forked from berhsi/doorstatus
statusd.py: delete unused parts, make it pep8 conform
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berhsi
parent
c60bb326cc
commit
1fbd95facf
95
statusd.py
95
statusd.py
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@ -12,7 +12,7 @@ import ssl
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import os
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import logging
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import json
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from time import time, ctime, sleep
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from time import time, sleep
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from sys import exit
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@ -35,7 +35,8 @@ def read_config(CONFIGFILE, CONFIG):
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if key in CONFIG.keys():
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value = strip_argument(value)
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CONFIG[key] = value
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else: pass
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else:
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pass
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else:
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logging.error('Failed to read {}'.format(CONFIGFILE))
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logging.error('Using default values')
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@ -45,12 +46,14 @@ def read_config(CONFIGFILE, CONFIG):
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def certs_readable(config):
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'''
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checks at start, if the needed certificates defined (no nullstring) and readable.
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checks at start, if the needed certificates defined (no nullstring) and
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readable.
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param 1: dictionary
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return: boolean
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'''
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for i in (config['SERVER_KEY'], config['SERVER_CERT'], config['CLIENT_CERT']):
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if i == '' or os.access(i, os.R_OK) == False:
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for i in (config['SERVER_KEY'], config['SERVER_CERT'],
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config['CLIENT_CERT']):
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if i == '' or os.access(i, os.R_OK) is False:
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logging.error('Cant read {}'.format(i))
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return False
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return True
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@ -135,11 +138,10 @@ def change_status(raw_data, api):
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param 2: string
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return: boolean
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'''
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edit = False
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logging.debug('Change status API')
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data = read_api(api)
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if data != False:
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if data is not False:
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status, timestamp = set_values(raw_data)
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if os.access(api, os.W_OK):
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logging.debug('API file is writable')
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@ -170,19 +172,19 @@ def read_api(api):
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'''
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logging.debug('Open API file: {}'.format(api))
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if os.access(api, os.R_OK):
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logging.debug('API is readable')
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with open(api, 'r') as api_file:
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logging.debug('API opened successfull')
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try:
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api_json_data = json.load(api_file)
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logging.debug('API file read successfull')
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except Exception as e:
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logging.error('Failed to read API file(): {}'.format(e))
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return False
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return (api_json_data)
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logging.debug('API is readable')
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with open(api, 'r') as api_file:
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logging.debug('API opened successfull')
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try:
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api_json_data = json.load(api_file)
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logging.debug('API file read successfull')
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except Exception as e:
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logging.error('Failed to read API file(): {}'.format(e))
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return False
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return (api_json_data)
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logging.error('Failed to read API file')
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return False
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def set_values(raw_data):
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'''
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@ -196,7 +198,8 @@ def set_values(raw_data):
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status = "true"
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else:
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status = "false"
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logging.debug('Set values for timestamp: {} and status: {}'.format(timestamp, status))
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logging.debug('Set values for timestamp: {} and status: {}'.format(
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timestamp, status))
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return (status, timestamp)
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@ -217,18 +220,19 @@ def read_loglevel(CONFIG):
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loglevel = logging.INFO
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elif CONFIG['VERBOSITY'] == 'debug':
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loglevel = logging.DEBUG
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else: loglevel = False
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else:
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loglevel = False
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return(loglevel)
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def main():
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'''
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The main function - opens a socket, create a ssl context, load certs and
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listen for connections. at ssl context we set some security options like
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OP_NO_SSLv2 (SSLv3): they are insecure
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PROTOCOL_TLS: only use tls
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listen for connections. at ssl context we set only one available cipher
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suite and disable compression.
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OP_NO_COMPRESSION: prevention against crime attack
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OP_DONT_ISERT_EMPTY_FRAGMENTS: prevention agains cbc 4 attack (cve-2011-3389)
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OP_DONT_ISERT_EMPTY_FRAGMENTS: prevention agains cbc 4 attack
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(cve-2011-3389)
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'''
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loglevel = logging.WARNING
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@ -239,7 +243,7 @@ def main():
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'HOST': 'localhost',
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'PORT': 10001,
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'SERVER_CERT': './server.crt',
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'SERVER_KEY' : './server.key',
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'SERVER_KEY': './server.key',
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'CLIENT_CERT': './client.crt',
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'TIMEOUT': 3.0,
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'API': './api',
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@ -249,28 +253,28 @@ def main():
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CONFIG_FILE = './statusd.conf'
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read_config(CONFIG_FILE, CONFIG)
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loglevel = read_loglevel(CONFIG)
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if loglevel != False:
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if loglevel is not False:
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logger = logging.getLogger()
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logger.setLevel(loglevel)
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else:
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loglevel = logging.WARNING
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logger = logging.getLogger()
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logger.setLevel(loglevel)
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loggin.warning('Invalid value for loglevel. Set default value')
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logging.warning('Invalid value for loglevel. Set default value')
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print_config(CONFIG)
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# todo: zertifikate sollten nur lesbar sein!
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if certs_readable(CONFIG) == False:
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if certs_readable(CONFIG) is False:
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logging.error('Cert check failed\nExit')
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exit()
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context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
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context.verify_mode = ssl.CERT_REQUIRED
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context.load_cert_chain(certfile = CONFIG['SERVER_CERT'],
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keyfile = CONFIG['SERVER_KEY'])
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context.load_verify_locations(cafile = CONFIG['CLIENT_CERT'])
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context.load_cert_chain(certfile=CONFIG['SERVER_CERT'],
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keyfile=CONFIG['SERVER_KEY'])
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context.load_verify_locations(cafile=CONFIG['CLIENT_CERT'])
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context.set_ciphers('EECDH+AESGCM') # only ciphers for tls 1.2 and 1.3
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context.options = ssl.OP_CIPHER_SERVER_PREFERENCE
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# ssl + kompression = schlecht
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@ -283,7 +287,8 @@ def main():
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try:
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mySocket.bind((CONFIG['HOST'], int(CONFIG['PORT'])))
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mySocket.listen(5)
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logging.info('Listen on {} at Port {}'.format(CONFIG['HOST'], CONFIG['PORT']))
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logging.info('Listen on {} at Port {}'.format(CONFIG['HOST'],
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CONFIG['PORT']))
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except Exception as e:
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logging.error('unable to bind and listen')
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logging.error('{}'.format(e))
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@ -291,30 +296,33 @@ def main():
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while True:
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try:
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fromSocket, fromAddr = mySocket.accept()
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logging.info('Client connected: {}:{}'.format(fromAddr[0], fromAddr[1]))
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logging.info('Client connected: {}:{}'.format(fromAddr[0],
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fromAddr[1]))
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try:
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fromSocket.settimeout(float(CONFIG['TIMEOUT']))
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logging.debug('Connection timeout set to {}'.format(CONFIG['TIMEOUT']))
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except Exception as e:
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logging.error('Canot set timeout to {}'.format(CONFIG['TIMEOUT']))
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logging.debug('Connection timeout set to {}'.format(
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CONFIG['TIMEOUT']))
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except Exception:
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logging.error('Canot set timeout to {}'.format(
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CONFIG['TIMEOUT']))
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logging.error('Use default value: 3.0')
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fromSocket.settimeout(3.0)
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try:
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conn = context.wrap_socket(fromSocket, server_side = True)
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conn = context.wrap_socket(fromSocket, server_side=True)
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conn.settimeout(3.0)
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# display_peercert(conn.getpeercert())
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logging.debug('Connection established')
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logging.debug('Peer certificate commonName: {}'.format \
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logging.debug('Peer certificate commonName: {}'.format
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(conn.getpeercert()['subject'][5][0][1]))
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logging.debug('Peer certificate serialNumber: {}'.format \
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logging.debug('Peer certificate serialNumber: {}'.format
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(conn.getpeercert()['serialNumber']))
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except socket.timeout:
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logging.error('Socket timeout')
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except Exception as e:
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logging.error('Connection failed: {}'.format(e))
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raw_data = conn.recv(1)
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if receive_buffer_is_valid(raw_data) == True:
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if change_status(raw_data, CONFIG['API']) == True:
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if receive_buffer_is_valid(raw_data) is True:
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if change_status(raw_data, CONFIG['API']) is True:
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logging.debug('Send {} back'.format(raw_data))
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conn.send(raw_data)
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# change_status returns false:
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@ -324,11 +332,12 @@ def main():
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conn.send(b'\x03')
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# receive_handle returns false:
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else:
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logging.info('Invalid argument recived: {}'.format(raw_data))
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logging.info('Invalid argument recived: {}'.format(
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raw_data))
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logging.debug('Send {} back'.format(b'\x03'))
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if conn:
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conn.send(b'\x03')
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sleep(0.1) # protection against dos
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sleep(0.1) # protection against dos
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except KeyboardInterrupt:
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logging.info('Exit')
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exit()
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