在python下可以下载pydes 下载地址为
http://pydes.sourceforge.net/在c#下实现des加密较为简单，如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;
namespace des
{
class Program
{
static void Main(string[] args)
{
string ss = EncryptDES("1123", "12345678");
string aa = DecryptDES(ss, "12345678");
}
//默认密钥向量
private static string iv = "1234567812345678";
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="encryptKey">加密密钥,要求为8位</param>
/// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
public static string EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
byte[] rgbIV = Encoding.UTF8.GetBytes(iv);
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
dCSP.Mode = CipherMode.CBC;
dCSP.Padding = PaddingMode.PKCS7;
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <returns>解密成功返回解密后的字符串，失败返源串</returns>
public static string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
byte[] rgbIV = Encoding.UTF8.GetBytes(iv);
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
dCSP.Mode = CipherMode.CBC;
dCSP.Padding = PaddingMode.PKCS7;
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}
}
}
python的实现如下：
#coding:utf-8
import binascii
import base64
import pyDes
class DES:
#IV必须是 8 字节长度的十六进制数
iv = '1234567812345678'
#key加密密钥长度，24字节
key = '12345678'
def __init__(self, iv, key):
self.iv = iv
self.key = key
def encrypt(self, data):
k = pyDes.triple_des(self.key, pyDes.CBC, self.iv, pad=None, padmode=pyDes.PAD_PKCS5)
d = k.encrypt(data)
d = base64.encodestring(d)
return d
def decrypt(self, data):
k = pyDes.triple_des(self.key, pyDes.CBC, self.iv, pad=None, padmode=pyDes.PAD_PKCS5)
data = base64.decodestring(data)
d = k.decrypt(data)
return d
if __name__ == '__main__':
data = "1123"
des = DES('12345678','1234567812345678')
encryptdata = des.encrypt(data.encode('utf-8'))
print encryptdata
decryptdata = des.decrypt(encryptdata)
print decryptdata
posted on 2013-01-06 14:28
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