gnutls_session_get_id

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
       between 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 resumption.
       In server side this function is guaranteed to return a persistent
       identifier of the session since GnuTLS 3.6.4, which may not necessarily
       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 © 2001-2020 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

       https://www.gnutls.org/manual/

gnutls                               3.6.13             gnutls_session_get_id(3)