Getting Xero Partner app to work on a Mac (from Xero)

xero-partner-oauth-plain.rb

require 'rubygems'
require 'oauth'
require 'oauth/signature/rsa/sha1'

class SSLConsumer < OAuth::Consumer
    
  def initialize *args
    @ssl = {}
    super
  end

  def ssl
    @ssl
  end

  protected

  def create_http *args
    http = super
    
    http.use_ssl = true
    http.cert = @ssl[:cert] if @ssl[:cert]
    http.key = @ssl[:key] if @ssl[:key]
    http.ca_file = @options[:ca_file]
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
    http.verify_depth = 5
    
    http
  end

end

ctoken = 'consumer-key-goes-here'
csecret = 'consumer-secret-goes-here'

consumer_options = {
        :site               => "",
        :request_token_path => "https://api-partner2.network.xero.com/oauth/RequestToken",
        :access_token_path  => "https://api-partner2.network.xero.com/oauth/AccessToken",
        :authorize_path     => "https://api.xero.com/oauth/Authorize",
	    :signature_method => 'RSA-SHA1',
	    :ca_file => File.expand_path(File.join(File.dirname(__FILE__), 'ca-certificates.crt')),
	    :private_key_file => 'privatekey.pem'
      }

consumer = SSLConsumer.new(ctoken, csecret, consumer_options)

def read_file file
  File.open(file) { |x| return x.read }
  nil
end

consumer.ssl[:cert] = OpenSSL::X509::Certificate.new(read_file('entrust.pem'))
consumer.ssl[:key] = OpenSSL::PKey::RSA.new(read_file('entrust-nopass.pem'))

puts "Getting Request Token..."
request_token = consumer.get_request_token()

puts "Request Token: " + request_token.token.to_s
puts "Request Secret: " + request_token.secret.to_s
puts ""

# This only works on OS X
system("open", request_token.authorize_url)

puts 'Enter the verification code from the API:'

verification_code = (gets.chomp).to_i

puts "Getting Access Token..."
access_token = request_token.get_access_token(:oauth_verifier => verification_code)

puts "Access Token: " + access_token.token.to_s
puts "Access Secret: " + access_token.secret.to_s
puts ""

puts "Calling 'Get Organisation'..."
puts access_token.get('https://api-partner2.network.xero.com/api.xro/2.0/Organisation')

This issue was related to an old OpenSSL library on Mac which was causing problems with our client SSL requirements for api-partner.
Note that latest OS updates and Lion have solved these issues for Mac, so api-partner2.network.xero.com has been taken offline.