@deftypefun {gnutls_kx_algorithm_t} {gnutls_kx_get} (gnutls_session_t @var{session})

@var{session}: is a @code{gnutls_session_t}  type.

Get the currently used key exchange algorithm.

This function will return @code{GNUTLS_KX_ECDHE_RSA} , or @code{GNUTLS_KX_DHE_RSA} 

under TLS 1.3, to indicate an elliptic curve DH key exchange or

a finite field one. The precise group used is available

by calling @code{gnutls_group_get()}  instead.

@strong{Returns:} the key exchange algorithm used in the last handshake, a

@code{gnutls_kx_algorithm_t}  value.

@end deftypefun