callback.rb in phaxio-2.1.0

- old
+ new
@@ -1,64 +1,18 @@
 module Phaxio
   module Resources
-    # Provides utilities for working with callbacks.
-    # @see https://www.phaxio.com/docs/api/v2/faxes/send_callback
-    # @see https://www.phaxio.com/docs/api/v2/faxes/receive_callback
+    # This class is provided for the sake of backwards compatibility; use the Webhook resource instead.
+    # @see Phaxio::Resources::Webhook
     class Callback
-      DIGEST = OpenSSL::Digest.new('sha1')
-      private_constant :DIGEST
-
       class << self
-        # Determines whether or not the passed signature is valid for the given
-        # url, params, and files.
-        # @param signature [String]
-        #   The signature received from Phaxio.
-        # @param url [String]
-        #   The callback URL used in this request.
-        # @param params [Hash]
-        #   The parameters received with the callback, excluding files.
-        # @param files [Array<File>]
-        #   The files received with the callback, if any.
-        # @return [true, false]
-        # @raise [Phaxio::Error::PhaxioError]
-        # @see https://www.phaxio.com/docs/security/callbacks
-        def valid_signature? signature, url, params, files = []
-          check_signature = generate_check_signature url, params, files
-          check_signature == signature
-        end
-
-        private
-
-        def generate_check_signature url, params, files = []
-          params_string = generate_params_string(params)
-          files_string = generate_files_string(files)
-          callback_data = "#{url}#{params_string}#{files_string}"
-          OpenSSL::HMAC.hexdigest(DIGEST, callback_token, callback_data)
-        end
-
-        def callback_token
-          Phaxio.callback_token or raise(Error::PhaxioError, 'No callback token has been set')
-        end
-
-        def generate_params_string(params)
-          sorted_params = params.sort_by { |key, _value| key }
-          params_strings = sorted_params.map { |key, value| "#{key}#{value}" }
-          params_strings.join
-        end
-
-        def generate_files_string(files)
-          files_array = files_to_array(files).reject(&:nil?)
-          sorted_files = files_array.sort_by { |file| file[:name] }
-          files_strings = sorted_files.map { |file| generate_file_string(file) }
-          files_strings.join
-        end
-
-        def files_to_array(files)
-          files.is_a?(Array) ? files : [files]
-        end
-
-        def generate_file_string(file)
-          file[:name] + DIGEST.hexdigest(file[:tempfile].read)
+        def valid_signature? *args
+          Phaxio::Resources::Webhook.valid_signature? *args
+        rescue Error::PhaxioError => error
+          if error.message == 'No webhook token has been set'
+            raise Error::PhaxioError, 'No callback token has been set'
+          else
+            raise error
+          end
         end
       end
     end
   end
 end