在我们项目中，经常需要写数据库的配置，这其中就包含数据库的 host 和密码等信息，尤其是密码这一块，经常会给我们造成困扰，比如要提交 GitHub 啊、或者跟其他人进行合作开发之类的，就会造成密码泄漏，继而造成不必要的损失。
但是如果我们是使用的 druid 链接池，我们是可以对配置文件里面密码进行加密的，经过加密后，我们就不再需要将明文的密码写在配置文件里面了。
工具
- 本文用到到 jar 版本是 1.0.16
druid-1.0.16.jar
使用方法
- 首先将该 jar 文件 下载到本地，然后执行一下命令
java -cp druid-1.0.16.jar com.alibaba.druid.filter.config.ConfigTools yourpassword
例如我到密码是 root ，那么需要执行到命令是：
java -cp druid-1.0.16.jar com.alibaba.druid.filter.config.ConfigTools root
执行命令后，会生成相应到 key 值：
其中包含三个东西：
privateKey:私密，用来解密用，可以忽略
publickey：公密，用来配置在项目数据源
password：密码，用来配置在数据源处，就是原来明文密码到替代品
- 修改配置文件
接下来就应该修改配置文件，将原来到明文密码改为加密后到密码
配置文件需要两个地方到修改：
password：配置 利用工具生成到密码
connection-properties :配置 publickey ，配置格式：connection-properties: config.decrypt=true;config.decrypt.key= 后面直接跟生成的 publickey
全部的配置文件如下：
server: port: 8088 spring: datasource: driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://100.00.000.00:3306/test # 此处ip 改为你数据库到host username: root password: your password druid: filter.config.enabled: true connection-properties: config.decrypt=true;config.decrypt.key=yourpublickey initial-size: 1 min-idle: 1 max-active: 20 max-wait: 60000 time-between-eviction-runs-millis: 60000 min-evictable-idle-time-millis: 300000 validation-query: select 'x' test-while-idle: true test-on-borrow: false test-on-return: false pool-prepared-statements: false max-open-prepared-statements: 20 # stat-view-servlet: # enabled: true # url-pattern: /druid/* # reset-enable: false # login-username: admin # login-password: 123456 jpa: show-sql: true hibernate: ddl-auto: create thymeleaf: encoding: UTF-8 cache: false
测试
直接启动项目测试即可
----------------------------手动分割线-------------------------------
12 月 23 日更新
昨天忘记说了，可以不用执行那个命令，直接执行源码也是可以的。
源码类路径：
com.alibaba.druid.filter.config.ConfigTools
源码内容如下：在 main 方法里面把 password 改成你自己的就可以了
/*
* Copyright 1999-2017 Alibaba Group Holding Ltd. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.alibaba.druid.filter.config;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.RSAPrivateKeySpec;
import java.security.spec.RSAPublicKeySpec;
import java.security.spec.X509EncodedKeySpec;
import javax.crypto.Cipher;
import com.alibaba.druid.util.Base64;
import com.alibaba.druid.util.JdbcUtils;
public class ConfigTools {
private static final String DEFAULT_PRIVATE_KEY_STRING = "MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAocbCrurZGbC5GArEHKlAfDSZi7gFBnd4yxOt0rwTqKBFzGyhtQLu5PRKjEiOXVa95aeIIBJ6OhC2f8FjqFUpawIDAQABAkAPejKaBYHrwUqUEEOe8lpnB6lBAsQIUFnQI/vXU4MV+MhIzW0BLVZCiarIQqUXeOhThVWXKFt8GxCykrrUsQ6BAiEA4vMVxEHBovz1di3aozzFvSMdsjTcYRRo82hS5Ru2/OECIQC2fAPoXixVTVY7bNMeuxCP4954ZkXp7fEPDINCjcQDywIgcc8XLkkPcs3Jxk7uYofaXaPbg39wuJpEmzPIxi3k0OECIGubmdpOnin3HuCP/bbjbJLNNoUdGiEmFL5hDI4UdwAdAiEAtcAwbm08bKN7pwwvyqaCBC//VnEWaq39DCzxr+Z2EIk=";
public static final String DEFAULT_PUBLIC_KEY_STRING = "MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAKHGwq7q2RmwuRgKxBypQHw0mYu4BQZ3eMsTrdK8E6igRcxsobUC7uT0SoxIjl1WveWniCASejoQtn/BY6hVKWsCAwEAAQ==";
public static void main(String[] args) throws Exception {
String password = args[0];
String[] arr = genKeyPair(512);
System.out.println("privateKey:" + arr[0]);
System.out.println("publicKey:" + arr[1]);
System.out.println("password:" + encrypt(arr[0], password));
}
public static String decrypt(String cipherText) throws Exception {
return decrypt((String) null, cipherText);
}
public static String decrypt(String publicKeyText, String cipherText)
throws Exception {
PublicKey publicKey = getPublicKey(publicKeyText);
return decrypt(publicKey, cipherText);
}
public static PublicKey getPublicKeyByX509(String x509File) {
if (x509File == null || x509File.length() == 0) {
return ConfigTools.getPublicKey(null);
}
FileInputStream in = null;
try {
in = new FileInputStream(x509File);
CertificateFactory factory = CertificateFactory
.getInstance("X.509");
Certificate cer = factory.generateCertificate(in);
return cer.getPublicKey();
} catch (Exception e) {
throw new IllegalArgumentException("Failed to get public key", e);
} finally {
JdbcUtils.close(in);
}
}
public static PublicKey getPublicKey(String publicKeyText) {
if (publicKeyText == null || publicKeyText.length() == 0) {
publicKeyText = ConfigTools.DEFAULT_PUBLIC_KEY_STRING;
}
try {
byte[] publicKeyBytes = Base64.base64ToByteArray(publicKeyText);
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(
publicKeyBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA", "SunRsaSign");
return keyFactory.generatePublic(x509KeySpec);
} catch (Exception e) {
throw new IllegalArgumentException("Failed to get public key", e);
}
}
public static PublicKey getPublicKeyByPublicKeyFile(String publicKeyFile) {
if (publicKeyFile == null || publicKeyFile.length() == 0) {
return ConfigTools.getPublicKey(null);
}
FileInputStream in = null;
try {
in = new FileInputStream(publicKeyFile);
ByteArrayOutputStream out = new ByteArrayOutputStream();
int len = 0;
byte[] b = new byte[512 / 8];
while ((len = in.read(b)) != -1) {
out.write(b, 0, len);
}
byte[] publicKeyBytes = out.toByteArray();
X509EncodedKeySpec spec = new X509EncodedKeySpec(publicKeyBytes);
KeyFactory factory = KeyFactory.getInstance("RSA", "SunRsaSign");
return factory.generatePublic(spec);
} catch (Exception e) {
throw new IllegalArgumentException("Failed to get public key", e);
} finally {
JdbcUtils.close(in);
}
}
public static String decrypt(PublicKey publicKey, String cipherText)
throws Exception {
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
try {
cipher.init(Cipher.DECRYPT_MODE, publicKey);
} catch (InvalidKeyException e) {
// 因为 IBM JDK 不支持私钥加密, 公钥解密, 所以要反转公私钥
// 也就是说对于解密, 可以通过公钥的参数伪造一个私钥对象欺骗 IBM JDK RSAPublicKey rsaPublicKey = (RSAPublicKey) publicKey;
RSAPrivateKeySpec spec = new RSAPrivateKeySpec(rsaPublicKey.getModulus(), rsaPublicKey.getPublicExponent());
Key fakePrivateKey = KeyFactory.getInstance("RSA").generatePrivate(spec);
cipher = Cipher.getInstance("RSA"); //It is a stateful object. so we need to get new one.
cipher.init(Cipher.DECRYPT_MODE, fakePrivateKey);
}
if (cipherText == null || cipherText.length() == 0) {
return cipherText;
}
byte[] cipherBytes = Base64.base64ToByteArray(cipherText);
byte[] plainBytes = cipher.doFinal(cipherBytes);
return new String(plainBytes);
}
public static String encrypt(String plainText) throws Exception {
return encrypt((String) null, plainText);
}
public static String encrypt(String key, String plainText) throws Exception {
if (key == null) {
key = DEFAULT_PRIVATE_KEY_STRING;
}
byte[] keyBytes = Base64.base64ToByteArray(key);
return encrypt(keyBytes, plainText);
}
public static String encrypt(byte[] keyBytes, String plainText)
throws Exception {
PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory factory = KeyFactory.getInstance("RSA", "SunRsaSign");
PrivateKey privateKey = factory.generatePrivate(spec);
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
try {
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
} catch (InvalidKeyException e) {
//For IBM JDK, 原因请看解密方法中的说明
RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) privateKey;
RSAPublicKeySpec publicKeySpec = new RSAPublicKeySpec(rsaPrivateKey.getModulus(), rsaPrivateKey.getPrivateExponent());
Key fakePublicKey = KeyFactory.getInstance("RSA").generatePublic(publicKeySpec);
cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, fakePublicKey);
}
byte[] encryptedBytes = cipher.doFinal(plainText.getBytes("UTF-8"));
String encryptedString = Base64.byteArrayToBase64(encryptedBytes);
return encryptedString;
}
public static byte[][] genKeyPairBytes(int keySize)
throws NoSuchAlgorithmException, NoSuchProviderException {
byte[][] keyPairBytes = new byte[2][];
KeyPairGenerator gen = KeyPairGenerator.getInstance("RSA", "SunRsaSign");
gen.initialize(keySize, new SecureRandom());
KeyPair pair = gen.generateKeyPair();
keyPairBytes[0] = pair.getPrivate().getEncoded();
keyPairBytes[1] = pair.getPublic().getEncoded();
return keyPairBytes;
}
public static String[] genKeyPair(int keySize)
throws NoSuchAlgorithmException, NoSuchProviderException {
byte[][] keyPairBytes = genKeyPairBytes(keySize);
String[] keyPairs = new String[2];
keyPairs[0] = Base64.byteArrayToBase64(keyPairBytes[0]);
keyPairs[1] = Base64.byteArrayToBase64(keyPairBytes[1]);
return keyPairs;
}
}
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