gnutls_fingerprint - calculate the fingerprint of the given data


#include <gnutls/gnutls.h>

int gnutls_fingerprint(gnutls_digest_algorithm_t algo, const gnutls_datum_t * data, void * result, size_t * result_size);


gnutls_digest_algorithm_t algo is a digest algorithm
const gnutls_datum_t * data is the data
void * result is the place where the result will be copied (may be null).
size_t * 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 is not just a hash and cannot be calculated with this function.


On success, GNUTLS_E_SUCCESS (0) is returned, otherwise an error code is returned.


Report bugs to <>.


Copyright © 2008 Free Software Foundation. Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.


The full documentation for gnutls is maintained as a Texinfo manual. If the info and gnutls programs are properly installed at your site, the command
info gnutls
should give you access to the complete manual.

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