[infiniband] Use "%#lx" as format specifier for queue pair numbers
[ipxe.git] / src / net / 80211 / wpa_psk.c
1 /*
2 * Copyright (c) 2009 Joshua Oreman <oremanj@rwcr.net>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 */
19
20 FILE_LICENCE ( GPL2_OR_LATER );
21
22 #include <string.h>
23 #include <ipxe/net80211.h>
24 #include <ipxe/sha1.h>
25 #include <ipxe/wpa.h>
26 #include <errno.h>
27
28 /** @file
29 *
30 * Frontend for WPA using a pre-shared key.
31 */
32
33 /**
34 * Initialise WPA-PSK state
35 *
36 * @v dev 802.11 device
37 * @ret rc Return status code
38 */
39 static int wpa_psk_init ( struct net80211_device *dev )
40 {
41 return wpa_make_rsn_ie ( dev, &dev->rsn_ie );
42 }
43
44 /**
45 * Start WPA-PSK authentication
46 *
47 * @v dev 802.11 device
48 * @ret rc Return status code
49 */
50 static int wpa_psk_start ( struct net80211_device *dev )
51 {
52 char passphrase[64+1];
53 u8 pmk[WPA_PMK_LEN];
54 int len;
55 struct wpa_common_ctx *ctx = dev->handshaker->priv;
56
57 len = fetch_string_setting ( netdev_settings ( dev->netdev ),
58 &net80211_key_setting, passphrase,
59 64 + 1 );
60
61 if ( len <= 0 ) {
62 DBGC ( ctx, "WPA-PSK %p: no passphrase provided!\n", ctx );
63 net80211_deauthenticate ( dev, -EACCES );
64 return -EACCES;
65 }
66
67 pbkdf2_sha1 ( passphrase, len, dev->essid, strlen ( dev->essid ),
68 4096, pmk, WPA_PMK_LEN );
69
70 DBGC ( ctx, "WPA-PSK %p: derived PMK from passphrase `%s':\n", ctx,
71 passphrase );
72 DBGC_HD ( ctx, pmk, WPA_PMK_LEN );
73
74 return wpa_start ( dev, ctx, pmk, WPA_PMK_LEN );
75 }
76
77 /**
78 * Step WPA-PSK authentication
79 *
80 * @v dev 802.11 device
81 * @ret rc Return status code
82 */
83 static int wpa_psk_step ( struct net80211_device *dev )
84 {
85 struct wpa_common_ctx *ctx = dev->handshaker->priv;
86
87 switch ( ctx->state ) {
88 case WPA_SUCCESS:
89 return 1;
90 case WPA_FAILURE:
91 return -EACCES;
92 default:
93 return 0;
94 }
95 }
96
97 /**
98 * Do-nothing function; you can't change a WPA key post-authentication
99 *
100 * @v dev 802.11 device
101 * @ret rc Return status code
102 */
103 static int wpa_psk_no_change_key ( struct net80211_device *dev __unused )
104 {
105 return 0;
106 }
107
108 /**
109 * Disable handling of received WPA authentication frames
110 *
111 * @v dev 802.11 device
112 */
113 static void wpa_psk_stop ( struct net80211_device *dev )
114 {
115 wpa_stop ( dev );
116 }
117
118 /** WPA-PSK security handshaker */
119 struct net80211_handshaker wpa_psk_handshaker __net80211_handshaker = {
120 .protocol = NET80211_SECPROT_PSK,
121 .init = wpa_psk_init,
122 .start = wpa_psk_start,
123 .step = wpa_psk_step,
124 .change_key = wpa_psk_no_change_key,
125 .stop = wpa_psk_stop,
126 .priv_len = sizeof ( struct wpa_common_ctx ),
127 };