The NTS-KE helper doesn't need to bind sockets or adjust the clock.
Don't start the privops helper, or keep the capabilities, when dropping
root privileges in its context.
Update the monotonic time before the timestamps are corrected for
unexpected jumps, e.g. due to the computer being suspended and resumed,
and switch to the raw timestamps. This should allow the NTS refresh
interval to better follow real time, but it will not be corrected for
a frequency offset if the clock is not synchronized (e.g. with -x).
Even if a received message will not be returned to the caller (e.g.
because it is truncated), process its control messages to avoid leaking
received descriptors.
Fixes: f231efb811 ("socket: add support for sending and receiving descriptors")
Generate a new uniq ID on each client poll to invalidate responses to
the previous request, even if a new request cannot be generated (e.g.
due to missing cookies). Reset the NAK indicator earlier in the request
sequence. Also, drop the cookie even if it's not included in the request
to prevent the client from getting stuck with a cookie that has an
invalid length. Rely on the exponentially increasing interval to avoid
frequent NTS-KE sessions due to a client bug.
Check the mode instead of the nts pointer to make it clear the pointer
is not expected to be NULL in an NTS instance (unless the NTS support is
stubbed).
GNU readline switched to GPLv3+ in version 6.0, which is incompatible
with the chrony's GPLv2 license.
Drop support for the readline library. Only editline is supported now.
The -U option can be used to start chronyd under a non-root user if it
is provided with all capabilities and access to files, directories, and
devices, needed to operate correctly in the specified configuration. It
is not recommended in cases where the configuration is unknown.
Don't accept NTPv4 packets which have a MAC longer than 24 octets to
strictly follow RFC 7822, which specifies the maximum length of a MAC
and the minimum length of the last extension field to avoid an ambiguity
in parsing of the packet.
This removes an ugly hack that was needed to accept packets that
contained one or more extension fields without a MAC, before RFC 7822
was written and NTP implementations started using truncated MACs.
The long MACs were used by chrony in versions 2.x when configured to
authenticate a server or peer with a key using a 256-bit or longer hash
(e.g. SHA256). For compatibility with chrony >= 4.0, these clients/peers
will need to have "version 3" added to the server/peer line in
chrony.conf.
Show untrusted sources with the '?' symbol instead of '-' to make them
consistent with not selectable and selectable sources in the selectdata
description.
Log an error message when SCK_OpenTcpSocket() fails in the NTS-KE
client, e.g. when connect() fails due to the port not being allowed in
the SELinux policy.
Before sending a cmdmon response, make sure it is not longer than the
request to avoid amplification in case the response/padding length is
incorrectly specified for a request.
