![Jouni Malinen](/assets/img/avatar_default.png)
There is not much point in building devices with WPS 1.0 only supported nowadays. As such, there is not sufficient justification for maintaining extra complexity for the CONFIG_WPS2 build option either. Remove this by enabling WSC 2.0 support unconditionally. Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
902 lines
21 KiB
C
902 lines
21 KiB
C
/*
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* Wi-Fi Protected Setup - common functionality
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* Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "common/defs.h"
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#include "common/ieee802_11_common.h"
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#include "crypto/aes_wrap.h"
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#include "crypto/crypto.h"
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#include "crypto/dh_group5.h"
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#include "crypto/sha1.h"
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#include "crypto/sha256.h"
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#include "crypto/random.h"
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#include "wps_i.h"
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#include "wps_dev_attr.h"
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void wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len,
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const char *label, u8 *res, size_t res_len)
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{
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u8 i_buf[4], key_bits[4];
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const u8 *addr[4];
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size_t len[4];
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int i, iter;
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u8 hash[SHA256_MAC_LEN], *opos;
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size_t left;
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WPA_PUT_BE32(key_bits, res_len * 8);
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addr[0] = i_buf;
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len[0] = sizeof(i_buf);
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addr[1] = label_prefix;
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len[1] = label_prefix_len;
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addr[2] = (const u8 *) label;
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len[2] = os_strlen(label);
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addr[3] = key_bits;
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len[3] = sizeof(key_bits);
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iter = (res_len + SHA256_MAC_LEN - 1) / SHA256_MAC_LEN;
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opos = res;
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left = res_len;
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for (i = 1; i <= iter; i++) {
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WPA_PUT_BE32(i_buf, i);
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hmac_sha256_vector(key, SHA256_MAC_LEN, 4, addr, len, hash);
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if (i < iter) {
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os_memcpy(opos, hash, SHA256_MAC_LEN);
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opos += SHA256_MAC_LEN;
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left -= SHA256_MAC_LEN;
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} else
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os_memcpy(opos, hash, left);
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}
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}
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int wps_derive_keys(struct wps_data *wps)
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{
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struct wpabuf *pubkey, *dh_shared;
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u8 dhkey[SHA256_MAC_LEN], kdk[SHA256_MAC_LEN];
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const u8 *addr[3];
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size_t len[3];
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u8 keys[WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN + WPS_EMSK_LEN];
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if (wps->dh_privkey == NULL) {
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wpa_printf(MSG_DEBUG, "WPS: Own DH private key not available");
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return -1;
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}
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pubkey = wps->registrar ? wps->dh_pubkey_e : wps->dh_pubkey_r;
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if (pubkey == NULL) {
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wpa_printf(MSG_DEBUG, "WPS: Peer DH public key not available");
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return -1;
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}
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wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH Private Key", wps->dh_privkey);
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wpa_hexdump_buf(MSG_DEBUG, "WPS: DH peer Public Key", pubkey);
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dh_shared = dh5_derive_shared(wps->dh_ctx, pubkey, wps->dh_privkey);
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dh5_free(wps->dh_ctx);
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wps->dh_ctx = NULL;
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dh_shared = wpabuf_zeropad(dh_shared, 192);
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if (dh_shared == NULL) {
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wpa_printf(MSG_DEBUG, "WPS: Failed to derive DH shared key");
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return -1;
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}
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/* Own DH private key is not needed anymore */
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wpabuf_free(wps->dh_privkey);
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wps->dh_privkey = NULL;
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wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH shared key", dh_shared);
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/* DHKey = SHA-256(g^AB mod p) */
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addr[0] = wpabuf_head(dh_shared);
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len[0] = wpabuf_len(dh_shared);
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sha256_vector(1, addr, len, dhkey);
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wpa_hexdump_key(MSG_DEBUG, "WPS: DHKey", dhkey, sizeof(dhkey));
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wpabuf_free(dh_shared);
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/* KDK = HMAC-SHA-256_DHKey(N1 || EnrolleeMAC || N2) */
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addr[0] = wps->nonce_e;
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len[0] = WPS_NONCE_LEN;
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addr[1] = wps->mac_addr_e;
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len[1] = ETH_ALEN;
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addr[2] = wps->nonce_r;
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len[2] = WPS_NONCE_LEN;
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hmac_sha256_vector(dhkey, sizeof(dhkey), 3, addr, len, kdk);
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wpa_hexdump_key(MSG_DEBUG, "WPS: KDK", kdk, sizeof(kdk));
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wps_kdf(kdk, NULL, 0, "Wi-Fi Easy and Secure Key Derivation",
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keys, sizeof(keys));
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os_memcpy(wps->authkey, keys, WPS_AUTHKEY_LEN);
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os_memcpy(wps->keywrapkey, keys + WPS_AUTHKEY_LEN, WPS_KEYWRAPKEY_LEN);
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os_memcpy(wps->emsk, keys + WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN,
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WPS_EMSK_LEN);
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wpa_hexdump_key(MSG_DEBUG, "WPS: AuthKey",
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wps->authkey, WPS_AUTHKEY_LEN);
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wpa_hexdump_key(MSG_DEBUG, "WPS: KeyWrapKey",
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wps->keywrapkey, WPS_KEYWRAPKEY_LEN);
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wpa_hexdump_key(MSG_DEBUG, "WPS: EMSK", wps->emsk, WPS_EMSK_LEN);
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return 0;
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}
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void wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd,
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size_t dev_passwd_len)
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{
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u8 hash[SHA256_MAC_LEN];
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hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, dev_passwd,
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(dev_passwd_len + 1) / 2, hash);
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os_memcpy(wps->psk1, hash, WPS_PSK_LEN);
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hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN,
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dev_passwd + (dev_passwd_len + 1) / 2,
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dev_passwd_len / 2, hash);
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os_memcpy(wps->psk2, hash, WPS_PSK_LEN);
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wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Device Password",
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dev_passwd, dev_passwd_len);
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wpa_hexdump_key(MSG_DEBUG, "WPS: PSK1", wps->psk1, WPS_PSK_LEN);
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wpa_hexdump_key(MSG_DEBUG, "WPS: PSK2", wps->psk2, WPS_PSK_LEN);
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}
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struct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr,
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size_t encr_len)
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{
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struct wpabuf *decrypted;
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const size_t block_size = 16;
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size_t i;
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u8 pad;
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const u8 *pos;
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/* AES-128-CBC */
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if (encr == NULL || encr_len < 2 * block_size || encr_len % block_size)
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{
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wpa_printf(MSG_DEBUG, "WPS: No Encrypted Settings received");
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return NULL;
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}
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decrypted = wpabuf_alloc(encr_len - block_size);
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if (decrypted == NULL)
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return NULL;
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wpa_hexdump(MSG_MSGDUMP, "WPS: Encrypted Settings", encr, encr_len);
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wpabuf_put_data(decrypted, encr + block_size, encr_len - block_size);
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if (aes_128_cbc_decrypt(wps->keywrapkey, encr, wpabuf_mhead(decrypted),
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wpabuf_len(decrypted))) {
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wpabuf_free(decrypted);
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return NULL;
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}
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wpa_hexdump_buf_key(MSG_MSGDUMP, "WPS: Decrypted Encrypted Settings",
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decrypted);
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pos = wpabuf_head_u8(decrypted) + wpabuf_len(decrypted) - 1;
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pad = *pos;
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if (pad > wpabuf_len(decrypted)) {
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wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad value");
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wpabuf_free(decrypted);
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return NULL;
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}
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for (i = 0; i < pad; i++) {
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if (*pos-- != pad) {
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wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad "
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"string");
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wpabuf_free(decrypted);
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return NULL;
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}
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}
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decrypted->used -= pad;
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return decrypted;
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}
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/**
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* wps_pin_checksum - Compute PIN checksum
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* @pin: Seven digit PIN (i.e., eight digit PIN without the checksum digit)
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* Returns: Checksum digit
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*/
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unsigned int wps_pin_checksum(unsigned int pin)
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{
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unsigned int accum = 0;
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while (pin) {
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accum += 3 * (pin % 10);
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pin /= 10;
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accum += pin % 10;
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pin /= 10;
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}
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return (10 - accum % 10) % 10;
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}
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/**
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* wps_pin_valid - Check whether a PIN has a valid checksum
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* @pin: Eight digit PIN (i.e., including the checksum digit)
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* Returns: 1 if checksum digit is valid, or 0 if not
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*/
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unsigned int wps_pin_valid(unsigned int pin)
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{
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return wps_pin_checksum(pin / 10) == (pin % 10);
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}
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/**
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* wps_generate_pin - Generate a random PIN
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* Returns: Eight digit PIN (i.e., including the checksum digit)
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*/
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unsigned int wps_generate_pin(void)
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{
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unsigned int val;
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/* Generate seven random digits for the PIN */
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if (random_get_bytes((unsigned char *) &val, sizeof(val)) < 0) {
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struct os_time now;
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os_get_time(&now);
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val = os_random() ^ now.sec ^ now.usec;
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}
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val %= 10000000;
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/* Append checksum digit */
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return val * 10 + wps_pin_checksum(val);
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}
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int wps_pin_str_valid(const char *pin)
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{
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const char *p;
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size_t len;
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p = pin;
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while (*p >= '0' && *p <= '9')
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p++;
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if (*p != '\0')
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return 0;
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len = p - pin;
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return len == 4 || len == 8;
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}
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void wps_fail_event(struct wps_context *wps, enum wps_msg_type msg,
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u16 config_error, u16 error_indication, const u8 *mac_addr)
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{
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union wps_event_data data;
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if (wps->event_cb == NULL)
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return;
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os_memset(&data, 0, sizeof(data));
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data.fail.msg = msg;
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data.fail.config_error = config_error;
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data.fail.error_indication = error_indication;
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os_memcpy(data.fail.peer_macaddr, mac_addr, ETH_ALEN);
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wps->event_cb(wps->cb_ctx, WPS_EV_FAIL, &data);
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}
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void wps_success_event(struct wps_context *wps, const u8 *mac_addr)
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{
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union wps_event_data data;
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if (wps->event_cb == NULL)
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return;
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os_memset(&data, 0, sizeof(data));
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os_memcpy(data.success.peer_macaddr, mac_addr, ETH_ALEN);
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wps->event_cb(wps->cb_ctx, WPS_EV_SUCCESS, &data);
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}
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void wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part,
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const u8 *mac_addr)
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{
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union wps_event_data data;
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if (wps->event_cb == NULL)
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return;
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os_memset(&data, 0, sizeof(data));
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data.pwd_auth_fail.enrollee = enrollee;
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data.pwd_auth_fail.part = part;
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os_memcpy(data.pwd_auth_fail.peer_macaddr, mac_addr, ETH_ALEN);
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wps->event_cb(wps->cb_ctx, WPS_EV_PWD_AUTH_FAIL, &data);
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}
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void wps_pbc_overlap_event(struct wps_context *wps)
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{
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if (wps->event_cb == NULL)
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return;
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wps->event_cb(wps->cb_ctx, WPS_EV_PBC_OVERLAP, NULL);
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}
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void wps_pbc_timeout_event(struct wps_context *wps)
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{
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if (wps->event_cb == NULL)
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return;
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wps->event_cb(wps->cb_ctx, WPS_EV_PBC_TIMEOUT, NULL);
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}
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void wps_pbc_active_event(struct wps_context *wps)
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{
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if (wps->event_cb == NULL)
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return;
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wps->event_cb(wps->cb_ctx, WPS_EV_PBC_ACTIVE, NULL);
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}
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void wps_pbc_disable_event(struct wps_context *wps)
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{
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if (wps->event_cb == NULL)
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return;
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wps->event_cb(wps->cb_ctx, WPS_EV_PBC_DISABLE, NULL);
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}
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#ifdef CONFIG_WPS_OOB
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struct wpabuf * wps_get_oob_cred(struct wps_context *wps, int rf_band,
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int channel)
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{
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struct wps_data data;
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struct wpabuf *plain;
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plain = wpabuf_alloc(500);
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if (plain == NULL) {
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wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB "
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"credential");
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return NULL;
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}
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os_memset(&data, 0, sizeof(data));
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data.wps = wps;
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data.auth_type = wps->auth_types;
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data.encr_type = wps->encr_types;
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if (wps_build_cred(&data, plain) ||
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(rf_band && wps_build_rf_bands_attr(plain, rf_band)) ||
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(channel && wps_build_ap_channel(plain, channel)) ||
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wps_build_mac_addr(plain, wps->dev.mac_addr) ||
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wps_build_wfa_ext(plain, 0, NULL, 0)) {
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os_free(data.new_psk);
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wpabuf_free(plain);
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return NULL;
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}
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if (wps->wps_state == WPS_STATE_NOT_CONFIGURED && data.new_psk &&
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wps->ap) {
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struct wps_credential cred;
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wpa_printf(MSG_DEBUG, "WPS: Moving to Configured state based "
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"on credential token generation");
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os_memset(&cred, 0, sizeof(cred));
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os_memcpy(cred.ssid, wps->ssid, wps->ssid_len);
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cred.ssid_len = wps->ssid_len;
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cred.auth_type = WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK;
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cred.encr_type = WPS_ENCR_TKIP | WPS_ENCR_AES;
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os_memcpy(cred.key, data.new_psk, data.new_psk_len);
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cred.key_len = data.new_psk_len;
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wps->wps_state = WPS_STATE_CONFIGURED;
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wpa_hexdump_ascii_key(MSG_DEBUG,
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"WPS: Generated random passphrase",
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data.new_psk, data.new_psk_len);
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if (wps->cred_cb)
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wps->cred_cb(wps->cb_ctx, &cred);
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}
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os_free(data.new_psk);
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return plain;
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}
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struct wpabuf * wps_build_nfc_pw_token(u16 dev_pw_id,
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const struct wpabuf *pubkey,
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const struct wpabuf *dev_pw)
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{
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struct wpabuf *data;
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data = wpabuf_alloc(200);
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if (data == NULL)
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return NULL;
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if (wps_build_oob_dev_pw(data, dev_pw_id, pubkey,
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wpabuf_head(dev_pw), wpabuf_len(dev_pw)) ||
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wps_build_wfa_ext(data, 0, NULL, 0)) {
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wpa_printf(MSG_ERROR, "WPS: Failed to build NFC password "
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"token");
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wpabuf_free(data);
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return NULL;
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}
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return data;
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}
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int wps_oob_use_cred(struct wps_context *wps, struct wps_parse_attr *attr)
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{
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struct wpabuf msg;
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size_t i;
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for (i = 0; i < attr->num_cred; i++) {
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struct wps_credential local_cred;
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struct wps_parse_attr cattr;
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os_memset(&local_cred, 0, sizeof(local_cred));
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wpabuf_set(&msg, attr->cred[i], attr->cred_len[i]);
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if (wps_parse_msg(&msg, &cattr) < 0 ||
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wps_process_cred(&cattr, &local_cred)) {
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wpa_printf(MSG_ERROR, "WPS: Failed to parse OOB "
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"credential");
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return -1;
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}
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wps->cred_cb(wps->cb_ctx, &local_cred);
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}
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return 0;
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}
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#endif /* CONFIG_WPS_OOB */
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int wps_dev_type_str2bin(const char *str, u8 dev_type[WPS_DEV_TYPE_LEN])
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{
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const char *pos;
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/* <categ>-<OUI>-<subcateg> */
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WPA_PUT_BE16(dev_type, atoi(str));
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pos = os_strchr(str, '-');
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if (pos == NULL)
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return -1;
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pos++;
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if (hexstr2bin(pos, &dev_type[2], 4))
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return -1;
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pos = os_strchr(pos, '-');
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if (pos == NULL)
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return -1;
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pos++;
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WPA_PUT_BE16(&dev_type[6], atoi(pos));
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return 0;
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}
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char * wps_dev_type_bin2str(const u8 dev_type[WPS_DEV_TYPE_LEN], char *buf,
|
|
size_t buf_len)
|
|
{
|
|
int ret;
|
|
|
|
ret = os_snprintf(buf, buf_len, "%u-%08X-%u",
|
|
WPA_GET_BE16(dev_type), WPA_GET_BE32(&dev_type[2]),
|
|
WPA_GET_BE16(&dev_type[6]));
|
|
if (ret < 0 || (unsigned int) ret >= buf_len)
|
|
return NULL;
|
|
|
|
return buf;
|
|
}
|
|
|
|
|
|
void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid)
|
|
{
|
|
const u8 *addr[2];
|
|
size_t len[2];
|
|
u8 hash[SHA1_MAC_LEN];
|
|
u8 nsid[16] = {
|
|
0x52, 0x64, 0x80, 0xf8,
|
|
0xc9, 0x9b,
|
|
0x4b, 0xe5,
|
|
0xa6, 0x55,
|
|
0x58, 0xed, 0x5f, 0x5d, 0x60, 0x84
|
|
};
|
|
|
|
addr[0] = nsid;
|
|
len[0] = sizeof(nsid);
|
|
addr[1] = mac_addr;
|
|
len[1] = 6;
|
|
sha1_vector(2, addr, len, hash);
|
|
os_memcpy(uuid, hash, 16);
|
|
|
|
/* Version: 5 = named-based version using SHA-1 */
|
|
uuid[6] = (5 << 4) | (uuid[6] & 0x0f);
|
|
|
|
/* Variant specified in RFC 4122 */
|
|
uuid[8] = 0x80 | (uuid[8] & 0x3f);
|
|
}
|
|
|
|
|
|
u16 wps_config_methods_str2bin(const char *str)
|
|
{
|
|
u16 methods = 0;
|
|
|
|
if (str == NULL) {
|
|
/* Default to enabling methods based on build configuration */
|
|
methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
|
|
methods |= WPS_CONFIG_VIRT_DISPLAY;
|
|
#ifdef CONFIG_WPS_NFC
|
|
methods |= WPS_CONFIG_NFC_INTERFACE;
|
|
#endif /* CONFIG_WPS_NFC */
|
|
} else {
|
|
if (os_strstr(str, "ethernet"))
|
|
methods |= WPS_CONFIG_ETHERNET;
|
|
if (os_strstr(str, "label"))
|
|
methods |= WPS_CONFIG_LABEL;
|
|
if (os_strstr(str, "display"))
|
|
methods |= WPS_CONFIG_DISPLAY;
|
|
if (os_strstr(str, "ext_nfc_token"))
|
|
methods |= WPS_CONFIG_EXT_NFC_TOKEN;
|
|
if (os_strstr(str, "int_nfc_token"))
|
|
methods |= WPS_CONFIG_INT_NFC_TOKEN;
|
|
if (os_strstr(str, "nfc_interface"))
|
|
methods |= WPS_CONFIG_NFC_INTERFACE;
|
|
if (os_strstr(str, "push_button"))
|
|
methods |= WPS_CONFIG_PUSHBUTTON;
|
|
if (os_strstr(str, "keypad"))
|
|
methods |= WPS_CONFIG_KEYPAD;
|
|
if (os_strstr(str, "virtual_display"))
|
|
methods |= WPS_CONFIG_VIRT_DISPLAY;
|
|
if (os_strstr(str, "physical_display"))
|
|
methods |= WPS_CONFIG_PHY_DISPLAY;
|
|
if (os_strstr(str, "virtual_push_button"))
|
|
methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
|
|
if (os_strstr(str, "physical_push_button"))
|
|
methods |= WPS_CONFIG_PHY_PUSHBUTTON;
|
|
}
|
|
|
|
return methods;
|
|
}
|
|
|
|
|
|
struct wpabuf * wps_build_wsc_ack(struct wps_data *wps)
|
|
{
|
|
struct wpabuf *msg;
|
|
|
|
wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK");
|
|
|
|
msg = wpabuf_alloc(1000);
|
|
if (msg == NULL)
|
|
return NULL;
|
|
|
|
if (wps_build_version(msg) ||
|
|
wps_build_msg_type(msg, WPS_WSC_ACK) ||
|
|
wps_build_enrollee_nonce(wps, msg) ||
|
|
wps_build_registrar_nonce(wps, msg) ||
|
|
wps_build_wfa_ext(msg, 0, NULL, 0)) {
|
|
wpabuf_free(msg);
|
|
return NULL;
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
|
|
struct wpabuf * wps_build_wsc_nack(struct wps_data *wps)
|
|
{
|
|
struct wpabuf *msg;
|
|
|
|
wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK");
|
|
|
|
msg = wpabuf_alloc(1000);
|
|
if (msg == NULL)
|
|
return NULL;
|
|
|
|
if (wps_build_version(msg) ||
|
|
wps_build_msg_type(msg, WPS_WSC_NACK) ||
|
|
wps_build_enrollee_nonce(wps, msg) ||
|
|
wps_build_registrar_nonce(wps, msg) ||
|
|
wps_build_config_error(msg, wps->config_error) ||
|
|
wps_build_wfa_ext(msg, 0, NULL, 0)) {
|
|
wpabuf_free(msg);
|
|
return NULL;
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_WPS_NFC
|
|
|
|
struct wpabuf * wps_nfc_token_build(int ndef, int id, struct wpabuf *pubkey,
|
|
struct wpabuf *dev_pw)
|
|
{
|
|
struct wpabuf *ret;
|
|
|
|
if (pubkey == NULL || dev_pw == NULL)
|
|
return NULL;
|
|
|
|
ret = wps_build_nfc_pw_token(id, pubkey, dev_pw);
|
|
if (ndef && ret) {
|
|
struct wpabuf *tmp;
|
|
tmp = ndef_build_wifi(ret);
|
|
wpabuf_free(ret);
|
|
if (tmp == NULL)
|
|
return NULL;
|
|
ret = tmp;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
int wps_nfc_gen_dh(struct wpabuf **pubkey, struct wpabuf **privkey)
|
|
{
|
|
struct wpabuf *priv = NULL, *pub = NULL;
|
|
void *dh_ctx;
|
|
|
|
dh_ctx = dh5_init(&priv, &pub);
|
|
if (dh_ctx == NULL)
|
|
return -1;
|
|
pub = wpabuf_zeropad(pub, 192);
|
|
if (pub == NULL) {
|
|
wpabuf_free(priv);
|
|
return -1;
|
|
}
|
|
wpa_hexdump_buf(MSG_DEBUG, "WPS: Generated new DH pubkey", pub);
|
|
dh5_free(dh_ctx);
|
|
|
|
wpabuf_free(*pubkey);
|
|
*pubkey = pub;
|
|
wpabuf_free(*privkey);
|
|
*privkey = priv;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct wpabuf * wps_nfc_token_gen(int ndef, int *id, struct wpabuf **pubkey,
|
|
struct wpabuf **privkey,
|
|
struct wpabuf **dev_pw)
|
|
{
|
|
struct wpabuf *pw;
|
|
u16 val;
|
|
|
|
pw = wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN);
|
|
if (pw == NULL)
|
|
return NULL;
|
|
|
|
if (random_get_bytes(wpabuf_put(pw, WPS_OOB_DEVICE_PASSWORD_LEN),
|
|
WPS_OOB_DEVICE_PASSWORD_LEN) ||
|
|
random_get_bytes((u8 *) &val, sizeof(val))) {
|
|
wpabuf_free(pw);
|
|
return NULL;
|
|
}
|
|
|
|
if (wps_nfc_gen_dh(pubkey, privkey) < 0) {
|
|
wpabuf_free(pw);
|
|
return NULL;
|
|
}
|
|
|
|
*id = 0x10 + val % 0xfff0;
|
|
wpabuf_free(*dev_pw);
|
|
*dev_pw = pw;
|
|
|
|
return wps_nfc_token_build(ndef, *id, *pubkey, *dev_pw);
|
|
}
|
|
|
|
|
|
struct wpabuf * wps_build_nfc_handover_req(struct wps_context *ctx,
|
|
struct wpabuf *nfc_dh_pubkey)
|
|
{
|
|
struct wpabuf *msg;
|
|
void *len;
|
|
|
|
if (ctx == NULL)
|
|
return NULL;
|
|
|
|
wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
|
|
"handover request");
|
|
|
|
if (nfc_dh_pubkey == NULL) {
|
|
wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
|
|
"configured");
|
|
return NULL;
|
|
}
|
|
|
|
msg = wpabuf_alloc(1000);
|
|
if (msg == NULL)
|
|
return msg;
|
|
len = wpabuf_put(msg, 2);
|
|
|
|
if (wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
|
|
nfc_dh_pubkey, NULL, 0) ||
|
|
wps_build_uuid_e(msg, ctx->uuid) ||
|
|
wps_build_wfa_ext(msg, 0, NULL, 0)) {
|
|
wpabuf_free(msg);
|
|
return NULL;
|
|
}
|
|
|
|
WPA_PUT_BE16(len, wpabuf_len(msg) - 2);
|
|
|
|
return msg;
|
|
}
|
|
|
|
|
|
static int wps_build_ssid(struct wpabuf *msg, struct wps_context *wps)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "WPS: * SSID");
|
|
wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID in Connection Handover Select",
|
|
wps->ssid, wps->ssid_len);
|
|
wpabuf_put_be16(msg, ATTR_SSID);
|
|
wpabuf_put_be16(msg, wps->ssid_len);
|
|
wpabuf_put_data(msg, wps->ssid, wps->ssid_len);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wps_build_ap_freq(struct wpabuf *msg, int freq)
|
|
{
|
|
enum hostapd_hw_mode mode;
|
|
u8 channel, rf_band;
|
|
u16 ap_channel;
|
|
|
|
if (freq <= 0)
|
|
return 0;
|
|
|
|
mode = ieee80211_freq_to_chan(freq, &channel);
|
|
if (mode == NUM_HOSTAPD_MODES)
|
|
return 0; /* Unknown channel */
|
|
|
|
if (mode == HOSTAPD_MODE_IEEE80211G || mode == HOSTAPD_MODE_IEEE80211B)
|
|
rf_band = WPS_RF_24GHZ;
|
|
else if (mode == HOSTAPD_MODE_IEEE80211A)
|
|
rf_band = WPS_RF_50GHZ;
|
|
else
|
|
return 0; /* Unknown band */
|
|
ap_channel = channel;
|
|
|
|
if (wps_build_rf_bands_attr(msg, rf_band) ||
|
|
wps_build_ap_channel(msg, ap_channel))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
struct wpabuf * wps_build_nfc_handover_sel(struct wps_context *ctx,
|
|
struct wpabuf *nfc_dh_pubkey,
|
|
const u8 *bssid, int freq)
|
|
{
|
|
struct wpabuf *msg;
|
|
void *len;
|
|
|
|
if (ctx == NULL)
|
|
return NULL;
|
|
|
|
wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
|
|
"handover select");
|
|
|
|
if (nfc_dh_pubkey == NULL) {
|
|
wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
|
|
"configured");
|
|
return NULL;
|
|
}
|
|
|
|
msg = wpabuf_alloc(1000);
|
|
if (msg == NULL)
|
|
return msg;
|
|
len = wpabuf_put(msg, 2);
|
|
|
|
if (wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
|
|
nfc_dh_pubkey, NULL, 0) ||
|
|
wps_build_ssid(msg, ctx) ||
|
|
wps_build_ap_freq(msg, freq) ||
|
|
(bssid && wps_build_mac_addr(msg, bssid)) ||
|
|
wps_build_wfa_ext(msg, 0, NULL, 0)) {
|
|
wpabuf_free(msg);
|
|
return NULL;
|
|
}
|
|
|
|
WPA_PUT_BE16(len, wpabuf_len(msg) - 2);
|
|
|
|
return msg;
|
|
}
|
|
|
|
|
|
struct wpabuf * wps_build_nfc_handover_req_p2p(struct wps_context *ctx,
|
|
struct wpabuf *nfc_dh_pubkey)
|
|
{
|
|
struct wpabuf *msg;
|
|
|
|
if (ctx == NULL)
|
|
return NULL;
|
|
|
|
wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
|
|
"handover request (P2P)");
|
|
|
|
if (nfc_dh_pubkey == NULL) {
|
|
wpa_printf(MSG_DEBUG, "WPS: No NFC DH Public Key configured");
|
|
return NULL;
|
|
}
|
|
|
|
msg = wpabuf_alloc(1000);
|
|
if (msg == NULL)
|
|
return msg;
|
|
|
|
if (wps_build_manufacturer(&ctx->dev, msg) ||
|
|
wps_build_model_name(&ctx->dev, msg) ||
|
|
wps_build_model_number(&ctx->dev, msg) ||
|
|
wps_build_oob_dev_pw(msg, DEV_PW_NFC_CONNECTION_HANDOVER,
|
|
nfc_dh_pubkey, NULL, 0) ||
|
|
wps_build_rf_bands(&ctx->dev, msg, 0) ||
|
|
wps_build_serial_number(&ctx->dev, msg) ||
|
|
wps_build_uuid_e(msg, ctx->uuid) ||
|
|
wps_build_wfa_ext(msg, 0, NULL, 0)) {
|
|
wpabuf_free(msg);
|
|
return NULL;
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
|
|
struct wpabuf * wps_build_nfc_handover_sel_p2p(struct wps_context *ctx,
|
|
int nfc_dev_pw_id,
|
|
struct wpabuf *nfc_dh_pubkey,
|
|
struct wpabuf *nfc_dev_pw)
|
|
{
|
|
struct wpabuf *msg;
|
|
const u8 *dev_pw;
|
|
size_t dev_pw_len;
|
|
|
|
if (ctx == NULL)
|
|
return NULL;
|
|
|
|
wpa_printf(MSG_DEBUG, "WPS: Building attributes for NFC connection "
|
|
"handover select (P2P)");
|
|
|
|
if (nfc_dh_pubkey == NULL ||
|
|
(nfc_dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER &&
|
|
nfc_dev_pw == NULL)) {
|
|
wpa_printf(MSG_DEBUG, "WPS: No NFC OOB Device Password "
|
|
"configured");
|
|
return NULL;
|
|
}
|
|
|
|
msg = wpabuf_alloc(1000);
|
|
if (msg == NULL)
|
|
return msg;
|
|
|
|
if (nfc_dev_pw) {
|
|
dev_pw = wpabuf_head(nfc_dev_pw);
|
|
dev_pw_len = wpabuf_len(nfc_dev_pw);
|
|
} else {
|
|
dev_pw = NULL;
|
|
dev_pw_len = 0;
|
|
}
|
|
|
|
if (wps_build_manufacturer(&ctx->dev, msg) ||
|
|
wps_build_model_name(&ctx->dev, msg) ||
|
|
wps_build_model_number(&ctx->dev, msg) ||
|
|
wps_build_oob_dev_pw(msg, nfc_dev_pw_id, nfc_dh_pubkey,
|
|
dev_pw, dev_pw_len) ||
|
|
wps_build_rf_bands(&ctx->dev, msg, 0) ||
|
|
wps_build_serial_number(&ctx->dev, msg) ||
|
|
wps_build_uuid_e(msg, ctx->uuid) ||
|
|
wps_build_wfa_ext(msg, 0, NULL, 0)) {
|
|
wpabuf_free(msg);
|
|
return NULL;
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
#endif /* CONFIG_WPS_NFC */
|