Hi Eric,

lib...@bentleyemail.net wrote:
> I have an embedded linux project using buildroot which I've included
> libssh2 in.  The current configuration also is using dropbear.
> I am attempting to use curl with scp to retrieve a file stream but am
> getting an error.

Thank you for reporting! If master still has this issue we need to fix it
before release, which should be quite soon.


>    curl: (2) Failure establishing ssh session: -43,
>    I turned sshd debug up to level 3 and see: the error
>    Corrupted MAC on input. [preauth]  (full error log at end of this post)
..
> sshd[361421]: debug1: kex: client->server cipher: aes128-ctr MAC: 
> hmac-sha2-256 compression: none [preauth]
..
> sshd[361421]: debug1: SSH2_MSG_NEWKEYS received [preauth]
> sshd[361421]: debug2: set_newkeys: mode 0 [preauth]
> sshd[361421]: debug1: rekey in after 4294967296 blocks [preauth]
> sshd[361421]: debug1: KEX done [preauth]
> sshd[361421]: Corrupted MAC on input. [preauth]

Please provide us with more information:

What processor does your embedded system have? In particular endianess
and native bit size (32/64?)

What MAC is negotiated by the dropbear and OpenSSH clients you tested?

Are results identical with a server running an unpatched upstream OpenSSH?


Thank you and kind regards

//Peter
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