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#!/usr/bin/python3 | |
''' | |
The script looks for a line similar to: | |
PublicKey=eP5bTA845m1hTnp0bjgFnw4efn+NHQ7WrXVwVmffwhY= | |
Then it goes back one line and uses that if it is a comment | |
# Example comment | |
Example file content | |
``` | |
[Peer] | |
# Example | |
PublicKey = eP5bTA845m1hTnp0bjgFnw4efn+NHQ7WrXVwVmffwhY= | |
AllowedIPs = 192.0.2.3/32, 2001:db8::3cf5/128 | |
``` | |
''' | |
import argparse | |
import os | |
import re | |
import subprocess | |
parser = argparse.ArgumentParser() | |
parser.add_argument('-c', '--cfg', default='/etc/systemd/network/wg0.netdev') | |
args = parser.parse_args() | |
pubkeyRegex = re.compile(r'^PublicKey ?= ?(.*)$', re.IGNORECASE) | |
peerRegex = re.compile(r'^peer: (.*)$') | |
keyLabels = {} | |
# Stores the previous line from the current iteration | |
prevLine = '' | |
with open(args.cfg) as f: | |
for line in f: | |
line = line.strip() | |
pubkeyMatch = re.search(pubkeyRegex, line) | |
if pubkeyMatch != None: | |
pubkey = pubkeyMatch.group(1) | |
# The regex can match empty string so we prevent that here | |
if len(pubkey) != 44: | |
continue | |
# If the previous line was a comment, then use it | |
if len(prevLine) > 3 and prevLine[0] == '#': | |
keyLabels[pubkey] = prevLine[2:] | |
else: | |
keyLabels[pubkey] = 'Unknown' | |
prevLine = line | |
# We have parsed the config file, now we will run wg and modify its output | |
wg = subprocess.run(['wg'], encoding='utf-8', stdout=subprocess.PIPE) | |
for line in wg.stdout.split('\n'): | |
peerMatch = re.search(peerRegex, line) | |
if peerMatch != None: | |
pubkey = peerMatch.group(1) | |
if pubkey in keyLabels.keys(): | |
print('{} is {}'.format(line.strip(), keyLabels[pubkey])) | |
continue | |
print(line) |
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