cURL with SSL certificates fails: error 58 unable to set private key file
certificate, curl, php, ssl
Solution
I've fixed this problem. I think, due to the number of questions regarding this issue and number of different solutions, others will benefit from the solution. Here goes:
I used the `openssl` CLI program to convert the .p12 key-file to a .pem key-file. The trick is the way the conversion takes place.
First I converted it with this command and I had the issue as described in the question:
`openssl pkcs12 -in key.p12 -out key.pem -nodes -clcerts`
While the command below did the actual trick:
`openssl pkcs12 -in key.p12 -out key.pem -clcerts`
For more info please see the source I used: https://community.qualys.com/docs/DOC-3273
Problem
I'm trying to connect to a remote host using cURL. The connection requires the use of a certificate and a private key which is password protected. So far I'm unsuccessful with this code below: ``` <?php $wsdl = 'https://domain.com/?wsdl'; $certFile = getcwd() . '/auth/cert.pem'; $keyFile = getcwd() . '/auth/key.pem'; $password = 'pwd'; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $wsdl); curl_setopt($ch, CURLOPT_SSLCERT, $certFile); curl_setopt($ch, CURLOPT_SSLKEYPASSWD, $password); curl_setopt($ch, CURLOPT_SSLKEY, $keyFile); #curl_setopt($ch, CURLOPT_FRESH_CONNECT, true); #curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); #curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); $output = curl_exec($ch); var_dump(curl_errno($ch)); var_dump(curl_error($ch)); ``` The result I keep getting is error `58`: `unable to set private key file: '/home/.../domains/.../public_html/auth/key.pem' type PEM`. Things I've tried so far: - Check if the key-file is readable as suggested here: Unable to use libcurl to access a site requiring client authentication. Trying to pass the file through `openssl_private_key()` gives me a resource, and not a boolean. So this seems good. - Switch the order of the content in the key.pem file as suggested here: Unable to use libcurl to access a site requiring client authentication. No luck so far. - Played around with some other options like `SLL_VERIFY_PEER`, `SSL_VERIFY_HOST`, `SSL_CERTTYPE` and other options which seemed trivial regarding the official PHP-docs. No luck so far. I'm pretty sure the problem lies somehwere in my configuration, but I'm not sure where to look.