Commit Graph

27 Commits

Author SHA1 Message Date
Alois Wohlschlager
9a780cf22b Make libsubid more easily usable from C++
C++ requires extern "C" linkage specification to call functions from a C
library. Enclose the function definitions in subid.h in an extern "C"
block if compiling in C++ mode to achieve this.

Signed-off-by: Alois Wohlschlager <alois1@gmx-topmail.de>
2022-01-19 10:05:12 -06:00
Serge Hallyn
e8a2cfa7dc
Merge pull request #451 from hallyn/2021-12-05/license 2022-01-02 18:38:42 -06:00
Adam Sampson
9750fd6819 libsubid: use log_set_progname in subid_init
The static Prog variable here is no longer used, so remove it.
2021-12-27 16:28:23 +00:00
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
Sam James
e0d66b4be1 libsubid: fix defining SONAME version
We were overriding this when --enable-shared was passed. We can actually
just dump the conditional logic as libtool will do the right thing for
us here anyway.

Without this patch, libsubid is installed as .0.

Signed-off-by: Sam James <sam@gentoo.org>
2021-12-20 01:37:42 +00:00
Serge Hallyn
0c9f641408 Show libsubid api version in subid.h
Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-12-05 08:02:57 -06:00
Serge Hallyn
32f641b207 Change the subid export symbols
Rename libsubid symbols to all be prefixed with subid_.

Don't export anything but the subid_*.

Closes #443

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-11-27 14:56:03 -06:00
(GalaxyMaster)
fc832e4648 Fixes the linking issues when libsubid is static and linked to
binaries that also define the Prog and shadow_logfd variables.
2021-10-27 20:14:42 +11:00
Mike Gilbert
6becc82e26 libsubid: fix build with libcrack
Fixes a link failure:

  ../libsubid/.libs/libsubid.so: undefined reference to `FascistCheck'

Bug: https://bugs.gentoo.org/806124
Signed-off-by: Mike Gilbert <floppym@gentoo.org>
2021-08-02 12:00:48 -04:00
Serge Hallyn
fa986b1d73 Respect --enable-static=no in libsubid
libsubid's Makefile.am was always setting enable-shared in its LDFLAGS.
Do that only if not building static.

Closes #387

Signed-off-by: Serge Hallyn <shallyn@cisco.com>
2021-07-25 12:21:55 -05:00
Serge Hallyn
537b8cd90b Fix out of tree builds with respect to libsubid includes
There's a better way to do this, and I hope to clean that up,
but this fixes out of tree builds for me right now.

Closes #386

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-07-23 17:51:13 -05:00
Xi Ruoyao
f4a84efb46
libsubid: link to PAM libraries
libsubid.so links to libmisc.a, which contains several routines referring to
PAM functions.
2021-07-23 14:38:08 +08:00
Serge Hallyn
1d767fb779 libsubid/api.c: make shadow_logfd not extern
Closes #346

Also #include stdio.h

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-06-01 10:11:46 -05:00
Serge Hallyn
b0e86b959f libsubid_init: don't print messages on error
Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-05-23 08:03:14 -05:00
Serge Hallyn
ea7af4e154
Merge pull request #340 from hallyn/2021-05-16/subidrange
Don't return owner in list_owner_ranges API call.
2021-05-22 18:16:43 -05:00
Serge Hallyn
3d670ba7ed nss/libsubid: simplify the ranges variable for list_owner_ranges
Following alexey-tikhonov's suggestion.

Since we've dropped the 'owner' field in the data returned for
get_subid_ranges, we can just return a single allocated array of
simple structs.  This means we can return a ** instead of ***, and
we can get rid of the subid_free_ranges() helper, since the caller
can just free() the returned data.

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-05-22 17:59:57 -05:00
Serge Hallyn
e34f49c196 libsubid_init: return false if out of memory
The rest of the run isn't likely to get much better, is it?

Thanks to Alexey for pointing this out.

Signed-off-by: Serge Hallyn <serge@hallyn.com>
Cc: Alexey Tikhonov <atikhono@redhat.com>
2021-05-17 08:49:01 -05:00
Serge Hallyn
322db32971 Don't return owner in list_owner_ranges API call.
Closes: 339

struct subordinate_range is pretty closely tied to the existing
subid code and /etc/subuid format, so it includes an owner.  Dropping
that or even renaming it is more painful than I'd first thought.
So introduce a 'struct subid_range' which is only the start and
count, leaving 'struct subordinate_range' as the owner, start and
count.

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-05-16 21:49:53 -05:00
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
Serge Hallyn
77e39de1e6 Install subid.h
Now subid.h gets installed under /usr/include/shadow/subid.h

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-05-04 09:21:11 -05:00
Serge Hallyn
0f4347d148 clean up libsubid headers
Move libsubid/api.h into libsubid/subid.h, and document the api in subid.h

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-04-16 21:03:08 -05:00
Serge Hallyn
8492dee663 subids: support nsswitch
Closes #154

When starting any operation to do with subuid delegation, check
nsswitch for a module to use.  If none is specified, then use
the traditional /etc/subuid and /etc/subgid files.

Currently only one module is supported, and there is no fallback
to the files on errors.  Several possibilities could be considered:

1. in case of connection error, fall back to files
2. in case of unknown user, also fall back to files

etc...

When non-files nss module is used, functions to edit the range
are not supported.  It may make sense to support it, but it also
may make sense to require another tool to be used.

libsubordinateio also uses the nss_ helpers.  This is how for instance
lxc could easily be converted to supporting nsswitch.

Add a set of test cases, including a dummy libsubid_zzz module.  This
hardcodes values such that:

'ubuntu' gets 200000 - 300000
'user1' gets 100000 - 165536
'error' emulates an nss module error
'unknown' emulates a user unknown to the nss module
'conn' emulates a connection error ot the nss module

Changes to libsubid:

Change the list_owner_ranges api: return a count instead of making the array
null terminated.

This is a breaking change, so bump the libsubid abi major number.

Rename free_subuid_range and free_subgid_range to ungrant_subuid_range,
because otherwise it's confusing with free_subid_ranges which frees
    memory.

Run libsubid tests in jenkins

Switch argument order in find_subid_owners

Move the db locking into subordinateio.c

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-04-16 21:02:37 -05:00
Serge Hallyn
514c1328b6 try again to fix libmisc sharing problem
Issue #297 reported seeing

*** Warning: Linking the shared library libsubid.la against the
*** static library ../libmisc/libmisc.a is not portable!

which commit b5fb1b38ee was supposed
to fix.  But a few commits later it's back.  So try to fix it
in the way the bug reporter suggested.  This broke builds some
other ways, namely a few missing library specifications, so add
those.

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-04-11 17:42:04 -05:00
Serge Hallyn
b5fb1b38ee libsubid: move libmisc.a to last LIBADD entry
Closes #297

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-01-01 13:01:54 -06:00
Serge Hallyn
607f1dd549 libsubid: fix a prototype in api.h
Signed-off-by: Serge Hallyn <shallyn@cisco.com>
2020-06-19 22:09:20 -05:00
Serge Hallyn
0a7888b1fa Create a new libsubid
Closes #154

Currently this has three functions: one which returns the
list of subuid ranges for a user, one returning the subgids,
and one which frees the ranges lists.

I might be mistaken about what -disable-man means;  some of
the code suggests it means just don't re-generate them, but
not totally ignore them.  But that doesn't seem to really work,
so let's just ignore man/ when -disable-man.

Remove --disable-shared.  I'm not sure why it was there, but it stems
from long, long ago, and I suspect it comes from some ancient
toolchain bug.

Create a tests/run_some, a shorter version of run_all.  I'll
slowly add tests to this as I verify they work, then I can
work on fixing the once which don't.

Also, don't touch man/ if not -enable-man.

Changelog:
	Apr 22: change the subid list api as recomended by Dan Walsh.
	Apr 23: implement get_subid_owner
	Apr 24: implement range add/release
	Apr 25: finish tests and rebase
	May 10: make @owner const

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2020-06-07 12:11:58 -05:00