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All the existing calls are right before returns, so they don't really
matter. But you never know when the code will change, and any compiler
will wipe the NULL assignment.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Noel Power <noel.power@suse.com>
We're creating a fresh subcontext for a "[MS-RPCE] 2.2.6 Type
Serialization Version 1". Probably nobody has tested a big endian
subcontext yet.
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Sep 10 23:04:19 UTC 2024 on atb-devel-224
running samba-fuzz CI job on latest tumbleweed docker image results in;
../../librpc/ndr/ndr_orpc.c: In function ‘ndr_print_DUALSTRINGARRAY’:
../../librpc/ndr/ndr_orpc.c:97:49: error: ‘snprintf’ output may be truncated before the last format character [-Werror=format-truncation=]
97 | snprintf(idx, sizeof(idx), "[%d]", i);
| ^
../../librpc/ndr/ndr_orpc.c:97:17: note: ‘snprintf’ output between 4 and 14 bytes into a destination of size 13
97 | snprintf(idx, sizeof(idx), "[%d]", i);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../librpc/ndr/ndr_orpc.c:105:49: error: ‘snprintf’ output may be truncated before the last format character [-Werror=format-truncation=]
105 | snprintf(idx, sizeof(idx), "[%d]", i);
| ^
../../librpc/ndr/ndr_orpc.c:105:17: note: ‘snprintf’ output between 4 and 14 bytes into a destination of size 13
105 | snprintf(idx, sizeof(idx), "[%d]", i);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../librpc/ndr/ndr_orpc.c: In function ‘ndr_print_STRINGARRAY’:
../../librpc/ndr/ndr_orpc.c:159:49: error: ‘snprintf’ output may be truncated before the last format character [-Werror=format-truncation=]
159 | snprintf(idx, sizeof(idx), "[%d]", i);
| ^
../../librpc/ndr/ndr_orpc.c:159:17: note: ‘snprintf’ output between 4 and 14 bytes into a destination of size 13
159 | snprintf(idx, sizeof(idx), "[%d]", i);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Douglas Bagnall <dbagnall@samba.org>
Autobuild-Date(master): Tue Sep 10 01:22:28 UTC 2024 on atb-devel-224
Rename the public function to ndr_token_peek_cmp_fn, the only user
does not remove the token. Factor out ndr_token_find to move the
token-removing logic to ndr_token_retrieve, the only caller that does
remove the token.
Keep libndr at 6.0.0, this has not been released yet.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jennifer Sutton <josutton@catalyst.net.nz>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Aug 29 08:40:52 UTC 2024 on atb-devel-224
Avoid an if-statement inside by passing a pointer-comparing function
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jennifer Sutton <josutton@catalyst.net.nz>
Coverity points out that if the string is longer than INT_MAX, the int
will overflow and the cast to uint8_t will discard bits.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Jennifer Sutton <josutton@catalyst.net.nz>
This is faster than calling snprintf().
Signed-off-by: Jo Sutton <josutton@catalyst.net.nz>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Give debug.c the chance to use just one write call (right now it
doesn't yet)
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
We were skipping the pull in cases where the coda size was calculated
to be zero. This has the right result for empty conditional ACEs, but
not for Resource Attribute ACEs where the
CLAIM_SECURITY_ATTRIBUTE_RELATIVE_V1 coda was not intialised.
The situation is made a bit worse, because the function that
calculates the coda size (ndr_subcontext_size_of_ace_coda()) can
return zero in conditions that are not exactly errors, but in which
the would-be calculated value makes so little sense that zero is
thought to be a safer default.
Credit to OSS-Fuzz.
REF: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=66577
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15613
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): Mon Mar 25 06:00:21 UTC 2024 on atb-devel-224
The whole point of struct GUID_ndr_buf is that this never fails.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This is required that we can use it with ndrdump or in python to decode
a NETLOGON_SAM_LOGON_RESPONSE_EX ldap response.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15588
Signed-off-by: Andreas Schneider <asn@samba.org>
Pair-Programmed-With: Guenther Deschner <gd@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This returns the behaviour with ordinary ACEs to where it was with 4.19.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15574
When an ACE is not an object ACE, which is common, setting the switch
value and attempting the object ACE GUID pull is just going to do
nothing, and we know that ahead of time. By noticing that we can save
a bit of time on a common operation.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15574
From 1e80221b23 (2008) until
c73034cf7c (conditional ACEs, etc, 2023)
we had a manual ndr_pull_security_ace() that would discard trailing
bytes, which are those bytes that we now call the coda. The ACE types
that we handled then are those that end up with a coda.ignored data
blob.
With this we effectively restore the long-standing behaviour in the
event that we push and pull an ACE -- though now we discard the
ignored bytes on push rather than pull.
This change is not because the trailing bytes caused any problems (as
far as is known), but because it is much faster to not do the push.
It may be that such ACEs no longer occur.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15574
This might have little effect, but sometimes we see primatives like
ndr_pull_uint32() taking a few percent of the CPU time, and this is in
all those functions.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15574
We don't expect an ordinary ACE to have a non-empty coda, and we don't
really want to push it if it does, but for this patch we still will.
This will not change the data on the wire.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15574
This will allow some optimisations; in this commit we just copy the
code.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15574
The overwhelmingly common case is that there are no bytes left, and
regardless of the ACE type we want to store an empty blob.
We know the blob will be empty if there are no bytes, so we don't need
to allocate a sub-ndr and tokens list and so forth.
This can save almost half the time of a security descriptor pull.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15574
A u16string is supposed to contain UTF‐16 code units, but
ndr_pull_u16string() and ndr_push_u16string() fail to correctly ensure
this on big‐endian systems. Code that relies on the u16string array
containing correct values will then fail.
Fix ndr_pull_u16string() and ndr_push_u16string() to work on big‐endian
systems, ensuring that other code can use these strings without having
to worry about first encoding them to little‐endian.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If we’re just passing a parameter to another macro which we know
correctly parenthesizes its arguments, then we don’t need to
parenthesize the parameter ourselves.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This type represents a UTF‐16–encoded string. These strings are kept
UTF‐16–encoded rather than converted to the Unix charset to be stored in
memory; this avoids issues regarding NULL termination and conversion
between character sets. We want to be able to handle strings that are
not valid UTF‐16.
Not bumping the NDR ABI version, because there hasn’t been an NDR
release since commit c4f281e9ae.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Commit c51795c747 reorganized
ndr_pull_string() so that when we reach this DEBUG(), we don’t yet have
a string to log — ‘as’ will always be NULL. Attempting to log a NULL
string invokes undefined behaviour.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If the source string doesn’t need to be converted, there’s no reason for
it to be talloc‐allocated.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This ensures that ‘dest’ gets freed on failure.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The new name indicates that — contrary to functions such as strnlen() —
the length may include the terminator.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Using an enumeration rather than ‘uint32_t’ or ‘uint64_t’ means that
debuggers such as gdb can now associate the flag constants with their
respective types. This means that if you have an instance of these flags
types, the debugger will show you the individual flags that make up the
value rather than an inscrutable integer value.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
ndr_pull_string() prohibited this, but ndr_push_string() always masked
STR_NOTERM out. Now the set of allowed flags should be consistent
between the two functions.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
