def self.create_csr(key, cn, dc)

  raise Stdlib::Error.new('No suitable key was provided') if key.nil? or ! key.is_a?(OpenSSL::PKey::RSA)
  raise Stdlib::Error.new('No CN was supplied to the certificate') if cn.nil? or ! cn.is_a?(String)
  raise Stdlib::Error.new('No DC array was supplied to the certificate') if dc.nil? or ! dc.is_a?(String)

  dclist = String.new
  dc.each do |d|
    dclist = dclist + "/DC=#{d}"
  end

  name = OpenSSL::X509::Name.parse "CN=#{cn}#{dclist}"

  csr = OpenSSL::X509::Request.new
  csr.version = 0
  csr.subject = name
  csr.public_key = key.public_key
  csr.sign key, OpenSSL::Digest::SHA1.new
end