@deftypefun {int} {gnutls_x509_ext_import_key_purposes} (const gnutls_datum_t * @var{ext}, gnutls_x509_key_purposes_t @var{p}, unsigned int @var{flags})
@var{ext}: The DER-encoded extension data
@var{p}: The key purposes
@var{flags}: should be zero
This function will extract the key purposes in the provided DER-encoded
ExtKeyUsageSyntax PKIX extension, to a @code{gnutls_x509_key_purposes_t} type.
The data must be initialized.
@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned, otherwise a negative error value.
@strong{Since:} 3.3.0
@end deftypefun