How to load a PKCS#12 file in OpenSSL programmatically?

Question

In an SSL Server Application based on OpenSSL, how can we load a PKCS#12 file programmatically?

Also, can I load a PKCS#12 file having Certificate, Key & CAs in

Answer 1

Be warned that the code writes the certs out as trusted certificates (encrypted). If you want unencrypted certificates, change the calls to PEM_write_X509_AUX() to PEM_write_X509().