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2018-12-27upstream: move client/server SSH-* banners to buffers underdjm@openbsd.org
ssh->kex and factor out the banner exchange. This eliminates some common code from the client and server. Also be more strict about handling \r characters - these should only be accepted immediately before \n (pointed out by Jann Horn). Inspired by a patch from Markus Schmidt. (lots of) feedback and ok markus@ OpenBSD-Commit-ID: 1cc7885487a6754f63641d7d3279b0941890275b
2018-12-27upstream: only consider the ext-info-c extension during the initialdjm@openbsd.org
KEX. It shouldn't be sent in subsequent ones, but if it is present we should ignore it. This prevents sshd from sending a SSH_MSG_EXT_INFO for REKEX for buggy these clients. Reported by Jakub Jelen via bz2929; ok dtucker@ OpenBSD-Commit-ID: 91564118547f7807030ec537480303e2371902f9
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
2018-07-04upstream: repair PubkeyAcceptedKeyTypes (and friends) after RSAdjm@openbsd.org
signature work - returns ability to add/remove/specify algorithms by wildcard. Algorithm lists are now fully expanded when the server/client configs are finalised, so errors are reported early and the config dumps (e.g. "ssh -G ...") now list the actual algorithms selected. Clarify that, while wildcards are accepted in algorithm lists, they aren't full pattern-lists that support negation. (lots of) feedback, ok markus@ OpenBSD-Commit-ID: a8894c5c81f399a002f02ff4fe6b4fa46b1f3207
2018-07-03upstream: Improve strictness and control over RSA-SHA2 signaturedjm@openbsd.org
In ssh, when an agent fails to return a RSA-SHA2 signature when requested and falls back to RSA-SHA1 instead, retry the signature to ensure that the public key algorithm sent in the SSH_MSG_USERAUTH matches the one in the signature itself. In sshd, strictly enforce that the public key algorithm sent in the SSH_MSG_USERAUTH message matches what appears in the signature. Make the sshd_config PubkeyAcceptedKeyTypes and HostbasedAcceptedKeyTypes options control accepted signature algorithms (previously they selected supported key types). This allows these options to ban RSA-SHA1 in favour of RSA-SHA2. Add new signature algorithms "rsa-sha2-256-cert-v01@openssh.com" and "rsa-sha2-512-cert-v01@openssh.com" to force use of RSA-SHA2 signatures with certificate keys. feedback and ok markus@ OpenBSD-Commit-ID: c6e9f6d45eed8962ad502d315d7eaef32c419dde
2018-02-08upstream commitjsing@openbsd.org
Remove all guards for calls to OpenSSL free functions - all of these functions handle NULL, from at least OpenSSL 1.0.1g onwards. Prompted by dtucker@ asking about guards for RSA_free(), when looking at openssh-portable pr#84 on github. ok deraadt@ dtucker@ OpenBSD-Commit-ID: 954f1c51b94297d0ae1f749271e184141e0cadae
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
2017-06-13upstream commitdjm@openbsd.org
Do not require that unknown EXT_INFO extension values not contain \0 characters. This would cause fatal connection errors if an implementation sent e.g. string-encoded sub-values inside a value. Reported by Denis Bider; ok markus@ Upstream-ID: 030e10fdc605563c040244c4b4f1d8ae75811a5c
2017-05-31upstream commitmarkus@openbsd.org
protocol handlers all get struct ssh passed; ok djm@ Upstream-ID: 0ca9ea2a5d01a6d2ded94c5024456a930c5bfb5d
2017-05-01upstream commitdjm@openbsd.org
unifdef WITH_SSH1 ok markus@ Upstream-ID: 9716e62a883ef8826c57f4d33b4a81a9cc7755c7
2017-03-29Remove SHA256 EVP wrapper implementation.Darren Tucker
All supported versions of OpenSSL should now have SHA256 so remove our EVP wrapper implementaion. ok djm@
2017-03-17upstream commitmarkus@openbsd.org
disallow KEXINIT before NEWKEYS; ok djm; report by vegard.nossum at oracle.com Upstream-ID: 3668852d1f145050e62f1da08917de34cb0c5234
2017-03-10upstream commitdjm@openbsd.org
fix regression in 7.4 server-sig-algs, where we were accidentally excluding SHA2 RSA signature methods. bz#2680, patch from Nuno Goncalves; ok dtucker@ Upstream-ID: 81ac8bfb30960447740b9b8f6a214dcf322f12e8
2017-03-10upstream commitdtucker@openbsd.org
Plug some mem leaks mostly on error paths. From jjelen at redhat.com via bz#2687, ok djm@ Upstream-ID: 3fb030149598957a51b7c8beb32bf92cf30c96f2
2017-02-04upstream commitdjm@openbsd.org
support =- for removing methods from algorithms lists, e.g. Ciphers=-*cbc; suggested by Cristian Ionescu-Idbohrn in bz#2671 "I like it" markus@ Upstream-ID: c78c38f9f81a963b33d0eade559f6048add24a6d
2016-10-13upstream commitmarkus@openbsd.org
Unregister the KEXINIT handler after message has been received. Otherwise an unauthenticated peer can repeat the KEXINIT and cause allocation of up to 128MB -- until the connection is closed. Reported by shilei-c at 360.cn Upstream-ID: 43649ae12a27ef94290db16d1a98294588b75c05
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
2016-09-24upstream commitdjm@openbsd.org
support plain curve25519-sha256 KEX algorithm now that it is approaching standardisation (same algorithm is currently supported as curve25519-sha256@libssh.org) Upstream-ID: 5e2b6db2e72667048cf426da43c0ee3fc777baa2
2016-09-22upstream commitdjm@openbsd.org
correctly return errors from kex_send_ext_info(). Fix from Sami Farin via https://github.com/openssh/openssh-portable/pull/50 Upstream-ID: c85999af28aaecbf92cfa2283381df81e839b42c
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
2016-09-13upstream commitdjm@openbsd.org
list all supported signature algorithms in the server-sig-algs Reported by mb AT smartftp.com in bz#2547 and (independantly) Ron Frederick; ok markus@ Upstream-ID: ddf702d721f54646b11ef2cee6d916666cb685cd
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
update ext_info_c every time we receive a kexinit msg; fixes sending of ext_info if privsep is disabled; report Aris Adamantiadis & Mancha; ok djm@ Upstream-ID: 2ceaa1076e19dbd3542254b4fb8e42d608f28856
2016-07-15missing openssl/dh.hDamien Miller
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
2016-02-08upstream 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
2016-01-27upstream commitmarkus@openbsd.org
remove roaming support; ok djm@ Upstream-ID: 2cab8f4b197bc95776fb1c8dc2859dad0c64dc56
2015-12-18upstream commitdjm@openbsd.org
unbreak connections with peers that set first_kex_follows; fix from Matt Johnston va bz#2515 Upstream-ID: decc88ec4fc7515594fdb42b04aa03189a44184b
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
2015-11-16upstream commitdjm@openbsd.org
send SSH2_MSG_UNIMPLEMENTED replies to unexpected messages during KEX; bz#2949, ok dtucker@ Upstream-ID: 2b3abdff344d53c8d505f45c83a7b12e84935786
2015-10-14upstream commitdjm@openbsd.org
free the correct IV length, don't assume it's always the cipher blocksize; ok dtucker@ Upstream-ID: c260d9e5ec73628d9ff4b067fbb060eff5a7d298
2015-08-22upstream commitdjm@openbsd.org
Improve printing of KEX offers and decisions The debug output now labels the client and server offers and the negotiated options. ok markus@ Upstream-ID: 8db921b3f92a4565271b1c1fbce6e7f508e1a2cb
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
2015-07-29upstream commitdjm@openbsd.org
fix bug in previous; was printing incorrect string for failed host key algorithms negotiation Upstream-ID: 22c0dc6bc61930513065d92e11f0753adc4c6e6e
2015-07-29upstream commitdjm@openbsd.org
include the peer's offer when logging a failure to negotiate a mutual set of algorithms (kex, pubkey, ciphers, etc.) ok markus@ Upstream-ID: bbb8caabf5c01790bb845f5ce135565248d7c796
2015-04-29upstream commitdjm@openbsd.org
don't try to cleanup NULL KEX proposals in kex_prop_free(); found by Jukka Taimisto and Markus Hietava
2015-03-11make unit tests work for !OPENSSH_HAS_ECCDamien Miller
2015-01-30upstream commitdjm@openbsd.org
fix ssh protocol 1, spotted by miod@
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@
2015-01-26upstream 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@
2015-01-15support --without-openssl at configure timeDamien Miller
Disables and removes dependency on OpenSSL. Many features don't work and the set of crypto options is greatly restricted. This will only work on system with native arc4random or /dev/urandom. Considered highly experimental for now.
2014-10-12remove duplicated KEX_DH1 entryDamien Miller
2014-05-15 - markus@cvs.openbsd.org 2014/04/29 18:01:49Damien Miller
[auth.c authfd.c authfile.c bufaux.c cipher.c cipher.h hostfile.c] [kex.c key.c mac.c monitor.c monitor_wrap.c myproposal.h packet.c] [roaming_client.c ssh-agent.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c] [ssh-pkcs11.h ssh.c sshconnect.c sshconnect2.c sshd.c] make compiling against OpenSSL optional (make OPENSSL=no); reduces algorithms to curve25519, aes-ctr, chacha, ed25519; allows us to explore further options; with and ok djm
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