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/*
* Copyright (C) 2017 Red Hat, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*
*/
#include "gnutls_int.h"
#include "handshake.h"
#include "tls13/early_data.h"
int _gnutls13_send_early_data(gnutls_session_t session)
{
int ret;
if (!(session->security_parameters.entity == GNUTLS_CLIENT &&
session->internals.hsk_flags & HSK_EARLY_DATA_IN_FLIGHT))
return 0;
while (session->internals.early_data_presend_buffer.length > 0) {
ret = gnutls_record_send(
session,
session->internals.early_data_presend_buffer.data,
session->internals.early_data_presend_buffer.length);
if (ret < 0)
return gnutls_assert_val(ret);
session->internals.early_data_presend_buffer.data += ret;
session->internals.early_data_presend_buffer.length -= ret;
}
return 0;
}
int _gnutls13_send_end_of_early_data(gnutls_session_t session, unsigned again)
{
int ret;
mbuffer_st *bufel = NULL;
gnutls_buffer_st buf;
if (!(session->security_parameters.entity == GNUTLS_CLIENT &&
session->internals.hsk_flags & HSK_EARLY_DATA_ACCEPTED))
return 0;
if (session->internals.flags & GNUTLS_NO_END_OF_EARLY_DATA) {
return 0;
}
if (again == 0) {
ret = _gnutls_buffer_init_handshake_mbuffer(&buf);
if (ret < 0)
return gnutls_assert_val(ret);
bufel = _gnutls_buffer_to_mbuffer(&buf);
}
return _gnutls_send_handshake(session, bufel,
GNUTLS_HANDSHAKE_END_OF_EARLY_DATA);
}
int _gnutls13_recv_end_of_early_data(gnutls_session_t session)
{
int ret;
gnutls_buffer_st buf;
_gnutls_buffer_init(&buf);
if (!(session->security_parameters.entity == GNUTLS_SERVER &&
session->internals.hsk_flags & HSK_EARLY_DATA_ACCEPTED))
return 0;
if (!(session->internals.flags & GNUTLS_NO_END_OF_EARLY_DATA)) {
ret = _gnutls_recv_handshake(
session, GNUTLS_HANDSHAKE_END_OF_EARLY_DATA, 0, &buf);
if (ret < 0)
return gnutls_assert_val(ret);
if (buf.length != 0) {
gnutls_assert();
ret = GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER;
goto cleanup;
}
}
session->internals.hsk_flags &= ~HSK_EARLY_DATA_IN_FLIGHT;
ret = 0;
cleanup:
_gnutls_buffer_clear(&buf);
return ret;
}
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