From 17b91b9368d682b8650a5c53ddfb8bc54fb1f71e Mon Sep 17 00:00:00 2001
From: Andrey Antukh <niwi@niwi.nz>
Date: Thu, 12 Dec 2019 01:01:12 +0100
Subject: [PATCH] :tada: Add fill method to rng-impl ns.

---
 frontend/src/uxbox/util/rng_impl.js | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/frontend/src/uxbox/util/rng_impl.js b/frontend/src/uxbox/util/rng_impl.js
index d124b728d..371cc21eb 100644
--- a/frontend/src/uxbox/util/rng_impl.js
+++ b/frontend/src/uxbox/util/rng_impl.js
@@ -19,6 +19,11 @@ goog.scope(function() {
   if (cljs.core._STAR_target_STAR_ === "nodejs") {
     const crypto = require("crypto");
 
+    self.fill = function(buf) {
+      crypto.randomFillSync(buf);
+      return buf;
+    };
+
     self.getBytes = function(n) {
       return crypto.randomBytes(n);
     };
@@ -27,6 +32,12 @@ goog.scope(function() {
   // Check if whatwg rng is available (high quality);
   else if (global.crypto !== undefined &&
            global.crypto.getRandomValues !== undefined) {
+
+    self.fill = function(buf) {
+      global.crypto.getRandomValues(buf);
+      return buf;
+    };
+
     self.getBytes = function(n) {
       const buf = new Uint8Array(16);
       global.crypto.getRandomValues(buf);
@@ -37,6 +48,16 @@ goog.scope(function() {
   // Switch Back to the Math.random (low quality);
   else {
     console.warn("No high quality RNG available, switching back to Math.random.");
+
+    self.fill = function(buf) {
+      for (let i = 0, r; i < buf.length; i++) {
+        if ((i & 0x03) === 0) { r = Math.random() * 0x100000000; }
+        buf[i] = r >>> ((i & 0x03) << 3) & 0xff;
+      }
+
+      return buf;
+    };
+
     self.getBytes = function(n) {
       const buf = new Array(n);
       for (let i = 0, r; i < n; i++) {