SSL_get_peer_certificate
peer = SSL_get_peer_certificate(s);
peer = SSL_get_peer_certificate(con);
peer = SSL_get_peer_certificate(con);
X509 * SSL_get_peer_certificate(const SSL *s);
ctx->ssl_peer_cert = SSL_get_peer_certificate(ctx->ssl_conn);
cert = SSL_get_peer_certificate(ctx->ssl_conn);
ocsp->main_cert = SSL_get_peer_certificate(ctx->ssl_conn);
conn->ssl_cert = SSL_get_peer_certificate(conn->ssl);
cert = SSL_get_peer_certificate(config.ssl);