1759 lines
48 KiB
C
1759 lines
48 KiB
C
/*
|
|
* EAP peer method: EAP-TTLS (draft-ietf-pppext-eap-ttls-03.txt)
|
|
* Copyright (c) 2004-2006, 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 "eap_tls_common.h"
|
|
#include "config_ssid.h"
|
|
#include "ms_funcs.h"
|
|
#include "sha1.h"
|
|
#include "crypto.h"
|
|
#include "tls.h"
|
|
#include "eap_ttls.h"
|
|
|
|
|
|
/* Maximum supported PEAP version
|
|
* 0 = draft-ietf-pppext-eap-ttls-03.txt / draft-funk-eap-ttls-v0-00.txt
|
|
* 1 = draft-funk-eap-ttls-v1-00.txt
|
|
*/
|
|
#define EAP_TTLS_VERSION 0 /* TTLSv1 implementation is not yet complete */
|
|
|
|
|
|
#define MSCHAPV2_KEY_LEN 16
|
|
|
|
|
|
static void eap_ttls_deinit(struct eap_sm *sm, void *priv);
|
|
|
|
|
|
struct eap_ttls_data {
|
|
struct eap_ssl_data ssl;
|
|
int ssl_initialized;
|
|
|
|
int ttls_version, force_ttls_version;
|
|
|
|
const struct eap_method *phase2_method;
|
|
void *phase2_priv;
|
|
int phase2_success;
|
|
int phase2_start;
|
|
|
|
enum {
|
|
EAP_TTLS_PHASE2_EAP,
|
|
EAP_TTLS_PHASE2_MSCHAPV2,
|
|
EAP_TTLS_PHASE2_MSCHAP,
|
|
EAP_TTLS_PHASE2_PAP,
|
|
EAP_TTLS_PHASE2_CHAP
|
|
} phase2_type;
|
|
struct eap_method_type phase2_eap_type;
|
|
struct eap_method_type *phase2_eap_types;
|
|
size_t num_phase2_eap_types;
|
|
|
|
u8 auth_response[20];
|
|
int auth_response_valid;
|
|
u8 ident;
|
|
int resuming; /* starting a resumed session */
|
|
int reauth; /* reauthentication */
|
|
u8 *key_data;
|
|
|
|
u8 *pending_phase2_req;
|
|
size_t pending_phase2_req_len;
|
|
};
|
|
|
|
|
|
static void * eap_ttls_init(struct eap_sm *sm)
|
|
{
|
|
struct eap_ttls_data *data;
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
char *selected;
|
|
|
|
data = os_zalloc(sizeof(*data));
|
|
if (data == NULL)
|
|
return NULL;
|
|
data->ttls_version = EAP_TTLS_VERSION;
|
|
data->force_ttls_version = -1;
|
|
selected = "EAP";
|
|
data->phase2_type = EAP_TTLS_PHASE2_EAP;
|
|
|
|
if (config && config->phase1) {
|
|
char *pos = os_strstr(config->phase1, "ttlsver=");
|
|
if (pos) {
|
|
data->force_ttls_version = atoi(pos + 8);
|
|
data->ttls_version = data->force_ttls_version;
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Forced TTLS version "
|
|
"%d", data->force_ttls_version);
|
|
}
|
|
}
|
|
|
|
if (config && config->phase2) {
|
|
if (os_strstr(config->phase2, "autheap=")) {
|
|
selected = "EAP";
|
|
data->phase2_type = EAP_TTLS_PHASE2_EAP;
|
|
} else if (os_strstr(config->phase2, "auth=MSCHAPV2")) {
|
|
selected = "MSCHAPV2";
|
|
data->phase2_type = EAP_TTLS_PHASE2_MSCHAPV2;
|
|
} else if (os_strstr(config->phase2, "auth=MSCHAP")) {
|
|
selected = "MSCHAP";
|
|
data->phase2_type = EAP_TTLS_PHASE2_MSCHAP;
|
|
} else if (os_strstr(config->phase2, "auth=PAP")) {
|
|
selected = "PAP";
|
|
data->phase2_type = EAP_TTLS_PHASE2_PAP;
|
|
} else if (os_strstr(config->phase2, "auth=CHAP")) {
|
|
selected = "CHAP";
|
|
data->phase2_type = EAP_TTLS_PHASE2_CHAP;
|
|
}
|
|
}
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase2 type: %s", selected);
|
|
|
|
if (data->phase2_type == EAP_TTLS_PHASE2_EAP) {
|
|
if (config && config->phase2) {
|
|
char *start, *pos, *buf;
|
|
struct eap_method_type *methods = NULL, *_methods;
|
|
u8 method;
|
|
size_t num_methods = 0;
|
|
start = buf = os_strdup(config->phase2);
|
|
if (buf == NULL) {
|
|
eap_ttls_deinit(sm, data);
|
|
return NULL;
|
|
}
|
|
while (start && *start != '\0') {
|
|
int vendor;
|
|
pos = os_strstr(start, "autheap=");
|
|
if (pos == NULL)
|
|
break;
|
|
if (start != pos && *(pos - 1) != ' ') {
|
|
start = pos + 8;
|
|
continue;
|
|
}
|
|
|
|
start = pos + 8;
|
|
pos = os_strchr(start, ' ');
|
|
if (pos)
|
|
*pos++ = '\0';
|
|
method = eap_get_phase2_type(start, &vendor);
|
|
if (vendor == EAP_VENDOR_IETF &&
|
|
method == EAP_TYPE_NONE) {
|
|
wpa_printf(MSG_ERROR, "EAP-TTLS: "
|
|
"Unsupported Phase2 EAP "
|
|
"method '%s'", start);
|
|
} else {
|
|
num_methods++;
|
|
_methods = os_realloc(
|
|
methods, num_methods *
|
|
sizeof(*methods));
|
|
if (_methods == NULL) {
|
|
os_free(methods);
|
|
os_free(buf);
|
|
eap_ttls_deinit(sm, data);
|
|
return NULL;
|
|
}
|
|
methods = _methods;
|
|
methods[num_methods - 1].vendor =
|
|
vendor;
|
|
methods[num_methods - 1].method =
|
|
method;
|
|
}
|
|
|
|
start = pos;
|
|
}
|
|
os_free(buf);
|
|
data->phase2_eap_types = methods;
|
|
data->num_phase2_eap_types = num_methods;
|
|
}
|
|
if (data->phase2_eap_types == NULL) {
|
|
data->phase2_eap_types = eap_get_phase2_types(
|
|
config, &data->num_phase2_eap_types);
|
|
}
|
|
if (data->phase2_eap_types == NULL) {
|
|
wpa_printf(MSG_ERROR, "EAP-TTLS: No Phase2 EAP method "
|
|
"available");
|
|
eap_ttls_deinit(sm, data);
|
|
return NULL;
|
|
}
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase2 EAP types",
|
|
(u8 *) data->phase2_eap_types,
|
|
data->num_phase2_eap_types *
|
|
sizeof(struct eap_method_type));
|
|
data->phase2_eap_type.vendor = EAP_VENDOR_IETF;
|
|
data->phase2_eap_type.method = EAP_TYPE_NONE;
|
|
}
|
|
|
|
if (!(tls_capabilities(sm->ssl_ctx) & TLS_CAPABILITY_IA) &&
|
|
data->ttls_version > 0) {
|
|
if (data->force_ttls_version > 0) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Forced TTLSv%d and "
|
|
"TLS library does not support TLS/IA.",
|
|
data->force_ttls_version);
|
|
eap_ttls_deinit(sm, data);
|
|
return NULL;
|
|
}
|
|
data->ttls_version = 0;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
|
|
static void eap_ttls_deinit(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_ttls_data *data = priv;
|
|
if (data == NULL)
|
|
return;
|
|
if (data->phase2_priv && data->phase2_method)
|
|
data->phase2_method->deinit(sm, data->phase2_priv);
|
|
os_free(data->phase2_eap_types);
|
|
if (data->ssl_initialized)
|
|
eap_tls_ssl_deinit(sm, &data->ssl);
|
|
os_free(data->key_data);
|
|
os_free(data->pending_phase2_req);
|
|
os_free(data);
|
|
}
|
|
|
|
|
|
static int eap_ttls_encrypt(struct eap_sm *sm, struct eap_ttls_data *data,
|
|
int id, const u8 *plain, size_t plain_len,
|
|
u8 **out_data, size_t *out_len)
|
|
{
|
|
int res;
|
|
u8 *pos;
|
|
struct eap_hdr *resp;
|
|
|
|
/* TODO: add support for fragmentation, if needed. This will need to
|
|
* add TLS Message Length field, if the frame is fragmented. */
|
|
resp = os_malloc(sizeof(struct eap_hdr) + 2 + data->ssl.tls_out_limit);
|
|
if (resp == NULL)
|
|
return -1;
|
|
|
|
resp->code = EAP_CODE_RESPONSE;
|
|
resp->identifier = id;
|
|
|
|
pos = (u8 *) (resp + 1);
|
|
*pos++ = EAP_TYPE_TTLS;
|
|
*pos++ = data->ttls_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-TTLS: Failed to encrypt Phase 2 "
|
|
"data");
|
|
os_free(resp);
|
|
return -1;
|
|
}
|
|
|
|
*out_len = sizeof(struct eap_hdr) + 2 + res;
|
|
resp->length = host_to_be16(*out_len);
|
|
*out_data = (u8 *) resp;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static u8 * eap_ttls_avp_hdr(u8 *avphdr, u32 avp_code, u32 vendor_id,
|
|
int mandatory, size_t len)
|
|
{
|
|
struct ttls_avp_vendor *avp;
|
|
u8 flags;
|
|
size_t hdrlen;
|
|
|
|
avp = (struct ttls_avp_vendor *) avphdr;
|
|
flags = mandatory ? AVP_FLAGS_MANDATORY : 0;
|
|
if (vendor_id) {
|
|
flags |= AVP_FLAGS_VENDOR;
|
|
hdrlen = sizeof(*avp);
|
|
avp->vendor_id = host_to_be32(vendor_id);
|
|
} else {
|
|
hdrlen = sizeof(struct ttls_avp);
|
|
}
|
|
|
|
avp->avp_code = host_to_be32(avp_code);
|
|
avp->avp_length = host_to_be32((flags << 24) | (hdrlen + len));
|
|
|
|
return avphdr + hdrlen;
|
|
}
|
|
|
|
|
|
static u8 * eap_ttls_avp_add(u8 *start, u8 *avphdr, u32 avp_code,
|
|
u32 vendor_id, int mandatory,
|
|
u8 *data, size_t len)
|
|
{
|
|
u8 *pos;
|
|
pos = eap_ttls_avp_hdr(avphdr, avp_code, vendor_id, mandatory, len);
|
|
os_memcpy(pos, data, len);
|
|
pos += len;
|
|
AVP_PAD(start, pos);
|
|
return pos;
|
|
}
|
|
|
|
|
|
static int eap_ttls_avp_encapsulate(u8 **resp, size_t *resp_len, u32 avp_code,
|
|
int mandatory)
|
|
{
|
|
u8 *avp, *pos;
|
|
|
|
avp = os_malloc(sizeof(struct ttls_avp) + *resp_len + 4);
|
|
if (avp == NULL) {
|
|
os_free(*resp);
|
|
*resp = NULL;
|
|
*resp_len = 0;
|
|
return -1;
|
|
}
|
|
|
|
pos = eap_ttls_avp_hdr(avp, avp_code, 0, mandatory, *resp_len);
|
|
os_memcpy(pos, *resp, *resp_len);
|
|
pos += *resp_len;
|
|
AVP_PAD(avp, pos);
|
|
os_free(*resp);
|
|
*resp = avp;
|
|
*resp_len = pos - avp;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eap_ttls_ia_permute_inner_secret(struct eap_sm *sm,
|
|
struct eap_ttls_data *data,
|
|
const u8 *key, size_t key_len)
|
|
{
|
|
u8 *buf;
|
|
size_t buf_len;
|
|
int ret;
|
|
|
|
if (key) {
|
|
buf_len = 2 + key_len;
|
|
buf = os_malloc(buf_len);
|
|
if (buf == NULL)
|
|
return -1;
|
|
WPA_PUT_BE16(buf, key_len);
|
|
os_memcpy(buf + 2, key, key_len);
|
|
} else {
|
|
buf = NULL;
|
|
buf_len = 0;
|
|
}
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Session keys for TLS/IA inner "
|
|
"secret permutation", buf, buf_len);
|
|
ret = tls_connection_ia_permute_inner_secret(sm->ssl_ctx,
|
|
data->ssl.conn,
|
|
buf, buf_len);
|
|
os_free(buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int eap_ttls_v0_derive_key(struct eap_sm *sm,
|
|
struct eap_ttls_data *data)
|
|
{
|
|
os_free(data->key_data);
|
|
data->key_data = eap_tls_derive_key(sm, &data->ssl,
|
|
"ttls keying material",
|
|
EAP_TLS_KEY_LEN);
|
|
if (!data->key_data) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Failed to derive key");
|
|
return -1;
|
|
}
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived key",
|
|
data->key_data, EAP_TLS_KEY_LEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eap_ttls_v1_derive_key(struct eap_sm *sm,
|
|
struct eap_ttls_data *data)
|
|
{
|
|
struct tls_keys keys;
|
|
u8 *rnd;
|
|
|
|
os_free(data->key_data);
|
|
data->key_data = NULL;
|
|
|
|
os_memset(&keys, 0, sizeof(keys));
|
|
if (tls_connection_get_keys(sm->ssl_ctx, data->ssl.conn, &keys) ||
|
|
keys.client_random == NULL || keys.server_random == NULL ||
|
|
keys.inner_secret == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Could not get inner secret, "
|
|
"client random, or server random to derive keying "
|
|
"material");
|
|
return -1;
|
|
}
|
|
|
|
rnd = os_malloc(keys.client_random_len + keys.server_random_len);
|
|
data->key_data = os_malloc(EAP_TLS_KEY_LEN);
|
|
if (rnd == NULL || data->key_data == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: No memory for key derivation");
|
|
os_free(rnd);
|
|
os_free(data->key_data);
|
|
data->key_data = NULL;
|
|
return -1;
|
|
}
|
|
os_memcpy(rnd, keys.client_random, keys.client_random_len);
|
|
os_memcpy(rnd + keys.client_random_len, keys.server_random,
|
|
keys.server_random_len);
|
|
|
|
if (tls_prf(keys.inner_secret, keys.inner_secret_len,
|
|
"ttls v1 keying material", rnd, keys.client_random_len +
|
|
keys.server_random_len, data->key_data, EAP_TLS_KEY_LEN)) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Failed to derive key");
|
|
os_free(rnd);
|
|
os_free(data->key_data);
|
|
data->key_data = NULL;
|
|
return -1;
|
|
}
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: client/server random",
|
|
rnd, keys.client_random_len + keys.server_random_len);
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: TLS/IA inner secret",
|
|
keys.inner_secret, keys.inner_secret_len);
|
|
|
|
os_free(rnd);
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived key",
|
|
data->key_data, EAP_TLS_KEY_LEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static u8 * eap_ttls_implicit_challenge(struct eap_sm *sm,
|
|
struct eap_ttls_data *data, size_t len)
|
|
{
|
|
struct tls_keys keys;
|
|
u8 *challenge, *rnd;
|
|
|
|
if (data->ttls_version == 0) {
|
|
return eap_tls_derive_key(sm, &data->ssl, "ttls challenge",
|
|
len);
|
|
}
|
|
|
|
os_memset(&keys, 0, sizeof(keys));
|
|
if (tls_connection_get_keys(sm->ssl_ctx, data->ssl.conn, &keys) ||
|
|
keys.client_random == NULL || keys.server_random == NULL ||
|
|
keys.inner_secret == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Could not get inner secret, "
|
|
"client random, or server random to derive "
|
|
"implicit challenge");
|
|
return NULL;
|
|
}
|
|
|
|
rnd = os_malloc(keys.client_random_len + keys.server_random_len);
|
|
challenge = os_malloc(len);
|
|
if (rnd == NULL || challenge == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: No memory for implicit "
|
|
"challenge derivation");
|
|
os_free(rnd);
|
|
os_free(challenge);
|
|
return NULL;
|
|
}
|
|
os_memcpy(rnd, keys.server_random, keys.server_random_len);
|
|
os_memcpy(rnd + keys.server_random_len, keys.client_random,
|
|
keys.client_random_len);
|
|
|
|
if (tls_prf(keys.inner_secret, keys.inner_secret_len,
|
|
"inner application challenge", rnd,
|
|
keys.client_random_len + keys.server_random_len,
|
|
challenge, len)) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Failed to derive implicit "
|
|
"challenge");
|
|
os_free(rnd);
|
|
os_free(challenge);
|
|
return NULL;
|
|
}
|
|
|
|
os_free(rnd);
|
|
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived implicit challenge",
|
|
challenge, len);
|
|
|
|
return challenge;
|
|
}
|
|
|
|
|
|
static int eap_ttls_phase2_nak(struct eap_ttls_data *data, struct eap_hdr *hdr,
|
|
u8 **resp, size_t *resp_len)
|
|
{
|
|
struct eap_hdr *resp_hdr;
|
|
u8 *pos = (u8 *) (hdr + 1);
|
|
size_t i;
|
|
|
|
/* TODO: add support for expanded Nak */
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 Request: Nak type=%d", *pos);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Allowed Phase2 EAP types",
|
|
(u8 *) data->phase2_eap_types, data->num_phase2_eap_types *
|
|
sizeof(struct eap_method_type));
|
|
*resp_len = sizeof(struct eap_hdr) + 1;
|
|
*resp = os_malloc(*resp_len + data->num_phase2_eap_types);
|
|
if (*resp == NULL)
|
|
return -1;
|
|
|
|
resp_hdr = (struct eap_hdr *) (*resp);
|
|
resp_hdr->code = EAP_CODE_RESPONSE;
|
|
resp_hdr->identifier = hdr->identifier;
|
|
pos = (u8 *) (resp_hdr + 1);
|
|
*pos++ = EAP_TYPE_NAK;
|
|
for (i = 0; i < data->num_phase2_eap_types; i++) {
|
|
if (data->phase2_eap_types[i].vendor == EAP_VENDOR_IETF &&
|
|
data->phase2_eap_types[i].method < 256) {
|
|
(*resp_len)++;
|
|
*pos++ = data->phase2_eap_types[i].method;
|
|
}
|
|
}
|
|
resp_hdr->length = host_to_be16(*resp_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eap_ttls_phase2_request_eap(struct eap_sm *sm,
|
|
struct eap_ttls_data *data,
|
|
struct eap_method_ret *ret,
|
|
struct eap_hdr *hdr,
|
|
u8 **resp, size_t *resp_len)
|
|
{
|
|
size_t len = be_to_host16(hdr->length);
|
|
u8 *pos;
|
|
struct eap_method_ret iret;
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
|
|
if (len <= sizeof(struct eap_hdr)) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: too short "
|
|
"Phase 2 request (len=%lu)", (unsigned long) len);
|
|
return -1;
|
|
}
|
|
pos = (u8 *) (hdr + 1);
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP Request: type=%d", *pos);
|
|
switch (*pos) {
|
|
case EAP_TYPE_IDENTITY:
|
|
*resp = eap_sm_buildIdentity(sm, hdr->identifier, resp_len, 1);
|
|
break;
|
|
default:
|
|
if (data->phase2_eap_type.vendor == EAP_VENDOR_IETF &&
|
|
data->phase2_eap_type.method == EAP_TYPE_NONE) {
|
|
size_t i;
|
|
for (i = 0; i < data->num_phase2_eap_types; i++) {
|
|
if (data->phase2_eap_types[i].vendor !=
|
|
EAP_VENDOR_IETF ||
|
|
data->phase2_eap_types[i].method != *pos)
|
|
continue;
|
|
|
|
data->phase2_eap_type.vendor =
|
|
data->phase2_eap_types[i].vendor;
|
|
data->phase2_eap_type.method =
|
|
data->phase2_eap_types[i].method;
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Selected "
|
|
"Phase 2 EAP vendor %d method %d",
|
|
data->phase2_eap_type.vendor,
|
|
data->phase2_eap_type.method);
|
|
break;
|
|
}
|
|
}
|
|
if (*pos != data->phase2_eap_type.method ||
|
|
*pos == EAP_TYPE_NONE) {
|
|
if (eap_ttls_phase2_nak(data, hdr, resp, resp_len))
|
|
return -1;
|
|
break;
|
|
}
|
|
|
|
if (data->phase2_priv == NULL) {
|
|
data->phase2_method = eap_sm_get_eap_methods(
|
|
EAP_VENDOR_IETF, *pos);
|
|
if (data->phase2_method) {
|
|
sm->init_phase2 = 1;
|
|
sm->mschapv2_full_key = 1;
|
|
data->phase2_priv =
|
|
data->phase2_method->init(sm);
|
|
sm->init_phase2 = 0;
|
|
sm->mschapv2_full_key = 0;
|
|
}
|
|
}
|
|
if (data->phase2_priv == NULL || data->phase2_method == NULL) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: failed to initialize "
|
|
"Phase 2 EAP method %d", *pos);
|
|
return -1;
|
|
}
|
|
os_memset(&iret, 0, sizeof(iret));
|
|
*resp = data->phase2_method->process(sm, data->phase2_priv,
|
|
&iret, (u8 *) hdr, len,
|
|
resp_len);
|
|
if ((iret.methodState == METHOD_DONE ||
|
|
iret.methodState == METHOD_MAY_CONT) &&
|
|
(iret.decision == DECISION_UNCOND_SUCC ||
|
|
iret.decision == DECISION_COND_SUCC ||
|
|
iret.decision == DECISION_FAIL)) {
|
|
ret->methodState = iret.methodState;
|
|
ret->decision = iret.decision;
|
|
}
|
|
if (data->ttls_version > 0) {
|
|
const struct eap_method *m = data->phase2_method;
|
|
void *priv = data->phase2_priv;
|
|
|
|
/* TTLSv1 requires TLS/IA FinalPhaseFinished */
|
|
if (ret->decision == DECISION_UNCOND_SUCC)
|
|
ret->decision = DECISION_COND_SUCC;
|
|
ret->methodState = METHOD_CONT;
|
|
|
|
if (ret->decision == DECISION_COND_SUCC &&
|
|
m->isKeyAvailable && m->getKey &&
|
|
m->isKeyAvailable(sm, priv)) {
|
|
u8 *key;
|
|
size_t key_len;
|
|
key = m->getKey(sm, priv, &key_len);
|
|
if (key) {
|
|
eap_ttls_ia_permute_inner_secret(
|
|
sm, data, key, key_len);
|
|
os_free(key);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (*resp == NULL &&
|
|
(config->pending_req_identity || config->pending_req_password ||
|
|
config->pending_req_otp)) {
|
|
return 0;
|
|
}
|
|
|
|
if (*resp == NULL)
|
|
return -1;
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP encapsulate EAP Response",
|
|
*resp, *resp_len);
|
|
return eap_ttls_avp_encapsulate(resp, resp_len,
|
|
RADIUS_ATTR_EAP_MESSAGE, 1);
|
|
}
|
|
|
|
|
|
static int eap_ttls_phase2_request_mschapv2(struct eap_sm *sm,
|
|
struct eap_ttls_data *data,
|
|
struct eap_method_ret *ret,
|
|
u8 **resp, size_t *resp_len)
|
|
{
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
u8 *buf, *pos, *challenge, *username, *peer_challenge;
|
|
size_t username_len, i;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAPV2 Request");
|
|
|
|
/* MSCHAPv2 does not include optional domain name in the
|
|
* challenge-response calculation, so remove domain prefix
|
|
* (if present). */
|
|
username = config->identity;
|
|
username_len = config->identity_len;
|
|
pos = username;
|
|
for (i = 0; i < username_len; i++) {
|
|
if (username[i] == '\\') {
|
|
username_len -= i + 1;
|
|
username += i + 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
pos = buf = os_malloc(config->identity_len + 1000);
|
|
if (buf == NULL) {
|
|
wpa_printf(MSG_ERROR,
|
|
"EAP-TTLS/MSCHAPV2: Failed to allocate memory");
|
|
return -1;
|
|
}
|
|
|
|
/* User-Name */
|
|
pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
|
|
config->identity, config->identity_len);
|
|
|
|
/* MS-CHAP-Challenge */
|
|
challenge = eap_ttls_implicit_challenge(
|
|
sm, data, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN + 1);
|
|
if (challenge == NULL) {
|
|
os_free(buf);
|
|
wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAPV2: Failed to derive "
|
|
"implicit challenge");
|
|
return -1;
|
|
}
|
|
peer_challenge = challenge + 1 + EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
|
|
|
|
pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
|
|
RADIUS_VENDOR_ID_MICROSOFT, 1,
|
|
challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
|
|
|
|
/* MS-CHAP2-Response */
|
|
pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP2_RESPONSE,
|
|
RADIUS_VENDOR_ID_MICROSOFT, 1,
|
|
EAP_TTLS_MSCHAPV2_RESPONSE_LEN);
|
|
data->ident = challenge[EAP_TTLS_MSCHAPV2_CHALLENGE_LEN];
|
|
*pos++ = data->ident;
|
|
*pos++ = 0; /* Flags */
|
|
os_memcpy(pos, peer_challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
|
|
pos += EAP_TTLS_MSCHAPV2_CHALLENGE_LEN;
|
|
os_memset(pos, 0, 8); /* Reserved, must be zero */
|
|
pos += 8;
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAPV2: implicit auth_challenge",
|
|
challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAPV2: peer_challenge",
|
|
peer_challenge, EAP_TTLS_MSCHAPV2_CHALLENGE_LEN);
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: MSCHAPV2 username",
|
|
username, username_len);
|
|
wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAPV2 password",
|
|
config->password, config->password_len);
|
|
generate_nt_response(challenge, peer_challenge,
|
|
username, username_len,
|
|
config->password, config->password_len,
|
|
pos);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAPV2 response", pos, 24);
|
|
generate_authenticator_response(config->password, config->password_len,
|
|
peer_challenge, challenge,
|
|
username, username_len,
|
|
pos, data->auth_response);
|
|
data->auth_response_valid = 1;
|
|
|
|
if (data->ttls_version > 0) {
|
|
u8 pw_hash[16], pw_hash_hash[16], master_key[16];
|
|
u8 session_key[2 * MSCHAPV2_KEY_LEN];
|
|
nt_password_hash(config->password, config->password_len,
|
|
pw_hash);
|
|
hash_nt_password_hash(pw_hash, pw_hash_hash);
|
|
get_master_key(pw_hash_hash, pos /* nt_response */,
|
|
master_key);
|
|
get_asymetric_start_key(master_key, session_key,
|
|
MSCHAPV2_KEY_LEN, 0, 0);
|
|
get_asymetric_start_key(master_key,
|
|
session_key + MSCHAPV2_KEY_LEN,
|
|
MSCHAPV2_KEY_LEN, 1, 0);
|
|
eap_ttls_ia_permute_inner_secret(sm, data,
|
|
session_key,
|
|
sizeof(session_key));
|
|
}
|
|
|
|
pos += 24;
|
|
os_free(challenge);
|
|
AVP_PAD(buf, pos);
|
|
|
|
*resp = buf;
|
|
*resp_len = pos - buf;
|
|
|
|
if (sm->workaround && data->ttls_version == 0) {
|
|
/* At least FreeRADIUS seems to be terminating
|
|
* EAP-TTLS/MSHCAPV2 without the expected MS-CHAP-v2 Success
|
|
* packet. */
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: EAP workaround - "
|
|
"allow success without tunneled response");
|
|
ret->methodState = METHOD_MAY_CONT;
|
|
ret->decision = DECISION_COND_SUCC;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eap_ttls_phase2_request_mschap(struct eap_sm *sm,
|
|
struct eap_ttls_data *data,
|
|
struct eap_method_ret *ret,
|
|
u8 **resp, size_t *resp_len)
|
|
{
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
u8 *buf, *pos, *challenge;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 MSCHAP Request");
|
|
|
|
pos = buf = os_malloc(config->identity_len + 1000);
|
|
if (buf == NULL) {
|
|
wpa_printf(MSG_ERROR,
|
|
"EAP-TTLS/MSCHAP: Failed to allocate memory");
|
|
return -1;
|
|
}
|
|
|
|
/* User-Name */
|
|
pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
|
|
config->identity, config->identity_len);
|
|
|
|
/* MS-CHAP-Challenge */
|
|
challenge = eap_ttls_implicit_challenge(
|
|
sm, data, EAP_TTLS_MSCHAP_CHALLENGE_LEN + 1);
|
|
if (challenge == NULL) {
|
|
os_free(buf);
|
|
wpa_printf(MSG_ERROR, "EAP-TTLS/MSCHAP: Failed to derive "
|
|
"implicit challenge");
|
|
return -1;
|
|
}
|
|
|
|
pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_MS_CHAP_CHALLENGE,
|
|
RADIUS_VENDOR_ID_MICROSOFT, 1,
|
|
challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
|
|
|
|
/* MS-CHAP-Response */
|
|
pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_MS_CHAP_RESPONSE,
|
|
RADIUS_VENDOR_ID_MICROSOFT, 1,
|
|
EAP_TTLS_MSCHAP_RESPONSE_LEN);
|
|
data->ident = challenge[EAP_TTLS_MSCHAP_CHALLENGE_LEN];
|
|
*pos++ = data->ident;
|
|
*pos++ = 1; /* Flags: Use NT style passwords */
|
|
os_memset(pos, 0, 24); /* LM-Response */
|
|
pos += 24;
|
|
nt_challenge_response(challenge,
|
|
config->password, config->password_len,
|
|
pos); /* NT-Response */
|
|
wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: MSCHAP password",
|
|
config->password, config->password_len);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP implicit challenge",
|
|
challenge, EAP_TTLS_MSCHAP_CHALLENGE_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: MSCHAP response", pos, 24);
|
|
pos += 24;
|
|
os_free(challenge);
|
|
AVP_PAD(buf, pos);
|
|
|
|
*resp = buf;
|
|
*resp_len = pos - buf;
|
|
|
|
if (data->ttls_version > 0) {
|
|
/* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
|
|
* so do not allow connection to be terminated yet. */
|
|
ret->methodState = METHOD_CONT;
|
|
ret->decision = DECISION_COND_SUCC;
|
|
} else {
|
|
/* EAP-TTLS/MSCHAP does not provide tunneled success
|
|
* notification, so assume that Phase2 succeeds. */
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_COND_SUCC;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eap_ttls_phase2_request_pap(struct eap_sm *sm,
|
|
struct eap_ttls_data *data,
|
|
struct eap_method_ret *ret,
|
|
u8 **resp, size_t *resp_len)
|
|
{
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
u8 *buf, *pos;
|
|
size_t pad;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 PAP Request");
|
|
|
|
pos = buf = os_malloc(config->identity_len + config->password_len +
|
|
100);
|
|
if (buf == NULL) {
|
|
wpa_printf(MSG_ERROR,
|
|
"EAP-TTLS/PAP: Failed to allocate memory");
|
|
return -1;
|
|
}
|
|
|
|
/* User-Name */
|
|
pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
|
|
config->identity, config->identity_len);
|
|
|
|
/* User-Password; in RADIUS, this is encrypted, but EAP-TTLS encrypts
|
|
* the data, so no separate encryption is used in the AVP itself.
|
|
* However, the password is padded to obfuscate its length. */
|
|
pad = (16 - (config->password_len & 15)) & 15;
|
|
pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_USER_PASSWORD, 0, 1,
|
|
config->password_len + pad);
|
|
os_memcpy(pos, config->password, config->password_len);
|
|
pos += config->password_len;
|
|
os_memset(pos, 0, pad);
|
|
pos += pad;
|
|
AVP_PAD(buf, pos);
|
|
|
|
*resp = buf;
|
|
*resp_len = pos - buf;
|
|
|
|
if (data->ttls_version > 0) {
|
|
/* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
|
|
* so do not allow connection to be terminated yet. */
|
|
ret->methodState = METHOD_CONT;
|
|
ret->decision = DECISION_COND_SUCC;
|
|
} else {
|
|
/* EAP-TTLS/PAP does not provide tunneled success notification,
|
|
* so assume that Phase2 succeeds. */
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_COND_SUCC;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eap_ttls_phase2_request_chap(struct eap_sm *sm,
|
|
struct eap_ttls_data *data,
|
|
struct eap_method_ret *ret,
|
|
u8 **resp, size_t *resp_len)
|
|
{
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
u8 *buf, *pos, *challenge;
|
|
const u8 *addr[3];
|
|
size_t len[3];
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Phase 2 CHAP Request");
|
|
|
|
pos = buf = os_malloc(config->identity_len + 1000);
|
|
if (buf == NULL) {
|
|
wpa_printf(MSG_ERROR,
|
|
"EAP-TTLS/CHAP: Failed to allocate memory");
|
|
return -1;
|
|
}
|
|
|
|
/* User-Name */
|
|
pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_USER_NAME, 0, 1,
|
|
config->identity, config->identity_len);
|
|
|
|
/* CHAP-Challenge */
|
|
challenge = eap_ttls_implicit_challenge(
|
|
sm, data, EAP_TTLS_CHAP_CHALLENGE_LEN + 1);
|
|
if (challenge == NULL) {
|
|
os_free(buf);
|
|
wpa_printf(MSG_ERROR, "EAP-TTLS/CHAP: Failed to derive "
|
|
"implicit challenge");
|
|
return -1;
|
|
}
|
|
|
|
pos = eap_ttls_avp_add(buf, pos, RADIUS_ATTR_CHAP_CHALLENGE, 0, 1,
|
|
challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
|
|
|
|
/* CHAP-Password */
|
|
pos = eap_ttls_avp_hdr(pos, RADIUS_ATTR_CHAP_PASSWORD, 0, 1,
|
|
1 + EAP_TTLS_CHAP_PASSWORD_LEN);
|
|
data->ident = challenge[EAP_TTLS_CHAP_CHALLENGE_LEN];
|
|
*pos++ = data->ident;
|
|
|
|
/* MD5(Ident + Password + Challenge) */
|
|
addr[0] = &data->ident;
|
|
len[0] = 1;
|
|
addr[1] = config->password;
|
|
len[1] = config->password_len;
|
|
addr[2] = challenge;
|
|
len[2] = EAP_TTLS_CHAP_CHALLENGE_LEN;
|
|
md5_vector(3, addr, len, pos);
|
|
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: CHAP username",
|
|
config->identity, config->identity_len);
|
|
wpa_hexdump_ascii_key(MSG_DEBUG, "EAP-TTLS: CHAP password",
|
|
config->password, config->password_len);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP implicit challenge",
|
|
challenge, EAP_TTLS_CHAP_CHALLENGE_LEN);
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: CHAP password",
|
|
pos, EAP_TTLS_CHAP_PASSWORD_LEN);
|
|
pos += EAP_TTLS_CHAP_PASSWORD_LEN;
|
|
os_free(challenge);
|
|
AVP_PAD(buf, pos);
|
|
|
|
*resp = buf;
|
|
*resp_len = pos - buf;
|
|
|
|
if (data->ttls_version > 0) {
|
|
/* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report success,
|
|
* so do not allow connection to be terminated yet. */
|
|
ret->methodState = METHOD_CONT;
|
|
ret->decision = DECISION_COND_SUCC;
|
|
} else {
|
|
/* EAP-TTLS/CHAP does not provide tunneled success
|
|
* notification, so assume that Phase2 succeeds. */
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_COND_SUCC;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int eap_ttls_phase2_request(struct eap_sm *sm,
|
|
struct eap_ttls_data *data,
|
|
struct eap_method_ret *ret,
|
|
const struct eap_hdr *req,
|
|
struct eap_hdr *hdr,
|
|
u8 **resp, size_t *resp_len)
|
|
{
|
|
int res = 0;
|
|
size_t len;
|
|
|
|
if (data->phase2_type == EAP_TTLS_PHASE2_MSCHAPV2 ||
|
|
data->phase2_type == EAP_TTLS_PHASE2_MSCHAP ||
|
|
data->phase2_type == EAP_TTLS_PHASE2_PAP ||
|
|
data->phase2_type == EAP_TTLS_PHASE2_CHAP) {
|
|
if (eap_get_config_identity(sm, &len) == NULL) {
|
|
wpa_printf(MSG_INFO,
|
|
"EAP-TTLS: Identity not configured");
|
|
eap_sm_request_identity(sm);
|
|
if (eap_get_config_password(sm, &len) == NULL)
|
|
eap_sm_request_password(sm);
|
|
return 0;
|
|
}
|
|
|
|
if (eap_get_config_password(sm, &len) == NULL) {
|
|
wpa_printf(MSG_INFO,
|
|
"EAP-TTLS: Password not configured");
|
|
eap_sm_request_password(sm);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
switch (data->phase2_type) {
|
|
case EAP_TTLS_PHASE2_EAP:
|
|
res = eap_ttls_phase2_request_eap(sm, data, ret, hdr,
|
|
resp, resp_len);
|
|
break;
|
|
case EAP_TTLS_PHASE2_MSCHAPV2:
|
|
res = eap_ttls_phase2_request_mschapv2(sm, data, ret,
|
|
resp, resp_len);
|
|
break;
|
|
case EAP_TTLS_PHASE2_MSCHAP:
|
|
res = eap_ttls_phase2_request_mschap(sm, data, ret,
|
|
resp, resp_len);
|
|
break;
|
|
case EAP_TTLS_PHASE2_PAP:
|
|
res = eap_ttls_phase2_request_pap(sm, data, ret,
|
|
resp, resp_len);
|
|
break;
|
|
case EAP_TTLS_PHASE2_CHAP:
|
|
res = eap_ttls_phase2_request_chap(sm, data, ret,
|
|
resp, resp_len);
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_ERROR, "EAP-TTLS: Phase 2 - Unknown");
|
|
res = -1;
|
|
break;
|
|
}
|
|
|
|
if (res < 0) {
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
static u8 * eap_ttls_build_phase_finished(struct eap_sm *sm,
|
|
struct eap_ttls_data *data,
|
|
int id, int final,
|
|
size_t *reqDataLen)
|
|
{
|
|
int len;
|
|
struct eap_hdr *req;
|
|
u8 *pos;
|
|
const int max_len = 300;
|
|
|
|
len = sizeof(struct eap_hdr) + 2 + max_len;
|
|
req = os_malloc(len);
|
|
if (req == NULL)
|
|
return NULL;
|
|
|
|
req->code = EAP_CODE_RESPONSE;
|
|
req->identifier = id;
|
|
|
|
pos = (u8 *) (req + 1);
|
|
*pos++ = EAP_TYPE_TTLS;
|
|
*pos++ = data->ttls_version;
|
|
|
|
len = tls_connection_ia_send_phase_finished(sm->ssl_ctx,
|
|
data->ssl.conn,
|
|
final, pos, max_len);
|
|
if (len < 0) {
|
|
os_free(req);
|
|
return NULL;
|
|
}
|
|
|
|
*reqDataLen = sizeof(struct eap_hdr) + 2 + len;
|
|
req->length = host_to_be16(*reqDataLen);
|
|
|
|
return (u8 *) req;
|
|
}
|
|
|
|
|
|
static int eap_ttls_decrypt(struct eap_sm *sm, struct eap_ttls_data *data,
|
|
struct eap_method_ret *ret,
|
|
const struct eap_hdr *req,
|
|
const u8 *in_data, size_t in_len,
|
|
u8 **out_data, size_t *out_len)
|
|
{
|
|
u8 *in_decrypted = NULL, *pos;
|
|
int res, retval = 0;
|
|
struct eap_hdr *hdr = NULL;
|
|
u8 *resp = NULL, *mschapv2 = NULL, *eapdata = NULL;
|
|
size_t resp_len, eap_len = 0, len_decrypted = 0, len, buf_len, left;
|
|
struct ttls_avp *avp;
|
|
u8 recv_response[20];
|
|
int mschapv2_error = 0;
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
const u8 *msg;
|
|
size_t msg_len;
|
|
int need_more_input;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: received %lu bytes encrypted data for"
|
|
" Phase 2", (unsigned long) in_len);
|
|
|
|
if (data->pending_phase2_req) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Pending Phase 2 request - "
|
|
"skip decryption and use old data");
|
|
/* Clear TLS reassembly state. */
|
|
os_free(data->ssl.tls_in);
|
|
data->ssl.tls_in = NULL;
|
|
data->ssl.tls_in_len = 0;
|
|
data->ssl.tls_in_left = 0;
|
|
data->ssl.tls_in_total = 0;
|
|
|
|
in_decrypted = data->pending_phase2_req;
|
|
data->pending_phase2_req = NULL;
|
|
len_decrypted = data->pending_phase2_req_len;
|
|
if (data->pending_phase2_req_len == 0) {
|
|
os_free(in_decrypted);
|
|
in_decrypted = NULL;
|
|
goto fake_req_identity;
|
|
}
|
|
goto continue_req;
|
|
}
|
|
|
|
if (in_len == 0 && data->phase2_start) {
|
|
data->phase2_start = 0;
|
|
/* EAP-TTLS does not use Phase2 on fast re-auth; this must be
|
|
* done only if TLS part was indeed resuming a previous
|
|
* session. Most Authentication Servers terminate EAP-TTLS
|
|
* before reaching this point, but some do not. Make
|
|
* wpa_supplicant stop phase 2 here, if needed. */
|
|
if (data->reauth &&
|
|
tls_connection_resumed(sm->ssl_ctx, data->ssl.conn)) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Session resumption - "
|
|
"skip phase 2");
|
|
*out_data = eap_tls_build_ack(&data->ssl, out_len,
|
|
req->identifier,
|
|
EAP_TYPE_TTLS, 0);
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_UNCOND_SUCC;
|
|
data->phase2_success = 1;
|
|
return 0;
|
|
}
|
|
fake_req_identity:
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: empty data in beginning of "
|
|
"Phase 2 - use fake EAP-Request Identity");
|
|
buf_len = sizeof(*hdr) + 1;
|
|
in_decrypted = os_malloc(buf_len);
|
|
if (in_decrypted == NULL) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate "
|
|
"memory for fake EAP-Identity Request");
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
hdr = (struct eap_hdr *) in_decrypted;
|
|
hdr->code = EAP_CODE_REQUEST;
|
|
hdr->identifier = 0;
|
|
hdr->length = host_to_be16(sizeof(*hdr) + 1);
|
|
in_decrypted[sizeof(*hdr)] = EAP_TYPE_IDENTITY;
|
|
goto process_eap;
|
|
}
|
|
|
|
msg = eap_tls_data_reassemble(sm, &data->ssl, in_data, in_len,
|
|
&msg_len, &need_more_input);
|
|
if (msg == NULL)
|
|
return need_more_input ? 1 : -1;
|
|
|
|
buf_len = in_len;
|
|
if (data->ssl.tls_in_total > buf_len)
|
|
buf_len = data->ssl.tls_in_total;
|
|
in_decrypted = os_malloc(buf_len);
|
|
if (in_decrypted == NULL) {
|
|
os_free(data->ssl.tls_in);
|
|
data->ssl.tls_in = NULL;
|
|
data->ssl.tls_in_len = 0;
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: failed to allocate memory "
|
|
"for decryption");
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
|
|
res = tls_connection_decrypt(sm->ssl_ctx, data->ssl.conn,
|
|
msg, msg_len, in_decrypted, buf_len);
|
|
os_free(data->ssl.tls_in);
|
|
data->ssl.tls_in = NULL;
|
|
data->ssl.tls_in_len = 0;
|
|
if (res < 0) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Failed to decrypt Phase 2 "
|
|
"data");
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
len_decrypted = res;
|
|
|
|
if (data->ttls_version > 0 && len_decrypted == 0 &&
|
|
tls_connection_ia_final_phase_finished(sm->ssl_ctx,
|
|
data->ssl.conn)) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: FinalPhaseFinished received");
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: TLS/IA authentication "
|
|
"succeeded");
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_UNCOND_SUCC;
|
|
data->phase2_success = 1;
|
|
*out_data = eap_ttls_build_phase_finished(sm, data,
|
|
req->identifier, 1,
|
|
out_len);
|
|
eap_ttls_v1_derive_key(sm, data);
|
|
goto done;
|
|
}
|
|
|
|
continue_req:
|
|
data->phase2_start = 0;
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Decrypted Phase 2 AVPs",
|
|
in_decrypted, len_decrypted);
|
|
if (len_decrypted < sizeof(struct ttls_avp)) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 AVP frame"
|
|
" len=%lu expected %lu or more - dropped",
|
|
(unsigned long) len_decrypted,
|
|
(unsigned long) sizeof(struct ttls_avp));
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
|
|
/* Parse AVPs */
|
|
pos = in_decrypted;
|
|
left = len_decrypted;
|
|
mschapv2 = NULL;
|
|
|
|
while (left > 0) {
|
|
u32 avp_code, avp_length, vendor_id = 0;
|
|
u8 avp_flags, *dpos;
|
|
size_t pad, dlen;
|
|
avp = (struct ttls_avp *) pos;
|
|
avp_code = be_to_host32(avp->avp_code);
|
|
avp_length = be_to_host32(avp->avp_length);
|
|
avp_flags = (avp_length >> 24) & 0xff;
|
|
avp_length &= 0xffffff;
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP: code=%d flags=0x%02x "
|
|
"length=%d", (int) avp_code, avp_flags,
|
|
(int) avp_length);
|
|
if (avp_length > left) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: AVP overflow "
|
|
"(len=%d, left=%lu) - dropped",
|
|
(int) avp_length, (unsigned long) left);
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
if (avp_length < sizeof(*avp)) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid AVP length "
|
|
"%d", avp_length);
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
dpos = (u8 *) (avp + 1);
|
|
dlen = avp_length - sizeof(*avp);
|
|
if (avp_flags & AVP_FLAGS_VENDOR) {
|
|
if (dlen < 4) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: vendor AVP "
|
|
"underflow");
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
vendor_id = be_to_host32(* (u32 *) dpos);
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP vendor_id %d",
|
|
(int) vendor_id);
|
|
dpos += 4;
|
|
dlen -= 4;
|
|
}
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: AVP data", dpos, dlen);
|
|
|
|
if (vendor_id == 0 && avp_code == RADIUS_ATTR_EAP_MESSAGE) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: AVP - EAP Message");
|
|
if (eapdata == NULL) {
|
|
eapdata = os_malloc(dlen);
|
|
if (eapdata == NULL) {
|
|
retval = -1;
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: "
|
|
"failed to allocate memory "
|
|
"for Phase 2 EAP data");
|
|
goto done;
|
|
}
|
|
os_memcpy(eapdata, dpos, dlen);
|
|
eap_len = dlen;
|
|
} else {
|
|
u8 *neweap = os_realloc(eapdata,
|
|
eap_len + dlen);
|
|
if (neweap == NULL) {
|
|
retval = -1;
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: "
|
|
"failed to allocate memory "
|
|
"for Phase 2 EAP data");
|
|
goto done;
|
|
}
|
|
os_memcpy(neweap + eap_len, dpos, dlen);
|
|
eapdata = neweap;
|
|
eap_len += dlen;
|
|
}
|
|
} else if (vendor_id == 0 &&
|
|
avp_code == RADIUS_ATTR_REPLY_MESSAGE) {
|
|
/* This is an optional message that can be displayed to
|
|
* the user. */
|
|
wpa_hexdump_ascii(MSG_DEBUG,
|
|
"EAP-TTLS: AVP - Reply-Message",
|
|
dpos, dlen);
|
|
} else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
|
|
avp_code == RADIUS_ATTR_MS_CHAP2_SUCCESS) {
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: "
|
|
"MS-CHAP2-Success", dpos, dlen);
|
|
if (dlen != 43) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: Unexpected "
|
|
"MS-CHAP2-Success length "
|
|
"(len=%lu, expected 43)",
|
|
(unsigned long) dlen);
|
|
retval = -1;
|
|
break;
|
|
}
|
|
mschapv2 = dpos;
|
|
} else if (vendor_id == RADIUS_VENDOR_ID_MICROSOFT &&
|
|
avp_code == RADIUS_ATTR_MS_CHAP_ERROR) {
|
|
wpa_hexdump_ascii(MSG_DEBUG, "EAP-TTLS: "
|
|
"MS-CHAP-Error", dpos, dlen);
|
|
mschapv2_error = 1;
|
|
} else if (avp_flags & AVP_FLAGS_MANDATORY) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: Unsupported "
|
|
"mandatory AVP code %d vendor_id %d - "
|
|
"dropped", (int) avp_code, (int) vendor_id);
|
|
retval = -1;
|
|
goto done;
|
|
} else {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Ignoring unsupported "
|
|
"AVP code %d vendor_id %d",
|
|
(int) avp_code, (int) vendor_id);
|
|
}
|
|
|
|
pad = (4 - (avp_length & 3)) & 3;
|
|
pos += avp_length + pad;
|
|
if (left < avp_length + pad)
|
|
left = 0;
|
|
else
|
|
left -= avp_length + pad;
|
|
}
|
|
|
|
switch (data->phase2_type) {
|
|
case EAP_TTLS_PHASE2_EAP:
|
|
if (eapdata == NULL) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: No EAP Message in "
|
|
"the packet - dropped");
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
|
|
wpa_hexdump(MSG_DEBUG, "EAP-TTLS: Phase 2 EAP",
|
|
eapdata, eap_len);
|
|
hdr = (struct eap_hdr *) eapdata;
|
|
|
|
if (eap_len < sizeof(*hdr)) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: Too short Phase 2 "
|
|
"EAP frame (len=%lu, expected %lu or more) "
|
|
"- dropped", (unsigned long) eap_len,
|
|
(unsigned long) sizeof(*hdr));
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
len = be_to_host16(hdr->length);
|
|
if (len > eap_len) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Length mismatch in "
|
|
"Phase 2 EAP frame (EAP hdr len=%lu, EAP "
|
|
"data len in AVP=%lu)",
|
|
(unsigned long) len,
|
|
(unsigned long) eap_len);
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: received Phase 2: code=%d "
|
|
"identifier=%d length=%lu",
|
|
hdr->code, hdr->identifier, (unsigned long) len);
|
|
process_eap:
|
|
switch (hdr->code) {
|
|
case EAP_CODE_REQUEST:
|
|
if (eap_ttls_phase2_request(sm, data, ret, req, hdr,
|
|
&resp, &resp_len)) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Phase2 "
|
|
"Request processing failed");
|
|
retval = -1;
|
|
goto done;
|
|
}
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Unexpected code=%d in "
|
|
"Phase 2 EAP header", hdr->code);
|
|
retval = -1;
|
|
break;
|
|
}
|
|
break;
|
|
case EAP_TTLS_PHASE2_MSCHAPV2:
|
|
if (mschapv2_error) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2: Received "
|
|
"MS-CHAP-Error - failed");
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
*out_data = eap_tls_build_ack(&data->ssl, out_len,
|
|
req->identifier,
|
|
EAP_TYPE_TTLS, 0);
|
|
break;
|
|
}
|
|
|
|
if (mschapv2 == NULL) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: no MS-CHAP2-Success"
|
|
" AVP received for Phase2 MSCHAPV2");
|
|
retval = -1;
|
|
break;
|
|
}
|
|
if (mschapv2[0] != data->ident) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: Ident mismatch "
|
|
"for Phase 2 MSCHAPV2 (received Ident "
|
|
"0x%02x, expected 0x%02x)",
|
|
mschapv2[0], data->ident);
|
|
retval = -1;
|
|
break;
|
|
}
|
|
if (!data->auth_response_valid ||
|
|
mschapv2[1] != 'S' || mschapv2[2] != '=' ||
|
|
hexstr2bin((char *) (mschapv2 + 3), recv_response, 20) ||
|
|
os_memcmp(data->auth_response, recv_response, 20) != 0) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: Invalid "
|
|
"authenticator response in Phase 2 "
|
|
"MSCHAPV2 success request");
|
|
retval = -1;
|
|
break;
|
|
}
|
|
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 MSCHAPV2 "
|
|
"authentication succeeded");
|
|
if (data->ttls_version > 0) {
|
|
/* EAP-TTLSv1 uses TLS/IA FinalPhaseFinished to report
|
|
* success, so do not allow connection to be terminated
|
|
* yet. */
|
|
ret->methodState = METHOD_CONT;
|
|
ret->decision = DECISION_COND_SUCC;
|
|
} else {
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_UNCOND_SUCC;
|
|
data->phase2_success = 1;
|
|
}
|
|
|
|
/* Reply with empty data; authentication server will reply
|
|
* with EAP-Success after this. */
|
|
retval = 1;
|
|
goto done;
|
|
case EAP_TTLS_PHASE2_MSCHAP:
|
|
case EAP_TTLS_PHASE2_PAP:
|
|
case EAP_TTLS_PHASE2_CHAP:
|
|
/* EAP-TTLS/{MSCHAP,PAP,CHAP} should not send any TLS tunneled
|
|
* requests to the supplicant */
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Phase 2 received unexpected "
|
|
"tunneled data");
|
|
retval = -1;
|
|
break;
|
|
}
|
|
|
|
if (resp) {
|
|
wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Encrypting Phase 2 data",
|
|
resp, resp_len);
|
|
|
|
if (eap_ttls_encrypt(sm, data, req->identifier,
|
|
resp, resp_len, out_data, out_len)) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Failed to encrypt "
|
|
"a Phase 2 frame");
|
|
}
|
|
os_free(resp);
|
|
} else if (config->pending_req_identity ||
|
|
config->pending_req_password ||
|
|
config->pending_req_otp ||
|
|
config->pending_req_new_password) {
|
|
os_free(data->pending_phase2_req);
|
|
data->pending_phase2_req = os_malloc(len_decrypted);
|
|
if (data->pending_phase2_req) {
|
|
os_memcpy(data->pending_phase2_req, in_decrypted,
|
|
len_decrypted);
|
|
data->pending_phase2_req_len = len_decrypted;
|
|
}
|
|
}
|
|
|
|
done:
|
|
os_free(in_decrypted);
|
|
os_free(eapdata);
|
|
|
|
if (retval < 0) {
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static u8 * eap_ttls_process(struct eap_sm *sm, void *priv,
|
|
struct eap_method_ret *ret,
|
|
const u8 *reqData, size_t reqDataLen,
|
|
size_t *respDataLen)
|
|
{
|
|
const struct eap_hdr *req;
|
|
size_t left;
|
|
int res;
|
|
u8 flags, *resp, id;
|
|
const u8 *pos;
|
|
struct eap_ttls_data *data = priv;
|
|
struct wpa_ssid *config = eap_get_config(sm);
|
|
|
|
pos = eap_tls_process_init(sm, &data->ssl, EAP_TYPE_TTLS, ret,
|
|
reqData, reqDataLen, &left, &flags);
|
|
if (pos == NULL)
|
|
return NULL;
|
|
req = (const struct eap_hdr *) reqData;
|
|
id = req->identifier;
|
|
|
|
if (flags & EAP_TLS_FLAGS_START) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Start (server ver=%d, own "
|
|
"ver=%d)", flags & EAP_PEAP_VERSION_MASK,
|
|
data->ttls_version);
|
|
if ((flags & EAP_PEAP_VERSION_MASK) < data->ttls_version)
|
|
data->ttls_version = flags & EAP_PEAP_VERSION_MASK;
|
|
if (data->force_ttls_version >= 0 &&
|
|
data->force_ttls_version != data->ttls_version) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: Failed to select "
|
|
"forced TTLS version %d",
|
|
data->force_ttls_version);
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
ret->allowNotifications = FALSE;
|
|
return NULL;
|
|
}
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Using TTLS version %d",
|
|
data->ttls_version);
|
|
|
|
if (data->ttls_version > 0)
|
|
data->ssl.tls_ia = 1;
|
|
if (!data->ssl_initialized &&
|
|
eap_tls_ssl_init(sm, &data->ssl, config)) {
|
|
wpa_printf(MSG_INFO, "EAP-TTLS: Failed to initialize "
|
|
"SSL.");
|
|
return NULL;
|
|
}
|
|
data->ssl_initialized = 1;
|
|
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Start");
|
|
/* draft-ietf-pppext-eap-ttls-03.txt, Ch. 8.1:
|
|
* EAP-TTLS Start packet may, in a future specification, be
|
|
* allowed to contain data. Client based on this draft version
|
|
* must ignore such data but must not reject the Start packet.
|
|
*/
|
|
left = 0;
|
|
} else if (!data->ssl_initialized) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: First message did not "
|
|
"include Start flag");
|
|
ret->methodState = METHOD_DONE;
|
|
ret->decision = DECISION_FAIL;
|
|
ret->allowNotifications = FALSE;
|
|
return NULL;
|
|
}
|
|
|
|
resp = NULL;
|
|
if (tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
|
|
!data->resuming) {
|
|
res = eap_ttls_decrypt(sm, data, ret, req, pos, left,
|
|
&resp, respDataLen);
|
|
} else {
|
|
res = eap_tls_process_helper(sm, &data->ssl, EAP_TYPE_TTLS,
|
|
data->ttls_version, id, pos, left,
|
|
&resp, respDataLen);
|
|
|
|
if (tls_connection_established(sm->ssl_ctx, data->ssl.conn)) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"EAP-TTLS: TLS done, proceed to Phase 2");
|
|
if (data->resuming) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: fast reauth -"
|
|
" may skip Phase 2");
|
|
ret->decision = DECISION_COND_SUCC;
|
|
ret->methodState = METHOD_MAY_CONT;
|
|
}
|
|
data->phase2_start = 1;
|
|
if (data->ttls_version == 0)
|
|
eap_ttls_v0_derive_key(sm, data);
|
|
|
|
if (*respDataLen == 0) {
|
|
if (eap_ttls_decrypt(sm, data, ret, req, NULL,
|
|
0, &resp, respDataLen)) {
|
|
wpa_printf(MSG_WARNING, "EAP-TTLS: "
|
|
"failed to process early "
|
|
"start for Phase 2");
|
|
}
|
|
res = 0;
|
|
}
|
|
data->resuming = 0;
|
|
}
|
|
|
|
if (res == 2) {
|
|
/*
|
|
* Application data included in the handshake message.
|
|
*/
|
|
os_free(data->pending_phase2_req);
|
|
data->pending_phase2_req = resp;
|
|
data->pending_phase2_req_len = *respDataLen;
|
|
resp = NULL;
|
|
*respDataLen = 0;
|
|
res = eap_ttls_decrypt(sm, data, ret, req, pos, left,
|
|
&resp, respDataLen);
|
|
}
|
|
}
|
|
|
|
if (data->ttls_version == 0 && ret->methodState == METHOD_DONE) {
|
|
ret->allowNotifications = FALSE;
|
|
if (ret->decision == DECISION_UNCOND_SUCC ||
|
|
ret->decision == DECISION_COND_SUCC) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
|
|
"completed successfully");
|
|
data->phase2_success = 1;
|
|
}
|
|
} else if (data->ttls_version == 0 && sm->workaround &&
|
|
ret->methodState == METHOD_MAY_CONT &&
|
|
(ret->decision == DECISION_UNCOND_SUCC ||
|
|
ret->decision == DECISION_COND_SUCC)) {
|
|
wpa_printf(MSG_DEBUG, "EAP-TTLS: Authentication "
|
|
"completed successfully (EAP workaround)");
|
|
data->phase2_success = 1;
|
|
}
|
|
|
|
if (res == 1) {
|
|
return eap_tls_build_ack(&data->ssl, respDataLen, id,
|
|
EAP_TYPE_TTLS, data->ttls_version);
|
|
}
|
|
return resp;
|
|
}
|
|
|
|
|
|
static Boolean eap_ttls_has_reauth_data(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_ttls_data *data = priv;
|
|
return tls_connection_established(sm->ssl_ctx, data->ssl.conn) &&
|
|
data->phase2_success;
|
|
}
|
|
|
|
|
|
static void eap_ttls_deinit_for_reauth(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_ttls_data *data = priv;
|
|
os_free(data->pending_phase2_req);
|
|
data->pending_phase2_req = NULL;
|
|
}
|
|
|
|
|
|
static void * eap_ttls_init_for_reauth(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_ttls_data *data = priv;
|
|
os_free(data->key_data);
|
|
data->key_data = NULL;
|
|
if (eap_tls_reauth_init(sm, &data->ssl)) {
|
|
os_free(data);
|
|
return NULL;
|
|
}
|
|
if (data->phase2_priv && data->phase2_method &&
|
|
data->phase2_method->init_for_reauth)
|
|
data->phase2_method->init_for_reauth(sm, data->phase2_priv);
|
|
data->phase2_start = 0;
|
|
data->phase2_success = 0;
|
|
data->resuming = 1;
|
|
data->reauth = 1;
|
|
return priv;
|
|
}
|
|
|
|
|
|
static int eap_ttls_get_status(struct eap_sm *sm, void *priv, char *buf,
|
|
size_t buflen, int verbose)
|
|
{
|
|
struct eap_ttls_data *data = priv;
|
|
int len, ret;
|
|
|
|
len = eap_tls_status(sm, &data->ssl, buf, buflen, verbose);
|
|
ret = os_snprintf(buf + len, buflen - len,
|
|
"EAP-TTLSv%d Phase2 method=",
|
|
data->ttls_version);
|
|
if (ret < 0 || (size_t) ret >= buflen - len)
|
|
return len;
|
|
len += ret;
|
|
switch (data->phase2_type) {
|
|
case EAP_TTLS_PHASE2_EAP:
|
|
ret = os_snprintf(buf + len, buflen - len, "EAP-%s\n",
|
|
data->phase2_method ?
|
|
data->phase2_method->name : "?");
|
|
break;
|
|
case EAP_TTLS_PHASE2_MSCHAPV2:
|
|
ret = os_snprintf(buf + len, buflen - len, "MSCHAPV2\n");
|
|
break;
|
|
case EAP_TTLS_PHASE2_MSCHAP:
|
|
ret = os_snprintf(buf + len, buflen - len, "MSCHAP\n");
|
|
break;
|
|
case EAP_TTLS_PHASE2_PAP:
|
|
ret = os_snprintf(buf + len, buflen - len, "PAP\n");
|
|
break;
|
|
case EAP_TTLS_PHASE2_CHAP:
|
|
ret = os_snprintf(buf + len, buflen - len, "CHAP\n");
|
|
break;
|
|
default:
|
|
ret = 0;
|
|
break;
|
|
}
|
|
if (ret < 0 || (size_t) ret >= buflen - len)
|
|
return len;
|
|
len += ret;
|
|
|
|
return len;
|
|
}
|
|
|
|
|
|
static Boolean eap_ttls_isKeyAvailable(struct eap_sm *sm, void *priv)
|
|
{
|
|
struct eap_ttls_data *data = priv;
|
|
return data->key_data != NULL && data->phase2_success;
|
|
}
|
|
|
|
|
|
static u8 * eap_ttls_getKey(struct eap_sm *sm, void *priv, size_t *len)
|
|
{
|
|
struct eap_ttls_data *data = priv;
|
|
u8 *key;
|
|
|
|
if (data->key_data == NULL || !data->phase2_success)
|
|
return NULL;
|
|
|
|
key = os_malloc(EAP_TLS_KEY_LEN);
|
|
if (key == NULL)
|
|
return NULL;
|
|
|
|
*len = EAP_TLS_KEY_LEN;
|
|
os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
|
|
|
|
return key;
|
|
}
|
|
|
|
|
|
int eap_peer_ttls_register(void)
|
|
{
|
|
struct eap_method *eap;
|
|
int ret;
|
|
|
|
eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
|
|
EAP_VENDOR_IETF, EAP_TYPE_TTLS, "TTLS");
|
|
if (eap == NULL)
|
|
return -1;
|
|
|
|
eap->init = eap_ttls_init;
|
|
eap->deinit = eap_ttls_deinit;
|
|
eap->process = eap_ttls_process;
|
|
eap->isKeyAvailable = eap_ttls_isKeyAvailable;
|
|
eap->getKey = eap_ttls_getKey;
|
|
eap->get_status = eap_ttls_get_status;
|
|
eap->has_reauth_data = eap_ttls_has_reauth_data;
|
|
eap->deinit_for_reauth = eap_ttls_deinit_for_reauth;
|
|
eap->init_for_reauth = eap_ttls_init_for_reauth;
|
|
|
|
ret = eap_peer_method_register(eap);
|
|
if (ret)
|
|
eap_peer_method_free(eap);
|
|
return ret;
|
|
}
|