐转换成ByteSource类型。
设置好凭证匹配器,改好自定义的Realm,下面我们开始测试,还是熟悉的流程:
package com.wujianwu.test; import org.apache.shiro.SecurityUtils; import org.apache.shiro.authc.AuthenticationException; import org.apache.shiro.authc.UsernamePasswordToken; import org.apache.shiro.config.IniSecurityManagerFactory; import org.apache.shiro.crypto.hash.Md5Hash; import org.apache.shiro.crypto.hash.SimpleHash; import org.apache.shiro.mgt.SecurityManager; import org.apache.shiro.subject.Subject; import org.apache.shiro.util.Factory; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class TestMyRealm { private static final Logger logger = LoggerFactory.getLogger(TestMyRealm.class); public static void main(String[] args) { Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini"); SecurityManager securityManager = factory.getInstance(); SecurityUtils.setSecurityManager(securityManager); Subject subject = SecurityUtils.getSubject(); UsernamePasswordToken token = new UsernamePasswordToken("zhangsan", "123456"); try { subject.login(token); if(subject.isAuthenticated()) { logger.info("用户登录认证成功"); } } catch (AuthenticationException e) { // TODO Auto-generated catch block e.printStackTrace(); logger.error("用户名或者密码错误,登录失败"); } } }
数据库的数据:
运行完控制台输出如下:
2019-07-28 19:59:30,535 INFO [com.mchange.v2.log.MLog] - MLog clients using slf4j logging. 2019-07-28 19:59:30,963 INFO [com.mchange.v2.c3p0.C3P0Registry] - Initializing c3p0-0.9.5.2 [built 08-December-2015 22:06:04 -0800; debug? true; trace: 10] 2019-07-28 19:59:31,055 INFO [org.apache.shiro.config.IniSecurityManagerFactory] - Realms have been explicitly set on the SecurityManager instance - auto-setting of realms will not occur. 2019-07-28 19:59:31,085 INFO [com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource] - Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, contextClassLoaderSource -> caller, dataSourceName -> 2zm2h7a4fnv3mn329o49|180bc464, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> com.mysql.jdbc.Driver, extensions -> {}, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, forceSynchronousCheckins -> false, forceUseNamedDriverClass -> false, identityToken -> 2zm2h7a4fnv3mn329o49|180bc464, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:mysql://localhost:3306/test, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 15, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 3, numHelperThreads -> 3, preferredTestQuery -> null, privilegeSpawnedThreads -> false, properties -> {user=******, password=******}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ] 用户加密后的密码3d80e8a34ae898c07d3fb237bae26b7d============== 2019-07-28 19:59:31,399 INFO [org.apache.shiro.session.mgt.AbstractValidatingSessionManager] - Enabling session validation scheduler... 2019-07-28 19:59:31,405 INFO [com.wujianwu.test.TestMyRealm] - 用户登录认证成功
可以看到,我们模拟的用户输入的账号是zhangsan,密码是123456,但数据库中的密码是加密加盐后的密码,所以我们给realm配置了加密算法的规则,让它将我们传过去的密码进行了同样的加密加盐(这里盐不需要我们设置,是从数据库中查询出来的),然后再和数据库的数据进行比对认证,因此这里认证是成功的(123456进行md5加密和wjw加盐后然后再散列2次就是这一串东西了:3d80e8a34ae898c07d3fb237bae26b7d,至于内部如何实现,有兴趣的大佬可以去看一下《算法》这本书= =)
以上就是散列算法(加密算法)在shiro中的使用Demo,如果有什么补充或者修改的请在评论区留言,谢谢!
原文链接:https://www.cnblogs.com/wujianwu/p/11260732.html
如有疑问请与原作者联系
标签:
版权申明:本站文章部分自网络,如有侵权,请联系:west999com@outlook.com
特别注意:本站所有转载文章言论不代表本站观点,本站所提供的摄影照片,插画,设计作品,如需使用,请与原作者联系,版权归原作者所有
- DES/3DES/AES 三种对称加密算法实现 2020-06-11
- 终于有人把最适合学习算法的书单找出来了,面试必备! 2020-06-03
- 基础排序算法(附加java实现) 2020-06-02
- 终于有人把最适合学习算法的书单找出来了,面试必备! 2020-05-29
- Spring Boot加密配置文件特殊内容 2020-05-29
IDC资讯: 主机资讯 注册资讯 托管资讯 vps资讯 网站建设
网站运营: 建站经验 策划盈利 搜索优化 网站推广 免费资源
网络编程: Asp.Net编程 Asp编程 Php编程 Xml编程 Access Mssql Mysql 其它
服务器技术: Web服务器 Ftp服务器 Mail服务器 Dns服务器 安全防护
软件技巧: 其它软件 Word Excel Powerpoint Ghost Vista QQ空间 QQ FlashGet 迅雷
网页制作: FrontPages Dreamweaver Javascript css photoshop fireworks Flash