NAME

       gnutls_x509_crt_get_fingerprint - API function

SYNOPSIS

       #include <gnutls/x509.h>

       int   gnutls_x509_crt_get_fingerprint(gnutls_x509_crt_t   cert,  gnutls_digest_algorithm_t
       algo, void * buf, size_t * buf_size);

ARGUMENTS

       gnutls_x509_crt_t cert
                   should contain a gnutls_x509_crt_t type

       gnutls_digest_algorithm_t algo
                   is a digest algorithm

       void * buf  a pointer to a structure to hold the fingerprint (may be null)

       size_t * buf_size
                   initially holds the size of  buf

DESCRIPTION

       This function will calculate and  copy  the  certificate's  fingerprint  in  the  provided
       buffer. The fingerprint is a hash of the DER-encoded data of the certificate.

       If the buffer is null then only the size will be filled.

RETURNS

       GNUTLS_E_SHORT_MEMORY_BUFFER  if  the provided buffer is not long enough, and in that case
       the *buf_size will be updated with the required size.  On success 0 is returned.

REPORTING BUGS

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

COPYRIGHT

       Copyright © 2001-2023 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

       https://www.gnutls.org/manual/