237 lines
8.1 KiB
Python
237 lines
8.1 KiB
Python
# Copyright 2015 Canonical, Ltd.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import json
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import logging
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import os
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import sys
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from subiquitycore.controller import BaseController
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from subiquitycore.models import IdentityModel
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from subiquitycore.utils import disable_console_conf, run_command
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from console_conf.ui.views import IdentityView, LoginView
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log = logging.getLogger('console_conf.controllers.identity')
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def get_device_owner():
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""" Check if device is owned """
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# TODO: use proper snap APIs.
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try:
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extrausers_fp = open('/var/lib/extrausers/passwd', 'r')
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except FileNotFoundError:
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return None
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with extrausers_fp:
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passwd_line = extrausers_fp.readline()
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if passwd_line and len(passwd_line) > 0:
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passwd = passwd_line.split(':')
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result = {
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'realname': passwd[4].split(',')[0],
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'username': passwd[0],
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'homedir': passwd[5],
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}
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return result
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return None
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def host_key_fingerprints():
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"""Query sshd to find the host keys and then fingerprint them.
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Returns a sequence of (key-type, fingerprint) pairs.
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"""
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config = run_command(['sshd', '-T'])
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if config['status'] != 0:
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log.debug("sshd -T failed %r", config['err'])
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return []
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keyfiles = []
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for line in config['output'].splitlines():
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if line.startswith('hostkey '):
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keyfiles.append(line.split(None, 1)[1])
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info = []
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for keyfile in keyfiles:
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result = run_command(['ssh-keygen', '-lf', keyfile])
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if result['status'] != 0:
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log.debug("ssh-keygen -lf %s failed %r", keyfile, result['err'])
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continue
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parts = result['output'].strip().split()
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length, fingerprint, host, keytype = parts
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keytype = keytype.strip('()')
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info.append((keytype, fingerprint))
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return info
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host_keys_intro = """
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The host key fingerprints are:
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"""
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host_key_tmpl = """\
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{keytype:{width}} {fingerprint}
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"""
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single_host_key_tmpl = """\
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The {keytype} host key fingerprints is:
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{fingerprint}
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"""
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def host_key_info():
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fingerprints = host_key_fingerprints()
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if len(fingerprints) == 1:
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[(keytype, fingerprint)] = fingerprints
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return single_host_key_tmpl.format(keytype=keytype, fingerprint=fingerprint)
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lines = [host_keys_intro]
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longest_type = max([len(keytype) for keytype, _ in fingerprints])
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for keytype, fingerprint in fingerprints:
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lines.append(host_key_tmpl.format(keytype=keytype, fingerprint=fingerprint, width=longest_type))
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return "".join(lines)
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login_details_tmpl = """\
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Ubuntu Core 16 on {first_ip} ({tty_name})
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{host_key_info}
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To login:
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{sshcommands}
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Personalize your account at https://login.ubuntu.com.
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"""
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login_details_tmpl_no_ip = """\
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Ubuntu Core 16 on <no ip address> ({tty_name})
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You cannot log in until the system has an IP address. (Is there
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supposed to be a DHCP server running on your network?)
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Personalize your account at https://login.ubuntu.com.
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"""
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def write_login_details(fp, username, ips):
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sshcommands = "\n"
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for ip in ips:
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sshcommands += " ssh %s@%s\n"%(username, ip)
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tty_name = os.ttyname(0)[5:] # strip off the /dev/
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if len(ips) == 0:
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fp.write(login_details_tmpl_no_ip.format(
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sshcommands=sshcommands, tty_name=tty_name))
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else:
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first_ip = ips[0]
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fp.write(login_details_tmpl.format(
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sshcommands=sshcommands, host_key_info=host_key_info(), tty_name=tty_name, first_ip=first_ip))
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def write_login_details_standalone():
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owner = get_device_owner()
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if owner is None:
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print("No device owner details found.")
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return 0
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from probert import network
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from subiquitycore.models.network import NETDEV_IGNORED_IFACE_NAMES, NETDEV_IGNORED_IFACE_TYPES
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import operator
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observer = network.UdevObserver()
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observer.start()
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ips = []
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for l in sorted(observer.links.values(), key=operator.attrgetter('name')):
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if l.type in NETDEV_IGNORED_IFACE_TYPES:
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continue
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if l.name in NETDEV_IGNORED_IFACE_NAMES:
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continue
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for _, addr in sorted(l.addresses.items()):
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if addr.scope == "global":
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ips.append(addr.ip)
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if len(ips) == 0:
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tty_name = os.ttyname(0)[5:]
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print("Ubuntu Core 16 on <no ip address> ({})".format(tty_name))
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print()
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print("You cannot log in until the system has an IP address.")
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print("(Is there supposed to be a DHCP server running on your network?)")
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return 2
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write_login_details(sys.stdout, owner['username'], ips)
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return 0
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class IdentityController(BaseController):
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def __init__(self, common):
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super().__init__(common)
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self.model = IdentityModel(self.opts)
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def default(self):
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title = "Profile setup"
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excerpt = "Enter an email address from your account in the store."
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footer = ""
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self.ui.set_header(title, excerpt)
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self.ui.set_footer(footer, 40)
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self.ui.set_body(IdentityView(self.model, self, self.opts, self.loop))
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device_owner = get_device_owner()
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if device_owner is not None:
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self.model.add_user(device_owner)
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key_file = os.path.join(device_owner['homedir'], ".ssh/authorized_keys")
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self.model.user.fingerprints = run_command(['ssh-keygen', '-lf', key_file])['output'].replace('\r', '').splitlines()
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self.login()
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def identity_done(self, email):
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if self.opts.dry_run:
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result = {
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'realname': email,
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'username': email,
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}
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self.model.add_user(result)
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login_details_path = '.subiquity/login-details.txt'
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else:
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self.ui.frame.body.progress.set_text("Contacting store...")
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self.loop.draw_screen()
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result = run_command(["snap", "create-user", "--sudoer", "--json", email])
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self.ui.frame.body.progress.set_text("")
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if result['status'] != 0:
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self.ui.frame.body.error.set_text("Creating user failed:\n" + result['err'])
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return
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else:
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data = json.loads(result['output'])
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result = {
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'realname': email,
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'username': data['username'],
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}
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os.makedirs('/run/console-conf', exist_ok=True)
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login_details_path = '/run/console-conf/login-details.txt'
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self.model.add_user(result)
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ips = []
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net_model = self.controllers['Network'].model
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for dev in net_model.get_all_netdevs():
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ips.extend(dev.actual_global_ip_addresses)
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with open(login_details_path, 'w') as fp:
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write_login_details(fp, result['username'], ips)
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self.login()
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def cancel(self):
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# You can only go back if we haven't created a user yet.
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if self.model.user is None:
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self.signal.emit_signal('prev-screen')
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def login(self):
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title = "Configuration Complete"
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footer = "View configured user and device access methods"
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self.ui.set_header(title)
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self.ui.set_footer(footer)
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net_model = self.controllers['Network'].model
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ifaces = net_model.get_all_netdevs()
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login_view = LoginView(self.opts, self.model, self, ifaces)
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self.ui.set_body(login_view)
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def login_done(self):
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if not self.opts.dry_run:
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# stop the console-conf services (this will kill the current process).
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disable_console_conf()
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self.signal.emit_signal('quit')
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