I made a new PR #4371, to allow application using libcurl with a pkcs12 SSL client certificate in memory instead file.
<https://github.com/curl/curl/pull/4371> https://github.com/curl/curl/pull/4371 We talked 3 year ago about this feature. <https://curl.haxx.se/mail/lib-2016-08/0045.html> https://curl.haxx.se/mail/lib-2016-08/0045.html https://curl.haxx.se/mail/lib-2016-08/0050.html So an application can just do this : void *certdata; size_t filesize; /* now fill certdata and filesize with pkcs12 certificate in memory */ struct curl_blob structblob; curl_init_paramblob_struct_dup((&structblob), certdata, (size_t)filesize); my_setopt_str(curl, CURLOPT_SSLCERT, &structblob); For testing the API, the command line curl (when compiled with CURLDEBUG or DEBUGBUILD macro) can be used with --cert loadmem=cert.p12 This does exactly same jobs than --cert cert.p12 But uses the new method. PKCS12 certificate in memory is supported by schannel, sectransport (the apple ssl layer) and openssl. Modification from PR #4356 (which add of PKCS12 file for schannel certificate) are merged in this PR. So if #4371 is merged in curl repository, we can close #4356. My other PR (#4346) : to use windows ca store with openssl is NOT included in this PR and must be merged separately.
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