private static string dESDecrypt(string pToDecrypt)
{
if (Base64Util.IsBase64Formatted(pToDecrypt)) //未加密返回原数值
{
try
{
string Key = "DKMAB5DE";//加密密钥必须为8
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 = ASCIIEncoding.ASCII.GetBytes(Key);
des.IV = ASCIIEncoding.ASCII.GetBytes(Key);
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.ASCII.GetString(ms.ToArray()));
}
catch
{
return(pToDecrypt);
}
}
else
{
return(pToDecrypt);
}
}
private static string getMD5ToBase64(string str)
{
if (!Base64Util.IsBase64Formatted(str))
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] message;
message = Encoding.Default.GetBytes(str);
md5.ComputeHash(message).ToString();
return(Convert.ToBase64String(md5.Hash));
}
else
{
return(str);
}
}
