Let's add a concept of normalization: as preparation for signing json
records let's add a mechanism to bring JSON records into a well-defined
order so that we can safely validate JSON records.
This adds two booleans to each JsonVariant object: "sorted" and
"normalized". The latter indicates whether a variant is fully sorted
(i.e. all keys of objects listed in alphabetical order) recursively down
the tree. The former is a weaker property: it only checks whether the
keys of the object itself are sorted. All variants which are
"normalized" are also "sorted", but not vice versa.
The knowledge of the "sorted" property is then used to optimize
searching for keys in the variant by using bisection.
Both properties are determined at the moment the variants are allocated.
Since our objects are immutable this is safe.
This will call json_variant_sensitive() internally while parsing for
each allocated sub-variant. This is better than calling it a posteriori
at the end, because partially parsed variants will always be properly
erased from memory this way.
An object marked with this flag will be erased from memory when it is
freed. This is useful for dealing with sensitive data (key material,
passphrases) encoded in JSON objects.
usually we want to create new files with mode 0666 (modulated by the
umask). Sometimes we want more restrictive access though, let's add an
explicit flag support for that.
(Note that we don't bother with arbitrary access modes to keep things
simple: just "open as umask permits" and "private to me", nothing else)
This adds xfopenat() which is to fopen() what xopendirat() is to
opendir(), i.e. the "at" counterpart to fopen().
(Similar to the xopendir() case, we prefix this with "x", in case libc
gains this natively eventually.)
We can break if KEYCTL_READ return value is equal to our buffer size.
From keyctl(2):
On a successful return, the return value is always the total size of
the payload data. To determine whether the buffer was of sufficient
size, check to see that the return value is less than or equal to the
value supplied in arg4.
Follow-up for 0d588deae2.
In that commit the output got moved a 2 chars to the right, hence make
sure to also shift the cgroup tree to the right, so that it gets
properly aligned under the cgroup path again.
cryptsetup introduced optional locking scheme that should serialize
unlocking keyslots which use memory hard key derivation
function (argon2). Using the serialization should prevent OOM situation
in early boot while unlocking encrypted volumes.
This partially reverts a07a7324ad.
We have two pieces of information: the value and a boolean.
config_parse_timeout_abort() added in the reverted commit would write
the boolean to the usec_t value, making a mess.
The code is reworked to have just one implementation and two wrappers
which pass two pointers.
The conf-parser machinery already removed whitespace before and after "=", no
need to repeat this step.
The test is adjusted to pass. It was testing an code path that doesn't happen
normally, no point in doing that.
If udevd receives an exit signal, it releases its reference on the udev
monitor in manager_exit(). If at this time a worker is hanging, and if
the event timeout for this worker expires before udevd exits, udevd
crashes in on_sigchld()->udev_monitor_send_device(), because the monitor
has already been freed.
Fix this by testing the validity of manager->monitor in on_sigchld().
EOF is defined to -1, hence on platforms that have "char" unsigned we
can't compare it as-is, except if we accept an implicit cast. let's make
it an explicit cast, acknowledging the issue.
Fixes: #14118
Lennart Poettering
afg
Yu Watanabe
Kevin Kuehler
Michal Sekletár
Zbigniew Jędrzejewski-Szmek
Martin Wilck
Anita Zhang
Mike Kazantsev