public CommandHeader(CommandHeader the_CommandHeader)
{
if((Object) the_CommandHeader == null ) throw new ArgumentException(Globs.GetResourceString("parmError"));
Tag = the_CommandHeader.Tag;
CommandSize = the_CommandHeader.CommandSize;
CommandCode = the_CommandHeader.CommandCode;
}
/// <summary>
/// Opens a properly-formed TPM command stream into its constituent components.
/// Note: commandParams does NOT include handles.
/// </summary>
/// <param name="command"></param>
/// <param name="header"></param>
/// <param name="handles"></param>
/// <param name="sessions"></param>
/// <param name="commandParms"></param>
public static bool CrackCommand(
byte[] command,
out CommandHeader header,
out TpmHandle[] handles,
out SessionIn[] sessions,
out byte[] commandParms)
{
var m = new Marshaller(command);
header = m.Get<CommandHeader>();
CommandInfo commandInfo = Tpm2.CommandInfoFromCommandCode(header.CommandCode);
if (header.Tag == TpmSt.Null)
{
// A diagnostics command. Pass through unmodified
handles = null;
sessions = null;
commandParms = null;
return false;
}
handles = new TpmHandle[commandInfo.HandleCountIn];
for (int j = 0; j < handles.Length; j++)
{
handles[j] = m.Get<TpmHandle>();
}
// Note sessions are only present if the command tag indicates sessions
if (header.Tag == TpmSt.Sessions)
{
var sessionLength = m.Get<uint>();
uint sessionEnd = m.GetGetPos() + sessionLength;
var inSessions = new List<SessionIn>();
while (m.GetGetPos() < sessionEnd)
{
var s = m.Get<SessionIn>();
inSessions.Add(s);
}
sessions = inSessions.ToArray();
}
else
{
sessions = new SessionIn[0];
}
// And finally parameters
commandParms = m.GetArray<byte>((int)(m.GetValidLength() - m.GetGetPos()));
if (m.GetValidLength() != header.CommandSize)
{
throw new Exception("Command length in header does not match input byte-stream");
}
return true;
}
