Merge from vendor branch GCC:
[dragonfly.git] / contrib / wpa_supplicant-0.5.8 / eap_otp.c
1 /*
2  * EAP peer method: EAP-OTP (RFC 3748)
3  * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * Alternatively, this software may be distributed under the terms of BSD
10  * license.
11  *
12  * See README and COPYING for more details.
13  */
14
15 #include "includes.h"
16
17 #include "common.h"
18 #include "eap_i.h"
19 #include "config_ssid.h"
20
21
22 static void * eap_otp_init(struct eap_sm *sm)
23 {
24         /* No need for private data. However, must return non-NULL to indicate
25          * success. */
26         return (void *) 1;
27 }
28
29
30 static void eap_otp_deinit(struct eap_sm *sm, void *priv)
31 {
32 }
33
34
35 static u8 * eap_otp_process(struct eap_sm *sm, void *priv,
36                             struct eap_method_ret *ret,
37                             const u8 *reqData, size_t reqDataLen,
38                             size_t *respDataLen)
39 {
40         const struct eap_hdr *req;
41         struct eap_hdr *resp;
42         const u8 *pos, *password;
43         u8 *rpos;
44         size_t password_len, len;
45         int otp;
46
47         pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_OTP,
48                                reqData, reqDataLen, &len);
49         if (pos == NULL) {
50                 ret->ignore = TRUE;
51                 return NULL;
52         }
53         req = (const struct eap_hdr *) reqData;
54         wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-OTP: Request message",
55                           pos, len);
56
57         password = eap_get_config_otp(sm, &password_len);
58         if (password)
59                 otp = 1;
60         else {
61                 password = eap_get_config_password(sm, &password_len);
62                 otp = 0;
63         }
64
65         if (password == NULL) {
66                 wpa_printf(MSG_INFO, "EAP-OTP: Password not configured");
67                 eap_sm_request_otp(sm, (const char *) pos, len);
68                 ret->ignore = TRUE;
69                 return NULL;
70         }
71
72         ret->ignore = FALSE;
73
74         ret->methodState = METHOD_DONE;
75         ret->decision = DECISION_COND_SUCC;
76         ret->allowNotifications = FALSE;
77
78         resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_OTP, respDataLen,
79                              password_len, EAP_CODE_RESPONSE, req->identifier,
80                              &rpos);
81         if (resp == NULL)
82                 return NULL;
83         os_memcpy(rpos, password, password_len);
84         wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-OTP: Response",
85                               password, password_len);
86
87         if (otp) {
88                 wpa_printf(MSG_DEBUG, "EAP-OTP: Forgetting used password");
89                 eap_clear_config_otp(sm);
90         }
91
92         return (u8 *) resp;
93 }
94
95
96 int eap_peer_otp_register(void)
97 {
98         struct eap_method *eap;
99         int ret;
100
101         eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
102                                     EAP_VENDOR_IETF, EAP_TYPE_OTP, "OTP");
103         if (eap == NULL)
104                 return -1;
105
106         eap->init = eap_otp_init;
107         eap->deinit = eap_otp_deinit;
108         eap->process = eap_otp_process;
109
110         ret = eap_peer_method_register(eap);
111         if (ret)
112                 eap_peer_method_free(eap);
113         return ret;
114 }