explicit CACKeyInstance(PP_Instance instance, pp::Core *core) : pp::Instance(instance) {
			std::thread(&CACKeyInstance::pcscNaClInitWrapper, this, core).detach();
		}

		virtual ~CACKeyInstance() {}

		virtual void HandleMessageThread(pp::VarDictionary *message) {
			cackey_chrome_returnType signRet;
			char *pinPrompt;
			const char *pin;
			unsigned char buffer[8192];
			struct cackey_certificate *certificates, incomingCertificateCACKey;
			pp::VarDictionary *reply;
			pp::VarArray certificatesPPArray;
			pp::VarArrayBuffer *certificateContents, *incomingCertificateContents, *incomingData, *outgoingData;
			pp::Var command;
			const pp::Var *messageAsVar = NULL, *outgoingDataAsVar = NULL;
			int numCertificates, i;
			unsigned long outgoingDataLength;

			/*
			 * Extract the command
			 */
			command = message->Get("command");

			/*

				reply->Set("status", "success");
				reply->Set("certificates", certificatesPPArray);
			} else if (command.AsString() == "sign") {
				if (!message->HasKey("certificate")) {
					reply->Set("status", "error");
					reply->Set("error", "Certificate not supplied");
				} else if (!message->HasKey("data")) {
					reply->Set("status", "error");
					reply->Set("error", "Data not supplied");
				} else {
					incomingCertificateContents = new pp::VarArrayBuffer(message->Get("certificate"));
					incomingData = new pp::VarArrayBuffer(message->Get("data"));

					if (message->HasKey("pin")) {
						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
					);

					incomingCertificateContents->Unmap();
					incomingData->Unmap();

					delete incomingCertificateContents;
					delete incomingData;

					switch (signRet) {
						case CACKEY_CHROME_OK:
							outgoingData = new pp::VarArrayBuffer(outgoingDataLength);

							memcpy(outgoingData->Map(), buffer, outgoingDataLength);

							outgoingData->Unmap();

							outgoingDataAsVar = new pp::Var(outgoingData->pp_var());

							delete outgoingData;

							reply->Set("status", "success");
							reply->Set("signedData", outgoingDataAsVar);

							delete outgoingDataAsVar;

							break;
						case CACKEY_CHROME_ERROR:
							reply->Set("status", "error");
							reply->Set("error", "Unable to sign data");
							break;
						case CACKEY_CHROME_NEEDLOGIN:
						case CACKEY_CHROME_NEEDPROTECTEDLOGIN:
							messageAsVar = new pp::Var(message->pp_var());

							reply->Set("status", "retry");
							reply->Set("originalrequest", messageAsVar);

							delete messageAsVar;

							break;
					}
				}
			} else {
				reply->Set("status", "error");
				reply->Set("error", "Invalid command");
			}

			/*

	}

	free(certificates);

	return;
}

cackey_chrome_returnType cackey_chrome_signMessage(struct cackey_certificate *certificate, void *data, unsigned long dataLength, void *destination, unsigned long *destinationLength, char **pinPrompt, const char *pin) {
	CK_RV chk_rv;
	CK_ULONG numSlots, currSlot;
	CK_SLOT_ID_PTR slots;
	CK_SLOT_INFO slotInfo;
	CK_SESSION_HANDLE hSession;
	CK_OBJECT_HANDLE hObject, hKey;
	CK_ULONG ulObjectCount;

#ifndef CACKEY_CHROME_CACKEY_H
#define CACKEY_CHROME_CACKEY_H 1

#  ifdef __cplusplus
extern "C" {
#  endif

#include <stddef.h>

struct cackey_certificate {
	size_t certificate_len;
	void *certificate;
};

typedef enum {
	CACKEY_CHROME_OK,
	CACKEY_CHROME_ERROR,
	CACKEY_CHROME_NEEDLOGIN,
	CACKEY_CHROME_NEEDPROTECTEDLOGIN
} cackey_chrome_returnType;

int cackey_chrome_listCertificates(struct cackey_certificate **certificates);
void cackey_chrome_freeCertificates(struct cackey_certificate *certificates, int certificatesCount);

cackey_chrome_returnType cackey_chrome_signMessage(struct cackey_certificate *certificate, void *data, unsigned long dataLength, void *destination, unsigned long *destinationLength, char **pinPrompt, const char *pin);

void cackey_chrome_terminate(void);

#  ifdef __cplusplus
}
#  endif

/*
 * Communication with the PIN entry window
 */
var pinWindowPINValue = "";
var pinWindowPreviousHandle = null;

/*
 * Messages that may need to be retried after getting a PIN
 */
var cackeyMessagesToRetry = [];

/*
 * Handle a response from the NaCl side regarding certificates available
 */
function cackeyMessageIncomingListCertificates(message, chromeCallback) {
	var idx;
	var certificates = [];

		case "error":
			console.error("[cackey] Failed to execute command '" + messageEvent.data.command + "': " + messageEvent.data.error);

			chromeCallback();

			break;
		case "retry":

			/*
			 * Add the new request to the queue of events to process when the PIN
			 * prompt is terminated.
			 */
			cackeyMessagesToRetry.push(messageEvent);

			if (pinWindowPreviousHandle) {
				/*
				 * An existing PIN entry is in progress
				 * Just add the request to the queue (above) and wait
				 */


				return;
			}

			/*
			 * Set the handle to an invalid (but non-null) value until the window
			 * is created in case we are invoked again soon.
			 */
			pinWindowPreviousHandle = "invalid";

			chrome.app.window.create("pin.html", {
				"id": "cackeyPINEntry",
				"resizable": false,
				"alwaysOnTop": true,
				"focused": true,
				"visibleOnAllWorkspaces": true,
				"innerBounds": {
					"width": 350,
					"minWidth": 350,
					"height": 135,
					"minHeight": 135
				}
			}, function(pinWindow) {
				/*
				 * Set the PIN value to blank
				 */
				pinWindowPINValue = "";

				if (!pinWindow) {
					console.log("[cackey] No window was provided for PIN entry, this will not go well.");

					return;
				}

				pinWindowPreviousHandle = pinWindow;

				pinWindow.drawAttention();
				pinWindow.focus();

				/*
				 * Register a handler to handle the window being closed without
				 * having sent anything
				 */
				pinWindow.onClosed.addListener(function() {
					var messageIdx;

					pinWindowPreviousHandle = null;

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

						tmpMessageEvent = cackeyMessagesToRetry[messageIdx];

						if (pinWindowPINValue == "") {
							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);
						} else {
							cackeyHandle.postMessage(tmpMessageEvent.data.originalrequest);
						}

						delete cackeyMessagesToRetry[messageIdx];
					}

					return;
				})

				/*
				 * Pass this message off to the other window so that it may resubmit the request.