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path: root/sshd.c
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2016-12-14upstream commitdjm@openbsd.org
log connections dropped in excess of MaxStartups at verbose LogLevel; bz#2613 based on diff from Tomas Kuthan; ok dtucker@ Upstream-ID: 703ae690dbf9b56620a6018f8a3b2389ce76d92b
2016-12-05upstream commitdtucker@openbsd.org
Unlink PidFile on SIGHUP and always recreate it when the new sshd starts. Regression tests (and possibly other things) depend on the pidfile being recreated after SIGHUP, and unlinking it means it won't contain a stale pid if sshd fails to restart. ok djm@ markus@ Upstream-ID: 132dd6dda0c77dd49d2f15b2573b5794f6160870
2016-11-30upstream commitdtucker@openbsd.org
On startup, check to see if sshd is already daemonized and if so, skip the call to daemon() and do not rewrite the PidFile. This means that when sshd re-execs itself on SIGHUP the process ID will no longer change. Should address bz#2641. ok djm@ markus@. Upstream-ID: 5ea0355580056fb3b25c1fd6364307d9638a37b9
2016-11-30factor out common PRNG reseed before privdropDamien Miller
Add a call to RAND_poll() to ensure than more than pid+time gets stirred into child processes states. Prompted by analysis from Jann Horn at Project Zero. ok dtucker@
2016-11-29upstream commitdtucker@openbsd.org
Factor out code to disconnect from controlling terminal into its own function. ok djm@ Upstream-ID: 39fd9e8ebd7222615a837312face5cc7ae962885
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
2016-08-29upstream commitdjm@openbsd.org
fix uninitialised optlen in getsockopt() call; harmless on Unix/BSD but potentially crashy on Cygwin. Reported by James Slepicka ok deraadt@ Upstream-ID: 1987ccee508ba5b18f016c85100d7ac3f70ff965
2016-08-23upstream commitdjm@openbsd.org
remove UseLogin option and support for having /bin/login manage login sessions; ok deraadt markus dtucker Upstream-ID: bea7213fbf158efab7e602d9d844fba4837d2712
2016-08-23upstream commitnaddy@openbsd.org
Remove more SSH1 server code: * Drop sshd's -k option. * Retire configuration keywords that only apply to protocol 1, as well as the "protocol" keyword. * Remove some related vestiges of protocol 1 support. ok markus@ Upstream-ID: 9402f82886de917779db12f8ee3f03d4decc244d
2016-08-14upstream commitmarkus@openbsd.org
remove ssh1 server code; ok djm@ Upstream-ID: c24c0c32c49b91740d5a94ae914fb1898ea5f534
2016-08-03upstream commitdtucker@openbsd.org
Fix bug introduced in rev 1.467 which causes "buffer_get_bignum_ret: incomplete message" errors when built with WITH_SSH1 and run such that no Protocol 1 ephemeral host key is generated (eg "Protocol 2", no SSH1 host key supplied). Reported by rainer.laatsch at t-online.de, ok deraadt@ Upstream-ID: aa6b132da5c325523aed7989cc5a320497c919dc
2016-06-06upstream commitdtucker@openbsd.org
KNF compression proposal and simplify the client side a little. ok djm@ Upstream-ID: aa814b694efe9e5af8a26e4c80a05526ae6d6605
2016-05-03upstream commitdjm@openbsd.org
unbreak config parsing on reexec from previous commit Upstream-ID: bc69932638a291770955bd05ca55a32660a613ab
2016-05-02upstream commitdjm@openbsd.org
add support for additional fixed DH groups from draft-ietf-curdle-ssh-kex-sha2-03 diffie-hellman-group14-sha256 (2K group) diffie-hellman-group16-sha512 (4K group) diffie-hellman-group18-sha512 (8K group) based on patch from Mark D. Baushke and Darren Tucker ok markus@ Upstream-ID: ac00406ada4f0dfec41585ca0839f039545bc46f
2016-05-02upstream commitdjm@openbsd.org
fix signed/unsigned errors reported by clang-3.7; add sshbuf_dup_string() to replace a common idiom of strdup(sshbuf_ptr()) with better safety checking; feedback and ok markus@ Upstream-ID: 71f926d9bb3f1efed51319a6daf37e93d57c8820
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
2016-02-16upstream commitdtucker@openbsd.org
Add a function to enable security-related malloc_options. With and ok deraadt@, something similar has been in the snaps for a while. Upstream-ID: 43a95523b832b7f3b943d2908662191110c380ed
2016-01-30upstream commitdtucker@openbsd.org
Allow RekeyLimits in excess of 4G up to 2**63 bits (limited by the return type of scan_scaled). Part of bz#2521, ok djm. Upstream-ID: 13bea82be566b9704821b1ea05bf7804335c7979
2016-01-27upstream commitmarkus@openbsd.org
remove roaming support; ok djm@ Upstream-ID: 2cab8f4b197bc95776fb1c8dc2859dad0c64dc56
2015-12-11upstream commitmmcc@openbsd.org
Remove NULL-checks before free(). ok dtucker@ Upstream-ID: e3d3cb1ce900179906af36517b5eea0fb15e6ef8
2015-12-07upstream commitmarkus@openbsd.org
implement SHA2-{256,512} for RSASSA-PKCS1-v1_5 signatures (user and host auth) based on draft-rsa-dsa-sha2-256-03.txt and draft-ssh-ext-info-04.txt; with & ok djm@ Upstream-ID: cf82ce532b2733e5c4b34bb7b7c94835632db309
2015-11-17upstream commitdjm@openbsd.org
always call privsep_preauth_child() regardless of whether sshd was started by root; it does important priming before sandboxing and failing to call it could result in sandbox violations later; ok markus@ Upstream-ID: c8a6d0d56c42f3faab38460dc917ca0d1705d383
2015-11-14read back from libcrypto RAND when privdroppingDamien Miller
makes certain libcrypto implementations cache a /dev/urandom fd in preparation of sandboxing. Based on patch by Greg Hartman.
2015-09-11upstream commitdtucker@openbsd.org
Plug minor memory leaks when options are used more than once. bz#2182, patch from Tiago Cunha, ok deraadt djm Upstream-ID: 5b84d0401e27fe1614c10997010cc55933adb48e
2015-08-21upstream commitderaadt@openbsd.org
Do not cast result of malloc/calloc/realloc* if stdlib.h is in scope ok krw millert Upstream-ID: 5e50ded78cadf3841556649a16cc4b1cb6c58667
2015-07-30upstream commitdjm@openbsd.org
Allow ssh_config and sshd_config kex parameters options be prefixed by a '+' to indicate that the specified items be appended to the default rather than replacing it. approach suggested by dtucker@, feedback dlg@, ok markus@ Upstream-ID: 0f901137298fc17095d5756ff1561a7028e8882a
2015-07-17upstream commitdjm@openbsd.org
fix incorrect test for SSH1 keys when compiled without SSH1 support Upstream-ID: 6004d720345b8e481c405e8ad05ce2271726e451
2015-07-15upstream commitdjm@openbsd.org
fix NULL-deref when SSH1 reenabled Upstream-ID: f22fd805288c92b3e9646782d15b48894b2d5295
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
2015-07-15upstream commitdjm@openbsd.org
refuse to generate or accept RSA keys smaller than 1024 bits; feedback and ok dtucker@ Upstream-ID: 7ea3d31271366ba264f06e34a3539bf1ac30f0ba
2015-07-15upstream commitdjm@openbsd.org
turn off 1024 bit diffie-hellman-group1-sha1 key exchange method (already off in server, this turns it off in the client by default too) ok dtucker@ Upstream-ID: f59b88f449210ab7acf7d9d88f20f1daee97a4fa
2015-07-15upstream commitdjm@openbsd.org
delete support for legacy v00 certificates; "sure" markus@ dtucker@ Upstream-ID: b5b9bb5f9202d09e88f912989d74928601b6636f
2015-05-25upstream commitdjm@openbsd.org
add missing 'c' option to getopt(), case statement was already there; from Felix Bolte Upstream-ID: 9b19b4e2e0b54d6fefa0dfac707c51cf4bae3081
2015-05-21upstream commitdjm@openbsd.org
add AuthorizedPrincipalsCommand that allows getting authorized_principals from a subprocess rather than a file, which is quite useful in deployments with large userbases feedback and ok markus@ Upstream-ID: aa1bdac7b16fc6d2fa3524ef08f04c7258d247f6
2015-04-29upstream commitdjm@openbsd.org
allow "sshd -f none" to skip reading the config file, much like "ssh -F none" does. ok dtucker
2015-04-29upstream commitdtucker@openbsd.org
Plug leak of address passed to logging. bz#2373, patch from jjelen at redhat, ok markus@
2015-04-13upstream commitdtucker@openbsd.org
Don't send hostkey advertisments (hostkeys-00@openssh.com) to current versions of Tera Term as they can't handle them. Newer versions should be OK. Patch from Bryan Drewery and IWAMOTO Kouichi, ok djm@
2015-04-01upstream commitdjm@openbsd.org
don't fatal when a !ssh1 sshd is reexeced from a w/ssh1 listener; reported by miod@; ok miod@ markus@
2015-02-23Repair for non-ECC OpenSSL.Darren Tucker
Ifdef out the ECC parts when building with an OpenSSL that doesn't have it.
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
partial backout of: revision 1.441 date: 2015/01/31 20:30:05; author: djm; state: Exp; lines: +17 -10; commitid : x8klYPZMJSrVlt3O; Let sshd load public host keys even when private keys are missing. Allows sshd to advertise additional keys for future key rotation. Also log fingerprint of hostkeys loaded; ok markus@ hostkey updates now require access to the private key, so we can't load public keys only. The improved log messages (fingerprints of keys loaded) are kept.
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@
2015-02-01upstream commitdjm@openbsd.org
Let sshd load public host keys even when private keys are missing. Allows sshd to advertise additional keys for future key rotation. Also log fingerprint of hostkeys loaded; ok markus@
2015-01-27upstream commitdjm@openbsd.org
correctly match ECDSA subtype (== curve) for offered/recevied host keys. Fixes connection-killing host key mismatches when a server offers multiple ECDSA keys with different curve type (an extremely unlikely configuration). ok markus, "looks mechanical" deraadt@
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
2015-01-26upstream commitmarkus@openbsd.org
kex_setup errors are fatal()
2015-01-20upstream commitmarkus@openbsd.org
store compat flags in struct ssh; ok djm@
2015-01-20upstream commitmarkus@openbsd.org
adapt kex to sshbuf and 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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