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@deftypefun {int} {gnutls_fingerprint} (gnutls_digest_algorithm_t @var{algo}, const gnutls_datum_t * @var{data}, void * @var{result}, size_t * @var{result_size})
@var{algo}: is a digest algorithm
@var{data}: is the data
@var{result}: is the place where the result will be copied (may be null).
@var{result_size}: should hold the size of the result. The actual size
of the returned result will also be copied there.
This function will calculate a fingerprint (actually a hash), of
the given data. The result is not printable data. You should
convert it to hex, or to something else printable.
This is the usual way to calculate a fingerprint of an X.509 DER
encoded certificate. Note however that the fingerprint of an
OpenPGP certificate is not just a hash and cannot be calculated with this
function.
@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned, otherwise
an error code is returned.
@end deftypefun
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