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2018-02-13upstream Don't reset signal handlers inside handlers.dtucker@openbsd.org
The signal handlers from the original ssh1 code on which OpenSSH is based assume unreliable signals and reinstall their handlers. Since OpenBSD (and pretty much every current system) has reliable signals this is not needed. In the unlikely even that -portable is still being used on such systems we will deal with it in the compat layer. ok deraadt@ OpenBSD-Commit-ID: f53a1015cb6908431b92116130d285d71589612c
2018-01-23upstream commitdjm@openbsd.org
Drop compatibility hacks for some ancient SSH implementations, including ssh.com <=2.* and OpenSSH <= 3.*. These versions were all released in or before 2001 and predate the final SSH RFCs. The hacks in question aren't necessary for RFC- compliant SSH implementations. ok markus@ OpenBSD-Commit-ID: 4be81c67db57647f907f4e881fb9341448606138
2017-12-19upstream commitdjm@openbsd.org
unbreak hostkey rotation; attempting to sign with a desired signature algorithm of kex->hostkey_alg is incorrect when the key type isn't capable of making those signatures. ok markus@ OpenBSD-Commit-ID: 35ae46864e1f5859831ec0d115ee5ea50953a906
2017-12-19upstream commitdjm@openbsd.org
pass negotiated signing algorithm though to sshkey_verify() and check that the negotiated algorithm matches the type in the signature (only matters for RSA SHA1/SHA2 sigs). ok markus@ OpenBSD-Commit-ID: 735fb15bf4adc060d3bee9d047a4bcaaa81b1af9
2017-11-28upstream commitdtucker@openbsd.org@openbsd.org
Remove get_current_time() and replace with calls to monotime_double() which uses CLOCK_MONOTONIC and works over clock steps. "I like" markus@ OpenBSD-Commit-ID: 3ad2f7d2414e2cfcaef99877a7a5b0baf2242952
2017-10-23upstream commitdjm@openbsd.org
Expose devices allocated for tun/tap forwarding. At the client, the device may be obtained from a new %T expansion for LocalCommand. At the server, the allocated devices will be listed in a SSH_TUNNEL variable exposed to the environment of any user sessions started after the tunnel forwarding was established. ok markus Upstream-ID: e61e53f8ae80566e9ddc0d67a5df5bdf2f3c9f9e
2017-09-19upstream commitdjm@openbsd.org
fix use-after-free in ~^Z escape handler path, introduced in channels.c refactor; spotted by millert@ "makes sense" deraadt@ Upstream-ID: 8fa2cdc65c23ad6420c1e59444b0c955b0589b22
2017-09-12adapt portable to channels API changesDamien Miller
2017-09-12upstream commitdjm@openbsd.org
Make remote channel ID a u_int Previously we tracked the remote channel IDs in an int, but this is strictly incorrect: the wire protocol uses uint32 and there is nothing in-principle stopping a SSH implementation from sending, say, 0xffff0000. In practice everyone numbers their channels sequentially, so this has never been a problem. ok markus@ Upstream-ID: b9f4cd3dc53155b4a5c995c0adba7da760d03e73
2017-09-12upstream commitdjm@openbsd.org
refactor channels.c Move static state to a "struct ssh_channels" that is allocated at runtime and tracked as a member of struct ssh. Explicitly pass "struct ssh" to all channels functions. Replace use of the legacy packet APIs in channels.c. Rework sshd_config PermitOpen handling: previously the configuration parser would call directly into the channels layer. After the refactor this is not possible, as the channels structures are allocated at connection time and aren't available when the configuration is parsed. The server config parser now tracks PermitOpen itself and explicitly configures the channels code later. ok markus@ Upstream-ID: 11828f161656b965cc306576422613614bea2d8f
2017-09-04upstream commitdjm@openbsd.org
pass packet state down to some of the channels function (more to come...); ok markus@ Upstream-ID: d8ce7a94f4059d7ac1e01fb0eb01de0c4b36c81b
2017-07-21upstream commitdtucker@openbsd.org
Make ""Killed by signal 1" LogLevel verbose so it's not shown at the default level. Prevents it from appearing during ssh -J and equivalent ProxyCommand configs. bz#1906, bz#2744, feedback&ok markus@ Upstream-ID: debfaa7e859b272246c2f2633335d288d2e2ae28
2017-06-24upstream commitmestre@openbsd.org
When using the escape sequence &~ the code path is client_loop() -> client_simple_escape_filter() -> process_escapes() -> fork() and the pledge for this path lacks the proc promise and therefore aborts the process. The solution is to just add proc the promise to this specific pledge. Reported by Gregoire Jadi gjadi ! omecha.info Insight with tb@, OK jca@ Upstream-ID: 63c05e30c28209519f476023b65b0b1b0387a05b
2017-06-01upstream commitderaadt@openbsd.org
Switch to recallocarray() for a few operations. Both growth and shrinkage are handled safely, and there also is no need for preallocation dances. Future changes in this area will be less error prone. Review and one bug found by markus Upstream-ID: 822d664d6a5a1d10eccb23acdd53578a679d5065
2017-06-01upstream commitmarkus@openbsd.org
remove now obsolete ctx from ssh_dispatch_run; ok djm@ Upstream-ID: 9870aabf7f4d71660c31fda91b942b19a8e68d29
2017-05-31upstream commitmarkus@openbsd.org
protocol handlers all get struct ssh passed; ok djm@ Upstream-ID: 0ca9ea2a5d01a6d2ded94c5024456a930c5bfb5d
2017-05-08upstream commitnaddy@openbsd.org
remove miscellaneous SSH1 leftovers; ok markus@ Upstream-ID: af23696022ae4d45a1abc2fb8b490d8d9dd63b7c
2017-05-01upstream commitdjm@openbsd.org
obliterate ssh1.h and some dead code that used it ok markus@ Upstream-ID: 1ca9159a9fb95618f9d51e069ac8e1131a087343
2017-05-01upstream commitdjm@openbsd.org
remove SSHv1-related buffers from client code Upstream-ID: dca5d01108f891861ceaf7ba1c0f2eb274e0c7dd
2017-05-01upstream commitdjm@openbsd.org
remove KEY_RSA1 ok markus@ Upstream-ID: 7408517b077c892a86b581e19f82a163069bf133
2017-05-01upstream commitdjm@openbsd.org
remove compat20/compat13/compat15 variables ok markus@ Upstream-ID: 43802c035ceb3fef6c50c400e4ecabf12354691c
2017-03-10upstream commitdjm@openbsd.org
When updating hostkeys, accept RSA keys if HostkeyAlgorithms contains any RSA keytype. Previously, ssh could ignore RSA keys when any of the ssh-rsa-sha2-* methods was enabled in HostkeyAlgorithms nit ssh-rsa (SHA1 signatures) was not. bz#2650 reported by Luis Ressel; ok dtucker@ Upstream-ID: c5e8cfee15c42f4a05d126158a0766ea06da79d2
2017-01-30upstream commitdtucker@openbsd.org
Fix typo in ~C error message for bad port forward cancellation. bz#2672, from Brad Marshall via Colin Watson and Ubuntu's bugtracker. Upstream-ID: 0d4a7e5ead6cc59c9a44b4c1e5435ab3aada09af
2016-10-01upstream commitmarkus@openbsd.org
ssh proxy mux mode (-O proxy; idea from Simon Tatham): - mux client speaks the ssh-packet protocol directly over unix-domain socket. - mux server acts as a proxy, translates channel IDs and relays to the server. - no filedescriptor passing necessary. - combined with unix-domain forwarding it's even possible to run mux client and server on different machines. feedback & ok djm@ Upstream-ID: 666a2fb79f58e5c50e246265fb2b9251e505c25b
2016-09-21upstream committedu@openbsd.org
replace two arc4random loops with arc4random_buf ok deraadt natano Upstream-ID: e18ede972d1737df54b49f011fa4f3917a403f48
2016-09-12upstream commitderaadt@openbsd.org
Add MAXIMUM(), MINIMUM(), and ROUNDUP() to misc.h, then use those definitions rather than pulling <sys/param.h> and unknown namespace pollution. ok djm markus dtucker Upstream-ID: 712cafa816c9f012a61628b66b9fbd5687223fb8
2016-07-23upstream commitdjm@openbsd.org
fix pledge violation with ssh -f; reported by Valentin Kozamernik ok dtucker@ Upstream-ID: a61db7988db88d9dac3c4dd70e18876a8edf84aa
2016-07-14upstream committb@openbsd.org
Add missing "recvfd" pledge promise: Raf Czlonka reported ssh coredumps when Control* keywords were set in ssh_config. This patch also fixes similar problems with scp and sftp. ok deraadt, looks good to millert Upstream-ID: ca2099eade1ef3e87a79614fefa26a0297ad8a3b
2016-02-08upstream commitdjm@openbsd.org
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
2016-02-05upstream commitmillert@openbsd.org
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
2016-01-30upstream commitdtucker@openbsd.org
Remove leftover roaming dead code. ok djm markus. Upstream-ID: 13d1f9c8b65a5109756bcfd3b74df949d53615be
2016-01-27upstream commitjsg@openbsd.org
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
2016-01-27upstream commitmarkus@openbsd.org
remove roaming support; ok djm@ Upstream-ID: 2cab8f4b197bc95776fb1c8dc2859dad0c64dc56
2016-01-14upstream commitdjm@openbsd.org
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
2016-01-07upstream commitsemarie@openbsd.org
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
2015-12-04upstream commitsemarie@openbsd.org
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
2015-10-25upstream commitmmcc@openbsd.org
Replace a function-local allocation with stack memory. ok djm@ Upstream-ID: c09fbbab637053a2ab9f33ca142b4e20a4c5a17e
2015-07-15upstream commitmarkus@openbsd.org
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
2015-07-01upstream commitdjm@openbsd.org
better refuse ForwardX11Trusted=no connections attempted after ForwardX11Timeout expires; reported by Jann Horn Upstream-ID: bf0fddadc1b46a0334e26c080038313b4b6dea21
2015-05-10upstream commitdjm@openbsd.org
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@
2015-02-26upstream commitdjm@openbsd.org
fix small memory leak when UpdateHostkeys=no
2015-02-24upstream commitdjm@openbsd.org
fix setting/clearing of TTY raw mode around UpdateHostKeys=ask confirmation question; reported by Herb Goldman
2015-02-21upstream commitdjm@openbsd.org
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)
2015-02-17upstream commitdjm@openbsd.org
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@
2015-02-17upstream commitdjm@openbsd.org
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
2015-01-27upstream commitdjm@openbsd.org
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@
2015-01-26upstream commitderaadt@openbsd.org
Reduce use of <sys/param.h> and transition to <limits.h> throughout. ok djm markus
2015-01-20upstream commitmarkus@openbsd.org
adapt kex to sshbuf and struct ssh; ok djm@
2015-01-20upstream commitmarkus@openbsd.org
move dispatch to struct ssh; ok djm@
2015-01-20upstream commitmarkus@openbsd.org
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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