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authorChristian Poessinger <christian@poessinger.com>2020-02-02 18:40:14 +0100
committerChristian Poessinger <christian@poessinger.com>2020-02-05 19:35:13 +0100
commit3a64047c2f1b6279de4b1ada7e87aa5c871f5604 (patch)
treeb964b610dd8dd4133d1f2b1f282f12a12afa1d41 /src/conf_mode/system-login-user.py
parent9c52edb9e2079c315af7385a85f61f21138dd5a6 (diff)
downloadvyos-1x-3a64047c2f1b6279de4b1ada7e87aa5c871f5604.tar.gz
vyos-1x-3a64047c2f1b6279de4b1ada7e87aa5c871f5604.zip
ogin: user: radius: T1948: use discrete configuration for each system
Split combined XML/Python code to individual code for local user accounts and RADIUS authenticated accounts.
Diffstat (limited to 'src/conf_mode/system-login-user.py')
-rwxr-xr-xsrc/conf_mode/system-login-user.py219
1 files changed, 219 insertions, 0 deletions
diff --git a/src/conf_mode/system-login-user.py b/src/conf_mode/system-login-user.py
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+++ b/src/conf_mode/system-login-user.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import sys
+import os
+
+from pwd import getpwall, getpwnam
+from stat import S_IRUSR, S_IWUSR, S_IRWXU, S_IRGRP, S_IXGRP
+from subprocess import Popen, PIPE, STDOUT
+
+from vyos.config import Config
+from vyos.configdict import list_diff
+from vyos import ConfigError
+
+default_config_data = {
+ 'deleted': False,
+ 'add_users': [],
+ 'del_users': []
+}
+
+def get_local_users():
+ """Returns list of dynamically allocated users (see Debian Policy Manual)"""
+ local_users = []
+ for p in getpwall():
+ username = p[0]
+ uid = getpwnam(username).pw_uid
+ if uid in range(1000, 29999):
+ if username not in ['radius_user', 'radius_priv_user']:
+ local_users.append(username)
+
+ return local_users
+
+
+def get_crypt_pw(password):
+ command = '/usr/bin/mkpasswd --method=sha-512 {}'.format(password)
+ p = Popen(command, stdout=PIPE, stderr=STDOUT, shell=True)
+ tmp = p.communicate()[0].strip()
+ return tmp.decode()
+
+
+def get_config():
+ login = default_config_data
+ conf = Config()
+ base_level = ['system', 'login', 'user']
+
+ if not conf.exists(base_level):
+ login['deleted'] = True
+ return login
+
+ # Read in all local users and store to list
+ for username in conf.list_nodes(base_level):
+ user = {
+ 'name': username,
+ 'password_plaintext': '',
+ 'password_encrypted': '!',
+ 'public_keys': [],
+ 'full_name': '',
+ 'home_dir': '/home/' + username,
+ }
+ conf.set_level(base_level + [username])
+
+ # Plaintext password
+ if conf.exists(['authentication', 'plaintext-password']):
+ user['password_plaintext'] = conf.return_value(['authentication', 'plaintext-password'])
+
+ # Encrypted password
+ if conf.exists(['authentication', 'encrypted-password']):
+ user['password_encrypted'] = conf.return_value(['authentication', 'encrypted-password'])
+
+ # User real name
+ if conf.exists(['full-name']):
+ user['full_name'] = conf.return_value(['full-name'])
+
+ # User home-directory
+ if conf.exists(['home-directory']):
+ user['home_dir'] = conf.return_value(['home-directory'])
+
+ # Read in public keys
+ for id in conf.list_nodes(['authentication', 'public-keys']):
+ key = {
+ 'name': id,
+ 'key': '',
+ 'options': '',
+ 'type': ''
+ }
+ conf.set_level(base_level + [username, 'authentication', 'public-keys', id])
+
+ # Public Key portion
+ if conf.exists(['key']):
+ key['key'] = conf.return_value(['key'])
+
+ # Options for individual public key
+ if conf.exists(['options']):
+ key['options'] = conf.return_value(['options'])
+
+ # Type of public key
+ if conf.exists(['type']):
+ key['type'] = conf.return_value(['type'])
+
+ # Append individual public key to list of user keys
+ user['public_keys'].append(key)
+
+ login['add_users'].append(user)
+
+ return login
+
+def verify(login):
+ pass
+
+def generate(login):
+ # users no longer existing in the running configuration need to be deleted
+ local_users = get_local_users()
+ cli_users = [tmp['name'] for tmp in login['add_users']]
+ # create a list of all users, cli and users
+ all_users = list(set(local_users+cli_users))
+
+ # Remove any normal users that dos not exist in the current configuration.
+ # This can happen if user is added but configuration was not saved and
+ # system is rebooted.
+ login['del_users'] = [tmp for tmp in all_users if tmp not in cli_users]
+
+ # calculate users encrypted password
+ for user in login['add_users']:
+ if user['password_plaintext']:
+ user['password_encrypted'] = get_crypt_pw(user['password_plaintext'])
+ user['password_plaintext'] = ''
+
+ # remove old plaintext password
+ # and set new encrypted password
+ os.system("vyos_libexec_dir=/usr/libexec/vyos /opt/vyatta/sbin/my_set system login user '{}' authentication plaintext-password '' >/dev/null".format(user['name']))
+ os.system("vyos_libexec_dir=/usr/libexec/vyos /opt/vyatta/sbin/my_set system login user '{}' authentication encrypted-password '{}' >/dev/null".format(user['name'], user['password_encrypted']))
+
+ return None
+
+def apply(login):
+ for user in login['add_users']:
+ # make new user using vyatta shell and make home directory (-m),
+ # default group of 100 (users)
+ cmd = "useradd -m -N"
+ # check if user already exists:
+ if user['name'] in get_local_users():
+ # update existing account
+ cmd = "usermod"
+
+ # encrypted password must be quited in '' else it won't work!
+ cmd += " -p '{}'".format(user['password_encrypted'])
+ cmd += " -s /bin/vbash"
+ if user['full_name']:
+ cmd += " -c {}".format(user['full_name'])
+
+ if user['home_dir']:
+ cmd += " -d '{}'".format(user['home_dir'])
+
+ cmd += " -G frrvty,vyattacfg,sudo,adm,dip,disk"
+ cmd += " {}".format(user['name'])
+
+ try:
+ os.system(cmd)
+
+ uid = getpwnam(user['name']).pw_uid
+ gid = getpwnam(user['name']).pw_gid
+
+ # install ssh keys
+ key_dir = '{}/.ssh'.format(user['home_dir'])
+ if not os.path.isdir(key_dir):
+ os.mkdir(key_dir)
+ os.chown(key_dir, uid, gid)
+ os.chmod(key_dir, S_IRWXU | S_IRGRP | S_IXGRP)
+
+ key_file = key_dir + '/authorized_keys';
+ with open(key_file, 'w') as f:
+ f.write("# Automatically generated by VyOS\n")
+ f.write("# Do not edit, all changes will be lost\n")
+
+ for id in user['public_keys']:
+ line = ''
+ if id['options']:
+ line = '{} '.format(id['options'])
+
+ line += '{} {} {}\n'.format(id['type'], id['key'], id['name'])
+ f.write(line)
+
+ os.chown(key_file, uid, gid)
+ os.chmod(key_file, S_IRUSR | S_IWUSR)
+
+ except Exception as e:
+ print('Adding user "{}" raised an exception'.format(user))
+
+ for user in login['del_users']:
+ try:
+ # Remove user account but leave home directory to be safe
+ os.system('userdel {}'.format(user))
+ except Exception as e:
+ print('Deleting user "{}" raised an exception'.format(user))
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ sys.exit(1)