- djm@cvs.openbsd.org 2013/11/21 00:45:44
[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@
diff --git a/sshd_config.5 b/sshd_config.5
index 02c45a7..b9864ff 100644
--- a/sshd_config.5
+++ b/sshd_config.5
@@ -33,8 +33,8 @@
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
-.\" $OpenBSD: sshd_config.5,v 1.166 2013/11/02 22:39:19 markus Exp $
-.Dd $Mdocdate: November 2 2013 $
+.\" $OpenBSD: sshd_config.5,v 1.167 2013/11/21 00:45:44 djm Exp $
+.Dd $Mdocdate: November 21 2013 $
.Dt SSHD_CONFIG 5
.Os
.Sh NAME
@@ -335,7 +335,8 @@
.It Cm Ciphers
Specifies the ciphers allowed for protocol version 2.
Multiple ciphers must be comma-separated.
-The supported ciphers are
+The supported ciphers are:
+.Pp
.Dq 3des-cbc ,
.Dq aes128-cbc ,
.Dq aes192-cbc ,
@@ -349,15 +350,24 @@
.Dq arcfour256 ,
.Dq arcfour ,
.Dq blowfish-cbc ,
+.Dq cast128-cbc ,
and
-.Dq cast128-cbc .
+.Dq chacha20-poly1305@openssh.com .
+.Pp
The default is:
+.Pp
.Bd -literal -offset 3n
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,
aes128-gcm@openssh.com,aes256-gcm@openssh.com,
+chacha20-poly1305@openssh.com,
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,
aes256-cbc,arcfour
.Ed
+.Pp
+The list of available ciphers may also be obtained using the
+.Fl Q
+option of
+.Xr ssh 1 .
.It Cm ClientAliveCountMax
Sets the number of client alive messages (see below) which may be
sent without