Commit Graph

56 Commits

Author SHA1 Message Date
Serge Hallyn
e8a2cfa7dc
Merge pull request #451 from hallyn/2021-12-05/license 2022-01-02 18:38:42 -06:00
Serge Hallyn
f93cf255d4 Update licensing info
Closes #238

Update all files to list SPDX license shortname.  Most files are
BSD 3 clause license.

The exceptions are:

serge@sl ~/src/shadow$ git grep SPDX-License | grep -v BSD-3-Clause
contrib/atudel:# SPDX-License-Identifier: BSD-4-Clause
lib/tcbfuncs.c: * SPDX-License-Identifier: 0BSD
libmisc/salt.c: * SPDX-License-Identifier: Unlicense
src/login_nopam.c: * SPDX-License-Identifier: Unlicense
src/nologin.c: * SPDX-License-Identifier: BSD-2-Clause
src/vipw.c: * SPDX-License-Identifier: GPL-2.0-or-later

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-12-23 19:36:50 -06:00
Serge Hallyn
79157cbad8 Make shadow_logfd and Prog not extern
Closes #444
Closes #465

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-12-23 15:18:07 -06:00
Luís Ferreira
7903557988
treewide: remove trailing whitespaces
Signed-off-by: Luís Ferreira <contact@lsferreira.net>
2021-09-13 17:23:17 +01:00
Serge Hallyn
2b22a6909d libsubid: don't print error messages on stderr by default
Closes #325

Add a new subid_init() function which can be used to specify the
stream on which error messages should be printed.  (If you want to
get fancy you can redirect that to memory :)  If subid_init() is
not called, use stderr.  If NULL is passed, then /dev/null will
be used.

This patch also fixes up the 'Prog', which previously had to be
defined by any program linking against libsubid.  Now, by default
in libsubid it will show (subid).  Once subid_init() is called,
it will use the first variable passed to subid_init().

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-05-15 12:38:55 -05:00
Tobias Stoeckmann
875d2d49c1 chfn: Prevent buffer overflow.
This is a stability fix, not a security fix, because the affected -o
option can only be used by root and it takes a modified passwd file.

If a gecos field for a user has BUFSIZ characters without commas and an
equals sign (i.e. a huge slop/extra field) and chfn is called with -o,
then a buffer overflow occurs.

It is not possible to trigger this with shadow tools. Therefore, the
passwd file must be modified manually.

I have fixed this unlikely case the easiest and cleanest way possible.
Since chfn bails out if more than 80 characters excluding commas are
supposed to be written into gecos field, we can stop processing early on
if -o argument is too long.

Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
2020-07-12 19:09:14 +02:00
Christian Göttsche
cbd2472b7c migrate to new SELinux api
Using hard-coded access vector ids is deprecated and can lead to issues with custom SELinux policies.
Switch to `selinux_check_access()`.

Also use the libselinux log callback and log if available to audit.
This makes it easier for users to catch SELinux denials.

Drop legacy shortcut logic for passwd, which avoided a SELinux check if uid 0 changes a password of a user which username equals the current SELinux user identifier.
Nowadays usernames rarely match SELinux user identifiers and the benefit of skipping a SELinux check is negligible.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
2019-10-22 14:56:31 +02:00
Jakub Hrozek
4aaf05d72e Flush sssd caches in addition to nscd caches
Some distributions, notably Fedora, have the following order of nsswitch
modules by default:
    passwd: sss files
    group:  sss files

The advantage of serving local users through SSSD is that the nss_sss
module has a fast mmapped-cache that speeds up NSS lookups compared to
accessing the disk an opening the files on each NSS request.

Traditionally, this has been done with the help of nscd, but using nscd
in parallel with sssd is cumbersome, as both SSSD and nscd use their own
independent caching, so using nscd in setups where sssd is also serving
users from some remote domain (LDAP, AD, ...) can result in a bit of
unpredictability.

More details about why Fedora chose to use sss before files can be found
on e.g.:
    https://fedoraproject.org//wiki/Changes/SSSDCacheForLocalUsers
or:
    https://docs.pagure.org/SSSD.sssd/design_pages/files_provider.html

Now, even though sssd watches the passwd and group files with the help
of inotify, there can still be a small window where someone requests a
user or a group, finds that it doesn't exist, adds the entry and checks
again. Without some support in shadow-utils that would explicitly drop
the sssd caches, the inotify watch can fire a little late, so a
combination of commands like this:
    getent passwd user || useradd user; getent passwd user
can result in the second getent passwd not finding the newly added user
as the racy behaviour might still return the cached negative hit from
the first getent passwd.

This patch more or less copies the already existing support that
shadow-utils had for dropping nscd caches, except using the "sss_cache"
tool that sssd ships.
2018-09-13 14:20:02 +02:00
Dimitri John Ledkov
ee43f47f45
Do not fail on missing files in /etc/, create them instead.
passwd, shadow, group, gshadow etc. can be managed via nss -
e.g. system default accounts can be specified using nss_altfiles,
rather than in /etc/. Thus despite having default accounts, these
files can be missing on disk and thus should be opened with O_CREATE
whenever they are attempted to be opened in O_RDWR modes.
2015-02-27 17:01:29 +00:00
nekral-guest
57f9d5ae9c * src/chage.c, src/chfn.c, src/chgpasswd.c, src/chpasswd.c,
src/chsh.c, src/groupadd.c, src/groupdel.c, src/groupmems.c,
	src/groupmod.c, src/newusers.c, src/useradd.c, src/userdel.c,
	src/usermod.c: Provide the PAM error
	message instead of our own, and log error to syslog.
	* src/groupmems.c: Exit with exit rather than fail_exit in usage().
	* src/newusers.c: Check the number of arguments.
	* src/newusers.c: Do not create the home directory when it is not
	changed.
	* src/useradd.c: Set the group password to "!" rather "x" if there
	are no gshadow file.
2011-11-13 16:24:57 +00:00
nekral-guest
0530588266 * NEWS, src/chfn.c, man/chfn.1.xml: Add --root option. 2011-11-06 18:39:24 +00:00
nekral-guest
b26f73f427 * src/chfn.c, man/chfn.1.xml: Add support for long options.
* src/chfn.c, man/chfn.1.xml: Add -u/--help option
2011-11-06 18:39:19 +00:00
nekral-guest
0419fc4f5f * NEWS, src/chfn.c, src/chsh.c: Fix CVE-2011-0721: forbid \n in
gecos or shell.
2011-02-16 00:18:45 +00:00
nekral-guest
ab9427420e * src/newgrp.c, src/userdel.c, src/grpck.c, src/gpasswd.c,
src/newusers.c, src/pwconv.c, src/chpasswd.c, src/logoutd.c,
	src/chfn.c, src/groupmems.c, src/usermod.c, src/pwunconv.c,
	src/expiry.c, src/groupdel.c, src/chgpasswd.c, src/useradd.c,
	src/su.c, src/groupmod.c, src/passwd.c, src/pwck.c, src/chage.c,
	src/groupadd.c, src/login.c, src/grpconv.c, src/groups.c,
	src/grpunconv.c, src/chsh.c: Prog changed to a constant string.
2010-08-22 19:36:09 +00:00
nekral-guest
4e75bb57bb * src/newgrp.c, src/chfn.c, src/groupmems.c, src/usermod.c,
src/userdel.c, src/chpasswd.c, src/grpck.c, src/gpasswd.c,
	src/groupdel.c, src/chgpasswd.c, src/vipw.c, src/useradd.c,
	src/su.c, src/groupmod.c, src/passwd.c, src/pwck.c,
	src/groupadd.c, src/chage.c, src/login.c, src/faillog.c,
	src/sulogin.c, src/chsh.c, src/pwconv.c: Added splint annotations.
	* src/userdel.c, src/pwconv.c, src/lastlog.c, src/grpck.c,
	src/vipw.c, src/groupmod.c, src/passwd.c, src/pwck.c, src/login.c,
	src/sulogin.c, src/usermod.c: Use return instead of exit at the
	end of main().
	* src/gpasswd.c, src/passwd.c, src/faillog.c: Use the exitcodes.h
	exit codes.
	* src/chpasswd.c: Added missing ||.
	* src/nologin.c: Do not include exitcodes.h.
	* src/nologin.c: Added brackets.
	* src/nologin.c: Avoid assignments in comparisons.
2009-04-30 21:39:38 +00:00
nekral-guest
bab84a13ff Additional PAM cleanup:
* src/userdel.c, src/newusers.c, src/chpasswd.c, src/chfn.c,
	src/groupmems.c, src/usermod.c, src/groupdel.c, src/chgpasswd.c,
	src/useradd.c, src/groupmod.c, src/groupadd.c, src/chage.c,
	src/chsh.c: If the username cannot be determined, report it as
	such (not a PAM authentication failure).
2008-09-06 23:46:44 +00:00
nekral-guest
18fc4505d3 * src/userdel.c, src/newusers.c, src/chpasswd.c, src/chfn.c,
src/groupmems.c, src/usermod.c, src/groupdel.c, src/chgpasswd.c,
	src/useradd.c, src/groupmod.c, src/groupadd.c, src/chage.c,
	src/chsh.c: Simplify the PAM error handling. Do not keep the pamh
	handle, but terminate the PAM transaction as soon as possible if
	there are no PAM session opened.
2008-09-06 13:28:02 +00:00
nekral-guest
ee4e367ea8 * src/newgrp.c, src/userdel.c, src/grpck.c, src/gpasswd.c,
src/newusers.c, src/pwconv.c, src/chpasswd.c, src/logoutd.c,
	src/chfn.c, src/groupmems.c, src/usermod.c, src/pwunconv.c,
	src/expiry.c, src/groupdel.c, src/chgpasswd.c, src/useradd.c,
	src/su.c, src/groupmod.c, src/passwd.c, src/pwck.c,
	src/groupadd.c, src/chage.c, src/login.c, src/grpconv.c,
	src/groups.c, src/grpunconv.c, src/chsh.c: Prog is now global (not
	static to the file) so that it can be used by the helper functions
	of libmisc.
	* lib/prototypes.h: Added extern char *Prog.
	* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Indicate the
	program name with the warning.
2008-09-06 12:51:53 +00:00
nekral-guest
8851893412 * src/chfn.c: Merge some translated messages.
* src/groupmems.c, src/groupadd.c, src/gpasswd.c, src/chsh.c,
	src/chfn.c: Harmonize *_update() failure messages.
	* src/groupmems.c: Harmonize gr_close() failure messages.
	* src/newgrp.c: Harmonize "unknown GID" messages.
	* src/newusers.c: Move the pwd declaration to a inner block scope.
2008-08-30 18:28:24 +00:00
nekral-guest
d7b55ce2bb * src/groupmems.c: Check the return value of gr_update().
* src/chage.c, src/chfn.c, src/chgpasswd.c, src/chpasswd.c,
	src/chsh.c, src/gpasswd.c, src/groupadd.c, src/groupmems.c,
	src/groupmod.c, src/grpck.c, src/grpconv.c, src/grpunconv.c,
	src/passwd.c, src/pwck.c, src/pwconv.c, src/pwunconv.c,
	src/useradd.c, src/userdel.c, src/usermod.c: Harmonize the error
	message sent to stderr in case of *_update () failure.
	* src/chage.c, src/chsh.c, src/groupadd.c, src/passwd.c: Do not
	log to syslog when pw_update() or spw_update() fail.
	* src/newusers.c: Do not log specific error message to stderr when
	sgr_update() fails.
	* src/pwconv.c: Remove duplicated definition of Prog.
2008-08-30 18:27:34 +00:00
nekral-guest
38a50366bc * src/chfn.c, src/chsh.c, src/expiry.c, src/gpasswd.c,
src/newgrp.c, src/passwd.c, src/su.c: Use the same stderr and
	syslog warnings when the username cannot be determined.
	* src/newgrp.c: Reuse the same stderr message for groups which do
	not exist in the system.
2008-08-30 18:27:07 +00:00
nekral-guest
a3be8ff055 * src/chfn.c: Do not exit on pw_unlock failures.
* src/grpconv.c, src/grpunconv.c, src/pwconv.c, src/pwunconv.c,
	src/vipw.c: Open syslog with the right identification name.
	* src/vipw.c: Log unlock errors to syslog.
	* src/vipw.c: Log edits to syslog.
	* src/chage.c, src/chfn.c, src/chsh.c, src/gpasswd.c,
	src/groupadd.c, src/groupdel.c, src/groupmod.c, src/grpconv.c,
	src/grpunconv.c, src/passwd.c, src/pwck.c, src/pwunconv.c,
	src/useradd.c, src/usermod.c: Harmonize the syslog levels. Failure
	to close or unlock are errors. Failure to open files are warnings.
2008-08-22 02:30:33 +00:00
nekral-guest
82779cd336 * src/chfn.c, src/chgpasswd.c, src/chpasswd.c, src/gpasswd.c,
src/groupadd.c, src/groupdel.c, src/groupmems.c, src/groupmod.c,
	src/grpconv.c, src/grpunconv.c, src/newusers.c, src/pwconv.c,
	src/pwunconv.c, src/useradd.c, src/userdel.c: Harmonize the name
	of the variables keeping the lock status, to match the shadow
	library prefixes.
2008-08-22 02:22:34 +00:00
nekral-guest
ccc49e8841 * src/chfn.c: Added fail_exit(). Check if the passwd file is
locked. Report failures to unlock to stderr and syslog.
	* src/chfn.c: Is case of failure, use fail_exit() rather than
	exit().
	* src/chfn.c: Ignore the return value of pam_end().
2008-08-07 08:01:44 +00:00
nekral-guest
7fc596fb8a * lib/groupio.c, lib/groupio.h, lib/pwio.c, lib/pwio.h,
lib/sgroupio.c, lib/sgroupio.h, lib/shadowio.c, lib/shadowio.h:
	Added *_dbname() functions to retrieve the name of the databases.
	* lib/groupio.c, lib/groupio.h, lib/pwio.c, lib/pwio.h,
	lib/sgroupio.c, lib/sgroupio.h, lib/shadowio.c, lib/shadowio.h:
	*_name() functions renamed *setname().
	* src/grpck.c, src/pwck.c: Likewise.
	* lib/groupio.h, lib/pwio.h, lib/sgroupio.h, lib/shadowio.h: Added
	the name of the arguments to the prototypes.
	* src/chage, src/chfn.c, src/chgpasswd.c, src/chpasswd.c,
	src/chsh.c, src/gpasswd.c, src/groupadd.c, src/groupdel.c,
	src/groupmod.c, src/grpck.c, src/grpconv.c, src/grpunconv.c,
	src/newusers.c, src/passwd.c, src/pwck.c, src/pwconv.c,
	src/pwunconv.c, src/useradd.c, src/userdel.c, src/usermod.c:
	Harmonize the erro & syslog messages in case of failure of the
	*_lock(), *_open(), *_close(), *_unlock(), *_remove() functions.
	* src/chgpasswd.c, src/chpasswd.c, src/usermod.c: Avoid
	capitalized messages.
	* src/chpasswd.c, src/useradd.c, src/usermod.c: Harmonize messages
	in case of inexistent entries.
	* src/usermod.c:  Harmonize messages in case of already existing
	entries.
	* src/newusers.c, src/useradd.c: Simplify PAM error handling.
	* src/useradd.c: Report failures to unlock files (stderr, syslog,
	and audit). But do not fail (continue).
	* src/useradd.c (open_files): Do not report to syslog & audit
	failures to lock or open the databases. This might be harmless,
	and the logs were not already informed that a change was
	requested.
	* src/usermod.c: It's not the account which is unlocked, but its
	password.
2008-08-06 15:57:31 +00:00
nekral-guest
538600ef48 * src/chfn.c, src/chsh.c, src/groupdel.c, src/groupmems.c,
src/groupmod.c, src/grpck.c, src/login.c, src/logoutd.c,
	src/newgrp.c, src/newusers.c, src/passwd.c, src/pwck.c,
	src/suauth.c, src/useradd.c, src/userdel.c, src/usermod.c,
	src/vipw.c: Complete the switch from the `' quotation style to ''.
	Do it also in SYSLOG messages. Quote some parameters. All this
	permits to merge some messages.
2008-08-06 15:51:52 +00:00
nekral-guest
3879f07fa8 * src/chfn.c: Use a bool when possible instead of int integers.
* src/chfn.c: Avoid implicit conversion of integers / chars to
	booleans.
	* src/chfn.c: Ignore return value of setlocale(),
	bindtextdomain(), and textdomain().
2008-06-09 20:05:13 +00:00
nekral-guest
c7302b61ef Make sure every source files are distributed with a copyright and license.
Files with no license use the default 3-clauses BSD license. The copyright
were mostly not recorded; they were updated according to the Changelog.
"Julianne Frances Haugh and contributors" changed to "copyright holders
and contributors".
2008-04-27 00:40:09 +00:00
nekral-guest
4196525702 Allow non-US-ASCII characters in the GECOS fields ("name", "room number",
and "other info" fields).
2008-04-27 00:24:49 +00:00
nekral-guest
57f713e426 * libmisc/age.c, libmisc/yesno.c, src/lastlog.c, src/grpck.c,
src/chfn.c, src/passwd.c, src/chage.c, src/login.c, src/sulogin.c,
   src/chsh.c: Fix call to puts (remove end of line, or use fputs).
 * po/*.po: Unfuzzy PO files according to above change.
2008-02-03 16:28:03 +00:00
nekral-guest
de239d9b01 Replace printf by puts for fixed strings. This would avoid issues caused
by formats introduced in translated strings.
2008-01-24 18:39:05 +00:00
nekral-guest
db0dddc6e9 * libmisc/pwdcheck.c: Do not include <pwd.h>. Include <shadow.h>
and "pwauth.h" only when compiled without PAM support.
* src/chfn.c, src/chsh.c: Do not include <shadow.h>
* lib/commonio.c: Do not include <shadow.h>. Do not include
  <pwd.h>. Include "nscd.h" instead of <nscd.h>.
* configure.in: Do not check if shadow.h exist, but make sure it
  exists.
* libmisc/pwdcheck.c, src/chfn.c, src/chsh.c, lib/defines.h,
  lib/shadowmem.c, lib/shadowio.c, lib/commonio.c:
  HAVE_SHADOW_H is no more needed (shadow.h should always exist).
2008-01-05 16:33:43 +00:00
nekral-guest
0cc661a2cf Re-indent. 2007-12-31 15:34:29 +00:00
nekral-guest
4af02cb083 Avoid assignments in comparisons. 2007-12-31 14:37:24 +00:00
nekral-guest
c086f6c931 Avoid implicit conversions to booleans. 2007-12-31 14:15:29 +00:00
nekral-guest
ca468cb988 Document may_change_field(). 2007-12-31 14:03:14 +00:00
nekral-guest
3d04ff4037 Avoid implicit brackets. 2007-12-31 13:48:48 +00:00
nekral-guest
7279ff37f3 * New function: process_flags() split out of main().
The flags variables are now global.
* New functions: check_perms(), update_gecos(),
  get_old_fields(), and check_fields() split out of main().
* Before pam_end(), the return value of the previous
  pam API was already checked. No need to validate it again.
2007-12-31 13:43:04 +00:00
nekral-guest
9adfc136b6 * lib/prototypes.h, configure.in, libmisc/Makefile.am,
libmisc/xgetXXbyYY.c, libmisc/xgetpwnam.c, libmisc/xgetpwuid.c,
  libmisc/xgetgrnam.c, libmisc/xgetgrgid.c, libmisc/xgetspnam.c:
  Added functions xgetpwnam(), xgetpwuid(), xgetgrnam(),
  xgetgrgid(), and xgetspnam(). They allocate memory for the
  returned structure and are more robust to successive calls. They
  are implemented with the libc's getxxyyy_r() functions if
  available.
* libmisc/limits.c, libmisc/entry.c, libmisc/chowntty.c,
  libmisc/addgrps.c, libmisc/myname.c, libmisc/rlogin.c,
  libmisc/pwdcheck.c, src/newgrp.c, src/login_nopam.c,
  src/userdel.c, src/lastlog.c, src/grpck.c, src/gpasswd.c,
  src/newusers.c, src/chpasswd.c, src/chfn.c, src/groupmems.c,
  src/usermod.c, src/expiry.c, src/groupdel.c, src/chgpasswd.c,
  src/su.c, src/useradd.c, src/groupmod.c, src/passwd.c, src/pwck.c,
  src/groupadd.c, src/chage.c, src/login.c, src/suauth.c,
  src/faillog.c, src/groups.c, src/chsh.c, src/id.c: Review all the
  usage of one of the getpwnam(), getpwuid(), getgrnam(),
  getgrgid(), and getspnam() functions. It was noticed on
  http://bugs.debian.org/341230 that chfn and chsh use a passwd
  structure after calling a pam function, which result in using
  information from the passwd structure requested by pam, not the
  original one. It is much easier to use the new xget... functions
  to avoid these issues. I've checked which call to the original
  get... functions could be left (reducing the scope of the
  structure if possible), and I've left comments to ease future
  reviews (e.g. /* local, no need for xgetpwnam */).
  Note: the getpwent/getgrent calls should probably be checked also.
* src/groupdel.c, src/expiry.c: Fix typos in comments.
* src/groupmod.c: Re-indent.
* libmisc/Makefile.am, lib/groupmem.c, lib/groupio.c, lib/pwmem.c,
  lib/pwio.c, lib/shadowmem.c, lib/shadowio.c: Move the __<xx>_dup
  functions (used by the xget... functions) from the <xx>io.c files
  to the new <xx>mem.c files. This avoid linking some utils against
  the SELinux library.
2007-11-18 23:15:26 +00:00
nekral-guest
b2120265fd Added the subversion svn:keywords property (Id) for proper identification. 2007-11-10 23:46:11 +00:00
nekral-guest
0fa9083026 [svn-upgrade] Integrating new upstream version, shadow (4.0.16) 2007-10-07 11:47:33 +00:00
nekral-guest
591830e43b [svn-upgrade] Integrating new upstream version, shadow (4.0.15) 2007-10-07 11:47:22 +00:00
nekral-guest
24178ad677 [svn-upgrade] Integrating new upstream version, shadow (4.0.14) 2007-10-07 11:47:11 +00:00
nekral-guest
8451bed8b0 [svn-upgrade] Integrating new upstream version, shadow (4.0.13) 2007-10-07 11:47:01 +00:00
nekral-guest
e89f3546f2 [svn-upgrade] Integrating new upstream version, shadow (4.0.12) 2007-10-07 11:46:52 +00:00
nekral-guest
b48129fcbb [svn-upgrade] Integrating new upstream version, shadow (4.0.11) 2007-10-07 11:46:34 +00:00
nekral-guest
8c50e06102 [svn-upgrade] Integrating new upstream version, shadow (4.0.10) 2007-10-07 11:46:25 +00:00
nekral-guest
8e167d28af [svn-upgrade] Integrating new upstream version, shadow (4.0.8) 2007-10-07 11:46:07 +00:00
nekral-guest
0ee095abd8 [svn-upgrade] Integrating new upstream version, shadow (4.0.7) 2007-10-07 11:45:58 +00:00
nekral-guest
effd479bff [svn-upgrade] Integrating new upstream version, shadow (4.0.4) 2007-10-07 11:45:23 +00:00