Switch to Signature gem for authentication signature generation.

Rakefile

@@ -14,6 +14,7 @@ begin
     gem.add_dependency "json"
     gem.add_dependency "crack"
     gem.add_dependency "ruby-hmac"
+    gem.add_dependency 'signature'
     gem.add_development_dependency "rspec", ">= 1.2.9"
     gem.add_development_dependency "webmock"
     # gem is a Gem::Specification... see http://www.rubygems.org/read/chapter/20 for additional settings

lib/pusher.rb

@@ -18,7 +18,7 @@ def logger
     end
 
     def authentication_token
-      Authentication::Token.new(@key, @secret)
+      Signature::Token.new(@key, @secret)
     end
   end
 
@@ -36,4 +36,3 @@ def self.[](channel_name)
 end
 
 require 'pusher/channel'
-require 'pusher/authentication'

lib/pusher/channel.rb

@@ -1,4 +1,5 @@
 require 'crack/core_extensions' # Used for Hash#to_params
+require 'signature'
 require 'digest/md5'
 
 require 'json'
@@ -99,7 +100,7 @@ def construct_request(event_name, data, socket_id)
       end
       params[:body_md5] = Digest::MD5.hexdigest(body)
 
-      request = Authentication::Request.new('POST', @uri.path, params)
+      request = Signature::Request.new('POST', @uri.path, params)
       auth_hash = request.sign(Pusher.authentication_token)
 
       query_params = params.merge(auth_hash)