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@deftypefun {int} {gnutls_x509_crt_get_tlsfeatures} (gnutls_x509_crt_t @var{crt}, gnutls_x509_tlsfeatures_t @var{features}, unsigned int @var{flags}, unsigned int * @var{critical})
@var{crt}: A X.509 certificate
@var{features}: If the function succeeds, the
features will be stored in this variable.
@var{flags}: zero or @code{GNUTLS_EXT_FLAG_APPEND}
@var{critical}: the extension status
This function will get the X.509 TLS features
extension structure from the certificate. The
returned structure needs to be freed using
@code{gnutls_x509_tlsfeatures_deinit()} .
When the @code{flags} is set to @code{GNUTLS_EXT_FLAG_APPEND} ,
then if the @code{features} structure is empty this function will behave
identically as if the flag was not set. Otherwise if there are elements
in the @code{features} structure then they will be merged with.
Note that @code{features} must be initialized prior to calling this function.
@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned,
otherwise a negative error value.
@strong{Since:} 3.5.1
@end deftypefun
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