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156 Commits

Author SHA1 Message Date
Damien Miller 10358abd08 retry waitpid on EINTR failure 
patch from Jakub Jelen on bz#2581; ok dtucker@
 2016-07-22 14:07:08 +10:00
Darren Tucker 01558b7b07 Handle PAM_MAXTRIES from modules. 
bz#2249: handle the case where PAM returns PAM_MAXTRIES by ceasing to offer
password and keyboard-interative authentication methods.  Should prevent
"sshd ignoring max retries" warnings in the log.  ok djm@

It probably won't trigger with keyboard-interactive in the default
configuration because the retry counter is stored in module-private
storage which goes away with the sshd PAM process (see bz#688).  On the
other hand, those cases probably won't log a warning either.
 2016-07-18 09:33:25 +10:00
Darren Tucker 283b97ff33 Mitigate timing of disallowed users PAM logins. 
When sshd decides to not allow a login (eg PermitRootLogin=no) and
it's using PAM, it sends a fake password to PAM so that the timing for
the failure is not noticeably different whether or not the password
is correct.  This behaviour can be detected by sending a very long
password string which is slower to hash than the fake password.

Mitigate by constructing an invalid password that is the same length
as the one from the client and thus takes the same time to hash.
Diff from djm@
 2016-07-15 13:49:44 +10:00
Darren Tucker 009891afc8 Remove duplicate code from PAM. ok djm@ 2016-06-17 14:34:09 +10:00
Darren Tucker 39c0cecaa1 Fix comment about sshpam_const and AIX. 
From mschwager via github.
 2016-05-20 10:01:58 +10:00
Damien Miller 3ed9218c33 unbreak PAM after canohost refactor 2016-03-08 14:01:29 -08:00
Damien Miller 5ef4b0fdcc avoid FreeBSD RCS Id in comment 
Change old $FreeBSD version string in comment so it doesn't
become an RCS ident downstream; requested by des AT des.no
 2016-02-05 10:45:23 +11:00
Darren Tucker d1680d36e1 xrealloc -> xreallocarray in portable code too. 2015-04-30 09:18:11 +10:00
Darren Tucker 53f8e784dc - (dtucker) [auth-pam.c] bz#2163: check return value from pam_get_item(). 
Patch from Loganaden Velvindron.
 2013-12-19 11:31:44 +11:00
Darren Tucker f60845fde2 - (dtucker) [M auth-chall.c auth-krb5.c auth-pam.c cipher-aes.c cipher-ctr.c 
groupaccess.c loginrec.c monitor.c monitor_wrap.c session.c sshd.c
   sshlogin.c uidswap.c openbsd-compat/bsd-cygwin_util.c
   openbsd-compat/getrrsetbyname-ldns.c openbsd-compat/port-aix.c
   openbsd-compat/port-linux.c] Replace portable-specific instances of xfree
   with the equivalent calls to free.
 2013-06-02 08:07:31 +10:00
Darren Tucker 622d5c561b - (dtucker) [auth-pam.c] Bug #1534: move the deletion of PAM credentials on 
logout to after the session close.  Patch from Anicka Bernathova, ok djm.
 2009-07-12 22:07:21 +10:00
Darren Tucker 52358d6df3 - (dtucker) [auth-pam.c monitor.c session.c sshd.c] Bug #926: Move 
pam_open_session and pam_close_session into the privsep monitor, which
   will ensure that pam_session_close is called as root.  Patch from Tomas
   Mraz.
 2008-03-11 22:58:25 +11:00
Darren Tucker 57d4ca9681 - (dtucker) [auth-pam.c] Use sigdie here too. ok djm@ 2007-08-10 14:32:34 +10:00
Darren Tucker 2216471510 - (dtucker) [auth-pam.c] Return empty string if fgets fails in 
sshpam_tty_conv.  Patch from ldv at altlinux.org.
 2007-05-20 15:26:07 +10:00
Darren Tucker 29171e9f5c - (dtucker) [auth-pam.c] malloc+memset -> calloc. Patch from 
ldv at altlinux.org.
 2007-05-20 15:20:08 +10:00
Darren Tucker 54e1b2291c - (dtucker) [auth-pam.c] Propogate TZ environment variable to PAM auth 
process so that any logging it does is with the right timezone.  From
   Scott Strickler, ok djm@.
 2006-09-17 11:57:46 +10:00
Damien Miller ded319cca2 - (djm) [audit-bsm.c audit.c auth-bsdauth.c auth-chall.c auth-pam.c] 
[auth-rsa.c auth-shadow.c auth-sia.c auth1.c auth2-chall.c]
   [auth2-gss.c auth2-kbdint.c auth2-none.c authfd.c authfile.c]
   [cipher-3des1.c cipher-aes.c cipher-bf1.c cipher-ctr.c clientloop.c]
   [dh.c dns.c entropy.c gss-serv-krb5.c gss-serv.c hostfile.c kex.c]
   [kexdhc.c kexdhs.c kexgexc.c kexgexs.c key.c loginrec.c mac.c]
   [md5crypt.c monitor.c monitor_wrap.c readconf.c rsa.c]
   [scard-opensc.c scard.c session.c ssh-add.c ssh-agent.c ssh-dss.c]
   [ssh-keygen.c ssh-keysign.c ssh-rsa.c ssh.c sshconnect.c]
   [sshconnect1.c sshconnect2.c sshd.c rc4.diff]
   [openbsd-compat/bsd-cray.c openbsd-compat/port-aix.c]
   [openbsd-compat/port-linux.c openbsd-compat/port-solaris.c]
   [openbsd-compat/port-uw.c]
   Lots of headers for SCO OSR6, mainly adding stdarg.h for log.h;
   compile problems reported by rac AT tenzing.org
 2006-09-01 15:38:36 +10:00
Damien Miller 75bb664458 - (djm) [auth-pam.c auth-shadow.c auth2-none.c cleanup.c sshd.c] 
[openbsd-compat/port-tun.c openbsd-compat/port-tun.h] Sprinkle more
   includes for Linux in
 2006-08-05 14:07:20 +10:00
Damien Miller 4cbfe8ebeb - (djm) [auth-pam.c auth.c bufaux.h entropy.c openbsd-compat/port-tun.c] 
remove last traces of bufaux.h - it was merged into buffer.h in the big
   includes.h commit
 2006-08-05 12:49:30 +10:00
Damien Miller 2ab323e0bd - (djm) [auth-pam.c defines.h] Move PAM related bits to auth-pam.c 2006-08-05 12:43:32 +10:00
Damien Miller b8fe89c4d9 - (djm) [acss.c auth-krb5.c auth-options.c auth-pam.c auth-shadow.c] 
[canohost.c channels.c cipher-acss.c defines.h dns.c gss-genr.c]
   [gss-serv-krb5.c gss-serv.c log.h loginrec.c logintest.c readconf.c]
   [servconf.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c ssh-rand-helper.c]
   [ssh.c sshconnect.c sshd.c openbsd-compat/bindresvport.c]
   [openbsd-compat/bsd-arc4random.c openbsd-compat/bsd-misc.c]
   [openbsd-compat/getrrsetbyname.c openbsd-compat/glob.c]
   [openbsd-compat/mktemp.c openbsd-compat/port-linux.c]
   [openbsd-compat/port-tun.c openbsd-compat/readpassphrase.c]
   [openbsd-compat/setproctitle.c openbsd-compat/xmmap.c]
   make the portable tree compile again - sprinkle unistd.h and string.h
   back in. Don't redefine __unused, as it turned out to be used in
   headers on Linux, and replace its use in auth-pam.c with ARGSUSED
 2006-07-24 14:51:00 +10:00
Darren Tucker 341dae59c8 - (dtucker) [auth-krb5.c auth-pam.c] Still more errno.h 2006-07-13 08:45:14 +10:00
Darren Tucker 2c77b7f1c1 - (dtucker) [auth-pam.c] Bug #1188: pass result of do_pam_account back and 
do not allow kbdint again after the PAM account check fails.  ok djm@
 2006-05-15 17:22:33 +10:00
Darren Tucker d8093e49bf - (dtucker) [auth-pam.c groupaccess.c monitor.c monitor_wrap.c scard-opensc.c 
session.c ssh-rand-helper.c sshd.c openbsd-compat/bsd-cygwin_util.c
   openbsd-compat/setproctitle.c] Convert malloc(foo*bar) -> calloc(foo,bar)
   in Portable-only code; since calloc zeros, remove now-redundant memsets.
   Also add a couple of sanity checks.  With & ok djm@
 2006-05-04 16:24:34 +10:00
Damien Miller 36812092ec - djm@cvs.openbsd.org 2006/03/25 01:13:23 
[buffer.c channels.c deattack.c misc.c scp.c session.c sftp-client.c]
     [sftp-server.c ssh-agent.c ssh-rsa.c xmalloc.c xmalloc.h auth-pam.c]
     [uidswap.c]
     change OpenSSH's xrealloc() function from being xrealloc(p, new_size)
     to xrealloc(p, new_nmemb, new_itemsize).

     realloc is particularly prone to integer overflows because it is
     almost always allocating "n * size" bytes, so this is a far safer
     API; ok deraadt@
 2006-03-26 14:22:47 +11:00
Damien Miller b0fb6872ed - deraadt@cvs.openbsd.org 2006/03/19 18:51:18 
[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
 2006-03-26 00:03:21 +11:00
Damien Miller 66f9eb65ff - (djm) [auth-pam.c] Fix memleak in error path, from Coverity via 
elad AT NetBSD.org
 2006-03-18 23:04:49 +11:00
Damien Miller 6645e7a70d - (djm) [auth-pam.c clientloop.c includes.h monitor.c session.c] 
[sftp-client.c ssh-keysign.c ssh.c sshconnect.c sshconnect2.c]
   [sshd.c openbsd-compat/bsd-misc.c openbsd-compat/bsd-openpty.c]
   [openbsd-compat/glob.c openbsd-compat/mktemp.c]
   [openbsd-compat/readpassphrase.c] Lots of include fixes for
   OpenSolaris
 2006-03-15 14:42:54 +11:00
Darren Tucker 1d4ebbf143 Correct format in debug message 2006-01-29 16:46:13 +11:00
Darren Tucker 7b1e695846 - (dtucker) [auth-pam.c] Bug #1028: send final non-query messages from 
PAM via keyboard-interactive.  Patch tested by the folks at Vintela.
 2005-09-28 22:33:27 +10:00
Damien Miller 37294fb630 - (djm) [auth-pam.c sftp.c] spaces vs. tabs at start of line 2005-07-17 17:18:49 +10:00
Damien Miller 94cf4c8448 - (djm) [acss.c auth-pam.c auth-shadow.c auth-skey.c auth1.c canohost.c] 
[cipher-acss.c loginrec.c ssh-rand-helper.c sshd.c] Fix whitespace at EOL
   in portable too ("perl -p -i -e 's/\s+$/\n/' *.[ch]")
 2005-07-17 17:04:47 +10:00
Darren Tucker 4f1adad4f6 - (dtucker) [auth-pam.c] Ensure that only one side of the authentication 
socketpair stays open on in both the monitor and PAM process.  Patch from
   Joerg Sonnenberger.
 2005-07-16 11:33:06 +10:00
Darren Tucker f08bdb5a7e - (dtucker) [auth-pam.c] Bug #1033: Fix warnings building with PAM on Linux: 
warning: dereferencing type-punned pointer will break strict-aliasing rules
  warning: passing arg 3 of `pam_get_item' from incompatible pointer type
  The type-punned pointer fix is based on a patch from SuSE's rpm.  ok djm@
 2005-05-26 19:59:48 +10:00
Darren Tucker 328118aa79 - (dtucker) [auth-pam.c] Since people don't seem to be getting the message 
that USE_POSIX_THREADS is unsupported, not recommended and generally a bad
   idea, it is now known as UNSUPPORTED_POSIX_THREADS_HACK.  Attempting to use
   USE_POSIX_THREADS will now generate an error so we don't silently change
   behaviour.  ok djm@
 2005-05-25 16:18:09 +10:00
Darren Tucker d5bfa8f9d8 Oops, did not intend to commit this yet 2005-01-20 13:29:51 +11:00
Darren Tucker d231186fd0 - djm@cvs.openbsd.org 2004/12/22 02:13:19 
[cipher-ctr.c cipher.c]
     remove fallback AES support for old OpenSSL, as OpenBSD has had it for
     many years now; ok deraadt@
     (Id sync only: Portable will continue to support older OpenSSLs)
 2005-01-20 13:27:56 +11:00
Darren Tucker 36a3d60347 - (dtucker) [auth-pam.c] Bug #971: Prevent leaking information about user 
existence via keyboard-interactive/pam, in conjunction with previous
   auth2-chall.c change; with Colin Watson and djm.
 2005-01-20 12:43:38 +11:00
Damien Miller daffc6a115 - (djm) [auth-pam.c] snprintf->strl*, fix server message length calculations 2004-10-16 18:52:44 +10:00
Darren Tucker 77fc29eeb3 - (dtucker) [auth-pam.c auth.h auth2-none.c auth2.c monitor.c monitor_wrap.c] 
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@
 2004-09-11 23:07:03 +10:00
Darren Tucker 0a7e3c6c89 - (dtucker) [auth-pam.c] Relocate sshpam_store_conv(), no code change. 2004-09-11 22:28:01 +10:00
Darren Tucker 69687f4b65 - (dtucker) [auth-pam.c auth-pam.h session.c] Bug #890: Send output from 
failing PAM session modules to user then exit, similar to the way
   /etc/nologin is handled.  ok djm@
 2004-09-11 22:17:26 +10:00
Darren Tucker 21dd0897d5 - (dtucker) [acconfig.h auth-pam.c configure.ac] Set real uid to non-root 
to convince Solaris PAM to honour password complexity rules.  ok djm@
 2004-08-16 23:12:05 +10:00
Damien Miller 2d2ed3d633 - (djm) [auth-pam.c] Portable parts of bz#899: Don't display invalid 
usernames in setproctitle from peak AT argo.troja.mff.cuni.cz;
 2004-07-21 20:54:47 +10:00
Damien Miller a6fb77fd6c - (djm) [auth-pam.c] Avoid use of xstrdup and friends in conversation function, 
instead return PAM_CONV_ERR, avoiding another path to fatal(); ok dtucker@
 2004-07-19 09:39:11 +10:00
Darren Tucker 5d423f4ece - (dtucker) [auth-pam.c] Check for zero from waitpid() too, which allows 
the monitor to properly clean up the PAM thread (Debian bug #252676).
 2004-07-11 16:54:08 +10:00
Darren Tucker 1f7e40864f - (dtucker) [auth-pam.c] Bug #559 (last piece): Pass DISALLOW_NULL_AUTHTOK 
to pam_authenticate for challenge-response auth too.  Originally from
   fcusack at fcusack.com, ok djm@
 2004-07-01 14:00:14 +10:00
Darren Tucker e2ba9c2e83 - (dtucker) [auth-pam.c] Bug #705: Make arguments match PAM specs, fixes 
warnings on compliant platforms.  From paul.a.bolton at bt.com.  ok djm@
 2004-07-01 12:38:14 +10:00
Darren Tucker 59e06026d7 - (dtucker) [auth-pam.c] Check for buggy PAM modules that return a NULL 
appdata_ptr to the conversation function.  ok djm@

By rights we should free the messages too, but if this happens then one
of the modules has already proven itself to be buggy so can we trust
the messages?
 2004-06-30 20:34:31 +10:00
Darren Tucker 17db1c47cf - (dtucker) [auth-pam.c] Don't use PAM namespace for 
pam_password_change_required either.
 2004-06-19 12:54:38 +10:00