对web项目数据库user pwd实行加密

对web项目数据库user pwd实行加密

思路：1.写properties配置文件，导入el变量
2.加密properties文件user,pwd
3.在spring加载器解密

1.jdbc.properties配置文件

driverClassName=oracle.jdbc.driver.OracleDriver
url=MyuOSAj6tbjyR9+19rwt9bGkRwEVfqUIYYdzeYgYtbiGRTn8GG
#username=加密后user
#password=加密后pwd
username=WnplV/ietfQ=
password=QAHlVoUc49w=

2.applicationContext.xml配置文件

<bean id="propertyConfig"    class="com.spring.util.PropertyPlaceholderConfigurerExt">
    
         <property name="locations">
         <list>
         <value>classpath*:jdbc.propertiesvalue>
        list>
         property>
 bean>

<property name="driverClass" value="${driverClassName}" />
<property name="jdbcUrl" value="${url}" />
<property name="user" value="${username}" />
<property name="password" value="${password}" />   

3.1加密算法
使用DEC可逆加密方式，导入 sun.misc.BASE64Decoder.jar
DECUtils.java加密文件

package com.spring.util;

import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class DESUtils {

    private static Key key;
    private static String KEY_STR = "myKey";// 密钥
    private static String CHARSETNAME = "UTF-8";// 编码
    private static String ALGORITHM = "DES";// 加密类型


    static {
        try {
            KeyGenerator generator = KeyGenerator.getInstance(ALGORITHM);
            generator.init(new SecureRandom(KEY_STR.getBytes()));
            key = generator.generateKey();
            generator = null;
        } catch (Exception e) {
            // TODO: handle exception
            throw new RuntimeException(e);
        }
    }

    /**
     * 对str进行DES加密
     * 
     * @param str
     * @return
     */
    public static String getEncryptString(String str) {
        BASE64Encoder base64encoder = new BASE64Encoder();
        try {
            byte[] bytes = str.getBytes(CHARSETNAME);
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] doFinal = cipher.doFinal(bytes);
            return base64encoder.encode(doFinal);
        } catch (Exception e) {
            // TODO: handle exception
            throw new RuntimeException(e);
        }
    }

    /**
     * 对str进行DES解密
     * 
     * @param str
     * @return
     */
    public static String getDecryptString(String str) {
        BASE64Decoder base64decoder = new BASE64Decoder();
        try {
            byte[] bytes = base64decoder.decodeBuffer(str);
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, key);
            byte[] doFinal = cipher.doFinal(bytes);
            return new String(doFinal, CHARSETNAME);
        } catch (Exception e) {
            // TODO: handle exception
            throw new RuntimeException(e);
        }
    }

}

3.2 重写spring加载器
PropertyPlaceholderConfigurerExt.java

package com.spring.util;

import java.util.Properties;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;

public class PropertyPlaceholderConfigurerExt extends PropertyPlaceholderConfigurer{

    /**
     * 
     * 重写spring加载器  载入自定义参数
     * */

    @Override
    protected void processProperties(ConfigurableListableBeanFactory beanFactory, Properties props)
                    throws BeansException {
            String url = props.getProperty("url");
            String username = props.getProperty("username");
            String password = props.getProperty("password");
            if (password != null && username != null) {
                    //解密jdbc.password属性值，并重新设置
                    props.setProperty("url", DESUtils.getDecryptString(url));
                    props.setProperty("username", DESUtils.getDecryptString(username));
                    props.setProperty("password", DESUtils.getDecryptString(password));
            }
            super.processProperties(beanFactory, props);

    } 
}

以上

—2017/02/14更新
发现一个新问题，当整合MyBatis时，加密数据key解析失败 并报错505Connections could not be acquired from the underlying database!

解决方案：更改mapper bean的property 因为之前的写法在初始化时就加载url,user,pwd

 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="up.dao">property>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        
        
    bean>

以上