https://git.ruby-lang.org/ruby.git/commit/?id=557fa38915

From 557fa389155810f38f111c00a649c313a639dbb5 Mon Sep 17 00:00:00 2001
From: Jean Boussier <jean.boussier@g...>
Date: Mon, 25 Oct 2021 17:02:42 +0200
Subject: [rubygems/rubygems] Fix Bundler::Digest#sha1 on big-endian systems

As noticed by @nobu https://github.com/rubygems/rubygems/pull/4989#discussion_r735674633

From wikipedia: https://en.wikipedia.org/wiki/SHA-1#SHA-1_pseudocode

> append ml, the original message length in bits, as a 64-bit big-endian integer.

`Q` is native endian, so little-endian on most modern hardware.
The original code from RubyDigest reverses the bytes:
https://github.com/Solistra/ruby-digest/blob/d15f906caf09171f897efc74645c9e31373d7fd1/lib/ruby_digest.rb#L521

But that makes the code non-portable, the correct way is to directly ask
for a big-endian representation.

https://github.com/rubygems/rubygems/commit/ba2be01ea4
---
 lib/bundler/digest.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/bundler/digest.rb b/lib/bundler/digest.rb
index d560b82439a..759f6094165 100644
--- a/lib/bundler/digest.rb
+++ b/lib/bundler/digest.rb
@@ -59,7 +59,7 @@ module Bundler https://github.com/ruby/ruby/blob/trunk/lib/bundler/digest.rb#L59
         size   = string.bytesize * 8
         buffer = string.bytes << 128
         buffer << 0 while buffer.size % 64 != 56
-        [size].pack("Q").bytes.reverse_each {|b| buffer << b }
+        buffer.concat([size].pack("Q>").bytes)
         buffer.each_slice(64, &block)
       end
 
-- 
cgit v1.2.1


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