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Create get_cert_info.py
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'''
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This script takes a domain as input and returns the SSL certificate information of the domain.
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Author: Omar Santos @santosomar
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'''
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# Import the necessary modules
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import ssl
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import socket
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from pprint import pprint
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import argparse
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def get_certificate_info(hostname, port=443):
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'''
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get certificate information
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:param hostname: hostname
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:param port: port
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:return: None
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'''
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context = ssl.create_default_context()
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conn = context.wrap_socket(socket.socket(socket.AF_INET), server_hostname=hostname)
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conn.settimeout(3.0)
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try:
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conn.connect((hostname, port))
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cert = conn.getpeercert()
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pprint(cert)
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except Exception as e:
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print(f"Could not retrieve certificate information: {e}")
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finally:
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conn.close()
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if __name__ == "__main__":
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# Parse the command line arguments
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parser = argparse.ArgumentParser(description='Get SSL certificate information of a domain.')
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parser.add_argument('domain', type=str, help='Domain name to get the certificate information')
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parser.add_argument('--port', type=int, default=443, help='Port number (default: 443)')
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args = parser.parse_args()
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get_certificate_info(args.domain, args.port)
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