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https://issues.apache.org/jira/browse/SSHD-1017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17216791#comment-17216791
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Jeremy Norris commented on SSHD-1017:
-------------------------------------
I've not researched the Bouncy Castle implementation to determine if it would
be feasible. For the JSch implementation, I was attempting to avoid adding a
dependency on an alternate security provider and came across the implementation
in the OpenJAX project (which appears to be derived from the C version at
https://github.com/floodyberry/poly1305-donna). I wrote some unit tests for the
OpenJAX implementation using the RFC 7539 test vectors and some additional
vectors from the BoringSSL project from Google to confirm that it seemed to
work correctly.
I would assume that if Bouncy Castle allows instantiating a Poly1305
javax.crypto.Mac instance (via something like Mac.getInstance("Poly1305")),
then it would be usable.
I think it would be valuable if the community could propose an RFC
implementation for SSH that adheres to the RFC 7539 definitions, but I'm not
sure if it matters unless the OpenSSH project decides to implement it, since
they are the defacto reference implementation for SSH.
> Add support for [email protected]
> ---------------------------------------------
>
> Key: SSHD-1017
> URL: https://issues.apache.org/jira/browse/SSHD-1017
> Project: MINA SSHD
> Issue Type: New Feature
> Reporter: Matt Sicker
> Priority: Major
>
> 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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