statusd.py: add support for ssl
server now speaks tls. new functions strip_argument() and display_peercert()
This commit is contained in:
berhsi
parent
60fccc57d4
commit
d3534afaa3
1 changed files with 65 additions and 37 deletions
102
statusd.py
102
statusd.py
|
|
@ -4,9 +4,11 @@
|
|||
# date: 26.07.2019
|
||||
# email: berhsi@web.de
|
||||
|
||||
# server, who listen for ipv4 connections at port 10001.
|
||||
# server, who listen for ipv4 connections at port 10001. now with ssl
|
||||
# encrypted connection and client side authentication.
|
||||
|
||||
import socket
|
||||
import ssl
|
||||
import os
|
||||
import logging
|
||||
from time import time, ctime, sleep
|
||||
|
|
@ -27,10 +29,11 @@ def read_config(CONFIGFILE, CONFIG):
|
|||
logging.debug('Configfile successfull read')
|
||||
for line in config.readlines():
|
||||
if not line[0] in ('#', ';', '\n', '\r'):
|
||||
logging.debug('Read entry')
|
||||
key, value = (line.strip().split('='))
|
||||
CONFIG[key.upper().strip()] = value.strip()
|
||||
logging.debug('Set {} to {}'.format(key.upper().strip(), value.strip()))
|
||||
key = strip_argument(key).upper()
|
||||
value = strip_argument(value)
|
||||
CONFIG[key] = value
|
||||
logging.debug('Set {} to {}'.format(key, value))
|
||||
else:
|
||||
logging.error('Failed to read {}'.format(CONFIGFILE))
|
||||
logging.error('Using default values')
|
||||
|
|
@ -38,6 +41,19 @@ def read_config(CONFIGFILE, CONFIG):
|
|||
return True
|
||||
|
||||
|
||||
def strip_argument(argument):
|
||||
'''
|
||||
Becomes a string and strips at first whitespaces, second apostrops and
|
||||
returns the clear string.
|
||||
param 1: string
|
||||
return: string
|
||||
'''
|
||||
argument = argument.strip()
|
||||
argument = argument.strip('"')
|
||||
argument = argument.strip("'")
|
||||
return argument
|
||||
|
||||
|
||||
def print_config(CONFIG):
|
||||
'''
|
||||
Prints the used configuration, if loglevel ist debug.
|
||||
|
|
@ -50,14 +66,21 @@ def print_config(CONFIG):
|
|||
return True
|
||||
|
||||
|
||||
def display_peercert(cert):
|
||||
for i in cert.keys():
|
||||
print(i)
|
||||
for j in cert[i]:
|
||||
print('\t{}'.format(j))
|
||||
return
|
||||
|
||||
|
||||
def receive_buffer_is_valid(raw_data):
|
||||
'''
|
||||
checks, if the received buffer from the connection is valid or not.
|
||||
param 1: byte
|
||||
return: boolean
|
||||
'''
|
||||
data = bytes2int(raw_data)
|
||||
if data == 0 or data == 1:
|
||||
if raw_data == b'\x00' or raw_data == b'\x01':
|
||||
logging.debug('Argument is valid: {}'.format(raw_data))
|
||||
return True
|
||||
else:
|
||||
|
|
@ -65,23 +88,6 @@ def receive_buffer_is_valid(raw_data):
|
|||
return False
|
||||
|
||||
|
||||
def bytes2int(raw_data):
|
||||
'''
|
||||
Convert a given byte value into a integer. If it is possible, it returns
|
||||
the integer, otherwise false.
|
||||
param 1: byte
|
||||
return: integer or false
|
||||
'''
|
||||
bom = byteorder
|
||||
|
||||
try:
|
||||
data = int.from_bytes(raw_data, bom)
|
||||
except Exception as e:
|
||||
logging.error('Unabele to convert raw data to int: {}'.format(raw_data))
|
||||
return False
|
||||
return data
|
||||
|
||||
|
||||
def replace_entry(line, new):
|
||||
'''
|
||||
The function becomes two strings and replaces the second part of the
|
||||
|
|
@ -101,7 +107,6 @@ def replace_entry(line, new):
|
|||
return line
|
||||
|
||||
|
||||
|
||||
def change_status(raw_data, api):
|
||||
'''
|
||||
Becomes the received byte and the path to API file. Grabs the content of
|
||||
|
|
@ -176,8 +181,7 @@ def set_values(raw_data):
|
|||
return: tuple
|
||||
'''
|
||||
timestamp = str(time()).split('.')[0]
|
||||
callback = bytes2int(raw_data)
|
||||
if callback == 1:
|
||||
if raw_data == 'b\x01':
|
||||
status = "true"
|
||||
else:
|
||||
status = "false"
|
||||
|
|
@ -186,23 +190,38 @@ def set_values(raw_data):
|
|||
|
||||
def main():
|
||||
'''
|
||||
The main function - opens a socket und listen for connections.
|
||||
The main function - opens a socket, create a ssl context, load certs and
|
||||
listen for connections.
|
||||
'''
|
||||
CONFIG = {
|
||||
'HOST': 'localhost',
|
||||
'PORT': 10001,
|
||||
'CERT': None,
|
||||
'KEY' : None,
|
||||
'SERVER_CERT': './server.crt',
|
||||
'SERVER_KEY' : './server.key',
|
||||
'CLIENT_CERT': './client.crt',
|
||||
'TIMEOUT': 3.0,
|
||||
'API': './api'
|
||||
'API': './api',
|
||||
'API_TEMPLATE': './api_template',
|
||||
'VERBOSITY': 'info'
|
||||
}
|
||||
CONFIG_FILE = './statusd.conf'
|
||||
FINGERPRINT = \
|
||||
'35:8E:35:FA:58:0A:DD:2B:C8:6A:F9:EA:A3:7B:10:F5:62:89:AB:D0:AB:53:3E:B5:8B:AB:E1:23:CF:93:F5:F9'
|
||||
|
||||
loglevel = logging.DEBUG
|
||||
logging.basicConfig(format='%(levelname)s: %(asctime)s: %(message)s', level=loglevel)
|
||||
logging.basicConfig(format='%(levelname)s: %(message)s', level=loglevel)
|
||||
read_config(CONFIG_FILE, CONFIG)
|
||||
print_config(CONFIG)
|
||||
|
||||
context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
|
||||
context.options &= ~ssl.PROTOCOL_TLS
|
||||
context.verify_mode = ssl.CERT_REQUIRED
|
||||
context.load_cert_chain(certfile = CONFIG['SERVER_CERT'],
|
||||
keyfile = CONFIG['SERVER_KEY'])
|
||||
context.load_verify_locations(cafile = CONFIG['CLIENT_CERT'])
|
||||
context.options &= ~ssl.OP_NO_SSLv3
|
||||
logging.debug('SSL context created')
|
||||
|
||||
with socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) as mySocket:
|
||||
logging.debug('Socket created')
|
||||
try:
|
||||
|
|
@ -215,15 +234,21 @@ def main():
|
|||
exit()
|
||||
while True:
|
||||
try:
|
||||
conn, addr = mySocket.accept()
|
||||
logging.info('Connection from {}:{}'.format(addr[0], addr[1]))
|
||||
fromSocket, fromAddr = mySocket.accept()
|
||||
logging.info('Client connected: {}:{}'.format(fromAddr[0], fromAddr[1]))
|
||||
try:
|
||||
conn.settimeout(float(CONFIG['TIMEOUT']))
|
||||
fromSocket.settimeout(float(CONFIG['TIMEOUT']))
|
||||
logging.debug('Connection timeout set to {}'.format(CONFIG['TIMEOUT']))
|
||||
except Exception as e:
|
||||
logging.error('Canot set timeout to {}'.format(CONFIG['TIMEOUT']))
|
||||
logging.error('Use default value: 3.0')
|
||||
conn.settimeout(3.0)
|
||||
fromSocket.settimeout(3.0)
|
||||
try:
|
||||
conn = context.wrap_socket(fromSocket, server_side = True)
|
||||
# display_peercert(conn.getpeercert())
|
||||
logging.debug('SSL established. Peer: {}'.format(conn.getpeercert()))
|
||||
except Exception as e:
|
||||
logging.error('SSL handshake failed: {}'.format(e))
|
||||
raw_data = conn.recv(1)
|
||||
if receive_buffer_is_valid(raw_data) == True:
|
||||
if change_status(raw_data, CONFIG['API']) == True:
|
||||
|
|
@ -232,12 +257,14 @@ def main():
|
|||
# change_status returns false:
|
||||
else:
|
||||
logging.info('Failed to change status')
|
||||
conn.send(b'\x03')
|
||||
if conn:
|
||||
conn.send(b'\x03')
|
||||
# recive_handle returns false:
|
||||
else:
|
||||
logging.info('Inalid argument recived: {}'.format(raw_data))
|
||||
logging.debug('Send {} back'.format(b'\x03'))
|
||||
conn.send(b'\x03')
|
||||
if conn:
|
||||
conn.send(b'\x03')
|
||||
sleep(0.1) # protection against dos
|
||||
except KeyboardInterrupt:
|
||||
print('\rExit')
|
||||
|
|
@ -245,6 +272,7 @@ def main():
|
|||
exit()
|
||||
except Exception as e:
|
||||
logging.error('{}'.format(e))
|
||||
continue
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
|
|
|
|||
Loading…
Reference in a new issue