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Commit Graph

449 Commits

Author SHA1 Message Date
Andrew Bartlett
13d3c6156f libcli/security: Move dup_nt_token() to libcli/security
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
2023-09-26 23:45:36 +00:00
Andrew Bartlett
e2cc29d132 libcli/security: Pass in claims evaluation state when building any security token
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
b7bd1f438b libcli/security: conditional ace access checks for file server
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
327861dc1f libcli/security: conditional ace access checks for AD
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
b7ae4304b1 libcli/security: cmocka test for running conditional ACEs
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
e2a4f20d40 libcli/security/conditional ACEs: compare composites as sets
... or at least settishly.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
c13684e672 libcli/security/tests: add some test strings
These will soon be used by python/samba/tests/sddl_conditional_ace.py,
and are a format understood by the Windows programs in
libcli/security/tests/windows.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
d7c0948d1a libcli/security: windows-sddl-test: fix read of text examples
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
ee38602170 libcli/security: windows-sddl-test: fix typo in --help
found by Rob van der Linde.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
28d2337774 pytest:security_descriptors: test collected conditional ACEs
These tests were named in the superclass, but were not actually run,
nor was the file in git.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
901f77c543 pytest: security descriptors: test some conditional and RA ACEs
We have two sets of tests: one that will succeed, and one that is going
to remain a knownfail. The latter involves Resource Attribute ACEs that
have the TX type, meaning "byte string".

In MS-DTYP, a bytestring is defined like "#6869210a", with a hash,
followed by an even number of hex digits. In other places on the web, it
is mentioned that zeroes in the string can be replaced by hashes, like so
"#686921#a". We discover via indirect fuzzing that a TX RA ACE can also
take bare integers, like "6869210a" or "2023". As it would be tricky to
support this, and there is no evidence of this occurring in the wild, we
will probably leave this as a knownfail.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
7b9462faf0 pytest: security_descriptors: tests without revision number hack
ACL revision 4 (SECURITY_ACL_REVISION_ADS) is effectively a superset
of revision 2 (SECURITY_ACL_REVISION_NT4), so any revision 2
ACL can be called revision 4 without any problem. But not vice versa:
a revision 4 ACL can contain ACE types that a revision 2 ACL can't. The
extra ACE types relate to objects.

Samba currently simplifies things by calling all its ACLs revision 4,
even if (as is commonly the case) the ACLs contain only revision 2 ACEs.
On the other hand, Windows will use revision 2 whenever it can. In other
tests we skip past this by forcing Windows ACLs to v4 before comparison.
This test is to remind us of the incompatibility.

It would not be hard to fix.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
63be840120 pytest: security_descriptors test for repetitive ACLs
If there are multiple identical ACEs in an SDDL ACL, Windows will decode
them all and put extra trailing zeroes at the end of the ACL.

In contrast, Samba will decode the ACEs and not put extra zeroes at the
end.

The problem comes when Samba tries to read a binary ACL from Windows that
has the extra zeroes, because Samba's ACL size calculation is based on
the size of its constituent ACEs, not the ACL size field.

There is no good reason for an ACL to have repeated ACEs, but they could
be added accidentally.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
e4865a3ba1 libcli/security: test SDDL compilation in cmocka
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
b08093ed9d lbcli/security: callback object ACES fall back with no GUID
As with other object ACEs, if there is not a GUID to refer to the ACE
becomes the corresponding non-object ACE.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
2923898e88 libcli/security/create_descriptor: calc_inherited handles new types
*_CALLBACK_OBJECT types inherit like other _OBJECT types.
*_CALLBACK types do nothing, like other non-OBJECT types.

We also explicitly throw unused alarm callback types and
SEC_ACE_TYPE_SYSTEM_MANDATORY_LABEL and
SEC_ACE_TYPE_SYSTEM_SCOPED_POLICY_ID into the fire.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
1cc8888b54 libcli/security: SDDL: add callback and resource ace type flags
With this, Conditional ACEs and Resource Attribute ACEs in SDDL will
be parsed.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
3959fba37a libcli/security: sddl_encode_ace encodes resource attribute ACEs
Will work when the ace_flags table is updated.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
ed52c9ed36 libcli/security: sddl_encode_ace encodes conditional ACEs
Will work when the ace_flags table is updated.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
6683d611e1 libcli/security: sdd_decode_ace handles resource attribute types
The decoding will not happen until "RA" is added to the ace_types table.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
84fa39722f libcli/security: sdd_decode_ace handles callback types
Conditional ACEs will not actually be decoded until the CALLBACK types
are added to the ace_types flag table.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
e88ea32c21 libcli/security: add conditional ace files to samba-security
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
d6bd491efc libcli:security: add code to interpret conditional ACES
This doesn't actually *do* anything yet, for two reasons:

 1. conditional ACEs are not checked in the
    libcli/security/access_check.c functions (or anywhere else), and
    will be treated just as they are now, as unknown types.

 2. this file isn't mentioned in the wscript, so aren't compiled.

 We'll get to point 2 first.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
4b8e9e3f0c libcli:security: add functions to decode and decode RA ACEs
Resource Attribute ACEs have similar syntactical components to
conditional ACEs -- enough so that it is worth reusing the same
functions, but not quite enough so that it is exactly simple.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
969cb79dae libcli/security: add conditional ACE SDDL functions
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
6f588a1fc5 libcli:security: helpers for converting claim types
There are three different forms for claims, and we need to convert
between them.

For now, we are only going to be converting between conditional ACE
type and the CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 type used by
resource ACEs and in the security token, and later we will add the PAC
claim types.

It doesn't help that these all have incompatible definitions, but we
do our best.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
94f0a1083a libcli:security: outline for sddl_conditional_ace.c
This is to show where we're going to end up.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
140f7466a4 libcli/security: add stub of conditional ACE code.
This is just the outline of what will come, but first we'll add
conditional ACE SDDL decoding in sddl_conditional_ace.c

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
672fc0a1ab libcli/security: find SDDL coda for RA and conditional ACEs
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
cdd9424e4f libcli/security: whitespace repair in sddl.c
tabs not spaces.

It appears that my emacs got its configuration mixed up and was using
spaces.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
e8192dddf3 libcli/sec: reformat long line in wscript_build
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
498c411017 libcli/security: callback object aces are object aces
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
762646b5aa libcli/security: use tabs in sec_ace_object()
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
e81e98c485 libcli/security: helper to find ACEs with meaningful codas
Only Resource Attribute ACEs and Conditional ACEs are expected to have
trailing data. Others sometimes might, but we don't care what it is.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
41e1b6957a libcli/security: helper to find resource attribute ACEs
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Douglas Bagnall
617cfa0e96 libcli/security: helper to find callback/conditional aces
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-26 23:45:35 +00:00
Joseph Sutton
b208c8e848 libcli:security: Prefer explicit initialization to ZERO_STRUCTP()
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-14 21:35:29 +00:00
Douglas Bagnall
895893478e libcli:sec:display: use macro for more ace types
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-07 04:53:41 +00:00
Douglas Bagnall
601d60e391 libcli:sec:display: print callback ace types
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-07 04:53:41 +00:00
Douglas Bagnall
a84e89aa71 libcli/security: create_descriptor handles unknown ACE types
Because we're going to add more ACE types.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-07 04:53:41 +00:00
Douglas Bagnall
2bf404eb5a libcli/security: make sddl_encode_sid an external function
Mirroring the last commit for sddl_decode_sid, we want to be able to
encode SIDs from sibling source files.

The dom_sid functions are insufficient for this because they don't know
the SDDL short aliases, like "WD".

sddl_transition_encode_sid() is used internally.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-07 04:53:41 +00:00
Joseph Sutton
6d012757a0 libcli/security: make sddl_decode_sid an external function
We are going to need it in for parsing SDDL for conditional ACEs and
resource ACEs, which will go in a separate file because it's huge.

This means changing the interface for `sddl_decode_sid` to that from
before 7d466a913f which introduced
sddl_transition_state to deal ease the shift to disambiguated machine/
domain/forest SIDs. Internal callers use `sddl_transition_decode_sid()`
which is the old function; external callers use the same shim pattern as
the other externally available functions.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-09-07 04:53:41 +00:00
Douglas Bagnall
909a2af954 libcli/security: rm unused sec_ace_copy()
Unused since 2014.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
882ad16138 pytest: compare Samba vs Windows SDDL security descriptors
Can Samba understand Windows security descriptors? Does it parse SDDL
the same way?

Here we test on over 7000 SDDL/descriptor pairs and find the answer
is pleasing. In later commits we will add more tests using different
classes of ACE.

The test cases are derived from fuzz seeds, exported to Windows via
the script in the last commit, with the Windows descriptor bytes found
using libcli/security/tests/windows/windows-sddl-test.py.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
741ab485b0 libcli/security: test helper script extracts fuzz SDDL
This allows us to try the fuzz seeds as SDDL on Windows, then test
that Samba matches Windows' security descriptors in the cases where
the SDDL compiles. This will find SDDL edge cases that might otherwise
be missed.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
536b9a0c92 libcli/security: move Windows test script to windows subdir
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
641981c4ad libcli/security: rewrite SDDL tests for running on Windows
This script never worked well because it had to shell out to
Powershell, which never worked well due to syntax conflicts and
Powershell's specialness. The attempted ctypes version did not work,
due to the difficulty in expressing things like "relative
PSECURITY_DESCRIPTOR" in ctypes.

It turns out that pywin32 is easy to install and use, and we can
extract the NDR bytes which is far more useful than just testing if
the SDDL parses.

On Windows:

1. install Python from python.org
2. run `pip install pywin32`
3. copy e.g. libcli/security/tests/data/conditional-aces.txt to Windows
4. run `python windows-sddl-tests.py conditional-aces.txt`
5. add `--help` to see how to export descriptor bytes.

The default output is a whole lot of multi-coloured text, indicating
what failed and what didn't.

With --export-json it writes a JSON file mapping SDDL strings to NDR
byte sequences, which can be used to compare with Samba's attempts. If
you are only interested in --export-json, you might also like --quiet.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
a24ba4ea22 libcli/security: add some test more Windows SDDL test strings
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
3c30079095 libcli/security: script to turn token/descriptor pairs into sddl
We fuzz security descriptors in a couple of different ways, and this
maps seeds from one form into the other. The SDDL examples can also be
used in Windows tests.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
55cc6b52c0 libcli/security: remove unused tmp_ctx in calculate_inherited_from_parent()
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
c1621d3492 libcli/security: avoid leak in calculate_inherited_from_parent()
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
26722348b9 libcli/security: used sec_ace_object() in sddl encoding
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
c73034cf7c librpc/security.idl: adjust size calculations for upcoming ace types
Soon we will get Conditional ACEs and Resource Attribute ACES, each of
which have trailing bytes at the end of the ACE. Here's a diagram:

              ____      The ACE size field may indicate a size bigger
  .type      /    |     than the known parts, even when you take
  .flags    /     |     rounding to a multiple of four into account.
  .size  --'      |     This extra data is meaningful in some ACEs.
  .access_mask    |
  .trustee (sid) _|  <- known data ends here.
                  :
   "coda"      ___:  <- the trailing part, Zero size unless the size
                        field points beyond the end of the known data.
			Probably empty for ordinary ACE types.

Until now we have thrown away these extra bytes, because they have no
meaning in the ACE types we recognise. But with conditional and
resource attribute ACEs we need to catch and process these bytes, so
we add an extra field for that.

Thus we can drop the manually written ndr_pull_security_ace() that
discarded the trailing bytes, because we just allow it to be pulled
into an unused blob. In the very common case, the blob will be empty.

Microsoft does not use a common name across different ACE types to
describe this end-data -- "coda" is a Samba term.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
47edd41bc9 libcli/security: sddl ACL decode avoids early splitting on parenthesis
Soon we will have Conditional ACEs and Resource Attribute ACEs. It is
expected --indeed mandatory-- that the SDDL representations of these
ACEs will contain parentheses, so we can't use '(' and ')' to decide
where ACEs stop and start.

This means shifting where we make a mutable copy of the SDDL string
from per-ACE to per-ACL, and allowing sddl_decode_ace() to decide when
its ACE is finished.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:31 +00:00
Douglas Bagnall
43e017d3b4 libcli/security/pysecurity: use NULL to mean NULL in C
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-24 02:53:30 +00:00
Volker Lendecke
ac738e303e lib: Move few bytes of R/W data to R/O text
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2023-08-14 19:53:37 +00:00
Joseph Sutton
38b93532a7 libcli/security: Remove unnecessary cast
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-08 04:39:37 +00:00
Joseph Sutton
aa0cddad52 libcli/security: Use portable format specifiers
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-08 04:39:37 +00:00
Joseph Sutton
dbf53bf3d5 libcli/security: Fix integer overflow
On a typical machine where the size of ‘int’ is 32 bits or smaller, a
sub-authority of 2147483649 would be ordered before a sub-authority of
1, even though it is greater.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-08 04:39:37 +00:00
Joseph Sutton
5cf61ed2e3 libcli/security: Remove unused function sid_compare_domain()
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-08 04:39:37 +00:00
Joseph Sutton
3870e00fc5 libcli/security: Call dom_sid_compare_domain() instead of sid_compare_domain()
The two functions are identical in behaviour.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-08 04:39:37 +00:00
Joseph Sutton
748cbac2fa libcli/security: Cast isupper() argument to ‘unsigned char’
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-08 04:39:36 +00:00
Joseph Sutton
60f4d873b7 libcli/security: Remove unnecessary code
The revision has already been set at the start of this function.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-08 04:39:36 +00:00
Volker Lendecke
12cbb043d1 libcli: Simplify security_token_is_sid()
Avoid an explicit if-statement.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2023-06-16 16:14:30 +00:00
Volker Lendecke
9e2723988e libcli: Simplify dom_sid_dup()
We have sid_copy() for this.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2023-06-16 16:14:30 +00:00
Volker Lendecke
59694ad0a4 rpc_server3: Pass winbind_env_set() state through to rpcd_*
Winbind can ask rpcd_lsad for LookupNames etc. This can recurse back
into winbind for getpwnam. We have the "_NO_WINBINDD" environment
variable set in winbind itself for this case, but this is lost on the
way into rpcd_lsad. Use a flag in global_sid_Samba_NPA_Flags to pass
this information to dcerpc_core, where it sets the variable on every
call if requested.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=15361
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Tue May 16 11:54:32 UTC 2023 on atb-devel-224
2023-05-16 11:54:32 +00:00
Volker Lendecke
ebbb93cc7a rpc: Add global_sid_Samba_NPA_Flags SID
This will be used as a flexible way to pass per-RPC-connection flags
over ncalrpc to the RPC server without having to modify
named_pipe_auth_req_info6 every time something new needs to be
passed. It's modeled after global_sid_Samba_SMB3.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=15361
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2023-05-16 10:53:40 +00:00
Volker Lendecke
5e8c7192ba libcli: Add security_token_count_flag_sids()
To be used in a few places when checking special-case Samba SIDs.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=15361
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
2023-05-16 10:53:40 +00:00
Douglas Bagnall
848bce061a libcli/security/tests: test strings for windows and samba SDDL tests
These are produced by editing `python/samba/test/sddl.py to enable
`test_write_test_strings`, the running `make test TESTS='sddl\\b'`.

The windows executable from the C file added in a recent commit can
run these tests using the `-i` flag.

The Samba sddl.py tests can be induced to use them too, but that is
only useful for showing they are still in sync.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Noel Power
d36bab52d0 s3/utils: when encoding ace string use "FA", "FR", "FW", "FX" string rights
prior to this patch rights matching "FA", "FR", "FW", "FX" were
outputted as the hex string representing the bit value.

While outputting the hex string is perfectly fine, it makes it harder
to compare icacls output (which always uses the special string values)

Additionally adjust various tests to deal with use of shortcut access masks
as sddl format now uses FA, FR, FW & FX strings (like icalcs does) instead
of hex representation of the bit mask.

adjust
  samba4.blackbox.samba-tool_ntacl
  samba3.blackbox.large_acl
  samba.tests.samba_tool.ntacl
  samba.tests.ntacls
  samba.tests.posixacl

so various string comparisons of the sddl format now pass

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>

[abartlet@samba.org Adapted to new stricter SDDL behaviour around leading zeros in hex
 numbers, eg 0x001]
2023-04-28 02:15:36 +00:00
Noel Power
0a153c1d58 s3/utils: value for ace_flags value "FA" is incorrect
value for FA should be 0x001f01ff  (instead of 0x00001ff)

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
c0d477738e libcli:security:sddl: accept only 8-4-4-4-12 GUIDs
Before we would take strings in a variety of lengths and formats,
which is not what Windows does or [MS-DTYP] says.

This was found by looking at evolved fuzz seeds. Note the 16 and 32
byte sequences in GUID position below:

$ hd $(ls -t seeds/fuzz_sddl_parse/* | head -1)| head
00000000  44 3a 41 52 50 50 50 50  50 28 4f 4c 3b 3b 46 57  |D:ARPPPPP(OL;;FW|
00000010  3b 30 7e ff ff ff ff ff  ff ff 2d 31 38 f5 ff ff  |;0~.......-18...|
00000020  fb 3b 3b 52 43 29 28 4f  44 3b 3b 46 57 3b 3b 3b  |.;;RC)(OD;;FW;;;|
00000030  52 43 29 28 4f 44 3b 3b  46 57 3b 30 30 ff ff ff  |RC)(OD;;FW;00...|
00000040  fb 30 e9 9b 3c cf e6 f5  ff ff fb 3b 3b 52 43 29  |.0..<......;;RC)|
00000050  28 4f 44 3b 3b 46 57 43  52 3b 3b 3b 52 43 29 28  |(OD;;FWCR;;;RC)(|
00000060  4f 44 3b 3b 46 58 47 52  3b 3b 33 43 43 35 38 37  |OD;;FXGR;;3CC587|
00000070  32 35 44 44 44 44 44 44  44 44 44 44 44 44 44 44  |25DDDDDDDDDDDDDD|
00000080  44 44 44 44 44 44 44 44  44 44 3b 52 43 29 28 4f  |DDDDDDDDDD;RC)(O|
00000090  44 3b 3b 46 58 3b 3b 3b  52 43 29 28 4f 44 3b 3b  |D;;FX;;;RC)(OD;;|

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
46793d384e libcli:security:sddl_decode_access allows spaces between flags
because Windows does.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
e7445aa677 libcli:security: sddl_decode_ace: don't allow junk after SID
sddl_decode_sid() will stop at the first non-SID character. Windows
doesn't allow white space here, and nor do we.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
c67f2292cb libcli/security: sddl_decode_access rejects trailing rubbish
Before we just ignored things like negative numbers, because they'd
end up being seen as not-numbers, so treated as flags, then as
not-flags.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
faf1b80a90 libcli:security: sddl_map_flags rejects trailing nonsense
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
d9e1fa3456 libcli/security: SDDL parse tests to run on Windows
The C version tests the public SDDL API on Windows which seems to follow
Active Directory closely, though case in hex numbers is reversed vis-a-vis
defaultSecurityDescriptor.

The python version is less refined and tests powershell functions.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
16d2687cc7 libcli/security: do not pad sddl flags with zeros
We don't see this happening on Windows.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
251da186bf libcli/security: ace type is not enum not flags
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
56da318cee libcli/security: disallow sddl access masks greater than 32 bits
Our previous behaviour (at least with glibc) was to clip off the extra
bits, so that 0x123456789 would become 0x23456789. That's kind of the
obvious thing, but is not what Windows does, which is to saturate the
value, rounding to 0xffffffff. The effect of this is to turn on all
the flags, which quite possibly not what you meant.

Now we just return an error.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
11add4d631 libcli/security: allow decimal/octal numbers in SDDL access mask
This follows Windows and [MS-DTYP].

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
5abd687fce lib/sec/sddl: allow empty non-trailing ACL with flags
The string "S:D:P" is parsed by us and Windows into a valid struct,
which has an empty DACL with the PROTECTED flag, and an empty SACL.
This is reconstructed in canonical order as "D:PS:", which Windows
will correctly parse, but Samba has assumed the "S" is a bad DACL
flag. Now we don't make that assumption.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
b621c59f64 libcli/sec/sddl decode: allow hex numbers in SIDs
These occur canonically when the indentifier authority is > 2^32, but
also are accepted by Windows for any number.

There is a tricky case with an "O:" or "G:" SID that is immediately
followed by a "D:" dacl, because the "D" looks like a hex digit. When
we detect this we need to subtract one from the length.

We also need to do look out for trailing garbage. This was not an
issue before because any string caught by the strspn(...,
"-0123456789") would be either rejected or fully comsumed by
dom_sid_parse_talloc(), but with hex digits, a string like
"S-1-1-2x0xabcxxx-X" would be successfully parsed as "S-1-1-2", and
the "x0xabcxxx-X" would be skipped over. That's why we switch to using
dom_sid_parse_endp(), so we can compare the consumed length to the
expected length.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
22fe657c8a libcli/sec/sddl decode: don't ignore random junk.
previously a string could have anything in it, so long as every second
character was ':'.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
4f5737cbf2 libcli/security/dom_sid: use (unsigned char) in isdigit()
The man page notes:

       The standards require that the argument c for these functions
       is either EOF or a value that is representable in the type
       unsigned char.  If the argument c is of type char, it must be
       cast to unsigned char, as in the following example:

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
1149d39159 libcli/security/dom_sid: hex but not octal is OK for sub-auth
Following Windows, the numbers that would be octal (e.g. "0123") are
converted to decimal by skipping over the zeros.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
67ff4ca200 libcli/security: avoid overflow in subauths
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
b3cff5636b libcli/security: stricter identauth parsing
We don't want octal numbers or overflows.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
6f37f8324c libcli/security: avoid overflow in revision number
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Douglas Bagnall
2398faef23 libcli/security/dom_sid: remove a couple of lost comments
The second one came with code obsoleting the "BIG NOTE" about 10 years
ago, but that code later wandered off somewhere else.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Andreas Schneider
e38f7cf4f1 libcli:security: Fix code spelling
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
2023-04-27 14:25:38 +00:00
Joseph Sutton
6d2d1e7df4 CVE-2023-0614 libcli/security: Make some parameters const
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-05 02:10:34 +00:00
Joseph Sutton
a205568e98 libcli/security: Add dom_sid_has_account_domain() to confirm a S-1-5-21 prefix
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-03-31 08:29:32 +00:00
Stefan Metzmacher
bb09c06d6d libcli/security: rewrite calculate_inherited_from_parent()
This allows us to pass the new tests we just added.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15338

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-03-22 22:10:32 +00:00
Joseph Sutton
1a625702e8 libcli/security: Correctly handle ACL deletion
If there were two consecutive occurrences of an ACL to be deleted, we
would miss the second one.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-03-22 18:40:31 +00:00
Stefan Metzmacher
2c02378029 libcli/security: add security_descriptor_[s|d]acl_insert() helpers
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
2023-03-22 15:01:32 +00:00
Stefan Metzmacher
c3cb915a67 libcli/security: prepare security_descriptor_acl_add() to place the ace at a position
Often it is important to insert an ace at a specific position in the
ACL. As a default we still append by default by using -1, which is the
generic version of passing the number of existing aces.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
2023-03-22 15:01:32 +00:00
Joseph Sutton
be1aae77b7 libcli/security: Reorder SDDL access flags table to match Windows
This means that encoding an ACE in string form will now match Windows.

Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Signed-off-by: Stefan Metzmacher <metze@samba.org>

Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Tue Mar 21 01:19:16 UTC 2023 on atb-devel-224
2023-03-21 01:19:16 +00:00
Stefan Metzmacher
f3fad5a189 libcli/security: prepare sddl machine/forest_sid handling
In future we need to pass in 3 sids to sddl_encode()

Once we pass in a machine_sid from the caller we need to
have a test on a Windows member if the .machine_rid values
really belong to the local machine sid.
At least [MS-DTYP] 2.4.2.4 Well-Known SID Structures
pretents "LA" and "LG" are relative to the local machine sid.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>

Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Mon Mar 20 10:53:41 UTC 2023 on atb-devel-224
2023-03-20 10:53:41 +00:00
Stefan Metzmacher
bd327f7d7a libcli/security: simplify sddl_encode_sid()
We should walk the sid_codes array just once.
This makes further changes easier...

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2023-03-20 09:54:29 +00:00