Python和Java进行DES加密和解密的实例

import javax.crypto.spec.IvParameterSpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class Main {
 public static void main(String[] args) {
  String content = "zx";
  String key = "20171117";
  System.out.println("加密前：" + content);
  byte[] encrypted = DES_CBC_Encrypt(content.getBytes(), key.getBytes());
  System.out.println("加密后：" + byteToHexString(encrypted));
  byte[] decrypted = DES_CBC_Decrypt(encrypted, key.getBytes());
  System.out.println("解密后：" + new String(decrypted));
 }
 public static byte[] DES_CBC_Encrypt(byte[] content, byte[] keyBytes) {
  try {
   DESKeySpec keySpec = new DESKeySpec(keyBytes);
   SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
   SecretKey key = keyFactory.generateSecret(keySpec);
   Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
   cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(keySpec.getKey()));
   byte[] result = cipher.doFinal(content);
   return result;
  } catch (Exception e) {
   System.out.println("exception:" + e.toString());
  }
  return null;
 }
 private static byte[] DES_CBC_Decrypt(byte[] content, byte[] keyBytes) {
  try {
   DESKeySpec keySpec = new DESKeySpec(keyBytes);
   SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
   SecretKey key = keyFactory.generateSecret(keySpec);
   Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
   cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(keyBytes));
   byte[] result = cipher.doFinal(content);
   return result;
  } catch (Exception e) {
   System.out.println("exception:" + e.toString());
  }
  return null;
 }
 private static String byteToHexString(byte[] bytes) {
  StringBuffer sb = new StringBuffer(bytes.length);
  String sTemp;
  for (int i = 0; i < bytes.length; i++) {
   sTemp = Integer.toHexString(0xFF & bytes[i]);
   if (sTemp.length() < 2)
    sb.append(0);
   sb.append(sTemp.toUpperCase());
  }
  return sb.toString();
 }
}

加密前：zx
加密后：1DBBD4E9246EBFFA
解密后：zx

import binascii
from pyDes import des, CBC, PAD_PKCS5

def des_encrypt(s):
 """
 DES 加密
 :param s: 原始字符串
 :return: 加密后字符串，16进制
 """
 secret_key = '20171117'
 iv = secret_key
 k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
 en = k.encrypt(s, padmode=PAD_PKCS5)
 return binascii.b2a_hex(en)

def des_descrypt(s):
 """
 DES 解密
 :param s: 加密后的字符串，16进制
 :return: 解密后的字符串
 """
 secret_key = '20171117'
 iv = secret_key
 k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
 de = k.decrypt(binascii.a2b_hex(s), padmode=PAD_PKCS5)
 return de

str_en = des_encrypt('zx')
print(str_en)
str_de = des_descrypt(str_en)
print(str_de)

1dbbd4e9246ebffa
zx