des - Someone who knows php and java comes in and wants to ask a question.
1 Do business with other companies, the other party is java, I am php.
2 Both parties encrypt the data with DES first and then base64 encryption. Transmit
3 The other party sent a java encryption and decryption, I should follow it and make a php one. But I can't understand the java code.
4 I hope God can be busy, thank you very much.
package com.ab.mediation.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
* 对外接口数据加密/解密类
* @author xin
*
*/
public class DesUtil {
private final static String DES = "DES";
public static void main(String[] args) throws Exception {
String tDoc = "";// 请求报文
String encoding = "GBK";
// 将函数参数赋给本地参数
String path = "/Users/jieliu/Code/a.txt";
// String path = "F:\testxml\requestAppPolInp881.xml";
String path1 = path;
// 初始化文件对象f
File f = new File(path1);
// 初始化读数据流对象reader
InputStreamReader reader = new InputStreamReader(new FileInputStream(
path1), encoding);
// 根据f文件长度初始化字符串数据c[]
char c[] = new char[(int) (f.length())];
// 取到字符串长度，并将文件f内容写入数组c
int length = reader.read(c);
// 逐字节将字符串数组c[]，赋给变量tDoc
for (int i = 0; i < length; i++) {
tDoc = tDoc + c[i];
}
String key = "12dc293d43db3b237849";
System.out.println(encrypt(tDoc, key));
System.out.println(decrypt(encrypt(tDoc, key), key));
}
/**
* Description 根据键值进行加密
*
* @param data
* @param key
* 加密键byte数组
* @return
* @throws Exception
*/
public static String encrypt(String data, String key) throws Exception {
byte[] bt = encrypt(data.getBytes(), key.getBytes());
String strs = new BASE64Encoder().encode(bt);
return strs;
}
/**
* 指定字符编码方式并加密
* @param data
* @param key
* @param encoding
* @return
* @throws Exception
*/
public static String encrypt(String data, String key, String encoding) throws Exception {
byte[] bt = encrypt(data.getBytes(encoding), key.getBytes());
String strs = new BASE64Encoder().encode(bt);
return strs;
}
/**
* Description 根据键值进行解密
*
* @param data
* @param key
* 加密键byte数组
* @return
* @throws IOException
* @throws Exception
*/
public static String decrypt(String data, String key) throws IOException,
Exception {
if (data == null)
return null;
BASE64Decoder decoder = new BASE64Decoder();
byte[] buf = decoder.decodeBuffer(data);
byte[] bt = decrypt(buf, key.getBytes());
return new String(bt);
}
/**
* 根据键值解密并返回指定编码方式字符串
* @param data
* @param key
* @param encoding
* @return
* @throws IOException
* @throws Exception
*/
public static String decrypt(String data, String key, String encoding) throws IOException,
Exception {
if (data == null)
return null;
BASE64Decoder decoder = new BASE64Decoder();
byte[] buf = decoder.decodeBuffer(data);
byte[] bt = decrypt(buf, key.getBytes());
return new String(bt, encoding);
}
/**
* Description 根据键值进行加密
*
* @param data
* @param key
* 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
/**
* Description 根据键值进行解密
*
* @param data
* @param key
* 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
}
