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Mainly so I can go
make bin/test_lzxpress_plain && bin/test_lzxpress_plain
valgrind bin/test_lzxpress_plain
rr bin/test_lzxpress_plain
rr replay
in a tight loop.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This format is described in [MS-XCA] 2.1 and 2.2, with exegesis in
many posts on the cifs-protocol list[1].
The two public functions are:
ssize_t lzxpress_huffman_decompress(const uint8_t *input,
size_t input_size,
uint8_t *output,
size_t output_size);
uint8_t *lzxpress_huffman_decompress_talloc(TALLOC_CTX *mem_ctx,
const uint8_t *input_bytes,
size_t input_size,
size_t output_size);
In both cases the caller needs to know the *exact* decompressed size,
which is essential for decompression. The _talloc version allocates
the buffer for you, and uses the talloc context to allocate a 128k
working buffer. THe non-talloc function will allocate the working
buffer on the stack.
This compression format gives better compression for messages of
several kilobytes than the "plain" LXZPRESS compression, but is
probably a bit slower to decompress and is certainly worse for very
short messages, having a fixed 256 byte overhead for the first Huffman
table.
Experiments show decompression rates between 20 and 500 MB per second,
depending on the compression ratio and data size, on an i5-1135G7 with
no compiler optimisations.
This compression format is used in AD claims and in SMB, but that
doesn't happen with this commit.
I will not try to describe LZ77 or Huffman encoding here. Don't expect
an answer in MS-XCA either; instead read the code and/or Wikipedia.
[1] Much of that starts here:
https://lists.samba.org/archive/cifs-protocol/2022-October/
but there's more earlier, particularly in June/July 2020, when
Aurélien Aptel was working on an implementation that ended up in
Wireshark.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Pair-programmed-with: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Sometimes (e.g. in lzxpress Huffman encoding, and in some of our
tests: c.f. https://lists.samba.org/archive/samba-technical/2018-March/126010.html)
we want a stable sort algorithm (meaning one that retains the previous
order of items that compare equal).
The GNU libc qsort() is *usually* stable, in that it first tries to
use a mergesort but reverts to quicksort if the necessary allocations
fail. That has led Samba developers to unthinkingly assume qsort() is
stable which is not the case on many platforms, and might not always
be on GNU/Linuxes either.
This adds four functions. stable_sort() sorts an array, and requires
an auxiliary working array of the same size. stable_sort_talloc()
takes a talloc context so it ca create a working array and call
stable_sort(). stable_sort_r() takes an opaque context blob that gets
passed to the compare function, like qsort_r() and ldb_qsort(). And
stable_sort_talloc_r() rounds out the quadrant.
These are LGPL so that the can be used in ldb, which has problems with
unstable sort.
The tests are borrowed and extended from test_ldb_qsort.c.
When sorting non-trivial structs this is roughly as fast as GNU qsort,
but GNU qsort has optimisations for small items, using direct
assignments of rather than memcpy where the size allows the item to be
cast as some kind of int.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15202
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Python's tarfile module is not very careful about paths that step out
of the target directory. We can be a bit better at little cost.
This was reported in 2007[1], and has recently been publicised [2, for
example].
We were informed of this bug in December 2021 by Luis Alberto López
Alvar, but decided then that there were no circumstances under which
this was a security concern. That is, if you can alter the backup
files, you can already do worse things. But there is a case to guard
against an administrator being tricked into trying to restore a file
that isn't based on a real backup.
[1] https://nvd.nist.gov/vuln/detail/CVE-2007-4559
[2] https://www.theregister.com/2022/09/22/python_vulnerability_tarfile/
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15185
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Oct 4 03:48:43 UTC 2022 on sn-devel-184
cmocka unit tests for the authsam_reread_user_logon_data in
source4/auth/sam.c
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The 'log level' line in smb.conf allows messages from different log
classes to be sent to different places, but we have not tested that
this works. Now we do, somewhat.
The test involves running a special binary based on a stripped down
source4/samba/server.c that just starts up, parses the command line
and a given smb.conf, then logs messages from multiple classes and
exits.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Add an initial suite of tests for the smbconf python bindings.
Currently only simple read-only methods are available.
Signed-off-by: John Mulligan <jmulligan@redhat.com>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz
Reviewed-by: David Mulder <dmulder@suse.com>
Reviewed-by: Guenther Deschner <gd@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Thu Apr 21 15:33:38 UTC 2022 on sn-devel-184
Using /tmp directly can lead to errors if multiple autobuilds are
running at the same time. Using tempfile.gettempdir() will look for
$TMPDIR environment variable.
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Using /tmp directly can lead to errors if multiple autobuilds are
running at the same time. Using tempfile.gettempdir() will look for
$TMPDIR environment variable.
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This test also verifies the KRB5CCNAME environment variable is set after
a successful PAM authentication with Kerberos.
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Test that we can add the special Protected Users group, and that we get
an appropriate error message when attempting to add it a second time.
We add these tests here so that we can make use of an old provision that
does not already have the Protected Users group added.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
is_known_pipename() will be removed soon
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Unicode has format control characters that affect the appearance —
including the apparent order — of other characters. Some of these,
like the bidi controls (for mixing left-to-right scripts with
right-to-left scripts) can be used make text that means one thing look
very much like it means another thing.
The potential for duplicity using these characters has recently been
publicised under the name “Trojan Source”, and CVE-2021-42694. A
specific example, as it affects the Rust language is CVE-2021-42574.
We don't have many format control characters in our code — in fact,
just the non-breaking space (\u200b) and the redundant BOM thing
(\ufeff), and this test aims to ensure we keep it that way.
The test uses a series of allow-lists and deny-lists to check most
text files for unknown format control characters. The filtering is
fairly conservative but not exhaustive. For example, XML and text
files are checked, but UTF-16 files are not.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Ralph Boehme <slow@samba.org>
These patches are to address an issue unpacking a very large
winbind.wbint_Principals array (100,000).
We need the NDR_TOKEN_MAX_LIST_SIZE value exposed as
otherwise a well-meaning incrase of this value would
invalidate the test.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14710
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Indexing the config hash table fails for PAM related values:
Traceback (most recent call last):
File "/src/samba/samba/selftest/tests.py", line 49, in <module>
pam_set_items_so_path = config_hash["PAM_SET_ITEMS_SO_PATH"]
KeyError: 'PAM_SET_ITEMS_SO_PATH'
Error creating recipe from python3 /src/samba/samba/selftest/tests.py| at /src/samba/samba/selftest/selftest.pl line 645.
which prevents the test suite from running when built
--without-pam. Access those values using the get() method
instead.
Signed-off-by: Philipp Gesang <philipp.gesang@intra2net.com>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri Apr 16 10:27:41 UTC 2021 on sn-devel-184
I haven't figured out how to properly add a crashing test to
"knownfail", so this is added after the fix.
Signed-off-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Wed Aug 19 17:46:28 UTC 2020 on sn-devel-184
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Mon Jun 22 15:53:30 UTC 2020 on sn-devel-184
This is an implementation which doesn't have undefined behavior
problems. It casts correctly that calculations are don in the correct
integer space. Also the naming is less confusing than what we have in
byteorder.h.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri May 17 20:44:36 UTC 2019 on sn-devel-184
