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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>(Apologies if a duplicate – I think I mis-sent the first attempt.)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I wrote a TLS server application that runs under Windows and has been working successfully for years. I am currently using OpenSSL 1.1.0f. When I wrote the code I only supported a single CA file for client certificates. I pass the file name in through SSL_CTX_load_verify_locations CAfile and with CApath NULL. Recently I was asked to add support for multiple CA files. I updated my parameter handling to support a CA path, and I can now pass the path instead using SSL_CTX_load_verify_locations CApath.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am using a client certificate that was signed by my “homegrown” CA (which uses the OpenSSL utility). When I point to the CA .PEM with SSL_CTX_load_verify_locations CAfile it works perfectly. When instead I use CApath to point to a folder that contains only that one .PEM file it fails. My verify callback is driven with<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-Error with certificate at depth: 1<o:p></o:p></p><p class=MsoNormal>err 19:self signed certificate in certificate chain<o:p></o:p></p><p class=MsoNormal>error:1417C086:SSL routines:tls_process_client_certificate:certificate verify failed:ssl\statem\statem_srvr.c:2893:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Yes, the CA certificate is a root certificate and is self-signed. But it works as a CAfile. Can someone give me some guidance here?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'>FWIW I specify <span style='font-size:9.5pt;font-family:Consolas;color:#880000'>SSL_CTX_set_verify</span><span style='font-size:9.5pt;font-family:Consolas'>(<span style='color:navy'>sslContext</span>, <span style='color:#A000A0'>SSL_VERIFY_PEER</span>, <span style='color:#880000'>verify_callback</span>);<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><i>Charles</i><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>