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refactor activation of rekeying
This makes automatic rekeying internal to the packet code (previously
the server and client loops needed to assist). In doing to it makes
application of rekey limits more accurate by accounting for packets
about to be sent as well as packets queued during rekeying events
themselves.
Based on a patch from dtucker@ which was in turn based on a patch
Aleksander Adamowski in bz#2521; ok markus@
Upstream-ID: a441227fd64f9739850ca97b4cf794202860fcd8
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printf argument casts to avoid warnings on strict
compilers
Upstream-ID: 7b9f6712cef01865ad29070262d366cf13587c9c
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include packet type of non-data packets in debug3 output;
ok markus dtucker
Upstream-ID: 034eaf639acc96459b9c5ce782db9fcd8bd02d41
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Revert "account for packets buffered but not yet
processed" change as it breaks for very small RekeyLimit values due to
continuous rekeying. ok djm@
Upstream-ID: 7e03f636cb45ab60db18850236ccf19079182a19
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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
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Account for packets buffered but not yet processed when
computing whether or not it is time to perform rekeying. bz#2521, based
loosely on a patch from olo at fb.com, ok djm@
Upstream-ID: 67e268b547f990ed220f3cb70a5624d9bda12b8c
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remove roaming support; ok djm@
Upstream-ID: 2cab8f4b197bc95776fb1c8dc2859dad0c64dc56
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Remove NULL-checks before sshbuf_free().
ok djm@
Upstream-ID: 5ebed00ed5f9f03b119a345085e8774565466917
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include remote port number in a few more messages; makes
tying log messages together into a session a bit easier; bz#2503 ok dtucker@
Upstream-ID: 9300dc354015f7a7368d94a8ff4a4266a69d237e
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Remove NULL-checks before free().
ok dtucker@
Upstream-ID: e3d3cb1ce900179906af36517b5eea0fb15e6ef8
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implement SHA2-{256,512} for RSASSA-PKCS1-v1_5 signatures
(user and host auth) based on draft-rsa-dsa-sha2-256-03.txt and
draft-ssh-ext-info-04.txt; with & ok djm@
Upstream-ID: cf82ce532b2733e5c4b34bb7b7c94835632db309
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fix OOB read in packet code caused by missing return
statement found by Ben Hawkes; ok markus@ deraadt@
Upstream-ID: a3e3a85434ebfa0690d4879091959591f30efc62
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fix memory leak in error path ok djm@
Upstream-ID: dd2f402b0a0029b755df029fc7f0679e1365ce35
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fix possible hang on closed output; bz#2469 reported by Tomas
Kuthan ok markus@
Upstream-ID: f7afd41810f8540f524284f1be6b970859f94fe3
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Do not cast result of malloc/calloc/realloc* if stdlib.h
is in scope ok krw millert
Upstream-ID: 5e50ded78cadf3841556649a16cc4b1cb6c58667
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include the peer's offer when logging a failure to
negotiate a mutual set of algorithms (kex, pubkey, ciphers, etc.) ok markus@
Upstream-ID: bbb8caabf5c01790bb845f5ce135565248d7c796
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refactor ssh_dispatch_run_fatal() to use sshpkt_fatal()
to better report error conditions. Teach sshpkt_fatal() about ECONNRESET.
Improves error messages on TCP connection resets. bz#2257
ok dtucker@
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fix compilation with OPENSSL=no; ok dtucker@
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don't leak 'setp' on error; noted by Nicholas Lemonias;
ok djm@
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add back the changes from rev 1.206, djm reverted this by
mistake in rev 1.207
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make rekey_limit for sshd w/privsep work; ok djm@
dtucker@
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Some packet error messages show the address of the peer,
but might be generated after the socket to the peer has suffered a TCP reset.
In these cases, getpeername() won't work so cache the address earlier.
spotted in the wild via deraadt@ and tedu@
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fix some leaks in error paths ok markus@
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avoid more fatal/exit in the packet.c paths that
ssh-keyscan uses; feedback and "looks good" markus@
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avoid fatal() calls in packet code makes ssh-keyscan more
reliable against server failures ok dtucker@ markus@
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Reduce use of <sys/param.h> and transition to <limits.h>
throughout. ok djm markus
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add experimental api for packet layer; ok djm@
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update packet.c & isolate, introduce struct ssh a) switch
packet.c to buffer api and isolate per-connection info into struct ssh b)
(de)serialization of the state is moved from monitor to packet.c c) the old
packet.c API is implemented in opacket.[ch] d) compress.c/h is removed and
integrated into packet.c with and ok djm@
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Disables and removes dependency on OpenSSL. Many features don't
work and the set of crypto options is greatly restricted. This
will only work on system with native arc4random or /dev/urandom.
Considered highly experimental for now.
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adapt mac.c to ssherr.h return codes (de-fatal) and
simplify dependencies ok djm@
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Remove unnecessary include: netinet/in_systm.h is not needed
by these programs.
NB. skipped for portable
ok deraadt@ millert@
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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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[Makefile.in auth-bsdauth.c auth-chall.c auth-options.c auth-rsa.c
[auth2-none.c auth2-pubkey.c authfile.c authfile.h cipher-3des1.c
[cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h
[digest-libc.c digest-openssl.c digest.h dns.c entropy.c hmac.h
[hostfile.c key.c key.h krl.c monitor.c packet.c rsa.c rsa.h
[ssh-add.c ssh-agent.c ssh-dss.c ssh-ecdsa.c ssh-ed25519.c
[ssh-keygen.c ssh-pkcs11-client.c ssh-pkcs11-helper.c ssh-pkcs11.c
[ssh-rsa.c sshbuf-misc.c sshbuf.h sshconnect.c sshconnect1.c
[sshconnect2.c sshd.c sshkey.c sshkey.h
[openbsd-compat/openssl-compat.c openbsd-compat/openssl-compat.h]
New key API: refactor key-related functions to be more library-like,
existing API is offered as a set of wrappers.
with and ok markus@
Thanks also to Ben Hawkes, David Tomaschik, Ivan Fratric, Matthew
Dempsky and Ron Bowes for a detailed review a few months ago.
NB. This commit also removes portable OpenSSH support for OpenSSL
<0.9.8e.
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[monitor.c packet.c packet.h]
unbreak compression, by re-init-ing the compression code in the
post-auth child. the new buffer code is more strict, and requires
buffer_init() while the old code was happy after a bzero();
originally from djm@
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[auth.c authfd.c authfile.c bufaux.c cipher.c cipher.h hostfile.c]
[kex.c key.c mac.c monitor.c monitor_wrap.c myproposal.h packet.c]
[roaming_client.c ssh-agent.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c]
[ssh-pkcs11.h ssh.c sshconnect.c sshconnect2.c sshd.c]
make compiling against OpenSSL optional (make OPENSSL=no);
reduces algorithms to curve25519, aes-ctr, chacha, ed25519;
allows us to explore further options; with and ok djm
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[authfile.c bufaux.c buffer.h channels.c krl.c mux.c packet.c packet.h]
[ssh-keygen.c]
buffer_get_string_ptr's return should be const to remind
callers that futzing with it will futz with the actual buffer
contents
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[packet.c]
demote a debug3 to PACKET_DEBUG; ok markus@
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[auth1.c auth2-chall.c auth2-passwd.c authfile.c bufaux.c bufbn.c]
[buffer.c cipher-3des1.c cipher.c clientloop.c gss-serv.c kex.c]
[kexdhc.c kexdhs.c kexecdhc.c kexgexc.c kexecdhs.c kexgexs.c key.c]
[monitor.c monitor_wrap.c packet.c readpass.c rsa.c serverloop.c]
[ssh-add.c ssh-agent.c ssh-dss.c ssh-ecdsa.c ssh-ed25519.c]
[ssh-keygen.c ssh-rsa.c sshconnect.c sshconnect1.c sshconnect2.c]
[sshd.c]
convert memset of potentially-private data to explicit_bzero()
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[authfile.c authfile.h cipher.c cipher.h key.c packet.c ssh-agent.c]
[ssh-keygen.c PROTOCOL.key] new private key format, bcrypt as KDF by
default; details in PROTOCOL.key; feedback and lots help from djm;
ok djm@
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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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[auth-options.c auth2-chall.c authfd.c channels.c cipher-3des1.c]
[clientloop.c gss-genr.c monitor_mm.c packet.c schnorr.c umac.c]
[sftp-client.c sftp-glob.c]
use calloc for all structure allocations; from markus@
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[auth-options.c auth-rsa.c bufaux.c buffer.h channels.c hostfile.c]
[hostfile.h mux.c packet.c packet.h roaming_common.c serverloop.c]
fix pointer-signedness warnings from clang/llvm-3.3; "seems nice" deraadt@
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[ssh-agent.c clientloop.c misc.h packet.c progressmeter.c misc.c
channels.c sandbox-systrace.c]
Use clock_gettime(CLOCK_MONOTONIC ...) for ssh timers so that things like
keepalives and rekeying will work properly over clock steps. Suggested by
markus@, "looks good" djm@.
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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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[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.
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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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[authfile.c cipher.c cipher.h kex.c kex.h kexecdh.c kexecdhc.c kexecdhs.c]
[key.c key.h mac.c mac.h packet.c ssh.1 ssh.c]
add the ability to query supported ciphers, MACs, key type and KEX
algorithms to ssh. Includes some refactoring of KEX and key type handling
to be table-driven; ok markus@
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[packet.c]
quiet disconnect notifications on the server from error() back to logit()
if it is a normal client closure; bz#2057 ok+feedback dtucker@
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[packet.c]
record "Received disconnect" messages at ERROR rather than INFO priority,
since they are abnormal and result in a non-zero ssh exit status; patch
from Iain Morgan in bz#2057; ok dtucker@
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