/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="Key">密鑰</param>
/// <returns>加密成功返回加密后的字符串，失敗返回源串</returns>
public static string EncryptDES(string encryptString, byte[] Key)
{
try
{
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Key = Key;
des.Mode = CipherMode.ECB;
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, des.CreateEncryptor(), 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>
/// <returns>解密成功返回解密后的字符串，失敗返源串</returns>
public static string DecryptDES(string decryptString, byte[] Key)
{
try
{
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Key = Key;
des.Mode = CipherMode.ECB;
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, des.CreateDecryptor(), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}

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