[
https://issues.apache.org/jira/browse/SSHD-1017?focusedWorklogId=621403&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-621403
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ASF GitHub Bot logged work on SSHD-1017:
----------------------------------------
Author: ASF GitHub Bot
Created on: 11/Jul/21 22:38
Start Date: 11/Jul/21 22:38
Worklog Time Spent: 10m
Work Description: tomaswolf commented on pull request #176:
URL: https://github.com/apache/mina-sshd/pull/176#issuecomment-877871488
And it's in again.
Chacha20-poly1305 has a block size of 8, and `AbstractSession` computed
rekey limits for ciphers with block sizes < 16 wrongly, which caused SSHD-1191.
That's fixed now. If there are remaining problems with rekeying, they're in any
case not caused by the choice of cipher.
This chacha20-poly1305 implementation itself is perfectly fine.
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Issue Time Tracking
-------------------
Worklog Id: (was: 621403)
Time Spent: 5h 50m (was: 5h 40m)
> Add support for chacha20-poly1...@openssh.com
> ---------------------------------------------
>
> Key: SSHD-1017
> URL: https://issues.apache.org/jira/browse/SSHD-1017
> Project: MINA SSHD
> Issue Type: New Feature
> Reporter: Matt Sicker
> Priority: Major
> Fix For: 2.7.1
>
> Time Spent: 5h 50m
> Remaining Estimate: 0h
>
> See [protocol
> details|https://github.com/openbsd/src/blob/master/usr.bin/ssh/PROTOCOL.chacha20poly1305].
> * [RFC 7539|https://tools.ietf.org/html/rfc7539] describes the
> ChaCha20-Poly1305 algorithm.
> * [Dropbear
> implementation|https://github.com/mkj/dropbear/blob/master/chachapoly.c]
> * [OpenSSH
> implementation|https://github.com/openbsd/src/blob/master/usr.bin/ssh/cipher-chachapoly-libcrypto.c]
> The cipher is provided by Bouncycastle.
> As a bonus, this could potentially be adapted to propose an equivalent
> AES/GCM cipher encoding to how OpenSSH implements this ChaCha20-Poly1305
> cipher.
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