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path: root/sshconnect2.c
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2016-12-05upstream commitdjm@openbsd.org
Fix public key authentication when multiple authentication is in use. Instead of deleting and re-preparing the entire keys list, just reset the 'used' flags; the keys list is already in a good order (with already- tried keys at the back) Analysis and patch from Vincent Brillault on bz#2642; ok dtucker@ Upstream-ID: 7123f12dc2f3bcaae715853035a97923d7300176
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
2016-09-24upstream commitdtucker@openbsd.org
If ssh receives a PACKET_DISCONNECT during userauth it will cause ssh_dispatch_run(DISPATCH_BLOCK, ...) to return without the session being authenticated. Check for this and exit if necessary. ok djm@ Upstream-ID: b3afe126c0839d2eae6cddd41ff2ba317eda0903
2016-07-23upstream commitdtucker@openbsd.org
Lower loglevel for "Authenticated with partial success" message similar to other similar level. bz#2599, patch from cgallek at gmail.com, ok markus@ Upstream-ID: 3faab814e947dc7b2e292edede23e94c608cb4dd
2016-07-17upstream commitdjm@openbsd.org
support UTF-8 characters in ssh(1) banners using schwarze@'s safe fmprintf printer; bz#2058 feedback schwarze@ ok dtucker@ Upstream-ID: a72ce4e3644c957643c9524eea2959e41b91eea7
2016-06-06upstream commitdtucker@openbsd.org
KNF compression proposal and simplify the client side a little. ok djm@ Upstream-ID: aa814b694efe9e5af8a26e4c80a05526ae6d6605
2016-06-06upstream commitdjm@openbsd.org
prefer agent-hosted keys to keys from PKCS#11; ok markus Upstream-ID: 7417f7653d58d6306d9f8c08d0263d050e2fd8f4
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
2016-04-29upstream commitdjm@openbsd.org
fix comment Upstream-ID: 313a385bd7b69a82f8e28ecbaf5789c774457b15
2016-03-15upstream commitdjm@openbsd.org
unbreak authentication using lone certificate keys in ssh-agent: when attempting pubkey auth with a certificate, if no separate private key is found among the keys then try with the certificate key itself. bz#2550 reported by Peter Moody Upstream-ID: f939cd76d68e6a9a3d1711b5a943d6ed1e623966
2016-02-23upstream commitdjm@openbsd.org
fix spurious error message when incorrect passphrase entered for keys; reported by espie@ ok deraadt@ Upstream-ID: 58b2e46e63ed6912ed1ee780bd3bd8560f9a5899
2016-02-08upstream commitjsg@openbsd.org
avoid an uninitialised value when NumberOfPasswordPrompts is 0 ok markus@ djm@ Upstream-ID: 11b068d83c2865343aeb46acf1e9eec00f829b6b
2016-01-27upstream commitmarkus@openbsd.org
fd leaks; report Qualys Security Advisory team; ok deraadt@ Upstream-ID: 4ec0f12b9d8fa202293c9effa115464185aa071d
2016-01-27upstream commitmarkus@openbsd.org
remove roaming support; ok djm@ Upstream-ID: 2cab8f4b197bc95776fb1c8dc2859dad0c64dc56
2015-12-18upstream commitmmcc@openbsd.org
Remove NULL-checks before sshkey_free(). ok djm@ Upstream-ID: 3e35afe8a25e021216696b5d6cde7f5d2e5e3f52
2015-12-11upstream commitdjm@openbsd.org
correct error messages; from Tomas Kuthan bz#2507 Upstream-ID: 7454a0affeab772398052954c79300aa82077093
2015-12-11upstream commitmmcc@openbsd.org
Pass (char *)NULL rather than (char *)0 to execl and execlp. ok dtucker@ Upstream-ID: 56c955106cbddba86c3dd9bbf786ac0d1b361492
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
2015-12-04upstream commitdjm@openbsd.org
clean up agent_fd handling; properly initialise it to -1 and make tests consistent ok markus@ Upstream-ID: ac9554323d5065745caf17b5e37cb0f0d4825707
2015-11-16upstream commitjcs@openbsd.org
Add an AddKeysToAgent client option which can be set to 'yes', 'no', 'ask', or 'confirm', and defaults to 'no'. When enabled, a private key that is used during authentication will be added to ssh-agent if it is running (with confirmation enabled if set to 'confirm'). Initial version from Joachim Schipper many years ago. ok markus@ Upstream-ID: a680db2248e8064ec55f8be72d539458c987d5f4
2015-10-14upstream commitdjm@openbsd.org
apply PubkeyAcceptedKeyTypes filtering earlier, so all skipped keys are noted before pubkey authentication starts. ok dtucker@ Upstream-ID: ba4f52f54268a421a2a5f98bb375403f4cb044b8
2015-10-06upstream commitdjm@openbsd.org
add ssh_config CertificateFile option to explicitly list a certificate; patch from Meghana Bhat on bz#2436; ok markus@ Upstream-ID: 58648ec53c510b41c1f46d8fe293aadc87229ab8
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
2015-07-15upstream 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
2015-05-10upstream 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@
2015-02-23Repair for non-ECC OpenSSL.Darren Tucker
Ifdef out the ECC parts when building with an OpenSSL that doesn't have it.
2015-01-30upstream commitdjm@openbsd.org
Add a ssh_config HostbasedKeyType option to control which host public key types are tried during hostbased authentication. This may be used to prevent too many keys being sent to the server, and blowing past its MaxAuthTries limit. bz#2211 based on patch by Iain Morgan; ok markus@
2015-01-29upstream commitdjm@openbsd.org
update to new API (key_fingerprint => sshkey_fingerprint) check sshkey_fingerprint return values; ok markus
2015-01-26upstream commitmarkus@openbsd.org
kex_setup errors are fatal()
2015-01-20upstream commitdjm@openbsd.org
make this compile with KERBEROS5 enabled
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@
2015-01-20upstream commitdjm@openbsd.org
avoid trailing ',' in host key algorithms
2015-01-15upstream commitdjm@openbsd.org
fix regression reported by brad@ for passworded keys without agent present
2015-01-15upstream commitdjm@openbsd.org
move authfd.c and its tentacles to the new buffer/key API; ok markus@
2015-01-09upstream commitdjm@openbsd.org
deprecate key_load_private_pem() and sshkey_load_private_pem() interfaces. Refactor the generic key loading API to not require pathnames to be specified (they weren't really used). Fixes a few other things en passant: Makes ed25519 keys work for hostbased authentication (ssh-keysign previously used the PEM-only routines). Fixes key comment regression bz#2306: key pathnames were being lost as comment fields. ok markus@
2014-12-22upstream commitdjm@openbsd.org
Add FingerprintHash option to control algorithm used for key fingerprints. Default changes from MD5 to SHA256 and format from hex to base64. Feedback and ok naddy@ markus@
2014-12-11upstream commitdjm@openbsd.org
show in debug output which hostkeys are being tried when attempting hostbased auth; patch from Iain Morgan
2014-07-18 - millert@cvs.openbsd.org 2014/07/15 15:54:14Damien Miller
[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@
2014-07-02 - djm@cvs.openbsd.org 2014/06/24 01:13:21Damien Miller
[Makefile.in auth-bsdauth.c auth-chall.c auth-options.c auth-rsa.c [auth2-none.c auth2-pubkey.c authfile.c authfile.h cipher-3des1.c [cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h [digest-libc.c digest-openssl.c digest.h dns.c entropy.c hmac.h [hostfile.c key.c key.h krl.c monitor.c packet.c rsa.c rsa.h [ssh-add.c ssh-agent.c ssh-dss.c ssh-ecdsa.c ssh-ed25519.c [ssh-keygen.c ssh-pkcs11-client.c ssh-pkcs11-helper.c ssh-pkcs11.c [ssh-rsa.c sshbuf-misc.c sshbuf.h sshconnect.c sshconnect1.c [sshconnect2.c sshd.c sshkey.c sshkey.h [openbsd-compat/openssl-compat.c openbsd-compat/openssl-compat.h] New key API: refactor key-related functions to be more library-like, existing API is offered as a set of wrappers. with and ok markus@ Thanks also to Ben Hawkes, David Tomaschik, Ivan Fratric, Matthew Dempsky and Ron Bowes for a detailed review a few months ago. NB. This commit also removes portable OpenSSH support for OpenSSL <0.9.8e.
2014-06-11 - djm@cvs.openbsd.org 2014/06/05 22:17:50Darren Tucker
[sshconnect2.c] fix inverted test that caused PKCS#11 keys that were explicitly listed not to be preferred. Reported by Dirk-Willem van Gulik
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
2014-04-20 - djm@cvs.openbsd.org 2014/04/18 23:52:25Damien Miller
[compat.c compat.h sshconnect2.c sshd.c version.h] OpenSSH 6.5 and 6.6 have a bug that causes ~0.2% of connections using the curve25519-sha256@libssh.org KEX exchange method to fail when connecting with something that implements the spec properly. Disable this KEX method when speaking to one of the affected versions. reported by Aris Adamantiadis; ok markus@
2014-04-20Three commits in one (since they touch the same heavily-diverged fileDamien Miller
repeatedly): - markus@cvs.openbsd.org 2014/03/25 09:40:03 [myproposal.h] trimm default proposals. This commit removes the weaker pre-SHA2 hashes, the broken ciphers (arcfour), and the broken modes (CBC) from the default configuration (the patch only changes the default, all the modes are still available for the config files). ok djm@, reminded by tedu@ & naddy@ and discussed with many - deraadt@cvs.openbsd.org 2014/03/26 17:16:26 [myproposal.h] The current sharing of myproposal[] between both client and server code makes the previous diff highly unpallatable. We want to go in that direction for the server, but not for the client. Sigh. Brought up by naddy. - markus@cvs.openbsd.org 2014/03/27 23:01:27 [myproposal.h ssh-keyscan.c sshconnect2.c sshd.c] disable weak proposals in sshd, but keep them in ssh; ok djm@
2014-02-04 - djm@cvs.openbsd.org 2014/02/02 03:44:32Damien Miller
[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()
2014-02-04 - tedu@cvs.openbsd.org 2014/01/31 16:39:19Damien Miller
[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