5.Shrio加密

Shiro授权流程图

image.png

pom文件参见JdbcRealm

• java代码

1.自定义Realm

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.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.crypto.hash.Md5Hash;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.realm.SimpleAccountRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

public class CustomRealm extends AuthorizingRealm {
    //模拟数据库取值操作
    Map<String,String> usermap = new HashMap<>();
    {   //加密与加盐后的值
        usermap.put("Mark","0659c7992e268962384eb17fafe88364");
        super.setName("customRealm");
    }
    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        String userName = (String) principalCollection.getPrimaryPrincipal();
        //从数据库或缓存中获取角色数据
        Set<String> roles = getRolesByUserName(userName);
        Set<String> permissions = getPermissionByUserName(userName);
        SimpleAuthorizationInfo simpleAuthorizationInfo = new SimpleAuthorizationInfo();
        simpleAuthorizationInfo.setRoles(roles);
        simpleAuthorizationInfo.setStringPermissions(permissions);
        return simpleAuthorizationInfo;
    }

    private Set<String> getPermissionByUserName(String userName) {
        Set<String> sets = new HashSet<>();
        sets.add("user:select");
        sets.add("user:delete");
        return sets;
    }

    /**
     * 模拟数据库获取用户角色信息
     * @param userName
     * @return
     */
    private Set<String> getRolesByUserName(String userName) {
        Set<String> sets = new HashSet<>();
        sets.add("admin");
        sets.add("user");
        return sets;
    }

    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        //1.从主体传过来的用户信息中获取用户名
        String userName = (String) authenticationToken.getPrincipal();
        //2.通过用户名到数据库中获取凭证
        String password = getPasswordByUserName(userName);
        if (password == null){
            return null;
        }
        SimpleAuthenticationInfo simpleAuthenticationInfo = new SimpleAuthenticationInfo("Mark",password,"customRealm");
        //将 “盐” 字符串转成ByteSource对象传入simpleAuthenticationInfo内
        simpleAuthenticationInfo.setCredentialsSalt(ByteSource.Util.bytes("abc"));
        return simpleAuthenticationInfo;
    }

    /**
     * 模拟数据库查询凭证
     * @param userName
     * @return
     */
    private String getPasswordByUserName(String userName) {
        return usermap.get(userName);
    }

    public static void main(String[] args) {
        Md5Hash md5Hash = new Md5Hash("123456","abc");
        System.out.println(md5Hash.toString());
    }
}

2.测试类

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.DefaultSecurityManager;
import org.apache.shiro.subject.Subject;
import org.junit.Test;

public class CustomRealmTest {

    @Test
    public void testAuthentication(){
        CustomRealm customRealm = new CustomRealm();

        //1.模拟SecurityManager环境
        DefaultSecurityManager defaultSecurityManager = new DefaultSecurityManager();
        defaultSecurityManager.setRealm(customRealm);

        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
        //设置加密方式
        hashedCredentialsMatcher.setHashAlgorithmName("md5");
        //设置加密次数
        hashedCredentialsMatcher.setHashIterations(1);
        //设置加密对象
        customRealm.setCredentialsMatcher(hashedCredentialsMatcher);

        //2.主体提交请求
        SecurityUtils.setSecurityManager(defaultSecurityManager);
        Subject subject = SecurityUtils.getSubject();
        UsernamePasswordToken token = new UsernamePasswordToken("Mark","123456");
        subject.login(token);
        System.out.println(subject.isAuthenticated());
        subject.checkRoles("admin");
        subject.checkPermissions("user:select","user:delete");
    }
}