/* Register listeners with Chrome */
	chrome.certificateProvider.onCertificatesRequested.addListener(cackeyListCertificates);
	chrome.certificateProvider.onSignDigestRequested.addListener(cackeySignMessage);
}

function cackeyInit() {
	var elementEmbed;

	/* Verify that we can register callbacks */
	if (!chrome.certificateProvider) {
		console.error("This extension only works on ChromeOS!");

		return;
	}

	if (cackeyHandle != null) {
		return;
	}

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