public static string EncryptStringWith3DES(string data, string key, string iv)
{
UnicodeEncoding unicode = new UnicodeEncoding();
Byte[] Bytes = unicode.GetBytes(data);
MemoryStream mem = new MemoryStream(100);
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
Byte[] KeyBytes = unicode.GetBytes(key);
Byte[] tmpBytes = new Byte[16];
Array.Copy(KeyBytes, tmpBytes, KeyBytes.Length < 16 ? KeyBytes.Length : 16);
KeyBytes = tmpBytes;
if (tdes.ValidKeySize(KeyBytes.Length * 8))
{
System.Diagnostics.Debug.WriteLine("Key size valid");
}
if (TripleDESCryptoServiceProvider.IsWeakKey(KeyBytes))
{
System.Diagnostics.Debug.WriteLine("Key weak");
}
CryptoStream CrStream = new CryptoStream(mem, tdes.CreateEncryptor(KeyBytes, unicode.GetBytes(iv)), CryptoStreamMode.Write);
for (int i = 0; i < Bytes.Length; i++)
{
CrStream.WriteByte(Bytes[i]);
}
CrStream.FlushFinalBlock();
string result = Convert.ToBase64String(mem.GetBuffer(), 0, (int)mem.Length);
CrStream.Dispose();
return(result);
}
