path: root/PROTOCOL
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authorDamien Miller <>2013-11-21 14:12:23 +1100
committerDamien Miller <>2013-11-21 14:12:23 +1100
commit0fde8acdad78a4d20cadae974376cc0165f645ee (patch)
tree6e6aa82b73163bcb412920050d98f82ca9f4e86e /PROTOCOL
parentfdb2306acdc3eb2bc46b6dfdaaf6005c650af22a (diff)
- 2013/11/21 00:45:44
[ 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 "" 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: 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@
Diffstat (limited to 'PROTOCOL')
1 files changed, 6 insertions, 1 deletions
diff --git a/PROTOCOL b/PROTOCOL
index 0363314c..cace97f8 100644
@@ -91,6 +91,11 @@ an MAC algorithm. Additionally, if AES-GCM is selected as the cipher
the exchanged MAC algorithms are ignored and there doesn't have to be
a matching MAC.
+1.7 transport: authenticated encryption
+OpenSSH supports authenticated encryption using ChaCha20 and Poly1305
+as described in PROTOCOL.chacha20poly1305.
2. Connection protocol changes
2.1. connection: Channel write close extension ""
@@ -345,4 +350,4 @@ respond with a SSH_FXP_STATUS message.
This extension is advertised in the SSH_FXP_VERSION hello with version
-$OpenBSD: PROTOCOL,v 1.21 2013/10/17 00:30:13 djm Exp $
+$OpenBSD: PROTOCOL,v 1.22 2013/11/21 00:45:43 djm Exp $