pin = message->Get("pin").AsString().c_str();
					} else {
						pin = NULL;
					}

					incomingCertificateCACKey.certificate = incomingCertificateContents->Map();					
					incomingCertificateCACKey.certificate_len = incomingCertificateContents->ByteLength();					

					outgoingDataLength = sizeof(buffer);

					signRet = cackey_chrome_signMessage(&incomingCertificateCACKey,
						incomingData->Map(), incomingData->ByteLength(),
						buffer, &outgoingDataLength,
						&pinPrompt, pin
					);