From 3c990f49e2bf9347bd2cc478995baa995ee822fd Mon Sep 17 00:00:00 2001 From: Christian Breunig Date: Fri, 29 Dec 2023 20:54:29 +0100 Subject: login: T5875: restore home directory permissions when re-adding user account After deleting a user account and working with a newly added account, we see that after rebooting in the previously saved configuration, the user is re-added but it's home directory might have an old UID set on the filesystem. This is due to the fact that vyos config does not store UIDs. When adding a user account to the system we now check if the home directory already exists and adjust the ownership to the new UID. --- python/vyos/utils/file.py | 23 ++++++++++++++++++----- src/conf_mode/system-login.py | 6 +++++- 2 files changed, 23 insertions(+), 6 deletions(-) diff --git a/python/vyos/utils/file.py b/python/vyos/utils/file.py index 70ac1753b..c566f0334 100644 --- a/python/vyos/utils/file.py +++ b/python/vyos/utils/file.py @@ -83,21 +83,34 @@ def read_json(fname, defaultonfailure=None): return defaultonfailure raise e -def chown(path, user, group): +def chown(path, user=None, group=None, recursive=False): """ change file/directory owner """ from pwd import getpwnam from grp import getgrnam - if user is None or group is None: + if user is None and group is None: return False # path may also be an open file descriptor if not isinstance(path, int) and not os.path.exists(path): return False - uid = getpwnam(user).pw_uid - gid = getgrnam(group).gr_gid - os.chown(path, uid, gid) + # keep current value if not specified otherwise + uid = -1 + gid = -1 + + if user: + uid = getpwnam(user).pw_uid + if group: + gid = getgrnam(group).gr_gid + + if recursive: + for dirpath, dirnames, filenames in os.walk(path): + os.chown(dirpath, uid, gid) + for filename in filenames: + os.chown(os.path.join(dirpath, filename), uid, gid) + else: + os.chown(path, uid, gid) return True diff --git a/src/conf_mode/system-login.py b/src/conf_mode/system-login.py index aeac82462..f34575aff 100755 --- a/src/conf_mode/system-login.py +++ b/src/conf_mode/system-login.py @@ -29,6 +29,7 @@ from vyos.defaults import directories from vyos.template import render from vyos.template import is_ipv4 from vyos.utils.dict import dict_search +from vyos.utils.file import chown from vyos.utils.process import cmd from vyos.utils.process import call from vyos.utils.process import rc_cmd @@ -334,13 +335,16 @@ def apply(login): command += f' --groups frr,frrvty,vyattacfg,sudo,adm,dip,disk,_kea {user}' try: cmd(command) - # we should not rely on the value stored in # user_config['home_directory'], as a crazy user will choose # username root or any other system user which will fail. # # XXX: Should we deny using root at all? home_dir = getpwnam(user).pw_dir + # T5875: ensure UID is properly set on home directory if user is re-added + if os.path.exists(home_dir): + chown(home_dir, user=user, recursive=True) + render(f'{home_dir}/.ssh/authorized_keys', 'login/authorized_keys.j2', user_config, permission=0o600, formater=lambda _: _.replace(""", '"'), -- cgit v1.2.3