t_security_level(const SSL_CTX *ctx);
int SSL_get_security_level(const SSL *s);

void SSL_CTX_set_security_callback(SSL_CTX *ctx,
                                   int (*cb)(SSL *s, SSL_CTX *ctx, int op,
                                             int bits, int nid,
                                             void *other, void *ex));

void SSL_set_security_callback(SSL *s, int (*cb)(SSL *s, SSL_CTX *ctx, int op,
                                                 int bits, int nid,
                         