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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/* -*-mode:c; c-style:k&r; c-basic-offset:4; -*- */
/* Balsa E-Mail Client
* Copyright (C) 2004 Pawel Salek
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, see <https://www.gnu.org/licenses/>.
*/
/* IMAP login/authentication code, GSSAPI method, see RFC2222 and RFC2078 */
#include "config.h"
#include "imap-auth.h"
#include <glib/gi18n.h>
#if defined(HAVE_GSSAPI)
#if defined(HAVE_HEIMDAL)
#include <gssapi.h>
#else
#include <gssapi/gssapi.h>
#endif
#include "imap_private.h"
#include "siobuf-nc.h"
#include "net-client-utils.h"
static gboolean
imap_gss_auth_init(ImapMboxHandle* handle, NetClientGssCtx *gss_ctx, unsigned *cmdno, GError **error)
{
gint state;
gchar *output_token;
ImapResponse rc;
gboolean result;
state = net_client_gss_auth_step(gss_ctx, NULL, &output_token, error);
if (state >= 0) {
ImapCmdTag tag;
*cmdno = imap_make_tag(tag);
if (imap_mbox_handle_can_do(handle, IMCAP_SASLIR)) {
result = net_client_write_line(NET_CLIENT(handle->sio), "%s AUTHENTICATE GSSAPI %s", error, tag, output_token);
} else {
result = net_client_write_line(NET_CLIENT(handle->sio), "%s AUTHENTICATE GSSAPI", error, tag);
if (result) {
rc = imap_cmd_process_untagged(handle, *cmdno);
if (rc == IMR_RESPOND) {
net_client_siobuf_discard_line(handle->sio, NULL);
result = net_client_write_line(NET_CLIENT(handle->sio), "%s", error, output_token);
} else {
result = FALSE;
}
}
}
g_free(output_token);
} else {
result = FALSE;
}
return result;
}
static gboolean
imap_gss_auth_loop(ImapMboxHandle* handle, NetClientGssCtx *gss_ctx, unsigned cmdno, GError **error)
{
int rc;
gchar *input_token;
gint state = 0;
gboolean result;
do {
rc = imap_cmd_process_untagged(handle, cmdno);
result = FALSE;
if (rc == IMR_RESPOND) {
input_token = net_client_siobuf_get_line(handle->sio, error);
if (input_token != NULL) {
result = TRUE;
}
}
if (result) {
gchar *output_token = NULL;
if (state == 0) {
state = net_client_gss_auth_step(gss_ctx, input_token, &output_token, error);
} else {
output_token = net_client_gss_auth_finish(gss_ctx, input_token, error);
if (output_token == NULL) {
state = -1;
} else {
state = 2;
}
}
g_free(input_token);
if (state >= 0) {
result = net_client_write_line(NET_CLIENT(handle->sio), "%s", NULL, output_token);
}
g_free(output_token);
}
} while (result && (state != 2));
return result && (state == 2);
}
/* imap_auth_gssapi: gssapi support. */
ImapResult
imap_auth_gssapi(ImapMboxHandle* handle)
{
gchar **auth_data;
NetClientGssCtx *gss_ctx;
GError *error = NULL;
ImapResult retval;
if (!imap_mbox_handle_can_do(handle, IMCAP_AGSSAPI)) {
return IMAP_AUTH_UNAVAIL;
}
g_signal_emit_by_name(handle->sio, "auth", NET_CLIENT_AUTH_KERBEROS, &auth_data);
if((auth_data == NULL) || (auth_data[0] == NULL)) {
imap_mbox_handle_set_msg(handle, _("User name required, authentication cancelled"));
g_strfreev(auth_data);
return IMAP_AUTH_CANCELLED;
}
/* try to create the context */
gss_ctx = net_client_gss_ctx_new("imap", handle->host, auth_data[0], &error);
if (gss_ctx == NULL) {
retval = IMAP_AUTH_UNAVAIL;
} else {
gboolean result;
unsigned cmdno;
int rc;
result = imap_gss_auth_init(handle, gss_ctx, &cmdno, &error);
if (result) {
result = imap_gss_auth_loop(handle, gss_ctx, cmdno, &error);
if (!result) {
/* cancel the auth process */
(void) net_client_write_line(NET_CLIENT(handle->sio), "*", NULL);
}
rc = imap_cmd_process_untagged(handle, cmdno);
} else {
rc = IMR_BAD;
}
net_client_gss_ctx_free(gss_ctx);
retval = (result && (rc == IMR_OK)) ? IMAP_SUCCESS : IMAP_AUTH_UNAVAIL;
}
g_strfreev(auth_data);
if (error != NULL) {
imap_mbox_handle_set_msg(handle, _("GSSAPI authentication failed: %s"), error->message);
g_error_free(error);
}
return retval;
}
#else /* defined(HAVE_GSSAPI) */
ImapResult
imap_auth_gssapi(ImapMboxHandle* handle)
{ return IMAP_AUTH_UNAVAIL; }
#endif /* defined(HAVE_GSSAPI) */
|
