add a sIgnore opcode that silently ignores options and
use it to suppress noisy deprecation warnings for the Protocol directive.
req henning, ok markus
Upstream-ID: 9fe040aca3d6ff393f6f7e60045cdd821dc4cbe0
remove UseLogin option and support for having /bin/login
manage login sessions; ok deraadt markus dtucker
Upstream-ID: bea7213fbf158efab7e602d9d844fba4837d2712
Remove more SSH1 server code: * Drop sshd's -k option. *
Retire configuration keywords that only apply to protocol 1, as well as the
"protocol" keyword. * Remove some related vestiges of protocol 1 support.
ok markus@
Upstream-ID: 9402f82886de917779db12f8ee3f03d4decc244d
fix AuthenticationMethods during configuration re-parse;
reported by Juan Francisco Cantero Hurtado
Upstream-ID: 8ffa1dac25c7577eca8238e825317ab20848f9b4
ban AuthenticationMethods="" and accept
AuthenticationMethods=any for the default behaviour of not requiring multiple
authentication
bz#2398 from Jakub Jelen; ok dtucker@
Upstream-ID: fabd7f44d59e4518d241d0d01e226435cc23cf27
Fix inverted logic for updating StreamLocalBindMask which
would cause the server to set an invalid mask. ok djm@
Upstream-ID: 8a4404c8307a5ef9e07ee2169fc6d8106b527587
fix overriding of StreamLocalBindMask and
StreamLocalBindUnlink in Match blocks; found the hard way Rogan Dawes
Upstream-ID: 940bc69ec0249ab428d24ccd0722ce35cb932ee2
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
refactor canohost.c: move functions that cache results closer
to the places that use them (authn and session code). After this, no state is
cached in canohost.c
feedback and ok markus@
Upstream-ID: 5f2e4df88d4803fc8ec59ec53629105e23ce625e
make sandboxed privilege separation the default, not just
for new installs; "absolutely" deraadt@
Upstream-ID: 5221ef3b927d2df044e9aa3f5db74ae91743f69b
Allow RekeyLimits in excess of 4G up to 2**63 bits
(limited by the return type of scan_scaled). Part of bz#2521, ok djm.
Upstream-ID: 13bea82be566b9704821b1ea05bf7804335c7979
Support "none" as an argument for sshd_config
ForceCommand and ChrootDirectory. Useful inside Match blocks to override a
global default. bz#2486 ok dtucker@
Upstream-ID: 7ef478d6592bc7db5c7376fc33b4443e63dccfa5
add prohibit-password as a synonymn for without-password,
since the without-password is causing too many questions. Harden it to ban
all but pubkey, hostbased, and GSSAPI auth (when the latter is enabled) from
djm, ok markus
Upstream-ID: d53317d7b28942153e6236d3fd6e12ceb482db7a
change default: PermitRootLogin without-password matching
install script changes coming as well ok djm markus
Upstream-ID: 0e2a6c4441daf5498b47a61767382bead5eb8ea6
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
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
add knob to relax GSSAPI host credential check for
multihomed hosts bz#928, patch by Simon Wilkinson; ok dtucker
(kerberos/GSSAPI is not compiled by default on OpenBSD)
Upstream-ID: 15ddf1c6f7fd9d98eea9962f480079ae3637285d
add AuthorizedPrincipalsCommand that allows getting
authorized_principals from a subprocess rather than a file, which is quite
useful in deployments with large userbases
feedback and ok markus@
Upstream-ID: aa1bdac7b16fc6d2fa3524ef08f04c7258d247f6
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@
a couple of parse targets were missing activep checks,
causing them to be misapplied in match context; bz#2272 diagnosis and
original patch from Sami Hartikainen ok dtucker@
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@
Two small fixes for sshd -T: ListenAddress'es are added
to a list head so reverse the order when printing them to ensure the
behaviour remains the same, and print StreamLocalBindMask as octal with
leading zero. ok deraadt@
Replace <sys/param.h> with <limits.h> and other less
dirty headers where possible. Annotate <sys/param.h> lines with their
current reasons. Switch to PATH_MAX, NGROUPS_MAX, HOST_NAME_MAX+1,
LOGIN_NAME_MAX, etc. Change MIN() and MAX() to local definitions of
MINIMUM() and MAXIMUM() where sensible to avoid pulling in the pollution.
These are the files confirmed through binary verification. ok guenther,
millert, doug (helped with the verification protocol)
add sshd_config HostbasedAcceptedKeyTypes and
PubkeyAcceptedKeyTypes options to allow sshd to control what public key types
will be accepted. Currently defaults to all. Feedback & ok markus@
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@
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@
[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@
[servconf.c servconf.h session.c sshd.8 sshd_config.5]
Add a sshd_config PermitUserRC option to control whether ~/.ssh/rc is
executed, mirroring the no-user-rc authorized_keys option;
bz#2160; ok markus@
[servconf.c servconf.h]
bz#2161 - fix AuthorizedKeysCommand inside a Match block and
rearrange things so the same error is harder to make next time;
with and ok dtucker@
[Makefile.in PROTOCOL PROTOCOL.chacha20poly1305 authfile.c chacha.c]
[chacha.h cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h]
[dh.c myproposal.h packet.c poly1305.c poly1305.h servconf.c ssh.1]
[ssh.c ssh_config.5 sshd_config.5] Add a new protocol 2 transport
cipher "chacha20-poly1305@openssh.com" that combines Daniel
Bernstein's ChaCha20 stream cipher and Poly1305 MAC to build an
authenticated encryption mode.
Inspired by and similar to Adam Langley's proposal for TLS:
http://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-03
but differs in layout used for the MAC calculation and the use of a
second ChaCha20 instance to separately encrypt packet lengths.
Details are in the PROTOCOL.chacha20poly1305 file.
Feedback markus@, naddy@; manpage bits Loganden Velvindron @ AfriNIC
ok markus@ naddy@
[cipher.c cipher.h kex.c kex.h mac.c mac.h servconf.c ssh.c]
Output the effective values of Ciphers, MACs and KexAlgorithms when
the default has not been overridden. ok markus@
[readconf.c servconf.c ssh_config.5 sshd_config.5]
Disallow empty Match statements and add "Match all" which matches
everything. ok djm, man page help jmc@
[auth.h kex.h kexdhs.c kexecdhs.c kexgexs.c monitor.c servconf.c]
[servconf.h session.c sshd.c sshd_config.5]
add ssh-agent(1) support to sshd(8); allows encrypted hostkeys,
or hostkeys on smartcards; most of the work by Zev Weiss; bz #1974
ok djm@
[sshd_config.5 servconf.c servconf.h packet.c serverloop.c monitor.c sshd_config
sshd.c] Add RekeyLimit to sshd with the same syntax as the client allowing
rekeying based on traffic volume or time. ok djm@, help & ok jmc@ for the man
page.
[servconf.c sshd_config sshd_config.5]
Change default of MaxStartups to 10:30:100 to start doing random early
drop at 10 connections up to 100 connections. This will make it harder
to DoS as CPUs have come a long way since the original value was set
back in 2000. Prompted by nion at debian org, ok markus@
[auth-options.c channels.c servconf.c servconf.h serverloop.c session.c]
[sshd_config.5]
make AllowTcpForwarding accept "local" and "remote" in addition to its
current "yes"/"no" to allow the server to specify whether just local or
remote TCP forwarding is enabled. ok markus@
[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@
[auth-rsa.c auth.c auth.h auth2-pubkey.c servconf.c servconf.h]
[sshd.c sshd_config sshd_config.5]
new sshd_config option AuthorizedKeysCommand to support fetching
authorized_keys from a command in addition to (or instead of) from
the filesystem. The command is run as the target server user unless
another specified via a new AuthorizedKeysCommandUser option.
patch originally by jchadima AT redhat.com, reworked by me; feedback
and ok markus@
[servconf.c servconf.h sshd.c sshd_config]
Turn on systrace sandboxing of pre-auth sshd by default for new installs
by shipping a config that overrides the current UsePrivilegeSeparation=yes
default. Make it easier to flip the default in the future by adding too.
[servconf.c servconf.h sshd_config.5]
sshd_config: extend Match to allow AcceptEnv and {Allow,Deny}{Users,Groups}
this allows 'Match LocalPort 1022' combined with 'AllowUser bauer'
ok djm@ (back in March)
- dtucker@cvs.openbsd.org 2012/05/13 01:42:32
[servconf.h servconf.c sshd.8 sshd.c auth.c sshd_config.5]
Add "Match LocalAddress" and "Match LocalPort" to sshd and adjust tests
to match. Feedback and ok djm@ markus@.
[servconf.c servconf.h sshd.c sshd_config sshd_config.5]
VersionAddendum option to allow server operators to append some arbitrary
text to the SSH-... banner; ok deraadt@ "don't care" markus@
[channels.c auth-options.c servconf.c channels.h sshd.8]
Add wildcard support to PermitOpen, allowing things like "PermitOpen
localhost:*". bz #1857, ok djm markus.
[servconf.c servconf.h sshd.c sshd_config.5 sandbox-rlimit.c]
[sandbox-systrace.c sandbox.h configure.ac Makefile.in]
introduce sandboxing of the pre-auth privsep child using systrace(4).
This introduces a new "UsePrivilegeSeparation=sandbox" option for
sshd_config that applies mandatory restrictions on the syscalls the
privsep child can perform. This prevents a compromised privsep child
from being used to attack other hosts (by opening sockets and proxying)
or probing local kernel attack surface.
The sandbox is implemented using systrace(4) in unsupervised "fast-path"
mode, where a list of permitted syscalls is supplied. Any syscall not
on the list results in SIGKILL being sent to the privsep child. Note
that this requires a kernel with the new SYSTR_POLICY_KILL option.
UsePrivilegeSeparation=sandbox will become the default in the future
so please start testing it now.
feedback dtucker@; ok markus@
- djm@cvs.openbsd.org 2011/05/23 03:30:07
[auth-rsa.c auth.c auth.h auth2-pubkey.c monitor.c monitor_wrap.c pathnames.h servconf.c servconf.h sshd.8 sshd_config sshd_config.5]
allow AuthorizedKeysFile to specify multiple files, separated by spaces.
Bring back authorized_keys2 as a default search path (to avoid breaking
existing users of this file), but override this in sshd_config so it will
be no longer used on fresh installs. Maybe in 2015 we can remove it
entierly :)
feedback and ok markus@ dtucker@
[monitor.c monitor_wrap.c servconf.c servconf.h]
use a macro to define which string options to copy between configs
for Match. This avoids problems caused by forgetting to keep three
code locations in perfect sync and ordering
"this is at once beautiful and horrible" + ok dtucker@
[servconf.c]
the options TrustedUserCAKeys, RevokedKeysFile, AuthorizedKeysFile
and AuthorizedPrincipalsFile were not being correctly applied in
Match blocks, despite being overridable there; ok dtucker@
[auth.c auth.h auth2-pubkey.c pathnames.h servconf.c servconf.h]
remove support for authorized_keys2; it is a relic from the early days
of protocol v.2 support and has been undocumented for many years;
ok markus@
[clientloop.c misc.c misc.h packet.c packet.h readconf.c readconf.h]
[servconf.c servconf.h session.c ssh.c ssh_config.5 sshd_config.5]
allow ssh and sshd to set arbitrary TOS/DSCP/QoS values instead of
hardcoding lowdelay/throughput.
bz#1733 patch from philipp AT redfish-solutions.com; ok markus@ deraadt@
[kex.c kex.h kexecdh.c kexecdhc.c kexecdhs.c readconf.c readconf.h]
[servconf.c servconf.h ssh_config.5 sshconnect2.c sshd.c sshd_config.5]
add a KexAlgorithms knob to the client and server configuration to allow
selection of which key exchange methods are used by ssh(1) and sshd(8)
and their order of preference.
ok markus@
[servconf.c sshd_config.5]
expose some more sshd_config options inside Match blocks:
AuthorizedKeysFile AuthorizedPrincipalsFile
HostbasedUsesNameFromPacketOnly PermitTunnel
bz#1764; feedback from imorgan AT nas.nasa.gov; ok dtucker@
[auth-options.c auth-options.h auth.c auth.h auth2-pubkey.c]
[key.c servconf.c servconf.h sshd.8 sshd_config.5]
add some optional indirection to matching of principal names listed
in certificates. Currently, a certificate must include the a user's name
to be accepted for authentication. This change adds the ability to
specify a list of certificate principal names that are acceptable.
When authenticating using a CA trusted through ~/.ssh/authorized_keys,
this adds a new principals="name1[,name2,...]" key option.
For CAs listed through sshd_config's TrustedCAKeys option, a new config
option "AuthorizedPrincipalsFile" specifies a per-user file containing
the list of acceptable names.
If either option is absent, the current behaviour of requiring the
username to appear in principals continues to apply.
These options are useful for role accounts, disjoint account namespaces
and "user@realm"-style naming policies in certificates.
feedback and ok markus@
[auth-rh-rsa.c auth-rsa.c auth.c auth.h auth2-hostbased.c auth2-pubkey.c]
[authfile.c authfile.h hostfile.c hostfile.h servconf.c servconf.h]
[ssh-keygen.c ssh.1 sshconnect.c sshd_config.5]
Add a TrustedUserCAKeys option to sshd_config to specify CA keys that
are trusted to authenticate users (in addition than doing it per-user
in authorized_keys).
Add a RevokedKeys option to sshd_config and a @revoked marker to
known_hosts to allow keys to me revoked and banned for user or host
authentication.
feedback and ok markus@
- djm@cvs.openbsd.org 2010/02/26 20:29:54
[PROTOCOL PROTOCOL.agent PROTOCOL.certkeys addrmatch.c auth-options.c]
[auth-options.h auth.h auth2-pubkey.c authfd.c dns.c dns.h hostfile.c]
[hostfile.h kex.h kexdhs.c kexgexs.c key.c key.h match.h monitor.c]
[myproposal.h servconf.c servconf.h ssh-add.c ssh-agent.c ssh-dss.c]
[ssh-keygen.1 ssh-keygen.c ssh-rsa.c ssh.1 ssh.c ssh2.h sshconnect.c]
[sshconnect2.c sshd.8 sshd.c sshd_config.5]
Add support for certificate key types for users and hosts.
OpenSSH certificate key types are not X.509 certificates, but a much
simpler format that encodes a public key, identity information and
some validity constraints and signs it with a CA key. CA keys are
regular SSH keys. This certificate style avoids the attack surface
of X.509 certificates and is very easy to deploy.
Certified host keys allow automatic acceptance of new host keys
when a CA certificate is marked as sh/known_hosts.
see VERIFYING HOST KEYS in ssh(1) for details.
Certified user keys allow authentication of users when the signing
CA key is marked as trusted in authorized_keys. See "AUTHORIZED_KEYS
FILE FORMAT" in sshd(8) for details.
Certificates are minted using ssh-keygen(1), documentation is in
the "CERTIFICATES" section of that manpage.
Documentation on the format of certificates is in the file
PROTOCOL.certkeys
feedback and ok markus@
djm@openbsd.org
naddy@openbsd.org
dtucker@openbsd.org
Darren Tucker
Damien Miller
deraadt@openbsd.org
chris@openbsd.org
markus@openbsd.org
jsg@openbsd.org
lteo@openbsd.org