SoapClient and apache strong authentication with openssl certificate

Hello all, I have a question for you. I succeeded on generating certificates, securing apache and connecting to a web service using soap with a certificate authentication mecanism. Now, i'm wondering what the openssl module can do. My wish is to generate a client certificate through the openssl module's functions. But the documentation isn't very useful at the moment. I'm trying to do the exact same thing as : https://gist.github.com/901407starting at the line 8 It looks like : $privkey = openssl_pkey_new(); $privkey = openssl_pkey_new(); $csr = openssl_csr_new($dn, $privkey); $sscert = openssl_csr_sign($csr, file_get_contents('/PATH_TO/ca.crt'), file_get_contents('/PATH_TO/ca.key'), 10000); openssl_x509_export($sscert, $cert); openssl_pkcs12_export($cert, $pkcs12, $privkey, '', array('clcerts', 'nokeys')); And here I'm stuck. Is there a way to do the following command in PHP ? openssl pkcs12 -nodes -clcerts -in cacert.p12 -out client.pem thanks Denis Fingonnet