Remove usage of pkg_resources (fortra#2036)

* Remove usage of `pkg_resources`

Currently, a warning is emitted on each run:

    UserWarning: pkg_resources is deprecated as an API. See
    https://setuptools.pypa.io/en/latest/pkg_resources.html. The
    pkg_resources package is slated for removal as early as 2025-11-30.
    Refrain from using this package or pin to Setuptools<81.

This patch removes all usage of that package.

Fixes fortra#1645.

* Add necessary dependencies to setup.py and requirements.txt

* Remove fallback to `importlib_resources`

Author: AdrianVollmer

impacket/examples/ntlmrelayx/attacks/__init__.py

@@ -17,7 +17,7 @@
 #  Dirk-jan Mollema (@_dirkjan) / Fox-IT (https://www.fox-it.com)
 #
 import os, sys
-import pkg_resources
+from importlib.resources import files
 from impacket import LOG
 from threading import Thread
 
@@ -47,7 +47,8 @@ def __init__(self, config, client, username):
     def run(self):
         raise RuntimeError('Virtual Function')
 
-for file in pkg_resources.resource_listdir('impacket.examples.ntlmrelayx', 'attacks'):
+attacks_path = files('impacket.examples.ntlmrelayx').joinpath('attacks')
+for file in [f.name for f in attacks_path.iterdir() if f.is_file()]:
     if file.find('__') >= 0 or file.endswith('.py') is False:
         continue
     # This seems to be None in some case (py3 only)

impacket/examples/ntlmrelayx/clients/__init__.py

@@ -15,7 +15,8 @@
 # Author:
 #   Alberto Solino (@agsolino)
 #
-import os, sys, pkg_resources
+import os, sys
+from importlib.resources import files
 from impacket import LOG
 
 PROTOCOL_CLIENTS = {}
@@ -94,7 +95,8 @@ def isAdmin(self):
         # By default, raise exception
         raise RuntimeError('Virtual Function')
 
-for file in pkg_resources.resource_listdir('impacket.examples.ntlmrelayx', 'clients'):
+clients_path = files('impacket.examples.ntlmrelayx').joinpath('clients')
+for file in [f.name for f in clients_path.iterdir() if f.is_file()]:
     if file.find('__') >= 0 or file.endswith('.py') is False:
         continue
     # This seems to be None in some case (py3 only)

impacket/examples/ntlmrelayx/servers/socksplugins/__init__.py

@@ -10,11 +10,12 @@
 #
 import os
 import sys
-import pkg_resources
+from importlib.resources import files
 
 SOCKS_RELAYS = set()
 
-for file in pkg_resources.resource_listdir('impacket.examples.ntlmrelayx.servers', 'socksplugins'):
+socksplugins_path = files('impacket.examples.ntlmrelayx.servers').joinpath('socksplugins')
+for file in [f.name for f in socksplugins_path.iterdir() if f.is_file()]:
     if file.find('__') >= 0 or file.endswith('.py') is False:
         continue
     # This seems to be None in some case (py3 only)

impacket/version.py

@@ -9,13 +9,13 @@
 # for more information.
 #
 
-import pkg_resources
+from importlib.metadata import version as get_version, PackageNotFoundError
 from impacket import __path__
 
 
 try:
-    version = pkg_resources.get_distribution('impacket').version
-except pkg_resources.DistributionNotFound:
+    version = get_version('impacket')
+except PackageNotFoundError:
     version = "?"
     print("Cannot determine Impacket version. "
           "If running from source you should at least run \"python setup.py egg_info\"")