/// <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 Encrypt(string encryptString, string encryptKey, bool compress)
{
try
{
string rnd = encryptKey.Substring(0, 8);
byte[] rgbKey = Encoding.UTF8.GetBytes(rnd);
byte[] rgbIV = Keys;
byte[] inputByteArray = Encoding.UTF8.GetBytes(compress ? Compress.EnCompress(encryptString) : encryptString);
var dCSP = new DESCryptoServiceProvider();
var mStream = new MemoryStream();
var cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
byte[] msbty;
msbty = mStream.ToArray();
var ret = new StringBuilder();
foreach (var b in msbty)
{
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return(rnd + (compress ? "1" : "0") + ret.ToString());
}
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 Decrypt(string decryptString, string decryptKey, bool compress)
{
if (compress)
{
decryptString = Compress.DeCompress(decryptString);
}
var inputByteArray = new byte[decryptString.Length / 2];
for (int x = 0; x < decryptString.Length / 2; x++)
{
int i = (Convert.ToInt32(decryptString.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
var btys = inputByteArray;
var rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
var rgbIV = Keys;
var DCSP = new DESCryptoServiceProvider();
var mStream = new MemoryStream();
var cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(btys, 0, btys.Length);
cStream.FlushFinalBlock();
return(Encoding.UTF8.GetString(mStream.ToArray()));
}
