Port most of nm-openvpn-auth-dialog to Python
Max Moser
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fb4cfa2413
commit
c9c72159b7
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#!/usr/bin/env python3
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"""A tool for finding the passwords required by the plugin"""
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import gi
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gi.require_version('Gtk', '3.0')
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from gi.repository import Gtk
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import argparse
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import sys
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supported_services = ["org.freedesktop.NetworkManager.wireguard"]
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# for parsing the data-keys
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DATA_KEY_TAG = "DATA_KEY="
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DATA_VAL_TAG = "DATA_VAL="
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SECRET_KEY_TAG = "SECRET_KEY="
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SECRET_VAL_TAG = "SECRET_VAL="
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# strings used in hints
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VPN_MESSAGE = "x-vpn-message:"
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VPN_PASS = "password"
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VPN_CERTPASS = "cert-pass"
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VPN_PROXY_PASS = "http-proxy-password"
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# NMSettingSecretFlags
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NM_SETTING_SECRET_FLAG_NONE = 0
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NM_SETTING_SECRET_FLAG_AGENT_OWNED = 1
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NM_SETTING_SECRET_FLAG_NOT_SAVED = 2
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NM_SETTING_SECRET_FLAG_NOT_REQUIRED = 4
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class PasswordDialog(Gtk.Dialog):
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"""The dialog used for communication with the User (for password entry)"""
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def __init__(self, parent, prompt, password, need_pw, certpass, need_cp, proxy_pass, need_pp):
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Gtk.Dialog.__init__(self, "Authenticate VPN", parent, 0,
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(Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL,
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Gtk.STOCK_OK, Gtk.ResponseType.OK))
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self.password = password if password is not None else ""
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self.certpass = certpass if certpass is not None else ""
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self.proxypass = proxy_pass if proxy_pass is not None else ""
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self.set_default_size(150, 100)
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label = Gtk.Label(prompt)
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area = Gtk.Box()
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area.set_spacing(10)
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box = self.get_content_area()
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box.set_spacing(10)
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box.add(label)
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# create the labels / text-fields for the passwords
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pw_box = Gtk.Box()
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self.pw = Gtk.Label("Password")
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self.pw_field = Gtk.Entry()
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self.pw_field.set_text(self.password)
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pw_box.set_homogeneous(True)
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pw_box.add(self.pw)
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pw_box.add(self.pw_field)
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cp_box = Gtk.Box()
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self.cp = Gtk.Label("Certificate Password")
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self.cp_field = Gtk.Entry()
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self.cp_field.set_text(self.certpass)
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cp_box.set_homogeneous(True)
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cp_box.add(self.cp)
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cp_box.add(self.cp_field)
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pp_box = Gtk.Box()
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self.pp = Gtk.Label("Proxy Password")
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self.pp_field = Gtk.Entry()
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self.pp_field.set_text(self.proxypass)
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pp_box.set_homogeneous(True)
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pp_box.add(self.pp)
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pp_box.add(self.pp_field)
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if need_pw:
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box.add(pw_box)
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if need_cp:
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box.add(cp_box)
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if need_pp:
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box.add(pp_box)
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area.add(box)
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self.show_all()
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def get_password(self):
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"""Return the password entered by the user (only valid after .run())"""
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return self.pw_field.get_text()
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def get_certpass(self):
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"""Return the cert-pass entered by the user (only valid after .run())"""
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return self.cp_field.get_text()
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def get_proxypass(self):
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"""Return the http-proxy-password entered by the user (only valid after .run())"""
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return self.pp_field.get_text()
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def read_details(input_file):
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"""Read the DATA and SECRET things passed to the stdin and create dictionaries from them"""
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data = {}
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secrets = {}
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data_key = None
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secret_key = None
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for line in input_file:
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line = line.strip()
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if line == "DONE":
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break
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else:
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if line.startswith(DATA_KEY_TAG):
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data_key = line[len(DATA_KEY_TAG):]
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elif line.startswith(DATA_VAL_TAG):
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data_val = line[len(DATA_VAL_TAG):]
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data[data_key] = data_val
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elif line.startswith(SECRET_KEY_TAG):
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secret_key = line[len(SECRET_KEY_TAG):]
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elif line.startswith(SECRET_VAL_TAG):
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secret_val = line[len(SECRET_VAL_TAG):]
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secrets[secret_key] = secret_val
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return data, secrets
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def check_passwords_required(hints, name):
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"""Check which passwords we need for the plugin"""
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prompt = "You need to authenticate to access the VPN '%s'" % name
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need_password, need_certpass, need_proxy_pass = False, False, False
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for hint in hints:
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if hint.startswith(VPN_MESSAGE):
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prompt = hint[len(VPN_MESSAGE):]
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elif hint == VPN_PASS:
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need_password = True
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elif hint == VPN_CERTPASS:
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need_certpass = True
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elif hint == VPN_PROXY_PASS:
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need_proxy_pass = True
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# TODO implement other logic from `get_passwords_required()` as well
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return prompt, need_password, need_certpass, need_proxy_pass
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def keyring_lookup(uuid, key):
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"""Look up the information stored in the keyring for uuid and key"""
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# TODO
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return "asdf"
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def nm_vpn_service_plugin_get_secret_flags(data_dict, secret_name, out_flags):
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"""Check if the """
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lookup_item = "%s-flags" % secret_name
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if lookup_item not in data_dict:
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# if the constructed lookup item is not in the dictionary...
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return False, out_flags
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else:
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try:
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entry = data_dict[lookup_item]
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flag = int(entry)
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# check if the flag is one of the NMSecretSettingFlags
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if flag not in [0,1,2,4] or str(flag) != entry:
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return False, out_flags
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return True, flag
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except:
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return False, out_flags
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def find_existing_passwords(data_dict, secrets_dict, vpn_uuid, need_pass, need_certpass, need_proxypass):
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"""Check if any of the required passwords can be found in the secrets_dict or the keyring"""
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pw_flags = NM_SETTING_SECRET_FLAG_NONE
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cp_flags = NM_SETTING_SECRET_FLAG_NONE
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pp_flags = NM_SETTING_SECRET_FLAG_NONE
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stored_pw = None
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stored_cp = None
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stored_pp = None
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# password
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# check if the DATA dictionary contains any flags regarding the password
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# and if so, check if it is anything else than NM_SETTING_SECRET_FLAG_NOT_SAVED
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tmp, pw_flags = nm_vpn_service_plugin_get_secret_flags(data_dict, VPN_PASS, pw_flags)
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if pw_flags != NM_SETTING_SECRET_FLAG_NOT_SAVED:
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# check out the SECRETS dictionary
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# or, if that fails
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# check out the keyring (TODO)
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if VPN_PASS in secrets_dict:
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stored_pw = secrets_dict[VPN_PASS]
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else:
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pass
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# stored_pw = keyring_lookup(vpn_uuid, VPN_PASS)
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# certpass
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tmp, cp_flags = nm_vpn_service_plugin_get_secret_flags(data_dict, VPN_CERTPASS, cp_flags)
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if cp_flags != NM_SETTING_SECRET_FLAG_NOT_SAVED:
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if VPN_CERTPASS in secrets_dict:
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stored_cp = secrets_dict[VPN_CERTPASS]
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else:
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pass
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# stored_cp = keyring_lookup(vpn_uuid, VPN_CERTPASS)
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# proxy
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tmp, pp_flags = nm_vpn_service_plugin_get_secret_flags(data_dict, VPN_PROXY_PASS, pp_flags)
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if pp_flags != NM_SETTING_SECRET_FLAG_NOT_SAVED:
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if VPN_PROXY_PASS in secrets_dict:
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stored_pp = secrets_dict[VPN_PROXY_PASS]
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else:
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pass
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# stored_pp = keyring_lookup(vpn_uuid, VPN_PROXY_PASS)
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return stored_pw, stored_cp, stored_pp
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def wait_for_quit():
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"""Wait until we read QUIT from stdin"""
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for line in sys.stdin:
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line = line.strip()
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if line == "QUIT":
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break
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descr = ""
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epilog = ""
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parser = argparse.ArgumentParser(description=descr, epilog=epilog)
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parser.add_argument("-r", "--reprompt", type=str, help="Reprompt for password")
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parser.add_argument("-u", "--uuid", type=str, help="UUID of VPN connection")
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parser.add_argument("-n", "--name", type=str, help="Name of VPN connection")
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parser.add_argument("-s", "--service", type=str, help="VPN service type")
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parser.add_argument("-i", "--allow-interaction", action="store_true", default=False, help="Allow user interaction")
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parser.add_argument("--external-ui-mode", action="store_true", default=False, help="External UI mode")
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parser.add_argument("-t", "--hint", action="append", help="Hints from the VPN plugin")
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args = parser.parse_args()
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canceled = False
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hints = args.hint
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ext_ui = args.external_ui_mode
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retry = args.reprompt
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interactive = args.allow_interaction
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uuid = args.uuid
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name = args.name
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service = args.service
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if hints is None:
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hints = []
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if uuid is None or name is None or service is None:
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print("UUID (-u), Name (-n) and Service (-s) have to be provided", file=sys.stderr)
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exit(1)
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if service not in supported_services:
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print("The service '%s' is not supported" % service, file=sys.stderr)
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print("Supported services: %s" % supported_services, file=sys.stderr)
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exit(1)
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if ext_ui:
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print("Sorry, but external UI is not supported", file=sys.stderr)
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# read data and secrets from stdin until "DONE", in the format
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#
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# DATA_KEY=key
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# DATA_VAL=value
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# SECRET_KEY=key
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# SECRET_VAL=value
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# DONE
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data, secrets = read_details(sys.stdin)
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if not data and not secrets:
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# sys.exit(1)
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pass
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print(data)
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print(secrets)
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# check, which passwords are required
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prompt, need_password, need_certpass, need_proxy_pass = check_passwords_required(hints, name)
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if need_password or need_certpass or need_proxy_pass:
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# find whatever we need in the secrets map or the keyring (TODO)
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pw, cp, pp = find_existing_passwords(data, secrets, uuid, need_password, need_certpass, need_proxy_pass)
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required_secrets = False
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# check if there is anything left we need
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if need_password and pw is None:
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required_secrets = True
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if need_certpass and cp is None:
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required_secrets = True
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if need_proxy_pass and pp is None:
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required_secrets = True
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# if there is, we have to ask the user
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if interactive and (required_secrets or retry):
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dialog = PasswordDialog(None, prompt,
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pw, need_password,
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cp, need_certpass,
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pp, need_proxy_pass)
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resp = dialog.run()
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if resp == Gtk.ResponseType.OK:
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# fetch what we need from the dialog
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if need_password:
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pw = dialog.get_password()
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if need_certpass:
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cp = dialog.get_certpass()
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if need_proxy_pass:
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pp = dialog.get_proxypass()
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else:
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canceled = True
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# if the dialog wasn't cancelled or the session wasn't interactive at all,
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# print to stdout what we found out
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if not canceled:
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# print whatever we found out
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if pw is not None:
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print("%s\n%s" % (VPN_PASS, pw))
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if cp is not None:
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print("%s\n%s" % (VPN_CERTPASS, cp))
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if pp is not None:
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print("%s\n%s" % (VPN_PROXY_PASS, pp))
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print("\n\n", end="")
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# wait for QUIT from the stdin
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wait_for_quit()
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exit(1 if canceled else 0)
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