starttls.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2003, 2007-2012, 2014 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#include "imap4d.h"
int tls_available;
#ifdef WITH_TLS
static int tls_done;
/*
6.2.1. STARTTLS Command
Arguments: none
Responses: no specific response for this command
Result: OK - starttls completed, begin TLS negotiation
BAD - command unknown or arguments invalid
*/
int
imap4d_starttls (struct imap4d_session *session,
struct imap4d_command *command, imap4d_tokbuf_t tok)
{
int status;
if (!tls_available || tls_done)
return io_completion_response (command, RESP_BAD, "Invalid command");
if (imap4d_tokbuf_argc (tok) != 2)
return io_completion_response (command, RESP_BAD, "Invalid arguments");
util_atexit (mu_deinit_tls_libs);
status = io_completion_response (command, RESP_OK, "Begin TLS negotiation");
io_flush ();
if (imap4d_init_tls_server () == 0)
tls_encryption_on (session);
else
{
mu_diag_output (MU_DIAG_ERROR, _("session terminated"));
util_bye ();
exit (EX_OK);
}
return status;
}
void
tls_encryption_on (struct imap4d_session *session)
{
tls_done = 1;
imap4d_capability_remove (IMAP_CAPA_STARTTLS);
login_disabled = 0;
imap4d_capability_remove (IMAP_CAPA_LOGINDISABLED);
session->tls_mode = tls_no;
imap4d_capability_remove (IMAP_CAPA_XTLSREQUIRED);
}
void
starttls_init ()
{
tls_available = mu_check_tls_environment ();
if (tls_available)
tls_available = mu_init_tls_libs (1);
if (tls_available)
imap4d_capability_add (IMAP_CAPA_STARTTLS);
}
#endif /* WITH_TLS */
/* EOF */