From f766db7e9e711c5f56fddcd16069e1133773fada Mon Sep 17 00:00:00 2001
From: Didactic Drunk <1479616+didactic-drunk@users.noreply.github.com>
Date: Sat, 28 Sep 2019 08:58:25 -0700
Subject: [PATCH] Sodium::SecureBuffer Fix copying noaccess SecureBuffer's.

---
 src/sodium/secure_buffer.cr | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/sodium/secure_buffer.cr b/src/sodium/secure_buffer.cr
index 05713a3..a7d4248 100644
--- a/src/sodium/secure_buffer.cr
+++ b/src/sodium/secure_buffer.cr
@@ -49,7 +49,10 @@ module Sodium
     # For .dup
     def initialize(sbuf : self)
       initialize sbuf.bytesize
-      sbuf.to_slice.copy_to self.to_slice
+      # Maybe not thread safe
+      sbuf.readonly do
+        sbuf.to_slice.copy_to self.to_slice
+      end
       readonly
     end