Add crypto.js for all things crypto.

lib/make/crypto.js

@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+make.crypto = {
+  keygenAlgorithm: () => {
+    const keygenAlgorithms = [
+      {
+        name: 'ECDSA',
+        namedCurve: 'P-256'
+      },
+      {
+        name: 'RSASSA-PKCS1-v1_5',
+        hash: 'SHA-256',
+        modulusLength: 2048,
+        publicExponent: new Uint8Array([1, 0, 1])
+      }
+    ]
+    return random.pick(keygenAlgorithms)
+  }
+}