WEBrick with SSL: undefined method `create_extension'


I’m trying to get WEBrick to run a https site but I get the following
error (it seems after keys have been generated for the cert).

[email protected]:/# ruby sslserver.rb [2000-01-06 18:38:03] INFO WEBrick
[2000-01-06 18:38:03] INFO ruby 1.8.5 (2006-08-25) [mips-linux]
/usr/lib/ruby/1.8/webrick/ssl.rb:65:in create_self_signed_cert': undefined methodcreate_extension’ for
#OpenSSL::X509::ExtensionFactory:0x2ae594b8 (NoMethodError)
from /usr/lib/ruby/1.8/webrick/ssl.rb:106:in setup_ssl_context' from /usr/lib/ruby/1.8/webrick/ssl.rb:90:inlisten’
from /usr/lib/ruby/1.8/webrick/server.rb:63:in initialize' from /usr/lib/ruby/1.8/webrick/httpserver.rb:24:ininitialize’
from sslserver.rb:5:in `new’
from sslserver.rb:5

The script is the HTTPS Server example from http://www.webrick.org/ with
modified DocumentRoot:

[email protected]:/# cat sslserver.rb
require ‘webrick’
require ‘webrick/https’

s = WEBrick::HTTPServer.new(
:Port => 2000,
:DocumentRoot => “/”,
:SSLEnable => true,
:SSLVerifyClient => ::OpenSSL::SSL::VERIFY_NONE,
:SSLCertName => [ [“C”,“JP”], [“O”,“WEBrick.Org”], [“CN”, “WWW”] ]
trap(“INT”){ s.shutdown }

Thank you for any help!

Best, Bjorn