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gnutls_pubkey_get_key_id(3)	    gnutls	   gnutls_pubkey_get_key_id(3)

NAME
       gnutls_pubkey_get_key_id - API function

SYNOPSIS
       #include <gnutls/gnutls.h>

       int  gnutls_pubkey_get_key_id(gnutls_pubkey_t  key, unsigned int flags,
       unsigned char * output_data, size_t * output_data_size);

ARGUMENTS
       gnutls_pubkey_t key
		   Holds the public key

       unsigned int flags
		   should be 0 for now

       unsigned char * output_data
		   will contain the key ID

       size_t * output_data_size
		   holds the size of output_data (and will be replaced by  the
		   actual size of parameters)

DESCRIPTION
       This  function  will  return  a unique ID the depends on the public key
       parameters. This ID can be used in checking whether a certificate  cor‐
       responds to the given public key.

       If  the	buffer	provided  is  not long enough to hold the output, then
       *output_data_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER  will  be
       returned.  The output will normally be a SHA-1 hash output, which is 20
       bytes.

RETURN VALUE
       In case of failure a negative value will be returned, and 0 on success.

REPORTING BUGS
       Report	bugs   to    <bug-gnutls@gnu.org>.     GnuTLS	 home	 page:
       http://www.gnu.org/software/gnutls/  General  help  using GNU software:
       http://www.gnu.org/gethelp/

COPYRIGHT
       Copyright © 2008 Free Software Foundation.
       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.

gnutls				   2.12.6.1	   gnutls_pubkey_get_key_id(3)

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