From 23da49fba0397a2c8f2701efb22634f0a3f68bd8 Mon Sep 17 00:00:00 2001
From: Kim Alvefur <zash@zash.se>
Date: Sat, 18 May 2019 17:28:21 +0200
Subject: util.random: Handle unlikely read errors from /dev/urandom (see
#1313)
---
util/random.lua | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/util/random.lua b/util/random.lua
index d8a84514..8ae06b49 100644
--- a/util/random.lua
+++ b/util/random.lua
@@ -12,7 +12,11 @@ if ok then return crand; end
local urandom, urandom_err = io.open("/dev/urandom", "r");
local function bytes(n)
- return urandom:read(n);
+ local data, err = urandom:read(n);
+ if not data then
+ error("Unable to retrieve data from secure random number generator (/dev/urandom): "..err);
+ end
+ return data;
end
if not urandom then
--
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