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CentOS 7.0 - man page for gnutls_fingerprint (centos section 3)

gnutls_fingerprint(3)			      gnutls			    gnutls_fingerprint(3)

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  print-
       able.

       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 <bug-gnutls@gnu.org>.
       General guidelines for reporting bugs: http://www.gnu.org/gethelp/
       GnuTLS home page: http://www.gnu.org/software/gnutls/

COPYRIGHT
       Copyright (C) 2012 Free Software Foundation, Inc..
       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	info  and
       gnutls programs are properly installed at your site, the command

	      info gnutls

       should  give you access to the complete manual.	As an alternative you may obtain the man-
       ual from:

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

gnutls					      3.1.15			    gnutls_fingerprint(3)


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