//Use this as a sample promises method.
function encryptData() {
	var passwd = retrievePasswd();
	if (crypto.subtle) {
		crypto.subtle.digest({ name: "SHA-256" }, passwd).then(
			function (result1) {
				digestHash = result1;

				crypto.subtle.importKey("raw", digestHash, { name: "AES-CBC" }, true, ['encrypt']).then(
					function (result2) {
						digestKey = result2;

						salt = window.crypto.getRandomValues(new Uint8Array(16));
						var aesAlgorithmEncrypt = {
							name: "AES-CBC",
							iv: salt
						};

						crypto.subtle.encrypt(aesAlgorithmEncrypt, digestKey, data).then(
							function (result3) {
								ciphertext = result3;
							}
						);
					}
				);
			},
			function (e2) {
				console.log("Encryption function failed");
			}
		);
	}
}