2007-07-11 15:48:36 +00:00
|
|
|
/*
|
2008-03-24 19:46:53 +00:00
|
|
|
* EAP peer method: EAP-GPSK (draft-ietf-emu-eap-gpsk-08.txt)
|
2007-07-11 15:48:36 +00:00
|
|
|
* Copyright (c) 2006-2007, Jouni Malinen <j@w1.fi>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* Alternatively, this software may be distributed under the terms of BSD
|
|
|
|
* license.
|
|
|
|
*
|
|
|
|
* See README and COPYING for more details.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "includes.h"
|
|
|
|
|
|
|
|
#include "common.h"
|
|
|
|
#include "eap_i.h"
|
|
|
|
#include "config_ssid.h"
|
|
|
|
#include "eap_gpsk_common.h"
|
|
|
|
|
|
|
|
struct eap_gpsk_data {
|
|
|
|
enum { GPSK_1, GPSK_3, SUCCESS, FAILURE } state;
|
|
|
|
u8 rand_server[EAP_GPSK_RAND_LEN];
|
2008-03-24 19:46:53 +00:00
|
|
|
u8 rand_peer[EAP_GPSK_RAND_LEN];
|
2007-07-11 15:48:36 +00:00
|
|
|
u8 msk[EAP_MSK_LEN];
|
|
|
|
u8 emsk[EAP_EMSK_LEN];
|
|
|
|
u8 sk[EAP_GPSK_MAX_SK_LEN];
|
|
|
|
size_t sk_len;
|
|
|
|
u8 pk[EAP_GPSK_MAX_PK_LEN];
|
|
|
|
size_t pk_len;
|
|
|
|
u8 session_id;
|
|
|
|
int session_id_set;
|
2008-03-24 19:46:53 +00:00
|
|
|
u8 *id_peer;
|
|
|
|
size_t id_peer_len;
|
2007-07-11 15:48:36 +00:00
|
|
|
u8 *id_server;
|
|
|
|
size_t id_server_len;
|
|
|
|
int vendor; /* CSuite/Specifier */
|
|
|
|
int specifier; /* CSuite/Specifier */
|
|
|
|
u8 *psk;
|
|
|
|
size_t psk_len;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
static u8 * eap_gpsk_send_gpsk_2(struct eap_gpsk_data *data, u8 identifier,
|
|
|
|
const u8 *csuite_list, size_t csuite_list_len,
|
|
|
|
size_t *respDataLen);
|
|
|
|
static u8 * eap_gpsk_send_gpsk_4(struct eap_gpsk_data *data, u8 identifier,
|
|
|
|
size_t *respDataLen);
|
|
|
|
|
|
|
|
|
2007-07-11 15:48:36 +00:00
|
|
|
#ifndef CONFIG_NO_STDOUT_DEBUG
|
|
|
|
static const char * eap_gpsk_state_txt(int state)
|
|
|
|
{
|
|
|
|
switch (state) {
|
|
|
|
case GPSK_1:
|
|
|
|
return "GPSK-1";
|
|
|
|
case GPSK_3:
|
|
|
|
return "GPSK-3";
|
|
|
|
case SUCCESS:
|
|
|
|
return "SUCCESS";
|
|
|
|
case FAILURE:
|
|
|
|
return "FAILURE";
|
|
|
|
default:
|
|
|
|
return "?";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_NO_STDOUT_DEBUG */
|
|
|
|
|
|
|
|
|
|
|
|
static void eap_gpsk_state(struct eap_gpsk_data *data, int state)
|
|
|
|
{
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: %s -> %s",
|
|
|
|
eap_gpsk_state_txt(data->state),
|
|
|
|
eap_gpsk_state_txt(state));
|
|
|
|
data->state = state;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void eap_gpsk_deinit(struct eap_sm *sm, void *priv);
|
|
|
|
|
|
|
|
|
|
|
|
static void * eap_gpsk_init(struct eap_sm *sm)
|
|
|
|
{
|
|
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
|
|
struct eap_gpsk_data *data;
|
|
|
|
|
|
|
|
if (config == NULL) {
|
|
|
|
wpa_printf(MSG_INFO, "EAP-GPSK: No configuration found");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (config->eappsk == NULL) {
|
|
|
|
wpa_printf(MSG_INFO, "EAP-GPSK: No key (eappsk) configured");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
data = os_zalloc(sizeof(*data));
|
|
|
|
if (data == NULL)
|
|
|
|
return NULL;
|
|
|
|
data->state = GPSK_1;
|
|
|
|
|
|
|
|
if (config->nai) {
|
2008-03-24 19:46:53 +00:00
|
|
|
data->id_peer = os_malloc(config->nai_len);
|
|
|
|
if (data->id_peer == NULL) {
|
2007-07-11 15:48:36 +00:00
|
|
|
eap_gpsk_deinit(sm, data);
|
|
|
|
return NULL;
|
|
|
|
}
|
2008-03-24 19:46:53 +00:00
|
|
|
os_memcpy(data->id_peer, config->nai, config->nai_len);
|
|
|
|
data->id_peer_len = config->nai_len;
|
2007-07-11 15:48:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
data->psk = os_malloc(config->eappsk_len);
|
|
|
|
if (data->psk == NULL) {
|
|
|
|
eap_gpsk_deinit(sm, data);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
os_memcpy(data->psk, config->eappsk, config->eappsk_len);
|
|
|
|
data->psk_len = config->eappsk_len;
|
|
|
|
|
|
|
|
return data;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void eap_gpsk_deinit(struct eap_sm *sm, void *priv)
|
|
|
|
{
|
|
|
|
struct eap_gpsk_data *data = priv;
|
|
|
|
os_free(data->id_server);
|
2008-03-24 19:46:53 +00:00
|
|
|
os_free(data->id_peer);
|
2007-07-11 15:48:36 +00:00
|
|
|
os_free(data->psk);
|
|
|
|
os_free(data);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
const u8 * eap_gpsk_process_id_server(struct eap_gpsk_data *data,
|
|
|
|
const u8 *pos, const u8 *end)
|
2007-07-11 15:48:36 +00:00
|
|
|
{
|
|
|
|
u16 alen;
|
|
|
|
|
|
|
|
if (end - pos < 2) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short GPSK-1 packet");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
alen = WPA_GET_BE16(pos);
|
|
|
|
pos += 2;
|
|
|
|
if (end - pos < alen) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: ID_Server overflow");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
os_free(data->id_server);
|
|
|
|
data->id_server = os_malloc(alen);
|
|
|
|
if (data->id_server == NULL) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: No memory for ID_Server");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
os_memcpy(data->id_server, pos, alen);
|
|
|
|
data->id_server_len = alen;
|
|
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Server",
|
|
|
|
data->id_server, data->id_server_len);
|
|
|
|
pos += alen;
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
const u8 * eap_gpsk_process_rand_server(struct eap_gpsk_data *data,
|
|
|
|
const u8 *pos, const u8 *end)
|
|
|
|
{
|
|
|
|
if (pos == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
2007-07-11 15:48:36 +00:00
|
|
|
if (end - pos < EAP_GPSK_RAND_LEN) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: RAND_Server overflow");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
os_memcpy(data->rand_server, pos, EAP_GPSK_RAND_LEN);
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server",
|
|
|
|
data->rand_server, EAP_GPSK_RAND_LEN);
|
|
|
|
pos += EAP_GPSK_RAND_LEN;
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int eap_gpsk_select_csuite(struct eap_sm *sm,
|
|
|
|
struct eap_gpsk_data *data,
|
|
|
|
const u8 *csuite_list,
|
|
|
|
size_t csuite_list_len)
|
|
|
|
{
|
|
|
|
struct eap_gpsk_csuite *csuite;
|
|
|
|
int i, count;
|
2007-07-11 15:48:36 +00:00
|
|
|
|
|
|
|
count = csuite_list_len / sizeof(struct eap_gpsk_csuite);
|
|
|
|
data->vendor = EAP_GPSK_VENDOR_IETF;
|
|
|
|
data->specifier = EAP_GPSK_CIPHER_RESERVED;
|
|
|
|
csuite = (struct eap_gpsk_csuite *) csuite_list;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
|
|
int vendor, specifier;
|
2008-03-24 19:46:53 +00:00
|
|
|
vendor = WPA_GET_BE32(csuite->vendor);
|
|
|
|
specifier = WPA_GET_BE16(csuite->specifier);
|
2007-07-11 15:48:36 +00:00
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite[%d]: %d:%d",
|
|
|
|
i, vendor, specifier);
|
|
|
|
if (data->vendor == EAP_GPSK_VENDOR_IETF &&
|
|
|
|
data->specifier == EAP_GPSK_CIPHER_RESERVED &&
|
|
|
|
eap_gpsk_supported_ciphersuite(vendor, specifier)) {
|
|
|
|
data->vendor = vendor;
|
|
|
|
data->specifier = specifier;
|
|
|
|
}
|
|
|
|
csuite++;
|
|
|
|
}
|
|
|
|
if (data->vendor == EAP_GPSK_VENDOR_IETF &&
|
|
|
|
data->specifier == EAP_GPSK_CIPHER_RESERVED) {
|
|
|
|
wpa_msg(sm->msg_ctx, MSG_INFO, "EAP-GPSK: No supported "
|
|
|
|
"ciphersuite found");
|
2008-03-24 19:46:53 +00:00
|
|
|
return -1;
|
2007-07-11 15:48:36 +00:00
|
|
|
}
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Selected ciphersuite %d:%d",
|
|
|
|
data->vendor, data->specifier);
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
const u8 * eap_gpsk_process_csuite_list(struct eap_sm *sm,
|
|
|
|
struct eap_gpsk_data *data,
|
|
|
|
const u8 **list, size_t *list_len,
|
|
|
|
const u8 *pos, const u8 *end)
|
|
|
|
{
|
|
|
|
if (pos == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (end - pos < 2) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Too short GPSK-1 packet");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
*list_len = WPA_GET_BE16(pos);
|
|
|
|
pos += 2;
|
|
|
|
if (end - pos < (int) *list_len) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_List overflow");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
if (*list_len == 0 || (*list_len % sizeof(struct eap_gpsk_csuite))) {
|
2009-01-15 04:25:21 +00:00
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Invalid CSuite_List len %lu",
|
|
|
|
(unsigned long) *list_len);
|
2008-03-24 19:46:53 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
*list = pos;
|
|
|
|
pos += *list_len;
|
|
|
|
|
|
|
|
if (eap_gpsk_select_csuite(sm, data, *list, *list_len) < 0)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static u8 * eap_gpsk_process_gpsk_1(struct eap_sm *sm,
|
|
|
|
struct eap_gpsk_data *data,
|
|
|
|
struct eap_method_ret *ret,
|
|
|
|
const u8 *reqData, size_t reqDataLen,
|
|
|
|
const u8 *payload, size_t payload_len,
|
|
|
|
size_t *respDataLen)
|
|
|
|
{
|
|
|
|
size_t csuite_list_len;
|
|
|
|
const u8 *csuite_list, *pos, *end;
|
|
|
|
const struct eap_hdr *req;
|
|
|
|
u8 *resp;
|
|
|
|
|
|
|
|
if (data->state != GPSK_1) {
|
|
|
|
ret->ignore = TRUE;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Request/GPSK-1");
|
|
|
|
|
|
|
|
end = payload + payload_len;
|
|
|
|
|
|
|
|
pos = eap_gpsk_process_id_server(data, payload, end);
|
|
|
|
pos = eap_gpsk_process_rand_server(data, pos, end);
|
|
|
|
pos = eap_gpsk_process_csuite_list(sm, data, &csuite_list,
|
|
|
|
&csuite_list_len, pos, end);
|
|
|
|
if (pos == NULL) {
|
|
|
|
eap_gpsk_state(data, FAILURE);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
req = (const struct eap_hdr *) reqData;
|
|
|
|
resp = eap_gpsk_send_gpsk_2(data, req->identifier,
|
|
|
|
csuite_list, csuite_list_len,
|
|
|
|
respDataLen);
|
|
|
|
if (resp == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
eap_gpsk_state(data, GPSK_3);
|
|
|
|
|
|
|
|
return (u8 *) resp;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static u8 * eap_gpsk_send_gpsk_2(struct eap_gpsk_data *data, u8 identifier,
|
|
|
|
const u8 *csuite_list, size_t csuite_list_len,
|
|
|
|
size_t *respDataLen)
|
|
|
|
{
|
|
|
|
struct eap_hdr *resp;
|
|
|
|
size_t len, miclen;
|
|
|
|
u8 *rpos, *start;
|
|
|
|
struct eap_gpsk_csuite *csuite;
|
|
|
|
|
2007-07-11 15:48:36 +00:00
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Sending Response/GPSK-2");
|
|
|
|
|
|
|
|
miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
|
2008-03-24 19:46:53 +00:00
|
|
|
len = 1 + 2 + data->id_peer_len + 2 + data->id_server_len +
|
2007-07-11 15:48:36 +00:00
|
|
|
2 * EAP_GPSK_RAND_LEN + 2 + csuite_list_len +
|
|
|
|
sizeof(struct eap_gpsk_csuite) + 2 + miclen;
|
|
|
|
|
|
|
|
resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respDataLen, len,
|
2008-03-24 19:46:53 +00:00
|
|
|
EAP_CODE_RESPONSE, identifier, &rpos);
|
2007-07-11 15:48:36 +00:00
|
|
|
if (resp == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
*rpos++ = EAP_GPSK_OPCODE_GPSK_2;
|
|
|
|
start = rpos;
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Peer",
|
|
|
|
data->id_peer, data->id_peer_len);
|
|
|
|
WPA_PUT_BE16(rpos, data->id_peer_len);
|
2007-07-11 15:48:36 +00:00
|
|
|
rpos += 2;
|
2008-03-24 19:46:53 +00:00
|
|
|
if (data->id_peer)
|
|
|
|
os_memcpy(rpos, data->id_peer, data->id_peer_len);
|
|
|
|
rpos += data->id_peer_len;
|
2007-07-11 15:48:36 +00:00
|
|
|
|
|
|
|
WPA_PUT_BE16(rpos, data->id_server_len);
|
|
|
|
rpos += 2;
|
|
|
|
if (data->id_server)
|
|
|
|
os_memcpy(rpos, data->id_server, data->id_server_len);
|
|
|
|
rpos += data->id_server_len;
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
if (os_get_random(data->rand_peer, EAP_GPSK_RAND_LEN)) {
|
2007-07-11 15:48:36 +00:00
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to get random data "
|
2008-03-24 19:46:53 +00:00
|
|
|
"for RAND_Peer");
|
2007-07-11 15:48:36 +00:00
|
|
|
eap_gpsk_state(data, FAILURE);
|
|
|
|
os_free(resp);
|
|
|
|
return NULL;
|
|
|
|
}
|
2008-03-24 19:46:53 +00:00
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Peer",
|
|
|
|
data->rand_peer, EAP_GPSK_RAND_LEN);
|
|
|
|
os_memcpy(rpos, data->rand_peer, EAP_GPSK_RAND_LEN);
|
2007-07-11 15:48:36 +00:00
|
|
|
rpos += EAP_GPSK_RAND_LEN;
|
|
|
|
|
|
|
|
os_memcpy(rpos, data->rand_server, EAP_GPSK_RAND_LEN);
|
|
|
|
rpos += EAP_GPSK_RAND_LEN;
|
|
|
|
|
|
|
|
WPA_PUT_BE16(rpos, csuite_list_len);
|
|
|
|
rpos += 2;
|
|
|
|
os_memcpy(rpos, csuite_list, csuite_list_len);
|
|
|
|
rpos += csuite_list_len;
|
|
|
|
|
|
|
|
csuite = (struct eap_gpsk_csuite *) rpos;
|
2008-03-24 19:46:53 +00:00
|
|
|
WPA_PUT_BE32(csuite->vendor, data->vendor);
|
|
|
|
WPA_PUT_BE16(csuite->specifier, data->specifier);
|
2007-07-11 15:48:36 +00:00
|
|
|
rpos = (u8 *) (csuite + 1);
|
|
|
|
|
|
|
|
if (eap_gpsk_derive_keys(data->psk, data->psk_len,
|
|
|
|
data->vendor, data->specifier,
|
2008-03-24 19:46:53 +00:00
|
|
|
data->rand_peer, data->rand_server,
|
|
|
|
data->id_peer, data->id_peer_len,
|
2007-07-11 15:48:36 +00:00
|
|
|
data->id_server, data->id_server_len,
|
|
|
|
data->msk, data->emsk,
|
|
|
|
data->sk, &data->sk_len,
|
|
|
|
data->pk, &data->pk_len) < 0) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to derive keys");
|
|
|
|
eap_gpsk_state(data, FAILURE);
|
|
|
|
os_free(resp);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* No PD_Payload_1 */
|
|
|
|
WPA_PUT_BE16(rpos, 0);
|
|
|
|
rpos += 2;
|
|
|
|
|
|
|
|
if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
|
|
|
|
data->specifier, start, rpos - start, rpos) <
|
|
|
|
0) {
|
|
|
|
eap_gpsk_state(data, FAILURE);
|
|
|
|
os_free(resp);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return (u8 *) resp;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
const u8 * eap_gpsk_validate_rand(struct eap_gpsk_data *data, const u8 *pos,
|
|
|
|
const u8 *end)
|
2007-07-11 15:48:36 +00:00
|
|
|
{
|
|
|
|
if (end - pos < EAP_GPSK_RAND_LEN) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for "
|
2008-03-24 19:46:53 +00:00
|
|
|
"RAND_Peer");
|
2007-07-11 15:48:36 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
2008-03-24 19:46:53 +00:00
|
|
|
if (os_memcmp(pos, data->rand_peer, EAP_GPSK_RAND_LEN) != 0) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: RAND_Peer in GPSK-2 and "
|
2007-07-11 15:48:36 +00:00
|
|
|
"GPSK-3 did not match");
|
2008-03-24 19:46:53 +00:00
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Peer in GPSK-2",
|
|
|
|
data->rand_peer, EAP_GPSK_RAND_LEN);
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Peer in GPSK-3",
|
2007-07-11 15:48:36 +00:00
|
|
|
pos, EAP_GPSK_RAND_LEN);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
pos += EAP_GPSK_RAND_LEN;
|
|
|
|
|
|
|
|
if (end - pos < EAP_GPSK_RAND_LEN) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for "
|
|
|
|
"RAND_Server");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
if (os_memcmp(pos, data->rand_server, EAP_GPSK_RAND_LEN) != 0) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-1 and "
|
|
|
|
"GPSK-3 did not match");
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-1",
|
|
|
|
data->rand_server, EAP_GPSK_RAND_LEN);
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: RAND_Server in GPSK-3",
|
|
|
|
pos, EAP_GPSK_RAND_LEN);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
pos += EAP_GPSK_RAND_LEN;
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
const u8 * eap_gpsk_validate_id_server(struct eap_gpsk_data *data,
|
|
|
|
const u8 *pos, const u8 *end)
|
|
|
|
{
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
if (pos == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (end - pos < (int) 2) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for "
|
|
|
|
"length(ID_Server)");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
len = WPA_GET_BE16(pos);
|
|
|
|
pos += 2;
|
|
|
|
|
|
|
|
if (end - pos < (int) len) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for "
|
|
|
|
"ID_Server");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (len != data->id_server_len ||
|
|
|
|
os_memcmp(pos, data->id_server, len) != 0) {
|
|
|
|
wpa_printf(MSG_INFO, "EAP-GPSK: ID_Server did not match with "
|
|
|
|
"the one used in GPSK-1");
|
|
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Server in GPSK-1",
|
|
|
|
data->id_server, data->id_server_len);
|
|
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP-GPSK: ID_Server in GPSK-3",
|
|
|
|
pos, len);
|
2009-01-15 04:25:21 +00:00
|
|
|
return NULL;
|
2008-03-24 19:46:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
pos += len;
|
|
|
|
|
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
const u8 * eap_gpsk_validate_csuite(struct eap_gpsk_data *data, const u8 *pos,
|
|
|
|
const u8 *end)
|
|
|
|
{
|
|
|
|
int vendor, specifier;
|
|
|
|
const struct eap_gpsk_csuite *csuite;
|
|
|
|
|
|
|
|
if (pos == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
2007-07-11 15:48:36 +00:00
|
|
|
if (end - pos < (int) sizeof(*csuite)) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for "
|
|
|
|
"CSuite_Sel");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
csuite = (const struct eap_gpsk_csuite *) pos;
|
2008-03-24 19:46:53 +00:00
|
|
|
vendor = WPA_GET_BE32(csuite->vendor);
|
|
|
|
specifier = WPA_GET_BE16(csuite->specifier);
|
2007-07-11 15:48:36 +00:00
|
|
|
pos += sizeof(*csuite);
|
|
|
|
if (vendor != data->vendor || specifier != data->specifier) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: CSuite_Sel (%d:%d) does not "
|
|
|
|
"match with the one sent in GPSK-2 (%d:%d)",
|
|
|
|
vendor, specifier, data->vendor, data->specifier);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
const u8 * eap_gpsk_validate_pd_payload_2(struct eap_gpsk_data *data,
|
|
|
|
const u8 *pos, const u8 *end)
|
|
|
|
{
|
|
|
|
u16 alen;
|
|
|
|
|
|
|
|
if (pos == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
2007-07-11 15:48:36 +00:00
|
|
|
if (end - pos < 2) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for "
|
|
|
|
"PD_Payload_2 length");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
alen = WPA_GET_BE16(pos);
|
|
|
|
pos += 2;
|
|
|
|
if (end - pos < alen) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for "
|
|
|
|
"%d-octet PD_Payload_2", alen);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: PD_Payload_2", pos, alen);
|
|
|
|
pos += alen;
|
2008-03-24 19:46:53 +00:00
|
|
|
|
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
const u8 * eap_gpsk_validate_gpsk_3_mic(struct eap_gpsk_data *data,
|
|
|
|
const u8 *payload,
|
|
|
|
const u8 *pos, const u8 *end)
|
|
|
|
{
|
|
|
|
size_t miclen;
|
|
|
|
u8 mic[EAP_GPSK_MAX_MIC_LEN];
|
|
|
|
|
|
|
|
if (pos == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
2007-07-11 15:48:36 +00:00
|
|
|
miclen = eap_gpsk_mic_len(data->vendor, data->specifier);
|
|
|
|
if (end - pos < (int) miclen) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Message too short for MIC "
|
2009-01-15 04:25:21 +00:00
|
|
|
"(left=%lu miclen=%lu)",
|
|
|
|
(unsigned long) (end - pos),
|
|
|
|
(unsigned long) miclen);
|
2007-07-11 15:48:36 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
|
|
|
|
data->specifier, payload, pos - payload, mic)
|
|
|
|
< 0) {
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Failed to compute MIC");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
if (os_memcmp(mic, pos, miclen) != 0) {
|
|
|
|
wpa_printf(MSG_INFO, "EAP-GPSK: Incorrect MIC in GPSK-3");
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Received MIC", pos, miclen);
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-GPSK: Computed MIC", mic, miclen);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
pos += miclen;
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
return pos;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static u8 * eap_gpsk_process_gpsk_3(struct eap_sm *sm,
|
|
|
|
struct eap_gpsk_data *data,
|
|
|
|
struct eap_method_ret *ret,
|
|
|
|
const u8 *reqData, size_t reqDataLen,
|
|
|
|
const u8 *payload, size_t payload_len,
|
|
|
|
size_t *respDataLen)
|
|
|
|
{
|
|
|
|
u8 *resp;
|
|
|
|
const struct eap_hdr *req;
|
|
|
|
const u8 *pos, *end;
|
|
|
|
|
|
|
|
if (data->state != GPSK_3) {
|
|
|
|
ret->ignore = TRUE;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Received Request/GPSK-3");
|
|
|
|
|
|
|
|
end = payload + payload_len;
|
|
|
|
|
|
|
|
pos = eap_gpsk_validate_rand(data, payload, end);
|
|
|
|
pos = eap_gpsk_validate_id_server(data, pos, end);
|
|
|
|
pos = eap_gpsk_validate_csuite(data, pos, end);
|
|
|
|
pos = eap_gpsk_validate_pd_payload_2(data, pos, end);
|
|
|
|
pos = eap_gpsk_validate_gpsk_3_mic(data, payload, pos, end);
|
|
|
|
|
|
|
|
if (pos == NULL) {
|
|
|
|
eap_gpsk_state(data, FAILURE);
|
|
|
|
return NULL;
|
|
|
|
}
|
2007-07-11 15:48:36 +00:00
|
|
|
if (pos != end) {
|
2009-01-15 04:25:21 +00:00
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Ignored %lu bytes of extra "
|
|
|
|
"data in the end of GPSK-2",
|
|
|
|
(unsigned long) (end - pos));
|
2007-07-11 15:48:36 +00:00
|
|
|
}
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
req = (const struct eap_hdr *) reqData;
|
|
|
|
resp = eap_gpsk_send_gpsk_4(data, req->identifier, respDataLen);
|
|
|
|
if (resp == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
eap_gpsk_state(data, SUCCESS);
|
|
|
|
ret->methodState = METHOD_DONE;
|
|
|
|
ret->decision = DECISION_UNCOND_SUCC;
|
|
|
|
|
|
|
|
return (u8 *) resp;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static u8 * eap_gpsk_send_gpsk_4(struct eap_gpsk_data *data, u8 identifier,
|
|
|
|
size_t *respDataLen)
|
|
|
|
{
|
|
|
|
struct eap_hdr *resp;
|
|
|
|
u8 *rpos, *start;
|
|
|
|
size_t len;
|
|
|
|
|
2007-07-11 15:48:36 +00:00
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Sending Response/GPSK-4");
|
|
|
|
|
2008-03-24 19:46:53 +00:00
|
|
|
len = 1 + 2 + eap_gpsk_mic_len(data->vendor, data->specifier);
|
2007-07-11 15:48:36 +00:00
|
|
|
|
|
|
|
resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GPSK, respDataLen, len,
|
2008-03-24 19:46:53 +00:00
|
|
|
EAP_CODE_RESPONSE, identifier, &rpos);
|
2007-07-11 15:48:36 +00:00
|
|
|
if (resp == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
*rpos++ = EAP_GPSK_OPCODE_GPSK_4;
|
|
|
|
start = rpos;
|
|
|
|
|
|
|
|
/* No PD_Payload_3 */
|
|
|
|
WPA_PUT_BE16(rpos, 0);
|
|
|
|
rpos += 2;
|
|
|
|
|
|
|
|
if (eap_gpsk_compute_mic(data->sk, data->sk_len, data->vendor,
|
|
|
|
data->specifier, start, rpos - start, rpos) <
|
|
|
|
0) {
|
|
|
|
eap_gpsk_state(data, FAILURE);
|
|
|
|
os_free(resp);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return (u8 *) resp;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static u8 * eap_gpsk_process(struct eap_sm *sm, void *priv,
|
|
|
|
struct eap_method_ret *ret,
|
|
|
|
const u8 *reqData, size_t reqDataLen,
|
|
|
|
size_t *respDataLen)
|
|
|
|
{
|
|
|
|
struct eap_gpsk_data *data = priv;
|
|
|
|
u8 *resp;
|
|
|
|
const u8 *pos;
|
|
|
|
size_t len;
|
|
|
|
|
|
|
|
pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GPSK,
|
|
|
|
reqData, reqDataLen, &len);
|
|
|
|
if (pos == NULL || len < 1) {
|
|
|
|
ret->ignore = TRUE;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Received frame: opcode %d", *pos);
|
|
|
|
|
|
|
|
ret->ignore = FALSE;
|
|
|
|
ret->methodState = METHOD_MAY_CONT;
|
|
|
|
ret->decision = DECISION_FAIL;
|
|
|
|
ret->allowNotifications = FALSE;
|
|
|
|
|
|
|
|
switch (*pos) {
|
|
|
|
case EAP_GPSK_OPCODE_GPSK_1:
|
|
|
|
resp = eap_gpsk_process_gpsk_1(sm, data, ret, reqData,
|
|
|
|
reqDataLen, pos + 1, len - 1,
|
|
|
|
respDataLen);
|
|
|
|
break;
|
|
|
|
case EAP_GPSK_OPCODE_GPSK_3:
|
|
|
|
resp = eap_gpsk_process_gpsk_3(sm, data, ret, reqData,
|
|
|
|
reqDataLen, pos + 1, len - 1,
|
|
|
|
respDataLen);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-GPSK: Ignoring message with "
|
|
|
|
"unknown opcode %d", *pos);
|
|
|
|
ret->ignore = TRUE;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return resp;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static Boolean eap_gpsk_isKeyAvailable(struct eap_sm *sm, void *priv)
|
|
|
|
{
|
|
|
|
struct eap_gpsk_data *data = priv;
|
|
|
|
return data->state == SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static u8 * eap_gpsk_getKey(struct eap_sm *sm, void *priv, size_t *len)
|
|
|
|
{
|
|
|
|
struct eap_gpsk_data *data = priv;
|
|
|
|
u8 *key;
|
|
|
|
|
|
|
|
if (data->state != SUCCESS)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
key = os_malloc(EAP_MSK_LEN);
|
|
|
|
if (key == NULL)
|
|
|
|
return NULL;
|
|
|
|
os_memcpy(key, data->msk, EAP_MSK_LEN);
|
|
|
|
*len = EAP_MSK_LEN;
|
|
|
|
|
|
|
|
return key;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static u8 * eap_gpsk_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
|
|
|
|
{
|
|
|
|
struct eap_gpsk_data *data = priv;
|
|
|
|
u8 *key;
|
|
|
|
|
|
|
|
if (data->state != SUCCESS)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
key = os_malloc(EAP_EMSK_LEN);
|
|
|
|
if (key == NULL)
|
|
|
|
return NULL;
|
|
|
|
os_memcpy(key, data->emsk, EAP_EMSK_LEN);
|
|
|
|
*len = EAP_EMSK_LEN;
|
|
|
|
|
|
|
|
return key;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int eap_peer_gpsk_register(void)
|
|
|
|
{
|
|
|
|
struct eap_method *eap;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
|
|
|
|
EAP_VENDOR_IETF, EAP_TYPE_GPSK, "GPSK");
|
|
|
|
if (eap == NULL)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
eap->init = eap_gpsk_init;
|
|
|
|
eap->deinit = eap_gpsk_deinit;
|
|
|
|
eap->process = eap_gpsk_process;
|
|
|
|
eap->isKeyAvailable = eap_gpsk_isKeyAvailable;
|
|
|
|
eap->getKey = eap_gpsk_getKey;
|
|
|
|
eap->get_emsk = eap_gpsk_get_emsk;
|
|
|
|
|
|
|
|
ret = eap_peer_method_register(eap);
|
|
|
|
if (ret)
|
|
|
|
eap_peer_method_free(eap);
|
|
|
|
return ret;
|
|
|
|
}
|