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refactor activation of rekeying
This makes automatic rekeying internal to the packet code (previously
the server and client loops needed to assist). In doing to it makes
application of rekey limits more accurate by accounting for packets
about to be sent as well as packets queued during rekeying events
themselves.
Based on a patch from dtucker@ which was in turn based on a patch
Aleksander Adamowski in bz#2521; ok markus@
Upstream-ID: a441227fd64f9739850ca97b4cf794202860fcd8
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Avoid ugly "DISPLAY "(null)" invalid; disabling X11
forwarding" message when DISPLAY is not set. This could also result in a
crash on systems with a printf that doesn't handle NULL. OK djm@
Upstream-ID: 20ee0cfbda678a247264c20ed75362042b90b412
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Remove leftover roaming dead code. ok djm markus.
Upstream-ID: 13d1f9c8b65a5109756bcfd3b74df949d53615be
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Zero a stack buffer with explicit_bzero() instead of
memset() when returning from client_loop() for consistency with
buffer_free()/sshbuf_free().
ok dtucker@ deraadt@ djm@
Upstream-ID: bc9975b2095339811c3b954694d7d15ea5c58f66
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remove roaming support; ok djm@
Upstream-ID: 2cab8f4b197bc95776fb1c8dc2859dad0c64dc56
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eliminate fallback from untrusted X11 forwarding to trusted
forwarding when the X server disables the SECURITY extension; Reported by
Thomas Hoger; ok deraadt@
Upstream-ID: f76195bd2064615a63ef9674a0e4096b0713f938
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adjust pledge promises for ControlMaster: when using
"ask" or "autoask", the process will use ssh-askpass for asking confirmation.
problem found by halex@
ok halex@
Upstream-ID: 38a58b30ae3eef85051c74d3c247216ec0735f80
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pledges ssh client: - mux client: which is used when
ControlMaster is in use. will end with "stdio proc tty" (proc is to
permit sending SIGWINCH to mux master on window resize)
- client loop: several levels of pledging depending of your used options
ok deraadt@
Upstream-ID: 21676155a700e51f2ce911e33538e92a2cd1d94b
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Replace a function-local allocation with stack memory.
ok djm@
Upstream-ID: c09fbbab637053a2ab9f33ca142b4e20a4c5a17e
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Turn off DSA by default; add HostKeyAlgorithms to the
server and PubkeyAcceptedKeyTypes to the client side, so it still can be
tested or turned back on; feedback and ok djm@
Upstream-ID: 8450a9e6d83f80c9bfed864ff061dfc9323cec21
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better refuse ForwardX11Trusted=no connections attempted
after ForwardX11Timeout expires; reported by Jann Horn
Upstream-ID: bf0fddadc1b46a0334e26c080038313b4b6dea21
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Remove pattern length argument from match_pattern_list(), we
only ever use it for strlen(pattern).
Prompted by hanno AT hboeck.de pointing an out-of-bound read
error caused by an incorrect pattern length found using AFL
and his own tools.
ok markus@
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fix small memory leak when UpdateHostkeys=no
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fix setting/clearing of TTY raw mode around
UpdateHostKeys=ask confirmation question; reported by Herb Goldman
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UpdateHostKeys fixes:
I accidentally changed the format of the hostkeys@openssh.com messages
last week without changing the extension name, and this has been causing
connection failures for people who are running -current. First reported
by sthen@
s/hostkeys@openssh.com/hostkeys-00@openssh.com/
Change the name of the proof message too, and reorder it a little.
Also, UpdateHostKeys=ask is incompatible with ControlPersist (no TTY
available to read the response) so disable UpdateHostKeys if it is in
ask mode and ControlPersist is active (and document this)
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Revise hostkeys@openssh.com hostkey learning extension.
The client will not ask the server to prove ownership of the private
halves of any hitherto-unseen hostkeys it offers to the client.
Allow UpdateHostKeys option to take an 'ask' argument to let the
user manually review keys offered.
ok markus@
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Refactor hostkeys_foreach() and dependent code Deal with
IP addresses (i.e. CheckHostIP) Don't clobber known_hosts when nothing
changed ok markus@ as part of larger commit
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Host key rotation support.
Add a hostkeys@openssh.com protocol extension (global request) for
a server to inform a client of all its available host key after
authentication has completed. The client may record the keys in
known_hosts, allowing it to upgrade to better host key algorithms
and a server to gracefully rotate its keys.
The client side of this is controlled by a UpdateHostkeys config
option (default on).
ok markus@
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Reduce use of <sys/param.h> and transition to <limits.h>
throughout. ok djm markus
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adapt kex to sshbuf and struct ssh; ok djm@
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move dispatch to struct ssh; ok djm@
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update packet.c & isolate, introduce struct ssh a) switch
packet.c to buffer api and isolate per-connection info into struct ssh b)
(de)serialization of the state is moved from monitor to packet.c c) the old
packet.c API is implemented in opacket.[ch] d) compress.c/h is removed and
integrated into packet.c with and ok djm@
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move authfd.c and its tentacles to the new buffer/key
API; ok markus@
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[PROTOCOL auth-options.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c]
[auth-rsa.c auth.c auth1.c auth2-hostbased.c auth2-kbdint.c auth2-none.c]
[auth2-passwd.c auth2-pubkey.c auth2.c canohost.c channels.c channels.h]
[clientloop.c misc.c misc.h monitor.c mux.c packet.c readconf.c]
[readconf.h servconf.c servconf.h serverloop.c session.c ssh-agent.c]
[ssh.c ssh_config.5 sshconnect.c sshconnect1.c sshconnect2.c sshd.c]
[sshd_config.5 sshlogin.c]
Add support for Unix domain socket forwarding. A remote TCP port
may be forwarded to a local Unix domain socket and vice versa or
both ends may be a Unix domain socket. This is a reimplementation
of the streamlocal patches by William Ahern from:
http://www.25thandclement.com/~william/projects/streamlocal.html
OK djm@ markus@
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[channels.c channels.h clientloop.c ssh.c]
fix remote fwding with same listen port but different listen address
with gerhard@, ok djm@
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[clientloop.c serverloop.c]
bz#1818 - don't send channel success/failre replies on channels that
have sent a close already; analysis and patch from Simon Tatham;
ok markus@
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[auth1.c auth2-chall.c auth2-passwd.c authfile.c bufaux.c bufbn.c]
[buffer.c cipher-3des1.c cipher.c clientloop.c gss-serv.c kex.c]
[kexdhc.c kexdhs.c kexecdhc.c kexgexc.c kexecdhs.c kexgexs.c key.c]
[monitor.c monitor_wrap.c packet.c readpass.c rsa.c serverloop.c]
[ssh-add.c ssh-agent.c ssh-dss.c ssh-ecdsa.c ssh-ed25519.c]
[ssh-keygen.c ssh-rsa.c sshconnect.c sshconnect1.c sshconnect2.c]
[sshd.c]
convert memset of potentially-private data to explicit_bzero()
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[auth2-chall.c authfd.c authfile.c bufaux.c bufec.c canohost.c]
[channels.c cipher-chachapoly.c clientloop.c configure.ac hostfile.c]
[kexc25519.c krl.c monitor.c sandbox-systrace.c session.c]
[sftp-client.c ssh-keygen.c ssh.c sshconnect2.c sshd.c sshlogin.c]
[openbsd-compat/explicit_bzero.c openbsd-compat/openbsd-compat.h]
replace most bzero with explicit_bzero, except a few that cna be memset
ok djm dtucker
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[canohost.c clientloop.c match.c readconf.c sftp.c]
unsigned casts for ctype macros where neccessary
ok guenther millert markus
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[auth-options.c auth2-chall.c authfd.c channels.c cipher-3des1.c]
[clientloop.c gss-genr.c monitor_mm.c packet.c schnorr.c umac.c]
[sftp-client.c sftp-glob.c]
use calloc for all structure allocations; from markus@
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[clientloop.c]
fix connection crash when sending break (~B) on ControlPersist'd session;
ok dtucker@
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[channels.c channels.h clientloop.c]
Add an "ABANDONED" channel state and use for mux sessions that are
disconnected via the ~. escape sequence. Channels in this state will
be able to close if the server responds, but do not count as active channels.
This means that if you ~. all of the mux clients when using ControlPersist
on a broken network, the backgrounded mux master will exit when the
Control Persist time expires rather than hanging around indefinitely.
bz#1917, also reported and tested by tedu@. ok djm@ markus@.
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[clientloop.h clientloop.c mux.c]
No need for the mux cleanup callback to be visible so restore it to static
and call it through the detach_user function pointer. ok djm@
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[ssh-agent.c clientloop.c misc.h packet.c progressmeter.c misc.c
channels.c sandbox-systrace.c]
Use clock_gettime(CLOCK_MONOTONIC ...) for ssh timers so that things like
keepalives and rekeying will work properly over clock steps. Suggested by
markus@, "looks good" djm@.
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[xmalloc.h cipher.c sftp-glob.c ssh-keyscan.c ssh.c sftp-common.c
ssh-ecdsa.c auth2-chall.c compat.c readconf.c kexgexs.c monitor.c
gss-genr.c cipher-3des1.c kex.c monitor_wrap.c ssh-pkcs11-client.c
auth-options.c rsa.c auth2-pubkey.c sftp.c hostfile.c auth2.c
servconf.c auth.c authfile.c xmalloc.c uuencode.c sftp-client.c
auth2-gss.c sftp-server.c bufaux.c mac.c session.c jpake.c kexgexc.c
sshconnect.c auth-chall.c auth2-passwd.c sshconnect1.c buffer.c
kexecdhs.c kexdhs.c ssh-rsa.c auth1.c ssh-pkcs11.c auth2-kbdint.c
kexdhc.c sshd.c umac.c ssh-dss.c auth2-jpake.c bufbn.c clientloop.c
monitor_mm.c scp.c roaming_client.c serverloop.c key.c auth-rsa.c
ssh-pkcs11-helper.c ssh-keysign.c ssh-keygen.c match.c channels.c
sshconnect2.c addrmatch.c mux.c canohost.c kexecdhc.c schnorr.c
ssh-add.c misc.c auth2-hostbased.c ssh-agent.c bufec.c groupaccess.c
dns.c packet.c readpass.c authfd.c moduli.c]
bye, bye xfree(); ok markus@
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[ssh_config sshconnect2.c packet.c readconf.h readconf.c clientloop.c
ssh_config.5 packet.h]
Add an optional second argument to RekeyLimit in the client to allow
rekeying based on elapsed time in addition to amount of traffic.
with djm@ jmc@, ok djm
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[clientloop.c mux.c]
channel_setup_local_fwd_listener() returns 0 on failure, not -ve
bz#2055 reported by mathieu.lacage AT gmail.com
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[clientloop.c]
when muxmaster is run with -N, make it shut down gracefully when a client
sends it "-O stop" rather than hanging around (bz#1985). ok djm@
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[clientloop.c]
Merge escape help text for ~v and ~V; ok djm@
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[clientloop.c]
Print '^Z' instead of a raw ^Z when the sequence is not supported. ok djm@
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[clientloop.c]
Make the escape command help (~?) context sensitive so that only commands
that will work in the current session are shown. ok markus@
(note: previous commit with this description was a mistake on my part while
pulling changes from OpenBSD)
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[clientloop.c]
Make the escape command help (~?) context sensitive so that only commands
that will work in the current session are shown. ok markus@
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[clientloop.c log.c ssh.1 log.h]
Add ~v and ~V escape sequences to raise and lower the logging level
respectively. Man page help from jmc, ok deraadt jmc
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[clientloop.c clientloop.h mux.c]
Force a clean shutdown of ControlMaster client sessions when the ~. escape
sequence is used. This means that ~. should now work in mux clients even
if the server is no longer responding. Found by tedu, ok djm.
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[clientloop.c serverloop.c]
initialise accept() backoff timer to avoid EINVAL from select(2) in
rekeying
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[channels.c channels.h clientloop.c serverloop.c]
don't spin in accept() when out of fds (ENFILE/ENFILE) - back off for a
while; ok deraadt@ markus@
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[clientloop.c]
Ensure that $DISPLAY contains only valid characters before using it to
extract xauth data so that it can't be used to play local shell
metacharacter games. Report from r00t_ati at ihteam.net, ok markus.
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[channels.c channels.h clientloop.c ssh.1]
support cancellation of local/dynamic forwardings from ~C commandline;
ok & feedback djm@
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[channels.c channels.h clientloop.c clientloop.h mux.c ssh.c]
hook up a channel confirm callback to warn the user then requested X11
forwarding was refused by the server; ok markus@
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[clientloop.c]
setproctitle for a mux master that has been gracefully stopped;
bz#1911 from Bert.Wesarg AT googlemail.com
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