pop3_stls.c
3.09 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2003, 2007, 2010 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, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA */
#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_swap_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_SWAP_STREAM, streams);
else if (streams[0] != streams[1])
rc = EINVAL;
else
{
mu_stream_t str = streams[0];
streams[0] = streams[1] = pop3->carrier;
pop3->carrier = str;
rc = 0;
}
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:
streams[0] = streams[1] = NULL;
status = pop3_swap_streams (pop3, streams);
MU_POP3_CHECK_EAGAIN (pop3, status);
status = mu_tls_client_stream_create (&tlsstream,
streams[0], streams[1], 0);
MU_POP3_CHECK_EAGAIN (pop3, status);
status = mu_stream_open (tlsstream);
MU_POP3_CHECK_EAGAIN (pop3, status);
streams[0] = streams[1] = tlsstream;
status = pop3_swap_streams (pop3, streams);
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
}