Re: Interop lsh and SSH-2.0-GitLab-SSHD

Peter Gutmann <[email protected]> Sat, 28 Oct 2023 13:56:06 +0000

Newsgroups	gmane.ietf.secsh
Message-ID	<SY4PR01MB62510D906E376EDBA239E26DEEA3A@SY4PR01MB6251.ausprd01.prod.outlook.com>

Ron Frederick <[email protected]> writes:

>Apologies for coming in late on this, but I noticed in the hex dump that the
>RSA public key the client is sending appears to be a 1536-bit key (the length
>field of the prime is 00 00 00 C1). If you try with a 2048-bit key, do you
>still see the abrupt connection close after the server sends back
>USERAUTH_FAILURE?

Before I do that, I had a second look at Mouse's public key:

00 00 00 09
            00 80 00 80 04 00 00 00 01
00 00 01 01
            00 aa 82 a6 3f 3b

I don't think it's n that's the problem, I'd say it's e, what *is* that value?
And what happens if you use a standard value like F4:

00 00 00 03 
            01 00 01

or even just something < 32 bits?

Peter.