1gnutls_certificate_set_retrieve_funcgtgninuoutntl(ls3s_)certificate_set_retrieve_function(3)
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NAME

6       gnutls_certificate_set_retrieve_function - API function
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SYNOPSIS

9       #include <gnutls/gnutls.h>
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11       void   gnutls_certificate_set_retrieve_function(gnutls_certificate_cre‐
12       dentials_t cred, gnutls_certificate_retrieve_function * func);
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ARGUMENTS

15       gnutls_certificate_credentials_t cred
16                   is a gnutls_certificate_credentials_t structure.
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18       gnutls_certificate_retrieve_function * func
19                   is the callback function
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DESCRIPTION

22       This function sets a callback to be called in  order  to  retrieve  the
23       certificate to be used in the handshake.
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25       The callback's function prototype is: int (*callback)(gnutls_session_t,
26       const  gnutls_datum_t*  req_ca_dn,  int  nreqs,  const  gnutls_pk_algo‐
27       rithm_t* pk_algos, int pk_algos_length, gnutls_retr2_st* st);
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29       req_ca_cert  is  only used in X.509 certificates.  Contains a list with
30       the CA names that the server considers  trusted.   Normally  we  should
31       send  a certificate that is signed by one of these CAs. These names are
32       DER  encoded.  To  get  a  more  meaningful  value  use  the   function
33       gnutls_x509_rdn_get().
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35       pk_algos contains a list with server's acceptable signature algorithms.
36       The certificate returned should support the server's given algorithms.
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38       st should contain the certificates and private keys.
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40       If the callback function is provided then gnutls will call it,  in  the
41       handshake, after the certificate request message has been received.
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43       In server side pk_algos and req_ca_dn are NULL.
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45       The  callback  function should set the certificate list to be sent, and
46       return 0 on success. If no certificate was selected then the number  of
47       certificates  should be set to zero. The value (-1) indicates error and
48       the handshake will be terminated.
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REPORTING BUGS

51       Report   bugs   to    <bug-gnutls@gnu.org>.     GnuTLS    home    page:
52       http://www.gnu.org/software/gnutls/  General  help  using GNU software:
53       http://www.gnu.org/gethelp/
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56       Copyright © 2008 Free Software Foundation.
57       Copying and distribution of this file, with  or  without  modification,
58       are  permitted  in  any  medium  without royalty provided the copyright
59       notice and this notice are preserved.
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SEE ALSO

62       The full documentation for gnutls is maintained as  a  Texinfo  manual.
63       If  the  info  and gnutls programs are properly installed at your site,
64       the command
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66              info gnutls
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68       should give you access to the complete manual.
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72gnutls                             2g.n1u2t.l6s._1certificate_set_retrieve_function(3)
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