Add the ability to query group memberships

lib/ruby_smb/dcerpc/request.rb

@@ -70,6 +70,8 @@ class Request < BinData::Record
           samr_close_handle_request                    Samr::SAMR_CLOSE_HANDLE
           samr_get_alias_membership_request            Samr::SAMR_GET_ALIAS_MEMBERSHIP
           samr_open_user_request                       Samr::SAMR_OPEN_USER
+          samr_open_group_request                      Samr::SAMR_OPEN_GROUP
+          samr_get_members_in_group_request            Samr::SAMR_GET_MEMBERS_IN_GROUP
           samr_get_groups_for_user_request             Samr::SAMR_GET_GROUPS_FOR_USER
           samr_enumerate_domains_in_sam_server_request Samr::SAMR_ENUMERATE_DOMAINS_IN_SAM_SERVER
           samr_lookup_names_in_domain_request          Samr::SAMR_LOOKUP_NAMES_IN_DOMAIN

lib/ruby_smb/dcerpc/samr.rb

@@ -20,6 +20,8 @@ module Samr
       SAMR_ENUMERATE_USERS_IN_DOMAIN       = 0x000D
       SAMR_GET_ALIAS_MEMBERSHIP            = 0x0010
       SAMR_LOOKUP_NAMES_IN_DOMAIN          = 0x0011
+      SAMR_OPEN_GROUP                      = 0x0013
+      SAMR_GET_MEMBERS_IN_GROUP            = 0x0019
       SAMR_OPEN_USER                       = 0x0022
       SAMR_DELETE_USER                     = 0x0023
       SAMR_GET_GROUPS_FOR_USER             = 0x0027
@@ -509,8 +511,12 @@ def get_key_values
       require 'ruby_smb/dcerpc/samr/samr_rid_to_sid_response'
       require 'ruby_smb/dcerpc/samr/samr_close_handle_request'
       require 'ruby_smb/dcerpc/samr/samr_close_handle_response'
+      require 'ruby_smb/dcerpc/samr/samr_get_members_in_group_request'
+      require 'ruby_smb/dcerpc/samr/samr_get_members_in_group_response'
       require 'ruby_smb/dcerpc/samr/samr_get_alias_membership_request'
       require 'ruby_smb/dcerpc/samr/samr_get_alias_membership_response'
+      require 'ruby_smb/dcerpc/samr/samr_open_group_request'
+      require 'ruby_smb/dcerpc/samr/samr_open_group_response'
       require 'ruby_smb/dcerpc/samr/samr_open_user_request'
       require 'ruby_smb/dcerpc/samr/samr_open_user_response'
       require 'ruby_smb/dcerpc/samr/samr_get_groups_for_user_request'
@@ -935,6 +941,40 @@ def samr_get_alias_membership(domain_handle:, sids:)
         samr_get_alias_membership_reponse.membership.elements.to_ary
       end
 
+      # Returns a handle to a group, given a RID
+      #
+      # @param domain_handle [RubySMB::Dcerpc::Samr::SamprHandle] An RPC context
+      #   representing a domain object
+      # @param access [Integer] An access control that indicates the requested
+      #   access for the returned handle. It is a bitwise OR of common
+      #   ACCESS_MASK and user ACCESS_MASK values (see
+      #   lib/ruby_smb/dcerpc/samr.rb)
+      # @param group_id [Integer] RID of a group
+      # @return [RubySMB::Dcerpc::Samr::SamprHandle] The group handle
+      # @raise [RubySMB::Dcerpc::Error::InvalidPacket] if the response is not a
+      #   SamrOpenGroup packet
+      # @raise [RubySMB::Dcerpc::Error::SamrError] if the response error status
+      #   is not STATUS_SUCCESS
+      def samr_open_group(domain_handle:, access: MAXIMUM_ALLOWED, group_id:)
+        samr_open_group_request = SamrOpenGroupRequest.new(
+          domain_handle: domain_handle,
+          desired_access: access,
+          group_id: group_id
+        )
+        response = dcerpc_request(samr_open_group_request)
+        begin
+          samr_open_group_response = SamrOpenGroupResponse.read(response)
+        rescue IOError
+          raise RubySMB::Dcerpc::Error::InvalidPacket, 'Error reading SamrOpenGroupResponse'
+        end
+        unless samr_open_group_response.error_status == WindowsError::NTStatus::STATUS_SUCCESS
+          raise RubySMB::Dcerpc::Error::SamrError,
+            "Error returned when getting a handle to group #{group_id}: "\
+            "#{WindowsError::NTStatus.find_by_retval(samr_open_grou_response.error_status.value).join(',')}"
+        end
+        samr_open_group_response.group_handle
+      end
+
       # Returns a handle to a user, given a RID
       #
       # @param domain_handle [RubySMB::Dcerpc::Samr::SamprHandle] An RPC context
@@ -969,6 +1009,36 @@ def samr_open_user(domain_handle:, access: MAXIMUM_ALLOWED, user_id:)
         samr_open_user_response.user_handle
       end
 
+      # Returns a listing of members of the given group
+      #
+      # @param group_handle [RubySMB::Dcerpc::Samr::SamprHandle] An RPC context
+      #   representing a group object.
+      # @return [Array<Array<String,String>>] Array of RID and Attributes
+      # @raise [RubySMB::Dcerpc::Error::InvalidPacket] if the response is not a
+      #   SamrGetMembersInGroup packet
+      # @raise [RubySMB::Dcerpc::Error::SamrError] if the response error status
+      #   is not STATUS_SUCCESS
+      def samr_get_members_in_group(group_handle:)
+        samr_get_members_in_group_request = SamrGetMembersInGroupRequest.new(
+          group_handle: group_handle
+        )
+        response = dcerpc_request(samr_get_members_in_group_request)
+        begin
+          samr_get_members_in_group_response = SamrGetMembersInGroupResponse.read(response)
+        rescue IOError
+          raise RubySMB::Dcerpc::Error::InvalidPacket, 'Error reading SamrGetMembersInGroupResponse'
+        end
+        unless samr_get_members_in_group_response.error_status == WindowsError::NTStatus::STATUS_SUCCESS
+          raise RubySMB::Dcerpc::Error::SamrError,
+            "Error returned while getting group membership: "\
+            "#{WindowsError::NTStatus.find_by_retval(samr_get_members_in_group_response.error_status.value).join(',')}"
+        end
+        members = samr_get_members_in_group_response.members.members.to_ary
+        attributes = samr_get_members_in_group_response.members.attributes.to_ary
+
+        members.zip(attributes)
+      end
+
       # Returns a listing of groups that a user is a member of
       #
       # @param user_handle [RubySMB::Dcerpc::Samr::SamprHandle] An RPC context

lib/ruby_smb/dcerpc/samr/samr_get_members_in_group_request.rb

@@ -0,0 +1,23 @@
+module RubySMB
+  module Dcerpc
+    module Samr
+
+      # [3.1.5.8.3 SamrGetMembersInGroup (Opnum 25)](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-samr/3ed5030d-88a3-42ca-a6e0-8c12aa2fdfbd)
+      class SamrGetMembersInGroupRequest < BinData::Record
+        attr_reader :opnum
+
+        endian :little
+
+        sampr_handle :group_handle
+
+        def initialize_instance
+          super
+          @opnum = SAMR_GET_MEMBERS_IN_GROUP
+        end
+      end
+
+    end
+  end
+end
+
+

lib/ruby_smb/dcerpc/samr/samr_get_members_in_group_response.rb

@@ -0,0 +1,34 @@
+module RubySMB
+  module Dcerpc
+    module Samr
+      # [2.2.7.14 SAMPR_GET_MEMBERS_BUFFER](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-samr/225147b1-45b7-4fde-a5bf-bf420e18fa08)
+      class SamprGetMembersBuffer < Ndr::NdrStruct
+        default_parameter byte_align: 4
+
+        ndr_uint32            :member_count
+        ndr_uint32_conf_array_ptr  :members,    type: :ndr_uint32
+        ndr_uint32_conf_array_ptr  :attributes, type: :ndr_uint32 
+      end
+
+      class PsamprGetMembersBuffer < SamprGetMembersBuffer
+        extend Ndr::PointerClassPlugin
+      end
+
+      # [2.1.5.8.3 SamrGetMembersInGroup (Opnum 25)](https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-samr/a4adbf20-040f-4416-a960-e5b7917fdae7)
+      class SamrGetMembersInGroupResponse < BinData::Record
+        attr_reader :opnum
+
+        endian :little
+
+        psampr_get_members_buffer :members
+        ndr_uint32               :error_status
+
+        def initialize_instance
+          super
+          @opnum = SAMR_GET_GROUPS_FOR_USER
+        end
+      end
+    end
+  end
+end
+

lib/ruby_smb/dcerpc/samr/samr_open_group_request.rb

@@ -0,0 +1,26 @@
+module RubySMB
+  module Dcerpc
+    module Samr
+
+      # [3.1.5.1.7 SamrOpenGroup (Opnum 19)](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-samr/d396e6c9-d04a-4729-b0d8-f50f2748f3c8)
+      class SamrOpenGroupRequest < BinData::Record
+        attr_reader :opnum
+
+        endian :little
+
+        sampr_handle :domain_handle
+        # Access control on a server object: bitwise OR of common ACCESS_MASK
+        # and user ACCESS_MASK values (see lib/ruby_smb/dcerpc/samr.rb)
+        ndr_uint32   :desired_access
+        ndr_uint32   :group_id
+
+        def initialize_instance
+          super
+          @opnum = SAMR_OPEN_GROUP
+        end
+      end
+
+    end
+  end
+end
+

lib/ruby_smb/dcerpc/samr/samr_open_group_response.rb

@@ -0,0 +1,24 @@
+module RubySMB
+  module Dcerpc
+    module Samr
+
+      # [3.1.5.1.7 SamrOpenGroup (Opnum 19)](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-samr/d396e6c9-d04a-4729-b0d8-f50f2748f3c8)
+      class SamrOpenGroupResponse < BinData::Record
+        attr_reader :opnum
+
+        endian :little
+
+        sampr_handle :group_handle
+        ndr_uint32   :error_status
+
+        def initialize_instance
+          super
+          @opnum = SAMR_OPEN_GROUP
+        end
+      end
+
+    end
+  end
+end
+
+