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clarify ordering of subkeys; pointed out by ietf-ssh AT
 stbuehler.de

Upstream-ID: 05ebe9f949449a555ebce8e0aad7c8c9acaf8463
This commit is contained in:
djm@openbsd.org 2016-05-03 13:10:24 +00:00 committed by Damien Miller
parent cca3b43958
commit 05855bf2ce
1 changed files with 3 additions and 1 deletions
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4
PROTOCOL.chacha20poly1305
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@ -34,6 +34,8 @@ Detailed Construction
The chacha20-poly1305@openssh.com cipher requires 512 bits of key
material as output from the SSH key exchange. This forms two 256 bit
keys (K_1 and K_2), used by two separate instances of chacha20.
The first 256 bits consitute K_2 and the second 256 bits become
K_1.
The instance keyed by K_1 is a stream cipher that is used only
to encrypt the 4 byte packet length field. The second instance,
@ -101,5 +103,5 @@ References
[3] "ChaCha20 and Poly1305 based Cipher Suites for TLS", Adam Langley
http://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-03
$OpenBSD: PROTOCOL.chacha20poly1305,v 1.2 2013/12/02 02:50:27 djm Exp $
$OpenBSD: PROTOCOL.chacha20poly1305,v 1.3 2016/05/03 13:10:24 djm Exp $