public static string Decrypt(string key, string sEncryptedData)
{
string sDecryptedData = string.Empty;
try
{
string s = sEncryptedData.Substring(0, 24);
string input = sEncryptedData.Substring(24, sEncryptedData.Length - 24);
DeriveBytes deriveBytes = new Rfc2898DeriveBytes(key, Encoding.Unicode.GetBytes(s));
SymmetricAlgorithm symmetricAlgorithm = new TripleDESCryptoServiceProvider();
byte[] bytes = deriveBytes.GetBytes(symmetricAlgorithm.KeySize >> 3);
byte[] bytes2 = deriveBytes.GetBytes(symmetricAlgorithm.BlockSize >> 3);
ICryptoTransform transform = symmetricAlgorithm.CreateDecryptor(bytes, bytes2);
using (MemoryStream stream = new MemoryStream(Base64Util.Decode(input)))
{
using (CryptoStream stream2 = new CryptoStream(stream, transform, CryptoStreamMode.Read))
{
using (StreamReader streamReader = new StreamReader(stream2, Encoding.Unicode))
{
sDecryptedData = streamReader.ReadToEnd();
}
}
}
return(sDecryptedData);
}
catch (Exception ex)
{
throw ex;
}
}
public static string Encrypt(string value, string key, string salt)
{
DeriveBytes deriveBytes = new Rfc2898DeriveBytes(key, Encoding.Unicode.GetBytes(salt));
SymmetricAlgorithm symmetricAlgorithm = new TripleDESCryptoServiceProvider();
byte[] rgbKey = deriveBytes.GetBytes(symmetricAlgorithm.KeySize >> 3);
byte[] rgbIv = deriveBytes.GetBytes(symmetricAlgorithm.BlockSize >> 3);
ICryptoTransform transform = symmetricAlgorithm.CreateEncryptor(rgbKey, rgbIv);
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream stream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write))
{
using (StreamWriter streamWriter = new StreamWriter(stream, Encoding.Unicode))
{
streamWriter.Write(value);
}
}
return(salt + Base64Util.Encode(memoryStream.ToArray()));
}
}