/// <summary>
/// Encrypts message
/// </summary>
public byte[] EncryptMessage(SecurityContext context, byte[] message)
{
// parameters validation
if (context == null)
{
throw new ArgumentNullException("context");
}
if (message == null)
{
throw new ArgumentNullException("message");
}
// prepare buffers
SecurityBuffers inputBuffers = new SecurityBuffers(2);
inputBuffers.SetBuffer(0, (int)SSPINative.SECBUFFER_DATA, message);
inputBuffers.SetBuffer(1, (int)SSPINative.SECBUFFER_TOKEN, context.SecurityTrailer);
// encrypt message
Int64 contextHandle = context.Handle;
int error = SSPINative.EncryptMessage(
ref contextHandle,
0,
inputBuffers,
0);
if (error < 0)
{
throw new SSPIException(error, "Could not encrypt message");
}
// get encrypted data and trailer
byte[] encrypted = inputBuffers.GetBuffer(0);
byte[] trailer = inputBuffers.GetBuffer(1);
inputBuffers.Dispose();
// create encrypted buffer
return(CreateEncryptedBuffer(encrypted, trailer));
}