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Add compatibility aliases for ProtocolKeepAlives and SetupTimeOut, supported
in previous versions of Debian's OpenSSH package but since superseded by
ServerAliveInterval. (We're probably stuck with this bit for
compatibility.)
In batch mode, default ServerAliveInterval to five minutes.
Adjust documentation to match and to give some more advice on use of
keepalives.
Author: Ian Jackson <ian@chiark.greenend.org.uk>
Author: Matthew Vernon <matthew@debian.org>
Author: Colin Watson <cjwatson@debian.org>
Last-Update: 2013-09-14
Patch-Name: keepalive-extensions.patch
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Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1712
Last-Update: 2013-09-14
Patch-Name: ssh1-keepalive.patch
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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.
Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1242
Last-Updated: 2014-02-10
Patch-Name: gssapi.patch
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[ssh_config.5]
fix inverted meaning of 'no' and 'yes' for CanonicalizeFallbackLocal
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[ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh-keysign.8 ssh.1]
[ssh_config.5 sshd.8 sshd_config.5]
add missing mentions of ed25519; ok djm@
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[authfd.c authfile.c key.c key.h myproposal.h pathnames.h readconf.c]
[servconf.c ssh-agent.c ssh-keygen.c ssh-keyscan.1 ssh-keyscan.c]
[ssh-keysign.c ssh.c ssh_config.5 sshd.8 sshd.c verify.c ssh-ed25519.c]
[sc25519.h sc25519.c hash.c ge25519_base.data ge25519.h ge25519.c]
[fe25519.h fe25519.c ed25519.c crypto_api.h blocks.c]
support ed25519 keys (hostkeys and user identities) using the public
domain ed25519 reference code from SUPERCOP, see
http://ed25519.cr.yp.to/software.html
feedback, help & ok djm@
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[ssh_config.5 sshd_config.5]
no need for .Pp before displays;
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[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@
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[ssh_config.5 sshd_config.5]
the default kex is now curve25519-sha256@libssh.org
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[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@
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[ssh_config.5]
tweak the "exec" description, as worded by djm;
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[readconf.c ssh_config.5]
rename "command" subclause of the recently-added "Match" keyword to
"exec"; it's shorter, clearer in intent and we might want to add the
ability to match against the command being executed at the remote end in
the future.
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[ssh_config.5]
document % expansions performed by "Match command ..."
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[ssh.c ssh_config.5]
one I missed in previous: s/isation/ization/
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[readconf.c readconf.h ssh.1 ssh.c ssh_config.5]
s/canonicalise/canonicalize/ for consistency with existing spelling,
e.g. authorized_keys; pointed out by naddy@
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[ssh_config.5]
tweak previous;
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[readconf.c readconf.h roaming_client.c ssh.1 ssh.c ssh_config.5]
[sshconnect.c sshconnect.h]
Implement client-side hostname canonicalisation to allow an explicit
search path of domain suffixes to use to convert unqualified host names
to fully-qualified ones for host key matching.
This is particularly useful for host certificates, which would otherwise
need to list unqualified names alongside fully-qualified ones (and this
causes a number of problems).
"looks fine" markus@
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[ssh.1 ssh_config.5]
tweak previous;
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[readconf.c readconf.h ssh-keysign.c ssh.c ssh_config.5]
add a "Match" keyword to ssh_config that allows matching on hostname,
user and result of arbitrary commands. "nice work" markus@
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[ssh.1 ssh_config.5]
some proxyusefdpass tweaks;
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[readconf.c readconf.h ssh_config.5 sshconnect.c]
Add a ssh_config ProxyUseFDPass option that supports the use of
ProxyCommands that establish a connection and then pass a connected
file descriptor back to ssh(1). This allows the ProxyCommand to exit
rather than have to shuffle data back and forth and enables ssh to use
getpeername, etc. to obtain address information just like it does with
regular directly-connected sockets. ok markus@
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[ssh-keygen.1 ssh.1 ssh_config.5 sshd.8 sshd_config.5]
do not use Sx for sections outwith the man page - ingo informs me that
stuff like html will render with broken links;
issue reported by Eric S. Raymond, via djm
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[ssh_config.5]
explicitly mention that IdentitiesOnly can be used with IdentityFile
to control which keys are offered from an agent.
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[ssh_config.5]
put IgnoreUnknown in the right place;
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[ssh_config.5 readconf.h readconf.c]
add the ability to ignore specific unrecognised ssh_config options;
bz#866; ok markus@
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[ssh_config sshconnect2.c packet.c readconf.h readconf.c clientloop.c
ssh_config.5 packet.h]
Add an optional second argument to RekeyLimit in the client to allow
rekeying based on elapsed time in addition to amount of traffic.
with djm@ jmc@, ok djm
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[PROTOCOL authfile.c cipher.c cipher.h kex.c kex.h monitor_wrap.c]
[myproposal.h packet.c ssh_config.5 sshd_config.5]
support AES-GCM as defined in RFC 5647 (but with simpler KEX handling)
ok and feedback djm@
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[PROTOCOL authfile.c cipher.c cipher.h kex.h mac.c myproposal.h]
[packet.c ssh_config.5 sshd_config.5]
add encrypt-then-mac (EtM) modes to openssh by defining new mac algorithms
that change the packet format and compute the MAC over the encrypted
message (including the packet size) instead of the plaintext data;
these EtM modes are considered more secure and used by default.
feedback and ok djm@
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[ssh_config.5 sshconnect2.c]
Make IdentitiesOnly apply to keys obtained from a PKCS11Provider.
This allows control of which keys are offered from tokens using
IdentityFile. ok markus@
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[myproposal.h ssh_config.5 umac.h sshd_config.5 ssh.1 sshd.8 mac.c]
add umac128 variant; ok djm@ at n2k12
(note: further Makefile work is required)
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[ssh_config.5 sshd_config.5]
match the documented MAC order of preference to the actual one;
ok dtucker@
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[mac.c myproposal.h ssh_config.5 sshd_config.5]
Remove hmac-sha2-256-96 and hmac-sha2-512-96 MACs since they were removed
from draft6 of the spec and will not be in the RFC when published. Patch
from mdb at juniper net via bz#2023, ok markus.
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[ssh_config.5]
RSA instead of DSA twice. From Steve.McClellan at radisys com
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[ssh_config.5 sshd_config.5]
fix typo in IPQoS parsing: there is no "AF14" class, but there is
an "AF21" class. Spotted by giesen AT snickers.org; ok markus stevesk
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[mac.c myproposal.h ssh.1 ssh_config.5 sshd.8 sshd_config.5]
Add new SHA256 and SHA512 based HMAC modes from
http://www.ietf.org/id/draft-dbider-sha2-mac-for-ssh-02.txt
Patch from mdb AT juniper.net; feedback and ok markus@
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[ssh_config.5]
explain IdentifyFile's semantics a little better, prompted by bz#1898
ok dtucker jmc
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[readconf.c readconf.h ssh.c ssh_config.5 sshconnect.c sshconnect2.c]
Remove undocumented legacy options UserKnownHostsFile2 and
GlobalKnownHostsFile2 by making UserKnownHostsFile/GlobalKnownHostsFile
accept multiple paths per line and making their defaults include
known_hosts2; ok markus
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[ssh_config.5]
- tweak previous
- come consistency fixes
ok djm
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[clientloop.c mux.c readconf.c readconf.h ssh.c ssh_config.5]
Add a RequestTTY ssh_config option to allow configuration-based
control over tty allocation (like -t/-T); ok markus@
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[readconf.c ssh_config.5]
support negated Host matching, e.g.
Host *.example.org !c.example.org
User mekmitasdigoat
Will match "a.example.org", "b.example.org", but not "c.example.org"
ok markus@
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[ssh.c ssh_config.5]
add a %L expansion (short-form of the local host name) for ControlPath;
sync some more expansions with LocalCommand; ok markus@
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[ssh_config.5 sshd_config.5]
explain that IPQoS arguments are separated by whitespace; iirc requested
by jmc@ a while back
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[auth.c hostfile.c hostfile.h ssh.c ssh_config.5 sshconnect.c]
[sshconnect.h sshconnect2.c]
automatically order the hostkeys requested by the client based on
which hostkeys are already recorded in known_hosts. This avoids
hostkey warnings when connecting to servers with new ECDSA keys
that are preferred by default; with markus@
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[ssh_config.5]
libary -> library;
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[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@
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[scp.1 ssh-add.1 ssh-keygen.1 ssh.1 ssh_config.5 sshd.8 sshd_config.5]
knock out some "-*- nroff -*-" lines;
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[ssh.1 ssh_config.5]
ssh.1: add kexalgorithms to the -o list
ssh_config.5: format the kexalgorithms in a more consistent
(prettier!) way
ok djm
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[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@
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[PROTOCOL PROTOCOL.agent PROTOCOL.certkeys auth2-jpake.c authfd.c]
[authfile.c buffer.h dns.c kex.c kex.h key.c key.h monitor.c]
[monitor_wrap.c myproposal.h packet.c packet.h pathnames.h readconf.c]
[ssh-add.1 ssh-add.c ssh-agent.1 ssh-agent.c ssh-keygen.1 ssh-keygen.c]
[ssh-keyscan.1 ssh-keyscan.c ssh-keysign.8 ssh.1 ssh.c ssh2.h]
[ssh_config.5 sshconnect.c sshconnect2.c sshd.8 sshd.c sshd_config.5]
[uuencode.c uuencode.h bufec.c kexecdh.c kexecdhc.c kexecdhs.c ssh-ecdsa.c]
Implement Elliptic Curve Cryptography modes for key exchange (ECDH) and
host/user keys (ECDSA) as specified by RFC5656. ECDH and ECDSA offer
better performance than plain DH and DSA at the same equivalent symmetric
key length, as well as much shorter keys.
Only the mandatory sections of RFC5656 are implemented, specifically the
three REQUIRED curves nistp256, nistp384 and nistp521 and only ECDH and
ECDSA. Point compression (optional in RFC5656 is NOT implemented).
Certificate host and user keys using the new ECDSA key types are supported.
Note that this code has not been tested for interoperability and may be
subject to change.
feedback and ok markus@
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[ssh.1 ssh_config.5 sshd.8]
Remove mentions of weird "addr/port" alternate address format for IPv6
addresses combinations. It hasn't worked for ages and we have supported
the more commen "[addr]:port" format for a long time. ok jmc@ markus@
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