Issue #13170 has been updated by Ethan Brown.

Description updated

----------------------------------------
Bug #13170: OpenSSL::X509::Name#eql? broken in Ruby 2.4.0
https://bugs.ruby-lang.org/issues/13170#change-62722

* Author: Ethan Brown
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin15]
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
Previously the behavior in Ruby `2.3.1` and earlier was:

```
[1] pry(main)> OpenSSL::X509::Name.new([['CN', 'foo']]).eql?(OpenSSL::X509::Name.new([['CN', 'bar']]))
=> false
[2] pry(main)> OpenSSL::X509::Name.new([['CN', 'foo']]).eql?(OpenSSL::X509::Name.new([['CN', 'foo']]))
=> true
[3] pry(main)> RUBY_VERSION
=> "2.3.1"
```

In Ruby 2.4.0, the evaluation is backwards:

```
[1] pry(main)> OpenSSL::X509::Name.new([['CN', 'foo']]).eql?(OpenSSL::X509::Name.new([['CN', 'bar']]))
=> true
[2] pry(main)> OpenSSL::X509::Name.new([['CN', 'foo']]).eql?(OpenSSL::X509::Name.new([['CN', 'foo']]))
=> false
[3] pry(main)> RUBY_VERSION
=> "2.4.0"
```

This is due to the implementation of  the function at https://github.com/ruby/ruby/blob/aab0d67a1ff5190ff7a951e40cee742210302aed/ext/openssl/ossl_x509name.c#L366-L379

```
static VALUE ossl_x509name_eql(VALUE self, VALUE other)
```

Previously in `2.3.1` code returned (based on `result = ossl_x509name_cmp0(self, other);`):

```
return (result == 0) ? Qtrue : Qfalse;
```

Now the code has introduced a logic bug in 2.4.0 as of commit https://github.com/ruby/ruby/commit/aab0d67a1ff5190ff7a951e40cee742210302aed:

```
return ossl_x509name_cmp0(self, other) ? Qtrue : Qfalse;
```

The code should be:

```
return (ossl_x509name_cmp0(self, other) == 0) ? Qtrue : Qfalse;
```



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