# File lib/openid/association.rb, line 64
    def initialize(handle, secret, issued, lifetime, assoc_type)
      if assoc_type != 'HMAC-SHA1'
        raise ArgumentError, "HMAC-SHA1 is the only supported assoc_type, got #{assoc_type}"
      end
      
      @handle = handle
      @secret = secret
      @issued = issued
      @lifetime = lifetime
      @assoc_type = assoc_type
    end