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path: root/auth2.c
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2020-10-18Handle SELinux authorisation rolesManoj Srivastava
Rejected upstream due to discomfort with magic usernames; a better approach will need an SSH protocol change. In the meantime, this came from Debian's SELinux maintainer, so we'll keep it until we have something better. Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1641 Bug-Debian: http://bugs.debian.org/394795 Last-Update: 2020-10-18 Patch-Name: selinux-role.patch
2020-10-18GSSAPI key exchange supportSimon Wilkinson
This patch has been rejected upstream: "None of the OpenSSH developers are in favour of adding this, and this situation has not changed for several years. This is not a slight on Simon's patch, which is of fine quality, but just that a) we don't trust GSSAPI implementations that much and b) we don't like adding new KEX since they are pre-auth attack surface. This one is particularly scary, since it requires hooks out to typically root-owned system resources." However, quite a lot of people rely on this in Debian, and it's better to have it merged into the main openssh package rather than having separate -krb5 packages (as we used to have). It seems to have a generally good security history. Author: Simon Wilkinson <simon@sxw.org.uk> Author: Colin Watson <cjwatson@debian.org> Author: Jakub Jelen <jjelen@redhat.com> Origin: other, https://github.com/openssh-gsskex/openssh-gsskex/commits/debian/master Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1242 Last-Updated: 2020-06-07 Patch-Name: gssapi.patch
2020-08-07Always send any PAM account messages.Darren Tucker
If the PAM account stack reaturns any messages, send them to the user not just if the check succeeds. bz#2049, ok djm@
2020-03-13upstream: exit on parse failures in input_service_request; ok djmmarkus@openbsd.org
OpenBSD-Commit-ID: 6a7e1bfded26051d5aa893c030229b1ee6a0d5d2
2019-10-02remove duplicate #includesDamien Miller
Prompted by Jakub Jelen
2019-09-06upstream: lots of things were relying on libcrypto headers todjm@openbsd.org
transitively include various system headers (mostly stdlib.h); include them explicitly OpenBSD-Commit-ID: 5b522f4f2d844f78bf1cc4f3f4cc392e177b2080
2019-07-02upstream: asprintf returns -1, not an arbitrary value < 0. Alsoderaadt@openbsd.org
upon error the (very sloppy specification) leaves an undefined value in *ret, so it is wrong to inspect it, the error condition is enough. discussed a little with nicm, and then much more with millert until we were exasperated OpenBSD-Commit-ID: 29258fa51edf8115d244b9d4b84028487bf8923e
2019-03-26upstream: Fix authentication failures when "AuthenticationMethodsdjm@openbsd.org
any" in a Match block overrides a more restrictive global default. Spotted by jmc@, ok markus@ OpenBSD-Commit-ID: a90a4fe2ab81d0eeeb8fdfc21af81f7eabda6666
2019-01-20last bits of old packet API / active_state globalDamien Miller
2019-01-20remove PAM dependencies on old packet APIDamien Miller
Requires some caching of values, because the PAM code isn't always called with packet context.
2019-01-20remove vestiges of old packet API from loginrec.cDamien Miller
2019-01-20upstream: convert auth.c to new packet APIdjm@openbsd.org
with & ok markus@ OpenBSD-Commit-ID: 7e10359f614ff522b52a3f05eec576257794e8e4
2019-01-20upstream: convert auth2.c to new packet APIDamien Miller
OpenBSD-Commit-ID: ed831bb95ad228c6791bc18b60ce7a2edef2c999
2019-01-20upstream: begin landing remaining refactoring of packet parsingdjm@openbsd.org
API, started almost exactly six years ago. This change stops including the old packet_* API by default and makes each file that requires the old API include it explicitly. We will commit file-by-file refactoring to remove the old API in consistent steps. with & ok markus@ OpenBSD-Commit-ID: 93c98a6b38f6911fd1ae025a1ec57807fb4d4ef4
2019-01-17upstream: include time.h for time(3)/nanosleep(2); from Iandjm@openbsd.org
McKellar OpenBSD-Commit-ID: 6412ccd06a88f65b207a1089345f51fa1244ea51
2018-09-13upstream: hold our collective noses and use the openssl-1.1.x API indjm@openbsd.org
OpenSSH; feedback and ok tb@ jsing@ markus@ OpenBSD-Commit-ID: cacbcac87ce5da0d3ca7ef1b38a6f7fb349e4417
2018-07-12upstream: remove legacy key emulation layer; ok djm@markus@openbsd.org
OpenBSD-Commit-ID: 2b1f9619259e222bbd4fe9a8d3a0973eafb9dd8d
2018-07-10Adapt portable to legacy buffer API removalDamien Miller
2018-07-10upstream: sshd: switch authentication to sshbuf API; ok djm@markus@openbsd.org
OpenBSD-Commit-ID: 880aa06bce4b140781e836bb56bec34873290641
2018-05-11upstream: Explicit cast when snprintf'ing an uint64. Preventsdtucker@openbsd.org
warnings on platforms where int64 is long not long long. ok djm@ OpenBSD-Commit-ID: 9c5359e2fbfce11dea2d93f7bc257e84419bd001
2018-04-13upstream: Defend against user enumeration timing attacks. Thisdtucker@openbsd.org
establishes a minimum time for each failed authentication attempt (5ms) and adds a per-user constant derived from a host secret (0-4ms). Based on work by joona.kannisto at tut.fi, ok markus@ djm@. OpenBSD-Commit-ID: b7845b355bb7381703339c8fb0e57e81a20ae5ca
2018-03-03upstream: switch over to the new authorized_keys options API anddjm@openbsd.org
remove the legacy one. Includes a fairly big refactor of auth2-pubkey.c to retain less state between key file lines. feedback and ok markus@ OpenBSD-Commit-ID: dece6cae0f47751b9892080eb13d6625599573df
2018-02-15Remove UNICOS support.Darren Tucker
The code required to support it is quite invasive to the mainline code that is synced with upstream and is an ongoing maintenance burden. Both the hardware and software are literal museum pieces these days and we could not find anyone still running OpenSSH on one.
2018-01-23one SSH_BUG_BANNER instance that got awayDamien Miller
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
2017-06-24upstream commitdjm@openbsd.org
refactor authentication logging optionally record successful auth methods and public credentials used in a file accessible to user sessions feedback and ok markus@ Upstream-ID: 090b93036967015717b9a54fd0467875ae9d32fb
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
use the ssh_dispatch_run_fatal variant Upstream-ID: 28c5b364e37c755d1b22652b8cd6735a05c625d8
2017-05-31upstream commitmarkus@openbsd.org
switch auth2 to ssh_dispatch API; ok djm@ Upstream-ID: a752ca19e2782900dd83060b5c6344008106215f
2017-05-31upstream commitmarkus@openbsd.org
protocol handlers all get struct ssh passed; ok djm@ Upstream-ID: 0ca9ea2a5d01a6d2ded94c5024456a930c5bfb5d
2017-05-31upstream commitmarkus@openbsd.org
sshd: pass struct ssh to auth functions; ok djm@ Upstream-ID: b00a80c3460884ebcdd14ef550154c761aebe488
2017-02-04upstream commitdjm@openbsd.org
use ssh_packet_set_log_preamble() to include connection username in packet log messages, e.g. Connection closed by invalid user foo 10.1.1.1 port 44056 [preauth] ok markus@ bz#113 Upstream-ID: 3591b88bdb5416d6066fb3d49d8fff2375bf1a15
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
2015-01-20upstream commitmarkus@openbsd.org
move dispatch to struct ssh; ok djm@
2014-12-22upstream commitdjm@openbsd.org
make internal handling of filename arguments of "none" more consistent with ssh. "none" arguments are now replaced with NULL when the configuration is finalised. Simplifies checking later on (just need to test not-NULL rather than that + strcmp) and cleans up some inconsistencies. ok markus@
2014-12-22upstream commitdjm@openbsd.org
don't count partial authentication success as a failure against MaxAuthTries; ok deraadt@
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@
2014-07-03 - djm@cvs.openbsd.org 2014/07/03 11:16:55Damien Miller
[auth.c auth.h auth1.c auth2.c] make the "Too many authentication failures" message include the user, source address, port and protocol in a format similar to the authentication success / failure messages; bz#2199, ok dtucker
2014-02-04 - djm@cvs.openbsd.org 2014/01/29 06:18:35Damien Miller
[Makefile.in auth.h auth2-jpake.c auth2.c jpake.c jpake.h monitor.c] [monitor.h monitor_wrap.c monitor_wrap.h readconf.c readconf.h] [schnorr.c schnorr.h servconf.c servconf.h ssh2.h sshconnect2.c] remove experimental, never-enabled JPAKE code; ok markus@
2013-06-02 - djm@cvs.openbsd.org 2013/05/19 02:42:42Darren Tucker
[auth.h auth.c key.c monitor.c auth-rsa.c auth2.c auth1.c key.h] Standardise logging of supplemental information during userauth. Keys and ruser is now logged in the auth success/failure message alongside the local username, remote host/port and protocol in use. Certificates contents and CA are logged too. Pushing all logging onto a single line simplifies log analysis as it is no longer necessary to relate information scattered across multiple log entries. "I like it" markus@
2013-06-02 - djm@cvs.openbsd.org 2013/05/17 00:13:13Darren Tucker
[xmalloc.h cipher.c sftp-glob.c ssh-keyscan.c ssh.c sftp-common.c ssh-ecdsa.c auth2-chall.c compat.c readconf.c kexgexs.c monitor.c gss-genr.c cipher-3des1.c kex.c monitor_wrap.c ssh-pkcs11-client.c auth-options.c rsa.c auth2-pubkey.c sftp.c hostfile.c auth2.c servconf.c auth.c authfile.c xmalloc.c uuencode.c sftp-client.c auth2-gss.c sftp-server.c bufaux.c mac.c session.c jpake.c kexgexc.c sshconnect.c auth-chall.c auth2-passwd.c sshconnect1.c buffer.c kexecdhs.c kexdhs.c ssh-rsa.c auth1.c ssh-pkcs11.c auth2-kbdint.c kexdhc.c sshd.c umac.c ssh-dss.c auth2-jpake.c bufbn.c clientloop.c monitor_mm.c scp.c roaming_client.c serverloop.c key.c auth-rsa.c ssh-pkcs11-helper.c ssh-keysign.c ssh-keygen.c match.c channels.c sshconnect2.c addrmatch.c mux.c canohost.c kexecdhc.c schnorr.c ssh-add.c misc.c auth2-hostbased.c ssh-agent.c bufec.c groupaccess.c dns.c packet.c readpass.c authfd.c moduli.c] bye, bye xfree(); ok markus@
2013-04-23 - markus@cvs.openbsd.org 2013/03/07 19:27:25Damien Miller
[auth.h auth2-chall.c auth2.c monitor.c sshd_config.5] add submethod support to AuthenticationMethods; ok and freedback djm@
2012-12-03 - djm@cvs.openbsd.org 2012/12/02 20:34:10Damien Miller
[auth.c auth.h auth1.c auth2-chall.c auth2-gss.c auth2-jpake.c auth2.c] [monitor.c monitor.h] Fixes logging of partial authentication when privsep is enabled Previously, we recorded "Failed xxx" since we reset authenticated before calling auth_log() in auth2.c. This adds an explcit "Partial" state. Add a "submethod" to auth_log() to report which submethod is used for keyboard-interactive. Fix multiple authentication when one of the methods is keyboard-interactive. ok markus@
2012-11-04 - djm@cvs.openbsd.org 2012/11/04 11:09:15Damien Miller
[auth.h auth1.c auth2.c monitor.c servconf.c servconf.h sshd.c] [sshd_config.5] Support multiple required authentication via an AuthenticationMethods option. This option lists one or more comma-separated lists of authentication method names. Successful completion of all the methods in any list is required for authentication to complete; feedback and ok markus@
2011-12-19 - djm@cvs.openbsd.org 2011/12/07 05:44:38Damien Miller
[auth2.c dh.c packet.c roaming.h roaming_client.c roaming_common.c] fix some harmless and/or unreachable int overflows; reported Xi Wang, ok markus@
2011-05-05 - OpenBSD CVS SyncDamien Miller
- djm@cvs.openbsd.org 2011/03/10 02:52:57 [auth2-gss.c auth2.c] allow GSSAPI authentication to detect when a server-side failure causes authentication failure and don't count such failures against MaxAuthTries; bz#1244 from simon AT sxw.org.uk; ok markus@ before lock
2010-08-31 - djm@cvs.openbsd.org 2010/08/31 09:58:37Damien Miller
[auth-options.c auth1.c auth2.c bufaux.c buffer.h kex.c key.c packet.c] [packet.h ssh-dss.c ssh-rsa.c] Add buffer_get_cstring() and related functions that verify that the string extracted from the buffer contains no embedded \0 characters* This prevents random (possibly malicious) crap from being appended to strings where it would not be noticed if the string is used with a string(3) function. Use the new API in a few sensitive places. * actually, we allow a single one at the end of the string for now because we don't know how many deployed implementations get this wrong, but don't count on this to remain indefinitely.
2009-06-22 - dtucker@cvs.openbsd.org 2009/06/22 05:39:28Darren Tucker
[monitor_wrap.c monitor_mm.c ssh-keygen.c auth2.c gss-genr.c sftp-client.c] alphabetize includes; reduces diff vs portable and style(9). ok stevesk djm (Id sync only; these were already in order in -portable)
2009-06-21 - (dtucker) [auth2-jpake.c auth2.c canohost.h session.c] Whitespace andDarren Tucker
header-order changes to reduce diff vs OpenBSD.
2008-11-05 - djm@cvs.openbsd.org 2008/11/04 08:22:13Damien Miller
[auth.h auth2.c monitor.c monitor.h monitor_wrap.c monitor_wrap.h] [readconf.c readconf.h servconf.c servconf.h ssh2.h ssh_config.5] [sshconnect2.c sshd_config.5 jpake.c jpake.h schnorr.c auth2-jpake.c] [Makefile.in] Add support for an experimental zero-knowledge password authentication method using the J-PAKE protocol described in F. Hao, P. Ryan, "Password Authenticated Key Exchange by Juggling", 16th Workshop on Security Protocols, Cambridge, April 2008. This method allows password-based authentication without exposing the password to the server. Instead, the client and server exchange cryptographic proofs to demonstrate of knowledge of the password while revealing nothing useful to an attacker or compromised endpoint. This is experimental, work-in-progress code and is presently compiled-time disabled (turn on -DJPAKE in Makefile.inc). "just commit it. It isn't too intrusive." deraadt@
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