[ruby-core:46908] [ruby-trunk - Feature #6819][Open] OpenSSL::Digest.new should return an instance of the chosen subclass

Issue #6819 has been reported by drbrain (Eric Hodel).

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Feature #6819: OpenSSL::Digest.new should return an instance of the chosen subclass
https://bugs.ruby-lang.org/issues/6819

Author: drbrain (Eric Hodel)
Status: Open
Priority: Normal
Assignee: MartinBosslet (Martin Bosslet)
Category: ext
Target version: 2.0.0


=begin
OpenSSL::Digest.new allows you to create a digest given the digest name:

  digester = OpenSSL::Digest.new "SHA1"
  digester.update "hello"
  # …

The digester returned is of class OpenSSL::Digest regardless of the input type.

I would like this changed so that it returns the specific subclass of OpenSSL::Digest:

  digester = OpenSSL::Digest.new "SHA1"
  digester.class #=> OpenSSL::Digest::SHA1

When multiple digests are created this makes it easier to distinguish the type of digest you are working with.

This will also make OpenSSL::Digest.new behave similarly to Digest:

  digester = Digest("SHA1").new
  digester.class #=> Digest::SHA1

=end


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