get the X509 certificate of the peer
NULL is returned.
SSL_CTX_set_verify(3)). If an anonymous cipher is used, no certificates are sent.That a certificate is returned does not indicate information about the verification state. Use SSL_get_verify_result(3) to check the verification state.The reference count of the X509 object is incremented by one, so that it will not be destroyed when the session containing the peer certificate is freed. The X509 object must be explicitly freed using X509_free(3).
- No certificate was presented by the peer or no connection was established.
- Pointer to an X509 certificate
- The return value points to the certificate presented by the peer.