/// <summary>
/// 解密原函数
/// </summary>
/// <param name="pToDecrypt">加密后的密文</param>
/// <param name="sKey">Key</param>
/// <returns>返回加密前的明文</returns>
public static string Decrypt(string pToDecrypt, string sKey = DefaultKey)
{
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = Encoding.ASCII.GetBytes(MD5Helper.Md5Encryptor16(sKey).Substring(0, 8));
des.IV = Encoding.ASCII.GetBytes(MD5Helper.Md5Encryptor16(sKey).Substring(0, 8));
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
return(System.Text.Encoding.Default.GetString(ms.ToArray()));
}
catch { return(null); }
}
/// <summary>
/// 加密原函数
/// </summary>
/// <param name="pToEncrypt">加密前的明文</param>
/// <param name="sKey">Key</param>
/// <returns>返回加密后的密文</returns>
public static string Encrypt(string pToEncrypt, string sKey = DefaultKey)
{
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
des.Key = Encoding.ASCII.GetBytes(MD5Helper.Md5Encryptor16(sKey).Substring(0, 8));
des.IV = Encoding.ASCII.GetBytes(MD5Helper.Md5Encryptor16(sKey).Substring(0, 8));
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return(ret.ToString());
}
catch { return(null); }
}
