The test case test_error_data utilizes the error message generated by
X509V3_EXT_nconf_nid(). The next commit will use X509V3_EXT_nconf(),
which generates a slightly different error message. Let's adapt the
check to it.
https://github.com/ruby/openssl/commit/9cdfa3a4d1
Error entries in the OpenSSL error queue may contain additional
contextual information associated with the error, which can be helpful
when debugging.
This "additional data" is currently only printed to stderr when
OpenSSL.debug is enabled. Let's include this in the exception messages
raised with ossl_raise(), too.
$ ruby -Ilib -ropenssl -e'OpenSSL.debug=true; OpenSSL::SSL::SSLContext.new.ecdh_curves="P-256:not-a-curve"'
-e:1: warning: error on stack: error:0A080106:SSL routines:gid_cb:passed invalid argument (group 'not-a-curve' cannot be set)
-e:1:in `ecdh_curves=': passed invalid argument (group 'not-a-curve' cannot be set) (OpenSSL::SSL::SSLError)
from -e:1:in `<main>'
https://github.com/ruby/openssl/commit/1c5bbdd68e