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@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
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