centos man page for gnutls_certificate_set_retrieve_function

gnutls_certificate_set_retrieve_function(3)			      gnutls			       gnutls_certificate_set_retrieve_function(3)

NAME
       gnutls_certificate_set_retrieve_function - API function

SYNOPSIS
       #include <gnutls/gnutls.h>

       void gnutls_certificate_set_retrieve_function(gnutls_certificate_credentials_t cred, gnutls_certificate_retrieve_function * func);

ARGUMENTS
       gnutls_certificate_credentials_t cred
		   is a gnutls_certificate_credentials_t structure.

       gnutls_certificate_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. You are advised to use
       gnutls_certificate_set_retrieve_function2() because it is much more efficient in the processing it requires from gnutls.

       The callback's function prototype is: int (*callback)(gnutls_session_t, const gnutls_datum_t* req_ca_dn, int nreqs,  const  gnutls_pk_algo-
       rithm_t* pk_algos, int pk_algos_length, gnutls_retr2_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 algo-
       rithms.

	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.

       In server side pk_algos and req_ca_dn are NULL.

       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.

SINCE
       3.0

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 manual from:

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

gnutls								      3.1.15			       gnutls_certificate_set_retrieve_function(3)