Make failing username dynamic

Author: kholia

modules/auxiliary/server/capture/postgresql.rb

@@ -89,22 +89,21 @@ def on_client_data(c)
 				:active => true
 			)
 			print_status("PostgreSQL LOGIN #{@state[c][:name]} #{@state[c][:username]} / #{@state[c][:password]} / #{@state[c][:database]}")
-			# send failure message, currently the failing username is always "postgres"
-			# TODO: make failing username dynamic!
+			# send failure message
 			sdata = [
-				0x45, 0x00, 0x00, 0x00, 0x61, 0x53, 0x46, 0x41,
-				0x54, 0x41, 0x4c, 0x00, 0x43, 0x32, 0x38, 0x50,
-				0x30, 0x31, 0x00, 0x4d, 0x70, 0x61, 0x73, 0x73,
-				0x77, 0x6f, 0x72, 0x64, 0x20, 0x61, 0x75, 0x74,
-				0x68, 0x65, 0x6e, 0x74, 0x69, 0x63, 0x61, 0x74,
-				0x69, 0x6f, 0x6e, 0x20, 0x66, 0x61, 0x69, 0x6c,
-				0x65, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20, 0x75,
-				0x73, 0x65, 0x72, 0x20, 0x22, 0x70, 0x6f, 0x73,
-				0x74, 0x67, 0x72, 0x65, 0x73, 0x22, 0x00, 0x46,
-				0x61, 0x75, 0x74, 0x68, 0x2e, 0x63, 0x00, 0x4c,
-				0x33, 0x30, 0x32, 0x00, 0x52, 0x61, 0x75, 0x74,
-				0x68, 0x5f, 0x66, 0x61, 0x69, 0x6c, 0x65, 0x64,
-				0x00, 0x00].pack("C" * 98)
+				0x45, 97 - 8 + @state[c][:username].length, 0x53,
+				0x46, 0x41, 0x54, 0x41, 0x4c, 0x00, 0x43, 0x32,
+				0x38, 0x50, 0x30, 0x31, 0x00, 0x4d, 0x70, 0x61,
+				0x73, 0x73, 0x77, 0x6f, 0x72, 0x64, 0x20, 0x61,
+				0x75, 0x74, 0x68, 0x65, 0x6e, 0x74, 0x69, 0x63,
+				0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x66, 0x61,
+				0x69, 0x6c, 0x65, 0x64, 0x20, 0x66, 0x6f, 0x72,
+				0x20, 0x75, 0x73, 0x65, 0x72, 0x20, 0x22
+			].pack("CN" + "C" * 56) + @state[c][:username] +
+				[ 0x22, 0x00, 0x46, 0x61, 0x75, 0x74, 0x68, 0x2e,
+				0x63, 0x00, 0x4c, 0x33, 0x30, 0x32, 0x00,
+				0x52, 0x61, 0x75, 0x74, 0x68, 0x5f, 0x66,
+				0x61, 0x69, 0x6c, 0x65, 0x64, 0x00, 0x00 ].pack("C" * 29)
 			c.put sdata
 			c.close
 		end