/// <summary>
/// 获得初始向量IV
/// </summary>
/// <returns> 初试向量IV </returns>
private byte[] GetLegalIV()
{
string sTemp = IV;
rc.GenerateIV();
byte[] bytTemp = rc.IV;
int IVLength = bytTemp.Length;
if (sTemp.Length > IVLength)
{
sTemp = sTemp.Substring(0, IVLength);
}
else if (sTemp.Length < IVLength)
{
sTemp = sTemp.PadRight(IVLength, ' ');
}
return(ASCIIEncoding.ASCII.GetBytes(sTemp));
}
private void encode_RC2_CBF_Click(object sender, EventArgs e)
{
DateTime then = DateTime.Now;
String Data = input7.Text;
try
{
MemoryStream mStream = new MemoryStream();
RC2 alg = RC2.Create();
alg.GenerateKey();
Key = alg.Key;
alg.GenerateIV();
IV = alg.IV;
CryptoStream cStream = new CryptoStream(mStream,
alg.CreateEncryptor(Key, IV),
CryptoStreamMode.Write);
byte[] toEncrypt = new ASCIIEncoding().GetBytes(Data);
cStream.Write(toEncrypt, 0, toEncrypt.Length);
cStream.FlushFinalBlock();
byte[] ret = mStream.ToArray();
cStream.Close();
mStream.Close();
cipherbytes = ret;
input8.Text = Encoding.UTF8.GetString(cipherbytes);
delta4.Text = (DateTime.Now - then).TotalSeconds.ToString() + " сек";
}
catch (CryptographicException ex)
{
Console.WriteLine("A Cryptographic error occurred: {0}", ex.Message);
return;
}
}
public string CreateRC2IV()
{
rc2.GenerateIV();
return(ByteToString(rc2.IV));
}