[openssl-dev] [openssl.org #4594] openssl s_client issue on windows platform

[Matt Caswell via RT]

On 28/06/16 16:18, Oleg Kukartsev via RT wrote:
> Guys,
> There is an issue with openssl s_client described here:
> http://stackoverflow.com/questions/25760596/how-to-terminate-openssl-s-client-after-connection
> Basically, it prevents openssl s_client automation on windows platform.
> 
> And a similar question here:
> http://stackoverflow.com/questions/19147280/how-do-you-pipe-echo-into-openssl
> 
> It works on Linux just fine, but not on windows.
> I’ve tested it on windows server 2012 R2 SP1 with following openssl
> versions:
> OpenSSL 1.0.2f  28 Jan 2016
> OpenSSL 1.0.2h  3 May 2016

It would be interesting to try this on OpenSSL 1.1.0. I have a suspicion
this issue is fixed there.

Matt


> 
> Downloaded from here:
> https://slproweb.com/products/Win32OpenSSL.html
> 
> To clarify:
> A single command like this
> openssl s_client -brief -servername some.dns.name -connect
> 192.168.68.160:443 <nul
> waits for “any key” click (enter, esc, etc.)
> If I run a batch with 10 commands like above, only 1 one will wait for key
> click, all others will run right away, because a “key” is in the buffer
> still, and openssl reads from pipe in fact (i.e. <nul )
> 
> And after running batch, “any key” I clicked will be interpreted by shell,
> since openssl has never read it.
> 
> Here is speculation, why it might behave like this:
> http://openssl.6102.n7.nabble.com/openssl-s-client-takes-over-30-seconds-to-complete-on-Windows-td45781.html
> Dave Thompson-5
> <http://openssl.6102.n7.nabble.com/template/NamlServlet.jtp?macro=user_nodes&user=74>
> Jul
> 05, 2013; 9:19pm wrote why it might be happening:
> I'll guess this is because WaitForSingleObject doesn't treat a diskfile or
> full pipe as 'notified' (unlike a console), whereas Unix select() does
> treat them as 'ready' (like a tty).
> 
> Let me know, if I need to clarify any further.
> Thank you!
> Oleg Kukartsev
> 


-- 
Ticket here: http://rt.openssl.org/Ticket/Display.html?id=4594
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