gnutls_session_get_id(3) gnutls gnutls_session_get_id(3)
NAME
gnutls_session_get_id - API function
SYNOPSIS
#include <gnutls/gnutls.h>
int gnutls_session_get_id(gnutls_session_t session, void * session_id,
size_t * session_id_size);
ARGUMENTS
gnutls_session_t session
is a gnutls_session_t type.
void * session_id
is a pointer to space to hold the session id.
size_t * session_id_size
initially should contain the maximum session_id size and
will be updated.
DESCRIPTION
Returns the TLS session identifier. The session ID is selected by the
server, and in older versions of TLS was a unique identifier shared be-
tween client and server which was persistent across resumption. In the
latest version of TLS (1.3) or TLS with session tickets, the notion of
session identifiers is undefined and cannot be relied for uniquely
identifying sessions across client and server.
In client side this function returns the identifier returned by the
server, and cannot be assumed to have any relation to session resump-
tion. In server side this function is guaranteed to return a persis-
tent identifier of the session since GnuTLS 3.6.4, which may not neces-
sarily map into the TLS session ID value. Prior to that version the
value could only be considered a persistent identifier, under TLS1.2 or
earlier and when no session tickets were in use.
The session identifier value returned is always less than
GNUTLS_MAX_SESSION_ID_SIZE.
RETURNS
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise an error code
is returned.
REPORTING BUGS
Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org
COPYRIGHT
Copyright © 2001- 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 no-
tice 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
https://www.gnutls.org/manual/
gnutls 3.7.3 gnutls_session_get_id(3)
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