pop3_stls.c
3.61 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2001, 2003, 2007, 2010-2012 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 <stdio.h>
#include <string.h>
#include <errno.h>
#include <mailutils/pop3.h>
#include <mailutils/sys/pop3.h>
#include <mailutils/tls.h>
#include <mailutils/list.h>
static int
pop3_get_streams (mu_pop3_t pop3, mu_stream_t *streams)
{
int rc;
if (MU_POP3_FISSET (pop3, MU_POP3_TRACE))
rc = mu_stream_ioctl (pop3->carrier, MU_IOCTL_SUBSTREAM,
MU_IOCTL_OP_GET, streams);
else
{
streams[0] = pop3->carrier;
mu_stream_ref (streams[0]);
streams[1] = pop3->carrier;
mu_stream_ref (streams[1]);
rc = 0;
}
return rc;
}
static int
pop3_set_streams (mu_pop3_t pop3, mu_stream_t *streams)
{
int rc;
if (MU_POP3_FISSET (pop3, MU_POP3_TRACE))
rc = mu_stream_ioctl (pop3->carrier, MU_IOCTL_SUBSTREAM,
MU_IOCTL_OP_SET, streams);
else
{
mu_stream_t tmp;
if (streams[0] == streams[1])
{
tmp = streams[0];
mu_stream_ref (tmp);
mu_stream_ref (tmp);
rc = 0;
}
else
rc = mu_iostream_create (&tmp, streams[0], streams[1]);
if (rc == 0)
{
mu_stream_unref (pop3->carrier);
pop3->carrier = tmp;
}
}
return rc;
}
/*
* STLS
* We have to assume that the caller check the CAPA and TLS was supported.
*/
int
mu_pop3_stls (mu_pop3_t pop3)
{
#ifdef WITH_TLS
int status;
mu_stream_t tlsstream, streams[2];
/* Sanity checks. */
if (pop3 == NULL)
return EINVAL;
switch (pop3->state)
{
case MU_POP3_NO_STATE:
status = mu_pop3_writeline (pop3, "STLS\r\n");
MU_POP3_CHECK_ERROR (pop3, status);
MU_POP3_FCLR (pop3, MU_POP3_ACK);
pop3->state = MU_POP3_STLS;
case MU_POP3_STLS:
status = mu_pop3_response (pop3, NULL);
MU_POP3_CHECK_EAGAIN (pop3, status);
MU_POP3_CHECK_OK (pop3);
pop3->state = MU_POP3_STLS_CONNECT;
case MU_POP3_STLS_CONNECT:
status = pop3_get_streams (pop3, streams);
MU_POP3_CHECK_EAGAIN (pop3, status);
status = mu_tls_client_stream_create (&tlsstream,
streams[0], streams[1], 0);
mu_stream_unref (streams[0]);
mu_stream_unref (streams[1]);
MU_POP3_CHECK_EAGAIN (pop3, status);
streams[0] = streams[1] = tlsstream;
status = pop3_set_streams (pop3, streams);
mu_stream_unref (streams[0]);
mu_stream_unref (streams[1]);
MU_POP3_CHECK_EAGAIN (pop3, status);
/* Invalidate the capability list */
mu_list_destroy (&pop3->capa);
pop3->state = MU_POP3_NO_STATE;
return 0;
/* They must deal with the error first by reopening. */
case MU_POP3_ERROR:
status = ECANCELED;
break;
/* No case in the switch another operation was in progress. */
default:
status = EINPROGRESS;
}
return status;
#else
return ENOTSUP;
#endif
}