From 6cf00e15f87236d79eff6092b91bb71a77f2c590 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 31 Dec 2014 08:50:10 +0000
Subject: * lib/resolv.rb (Resolv::DNS::Label::Str#initialize): Set encoding  
 ASCII-8BIT before downcase.  case insensivity of DNS labels doesn't   apply
 non-ASCII characters.  [RFC 4343]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49083 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/resolv.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'lib/resolv.rb')

diff --git a/lib/resolv.rb b/lib/resolv.rb
index 3f3ed41a47..08bfde583b 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -1170,7 +1170,9 @@ class Resolv
       class Str # :nodoc:
         def initialize(string)
           @string = string
-          @downcase = string.downcase
+          # case insensivity of DNS labels doesn't apply non-ASCII characters. [RFC 4343]
+          # This assumes @string is given in ASCII compatible encoding.
+          @downcase = string.dup.force_encoding('ASCII-8BIT').downcase
         end
         attr_reader :string, :downcase
 
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