111 lines
4.1 KiB
Python
111 lines
4.1 KiB
Python
import datetime
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import ipaddress
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import json
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import re
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import subprocess
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import flask
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import flask_login
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from . import db
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from . import system
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blueprint = flask.Blueprint('vpn', __name__)
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wgkey_regex = re.compile(r'^[A-Za-z0-9/+=]{44}$')
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@blueprint.route('/')
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@flask_login.login_required
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def index():
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return flask.render_template('vpn/index.html')
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@blueprint.route('/list')
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@flask_login.login_required
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def list():
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user = flask_login.current_user.get_id()
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return flask.jsonify(
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{k: v | {'active': flask.request.remote_addr in (v.get('ip'), v.get('ip6'))}
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for k, v in db.load('wireguard').items() if v.get('user') == user})
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@blueprint.route('/new', methods=('POST',))
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@flask_login.login_required
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def new():
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# Each key is associated with a new IPv4 address from the pool settings['wg_net'].
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# Each key gets an IPv6 subnet depending on the amount of surplus addresses available.
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# For wg_net 10.10.0.0/18 and wg_net6 1234:5678:90ab:cdef::/64,
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# the key for 10.10.0.10/32 would get 1234:5678:90ab:cdef:a::/80.
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def ipv4to6(net4, ip4, net6):
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# Calculate the address and prefix length for the assigned IPv6 network.
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len4 = (net4.max_prefixlen - net4.prefixlen)
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len6 = (net6.max_prefixlen - net6.prefixlen)
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# Make sure the network address ends at a colon. Wastes some addresses but IPv6.
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assigned = (len6 - len4) - (len6 - len4) % 16
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ip6 = (net6.network_address + (index<<assigned)).compressed
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return ip6 + '/' + str(net6.max_prefixlen - assigned)
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pubkey = flask.request.json.get('pubkey', '')
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if not re.match(wgkey_regex, pubkey):
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return flask.Response('invalid key', status=400, mimetype='text/plain')
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settings = db.load('settings')
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server_pubkey = subprocess.run([f'wg pubkey'], input=settings.get('wg_key'),
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text=True, capture_output=True, shell=True).stdout.strip()
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host = ipaddress.ip_interface(settings.get('wg_net', '10.0.0.1/24'))
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ip6 = None
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with db.locked():
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# Find a free address for the new key.
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keys = db.read('wireguard')
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for index, ip in enumerate(host.network.hosts(), start=1):
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if ip != host.ip and str(ip) not in keys:
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if wg_net6 := settings.get('wg_net6'):
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ip6 = ipv4to6(host.network, ip, ipaddress.ip_interface(wg_net6).network)
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break
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else:
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return flask.Response('no more available IP addresses', status=500, mimetype='text/plain')
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now = datetime.datetime.utcnow()
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name = re.sub('[^-._A-Za-z0-9]', '', flask.request.json.get('name', ''))
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keys[str(ip)] = {
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'key': pubkey,
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'ip6': str(ip6) if ip6 else None,
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'time': now.timestamp(),
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'user': flask_login.current_user.get_id(),
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'name': name,
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}
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db.write('wireguard', keys)
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# Generate a new config archive for firewall nodes.
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system.run(system.save_config)
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# Template arguments.
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args = {
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'server': settings.get('wg_endpoint'),
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'port': settings.get('wg_port', '51820'),
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'server_key': server_pubkey,
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'pubkey': pubkey,
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'ip': str(ip),
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'ip6': str(ip6) if ip6 else None,
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'timestamp': now,
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'name': name,
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'dns': settings.get('wg_dns') if flask.request.json.get('use_dns', True) else False,
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'allowed_nets': settings.get('wg_allowed_nets', []),
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'add_default': flask.request.json.get('add_default', False),
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}
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return flask.render_template('vpn/wg-fri.conf', **args)
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@blueprint.route('/del', methods=('POST',))
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@flask_login.login_required
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def delete():
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pubkey = flask.request.json.get('pubkey', '')
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if not wgkey_regex.match(pubkey):
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return flask.Response('invalid key', status=400, mimetype='text/plain')
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with db.locked():
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user = flask_login.current_user.get_id()
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keys = {k: v for k, v in db.read('wireguard').items() if v.get('user') != user or v.get('key') != pubkey}
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db.write('wireguard', keys)
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system.run(system.save_config)
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return flask.Response(f'deleted key {pubkey}', status=200, mimetype='text/plain')
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