SSL_get_extms_support - extended master secret support
#include <openssl/ssl.h>
int SSL_get_extms_support(SSL *ssl);SSL_get_extms_support() indicates whether the current session used extended master secret.
This function is implemented as a macro.
SSL_get_extms_support() returns 1 if the current session used extended master secret, 0 if it did not and -1 if a handshake is currently in progress i.e. it is not possible to determine if extended master secret was used.