gnutls_certificate_client_set_retrieve_function(3)
NAME
gnutls_certificate_client_set_retrieve_function - API function
SYNOPSIS
#include <gnutls/compat.h>
gnutls_certificate_client_set_retrieve_function(3)
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. 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_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 algo-
rithms. 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, if a certificate is requested by the server (and 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 <bugs@gnutls.org>.
Home page: http://www.gnutls.org
COPYRIGHT
Copyright (C) 2001-2013 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 /usr/share/doc/gnutls/ directory does not contain the HTML form
visit
http://www.gnutls.org/manual/
gnutls gnutls_certificate_client_set_retrieve_function(3)
gnutl 3.2.8.1 - Generated Tue Jan 14 06:13:41 CST 2014