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gnutls_certificate_client_segnutls_certificate_client_set_retrieve_function(3)

NAME
       gnutls_certificate_client_set_retrieve_function	-  Used to set a call‐
       back to retrieve the certificate

SYNOPSIS
       #include <gnutls/gnutls.h>

       void    gnutls_certificate_client_set_retrieve_function(gnutls_certifi‐
       cate_credentials_t  cred, gnutls_certificate_client_retrieve_function *
       func);

ARGUMENTS
       gnutls_certificate_credentials_t cred
		   is a gnutls_certificate_credentials_t structure.

       gnutls_certificate_client_retrieve_function * func
		   is the callback function

DESCRIPTION
       This function sets a callback to be called in  order  to	 retrieve  the
       certificate  to be used in the handshake.  The callback's function pro‐
       totype  is:  int	 (*callback)(gnutls_session_t,	const  gnutls_datum_t*
       req_ca_dn,   int	 nreqs,	 const	gnutls_pk_algorithm_t*	pk_algos,  int
       pk_algos_length, gnutls_retr_st* st);

       req_ca_cert is only used in X.509 certificates.	Contains a  list  with
       the  CA	names  that  the server considers trusted.  Normally we should
       send a certificate that is signed by one of these CAs. These names  are
       DER   encoded.  To  get	a  more	 meaningful  value  use	 the  function
       gnutls_x509_rdn_get().

       pk_algos contains a list with server's acceptable signature algorithms.
       The certificate returned should support the server's given algorithms.

       st should contain the certificates and private keys.

       If  the	callback function is provided then gnutls will call it, in the
       handshake, after the certificate request message has been received.

       The callback function should set the certificate list to be  sent,  and
       return  0 on success. If no certificate was selected then the number of
       certificates should be set to zero. The value (-1) indicates error  and
       the handshake will be terminated.

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			    gnutls_certificate_client_set_retrieve_function(3)

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