使用自定义DES加密方式加密配置文件中配置信息

1.配置文件中采用DES()形式

application.properties中使用DES()，括号中使用加密后的信息

jdbc.url = DES(SDFKLJDFKLJDLK1244KKLHKJHKASJDF343HJKHKJDSFDSF3124324)

jdbc.user = DES(SDNFKJDNFKDNFKNK324324KJ3B4JKB3KJ32K4J3B2KJ4B3KJB4KJ32)

jdbc.password = DES(HK23H4K3J2H4KJ32H4KJ32H4KL32H4KJL32H4KJL32H4JK32H4K3L4H)

2.使用

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.Security;

public class DESEncryptUtil
{
private static final String Algorithm = "DES"; //定义 加密算法,可用 DES,DESede,Blowfish
static String strKey = "123456";
//src为被加密的数据缓冲区（源）
public static byte[] encryptMode(byte[] keybyte, byte[] src) {
try {
//生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);
//加密
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.ENCRYPT_MODE, deskey);
return c1.doFinal(src);
}
catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
}
catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
}
catch (Exception e3) {
e3.printStackTrace();
}
return null;
}

//keybyte为加密密钥，长度为24字节
//src为加密后的缓冲区
public static byte[] decryptMode(byte[] keybyte, byte[] src) {
try {
//生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);
//解密
Cipher c1 = Cipher.getInstance(Algorithm);
c1.init(Cipher.DECRYPT_MODE, deskey);
return c1.doFinal(src);
}
catch (java.security.NoSuchAlgorithmException e1) {
e1.printStackTrace();
}
catch (javax.crypto.NoSuchPaddingException e2) {
e2.printStackTrace();
}
catch (Exception e3) {
e3.printStackTrace();
}
return null;
}
//转换成十六进制字符串
public static String byte2hex(byte[] b) {
String hs="";
String stmp="";
for (int n=0;n

 加密方式可以选择自己想要的加密方式，也可以自定义括号的前缀信息DES等。

3.项目启动运行时解密配置文件

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanInitializationException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;

import java.util.Properties;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
* 配置文件加解密 以DES(...)包括起来的数据是已经加密的数据 通过这个工具会被解密
*/
public class DecryptPropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
private Logger logger = LoggerFactory.getLogger(DecryptPropertyPlaceholderConfigurer.class);

private static Pattern pattern = Pattern.compile("^DES\\((.*)\\)$");
@Override
protected void processProperties(ConfigurableListableBeanFactory beanFactory, Properties props) throws BeansException {
try {
Set propertyNamesSet = props.stringPropertyNames();
for (String propertyName : propertyNamesSet) {
String propertyValue = props.getProperty(propertyName);
if(propertyValue == null) {
continue;
}
Matcher matcher = pattern.matcher(propertyValue);
if(matcher.matches() && matcher.groupCount() == 1) {
String desValue = matcher.group(1);
String originalValue = DESEncryptUtil.Decrypt(desValue, DESEncryptUtil.hex2byte(DESEncryptUtil.strKey));
props.setProperty(propertyName, originalValue);
}
}
super.processProperties(beanFactory, props);
} catch (Exception e) {
throw new BeanInitializationException(e.getMessage());
}
}

}

 通过自定义DecryptPropertyPlaceholderConfigu 继承 PropertyPlaceholderConfigurer，默认的spring框架会自动加载PropertyPlaceholderConfigurer，通过自定义继承，然后再把所有DES中的配置文件进行解密后还原原有信息。