Microblaze - slow with Dropbear 2014.63

[William Welch]

Greetings,

I tried the new Dropbear (which is included with the new Buildroot 2014.02
yeah!) on my slow Microblaze system.  I think there is some improvement,
but I wonder if I do not have the configuration optimized...  The
noticeable delay is about 85 seconds, at this debug statement from the
client SSH:  expecting SSH2_MSG_KEX_ECDH_REPLY

Suggestions welcome!

William



On Wed, Feb 19, 2014 at 8:28 AM, Matt Johnston <matt at ucc.asn.au> wrote:

> Hi all,
>
> Dropbear 2014.63 is released containing mostly accumulated
> bug fixes.  Some are for regressions in the past couple of
> releases so it's recommended for everyone.
>
> As usual the URL is
> https://matt.ucc.asn.au/dropbear/dropbear.html
> or mirrored at
> https://dropbear.nl/mirror/
>
> Cheers,
> Matt
>
> 2014.63 - Wednesday 19 February 2014
>
> - Fix ~. to terminate a client interactive session after waking a laptop
>   from sleep.
>
> - Changed port separator syntax again, now using host^port. This is because
>   IPv6 link-local addresses use %. Reported by Gui Iribarren
>
> - Avoid constantly relinking dropbearmulti target, fix "make install"
>   for multi target, thanks to Mike Frysinger
>
> - Avoid getting stuck in a loop writing huge key files, reported by Bruno
>   Thomsen
>
> - Don't link dropbearkey or dropbearconvert to libz or libutil,
>   thanks to Nicolas Boos
>
> - Fix linking -lcrypt on systems without /usr/lib, thanks to Nicolas Boos
>
> - Avoid crash on exit due to cleaned up keys before last packets are sent,
>   debugged by Ronald Wahl
>
> - Fix a race condition in rekeying where Dropbear would exit if it
> received a
>   still-in-flight packet after initiating rekeying. Reported by Oliver
> Metz.
>   This is a longstanding bug but is triggered more easily since 2013.57
>
> - Fix README for ecdsa keys, from Catalin Patulea
>
> - Ensure that generated RSA keys are always exactly the length
>   requested. Previously Dropbear always generated N+16 or N+15 bit keys.
>   Thanks to Unit 193
>
> - Fix DROPBEAR_CLI_IMMEDIATE_AUTH mode which saves a network round trip if
> the
>   first public key succeeds. Still not enabled by default, needs more
>   compatibility testing with other implementations.
>
> - Fix for port 0 forwarding in the client and port forwarding with Apache
> MINA SSHD. Thanks to
>
> - Fix for bad system linux/pkt-sched.h header file with older Linux
>   kernels, from Steve Dover
>
> - Fix signal handlers so that errno is saved, thanks to Erik Ahlén for a
> patch
>   and Mark Wickham for independently spotting the same problem.
>
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