starttls.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2010-2012, 2014-2017 Free Software Foundation, Inc.
This library 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 3 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 library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <mailutils/errno.h>
#include <mailutils/stream.h>
#include <mailutils/tls.h>
#include <mailutils/imap.h>
#include <mailutils/sys/imap.h>
int
mu_imap_starttls (mu_imap_t imap)
{
#ifdef WITH_TLS
int status;
mu_stream_t tlsstream, streams[2];
if (imap == NULL)
return EINVAL;
if (!imap->io)
return MU_ERR_NO_TRANSPORT;
if (imap->session_state == MU_IMAP_SESSION_INIT)
return MU_ERR_SEQ;
status = mu_imap_capability_test (imap, "STARTTLS", NULL);
if (status == MU_ERR_NOENT)
return ENOSYS;
else if (status)
return status;
switch (imap->client_state)
{
case MU_IMAP_CLIENT_READY:
status = _mu_imap_tag_next (imap);
MU_IMAP_CHECK_EAGAIN (imap, status);
status = mu_imapio_printf (imap->io, "%s STARTTLS\r\n", imap->tag_str);
MU_IMAP_CHECK_ERROR (imap, status);
MU_IMAP_FCLR (imap, MU_IMAP_RESP);
imap->client_state = MU_IMAP_CLIENT_STARTTLS_RX;
case MU_IMAP_CLIENT_STARTTLS_RX:
status = _mu_imap_response (imap, NULL, NULL);
MU_IMAP_CHECK_EAGAIN (imap, status);
switch (imap->response)
{
case MU_IMAP_OK:
status = mu_imapio_get_streams (imap->io, streams);
MU_IMAP_CHECK_EAGAIN (imap, status);
status = mu_tls_client_stream_create (&tlsstream,
streams[0], streams[1], 0);
mu_stream_unref (streams[0]);
mu_stream_unref (streams[1]);
MU_IMAP_CHECK_EAGAIN (imap, status);
streams[0] = streams[1] = tlsstream;
status = mu_imapio_set_streams (imap->io, streams);
mu_stream_unref (streams[0]);
mu_stream_unref (streams[1]);
MU_IMAP_CHECK_EAGAIN (imap, status);
/* Invalidate the capability list */
mu_list_destroy (&imap->capa);
status = 0;
break;
case MU_IMAP_NO:
status = MU_ERR_FAILURE;
break;
case MU_IMAP_BAD:
status = MU_ERR_BADREPLY;
break;
}
imap->client_state = MU_IMAP_CLIENT_READY;
break;
default:
status = EINPROGRESS;
}
return status;
#else
return ENOSYS;
#endif
}