From f92551e9dcd46b4ac6e2dc00751db8eed56cd260 Mon Sep 17 00:00:00 2001
From: JJ <jjripaper@imqnavarra.com>
Date: Wed, 5 Feb 2025 10:46:08 +0100
Subject: [PATCH] =?UTF-8?q?Comprobar=20fecha=20expiraci=C3=B3n=20certifica?=
 =?UTF-8?q?do.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 cert_expiration_date.py | 44 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 cert_expiration_date.py

diff --git a/cert_expiration_date.py b/cert_expiration_date.py
new file mode 100644
index 0000000..bb381bd
--- /dev/null
+++ b/cert_expiration_date.py
@@ -0,0 +1,44 @@
+import ssl
+import socket
+import sys
+from datetime import datetime
+
+def check_certificate_expiry(hostname, port=443):
+    try:
+        # Crear un contexto SSL
+        context = ssl.create_default_context()
+        
+        # Conectar al servidor y obtener el certificado
+        with socket.create_connection((hostname, port)) as sock:
+            with context.wrap_socket(sock, server_hostname=hostname) as ssock:
+                cert = ssock.getpeercert()
+        
+        # Obtener la fecha de expiración del certificado
+        expiry_date = datetime.strptime(cert['notAfter'], '%b %d %H:%M:%S %Y %Z')
+        
+        # Obtener la fecha actual
+        current_date = datetime.utcnow()
+        
+        # Calcular la diferencia en días
+        delta = expiry_date - current_date
+        days_until_expiry = delta.days
+        
+        # Verificar si el certificado está a menos de 20 días de caducar
+        if days_until_expiry < 20:
+            print(f"CRITICAL: El certificado de {hostname} caduca en {days_until_expiry} días.")
+            sys.exit(2)
+        else:
+            print(f"OK: El certificado de {hostname} caduca en {days_until_expiry} días.")
+            sys.exit(0)
+    
+    except Exception as e:
+        print(f"UNKNOWN: Error al verificar el certificado de {hostname}: {e}")
+        sys.exit(3)
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print("Uso: python check_certificate.py <hostname>")
+        sys.exit(1)
+    
+    hostname = sys.argv[1]
+    check_certificate_expiry(hostname)
\ No newline at end of file