Add the GkdiFfcDhParameters class

Author: zeroSteiner

lib/ruby_smb/dcerpc/gkdi.rb

@@ -13,6 +13,7 @@ module Gkdi
       require 'ruby_smb/dcerpc/gkdi/gkdi_get_key_request'
       require 'ruby_smb/dcerpc/gkdi/gkdi_get_key_response'
       require 'ruby_smb/dcerpc/gkdi/gkdi_ffc_dh_key'
+      require 'ruby_smb/dcerpc/gkdi/gkdi_ffc_dh_parameters'
       require 'ruby_smb/dcerpc/gkdi/gkdi_group_key_envelope'
 
       def gkdi_get_key(target_sd, root_key_id, l0_key_id, l1_key_id, l2_key_id)

lib/ruby_smb/dcerpc/gkdi/gkdi_ffc_dh_parameters.rb

@@ -0,0 +1,17 @@
+module RubySMB
+  module Dcerpc
+    module Gkdi
+
+      # [2.2.2 FFC DH Parameters](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-gkdi/e15ae269-ee21-446a-a480-de3ea243db5f)
+      class GkdiFfcDhParameters < BinData::Record
+        endian :little
+
+        uint32      :parameters_length, initial_value: -> { (key_length * 2) + offset_of(generator) }
+        uint8_array :magic, initial_length: 4, initial_value: [ 0x44, 0x48, 0x50, 0x4d ]
+        uint32      :key_length
+        uint8_array :field_order, initial_length: :key_length
+        uint8_array :generator, initial_length: :key_length
+      end
+    end
+  end
+end