NAME

       gnutls_fingerprint - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

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

ARGUMENTS

       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.

DESCRIPTION

       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.

RETURNS

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

REPORTING BUGS

       Report bugs to <bugs@gnutls.org>.
       Home page: http://www.gnutls.org

COPYRIGHT

       Copyright © 2001-2021 Free Software Foundation, Inc., and others.
       Copying  and distribution of this file, with or without modification, are permitted in any
       medium without royalty provided the copyright notice and this notice are preserved.

SEE ALSO

       The  full  documentation  for  gnutls  is  maintained  as  a  Texinfo  manual.    If   the
       /usr/share/doc/gnutls/ directory does not contain the HTML form visit

       http://www.gnutls.org/manual/