Port internal TS code to JS (#6793)

Co-authored-by: Ryan Dahl <ry@tinyclouds.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/cli/js2/11_crypto.js b/cli/js2/11_crypto.js
new file mode 100644
index 000000000..ab4a49200
--- /dev/null
+++ b/cli/js2/11_crypto.js
@@ -0,0 +1,22 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+((window) => {
+  const { sendSync } = window.__bootstrap.dispatchJson;
+  const { assert } = window.__bootstrap.util;
+
+  function getRandomValues(typedArray) {
+    assert(typedArray !== null, "Input must not be null");
+    assert(typedArray.length <= 65536, "Input must not be longer than 65536");
+    const ui8 = new Uint8Array(
+      typedArray.buffer,
+      typedArray.byteOffset,
+      typedArray.byteLength,
+    );
+    sendSync("op_get_random_values", {}, ui8);
+    return typedArray;
+  }
+
+  window.__bootstrap.crypto = {
+    getRandomValues,
+  };
+})(this);