statusdeamon auf configparser umgestellt. dank an ndo
This commit is contained in:
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commit
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3 changed files with 152 additions and 232 deletions
32
statusd.conf
32
statusd.conf
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@ -3,25 +3,19 @@
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# Configuration file for the server, who is manage the api for door status
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# Configuration file for the server, who is manage the api for door status
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# from krautspace jena.
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# from krautspace jena.
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# host, where server lives (string with fqdn or ipv4). default ist
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[general]
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# localhost.
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timeout = 5.0
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HOST = '127.0.0.1'
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loglevel = debug
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# port, where the server is listen. default is 100001
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[server]
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PORT = 10001
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host = localhost
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port = 10001
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cert = ./certs/server.crt
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key = ./certs/server.key
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# timeout for connection
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[client]
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TIMEOUT = 5
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cert = ./certs/client.crt
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# path for ssl keys and certificates. default is the current directory.
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[api]
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SERVER_CERT = './certs/server.crt'
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api = ./api
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SERVER_KEY = './certs/server.key'
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template = ./api_template
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CLIENT_CERT = './certs/client.crt'
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# path to api files
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API_TEMPLATE = './api_template'
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API = './api'
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# loglevel (maybe CRITICAL(50), ERROR(40), WARNING(30), INFO(20), DEBUG(10))
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# default is warning
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VERBOSITY = 'debug'
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@ -1,26 +0,0 @@
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# file: statusd.conf
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# Configuration file for the server, who is manage the api for door status
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# from krautspace jena.
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# host, where server lives (string with fqdn or ipv4). default ist
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# localhost.
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HOST = 'localhost'
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# port, where the server is listen. default is 100001
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PORT = 10001
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# timeout for connection
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TIMEOUT = 5
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# path for ssl keys and certificates. default is the current directory.
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SERVER_CERT = './server.crt'
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SERVER_KEY = './server.key'
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CLIENT_CERT = './client.crt'
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# path to api files
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API_TEMPLATE = './api_template'
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API = '/path/to//api'
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# loglevel (maybe ERROR, INFO, DEBUG) - not implementet at the moment.
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VERBOSITY = 'info'
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272
statusd.py
Executable file → Normal file
272
statusd.py
Executable file → Normal file
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@ -4,44 +4,18 @@
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# date: 26.07.2019
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# date: 26.07.2019
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# email: berhsi@web.de
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# email: berhsi@web.de
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# server, which listens for ipv4 connections at port 10001. now with ssl
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# Status server, listening for door status updates. The IPv4 address and port
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# encrypted connection and client side authentication.
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# to listen on are configurable, by default localhost:10001 is used. The
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# connection is secured by TLS and client side authentication.
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import json
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import logging
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import os
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import socket
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import socket
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import ssl
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import ssl
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import os
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import sys
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import logging
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import json
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from time import time, sleep
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from time import time, sleep
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from sys import exit
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import configparser
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def read_config(CONFIGFILE, CONFIG):
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'''
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reads the given config file and sets the values are founded.
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param 1: string
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param 2: dictionary
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return: boolean
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'''
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logging.debug('Read configfile {}'.format(CONFIGFILE))
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if os.access(CONFIGFILE, os.R_OK):
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logging.debug('Configfile is readable')
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with open(CONFIGFILE, 'r') as config:
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logging.debug('Configfile successfull read')
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for line in config.readlines():
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if not line[0] in ('#', ';', '\n', '\r'):
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key, value = (line.strip().split('='))
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key = strip_argument(key).upper()
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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:
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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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return False
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return True
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def certs_readable(config):
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def certs_readable(config):
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@ -51,42 +25,28 @@ def certs_readable(config):
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param 1: dictionary
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param 1: dictionary
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return: boolean
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return: boolean
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'''
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'''
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for i in (config['SERVER_KEY'], config['SERVER_CERT'],
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for i in (config['server']['key'], config['server']['cert'],
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config['CLIENT_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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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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logging.error('Cannot read {}'.format(i))
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return False
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return False
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return True
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return True
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def strip_argument(argument):
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def print_config(config):
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'''
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'''
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Becomes a string and strips at first whitespaces, second apostrops and
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Logs the config with level debug.
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returns the clear string.
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param 1: string
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return: string
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'''
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argument = argument.strip()
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argument = argument.strip('"')
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argument = argument.strip("'")
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return argument
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def print_config(CONFIG):
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'''
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Prints the used configuration, if loglevel ist debug.
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param 1: dictionary
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return: boolean (allways true)
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'''
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'''
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logging.debug('Using config:')
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logging.debug('Using config:')
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for i in CONFIG.keys():
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for section in config.sections():
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logging.debug('{}: {}'.format(i, CONFIG[i]))
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logging.debug('Section {}'.format(section))
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return True
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for i in config[section]:
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logging.debug(' {}: {}'.format(i, config[section][i]))
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def print_ciphers(cipherlist):
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def print_ciphers(cipherlist):
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'''
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'''
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This function prints the list of the allowed ciphers.
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Prints the list of allowed ciphers.
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param1: dictionary
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param1: dictionary
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return: boolean
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return: boolean
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'''
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'''
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@ -96,12 +56,11 @@ def print_ciphers(cipherlist):
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for j in i.keys():
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for j in i.keys():
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print('{}: {}'.format(j, i[j]))
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print('{}: {}'.format(j, i[j]))
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print('\n')
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print('\n')
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return True
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def display_peercert(cert):
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def display_peercert(cert):
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'''
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'''
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This function displays the values of a given certificate.
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Displays the values of a given certificate.
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param1: dictionary
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param1: dictionary
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return: boolean
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return: boolean
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'''
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'''
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@ -112,36 +71,36 @@ def display_peercert(cert):
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print('\t{}'.format(j))
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print('\t{}'.format(j))
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else:
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else:
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print('\t{}'.format(cert[i]))
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print('\t{}'.format(cert[i]))
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return True
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def receive_buffer_is_valid(raw_data):
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def receive_buffer_is_valid(raw_data):
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'''
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'''
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checks, if the received buffer from the connection is valid or not.
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Checks validity of the received buffer contents.
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param 1: byte
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param 1: byte
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return: boolean
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return: boolean
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'''
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'''
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if raw_data == b'\x00' or raw_data == b'\x01':
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if raw_data in (b'\x00', b'\x01'):
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logging.debug('Argument is valid: {}'.format(raw_data))
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logging.debug('Argument is valid: {}'.format(raw_data))
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return True
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return True
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else:
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logging.debug('Argument is not valid: {}'.format(raw_data))
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logging.debug('Argument is not valid: {}'.format(raw_data))
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return False
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return False
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def change_status(raw_data, api):
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def change_status(raw_data, api):
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'''
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'''
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Becomes the received byte and the path to API file. Grabs the content of
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Write the new status together with a timestamp into the Space API JSON.
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the API with read_api() and replaces "open" and "lastchange". Write all
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lines back to API file.
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param 1: byte
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param 1: byte
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param 2: string
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param 2: string
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return: boolean
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return: boolean
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'''
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'''
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logging.debug('Change status API')
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logging.debug('Change status API')
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# todo: use walrus operator := when migrating to python >= 3.8
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data = read_api(api)
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data = read_api(api)
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if data is not False:
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if data is False:
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return False
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status, timestamp = set_values(raw_data)
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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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if os.access(api, os.W_OK):
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logging.debug('API file is writable')
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logging.debug('API file is writable')
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@ -160,30 +119,33 @@ def change_status(raw_data, api):
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return False
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return False
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logging.info('Status successfull changed to {}'.format(status))
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logging.info('Status successfull changed to {}'.format(status))
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return True
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return True
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return False
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def read_api(api):
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def read_api(api):
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'''
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'''
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Reads the API file in an buffer und returns the buffer. If anything goes
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Reads the Space API JSON into a dict. Returns the dict on success and
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wrong, it returns False - otherwise it returns the buffer.
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False on failure.
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param 1: string
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param 1: string
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return: string or boolean
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return: dict or boolean
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'''
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'''
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logging.debug('Open API file: {}'.format(api))
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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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# return early if the API JSON cannot be read
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if not os.access(api, os.R_OK):
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logging.error('Failed to read API file')
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return False
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logging.debug('API is readable')
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logging.debug('API is readable')
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with open(api, 'r') as api_file:
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with open(api, 'r') as api_file:
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logging.debug('API opened successfull')
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logging.debug('API file successfully opened')
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try:
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try:
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api_json_data = json.load(api_file)
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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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logging.debug('API file read successfull')
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except Exception as e:
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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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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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return False
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return api_json_data
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def set_values(raw_data):
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def set_values(raw_data):
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@ -193,45 +155,21 @@ def set_values(raw_data):
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param 1: byte
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param 1: byte
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return: tuple
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return: tuple
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'''
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'''
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status = "true" if raw_data == b'\x01' else "false"
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timestamp = str(time()).split('.')[0]
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timestamp = str(time()).split('.')[0]
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if raw_data == b'\x01':
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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(
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logging.debug('Set values for timestamp: {} and status: {}'.format(
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timestamp, status))
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timestamp, status))
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return (status, timestamp)
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return (status, timestamp)
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def read_loglevel(CONFIG):
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'''
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The function translates the value string from config verbosity option to
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a valid logging option.
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param1: dictionary
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return: boolean or integer
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'''
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if CONFIG['VERBOSITY'] == 'critical':
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loglevel = logging.CRITICAL
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elif CONFIG['VERBOSITY'] == 'error':
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loglevel = logging.ERROR
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elif CONFIG['VERBOSITY'] == 'warning':
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loglevel = logging.WARNING
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elif CONFIG['VERBOSITY'] == 'info':
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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:
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loglevel = False
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return(loglevel)
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def main():
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def main():
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'''
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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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The main function - open a socket, create a ssl context, load certs and
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listen for connections. at ssl context we set only one available cipher
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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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suite and disable compression.
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OP_NO_COMPRESSION: prevention against crime attack
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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
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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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(cve-2011-3389)
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'''
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'''
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@ -239,90 +177,105 @@ def main():
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formatstring = '%(asctime)s: %(levelname)s: %(message)s'
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formatstring = '%(asctime)s: %(levelname)s: %(message)s'
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logging.basicConfig(format=formatstring, level=loglevel)
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logging.basicConfig(format=formatstring, level=loglevel)
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CONFIG = {
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default_config = {
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'HOST': 'localhost',
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'general': {
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'PORT': 10001,
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'timeout': 3.0,
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'SERVER_CERT': './server.crt',
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'loglevel': 'warning'
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'SERVER_KEY': './server.key',
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},
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'CLIENT_CERT': './client.crt',
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'server': {
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'TIMEOUT': 3.0,
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'host': 'localhost',
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'API': './api',
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'port': 10001,
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'API_TEMPLATE': './api_template',
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'cert': './certs/server.crt',
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'VERBOSITY': 'warning'
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'key': './certs/server.key'
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},
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'client': {
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'cert': './certs/client.crt'
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},
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'api': {
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'api': './api',
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'template': './api_template'
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}
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}
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CONFIG_FILE = './statusd.conf'
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}
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read_config(CONFIG_FILE, CONFIG)
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configfile = './statusd.conf'
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loglevel = read_loglevel(CONFIG)
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config = configparser.ConfigParser()
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if loglevel is not False:
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config.read_dict(default_config)
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logger = logging.getLogger()
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if not config.read(configfile):
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logger.setLevel(loglevel)
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logging.warning('Configuration file %s not found or not readable. Using default values.',
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else:
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configfile)
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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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logging.warning('Invalid value for loglevel. Set default value')
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print_config(CONFIG)
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logger = logging.getLogger()
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if not config['general']['loglevel'] in ('critical', 'error', 'warning', 'info', 'debug'):
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logging.warning('Invalid loglevel %s given. Using default level %s.',
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config['general']['loglevel'],
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default_config['general']['loglevel'])
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config.set('general', 'loglevel', default_config['general']['loglevel'])
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logger.setLevel(config['general']['loglevel'].upper())
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print_config(config)
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# todo: zertifikate sollten nur lesbar sein!
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# todo: zertifikate sollten nur lesbar sein!
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if not certs_readable(config):
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if certs_readable(CONFIG) is False:
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logging.error('Cert check failed\nExit')
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logging.error('Cert check failed\nExit')
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exit()
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sys.exit(1)
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context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
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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.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.set_ciphers('EECDH+AESGCM') # only ciphers for tls 1.2 and 1.3
|
context.set_ciphers('EECDH+AESGCM') # only ciphers for tls 1.2 and 1.3
|
||||||
context.options = ssl.OP_CIPHER_SERVER_PREFERENCE
|
context.options = ssl.OP_CIPHER_SERVER_PREFERENCE
|
||||||
# ssl + kompression = schlecht
|
# ensure, compression is disabled (disabled by default anyway at the moment)
|
||||||
context.options |= getattr(ssl._ssl, 'OP_NO_COMPRESSION', 0)
|
context.options |= ssl.OP_NO_COMPRESSION
|
||||||
logging.debug('SSL context created')
|
logging.debug('SSL context created')
|
||||||
# print_ciphers(context.get_ciphers())
|
# print_ciphers(context.get_ciphers())
|
||||||
|
|
||||||
with socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) as mySocket:
|
with socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) as mySocket:
|
||||||
logging.debug('Socket created')
|
logging.debug('Socket created')
|
||||||
try:
|
try:
|
||||||
mySocket.bind((CONFIG['HOST'], int(CONFIG['PORT'])))
|
mySocket.bind((config['server']['host'], int(config['server']['port'])))
|
||||||
mySocket.listen(5)
|
mySocket.listen(5)
|
||||||
logging.info('Listen on {} at Port {}'.format(CONFIG['HOST'],
|
logging.info('Listening on {} at Port {}'.format(config['server']['host'],
|
||||||
CONFIG['PORT']))
|
config['server']['port']))
|
||||||
except Exception as e:
|
except Exception as e:
|
||||||
logging.error('unable to bind and listen')
|
logging.error('Unable to bind and listen')
|
||||||
logging.error('{}'.format(e))
|
logging.error('{}'.format(e))
|
||||||
exit()
|
sys.exit(1)
|
||||||
|
|
||||||
while True:
|
while True:
|
||||||
try:
|
try:
|
||||||
fromSocket, fromAddr = mySocket.accept()
|
fromSocket, fromAddr = mySocket.accept()
|
||||||
logging.info('Client connected: {}:{}'.format(fromAddr[0],
|
logging.info('Client connected: {}:{}'.format(fromAddr[0], fromAddr[1]))
|
||||||
fromAddr[1]))
|
|
||||||
try:
|
try:
|
||||||
fromSocket.settimeout(float(CONFIG['TIMEOUT']))
|
fromSocket.settimeout(float(config['general']['timeout']))
|
||||||
logging.debug('Connection timeout set to {}'.format(
|
logging.debug('Connection timeout set to {}'.format(
|
||||||
CONFIG['TIMEOUT']))
|
config['general']['timeout']))
|
||||||
except Exception:
|
except Exception:
|
||||||
logging.error('Canot set timeout to {}'.format(
|
logging.error('Cannot set timeout to {}'.format(
|
||||||
CONFIG['TIMEOUT']))
|
config['general']['timeout']))
|
||||||
logging.error('Use default value: 3.0')
|
logging.error('Using default value {}'.format(
|
||||||
fromSocket.settimeout(3.0)
|
config['general']['timeout']))
|
||||||
|
fromSocket.settimeout(config['general']['timeout'])
|
||||||
|
|
||||||
try:
|
try:
|
||||||
conn = context.wrap_socket(fromSocket, server_side=True)
|
conn = context.wrap_socket(fromSocket, server_side=True)
|
||||||
conn.settimeout(3.0)
|
conn.settimeout(config['general']['timeout'])
|
||||||
# display_peercert(conn.getpeercert())
|
# display_peercert(conn.getpeercert())
|
||||||
logging.debug('Connection established')
|
logging.debug('Connection established')
|
||||||
logging.debug('Peer certificate commonName: {}'.format
|
logging.debug('Peer certificate commonName: {}'.format(
|
||||||
(conn.getpeercert()['subject'][5][0][1]))
|
conn.getpeercert()['subject'][5][0][1]))
|
||||||
logging.debug('Peer certificate serialNumber: {}'.format
|
logging.debug('Peer certificate serialNumber: {}'.format(
|
||||||
(conn.getpeercert()['serialNumber']))
|
conn.getpeercert()['serialNumber']))
|
||||||
except socket.timeout:
|
except socket.timeout:
|
||||||
logging.error('Socket timeout')
|
logging.error('Socket timeout')
|
||||||
except Exception as e:
|
except Exception as e:
|
||||||
logging.error('Connection failed: {}'.format(e))
|
logging.error('Connection failed: {}'.format(e))
|
||||||
|
|
||||||
raw_data = conn.recv(1)
|
raw_data = conn.recv(1)
|
||||||
if receive_buffer_is_valid(raw_data) is True:
|
if receive_buffer_is_valid(raw_data) is True:
|
||||||
if change_status(raw_data, CONFIG['API']) is True:
|
if change_status(raw_data, config['api']['api']) is True:
|
||||||
logging.debug('Send {} back'.format(raw_data))
|
logging.debug('Send {} back'.format(raw_data))
|
||||||
conn.send(raw_data)
|
conn.send(raw_data)
|
||||||
# change_status returns false:
|
# change_status returns false:
|
||||||
|
@ -332,15 +285,14 @@ def main():
|
||||||
conn.send(b'\x03')
|
conn.send(b'\x03')
|
||||||
# receive_handle returns false:
|
# receive_handle returns false:
|
||||||
else:
|
else:
|
||||||
logging.info('Invalid argument recived: {}'.format(
|
logging.info('Invalid argument received: {}'.format(raw_data))
|
||||||
raw_data))
|
|
||||||
logging.debug('Send {} back'.format(b'\x03'))
|
logging.debug('Send {} back'.format(b'\x03'))
|
||||||
if conn:
|
if conn:
|
||||||
conn.send(b'\x03')
|
conn.send(b'\x03')
|
||||||
sleep(0.1) # protection against dos
|
sleep(0.1) # protection against dos
|
||||||
except KeyboardInterrupt:
|
except KeyboardInterrupt:
|
||||||
logging.info('Exit')
|
logging.info('Exit')
|
||||||
exit()
|
sys.exit(1)
|
||||||
except Exception as e:
|
except Exception as e:
|
||||||
logging.error('{}'.format(e))
|
logging.error('{}'.format(e))
|
||||||
continue
|
continue
|
||||||
|
|
Loading…
Reference in a new issue