727 lines
18 KiB
C
727 lines
18 KiB
C
/*
|
|
* hostapd / EAP-PEAP (draft-josefsson-pppext-eap-tls-eap-07.txt)
|
|
* Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.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 <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include "hostapd.h"
|
|
#include "common.h"
|
|
#include "eap_i.h"
|
|
#include "eap_tls_common.h"
|
|
#include "tls.h"
|
|
|
|
|
|
/* Maximum supported PEAP version
|
|
* 0 = Microsoft's PEAP version 0; draft-kamath-pppext-peapv0-00.txt
|
|
* 1 = draft-josefsson-ppext-eap-tls-eap-05.txt
|
|
* 2 = draft-josefsson-ppext-eap-tls-eap-07.txt
|
|
*/
|
|
#define EAP_PEAP_VERSION 1
|
|
|
|
|
|
static void eap_peap_reset(struct eap_sm *sm, void *priv);
|
|
|
|
|
|
struct eap_peap_data {
|
|
struct eap_ssl_data ssl;
|
|
enum {
|
|
START, PHASE1, PHASE2_START, PHASE2_ID, PHASE2_METHOD,
|
|
PHASE2_TLV, SUCCESS_REQ, FAILURE_REQ, SUCCESS, FAILURE
|
|
} state;
|
|
|
|
int peap_version;
|
|
const struct eap_method *phase2_method;
|
|
void *phase2_priv;
|
|
int force_version;
|
|
};
|
|
|
|
|
|
static const char * eap_peap_state_txt(int state)
|
|
{
|
|
switch (state) {
|
|
case START:
|
|
return "START";
|
|
case PHASE1:
|
|
return "PHASE1";
|
|
case PHASE2_START:
|
|
return "PHASE2_START";
|
|
case PHASE2_ID:
|
|
return "PHASE2_ID";
|
|
case PHASE2_METHOD:
|
|
return "PHASE2_METHOD";
|
|
case PHASE2_TLV:
|
|
return "PHASE2_TLV";
|
|
case SUCCESS_REQ:
|
|
return "SUCCESS_REQ";
|
|
case FAILURE_REQ:
|
|
return "FAILURE_REQ";
|
|
case SUCCESS:
|
|
return "SUCCESS";
|
|
case FAILURE:
|
|
return "FAILURE";
|
|
default:
|
|
return "Unknown?!";
|
|
}
|
|
}
|
|
|
|
|
|
static void eap_peap_state(struct eap_peap_data *data, int state)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: %s -> %s",
|
|
eap_peap_state_txt(data->state),
|
|
eap_peap_state_txt(state));
|
|
data->state = state;
|
|
}
|
|
|
|
|
|
static EapType eap_peap_req_success(struct eap_sm *sm,
|
|
struct eap_peap_data *data)
|
|
{
|
|
if (data->state == FAILURE || data->state == FAILURE_REQ) {
|
|
eap_peap_state(data, FAILURE);
|
|
return EAP_TYPE_NONE;
|
|
}
|
|
|
|
if (data->peap_version == 0) {
|
|
sm->tlv_request = TLV_REQ_SUCCESS;
|
|
eap_peap_state(data, PHASE2_TLV);
|
|
return EAP_TYPE_TLV;
|
|
} else {
|
|
eap_peap_state(data, SUCCESS_REQ);
|
|
return EAP_TYPE_NONE;
|
|
}
|
|
}
|
|
|
|
|
|
static EapType eap_peap_req_failure(struct eap_sm *sm,
|
|
struct eap_peap_data *data)
|
|
{
|
|
if (data->state == FAILURE || data->state == FAILURE_REQ ||
|
|
data->state == SUCCESS_REQ ||
|
|
(data->phase2_method &&
|
|
data->phase2_method->method == EAP_TYPE_TLV)) {
|
|
eap_peap_state(data, FAILURE);
|
|
return EAP_TYPE_NONE;
|
|
}
|
|
|
|
if (data->peap_version == 0) {
|
|
sm->tlv_request = TLV_REQ_FAILURE;
|
|
eap_peap_state(data, PHASE2_TLV);
|
|
return EAP_TYPE_TLV;
|
|
} else {
|
|
eap_peap_state(data, FAILURE_REQ);
|
|
return EAP_TYPE_NONE;
|
|
}
|
|
}
|
|
|
|
|
|
static void * eap_peap_init(struct eap_sm *sm)
|
|
{
|
|
struct eap_peap_data *data;
|
|
|
|
data = malloc(sizeof(*data));
|
|
if (data == NULL)
|
|
return data;
|
|
memset(data, 0, sizeof(*data));
|
|
data->peap_version = EAP_PEAP_VERSION;
|
|
data->force_version = -1;
|
|
if (sm->user && sm->user->force_version >= 0) {
|
|
data->force_version = sm->user->force_version;
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: forcing version %d",
|
|
data->force_version);
|
|
data->peap_version = data->force_version;
|
|
}
|
|
data->state = START;
|
|
|
|
if (eap_tls_ssl_init(sm, &data->ssl, 0)) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Failed to initialize SSL.");
|
|
eap_peap_reset(sm, data);
|
|
return NULL;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
|
|
static void eap_peap_reset(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
if (data == NULL)
|
|
return;
|
|
if (data->phase2_priv && data->phase2_method)
|
|
data->phase2_method->reset(sm, data->phase2_priv);
|
|
eap_tls_ssl_deinit(sm, &data->ssl);
|
|
free(data);
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_build_start(struct eap_sm *sm, struct eap_peap_data *data,
|
|
int id, size_t *reqDataLen)
|
|
{
|
|
struct eap_hdr *req;
|
|
u8 *pos;
|
|
|
|
*reqDataLen = sizeof(*req) + 2;
|
|
req = malloc(*reqDataLen);
|
|
if (req == NULL) {
|
|
wpa_printf(MSG_ERROR, "EAP-PEAP: Failed to allocate memory for"
|
|
" request");
|
|
eap_peap_state(data, FAILURE);
|
|
return NULL;
|
|
}
|
|
|
|
req->code = EAP_CODE_REQUEST;
|
|
req->identifier = id;
|
|
req->length = htons(*reqDataLen);
|
|
pos = (u8 *) (req + 1);
|
|
*pos++ = EAP_TYPE_PEAP;
|
|
*pos = EAP_TLS_FLAGS_START | data->peap_version;
|
|
|
|
eap_peap_state(data, PHASE1);
|
|
|
|
return (u8 *) req;
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_build_req(struct eap_sm *sm, struct eap_peap_data *data,
|
|
int id, size_t *reqDataLen)
|
|
{
|
|
int res;
|
|
u8 *req;
|
|
|
|
res = eap_tls_buildReq_helper(sm, &data->ssl, EAP_TYPE_PEAP,
|
|
data->peap_version, id, &req,
|
|
reqDataLen);
|
|
|
|
if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase1 done, starting "
|
|
"Phase2");
|
|
eap_peap_state(data, PHASE2_START);
|
|
}
|
|
|
|
if (res == 1)
|
|
return eap_tls_build_ack(reqDataLen, id, EAP_TYPE_PEAP,
|
|
data->peap_version);
|
|
return req;
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_encrypt(struct eap_sm *sm, struct eap_peap_data *data,
|
|
int id, u8 *plain, size_t plain_len,
|
|
size_t *out_len)
|
|
{
|
|
int res;
|
|
u8 *pos;
|
|
struct eap_hdr *req;
|
|
|
|
/* TODO: add support for fragmentation, if needed. This will need to
|
|
* add TLS Message Length field, if the frame is fragmented. */
|
|
req = malloc(sizeof(struct eap_hdr) + 2 + data->ssl.tls_out_limit);
|
|
if (req == NULL)
|
|
return NULL;
|
|
|
|
req->code = EAP_CODE_REQUEST;
|
|
req->identifier = id;
|
|
|
|
pos = (u8 *) (req + 1);
|
|
*pos++ = EAP_TYPE_PEAP;
|
|
*pos++ = data->peap_version;
|
|
|
|
res = tls_connection_encrypt(sm->ssl_ctx, data->ssl.conn,
|
|
plain, plain_len,
|
|
pos, data->ssl.tls_out_limit);
|
|
if (res < 0) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Failed to encrypt Phase 2 "
|
|
"data");
|
|
free(req);
|
|
return NULL;
|
|
}
|
|
|
|
*out_len = sizeof(struct eap_hdr) + 2 + res;
|
|
req->length = host_to_be16(*out_len);
|
|
return (u8 *) req;
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_build_phase2_req(struct eap_sm *sm,
|
|
struct eap_peap_data *data,
|
|
int id, size_t *reqDataLen)
|
|
{
|
|
u8 *req, *buf, *encr_req;
|
|
size_t req_len;
|
|
|
|
buf = req = data->phase2_method->buildReq(sm, data->phase2_priv, id,
|
|
&req_len);
|
|
if (req == NULL)
|
|
return NULL;
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: Encrypting Phase 2 data",
|
|
req, req_len);
|
|
|
|
if (data->peap_version == 0 &&
|
|
data->phase2_method->method != EAP_TYPE_TLV) {
|
|
req += sizeof(struct eap_hdr);
|
|
req_len -= sizeof(struct eap_hdr);
|
|
}
|
|
|
|
encr_req = eap_peap_encrypt(sm, data, id, req, req_len, reqDataLen);
|
|
free(buf);
|
|
|
|
return encr_req;
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_build_phase2_term(struct eap_sm *sm,
|
|
struct eap_peap_data *data,
|
|
int id, size_t *reqDataLen, int success)
|
|
{
|
|
u8 *encr_req;
|
|
size_t req_len;
|
|
struct eap_hdr *hdr;
|
|
|
|
req_len = sizeof(*hdr);
|
|
hdr = malloc(req_len);
|
|
if (hdr == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
memset(hdr, 0, req_len);
|
|
hdr->code = success ? EAP_CODE_SUCCESS : EAP_CODE_FAILURE;
|
|
hdr->identifier = id;
|
|
hdr->length = htons(req_len);
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: Encrypting Phase 2 data",
|
|
(u8 *) hdr, req_len);
|
|
|
|
encr_req = eap_peap_encrypt(sm, data, id, (u8 *) hdr, req_len,
|
|
reqDataLen);
|
|
free(hdr);
|
|
|
|
return encr_req;
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_buildReq(struct eap_sm *sm, void *priv, int id,
|
|
size_t *reqDataLen)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
|
|
switch (data->state) {
|
|
case START:
|
|
return eap_peap_build_start(sm, data, id, reqDataLen);
|
|
case PHASE1:
|
|
return eap_peap_build_req(sm, data, id, reqDataLen);
|
|
case PHASE2_ID:
|
|
case PHASE2_METHOD:
|
|
case PHASE2_TLV:
|
|
return eap_peap_build_phase2_req(sm, data, id, reqDataLen);
|
|
case SUCCESS_REQ:
|
|
return eap_peap_build_phase2_term(sm, data, id, reqDataLen, 1);
|
|
case FAILURE_REQ:
|
|
return eap_peap_build_phase2_term(sm, data, id, reqDataLen, 0);
|
|
default:
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: %s - unexpected state %d",
|
|
__func__, data->state);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
|
|
static Boolean eap_peap_check(struct eap_sm *sm, void *priv,
|
|
u8 *respData, size_t respDataLen)
|
|
{
|
|
struct eap_hdr *resp;
|
|
u8 *pos;
|
|
size_t len;
|
|
|
|
resp = (struct eap_hdr *) respData;
|
|
pos = (u8 *) (resp + 1);
|
|
if (respDataLen < sizeof(*resp) + 2 || *pos != EAP_TYPE_PEAP ||
|
|
(len = ntohs(resp->length)) > respDataLen) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Invalid frame");
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
static int eap_peap_phase2_init(struct eap_sm *sm, struct eap_peap_data *data,
|
|
u8 eap_type)
|
|
{
|
|
if (data->phase2_priv && data->phase2_method) {
|
|
data->phase2_method->reset(sm, data->phase2_priv);
|
|
data->phase2_method = NULL;
|
|
data->phase2_priv = NULL;
|
|
}
|
|
data->phase2_method = eap_sm_get_eap_methods(eap_type);
|
|
if (!data->phase2_method)
|
|
return -1;
|
|
|
|
sm->init_phase2 = 1;
|
|
data->phase2_priv = data->phase2_method->init(sm);
|
|
sm->init_phase2 = 0;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void eap_peap_process_phase2_response(struct eap_sm *sm,
|
|
struct eap_peap_data *data,
|
|
u8 *in_data, size_t in_len)
|
|
{
|
|
u8 next_type = EAP_TYPE_NONE;
|
|
struct eap_hdr *hdr;
|
|
u8 *pos;
|
|
size_t left;
|
|
|
|
if (data->phase2_priv == NULL) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: %s - Phase2 not "
|
|
"initialized?!", __func__);
|
|
return;
|
|
}
|
|
|
|
hdr = (struct eap_hdr *) in_data;
|
|
pos = (u8 *) (hdr + 1);
|
|
left = in_len - sizeof(*hdr);
|
|
|
|
if (in_len > sizeof(*hdr) && *pos == EAP_TYPE_NAK) {
|
|
wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Phase2 type Nak'ed; "
|
|
"allowed types", pos + 1, left - 1);
|
|
eap_sm_process_nak(sm, pos + 1, left - 1);
|
|
if (sm->user && sm->user_eap_method_index < EAP_MAX_METHODS &&
|
|
sm->user->methods[sm->user_eap_method_index] !=
|
|
EAP_TYPE_NONE) {
|
|
next_type =
|
|
sm->user->methods[sm->user_eap_method_index++];
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: try EAP type %d",
|
|
next_type);
|
|
} else {
|
|
next_type = eap_peap_req_failure(sm, data);
|
|
}
|
|
eap_peap_phase2_init(sm, data, next_type);
|
|
return;
|
|
}
|
|
|
|
if (data->phase2_method->check(sm, data->phase2_priv, in_data,
|
|
in_len)) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase2 check() asked to "
|
|
"ignore the packet");
|
|
return;
|
|
}
|
|
|
|
data->phase2_method->process(sm, data->phase2_priv, in_data, in_len);
|
|
|
|
if (!data->phase2_method->isDone(sm, data->phase2_priv))
|
|
return;
|
|
|
|
|
|
if (!data->phase2_method->isSuccess(sm, data->phase2_priv)) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase2 method failed");
|
|
next_type = eap_peap_req_failure(sm, data);
|
|
eap_peap_phase2_init(sm, data, next_type);
|
|
return;
|
|
}
|
|
|
|
switch (data->state) {
|
|
case PHASE2_ID:
|
|
if (eap_user_get(sm, sm->identity, sm->identity_len, 1) != 0) {
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP_PEAP: Phase2 "
|
|
"Identity not found in the user "
|
|
"database",
|
|
sm->identity, sm->identity_len);
|
|
next_type = eap_peap_req_failure(sm, data);
|
|
break;
|
|
}
|
|
|
|
eap_peap_state(data, PHASE2_METHOD);
|
|
next_type = sm->user->methods[0];
|
|
sm->user_eap_method_index = 1;
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: try EAP type %d", next_type);
|
|
break;
|
|
case PHASE2_METHOD:
|
|
next_type = eap_peap_req_success(sm, data);
|
|
break;
|
|
case PHASE2_TLV:
|
|
if (sm->tlv_request == TLV_REQ_SUCCESS ||
|
|
data->state == SUCCESS_REQ) {
|
|
eap_peap_state(data, SUCCESS);
|
|
} else {
|
|
eap_peap_state(data, FAILURE);
|
|
}
|
|
break;
|
|
case FAILURE:
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: %s - unexpected state %d",
|
|
__func__, data->state);
|
|
break;
|
|
}
|
|
|
|
eap_peap_phase2_init(sm, data, next_type);
|
|
}
|
|
|
|
|
|
static void eap_peap_process_phase2(struct eap_sm *sm,
|
|
struct eap_peap_data *data,
|
|
struct eap_hdr *resp,
|
|
u8 *in_data, size_t in_len)
|
|
{
|
|
u8 *in_decrypted;
|
|
int buf_len, len_decrypted, len, res;
|
|
struct eap_hdr *hdr;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: received %lu bytes encrypted data for"
|
|
" Phase 2", (unsigned long) in_len);
|
|
|
|
res = eap_tls_data_reassemble(sm, &data->ssl, &in_data, &in_len);
|
|
if (res < 0 || res == 1)
|
|
return;
|
|
|
|
buf_len = in_len;
|
|
if (data->ssl.tls_in_total > buf_len)
|
|
buf_len = data->ssl.tls_in_total;
|
|
in_decrypted = malloc(buf_len);
|
|
if (in_decrypted == NULL) {
|
|
free(data->ssl.tls_in);
|
|
data->ssl.tls_in = NULL;
|
|
data->ssl.tls_in_len = 0;
|
|
wpa_printf(MSG_WARNING, "EAP-PEAP: failed to allocate memory "
|
|
"for decryption");
|
|
return;
|
|
}
|
|
|
|
len_decrypted = tls_connection_decrypt(sm->ssl_ctx, data->ssl.conn,
|
|
in_data, in_len,
|
|
in_decrypted, buf_len);
|
|
free(data->ssl.tls_in);
|
|
data->ssl.tls_in = NULL;
|
|
data->ssl.tls_in_len = 0;
|
|
if (len_decrypted < 0) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Failed to decrypt Phase 2 "
|
|
"data");
|
|
free(in_decrypted);
|
|
eap_peap_state(data, FAILURE);
|
|
return;
|
|
}
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-PEAP: Decrypted Phase 2 EAP",
|
|
in_decrypted, len_decrypted);
|
|
|
|
hdr = (struct eap_hdr *) in_decrypted;
|
|
|
|
if (data->peap_version == 0 && data->state != PHASE2_TLV) {
|
|
struct eap_hdr *nhdr = malloc(sizeof(struct eap_hdr) +
|
|
len_decrypted);
|
|
if (nhdr == NULL) {
|
|
free(in_decrypted);
|
|
return;
|
|
}
|
|
memcpy((u8 *) (nhdr + 1), in_decrypted, len_decrypted);
|
|
free(in_decrypted);
|
|
nhdr->code = resp->code;
|
|
nhdr->identifier = resp->identifier;
|
|
nhdr->length = host_to_be16(sizeof(struct eap_hdr) +
|
|
len_decrypted);
|
|
|
|
len_decrypted += sizeof(struct eap_hdr);
|
|
in_decrypted = (u8 *) nhdr;
|
|
}
|
|
hdr = (struct eap_hdr *) in_decrypted;
|
|
if (len_decrypted < sizeof(*hdr)) {
|
|
free(in_decrypted);
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Too short Phase 2 "
|
|
"EAP frame (len=%d)", len_decrypted);
|
|
eap_peap_req_failure(sm, data);
|
|
return;
|
|
}
|
|
len = be_to_host16(hdr->length);
|
|
if (len > len_decrypted) {
|
|
free(in_decrypted);
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Length mismatch in "
|
|
"Phase 2 EAP frame (len=%d hdr->length=%d)",
|
|
len_decrypted, len);
|
|
eap_peap_req_failure(sm, data);
|
|
return;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: received Phase 2: code=%d "
|
|
"identifier=%d length=%d", hdr->code, hdr->identifier, len);
|
|
switch (hdr->code) {
|
|
case EAP_CODE_RESPONSE:
|
|
eap_peap_process_phase2_response(sm, data, (u8 *) hdr, len);
|
|
break;
|
|
case EAP_CODE_SUCCESS:
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Success");
|
|
if (data->state == SUCCESS_REQ) {
|
|
eap_peap_state(data, SUCCESS);
|
|
}
|
|
break;
|
|
case EAP_CODE_FAILURE:
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Phase 2 Failure");
|
|
eap_peap_state(data, FAILURE);
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Unexpected code=%d in "
|
|
"Phase 2 EAP header", hdr->code);
|
|
break;
|
|
}
|
|
|
|
free(in_decrypted);
|
|
}
|
|
|
|
|
|
static void eap_peap_process(struct eap_sm *sm, void *priv,
|
|
u8 *respData, size_t respDataLen)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
struct eap_hdr *resp;
|
|
u8 *pos, flags;
|
|
int left;
|
|
unsigned int tls_msg_len;
|
|
int peer_version;
|
|
|
|
resp = (struct eap_hdr *) respData;
|
|
pos = (u8 *) (resp + 1);
|
|
pos++;
|
|
flags = *pos++;
|
|
left = htons(resp->length) - sizeof(struct eap_hdr) - 2;
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Received packet(len=%lu) - "
|
|
"Flags 0x%02x", (unsigned long) respDataLen, flags);
|
|
peer_version = flags & EAP_PEAP_VERSION_MASK;
|
|
if (data->force_version >= 0 && peer_version != data->force_version) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: peer did not select the forced"
|
|
" version (forced=%d peer=%d) - reject",
|
|
data->force_version, peer_version);
|
|
eap_peap_state(data, FAILURE);
|
|
return;
|
|
}
|
|
if (peer_version < data->peap_version) {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: peer ver=%d, own ver=%d; "
|
|
"use version %d",
|
|
peer_version, data->peap_version, peer_version);
|
|
data->peap_version = peer_version;
|
|
|
|
}
|
|
if (flags & EAP_TLS_FLAGS_LENGTH_INCLUDED) {
|
|
if (left < 4) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Short frame with TLS "
|
|
"length");
|
|
eap_peap_state(data, FAILURE);
|
|
return;
|
|
}
|
|
tls_msg_len = (pos[0] << 24) | (pos[1] << 16) | (pos[2] << 8) |
|
|
pos[3];
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: TLS Message Length: %d",
|
|
tls_msg_len);
|
|
if (data->ssl.tls_in_left == 0) {
|
|
data->ssl.tls_in_total = tls_msg_len;
|
|
data->ssl.tls_in_left = tls_msg_len;
|
|
free(data->ssl.tls_in);
|
|
data->ssl.tls_in = NULL;
|
|
data->ssl.tls_in_len = 0;
|
|
}
|
|
pos += 4;
|
|
left -= 4;
|
|
}
|
|
|
|
switch (data->state) {
|
|
case PHASE1:
|
|
if (eap_tls_process_helper(sm, &data->ssl, pos, left) < 0) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: TLS processing "
|
|
"failed");
|
|
eap_peap_state(data, FAILURE);
|
|
}
|
|
break;
|
|
case PHASE2_START:
|
|
eap_peap_state(data, PHASE2_ID);
|
|
eap_peap_phase2_init(sm, data, EAP_TYPE_IDENTITY);
|
|
break;
|
|
case PHASE2_ID:
|
|
case PHASE2_METHOD:
|
|
case PHASE2_TLV:
|
|
eap_peap_process_phase2(sm, data, resp, pos, left);
|
|
break;
|
|
case SUCCESS_REQ:
|
|
eap_peap_state(data, SUCCESS);
|
|
break;
|
|
case FAILURE_REQ:
|
|
eap_peap_state(data, FAILURE);
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Unexpected state %d in %s",
|
|
data->state, __func__);
|
|
break;
|
|
}
|
|
|
|
if (tls_connection_get_write_alerts(sm->ssl_ctx, data->ssl.conn) > 1) {
|
|
wpa_printf(MSG_INFO, "EAP-PEAP: Locally detected fatal error "
|
|
"in TLS processing");
|
|
eap_peap_state(data, FAILURE);
|
|
}
|
|
}
|
|
|
|
|
|
static Boolean eap_peap_isDone(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
return data->state == SUCCESS || data->state == FAILURE;
|
|
}
|
|
|
|
|
|
static u8 * eap_peap_getKey(struct eap_sm *sm, void *priv, size_t *len)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
u8 *eapKeyData;
|
|
|
|
if (data->state != SUCCESS)
|
|
return NULL;
|
|
|
|
/* TODO: PEAPv1 - different label in some cases */
|
|
eapKeyData = eap_tls_derive_key(sm, &data->ssl,
|
|
"client EAP encryption",
|
|
EAP_TLS_KEY_LEN);
|
|
if (eapKeyData) {
|
|
*len = EAP_TLS_KEY_LEN;
|
|
wpa_hexdump(MSG_DEBUG, "EAP-PEAP: Derived key",
|
|
eapKeyData, EAP_TLS_KEY_LEN);
|
|
} else {
|
|
wpa_printf(MSG_DEBUG, "EAP-PEAP: Failed to derive key");
|
|
}
|
|
|
|
return eapKeyData;
|
|
}
|
|
|
|
|
|
static Boolean eap_peap_isSuccess(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_peap_data *data = priv;
|
|
return data->state == SUCCESS;
|
|
}
|
|
|
|
|
|
const struct eap_method eap_method_peap =
|
|
{
|
|
.method = EAP_TYPE_PEAP,
|
|
.name = "PEAP",
|
|
.init = eap_peap_init,
|
|
.reset = eap_peap_reset,
|
|
.buildReq = eap_peap_buildReq,
|
|
.check = eap_peap_check,
|
|
.process = eap_peap_process,
|
|
.isDone = eap_peap_isDone,
|
|
.getKey = eap_peap_getKey,
|
|
.isSuccess = eap_peap_isSuccess,
|
|
};
|