On Oct 31, 2014, at 10:01 AM, Quinn The Eskimo! <eski...@apple.com> wrote:

> 
> On 31 Oct 2014, at 16:58, Mitchell Laurren-Ring <li...@rynosoft.com> wrote:
> 
>> Calling SSLSetProtocolVersionEnabled with kTLSProtocol1Only gives me an -50 
>> error. kSSLProtocolAll gives me error 0.
> 
> No, I mean try forcing TLS 1.0 on the /client/.  IIRC the server side of 
> Secure Transport has problems negotiating down from TLS 1.2 to TLS 1.0.
> 
> One option here is to use the OS X built-in version of 
> <x-man-page://1/s_client>, which uses an old version of OpenSSL that doesn't 
> support TLS 1.2.

Very good. If I don’t specify the protocol with s_client, I get the same 
SSL-session info as when I use -tls1. I’m able to send from s_client, receive 
in my server code, respond from server code and receive that response in 
s_client.

So, given that my clients are web browsers, what are my options?

> 
>> FYI, I’m using the OS X 10.6 SDK because I’m stuck in Xcode 3.2.6.
> 
> 
> Why are you stuck on Xcode 3.2.6?
> 
The answer to that question is very complex but suffice to say that I have been 
working for several years to move our code forward to the current toolset. 
Unfortunately, I have not reached that goal yet due to a variety of issues over 
which I have no control (management, QA, etc).

/Mick


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