var certificateId;
	var digest, digestHeader;

	/*
	 * Prefix the digest with the ASN.1 header required of it
	 */
	switch (signRequest.hash) {
		case "SHA-1":
		case "SHA1":
			digestHeader = new Uint8Array([0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05, 0x00, 0x04, 0x14]);
			break;
		case "SHA-256":
		case "SHA256":
			digestHeader = new Uint8Array([0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20]);
			break;
		case "MD5_SHA1":
			digestHeader = new Uint8Array();
			break;
		default:
			console.error("[cackey] Asked to sign a message with a hash we do not support: " + signRequest.hash);