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statusd.py: set some ssl-options

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berhsi 2019-08-02 14:20:08 +02:00
parent 8755e35584
commit 0e405f894d
1 changed files with 13 additions and 2 deletions
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15
statusd.py
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@ -204,7 +204,12 @@ def set_values(raw_data):
def main(): def main():
''' '''
The main function - opens a socket, create a ssl context, load certs and The main function - opens a socket, create a ssl context, load certs and
listen for connections. listen for connections. at ssl context we set some security options like
OP_NO_SSLv2 (SSLv3): they are insecure
PROTOCOL_TLS: only use tls
OP_NO_COMPRESSION: prevention against crime attack
OP_DONT_ISERT_EMPTY_FRAGMENTS: prevention agains cbc 4 attack (cve-2011-3389)
''' '''
CONFIG = { CONFIG = {
'HOST': 'localhost', 'HOST': 'localhost',
@ -231,12 +236,17 @@ def main():
exit() exit()
context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH) context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
context.options &= ~ssl.OP_NO_SSLv2
context.options &= ~ssl.OP_NO_SSLv3
context.options &= ~ssl.PROTOCOL_TLS context.options &= ~ssl.PROTOCOL_TLS
context.options &= ~ssl.OP_CIPHER_SERVER_PREFERENCE
# context.options &= ~ssl.OP_DONT_INSERT_EMPTY_FRAGMENTS
context.options |= getattr(ssl._ssl, 'OP_NO_COMPRESSION', 0)
# context.set_ciphers('HIGHT:!aNULL:!RC4:!DSS')
context.verify_mode = ssl.CERT_REQUIRED context.verify_mode = ssl.CERT_REQUIRED
context.load_cert_chain(certfile = CONFIG['SERVER_CERT'], context.load_cert_chain(certfile = CONFIG['SERVER_CERT'],
keyfile = CONFIG['SERVER_KEY']) keyfile = CONFIG['SERVER_KEY'])
context.load_verify_locations(cafile = CONFIG['CLIENT_CERT']) context.load_verify_locations(cafile = CONFIG['CLIENT_CERT'])
context.options &= ~ssl.OP_NO_SSLv3
logging.debug('SSL context created') logging.debug('SSL context created')
with socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) as mySocket: with socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) as mySocket:
@ -290,6 +300,7 @@ def main():
except Exception as e: except Exception as e:
logging.error('{}'.format(e)) logging.error('{}'.format(e))
continue continue
return 0
if __name__ == '__main__': if __name__ == '__main__':