From fcf0cd0a808876c7e48cbe1fb983d660da0b8ab1 Mon Sep 17 00:00:00 2001
From: Chris Mayo <aklhfex@gmail.com>
Date: Mon, 11 Mar 2024 19:33:47 +0000
Subject: [PATCH] Resolve CryptographyDeprecationWarning for not_valid_after
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linkchecker/linkcheck/httputil.py:31: CryptographyDeprecationWarning:
Properties that return a naïve datetime object have been deprecated. Please switch to not_valid_after_utc.
---
 linkcheck/httputil.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/linkcheck/httputil.py b/linkcheck/httputil.py
index b81ff723..6a9f5f14 100644
--- a/linkcheck/httputil.py
+++ b/linkcheck/httputil.py
@@ -28,7 +28,11 @@ def x509_to_dict(x509):
         'subjectAltName': [
             ('DNS', value) for value in ext.value.get_values_for_type(DNSName)]
     }
-    notAfter = crypto_cert.not_valid_after
+    try:
+        # cryptography >= 42.0.0
+        notAfter = crypto_cert.not_valid_after_utc
+    except AttributeError:
+        notAfter = crypto_cert.not_valid_after
     if notAfter is not None:
         res['notAfter'] = notAfter.strftime('%b %d %H:%M:%S %Y GMT')
     return res