From 1dc78c2bf6f449a89d48387ceea5e6de98a29c3a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marius=20G=C3=B6cke?= <marius.goecke@gmail.com>
Date: Sat, 21 Jan 2023 17:46:57 +0100
Subject: [PATCH] added get_certificate_expiry_date and certificate_is_expired

---
 .vscode/spellright.dict                         |  1 +
 License.txt                                     |  1 +
 .../ScriptCollection/GeneralUtilities.py        | 17 +++++++++++++++++
 ScriptCollection/requirements.txt               |  1 +
 ScriptCollection/setup.cfg                      |  1 +
 5 files changed, 21 insertions(+)

diff --git a/.vscode/spellright.dict b/.vscode/spellright.dict
index 519d1523..487a7fc2 100644
--- a/.vscode/spellright.dict
+++ b/.vscode/spellright.dict
@@ -35,3 +35,4 @@ docfx
 cyclonedx
 gitversion
 dockerfile
+pyOpenSSL
diff --git a/License.txt b/License.txt
index af9d4d07..b30359e3 100644
--- a/License.txt
+++ b/License.txt
@@ -6,6 +6,7 @@ ScriptCollection uses dependencies which are released under their own license:
 -keyboard is licensed under the terms of the MIT-license (see appendix 1)
 -lxml is licensed under the terms of the BSD-license (see https://pypi.org/project/lxml )
 -ntplib is licensed under the terms of the MIT-license (see appendix 1)
+-pyOpenSSL is licensed under the terms of the Apache License, Version 2.0-license (see https://raw.githubusercontent.com/pyca/pyopenssl/main/LICENSE )
 -PyPDF2 is licensed under the terms of its own license (see appendix 2)
 -pycdlib is licensed under the terms of the LGPL-v2.1-license (see appendix 3)
 -qrcode is licensed under the terms of the BSD-license (see https://pypi.org/project/qrcode )
diff --git a/ScriptCollection/ScriptCollection/GeneralUtilities.py b/ScriptCollection/ScriptCollection/GeneralUtilities.py
index 5c8280f3..8f771b0f 100644
--- a/ScriptCollection/ScriptCollection/GeneralUtilities.py
+++ b/ScriptCollection/ScriptCollection/GeneralUtilities.py
@@ -17,6 +17,7 @@
 from shutil import copyfile
 import typing
 from defusedxml.minidom import parse
+from OpenSSL import crypto
 
 
 class GeneralUtilities:
@@ -791,3 +792,19 @@ def generate_password(length: int = 16, alphabet: str = None) -> None:
     def assert_condition(condition: bool, information: str) -> None:
         if (not condition):
             raise ValueError("Condition failed. "+information)
+
+    @staticmethod
+    @check_arguments
+    def get_certificate_expiry_date(certificate_file: str) -> datetime:
+        with open(certificate_file, encoding="utf-8") as certificate_file_content:
+            cert = crypto.load_certificate(crypto.FILETYPE_PEM, certificate_file_content.read())
+            date_as_bytes = cert.get_notAfter()
+            date_as_string = date_as_bytes.decode("utf-8")
+            result = datetime.strptime(date_as_string, '%Y%m%d%H%M%SZ')
+            return result
+
+
+    @staticmethod
+    @check_arguments
+    def certificate_is_expired(certificate_file: str) -> bool:
+        return GeneralUtilities.get_certificate_expiry_date(certificate_file) < datetime.now()
diff --git a/ScriptCollection/requirements.txt b/ScriptCollection/requirements.txt
index f3a46d64..1c0488c9 100644
--- a/ScriptCollection/requirements.txt
+++ b/ScriptCollection/requirements.txt
@@ -7,6 +7,7 @@ lxml
 ntplib>=0.4.0
 pycdlib>=1.13.0
 pylint>=2.15.10
+pyOpenSSL>=23.0.0
 PyPDF2>=3.0.1
 pytest>=7.2.1
 qrcode>=7.3.1
diff --git a/ScriptCollection/setup.cfg b/ScriptCollection/setup.cfg
index c341ec3b..0238da65 100644
--- a/ScriptCollection/setup.cfg
+++ b/ScriptCollection/setup.cfg
@@ -40,6 +40,7 @@ install_requires =
      ntplib>=0.4.0
      pycdlib>=1.13.0
      pylint>=2.15.10
+     pyOpenSSL>=23.0.0
      PyPDF2>=3.0.1
      pytest>=7.2.1
      qrcode>=7.3.1