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WPS: Split wps_common.c into parts

Browse source 
To make it easier to find various functions, attribute functions were
split into wps_attr_{build,parse,process}.c.
This commit is contained in:
Jouni Malinen 2008-11-29 13:16:26 +02:00
parent 120bd30c34
commit 7d7b8e960a
7 changed files with 1008 additions and 937 deletions
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3
hostapd/Makefile
View file

@ -265,6 +265,9 @@ OBJS += wps_hostapd.o
OBJS += ../src/eap_server/eap_wsc.o ../src/eap_common/eap_wsc_common.o
OBJS += ../src/wps/wps.o
OBJS += ../src/wps/wps_common.o
OBJS += ../src/wps/wps_attr_parse.o
OBJS += ../src/wps/wps_attr_build.o
OBJS += ../src/wps/wps_attr_process.o
OBJS += ../src/wps/wps_dev_attr.o
OBJS += ../src/wps/wps_enrollee.o
OBJS += ../src/wps/wps_registrar.o

253
src/wps/wps_attr_build.c Normal file
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@ -0,0 +1,253 @@
/*
* Wi-Fi Protected Setup - attribute building
* Copyright (c) 2008, 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 "dh_groups.h"
#include "sha256.h"
#include "aes_wrap.h"
#include "wps_i.h"
int wps_build_public_key(struct wps_data *wps, struct wpabuf *msg)
{
struct wpabuf *pubkey;
wpa_printf(MSG_DEBUG, "WPS: * Public Key");
pubkey = dh_init(dh_groups_get(WPS_DH_GROUP), &wps->dh_privkey);
if (pubkey == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Failed to initialize "
"Diffie-Hellman handshake");
return -1;
}
wpabuf_put_be16(msg, ATTR_PUBLIC_KEY);
wpabuf_put_be16(msg, wpabuf_len(pubkey));
wpabuf_put_buf(msg, pubkey);
if (wps->registrar) {
wpabuf_free(wps->dh_pubkey_r);
wps->dh_pubkey_r = pubkey;
} else {
wpabuf_free(wps->dh_pubkey_e);
wps->dh_pubkey_e = pubkey;
}
return 0;
}
int wps_build_req_type(struct wpabuf *msg, enum wps_request_type type)
{
wpa_printf(MSG_DEBUG, "WPS: * Request Type");
wpabuf_put_be16(msg, ATTR_REQUEST_TYPE);
wpabuf_put_be16(msg, 1);
wpabuf_put_u8(msg, type);
return 0;
}
int wps_build_config_methods(struct wpabuf *msg, u16 methods)
{
wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, methods);
return 0;
}
int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid)
{
wpa_printf(MSG_DEBUG, "WPS: * UUID-E");
wpabuf_put_be16(msg, ATTR_UUID_E);
wpabuf_put_be16(msg, WPS_UUID_LEN);
wpabuf_put_data(msg, uuid, WPS_UUID_LEN);
return 0;
}
int wps_build_dev_password_id(struct wpabuf *msg, u16 id)
{
wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, id);
return 0;
}
int wps_build_config_error(struct wpabuf *msg, u16 err)
{
wpa_printf(MSG_DEBUG, "WPS: * Configuration Error (%d)", err);
wpabuf_put_be16(msg, ATTR_CONFIG_ERROR);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, err);
return 0;
}
int wps_build_authenticator(struct wps_data *wps, struct wpabuf *msg)
{
u8 hash[SHA256_MAC_LEN];
const u8 *addr[2];
size_t len[2];
if (wps->last_msg == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Last message not available for "
"building authenticator");
return -1;
}
/* Authenticator = HMAC-SHA256_AuthKey(M_prev || M_curr*)
* (M_curr* is M_curr without the Authenticator attribute)
*/
addr[0] = wpabuf_head(wps->last_msg);
len[0] = wpabuf_len(wps->last_msg);
addr[1] = wpabuf_head(msg);
len[1] = wpabuf_len(msg);
hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 2, addr, len, hash);
wpa_printf(MSG_DEBUG, "WPS: * Authenticator");
wpabuf_put_be16(msg, ATTR_AUTHENTICATOR);
wpabuf_put_be16(msg, WPS_AUTHENTICATOR_LEN);
wpabuf_put_data(msg, hash, WPS_AUTHENTICATOR_LEN);
return 0;
}
int wps_build_version(struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Version");
wpabuf_put_be16(msg, ATTR_VERSION);
wpabuf_put_be16(msg, 1);
wpabuf_put_u8(msg, WPS_VERSION);
return 0;
}
int wps_build_msg_type(struct wpabuf *msg, enum wps_msg_type msg_type)
{
wpa_printf(MSG_DEBUG, "WPS: * Message Type (%d)", msg_type);
wpabuf_put_be16(msg, ATTR_MSG_TYPE);
wpabuf_put_be16(msg, 1);
wpabuf_put_u8(msg, msg_type);
return 0;
}
int wps_build_enrollee_nonce(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Enrollee Nonce");
wpabuf_put_be16(msg, ATTR_ENROLLEE_NONCE);
wpabuf_put_be16(msg, WPS_NONCE_LEN);
wpabuf_put_data(msg, wps->nonce_e, WPS_NONCE_LEN);
return 0;
}
int wps_build_registrar_nonce(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Registrar Nonce");
wpabuf_put_be16(msg, ATTR_REGISTRAR_NONCE);
wpabuf_put_be16(msg, WPS_NONCE_LEN);
wpabuf_put_data(msg, wps->nonce_r, WPS_NONCE_LEN);
return 0;
}
int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Authentication Type Flags");
wpabuf_put_be16(msg, ATTR_AUTH_TYPE_FLAGS);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, WPS_AUTH_TYPES);
return 0;
}
int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Encryption Type Flags");
wpabuf_put_be16(msg, ATTR_ENCR_TYPE_FLAGS);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, WPS_ENCR_TYPES);
return 0;
}
int wps_build_conn_type_flags(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Connection Type Flags");
wpabuf_put_be16(msg, ATTR_CONN_TYPE_FLAGS);
wpabuf_put_be16(msg, 1);
wpabuf_put_u8(msg, WPS_CONN_ESS);
return 0;
}
int wps_build_assoc_state(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Association State");
wpabuf_put_be16(msg, ATTR_ASSOC_STATE);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, WPS_ASSOC_NOT_ASSOC);
return 0;
}
int wps_build_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg)
{
u8 hash[SHA256_MAC_LEN];
wpa_printf(MSG_DEBUG, "WPS: * Key Wrap Authenticator");
hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, wpabuf_head(msg),
wpabuf_len(msg), hash);
wpabuf_put_be16(msg, ATTR_KEY_WRAP_AUTH);
wpabuf_put_be16(msg, WPS_KWA_LEN);
wpabuf_put_data(msg, hash, WPS_KWA_LEN);
return 0;
}
int wps_build_encr_settings(struct wps_data *wps, struct wpabuf *msg,
struct wpabuf *plain)
{
size_t pad_len;
const size_t block_size = 16;
u8 *iv, *data;
wpa_printf(MSG_DEBUG, "WPS: * Encrypted Settings");
/* PKCS#5 v2.0 pad */
pad_len = block_size - wpabuf_len(plain) % block_size;
os_memset(wpabuf_put(plain, pad_len), pad_len, pad_len);
wpabuf_put_be16(msg, ATTR_ENCR_SETTINGS);
wpabuf_put_be16(msg, block_size + wpabuf_len(plain));
iv = wpabuf_put(msg, block_size);
if (os_get_random(iv, block_size) < 0)
return -1;
data = wpabuf_put(msg, 0);
wpabuf_put_buf(msg, plain);
if (aes_128_cbc_encrypt(wps->keywrapkey, iv, data, wpabuf_len(plain)))
return -1;
return 0;
}

429
src/wps/wps_attr_parse.c Normal file
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@ -0,0 +1,429 @@
/*
* Wi-Fi Protected Setup - attribute parsing
* Copyright (c) 2008, 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 "wps_i.h"
static int wps_set_attr(struct wps_parse_attr *attr, u16 type,
const u8 *pos, u16 len)
{
switch (type) {
case ATTR_VERSION:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Version length %u",
len);
return -1;
}
attr->version = pos;
break;
case ATTR_MSG_TYPE:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type "
"length %u", len);
return -1;
}
attr->msg_type = pos;
break;
case ATTR_ENROLLEE_NONCE:
if (len != WPS_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Enrollee Nonce "
"length %u", len);
return -1;
}
attr->enrollee_nonce = pos;
break;
case ATTR_REGISTRAR_NONCE:
if (len != WPS_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce "
"length %u", len);
return -1;
}
attr->registrar_nonce = pos;
break;
case ATTR_UUID_E:
if (len != WPS_UUID_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid UUID-E length %u",
len);
return -1;
}
attr->uuid_e = pos;
break;
case ATTR_UUID_R:
if (len != WPS_UUID_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid UUID-R length %u",
len);
return -1;
}
attr->uuid_r = pos;
break;
case ATTR_AUTH_TYPE_FLAGS:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Authentication "
"Type Flags length %u", len);
return -1;
}
attr->auth_type_flags = pos;
break;
case ATTR_ENCR_TYPE_FLAGS:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Encryption Type "
"Flags length %u", len);
return -1;
}
attr->encr_type_flags = pos;
break;
case ATTR_CONN_TYPE_FLAGS:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Connection Type "
"Flags length %u", len);
return -1;
}
attr->conn_type_flags = pos;
break;
case ATTR_CONFIG_METHODS:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Config Methods "
"length %u", len);
return -1;
}
attr->config_methods = pos;
break;
case ATTR_SELECTED_REGISTRAR_CONFIG_METHODS:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Selected "
"Registrar Config Methods length %u", len);
return -1;
}
attr->sel_reg_config_methods = pos;
break;
case ATTR_PRIMARY_DEV_TYPE:
if (len != sizeof(struct wps_dev_type)) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Primary Device "
"Type length %u", len);
return -1;
}
attr->primary_dev_type = pos;
break;
case ATTR_RF_BANDS:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid RF Bands length "
"%u", len);
return -1;
}
attr->rf_bands = pos;
break;
case ATTR_ASSOC_STATE:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Association State "
"length %u", len);
return -1;
}
attr->assoc_state = pos;
break;
case ATTR_CONFIG_ERROR:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Configuration "
"Error length %u", len);
return -1;
}
attr->config_error = pos;
break;
case ATTR_DEV_PASSWORD_ID:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Device Password "
"ID length %u", len);
return -1;
}
attr->dev_password_id = pos;
break;
case ATTR_OS_VERSION:
if (len != 4) {
wpa_printf(MSG_DEBUG, "WPS: Invalid OS Version length "
"%u", len);
return -1;
}
attr->os_version = pos;
break;
case ATTR_WPS_STATE:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Wi-Fi Protected "
"Setup State length %u", len);
return -1;
}
attr->wps_state = pos;
break;
case ATTR_AUTHENTICATOR:
if (len != WPS_AUTHENTICATOR_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Authenticator "
"length %u", len);
return -1;
}
attr->authenticator = pos;
break;
case ATTR_R_HASH1:
if (len != WPS_HASH_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid R-Hash1 length %u",
len);
return -1;
}
attr->r_hash1 = pos;
break;
case ATTR_R_HASH2:
if (len != WPS_HASH_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid R-Hash2 length %u",
len);
return -1;
}
attr->r_hash2 = pos;
break;
case ATTR_E_HASH1:
if (len != WPS_HASH_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid E-Hash1 length %u",
len);
return -1;
}
attr->e_hash1 = pos;
break;
case ATTR_E_HASH2:
if (len != WPS_HASH_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid E-Hash2 length %u",
len);
return -1;
}
attr->e_hash2 = pos;
break;
case ATTR_R_SNONCE1:
if (len != WPS_SECRET_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid R-SNonce1 length "
"%u", len);
return -1;
}
attr->r_snonce1 = pos;
break;
case ATTR_R_SNONCE2:
if (len != WPS_SECRET_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid R-SNonce2 length "
"%u", len);
return -1;
}
attr->r_snonce2 = pos;
break;
case ATTR_E_SNONCE1:
if (len != WPS_SECRET_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid E-SNonce1 length "
"%u", len);
return -1;
}
attr->e_snonce1 = pos;
break;
case ATTR_E_SNONCE2:
if (len != WPS_SECRET_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid E-SNonce2 length "
"%u", len);
return -1;
}
attr->e_snonce2 = pos;
break;
case ATTR_KEY_WRAP_AUTH:
if (len != WPS_KWA_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Key Wrap "
"Authenticator length %u", len);
return -1;
}
attr->key_wrap_auth = pos;
break;
case ATTR_AUTH_TYPE:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Authentication "
"Type length %u", len);
return -1;
}
attr->auth_type = pos;
break;
case ATTR_ENCR_TYPE:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Encryption "
"Type length %u", len);
return -1;
}
attr->encr_type = pos;
break;
case ATTR_NETWORK_INDEX:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Network Index "
"length %u", len);
return -1;
}
attr->network_idx = pos;
break;
case ATTR_NETWORK_KEY_INDEX:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Network Key Index "
"length %u", len);
return -1;
}
attr->network_key_idx = pos;
break;
case ATTR_MAC_ADDR:
if (len != ETH_ALEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid MAC Address "
"length %u", len);
return -1;
}
attr->mac_addr = pos;
break;
case ATTR_KEY_PROVIDED_AUTO:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Key Provided "
"Automatically length %u", len);
return -1;
}
attr->key_prov_auto = pos;
break;
case ATTR_802_1X_ENABLED:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid 802.1X Enabled "
"length %u", len);
return -1;
}
attr->dot1x_enabled = pos;
break;
case ATTR_SELECTED_REGISTRAR:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Selected Registrar"
" length %u", len);
return -1;
}
attr->selected_registrar = pos;
break;
case ATTR_REQUEST_TYPE:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Request Type "
"length %u", len);
return -1;
}
attr->request_type = pos;
break;
case ATTR_RESPONSE_TYPE:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Response Type "
"length %u", len);
return -1;
}
attr->request_type = pos;
break;
case ATTR_MANUFACTURER:
attr->manufacturer = pos;
attr->manufacturer_len = len;
break;
case ATTR_MODEL_NAME:
attr->model_name = pos;
attr->model_name_len = len;
break;
case ATTR_MODEL_NUMBER:
attr->model_number = pos;
attr->model_number_len = len;
break;
case ATTR_SERIAL_NUMBER:
attr->serial_number = pos;
attr->serial_number_len = len;
break;
case ATTR_DEV_NAME:
attr->dev_name = pos;
attr->dev_name_len = len;
break;
case ATTR_PUBLIC_KEY:
attr->public_key = pos;
attr->public_key_len = len;
break;
case ATTR_ENCR_SETTINGS:
attr->encr_settings = pos;
attr->encr_settings_len = len;
break;
case ATTR_CRED:
if (attr->num_cred >= MAX_CRED_COUNT) {
wpa_printf(MSG_DEBUG, "WPS: Skipped Credential "
"attribute (max %d credentials)",
MAX_CRED_COUNT);
break;
}
attr->cred[attr->num_cred] = pos;
attr->cred_len[attr->num_cred] = len;
attr->num_cred++;
break;
case ATTR_SSID:
attr->ssid = pos;
attr->ssid_len = len;
break;
case ATTR_NETWORK_KEY:
attr->network_key = pos;
attr->network_key_len = len;
break;
case ATTR_EAP_TYPE:
attr->eap_type = pos;
attr->eap_type_len = len;
break;
case ATTR_EAP_IDENTITY:
attr->eap_identity = pos;
attr->eap_identity_len = len;
break;
default:
wpa_printf(MSG_DEBUG, "WPS: Unsupported attribute type 0x%x "
"len=%u", type, len);
break;
}
return 0;
}
int wps_parse_msg(const struct wpabuf *msg, struct wps_parse_attr *attr)
{
const u8 *pos, *end;
u16 type, len;
os_memset(attr, 0, sizeof(*attr));
pos = wpabuf_head(msg);
end = pos + wpabuf_len(msg);
while (pos < end) {
if (end - pos < 4) {
wpa_printf(MSG_DEBUG, "WPS: Invalid message - "
"%lu bytes remaining",
(unsigned long) (end - pos));
return -1;
}
type = WPA_GET_BE16(pos);
pos += 2;
len = WPA_GET_BE16(pos);
pos += 2;
wpa_printf(MSG_MSGDUMP, "WPS: attr type=0x%x len=%u",
type, len);
if (len > end - pos) {
wpa_printf(MSG_DEBUG, "WPS: Attribute overflow");
return -1;
}
if (wps_set_attr(attr, type, pos, len) < 0)
return -1;
pos += len;
}
return 0;
}

302
src/wps/wps_attr_process.c Normal file
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@ -0,0 +1,302 @@
/*
* Wi-Fi Protected Setup - attribute processing
* Copyright (c) 2008, 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 "sha256.h"
#include "wps_i.h"
int wps_process_authenticator(struct wps_data *wps, const u8 *authenticator,
const struct wpabuf *msg)
{
u8 hash[SHA256_MAC_LEN];
const u8 *addr[2];
size_t len[2];
if (authenticator == NULL) {
wpa_printf(MSG_DEBUG, "WPS: No Authenticator attribute "
"included");
return -1;
}
if (wps->last_msg == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Last message not available for "
"validating authenticator");
return -1;
}
/* Authenticator = HMAC-SHA256_AuthKey(M_prev || M_curr*)
* (M_curr* is M_curr without the Authenticator attribute)
*/
addr[0] = wpabuf_head(wps->last_msg);
len[0] = wpabuf_len(wps->last_msg);
addr[1] = wpabuf_head(msg);
len[1] = wpabuf_len(msg) - 4 - WPS_AUTHENTICATOR_LEN;
hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 2, addr, len, hash);
if (os_memcmp(hash, authenticator, WPS_AUTHENTICATOR_LEN) != 0) {
wpa_printf(MSG_DEBUG, "WPS: Incorrect Authenticator");
return -1;
}
return 0;
}
int wps_process_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg,
const u8 *key_wrap_auth)
{
u8 hash[SHA256_MAC_LEN];
const u8 *head;
size_t len;
if (key_wrap_auth == NULL) {
wpa_printf(MSG_DEBUG, "WPS: No KWA in decrypted attribute");
return -1;
}
head = wpabuf_head(msg);
len = wpabuf_len(msg) - 4 - WPS_KWA_LEN;
if (head + len != key_wrap_auth - 4) {
wpa_printf(MSG_DEBUG, "WPS: KWA not in the end of the "
"decrypted attribute");
return -1;
}
hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, head, len, hash);
if (os_memcmp(hash, key_wrap_auth, WPS_KWA_LEN) != 0) {
wpa_printf(MSG_DEBUG, "WPS: Invalid KWA");
return -1;
}
return 0;
}
static int wps_process_cred_network_idx(struct wps_credential *cred,
const u8 *idx)
{
if (idx == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"Network Index");
return -1;
}
wpa_printf(MSG_DEBUG, "WPS: Network Index: %d", *idx);
return 0;
}
static int wps_process_cred_ssid(struct wps_credential *cred, const u8 *ssid,
size_t ssid_len)
{
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include SSID");
return -1;
}
/* Remove zero-padding since some Registrar implementations seem to use
* hardcoded 32-octet length for this attribute */
while (ssid_len > 0 && ssid[ssid_len - 1] == 0)
ssid_len--;
wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", ssid, ssid_len);
if (ssid_len <= sizeof(cred->ssid)) {
os_memcpy(cred->ssid, ssid, ssid_len);
cred->ssid_len = ssid_len;
}
return 0;
}
static int wps_process_cred_auth_type(struct wps_credential *cred,
const u8 *auth_type)
{
if (auth_type == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"Authentication Type");
return -1;
}
cred->auth_type = WPA_GET_BE16(auth_type);
wpa_printf(MSG_DEBUG, "WPS: Authentication Type: 0x%x",
cred->auth_type);
return 0;
}
static int wps_process_cred_encr_type(struct wps_credential *cred,
const u8 *encr_type)
{
if (encr_type == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"Encryption Type");
return -1;
}
cred->encr_type = WPA_GET_BE16(encr_type);
wpa_printf(MSG_DEBUG, "WPS: Encryption Type: 0x%x",
cred->encr_type);
return 0;
}
static int wps_process_cred_network_key_idx(struct wps_credential *cred,
const u8 *key_idx)
{
if (key_idx == NULL)
return 0; /* optional attribute */
wpa_printf(MSG_DEBUG, "WPS: Network Key Index: %d", *key_idx);
cred->key_idx = *key_idx;
return 0;
}
static int wps_process_cred_network_key(struct wps_credential *cred,
const u8 *key, size_t key_len)
{
if (key == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"Network Key");
return -1;
}
wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", key, key_len);
if (key_len <= sizeof(cred->key)) {
os_memcpy(cred->key, key, key_len);
cred->key_len = key_len;
}
return 0;
}
static int wps_process_cred_mac_addr(struct wps_credential *cred,
const u8 *mac_addr)
{
if (mac_addr == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"MAC Address");
return -1;
}
wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR, MAC2STR(mac_addr));
os_memcpy(cred->mac_addr, mac_addr, ETH_ALEN);
return 0;
}
static int wps_process_cred_eap_type(struct wps_credential *cred,
const u8 *eap_type, size_t eap_type_len)
{
if (eap_type == NULL)
return 0; /* optional attribute */
wpa_hexdump(MSG_DEBUG, "WPS: EAP Type", eap_type, eap_type_len);
return 0;
}
static int wps_process_cred_eap_identity(struct wps_credential *cred,
const u8 *identity,
size_t identity_len)
{
if (identity == NULL)
return 0; /* optional attribute */
wpa_hexdump_ascii(MSG_DEBUG, "WPS: EAP Identity",
identity, identity_len);
return 0;
}
static int wps_process_cred_key_prov_auto(struct wps_credential *cred,
const u8 *key_prov_auto)
{
if (key_prov_auto == NULL)
return 0; /* optional attribute */
wpa_printf(MSG_DEBUG, "WPS: Key Provided Automatically: %d",
*key_prov_auto);
return 0;
}
static int wps_process_cred_802_1x_enabled(struct wps_credential *cred,
const u8 *dot1x_enabled)
{
if (dot1x_enabled == NULL)
return 0; /* optional attribute */
wpa_printf(MSG_DEBUG, "WPS: 802.1X Enabled: %d", *dot1x_enabled);
return 0;
}
int wps_process_cred(struct wps_parse_attr *attr,
struct wps_credential *cred)
{
wpa_printf(MSG_DEBUG, "WPS: Process Credential");
/* TODO: support multiple Network Keys */
if (wps_process_cred_network_idx(cred, attr->network_idx) ||
wps_process_cred_ssid(cred, attr->ssid, attr->ssid_len) ||
wps_process_cred_auth_type(cred, attr->auth_type) ||
wps_process_cred_encr_type(cred, attr->encr_type) ||
wps_process_cred_network_key_idx(cred, attr->network_key_idx) ||
wps_process_cred_network_key(cred, attr->network_key,
attr->network_key_len) ||
wps_process_cred_mac_addr(cred, attr->mac_addr) ||
wps_process_cred_eap_type(cred, attr->eap_type,
attr->eap_type_len) ||
wps_process_cred_eap_identity(cred, attr->eap_identity,
attr->eap_identity_len) ||
wps_process_cred_key_prov_auto(cred, attr->key_prov_auto) ||
wps_process_cred_802_1x_enabled(cred, attr->dot1x_enabled))
return -1;
return 0;
}
int wps_process_ap_settings(struct wps_parse_attr *attr,
struct wps_credential *cred)
{
wpa_printf(MSG_DEBUG, "WPS: Processing AP Settings");
os_memset(cred, 0, sizeof(*cred));
/* TODO: optional attributes New Password and Device Password ID */
if (wps_process_cred_ssid(cred, attr->ssid, attr->ssid_len) ||
wps_process_cred_auth_type(cred, attr->auth_type) ||
wps_process_cred_encr_type(cred, attr->encr_type) ||
wps_process_cred_network_key_idx(cred, attr->network_key_idx) ||
wps_process_cred_network_key(cred, attr->network_key,
attr->network_key_len) ||
wps_process_cred_mac_addr(cred, attr->mac_addr))
return -1;
return 0;
}

926
src/wps/wps_common.c
View file

@ -24,417 +24,6 @@
#include "wps_dev_attr.h"
static int wps_set_attr(struct wps_parse_attr *attr, u16 type,
const u8 *pos, u16 len)
{
switch (type) {
case ATTR_VERSION:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Version length %u",
len);
return -1;
}
attr->version = pos;
break;
case ATTR_MSG_TYPE:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Message Type "
"length %u", len);
return -1;
}
attr->msg_type = pos;
break;
case ATTR_ENROLLEE_NONCE:
if (len != WPS_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Enrollee Nonce "
"length %u", len);
return -1;
}
attr->enrollee_nonce = pos;
break;
case ATTR_REGISTRAR_NONCE:
if (len != WPS_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Registrar Nonce "
"length %u", len);
return -1;
}
attr->registrar_nonce = pos;
break;
case ATTR_UUID_E:
if (len != WPS_UUID_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid UUID-E length %u",
len);
return -1;
}
attr->uuid_e = pos;
break;
case ATTR_UUID_R:
if (len != WPS_UUID_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid UUID-R length %u",
len);
return -1;
}
attr->uuid_r = pos;
break;
case ATTR_AUTH_TYPE_FLAGS:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Authentication "
"Type Flags length %u", len);
return -1;
}
attr->auth_type_flags = pos;
break;
case ATTR_ENCR_TYPE_FLAGS:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Encryption Type "
"Flags length %u", len);
return -1;
}
attr->encr_type_flags = pos;
break;
case ATTR_CONN_TYPE_FLAGS:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Connection Type "
"Flags length %u", len);
return -1;
}
attr->conn_type_flags = pos;
break;
case ATTR_CONFIG_METHODS:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Config Methods "
"length %u", len);
return -1;
}
attr->config_methods = pos;
break;
case ATTR_SELECTED_REGISTRAR_CONFIG_METHODS:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Selected "
"Registrar Config Methods length %u", len);
return -1;
}
attr->sel_reg_config_methods = pos;
break;
case ATTR_PRIMARY_DEV_TYPE:
if (len != sizeof(struct wps_dev_type)) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Primary Device "
"Type length %u", len);
return -1;
}
attr->primary_dev_type = pos;
break;
case ATTR_RF_BANDS:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid RF Bands length "
"%u", len);
return -1;
}
attr->rf_bands = pos;
break;
case ATTR_ASSOC_STATE:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Association State "
"length %u", len);
return -1;
}
attr->assoc_state = pos;
break;
case ATTR_CONFIG_ERROR:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Configuration "
"Error length %u", len);
return -1;
}
attr->config_error = pos;
break;
case ATTR_DEV_PASSWORD_ID:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Device Password "
"ID length %u", len);
return -1;
}
attr->dev_password_id = pos;
break;
case ATTR_OS_VERSION:
if (len != 4) {
wpa_printf(MSG_DEBUG, "WPS: Invalid OS Version length "
"%u", len);
return -1;
}
attr->os_version = pos;
break;
case ATTR_WPS_STATE:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Wi-Fi Protected "
"Setup State length %u", len);
return -1;
}
attr->wps_state = pos;
break;
case ATTR_AUTHENTICATOR:
if (len != WPS_AUTHENTICATOR_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Authenticator "
"length %u", len);
return -1;
}
attr->authenticator = pos;
break;
case ATTR_R_HASH1:
if (len != WPS_HASH_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid R-Hash1 length %u",
len);
return -1;
}
attr->r_hash1 = pos;
break;
case ATTR_R_HASH2:
if (len != WPS_HASH_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid R-Hash2 length %u",
len);
return -1;
}
attr->r_hash2 = pos;
break;
case ATTR_E_HASH1:
if (len != WPS_HASH_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid E-Hash1 length %u",
len);
return -1;
}
attr->e_hash1 = pos;
break;
case ATTR_E_HASH2:
if (len != WPS_HASH_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid E-Hash2 length %u",
len);
return -1;
}
attr->e_hash2 = pos;
break;
case ATTR_R_SNONCE1:
if (len != WPS_SECRET_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid R-SNonce1 length "
"%u", len);
return -1;
}
attr->r_snonce1 = pos;
break;
case ATTR_R_SNONCE2:
if (len != WPS_SECRET_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid R-SNonce2 length "
"%u", len);
return -1;
}
attr->r_snonce2 = pos;
break;
case ATTR_E_SNONCE1:
if (len != WPS_SECRET_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid E-SNonce1 length "
"%u", len);
return -1;
}
attr->e_snonce1 = pos;
break;
case ATTR_E_SNONCE2:
if (len != WPS_SECRET_NONCE_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid E-SNonce2 length "
"%u", len);
return -1;
}
attr->e_snonce2 = pos;
break;
case ATTR_KEY_WRAP_AUTH:
if (len != WPS_KWA_LEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Key Wrap "
"Authenticator length %u", len);
return -1;
}
attr->key_wrap_auth = pos;
break;
case ATTR_AUTH_TYPE:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Authentication "
"Type length %u", len);
return -1;
}
attr->auth_type = pos;
break;
case ATTR_ENCR_TYPE:
if (len != 2) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Encryption "
"Type length %u", len);
return -1;
}
attr->encr_type = pos;
break;
case ATTR_NETWORK_INDEX:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Network Index "
"length %u", len);
return -1;
}
attr->network_idx = pos;
break;
case ATTR_NETWORK_KEY_INDEX:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Network Key Index "
"length %u", len);
return -1;
}
attr->network_key_idx = pos;
break;
case ATTR_MAC_ADDR:
if (len != ETH_ALEN) {
wpa_printf(MSG_DEBUG, "WPS: Invalid MAC Address "
"length %u", len);
return -1;
}
attr->mac_addr = pos;
break;
case ATTR_KEY_PROVIDED_AUTO:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Key Provided "
"Automatically length %u", len);
return -1;
}
attr->key_prov_auto = pos;
break;
case ATTR_802_1X_ENABLED:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid 802.1X Enabled "
"length %u", len);
return -1;
}
attr->dot1x_enabled = pos;
break;
case ATTR_SELECTED_REGISTRAR:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Selected Registrar"
" length %u", len);
return -1;
}
attr->selected_registrar = pos;
break;
case ATTR_REQUEST_TYPE:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Request Type "
"length %u", len);
return -1;
}
attr->request_type = pos;
break;
case ATTR_RESPONSE_TYPE:
if (len != 1) {
wpa_printf(MSG_DEBUG, "WPS: Invalid Response Type "
"length %u", len);
return -1;
}
attr->request_type = pos;
break;
case ATTR_MANUFACTURER:
attr->manufacturer = pos;
attr->manufacturer_len = len;
break;
case ATTR_MODEL_NAME:
attr->model_name = pos;
attr->model_name_len = len;
break;
case ATTR_MODEL_NUMBER:
attr->model_number = pos;
attr->model_number_len = len;
break;
case ATTR_SERIAL_NUMBER:
attr->serial_number = pos;
attr->serial_number_len = len;
break;
case ATTR_DEV_NAME:
attr->dev_name = pos;
attr->dev_name_len = len;
break;
case ATTR_PUBLIC_KEY:
attr->public_key = pos;
attr->public_key_len = len;
break;
case ATTR_ENCR_SETTINGS:
attr->encr_settings = pos;
attr->encr_settings_len = len;
break;
case ATTR_CRED:
if (attr->num_cred >= MAX_CRED_COUNT) {
wpa_printf(MSG_DEBUG, "WPS: Skipped Credential "
"attribute (max %d credentials)",
MAX_CRED_COUNT);
break;
}
attr->cred[attr->num_cred] = pos;
attr->cred_len[attr->num_cred] = len;
attr->num_cred++;
break;
case ATTR_SSID:
attr->ssid = pos;
attr->ssid_len = len;
break;
case ATTR_NETWORK_KEY:
attr->network_key = pos;
attr->network_key_len = len;
break;
case ATTR_EAP_TYPE:
attr->eap_type = pos;
attr->eap_type_len = len;
break;
case ATTR_EAP_IDENTITY:
attr->eap_identity = pos;
attr->eap_identity_len = len;
break;
default:
wpa_printf(MSG_DEBUG, "WPS: Unsupported attribute type 0x%x "
"len=%u", type, len);
break;
}
return 0;
}
int wps_parse_msg(const struct wpabuf *msg, struct wps_parse_attr *attr)
{
const u8 *pos, *end;
u16 type, len;
os_memset(attr, 0, sizeof(*attr));
pos = wpabuf_head(msg);
end = pos + wpabuf_len(msg);
while (pos < end) {
if (end - pos < 4) {
wpa_printf(MSG_DEBUG, "WPS: Invalid message - "
"%lu bytes remaining",
(unsigned long) (end - pos));
return -1;
}
type = WPA_GET_BE16(pos);
pos += 2;
len = WPA_GET_BE16(pos);
pos += 2;
wpa_printf(MSG_MSGDUMP, "WPS: attr type=0x%x len=%u",
type, len);
if (len > end - pos) {
wpa_printf(MSG_DEBUG, "WPS: Attribute overflow");
return -1;
}
if (wps_set_attr(attr, type, pos, len) < 0)
return -1;
pos += len;
}
return 0;
}
void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
const char *label, u8 *res, size_t res_len)
{
@ -473,84 +62,6 @@ void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
}
int wps_build_public_key(struct wps_data *wps, struct wpabuf *msg)
{
struct wpabuf *pubkey;
wpa_printf(MSG_DEBUG, "WPS: * Public Key");
pubkey = dh_init(dh_groups_get(WPS_DH_GROUP), &wps->dh_privkey);
if (pubkey == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Failed to initialize "
"Diffie-Hellman handshake");
return -1;
}
wpabuf_put_be16(msg, ATTR_PUBLIC_KEY);
wpabuf_put_be16(msg, wpabuf_len(pubkey));
wpabuf_put_buf(msg, pubkey);
if (wps->registrar) {
wpabuf_free(wps->dh_pubkey_r);
wps->dh_pubkey_r = pubkey;
} else {
wpabuf_free(wps->dh_pubkey_e);
wps->dh_pubkey_e = pubkey;
}
return 0;
}
static int wps_build_req_type(struct wpabuf *msg, enum wps_request_type type)
{
wpa_printf(MSG_DEBUG, "WPS: * Request Type");
wpabuf_put_be16(msg, ATTR_REQUEST_TYPE);
wpabuf_put_be16(msg, 1);
wpabuf_put_u8(msg, type);
return 0;
}
int wps_build_config_methods(struct wpabuf *msg, u16 methods)
{
wpa_printf(MSG_DEBUG, "WPS: * Config Methods (%x)", methods);
wpabuf_put_be16(msg, ATTR_CONFIG_METHODS);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, methods);
return 0;
}
int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid)
{
wpa_printf(MSG_DEBUG, "WPS: * UUID-E");
wpabuf_put_be16(msg, ATTR_UUID_E);
wpabuf_put_be16(msg, WPS_UUID_LEN);
wpabuf_put_data(msg, uuid, WPS_UUID_LEN);
return 0;
}
int wps_build_dev_password_id(struct wpabuf *msg, u16 id)
{
wpa_printf(MSG_DEBUG, "WPS: * Device Password ID (%d)", id);
wpabuf_put_be16(msg, ATTR_DEV_PASSWORD_ID);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, id);
return 0;
}
int wps_build_config_error(struct wpabuf *msg, u16 err)
{
wpa_printf(MSG_DEBUG, "WPS: * Configuration Error (%d)", err);
wpabuf_put_be16(msg, ATTR_CONFIG_ERROR);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, err);
return 0;
}
struct wpabuf * wps_build_assoc_req_ie(void)
{
struct wpabuf *ie;
@ -737,73 +248,6 @@ int wps_derive_mgmt_keys(struct wps_data *wps)
}
int wps_build_authenticator(struct wps_data *wps, struct wpabuf *msg)
{
u8 hash[SHA256_MAC_LEN];
const u8 *addr[2];
size_t len[2];
if (wps->last_msg == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Last message not available for "
"building authenticator");
return -1;
}
/* Authenticator = HMAC-SHA256_AuthKey(M_prev || M_curr*)
* (M_curr* is M_curr without the Authenticator attribute)
*/
addr[0] = wpabuf_head(wps->last_msg);
len[0] = wpabuf_len(wps->last_msg);
addr[1] = wpabuf_head(msg);
len[1] = wpabuf_len(msg);
hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 2, addr, len, hash);
wpa_printf(MSG_DEBUG, "WPS: * Authenticator");
wpabuf_put_be16(msg, ATTR_AUTHENTICATOR);
wpabuf_put_be16(msg, WPS_AUTHENTICATOR_LEN);
wpabuf_put_data(msg, hash, WPS_AUTHENTICATOR_LEN);
return 0;
}
int wps_process_authenticator(struct wps_data *wps, const u8 *authenticator,
const struct wpabuf *msg)
{
u8 hash[SHA256_MAC_LEN];
const u8 *addr[2];
size_t len[2];
if (authenticator == NULL) {
wpa_printf(MSG_DEBUG, "WPS: No Authenticator attribute "
"included");
return -1;
}
if (wps->last_msg == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Last message not available for "
"validating authenticator");
return -1;
}
/* Authenticator = HMAC-SHA256_AuthKey(M_prev || M_curr*)
* (M_curr* is M_curr without the Authenticator attribute)
*/
addr[0] = wpabuf_head(wps->last_msg);
len[0] = wpabuf_len(wps->last_msg);
addr[1] = wpabuf_head(msg);
len[1] = wpabuf_len(msg) - 4 - WPS_AUTHENTICATOR_LEN;
hmac_sha256_vector(wps->authkey, WPS_AUTHKEY_LEN, 2, addr, len, hash);
if (os_memcmp(hash, authenticator, WPS_AUTHENTICATOR_LEN) != 0) {
wpa_printf(MSG_DEBUG, "WPS: Incorrect Authenticator");
return -1;
}
return 0;
}
void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
size_t dev_passwd_len)
{
@ -874,373 +318,3 @@ struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
return decrypted;
}
int wps_process_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg,
const u8 *key_wrap_auth)
{
u8 hash[SHA256_MAC_LEN];
const u8 *head;
size_t len;
if (key_wrap_auth == NULL) {
wpa_printf(MSG_DEBUG, "WPS: No KWA in decrypted attribute");
return -1;
}
head = wpabuf_head(msg);
len = wpabuf_len(msg) - 4 - WPS_KWA_LEN;
if (head + len != key_wrap_auth - 4) {
wpa_printf(MSG_DEBUG, "WPS: KWA not in the end of the "
"decrypted attribute");
return -1;
}
hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, head, len, hash);
if (os_memcmp(hash, key_wrap_auth, WPS_KWA_LEN) != 0) {
wpa_printf(MSG_DEBUG, "WPS: Invalid KWA");
return -1;
}
return 0;
}
int wps_build_version(struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Version");
wpabuf_put_be16(msg, ATTR_VERSION);
wpabuf_put_be16(msg, 1);
wpabuf_put_u8(msg, WPS_VERSION);
return 0;
}
int wps_build_msg_type(struct wpabuf *msg, enum wps_msg_type msg_type)
{
wpa_printf(MSG_DEBUG, "WPS: * Message Type (%d)", msg_type);
wpabuf_put_be16(msg, ATTR_MSG_TYPE);
wpabuf_put_be16(msg, 1);
wpabuf_put_u8(msg, msg_type);
return 0;
}
int wps_build_enrollee_nonce(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Enrollee Nonce");
wpabuf_put_be16(msg, ATTR_ENROLLEE_NONCE);
wpabuf_put_be16(msg, WPS_NONCE_LEN);
wpabuf_put_data(msg, wps->nonce_e, WPS_NONCE_LEN);
return 0;
}
int wps_build_registrar_nonce(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Registrar Nonce");
wpabuf_put_be16(msg, ATTR_REGISTRAR_NONCE);
wpabuf_put_be16(msg, WPS_NONCE_LEN);
wpabuf_put_data(msg, wps->nonce_r, WPS_NONCE_LEN);
return 0;
}
int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Authentication Type Flags");
wpabuf_put_be16(msg, ATTR_AUTH_TYPE_FLAGS);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, WPS_AUTH_TYPES);
return 0;
}
int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Encryption Type Flags");
wpabuf_put_be16(msg, ATTR_ENCR_TYPE_FLAGS);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, WPS_ENCR_TYPES);
return 0;
}
int wps_build_conn_type_flags(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Connection Type Flags");
wpabuf_put_be16(msg, ATTR_CONN_TYPE_FLAGS);
wpabuf_put_be16(msg, 1);
wpabuf_put_u8(msg, WPS_CONN_ESS);
return 0;
}
int wps_build_assoc_state(struct wps_data *wps, struct wpabuf *msg)
{
wpa_printf(MSG_DEBUG, "WPS: * Association State");
wpabuf_put_be16(msg, ATTR_ASSOC_STATE);
wpabuf_put_be16(msg, 2);
wpabuf_put_be16(msg, WPS_ASSOC_NOT_ASSOC);
return 0;
}
int wps_build_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg)
{
u8 hash[SHA256_MAC_LEN];
wpa_printf(MSG_DEBUG, "WPS: * Key Wrap Authenticator");
hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, wpabuf_head(msg),
wpabuf_len(msg), hash);
wpabuf_put_be16(msg, ATTR_KEY_WRAP_AUTH);
wpabuf_put_be16(msg, WPS_KWA_LEN);
wpabuf_put_data(msg, hash, WPS_KWA_LEN);
return 0;
}
int wps_build_encr_settings(struct wps_data *wps, struct wpabuf *msg,
struct wpabuf *plain)
{
size_t pad_len;
const size_t block_size = 16;
u8 *iv, *data;
wpa_printf(MSG_DEBUG, "WPS: * Encrypted Settings");
/* PKCS#5 v2.0 pad */
pad_len = block_size - wpabuf_len(plain) % block_size;
os_memset(wpabuf_put(plain, pad_len), pad_len, pad_len);
wpabuf_put_be16(msg, ATTR_ENCR_SETTINGS);
wpabuf_put_be16(msg, block_size + wpabuf_len(plain));
iv = wpabuf_put(msg, block_size);
if (os_get_random(iv, block_size) < 0)
return -1;
data = wpabuf_put(msg, 0);
wpabuf_put_buf(msg, plain);
if (aes_128_cbc_encrypt(wps->keywrapkey, iv, data, wpabuf_len(plain)))
return -1;
return 0;
}
static int wps_process_cred_network_idx(struct wps_credential *cred,
const u8 *idx)
{
if (idx == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"Network Index");
return -1;
}
wpa_printf(MSG_DEBUG, "WPS: Network Index: %d", *idx);
return 0;
}
static int wps_process_cred_ssid(struct wps_credential *cred, const u8 *ssid,
size_t ssid_len)
{
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include SSID");
return -1;
}
/* Remove zero-padding since some Registrar implementations seem to use
* hardcoded 32-octet length for this attribute */
while (ssid_len > 0 && ssid[ssid_len - 1] == 0)
ssid_len--;
wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", ssid, ssid_len);
if (ssid_len <= sizeof(cred->ssid)) {
os_memcpy(cred->ssid, ssid, ssid_len);
cred->ssid_len = ssid_len;
}
return 0;
}
static int wps_process_cred_auth_type(struct wps_credential *cred,
const u8 *auth_type)
{
if (auth_type == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"Authentication Type");
return -1;
}
cred->auth_type = WPA_GET_BE16(auth_type);
wpa_printf(MSG_DEBUG, "WPS: Authentication Type: 0x%x",
cred->auth_type);
return 0;
}
static int wps_process_cred_encr_type(struct wps_credential *cred,
const u8 *encr_type)
{
if (encr_type == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"Encryption Type");
return -1;
}
cred->encr_type = WPA_GET_BE16(encr_type);
wpa_printf(MSG_DEBUG, "WPS: Encryption Type: 0x%x",
cred->encr_type);
return 0;
}
static int wps_process_cred_network_key_idx(struct wps_credential *cred,
const u8 *key_idx)
{
if (key_idx == NULL)
return 0; /* optional attribute */
wpa_printf(MSG_DEBUG, "WPS: Network Key Index: %d", *key_idx);
cred->key_idx = *key_idx;
return 0;
}
static int wps_process_cred_network_key(struct wps_credential *cred,
const u8 *key, size_t key_len)
{
if (key == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"Network Key");
return -1;
}
wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key", key, key_len);
if (key_len <= sizeof(cred->key)) {
os_memcpy(cred->key, key, key_len);
cred->key_len = key_len;
}
return 0;
}
static int wps_process_cred_mac_addr(struct wps_credential *cred,
const u8 *mac_addr)
{
if (mac_addr == NULL) {
wpa_printf(MSG_DEBUG, "WPS: Credential did not include "
"MAC Address");
return -1;
}
wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR, MAC2STR(mac_addr));
os_memcpy(cred->mac_addr, mac_addr, ETH_ALEN);
return 0;
}
static int wps_process_cred_eap_type(struct wps_credential *cred,
const u8 *eap_type, size_t eap_type_len)
{
if (eap_type == NULL)
return 0; /* optional attribute */
wpa_hexdump(MSG_DEBUG, "WPS: EAP Type", eap_type, eap_type_len);
return 0;
}
static int wps_process_cred_eap_identity(struct wps_credential *cred,
const u8 *identity,
size_t identity_len)
{
if (identity == NULL)
return 0; /* optional attribute */
wpa_hexdump_ascii(MSG_DEBUG, "WPS: EAP Identity",
identity, identity_len);
return 0;
}
static int wps_process_cred_key_prov_auto(struct wps_credential *cred,
const u8 *key_prov_auto)
{
if (key_prov_auto == NULL)
return 0; /* optional attribute */
wpa_printf(MSG_DEBUG, "WPS: Key Provided Automatically: %d",
*key_prov_auto);
return 0;
}
static int wps_process_cred_802_1x_enabled(struct wps_credential *cred,
const u8 *dot1x_enabled)
{
if (dot1x_enabled == NULL)
return 0; /* optional attribute */
wpa_printf(MSG_DEBUG, "WPS: 802.1X Enabled: %d", *dot1x_enabled);
return 0;
}
int wps_process_cred(struct wps_parse_attr *attr,
struct wps_credential *cred)
{
wpa_printf(MSG_DEBUG, "WPS: Process Credential");
/* TODO: support multiple Network Keys */
if (wps_process_cred_network_idx(cred, attr->network_idx) ||
wps_process_cred_ssid(cred, attr->ssid, attr->ssid_len) ||
wps_process_cred_auth_type(cred, attr->auth_type) ||
wps_process_cred_encr_type(cred, attr->encr_type) ||
wps_process_cred_network_key_idx(cred, attr->network_key_idx) ||
wps_process_cred_network_key(cred, attr->network_key,
attr->network_key_len) ||
wps_process_cred_mac_addr(cred, attr->mac_addr) ||
wps_process_cred_eap_type(cred, attr->eap_type,
attr->eap_type_len) ||
wps_process_cred_eap_identity(cred, attr->eap_identity,
attr->eap_identity_len) ||
wps_process_cred_key_prov_auto(cred, attr->key_prov_auto) ||
wps_process_cred_802_1x_enabled(cred, attr->dot1x_enabled))
return -1;
return 0;
}
int wps_process_ap_settings(struct wps_parse_attr *attr,
struct wps_credential *cred)
{
wpa_printf(MSG_DEBUG, "WPS: Processing AP Settings");
os_memset(cred, 0, sizeof(*cred));
/* TODO: optional attributes New Password and Device Password ID */
if (wps_process_cred_ssid(cred, attr->ssid, attr->ssid_len) ||
wps_process_cred_auth_type(cred, attr->auth_type) ||
wps_process_cred_encr_type(cred, attr->encr_type) ||
wps_process_cred_network_key_idx(cred, attr->network_key_idx) ||
wps_process_cred_network_key(cred, attr->network_key,
attr->network_key_len) ||
wps_process_cred_mac_addr(cred, attr->mac_addr))
return -1;
return 0;
}

29
src/wps/wps_i.h
View file

@ -155,25 +155,26 @@ struct wps_parse_attr {
};
/* wps_common.c */
int wps_parse_msg(const struct wpabuf *msg, struct wps_parse_attr *attr);
void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
const char *label, u8 *res, size_t res_len);
int wps_build_public_key(struct wps_data *wps, struct wpabuf *msg);
int wps_build_config_methods(struct wpabuf *msg, u16 methods);
int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid);
int wps_build_dev_password_id(struct wpabuf *msg, u16 id);
int wps_build_config_error(struct wpabuf *msg, u16 err);
int wps_derive_keys(struct wps_data *wps);
int wps_derive_mgmt_keys(struct wps_data *wps);
int wps_build_authenticator(struct wps_data *wps, struct wpabuf *msg);
int wps_process_authenticator(struct wps_data *wps, const u8 *authenticator,
const struct wpabuf *msg);
void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
size_t dev_passwd_len);
struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
size_t encr_len);
int wps_process_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg,
const u8 *key_wrap_auth);
/* wps_attr_parse.c */
int wps_parse_msg(const struct wpabuf *msg, struct wps_parse_attr *attr);
/* wps_attr_build.c */
int wps_build_public_key(struct wps_data *wps, struct wpabuf *msg);
int wps_build_req_type(struct wpabuf *msg, enum wps_request_type type);
int wps_build_config_methods(struct wpabuf *msg, u16 methods);
int wps_build_uuid_e(struct wpabuf *msg, const u8 *uuid);
int wps_build_dev_password_id(struct wpabuf *msg, u16 id);
int wps_build_config_error(struct wpabuf *msg, u16 err);
int wps_build_authenticator(struct wps_data *wps, struct wpabuf *msg);
int wps_build_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg);
int wps_build_encr_settings(struct wps_data *wps, struct wpabuf *msg,
struct wpabuf *plain);
@ -185,6 +186,12 @@ int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg);
int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg);
int wps_build_conn_type_flags(struct wps_data *wps, struct wpabuf *msg);
int wps_build_assoc_state(struct wps_data *wps, struct wpabuf *msg);
/* wps_attr_process.c */
int wps_process_authenticator(struct wps_data *wps, const u8 *authenticator,
const struct wpabuf *msg);
int wps_process_key_wrap_auth(struct wps_data *wps, struct wpabuf *msg,
const u8 *key_wrap_auth);
int wps_process_cred(struct wps_parse_attr *attr,
struct wps_credential *cred);
int wps_process_ap_settings(struct wps_parse_attr *attr,

3
wpa_supplicant/Makefile
View file

@ -505,6 +505,9 @@ OBJS += ../src/utils/uuid.o
OBJS += ../src/eap_peer/eap_wsc.o ../src/eap_common/eap_wsc_common.o
OBJS += ../src/wps/wps.o
OBJS += ../src/wps/wps_common.o
OBJS += ../src/wps/wps_attr_parse.o
OBJS += ../src/wps/wps_attr_build.o
OBJS += ../src/wps/wps_attr_process.o
OBJS += ../src/wps/wps_dev_attr.o
OBJS += ../src/wps/wps_enrollee.o
OBJS += ../src/wps/wps_registrar.o