Cookie authentication.

lib/crypto.js

@@ -0,0 +1,31 @@
+import crypto from 'crypto';
+import { v5 as uuid, v4 } from 'uuid';
+import Cryptr from 'cryptr';
+
+const UUID_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-5][0-9a-f]{3}-[089ab][0-9a-f]{3}-[0-9a-f]{12}$/;
+
+const cryptr = new Cryptr(hash(process.env.HASH_SALT, process.env.DATABASE_URL));
+
+export function md5(s) {
+  return crypto.createHash('md5').update(s).digest('hex');
+}
+
+export function hash(...args) {
+  return uuid(args.join(''), md5(process.env.HASH_SALT));
+}
+
+export function validHash(s) {
+  return UUID_REGEX.test(s);
+}
+
+export function encrypt(s) {
+  return cryptr.encrypt(s);
+}
+
+export function decrypt(s) {
+  return cryptr.decrypt(s);
+}
+
+export function random() {
+  return v4();
+}