//private DecryptedDaedalusPacket _clearPacket;
//internal DecryptedDaedalusPacket clearPacket { get; set; }
#endregion
#region Constructors
/// <summary>
/// Builds a DaedalusPacket object from an encrypted byte stream.
/// This constructor assumes the buffer passed to it has already been verified using DaedalusPacket.IsValidPacket
/// and starts with STX and ends with EOT, with no extraneous bytes.
/// </summary>
internal EncryptedDaedalusPacket(byte[] inBuffer, int startIndex, int length, out DaedalusTestApp.DaedalusGlobal.ReturnCodes returnCode, string AESkey)
{
// Check for STX and EOT in the right places
if ((inBuffer[startIndex] != GlobalConstants.SOH) || (inBuffer[startIndex + length - 1] != GlobalConstants.EOT))
{
returnCode = DaedalusGlobal.ReturnCodes.InvalidPacketStructure;
return;
}
encryptionKey = AESkey;
// Parse packet elements
encryptedPacketLengthFieldValue = BitConverter.ToUInt16(inBuffer, elementPacketLength.ElementStaticOffset + startIndex);
// Copy encrypted payload to internal object
encryptedPayload = new byte[startIndex + encryptedPacketLengthFieldValue - elementETX.ElementSize];
Array.Copy(inBuffer, startIndex + elementEncryptedPacket.ElementStaticOffset, encryptedPayload, 0, encryptedPacketLengthFieldValue - elementETX.ElementSize);
// Decrypt <encryptedPacket>
//decryptedPayload = Convert.FromBase64String(AesEncryptamajig.Decrypt(Convert.ToBase64String(
// encryptedPayload), AESkey));
// Force accessor to perform decryption operation and sync payloads
byte[] temp = decryptedPayload;
returnCode = DaedalusGlobal.ReturnCodes.Valid;
}
/// <summary>
/// Builds an DaedalusPacket object from a byte stream.
/// This constructor assumes the buffer passed to it has already been verified using DaedalusPacket.IsValidPacket
/// and starts with STX and ends with EOT, with no extraneous bytes.
/// </summary>
internal DecryptedDaedalusPacket(byte[] inBuffer, int startIndex, int length, out DaedalusTestApp.DaedalusGlobal.ReturnCodes returnCode)
{
// Check for STX and EOT in the right places
if ((inBuffer[startIndex] != GlobalConstants.STX) || (inBuffer[startIndex + length - 1] != GlobalConstants.EOT))
{
returnCode = DaedalusGlobal.ReturnCodes.InvalidPacketStructure;
return;
}
// Parse packet elements
packetLength = BitConverter.ToUInt16(inBuffer, startIndex + elementPacketLength.ElementStaticOffset);
packetIndex = BitConverter.ToUInt16(inBuffer, startIndex + elementPacketIndex.ElementStaticOffset);
//hash = new IDHash(inBuffer, startIndex + elementIDHash.ElementOffset);
command = (Commands)inBuffer[startIndex + elementCommand.ElementStaticOffset];
commandVersion = inBuffer[startIndex + elementCommandVersion.ElementStaticOffset];
ushort payloadLength = BitConverter.ToUInt16(inBuffer, startIndex + elementCommandPayloadLength.ElementStaticOffset);
payload = new Dictionary <string, DaedalusGlobal.PayloadElement>();
// Select the first of the packet types (should only be one) that match the type of this command
IEnumerable <IDaedalusCommandType> commandTypeMatches = commandTypes.Where(p => p.getCommand() == command);
// Parse this packet's payload
if (commandTypeMatches.Count() == 0)
{
#if DEBUG
GlobalMethods.TestLog("Packet " + BitConverter.ToString(inBuffer, startIndex, length) + " invokes command that is not implemented.");
#endif
returnCode = DaedalusGlobal.ReturnCodes.CommandNotImplemented;
}
else
{
// Just in case there's more than one type for each command, take the first one
this.commandType = commandTypeMatches.First();
byte[] payloadBuffer = new byte[length];
Array.Copy(inBuffer, startIndex, payloadBuffer, 0, length);
Dictionary <string, DaedalusGlobal.PayloadElement> tryPayload;
// Try to parse the packet's payload
returnCode = commandType.parsePayload(payloadBuffer, elementCommandPayload.ElementStaticOffset, out tryPayload);
this.payload = tryPayload;
#if DEBUG
if (returnCode == DaedalusGlobal.ReturnCodes.Valid)
{
GlobalMethods.TestLog("Packet " + BitConverter.ToString(inBuffer, startIndex, length) + " constructed.");
}
else
{
GlobalMethods.TestLog("Packet " + BitConverter.ToString(inBuffer, startIndex, length) + " construction failed, code: " + Enum.GetName(typeof(DaedalusGlobal.ReturnCodes), returnCode) + ".");
}
#endif
}
}
