> On Nov 14, 2017, at 2:07 PM, Ray Satiro via curl-library 
> <[email protected]> wrote:
> 
> On 11/14/2017 3:56 PM, Kelly Graus wrote:
>> 
>> 
>>> On Nov 14, 2017, at 1:10 PM, Ray Satiro via curl-library 
>>> <[email protected] <mailto:[email protected]>> wrote:
>>> 
>>> On 11/13/2017 6:43 PM, Kelly Graus wrote:
>>>> I’ve been using libcurl in an OS X app for several years, linking against 
>>>> the system provided dynamic library.  Recently we wanted to add the 
>>>> ability to do a multipart form post, which requires a newer version of 
>>>> libcurl than is provided by Apple.  So I downloaded the source and 
>>>> compiled it using the following options:
>>>> 
>>>> ./configure --prefix=/usr/local/curl --with-darwinssl --enable-static 
>>>> --disable-ldap --disable-ldaps
>>>> 
>>>> I then link against the static library that is built, and everything works 
>>>> great.
>>>> 
>>>> However, when I build a release and run it on a different machine, I 
>>>> receive the following error whenever I try to download a file using HTTPS: 
>>>> "Problem with the SSL CA cert (path? access rights?).”
>>>> 
>>>> I’ve tried in on two test machines, both of which are running slightly 
>>>> older versions of OS X than what I used to compile with (10.11 and 10.12, 
>>>> where I’m using 10.13).  I don’t have another 10.13 machine right now to 
>>>> test if this is related to the OS version.
>>> 
>>> What is the curl_version() and turn on CURLOPT_VERBOSE [1] to check for
>>> relevant information.
>>> 
>>> [1]: https://curl.haxx.se/libcurl/c/CURLOPT_VERBOSE.html 
>>> <https://curl.haxx.se/libcurl/c/CURLOPT_VERBOSE.html>
>> 
>> Using curl_version_info, I get the following:
>> 
>> libcurl 7.56.1
>> ssl: SecureTransport
>> host: x86_64-apple-darwin17.2.0
>> protocols: dict, file, ftp, ftps, gopher, http, https, imap, imaps, pop3, 
>> pop3s, rtsp, smb, smbs, smtp, smtps, telnet, tftp
>> features: IPv6, SSL, libz, NTLM, asynchronous DNS, large file, NTLM-WB, Unix 
>> Sockets
>> 
>> With verbose output enabled, I see the underlying error is "SSL: can't load 
>> CA certificate file /etc/ssl/cert.pem.”  I’ve verified that this file is 
>> missing on the machines that don’t work.  I’m looking into where those files 
>> are supposed to be from, but if anyone knows it would be greatly appreciated!
> 
> That type is tiny i can barely read it. There is only one place it fails with 
> that error in darwinssl.c
> 
> https://github.com/curl/curl/blob/curl-7_56_1/lib/vtls/darwinssl.c#L1671 
> <https://github.com/curl/curl/blob/curl-7_56_1/lib/vtls/darwinssl.c#L1671>
> 
> ... and that would only happen if cafile was set which would only happen if 
> CURLOPT_CAINFO [1] was set in your program or configure set a default 
> location but iirc darwinssl is supposed to use apple's built in certificate 
> store by default.
> 
> [1]: https://curl.haxx.se/libcurl/c/CURLOPT_CAINFO.html 
> <https://curl.haxx.se/libcurl/c/CURLOPT_CAINFO.html>
> 

I’ve done a search through all our code, we never use CURLOPT_CAINFO.  I was 
under the impression that specifying —with-darwinssl and —without-ssl would 
build curl to use only SecureTransport and the OS X keychain, so I’m also 
confused as to why it’s trying to load a certificate from the file system.

You mention a configure option to set the default location - do you have any 
additional information about that?  I’m not specifically setting it when 
building, but maybe it’s something I need to disable?


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