NAME

       gnutls_session_get_id2 - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

       int gnutls_session_get_id2(gnutls_session_t session, gnutls_datum_t * session_id);

ARGUMENTS

       gnutls_session_t session
                   is a gnutls_session_t type.

       gnutls_datum_t * session_id
                   will point to the session ID.

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 1.2 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 and should be
       treated as constant.

RETURNS

       On success, GNUTLS_E_SUCCESS (0) is returned, otherwise an error code is returned.

SINCE

       3.1.4

REPORTING BUGS

       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT

       Copyright © 2001-2023 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                                                3.8.3                            gnutls_session_get_id2(3)