internal static byte[] update(byte[] key, byte[] update_key)
{
byte[] buffer = new byte[20];
byte[] destinationArray = new byte[m_KeyLength];
byte[] sourceArray = new byte[key.Length];
MemoryStream stream = new MemoryStream();
stream.Write(update_key, 0, m_KeyLength);
stream.Write(m_Pad_54, 0, 40);
stream.Write(key, 0, m_KeyLength);
stream.Position = 0L;
buffer = SHA1.ComputeHash(stream);
stream = new MemoryStream();
stream.Write(update_key, 0, m_KeyLength);
stream.Write(m_Pad_92, 0, 0x30);
stream.Write(buffer, 0, 20);
stream.Position = 0L;
sourceArray = global::MD5.ComputeHash(stream);
Array.Copy(sourceArray, 0, destinationArray, 0, m_KeyLength);
RC4 rc = new RC4();
rc.engineInitDecrypt(destinationArray);
sourceArray = rc.crypt(sourceArray, 0, m_KeyLength);
if (m_KeyLength == 8)
{
Sign.make40bit(sourceArray);
}
return(sourceArray);
}
internal static void process_authreq(RdpPacket data)
{
byte[] destinationArray = new byte[10];
byte[] outData = new byte[10];
byte[] buffer3 = new byte[20];
byte[] buffer4 = new byte[30];
byte[] signature = new byte[0x10];
RC4 rc = new RC4();
byte[] buffer6 = null;
if (!parse_authreq(data))
{
throw new RDFatalException("Authentication request is incorrect!");
}
Array.Copy(RDPClient.m_In_Token, 0, destinationArray, 0, 10);
buffer6 = new byte[RDPClient.m_LicenceKey.Length];
Array.Copy(RDPClient.m_LicenceKey, 0, buffer6, 0, RDPClient.m_LicenceKey.Length);
rc.engineInitDecrypt(buffer6);
rc.crypt(RDPClient.m_In_Token, 0, 10, outData, 0);
byte[] sourceArray = generate_hwid();
Array.Copy(outData, 0, buffer4, 0, 10);
Array.Copy(sourceArray, 0, buffer4, 10, 20);
signature = Secure.sign(RDPClient.m_Licence_Sign_Key, 0x10, 0x10, buffer4, buffer4.Length);
Array.Copy(RDPClient.m_LicenceKey, 0, buffer6, 0, RDPClient.m_LicenceKey.Length);
rc.engineInitEncrypt(buffer6);
rc.crypt(sourceArray, 0, 20, buffer3, 0);
send_authresp(destinationArray, buffer3, signature);
}
internal static void process_issue(RdpPacket data)
{
int count = 0;
RC4 rc = new RC4();
byte[] destinationArray = new byte[RDPClient.m_LicenceKey.Length];
Array.Copy(RDPClient.m_LicenceKey, 0, destinationArray, 0, RDPClient.m_LicenceKey.Length);
data.getLittleEndian16();
count = data.getLittleEndian16();
if ((data.Position + count) <= data.Length)
{
rc.engineInitDecrypt(destinationArray);
byte[] buffer = new byte[count];
data.Read(buffer, 0, count);
rc.crypt(buffer, 0, count, buffer, 0);
}
}