From: tenderlove@...
Date: 2015-07-26T16:07:12+00:00
Subject: [ruby-core:70126] [Ruby trunk - Bug #10910] NoMethodError when opening SSL connection with OpenSSL::SSL::VERIFY_PEER set and anonymous ciphers allowed

Issue #10910 has been updated by Aaron Patterson.


I see. I'm not sure what I did wrong because it seems to be behaving correctly now.  Maybe I was running an older version of openssl.  Anyway, the patch looks good to me.  I just wish there was an easier way to get a list of the default ciphers other than allocating a new SSLContext object.  I'll poke around and see what I can find, but other than that the patch looks good to me.

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Bug #10910: NoMethodError when opening SSL connection with OpenSSL::SSL::VERIFY_PEER set and anonymous ciphers allowed
https://bugs.ruby-lang.org/issues/10910#change-53558

* Author: Chris Sinjakli
* Status: Feedback
* Priority: Normal
* Assignee: openssl
* ruby -v: ruby 2.3.0dev
* Backport: 2.0.0: REQUIRED, 2.1: REQUIRED, 2.2: REQUIRED
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When establishing an SSL connection with peer verification enabled, if the list of allowed ciphers includes an anonymous cipher, and negotiation with the server results in that cipher being used, a NoMethodError is raised with a stack trace like:

~~~
/Users/sinjo/rubies/2.1.3/lib/ruby/2.1.0/openssl/ssl.rb:99:in `verify_certificate_identity': undefined method `extensions' for nil:NilClass (NoMethodError)
        from /Users/sinjo/rubies/2.1.3/lib/ruby/2.1.0/openssl/ssl.rb:156:in `post_connection_check'
        from /Users/sinjo/rubies/2.1.3/lib/ruby/2.1.0/net/http.rb:922:in `connect'
        from /Users/sinjo/rubies/2.1.3/lib/ruby/2.1.0/net/http.rb:863:in `do_start'
        from /Users/sinjo/rubies/2.1.3/lib/ruby/2.1.0/net/http.rb:852:in `start'
        from ../test_ssl.rb:4:in `<main>'
~~~

This is because no certificate is returned when using an anonymous cipher, while the verification code which runs when OpenSSL::SSL::VERIFY_PEER is set expects one to be present.

I've attached a patch which fixes this. Let me know if there's anything you'd like me to change (happy to refactor, or alter the approach).

This behaviour is present in 2.0, 2.1, and 2.2.

---Files--------------------------------
ssl_verify.patch (2.71 KB)


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