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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.
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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
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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
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remove now obsolete ctx from ssh_dispatch_run; ok djm@
Upstream-ID: 9870aabf7f4d71660c31fda91b942b19a8e68d29
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use the ssh_dispatch_run_fatal variant
Upstream-ID: 28c5b364e37c755d1b22652b8cd6735a05c625d8
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switch auth2 to ssh_dispatch API; ok djm@
Upstream-ID: a752ca19e2782900dd83060b5c6344008106215f
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protocol handlers all get struct ssh passed; ok djm@
Upstream-ID: 0ca9ea2a5d01a6d2ded94c5024456a930c5bfb5d
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sshd: pass struct ssh to auth functions; ok djm@
Upstream-ID: b00a80c3460884ebcdd14ef550154c761aebe488
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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
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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
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move dispatch to struct ssh; ok djm@
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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@
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don't count partial authentication success as a failure
against MaxAuthTries; ok deraadt@
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[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@
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[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
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[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@
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[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@
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[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@
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[auth.h auth2-chall.c auth2.c monitor.c sshd_config.5]
add submethod support to AuthenticationMethods; ok and freedback djm@
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[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@
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[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@
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[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@
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- 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
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[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.
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[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)
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header-order changes to reduce diff vs OpenBSD.
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[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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[auth1.c auth2.c]
Make protocol 1 MaxAuthTries logic match protocol 2's.
Do not treat the first protocol 2 authentication attempt as
a failure IFF it is for method "none".
Makes MaxAuthTries' user-visible behaviour identical for
protocol 1 vs 2.
ok dtucker@
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[auth2.c]
really really remove the freebie "none" auth try for protocol 2
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[auth2-none.c auth2.c]
Make protocol 2 MaxAuthTries behaviour a little more sensible:
Check whether client has exceeded MaxAuthTries before running
an authentication method and skip it if they have, previously it
would always allow one try (for "none" auth).
Preincrement failure count before post-auth test - previously this
checked and postincremented, also to allow one "none" try.
Together, these two changes always count the "none" auth method
which could be skipped by a malicious client (e.g. an SSH worm)
to get an extra attempt at a real auth method. They also make
MaxAuthTries=0 a useful way to block users entirely (esp. in a
sshd_config Match block).
Also, move sending of any preauth banner from "none" auth method
to the first call to input_userauth_request(), so worms that skip
the "none" method get to see it too.
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[auth2.c]
Remove unused prototype. ok djm@
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[auth2.c]
remove unused macro; from Dmitry V. Levin <ldv@altlinux.org>
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[auth2.c sshd_config.5 servconf.c]
Remove ChallengeResponseAuthentication support inside a Match
block as its interaction with KbdInteractive makes it difficult to
support. Also, relocate the CR/kbdint option special-case code into
servconf. "please commit" djm@, ok markus@ for the relocation.
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[OVERVIEW atomicio.c atomicio.h auth-bsdauth.c auth-chall.c auth-krb5.c]
[auth-options.c auth-options.h auth-passwd.c auth-rh-rsa.c auth-rhosts.c]
[auth-rsa.c auth-skey.c auth.c auth.h auth1.c auth2-chall.c auth2-gss.c]
[auth2-hostbased.c auth2-kbdint.c auth2-none.c auth2-passwd.c ]
[auth2-pubkey.c auth2.c authfd.c authfd.h authfile.c bufaux.c bufbn.c]
[buffer.c buffer.h canohost.c channels.c channels.h cipher-3des1.c]
[cipher-bf1.c cipher-ctr.c cipher.c cleanup.c clientloop.c compat.c]
[compress.c deattack.c dh.c dispatch.c dns.c dns.h fatal.c groupaccess.c]
[groupaccess.h gss-genr.c gss-serv-krb5.c gss-serv.c hostfile.c kex.c]
[kex.h kexdh.c kexdhc.c kexdhs.c kexgex.c kexgexc.c kexgexs.c key.c]
[key.h log.c log.h mac.c match.c md-sha256.c misc.c misc.h moduli.c]
[monitor.c monitor_fdpass.c monitor_mm.c monitor_mm.h monitor_wrap.c]
[monitor_wrap.h msg.c nchan.c packet.c progressmeter.c readconf.c]
[readconf.h readpass.c rsa.c scard.c scard.h scp.c servconf.c servconf.h]
[serverloop.c session.c session.h sftp-client.c sftp-common.c]
[sftp-common.h sftp-glob.c sftp-server.c sftp.c ssh-add.c ssh-agent.c]
[ssh-dss.c ssh-gss.h ssh-keygen.c ssh-keyscan.c ssh-keysign.c ssh-rsa.c]
[ssh.c ssh.h sshconnect.c sshconnect.h sshconnect1.c sshconnect2.c]
[sshd.c sshlogin.c sshlogin.h sshpty.c sshpty.h sshtty.c ttymodes.c]
[uidswap.c uidswap.h uuencode.c uuencode.h xmalloc.c xmalloc.h]
[loginrec.c loginrec.h openbsd-compat/port-aix.c openbsd-compat/port-tun.h]
almost entirely get rid of the culture of ".h files that include .h files"
ok djm, sort of ok stevesk
makes the pain stop in one easy step
NB. portable commit contains everything *except* removing includes.h, as
that will take a fair bit more work as we move headers that are required
for portability workarounds to defines.h. (also, this step wasn't "easy")
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[atomicio.c auth-options.c auth-passwd.c auth-rhosts.c auth-rsa.c]
[auth.c auth1.c auth2-chall.c auth2-hostbased.c auth2-passwd.c auth2.c]
[authfd.c authfile.c bufaux.c bufbn.c buffer.c canohost.c channels.c]
[cipher-3des1.c cipher-bf1.c cipher-ctr.c cipher.c clientloop.c]
[compat.c deattack.c dh.c dns.c gss-genr.c gss-serv.c hostfile.c]
[includes.h kex.c kexdhc.c kexdhs.c kexgexc.c kexgexs.c key.c log.c]
[mac.c match.c md-sha256.c misc.c moduli.c monitor.c monitor_fdpass.c]
[monitor_mm.c monitor_wrap.c msg.c nchan.c packet.c rsa.c]
[progressmeter.c readconf.c readpass.c scp.c servconf.c serverloop.c]
[session.c sftp-client.c sftp-common.c sftp-glob.c sftp-server.c sftp.c]
[ssh-add.c ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c]
[ssh-keysign.c ssh-rsa.c ssh.c sshconnect.c sshconnect1.c sshconnect2.c]
[sshd.c sshlogin.c sshpty.c ttymodes.c uidswap.c xmalloc.c]
move #include <string.h> out of includes.h
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[auth-options.c auth-options.h auth-passwd.c auth-rh-rsa.c]
[auth-rhosts.c auth-rsa.c auth.c auth.h auth2-hostbased.c]
[auth2-pubkey.c auth2.c includes.h misc.c misc.h monitor.c]
[monitor_wrap.c monitor_wrap.h scp.c serverloop.c session.c]
[session.h sftp-common.c ssh-add.c ssh-keygen.c ssh-keysign.c]
[ssh.c sshconnect.c sshconnect.h sshd.c sshpty.c sshpty.h uidswap.c]
[uidswap.h]
move #include <pwd.h> out of includes.h; ok markus@
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[atomicio.c auth-bsdauth.c auth-chall.c auth-options.c auth-passwd.c]
[auth-rh-rsa.c auth-rhosts.c auth-rsa.c auth-skey.c auth.c auth1.c]
[auth2-chall.c auth2-hostbased.c auth2-kbdint.c auth2-none.c]
[auth2-passwd.c auth2-pubkey.c auth2.c authfd.c authfile.c bufaux.c]
[buffer.c canohost.c channels.c cipher-3des1.c cipher-bf1.c]
[cipher-ctr.c cipher.c cleanup.c clientloop.c compat.c compress.c]
[deattack.c dh.c dispatch.c fatal.c groupaccess.c hostfile.c kex.c]
[kexdh.c kexdhc.c kexdhs.c kexgex.c kexgexc.c kexgexs.c key.c log.c]
[mac.c match.c md-sha256.c misc.c monitor.c monitor_fdpass.c]
[monitor_mm.c monitor_wrap.c msg.c nchan.c packet.c progressmeter.c]
[readconf.c readpass.c rsa.c scard.c scp.c servconf.c serverloop.c]
[session.c sftp-client.c sftp-common.c sftp-glob.c sftp-server.c]
[sftp.c ssh-add.c ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c]
[ssh-keysign.c ssh-rsa.c ssh.c sshconnect.c sshconnect1.c]
[sshconnect2.c sshd.c sshlogin.c sshpty.c sshtty.c ttymodes.c]
[uidswap.c uuencode.c xmalloc.c]
Put $OpenBSD$ tags back (as comments) to replace the RCSID()s that
Theo nuked - our scripts to sync -portable need them in the files
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[auth1.c auth2.c sshd.c]
sprinkle some ARGSUSED for table driven functions (which sometimes
must ignore their args)
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[atomicio.c auth-bsdauth.c auth-chall.c auth-krb5.c auth-options.c]
[auth-pam.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c]
[auth-shadow.c auth-skey.c auth.c auth1.c auth2-chall.c]
[auth2-hostbased.c auth2-kbdint.c auth2-none.c auth2-passwd.c]
[auth2-pubkey.c auth2.c authfd.c authfile.c bufaux.c buffer.c]
[canohost.c channels.c cipher-3des1.c cipher-acss.c cipher-aes.c]
[cipher-bf1.c cipher-ctr.c cipher.c cleanup.c clientloop.c compat.c]
[compress.c deattack.c dh.c dispatch.c dns.c entropy.c fatal.c]
[groupaccess.c hostfile.c includes.h kex.c kexdh.c kexdhc.c]
[kexdhs.c kexgex.c kexgexc.c kexgexs.c key.c log.c loginrec.c]
[loginrec.h logintest.c mac.c match.c md-sha256.c md5crypt.c misc.c]
[monitor.c monitor_fdpass.c monitor_mm.c monitor_wrap.c msg.c]
[nchan.c packet.c progressmeter.c readconf.c readpass.c rsa.c]
[scard.c scp.c servconf.c serverloop.c session.c sftp-client.c]
[sftp-common.c sftp-glob.c sftp-server.c sftp.c ssh-add.c]
[ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c]
[ssh-rand-helper.c ssh-rsa.c ssh.c sshconnect.c sshconnect1.c]
[sshconnect2.c sshd.c sshlogin.c sshpty.c sshtty.c ttymodes.c]
[uidswap.c uuencode.c xmalloc.c openbsd-compat/bsd-arc4random.c]
[openbsd-compat/bsd-closefrom.c openbsd-compat/bsd-cygwin_util.c]
[openbsd-compat/bsd-getpeereid.c openbsd-compat/bsd-misc.c]
[openbsd-compat/bsd-nextstep.c openbsd-compat/bsd-snprintf.c]
[openbsd-compat/bsd-waitpid.c openbsd-compat/fake-rfc2553.c]
RCSID() can die
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duplicate call. ok djm@
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[ssh-rand-helper.c] fix portable 2nd level indents at 4 spaces too
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monitor_wrap.c monitor_wrap.h session.c sshd.c]: Prepend all of the audit
defines and enums with SSH_ to prevent namespace collisions on some
platforms (eg AIX).
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monitor.h monitor_wrap.c monitor_wrap.h session.c sshd.c] Bug #125:
(first stage) Add audit instrumentation to sshd, currently disabled by
default. with suggestions from and djm@
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subsequently denied by the PAM auth stack, send the PAM message to the
user via packet_disconnect (Protocol 1) or userauth_banner (Protocol 2).
ok djm@
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Bug #892: Send messages from failing PAM account modules to the client via
SSH2_MSG_USERAUTH_BANNER messages. Note that this will not happen with
SSH2 kbdint authentication, which need to be dealt with separately. ok djm@
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[auth.c auth1.c auth2.c cipher.c cipher.h key.c session.c ssh.c
sshconnect1.c]
more s/illegal/invalid/
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[auth1.c auth2.c]
bz#899: Don't display invalid usernames in setproctitle
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[auth.c auth.h auth1.c auth2.c servconf.c servconf.h sshd_config sshd_config.5]
Add MaxAuthTries sshd config option; ok markus@
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monitor_wrap.h] Bug #808: Ensure force_pwchange is correctly initialized
even if keyboard-interactive is not used by the client. Prevents segfaults
in some cases where the user's password is expired (note this is not
considered a security exposure). ok djm@
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