var nextFunction = null;
	var chromeCallback = null;

	if (messageEvent.data.target != "cackey") {
		return;
	}

	if (GoogleSmartCard.IS_DEBUG_BUILD) {
		console.log("START MESSAGE");
		console.log(messageEvent.data);
		console.log("END MESSAGE");
	}

	/*
	 * If we failed for some reason and we have a certificate in the original
	 * request then forget any PIN associated with that certificate
	 */
	if (messageEvent.data.status != "success") {
		if (messageEvent.data.originalrequest) {
			if (messageEvent.data.originalrequest.certificate) {
				delete cackeyCertificateToPINMap[cackeyCertificateToPINID(messageEvent.data.originalrequest.certificate)];
			}
		}
	}

	if (messageEvent.data.command == "init" && messageEvent.data.status == "success") {
		if (GoogleSmartCard.IS_DEBUG_BUILD) {
			console.log("[cackey] Initialization completed, resending any queued messages");
		}

		cackeyInitPCSCCompleted("success");
	}

	if (messageEvent.data.id == null) {

					for (messageIdx = 0; messageIdx < cackeyMessagesToRetry.length; messageIdx++) {
						var tmpMessageEvent;

						tmpMessageEvent = cackeyMessagesToRetry[messageIdx];

						if (pinWindowPINValue == "") {
							if (GoogleSmartCard.IS_DEBUG_BUILD) {
								console.log("[cackey] The PIN dialog was closed without gathering a PIN, treating it as a failure.");
							}

							tmpMessageEvent.data.status = "error";
							tmpMessageEvent.data.error = "PIN window closed without a PIN being provided";

							cackeyMessageIncoming(tmpMessageEvent);

/*
 * Handler for messages from Chrome related to listing certificates
 */
function cackeyListCertificates(chromeCallback) {
	var callbackId;

	if (GoogleSmartCard.IS_DEBUG_BUILD) {
		console.log("[cackey] Asked to provide a list of certificates -- throwing that request over to the NaCl side... ");
	}

	callbackId = ++cackeyOutstandingCallbackCounter;

	cackeyInitPCSC(function() {
		cackeyHandle.postMessage(
			{
				'target': "cackey",
				'command': "listcertificates",
				'id': callbackId
			}
		);

		cackeyOutstandingCallbacks[callbackId] = chromeCallback;

		if (GoogleSmartCard.IS_DEBUG_BUILD) {
			console.log("[cackey] Thrown.");
		}
	}, chromeCallback);

	return;
}

/*
 * Handler for messages from Chrome related to listing readers
 */
function cackeyListReaders(chromeCallback) {
	var callbackId;

	if (GoogleSmartCard.IS_DEBUG_BUILD) {
		console.log("[cackey] Asked to provide a list of readers -- throwing that request over to the NaCl side... ");
	}

	callbackId = ++cackeyOutstandingCallbackCounter;

	cackeyInitPCSC(function() {
		cackeyHandle.postMessage(
			{
				'target': "cackey",
				'command': "listreaders",
				'id': callbackId
			}
		);

		cackeyOutstandingCallbacks[callbackId] = chromeCallback;

		if (GoogleSmartCard.IS_DEBUG_BUILD) {
			console.log("[cackey] Thrown.");
		}
	}, chromeCallback);

	return;
}

	digest = new Uint8Array(digestHeader.length + signRequest.digest.byteLength);
	digest.set(digestHeader, 0);
	digest.set(new Uint8Array(signRequest.digest), digestHeader.length);

	delete digestHeader;

	if (GoogleSmartCard.IS_DEBUG_BUILD) {
		console.log("[cackey] Asked to sign a message -- throwing that request over to the NaCl side... ");
	}

	callbackId = ++cackeyOutstandingCallbackCounter;

	command = {
		'target': "cackey",

	}

	cackeyInitPCSC(function() {
		cackeyHandle.postMessage(command);

		cackeyOutstandingCallbacks[callbackId] = chromeCallback;

		if (GoogleSmartCard.IS_DEBUG_BUILD) {
			console.log("[cackey] Thrown.");
		}
	}, chromeCallback);

	return;
}

		console.log("[cackey] cackeyInit(): Already initialized.  Returning.");

		return;
	}

	/* Verify that we can register callbacks */
	if (!chrome.certificateProvider) {
		if (!GoogleSmartCard.IS_DEBUG_BUILD) {
			console.info("[cackey] This extension's primary functionality only works on ChromeOS!  You won't be able to do much with it.");
		}
	}

	elementEmbed = document.createElement('embed');
	elementEmbed.type = "application/x-pnacl";
	elementEmbed.width = 0;