Re: Windows HTTPS Issue

[danieljboyd]

On Thu, May 14, 2020 at 10:58:11PM +0200, Riccardo Mottola wrote:
> Hi,
> 
> danieljboyd@icloud.com wrote:
> > I'm having a strange issue with an Restful Api client class I'm trying
> > to write. Currently, I'm trying to get it to work with Microsoft's
> > oauth2 endpoints.
> >
> > I'm trying to make a HTTP post request using [NSURLConnection
> > sendSynchronousRequest: returningResponse: error:]. I'm just doing a
> > basic application/x-www-form-urlencoded request with a query string in
> > the body of the request.
> >
> > When I send the request to Microsoft's end point, it times out. If I
> > send the same request to postman echo (an endpoint that just echoes
> > back your request), it works fine. Both endpoints use https.
> >
> > Moreover, when I compile and run the code in Linux, *everything* works
> > fine, including contacting Microsoft's servers.
> >
> > My actual code would be difficult to follow here, but this is
> > essentially what I'm doing:
> >
> > NSMutableURLRequest * req = [[NSMutableURLRequest alloc] initWithURL:
> >     [NSURL
> >     //times out with this
> >     URLWithString:@"https://login.microsoftonline.com/XXX/oauth2/";]];
> >     //works fine with this
> >     //URLWithString:@"https://postman-echo.com/post";]];
> >
> > //where XXX is my Office 365 tenant GUID
> >
> > [req addValue:@"application/x-www-form-urlencoded"
> >     forHTTPHeaderField:@"Content-Type"];
> >
> > //all of this is property escaped with 
> > //stringByAddingPercentEncodingWithAllowedCharacters:
> > NSData * query = [@"value1=key1&value2=key2, etc" dataUsingEncoding:
> >     NSUTF8StringEncoding];
> >
> > [req addValue:[NSString stringWithFormat:@"%d", [query length]
> >      forHTTPHeaderField: @"Content-Length"];
> > [req setHTTPBody:query];
> >
> > NSURLResponse * httpResponse;
> > NSError * error;
> > NSData * response = [NSURLConnection sendSynchronousRequest: req
> >                                      returningResponse: &httpResponse
> >                                                  error: &error];
> >                                 
> >
> > So, yeah... works fine in Linux. Works in Windows with a different URL.
> > Times out with this URL in Windows. Is this an SSL issue? How would I
> > even go about troubleshooting it?
> >
> 
> 
> hard to say... what is your environment? how is it built?
> 
> I have a client which connects to SOAP HTTPS.
> 
> I have an "old" win environment which I patch and keep together by
> miracle based on gcc 3.4 and it connects to HTTPS fine (up to TLS 1.2, I
> updated the SSL library with great pain).
> 
> Instead a current build environment on windows built on latest
> MSYS2/MINGW64 - it looks it never connects
> 
> Riccardo

In Windows, I'm using the stock version from the gnustep.org windows
installers, on Windows 10 v1909. So I'm on MSYS1/MINGW...

I don't really want a super custom environment because I'd rather not
complicate deploying to other computers in the future.

On Linux, I've tried two different setups: one is on the same computer
WSL+Debian 10. And I also have a laptop running Ubuntu 20.04. Works on
both of those.

Thanks for the help! :)

Daniel