gnutls_reauth(3) gnutls gnutls_reauth(3)
NAME
gnutls_reauth - API function
SYNOPSIS
#include <gnutls/gnutls.h>
gnutls_reauth(3) session, unsigned int flags);
ARGUMENTS
gnutls_session_t session
is a gnutls_session_t type.
unsigned int flags
must be zero
DESCRIPTION
This function performs the post-handshake authentication for TLS 1.3.
The post-handshake authentication is initiated by the server by calling
this function. Clients respond when GNUTLS_E_REAUTH_REQUEST has been
seen while receiving data.
The non-fatal errors expected by this function are: GNUTLS_E_INTER-
RUPTED, GNUTLS_E_AGAIN, as well as GNUTLS_E_GOT_APPLICATION_DATA when
called on server side.
The former two interrupt the authentication procedure due to the trans-
port layer being interrupted, and the latter because there were pending
data prior to peer initiating the re-authentication. The server should
read/process that data as unauthenticated and retry calling
gnutls_reauth(3).
When this function is called under TLS1.2 or earlier or the peer didn't
advertise post-handshake auth, it always fails with
GNUTLS_E_INVALID_REQUEST. The verification of the received peers cer-
tificate is delegated to the session or credentials verification call-
backs. A server can check whether post handshake authentication is sup-
ported by the client by checking the session flags with gnutls_ses-
sion_get_flags().
Prior to calling this function in server side, the function gnutls_cer-
tificate_server_set_request() must be called setting expectations for
the received certificate (request or require). If none are set this
function will return with GNUTLS_E_INVALID_REQUEST.
Note that post handshake authentication is available irrespective of
the initial negotiation type (PSK or certificate). In all cases how-
ever, certificate credentials must be set to the session prior to call-
ing this function.
RETURNS
GNUTLS_E_SUCCESS on a successful authentication, otherwise a negative
error code.
REPORTING BUGS
Report bugs to <bugs@gnutls.org>.
Home page: http://www.gnutls.org
COPYRIGHT
Copyright (C) 2001-2018 Free Software Foundation, Inc., and others.
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 3.6.5 gnutls_reauth(3)
gnutls 3.6.5 - Generated Tue Jan 22 15:28:16 CST 2019