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2018-07-10upstream: client: switch to sshbuf API; ok djm@markus@openbsd.org
OpenBSD-Commit-ID: 60cb0356114acc7625ab85105f6f6a7cd44a8d05
2018-07-10upstream: Revert previous two commitssf@openbsd.org
It turns out we still support pre-auth compression on the client. Therefore revert the previous two commits: date: 2018/07/06 09:06:14; author: sf; commitid: yZVYKIRtUZWD9CmE; Rename COMP_DELAYED to COMP_ZLIB Only delayed compression is supported nowadays. ok markus@ date: 2018/07/06 09:05:01; author: sf; commitid: rEGuT5UgI9f6kddP; Remove leftovers from pre-authentication compression Support for this has been removed in 2016. COMP_DELAYED will be renamed in a later commit. ok markus@ OpenBSD-Commit-ID: cdfef526357e4e1483c86cf599491b2dafb77772
2018-07-10upstream: Rename COMP_DELAYED to COMP_ZLIBsf@openbsd.org
Only delayed compression is supported nowadays. ok markus@ OpenBSD-Commit-ID: 5b1dbaf3d9a4085aaa10fec0b7a4364396561821
2018-07-10upstream: Remove leftovers from pre-authentication compressionsf@openbsd.org
Support for this has been removed in 2016. COMP_DELAYED will be renamed in a later commit. ok markus@ OpenBSD-Commit-ID: 6a99616c832627157113fcb0cf5a752daf2e6b58
2018-07-10upstream: Remove unused ssh_packet_start_compression()sf@openbsd.org
ok markus@ OpenBSD-Commit-ID: 9d34cf2f59aca5422021ae2857190578187dc2b4
2018-06-01upstream: make ssh_remote_ipaddr() capable of being called afterdjm@openbsd.org
the ssh->state has been torn down; bz#2773 OpenBSD-Commit-ID: 167f12523613ca3d16d7716a690e7afa307dc7eb
2018-05-25upstream: If select() fails in ssh_packet_read_seqnr go directly todtucker@openbsd.org
the error path instead of trying to read from the socket on the way out, which resets errno and causes the true error to be misreported. ok djm@ OpenBSD-Commit-ID: 2614edaadbd05a957aa977728aa7a030af7c6f0a
2018-04-10Many typo fixes from Karsten WeissDamien Miller
Spotted using https://github.com/lucasdemarchi/codespell
2017-12-19upstream commitdjm@openbsd.org
pass kex->hostkey_alg and kex->hostkey_nid from pre-auth to post-auth unpriviledged child processes; ok markus@ OpenBSD-Commit-ID: 4a35bc7af0a5f8a232d1361f79f4ebc376137302
2017-12-12upstream commitdtucker@openbsd.org
Put remote client info back into the ClientAlive connection termination message. Based in part on diff from lars.nooden at gmail, ok djm OpenBSD-Commit-ID: 80a0f619a29bbf2f32eb5297a69978a0e05d0ee0
2017-11-28upstream commitdtucker@openbsd.org@openbsd.org
Add monotime_ts and monotime_tv that return monotonic timespec and timeval respectively. Replace calls to gettimeofday() in packet timing with monotime_tv so that the callers will work over a clock step. Should prevent integer overflow during clock steps reported by wangle6 at huawei.com. "I like" markus@ OpenBSD-Commit-ID: 74d684264814ff806f197948b87aa732cb1b0b8a
2017-10-25upstream commitdjm@openbsd.org
add sshd_config RDomain keyword to place sshd and the subsequent user session (including the shell and any TCP/IP forwardings) into the specified rdomain(4) ok markus@ Upstream-ID: be2358e86346b5cacf20d90f59f980b87d1af0f5
2017-10-20upstream commitdjm@openbsd.org
log debug messages sent to peer; ok deraadt markus Upstream-ID: 3b4fdc0a06ea5083f61d96e20043000f477103d9
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
2017-07-24upstream commitdjm@openbsd.org
Allow IPQoS=none in ssh/sshd to not set an explicit ToS/DSCP value and just use the operating system default; ok dtucker@ Upstream-ID: 77906ff8c7b660b02ba7cb1e47b17d66f54f1f7e
2017-06-24upstream commitdjm@openbsd.org
don't pass pointer to struct sshcipher between privsep processes, just redo the lookup in each using the already-passed cipher name. bz#2704 based on patch from Brooks Davis; ok markus dtucker Upstream-ID: 2eab434c09bdf549dafd7da3e32a0d2d540adbe0
2017-06-10upstream commitdtucker@openbsd.org
Add comments referring to the relevant RFC sections for rekeying behaviour. Upstream-ID: 6fc8e82485757a27633f9175ad00468f49a07d40
2017-06-07upstream commitdtucker@openbsd.org
Fix compression output stats broken in rev 1.201. Patch originally by Russell Coker via Debian bug #797964 and Christoph Biedl. ok djm@ Upstream-ID: 83a1903b95ec2e4ed100703debb4b4a313b01016
2017-06-01upstream commitdjm@openbsd.org
some warnings spotted by clang; ok markus@ Upstream-ID: 24381d68ca249c5cee4388ceb0f383fa5b43991b
2017-06-01upstream commitderaadt@openbsd.org
These shutdown() SHUT_RDWR are not needed before close() ok djm markus claudio Upstream-ID: 36f13ae4ba10f5618cb9347933101eb4a98dbcb5
2017-06-01upstream commitmarkus@openbsd.org
clear session keys from memory; ok djm@ Upstream-ID: ecd178819868975affd5fd6637458b7c712b6a0f
2017-05-08upstream commitdjm@openbsd.org
helps if I commit the correct version of the file. fix missing return statement. Upstream-ID: c86394a3beeb1ec6611e659bfa830254f325546c
2017-05-08upstream commitdjm@openbsd.org
I was too aggressive with the scalpel in the last commit; unbreak sshd, spotted quickly by naddy@ Upstream-ID: fb7e75d2b2c7e6ca57dee00ca645e322dd49adbf
2017-05-08upstream commitdjm@openbsd.org
As promised in last release announcement: remove support for Blowfish, RC4 and CAST ciphers. ok markus@ deraadt@ Upstream-ID: 21f8facdba3fd8da248df6417000867cec6ba222
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 the (in)famous SSHv1 CRC compensation attack detector. Despite your cameo in The Matrix movies, you will not be missed. ok markus Upstream-ID: 44261fce51a56d93cdb2af7b6e184be629f667e0
2017-05-01upstream commitdjm@openbsd.org
remove SSHv1 support from packet and buffer APIs ok markus@ Upstream-ID: bfc290053d40b806ecac46317d300677d80e1dc9
2017-05-01upstream commitdjm@openbsd.org
remove compat20/compat13/compat15 variables ok markus@ Upstream-ID: 43802c035ceb3fef6c50c400e4ecabf12354691c
2017-05-01upstream commitdjm@openbsd.org
unifdef WITH_SSH1 ok markus@ Upstream-ID: 9716e62a883ef8826c57f4d33b4a81a9cc7755c7
2017-03-12upstream commitmarkus@openbsd.org
Don't count the initial block twice when computing how many bytes to discard for the work around for the attacks against CBC-mode. ok djm@; report from Jean Paul, Kenny, Martin and Torben @ RHUL Upstream-ID: f445f509a4e0a7ba3b9c0dae7311cb42458dc1e2
2017-02-28upstream commitdjm@openbsd.org
small memleak: free fd_set on connection timeout (though we are heading to exit anyway). From Tom Rix in bz#2683 Upstream-ID: 10e3dadbb8199845b66581473711642d9e6741c4
2017-02-04upstream commitdjm@openbsd.org
add ssh_packet_set_log_preamble() to allow inclusion of a preamble string in disconnect messages; ok markus@ Upstream-ID: 34cb41182cd76d414c214ccb01c01707849afead
2017-02-03upstream commitdtucker@openbsd.org
Make ssh_packet_set_rekey_limits take u32 for the number of seconds until rekeying (negative values are rejected at config parse time). This allows the removal of some casts and a signed vs unsigned comparison warning. rekey_time is cast to int64 for the comparison which is a no-op on OpenBSD, but should also do the right thing in -portable on anything still using 32bit time_t (until the system time actually wraps, anyway). some early guidance deraadt@, ok djm@ Upstream-ID: c9f18613afb994a07e7622eb326f49de3d123b6c
2016-10-13upstream commitdjm@openbsd.org
Add a per-packet input hook that is called with the decrypted packet contents. This will be used for fuzzing; ok markus@ Upstream-ID: a3221cee6b1725dd4ae1dd2c13841b4784cb75dc
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
2016-09-29upstream commitdjm@openbsd.org
put back some pre-auth zlib bits that I shouldn't have removed - they are still used by the client. Spotted by naddy@ Upstream-ID: 80919468056031037d56a1f5b261c164a6f90dc2
2016-09-29upstream commitdjm@openbsd.org
restore pre-auth compression support in the client -- the previous commit was intended to remove it from the server only. remove a few server-side pre-auth compression bits that escaped adjust wording of Compression directive in sshd_config(5) pointed out by naddy@ ok markus@ Upstream-ID: d23696ed72a228dacd4839dd9f2dec424ba2016b
2016-09-29upstream commitdjm@openbsd.org
Remove support for pre-authentication compression. Doing compression early in the protocol probably seemed reasonable in the 1990s, but today it's clearly a bad idea in terms of both cryptography (cf. multiple compression oracle attacks in TLS) and attack surface. Moreover, to support it across privilege-separation zlib needed the assistance of a complex shared-memory manager that made the required attack surface considerably larger. Prompted by Guido Vranken pointing out a compiler-elided security check in the shared memory manager found by Stack (http://css.csail.mit.edu/stack/); ok deraadt@ markus@ NB. pre-auth authentication has been disabled by default in sshd for >10 years. Upstream-ID: 32af9771788d45a0779693b41d06ec199d849caf
2016-09-21upstream commitmarkus@openbsd.org
move inbound NEWKEYS handling to kex layer; otherwise early NEWKEYS causes NULL deref; found by Robert Swiecki/honggfuzz; fixed with & ok djm@ Upstream-ID: 9a68b882892e9f51dc7bfa9f5a423858af358b2f
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
2016-09-12upstream commitmarkus@openbsd.org
ssh_set_newkeys: print correct block counters on rekeying; ok djm@ Upstream-ID: 32bb7a9cb9919ff5bab28d50ecef3a2b2045dd1e
2016-08-09upstream commitdjm@openbsd.org
small refactor of cipher.c: make ciphercontext opaque to callers feedback and ok markus@ Upstream-ID: 094849f8be68c3bdad2c0f3dee551ecf7be87f6f
2016-07-22upstream commitmarkus@openbsd.org
Reduce timing attack against obsolete CBC modes by always computing the MAC over a fixed size of data. Reported by Jean Paul Degabriele, Kenny Paterson, Torben Hansen and Martin Albrecht. ok djm@ Upstream-ID: f20a13279b00ba0afbacbcc1f04e62e9d41c2912
2016-07-18upstream commitdjm@openbsd.org
Add some unsigned overflow checks for extra_pad. None of these are reachable with the amount of padding that we use internally. bz#2566, pointed out by Torben Hansen. ok markus@ Upstream-ID: 4d4be8450ab2fc1b852d5884339f8e8c31c3fd76
2016-07-15upstream commitdtucker@openbsd.org
Reduce the syslog level of some relatively common protocol events from LOG_CRIT by replacing fatal() calls with logdie(). Part of bz#2585, ok djm@ Upstream-ID: 9005805227c94edf6ac02a160f0e199638d288e5
2016-07-08upstream commitdjm@openbsd.org
Improve crypto ordering for Encrypt-then-MAC (EtM) mode MAC algorithms. Previously we were computing the MAC, decrypting the packet and then checking the MAC. This gave rise to the possibility of creating a side-channel oracle in the decryption step, though no such oracle has been identified. This adds a mac_check() function that computes and checks the MAC in one pass, and uses it to advance MAC checking for EtM algorithms to before payload decryption. Reported by Jean Paul Degabriele, Kenny Paterson, Torben Hansen and Martin Albrecht. feedback and ok markus@ Upstream-ID: 1999bb67cab47dda5b10b80d8155fe83d4a1867b
2016-03-08upstream commitdjm@openbsd.org
refactor canohost.c: move functions that cache results closer to the places that use them (authn and session code). After this, no state is cached in canohost.c feedback and ok markus@ Upstream-ID: 5f2e4df88d4803fc8ec59ec53629105e23ce625e
2016-02-18upstream commitdjm@openbsd.org
rekey refactor broke SSH1; spotted by Tom G. Christensen Upstream-ID: 43f0d57928cc077c949af0bfa71ef574dcb58243
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
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