1189251Ssam/* 2189251Ssam * Wi-Fi Protected Setup - common functionality 3252726Srpaulo * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi> 4189251Ssam * 5252726Srpaulo * This software may be distributed under the terms of the BSD license. 6252726Srpaulo * See README for more details. 7189251Ssam */ 8189251Ssam 9189251Ssam#include "includes.h" 10189251Ssam 11189251Ssam#include "common.h" 12214734Srpaulo#include "crypto/aes_wrap.h" 13214734Srpaulo#include "crypto/crypto.h" 14214734Srpaulo#include "crypto/dh_group5.h" 15214734Srpaulo#include "crypto/sha1.h" 16214734Srpaulo#include "crypto/sha256.h" 17252726Srpaulo#include "crypto/random.h" 18189251Ssam#include "wps_i.h" 19189251Ssam 20189251Ssam 21189251Ssamvoid wps_kdf(const u8 *key, const u8 *label_prefix, size_t label_prefix_len, 22189251Ssam const char *label, u8 *res, size_t res_len) 23189251Ssam{ 24189251Ssam u8 i_buf[4], key_bits[4]; 25189251Ssam const u8 *addr[4]; 26189251Ssam size_t len[4]; 27189251Ssam int i, iter; 28189251Ssam u8 hash[SHA256_MAC_LEN], *opos; 29189251Ssam size_t left; 30189251Ssam 31189251Ssam WPA_PUT_BE32(key_bits, res_len * 8); 32189251Ssam 33189251Ssam addr[0] = i_buf; 34189251Ssam len[0] = sizeof(i_buf); 35189251Ssam addr[1] = label_prefix; 36189251Ssam len[1] = label_prefix_len; 37189251Ssam addr[2] = (const u8 *) label; 38189251Ssam len[2] = os_strlen(label); 39189251Ssam addr[3] = key_bits; 40189251Ssam len[3] = sizeof(key_bits); 41189251Ssam 42189251Ssam iter = (res_len + SHA256_MAC_LEN - 1) / SHA256_MAC_LEN; 43189251Ssam opos = res; 44189251Ssam left = res_len; 45189251Ssam 46189251Ssam for (i = 1; i <= iter; i++) { 47189251Ssam WPA_PUT_BE32(i_buf, i); 48189251Ssam hmac_sha256_vector(key, SHA256_MAC_LEN, 4, addr, len, hash); 49189251Ssam if (i < iter) { 50189251Ssam os_memcpy(opos, hash, SHA256_MAC_LEN); 51189251Ssam opos += SHA256_MAC_LEN; 52189251Ssam left -= SHA256_MAC_LEN; 53189251Ssam } else 54189251Ssam os_memcpy(opos, hash, left); 55189251Ssam } 56189251Ssam} 57189251Ssam 58189251Ssam 59189251Ssamint wps_derive_keys(struct wps_data *wps) 60189251Ssam{ 61189251Ssam struct wpabuf *pubkey, *dh_shared; 62189251Ssam u8 dhkey[SHA256_MAC_LEN], kdk[SHA256_MAC_LEN]; 63189251Ssam const u8 *addr[3]; 64189251Ssam size_t len[3]; 65189251Ssam u8 keys[WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN + WPS_EMSK_LEN]; 66189251Ssam 67189251Ssam if (wps->dh_privkey == NULL) { 68189251Ssam wpa_printf(MSG_DEBUG, "WPS: Own DH private key not available"); 69189251Ssam return -1; 70189251Ssam } 71189251Ssam 72189251Ssam pubkey = wps->registrar ? wps->dh_pubkey_e : wps->dh_pubkey_r; 73189251Ssam if (pubkey == NULL) { 74189251Ssam wpa_printf(MSG_DEBUG, "WPS: Peer DH public key not available"); 75189251Ssam return -1; 76189251Ssam } 77189251Ssam 78252726Srpaulo wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH Private Key", wps->dh_privkey); 79252726Srpaulo wpa_hexdump_buf(MSG_DEBUG, "WPS: DH peer Public Key", pubkey); 80214734Srpaulo dh_shared = dh5_derive_shared(wps->dh_ctx, pubkey, wps->dh_privkey); 81214734Srpaulo dh5_free(wps->dh_ctx); 82214734Srpaulo wps->dh_ctx = NULL; 83189251Ssam dh_shared = wpabuf_zeropad(dh_shared, 192); 84189251Ssam if (dh_shared == NULL) { 85189251Ssam wpa_printf(MSG_DEBUG, "WPS: Failed to derive DH shared key"); 86189251Ssam return -1; 87189251Ssam } 88189251Ssam 89189251Ssam /* Own DH private key is not needed anymore */ 90189251Ssam wpabuf_free(wps->dh_privkey); 91189251Ssam wps->dh_privkey = NULL; 92189251Ssam 93189251Ssam wpa_hexdump_buf_key(MSG_DEBUG, "WPS: DH shared key", dh_shared); 94189251Ssam 95189251Ssam /* DHKey = SHA-256(g^AB mod p) */ 96189251Ssam addr[0] = wpabuf_head(dh_shared); 97189251Ssam len[0] = wpabuf_len(dh_shared); 98189251Ssam sha256_vector(1, addr, len, dhkey); 99189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPS: DHKey", dhkey, sizeof(dhkey)); 100189251Ssam wpabuf_free(dh_shared); 101189251Ssam 102189251Ssam /* KDK = HMAC-SHA-256_DHKey(N1 || EnrolleeMAC || N2) */ 103189251Ssam addr[0] = wps->nonce_e; 104189251Ssam len[0] = WPS_NONCE_LEN; 105189251Ssam addr[1] = wps->mac_addr_e; 106189251Ssam len[1] = ETH_ALEN; 107189251Ssam addr[2] = wps->nonce_r; 108189251Ssam len[2] = WPS_NONCE_LEN; 109189251Ssam hmac_sha256_vector(dhkey, sizeof(dhkey), 3, addr, len, kdk); 110189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPS: KDK", kdk, sizeof(kdk)); 111189251Ssam 112189251Ssam wps_kdf(kdk, NULL, 0, "Wi-Fi Easy and Secure Key Derivation", 113189251Ssam keys, sizeof(keys)); 114189251Ssam os_memcpy(wps->authkey, keys, WPS_AUTHKEY_LEN); 115189251Ssam os_memcpy(wps->keywrapkey, keys + WPS_AUTHKEY_LEN, WPS_KEYWRAPKEY_LEN); 116189251Ssam os_memcpy(wps->emsk, keys + WPS_AUTHKEY_LEN + WPS_KEYWRAPKEY_LEN, 117189251Ssam WPS_EMSK_LEN); 118189251Ssam 119189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPS: AuthKey", 120189251Ssam wps->authkey, WPS_AUTHKEY_LEN); 121189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPS: KeyWrapKey", 122189251Ssam wps->keywrapkey, WPS_KEYWRAPKEY_LEN); 123189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPS: EMSK", wps->emsk, WPS_EMSK_LEN); 124189251Ssam 125189251Ssam return 0; 126189251Ssam} 127189251Ssam 128189251Ssam 129189251Ssamvoid wps_derive_psk(struct wps_data *wps, const u8 *dev_passwd, 130189251Ssam size_t dev_passwd_len) 131189251Ssam{ 132189251Ssam u8 hash[SHA256_MAC_LEN]; 133189251Ssam 134189251Ssam hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, dev_passwd, 135189251Ssam (dev_passwd_len + 1) / 2, hash); 136189251Ssam os_memcpy(wps->psk1, hash, WPS_PSK_LEN); 137189251Ssam hmac_sha256(wps->authkey, WPS_AUTHKEY_LEN, 138189251Ssam dev_passwd + (dev_passwd_len + 1) / 2, 139189251Ssam dev_passwd_len / 2, hash); 140189251Ssam os_memcpy(wps->psk2, hash, WPS_PSK_LEN); 141189251Ssam 142189251Ssam wpa_hexdump_ascii_key(MSG_DEBUG, "WPS: Device Password", 143189251Ssam dev_passwd, dev_passwd_len); 144189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPS: PSK1", wps->psk1, WPS_PSK_LEN); 145189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPS: PSK2", wps->psk2, WPS_PSK_LEN); 146189251Ssam} 147189251Ssam 148189251Ssam 149189251Ssamstruct wpabuf * wps_decrypt_encr_settings(struct wps_data *wps, const u8 *encr, 150189251Ssam size_t encr_len) 151189251Ssam{ 152189251Ssam struct wpabuf *decrypted; 153189251Ssam const size_t block_size = 16; 154189251Ssam size_t i; 155189251Ssam u8 pad; 156189251Ssam const u8 *pos; 157189251Ssam 158189251Ssam /* AES-128-CBC */ 159189251Ssam if (encr == NULL || encr_len < 2 * block_size || encr_len % block_size) 160189251Ssam { 161189251Ssam wpa_printf(MSG_DEBUG, "WPS: No Encrypted Settings received"); 162189251Ssam return NULL; 163189251Ssam } 164189251Ssam 165189251Ssam decrypted = wpabuf_alloc(encr_len - block_size); 166189251Ssam if (decrypted == NULL) 167189251Ssam return NULL; 168189251Ssam 169189251Ssam wpa_hexdump(MSG_MSGDUMP, "WPS: Encrypted Settings", encr, encr_len); 170189251Ssam wpabuf_put_data(decrypted, encr + block_size, encr_len - block_size); 171189251Ssam if (aes_128_cbc_decrypt(wps->keywrapkey, encr, wpabuf_mhead(decrypted), 172189251Ssam wpabuf_len(decrypted))) { 173189251Ssam wpabuf_free(decrypted); 174189251Ssam return NULL; 175189251Ssam } 176189251Ssam 177189251Ssam wpa_hexdump_buf_key(MSG_MSGDUMP, "WPS: Decrypted Encrypted Settings", 178189251Ssam decrypted); 179189251Ssam 180189251Ssam pos = wpabuf_head_u8(decrypted) + wpabuf_len(decrypted) - 1; 181189251Ssam pad = *pos; 182189251Ssam if (pad > wpabuf_len(decrypted)) { 183189251Ssam wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad value"); 184189251Ssam wpabuf_free(decrypted); 185189251Ssam return NULL; 186189251Ssam } 187189251Ssam for (i = 0; i < pad; i++) { 188189251Ssam if (*pos-- != pad) { 189189251Ssam wpa_printf(MSG_DEBUG, "WPS: Invalid PKCS#5 v2.0 pad " 190189251Ssam "string"); 191189251Ssam wpabuf_free(decrypted); 192189251Ssam return NULL; 193189251Ssam } 194189251Ssam } 195189251Ssam decrypted->used -= pad; 196189251Ssam 197189251Ssam return decrypted; 198189251Ssam} 199189251Ssam 200189251Ssam 201189251Ssam/** 202189251Ssam * wps_pin_checksum - Compute PIN checksum 203189251Ssam * @pin: Seven digit PIN (i.e., eight digit PIN without the checksum digit) 204189251Ssam * Returns: Checksum digit 205189251Ssam */ 206189251Ssamunsigned int wps_pin_checksum(unsigned int pin) 207189251Ssam{ 208189251Ssam unsigned int accum = 0; 209189251Ssam while (pin) { 210189251Ssam accum += 3 * (pin % 10); 211189251Ssam pin /= 10; 212189251Ssam accum += pin % 10; 213189251Ssam pin /= 10; 214189251Ssam } 215189251Ssam 216189251Ssam return (10 - accum % 10) % 10; 217189251Ssam} 218189251Ssam 219189251Ssam 220189251Ssam/** 221189251Ssam * wps_pin_valid - Check whether a PIN has a valid checksum 222189251Ssam * @pin: Eight digit PIN (i.e., including the checksum digit) 223189251Ssam * Returns: 1 if checksum digit is valid, or 0 if not 224189251Ssam */ 225189251Ssamunsigned int wps_pin_valid(unsigned int pin) 226189251Ssam{ 227189251Ssam return wps_pin_checksum(pin / 10) == (pin % 10); 228189251Ssam} 229189251Ssam 230189251Ssam 231189251Ssam/** 232189251Ssam * wps_generate_pin - Generate a random PIN 233189251Ssam * Returns: Eight digit PIN (i.e., including the checksum digit) 234189251Ssam */ 235189251Ssamunsigned int wps_generate_pin(void) 236189251Ssam{ 237189251Ssam unsigned int val; 238189251Ssam 239189251Ssam /* Generate seven random digits for the PIN */ 240252726Srpaulo if (random_get_bytes((unsigned char *) &val, sizeof(val)) < 0) { 241189251Ssam struct os_time now; 242189251Ssam os_get_time(&now); 243189251Ssam val = os_random() ^ now.sec ^ now.usec; 244189251Ssam } 245189251Ssam val %= 10000000; 246189251Ssam 247189251Ssam /* Append checksum digit */ 248189251Ssam return val * 10 + wps_pin_checksum(val); 249189251Ssam} 250189251Ssam 251189251Ssam 252252726Srpauloint wps_pin_str_valid(const char *pin) 253189251Ssam{ 254252726Srpaulo const char *p; 255252726Srpaulo size_t len; 256252726Srpaulo 257252726Srpaulo p = pin; 258252726Srpaulo while (*p >= '0' && *p <= '9') 259252726Srpaulo p++; 260252726Srpaulo if (*p != '\0') 261252726Srpaulo return 0; 262252726Srpaulo 263252726Srpaulo len = p - pin; 264252726Srpaulo return len == 4 || len == 8; 265252726Srpaulo} 266252726Srpaulo 267252726Srpaulo 268252726Srpaulovoid wps_fail_event(struct wps_context *wps, enum wps_msg_type msg, 269252726Srpaulo u16 config_error, u16 error_indication) 270252726Srpaulo{ 271189251Ssam union wps_event_data data; 272189251Ssam 273189251Ssam if (wps->event_cb == NULL) 274189251Ssam return; 275189251Ssam 276189251Ssam os_memset(&data, 0, sizeof(data)); 277189251Ssam data.fail.msg = msg; 278252726Srpaulo data.fail.config_error = config_error; 279252726Srpaulo data.fail.error_indication = error_indication; 280189251Ssam wps->event_cb(wps->cb_ctx, WPS_EV_FAIL, &data); 281189251Ssam} 282189251Ssam 283189251Ssam 284189251Ssamvoid wps_success_event(struct wps_context *wps) 285189251Ssam{ 286189251Ssam if (wps->event_cb == NULL) 287189251Ssam return; 288189251Ssam 289189251Ssam wps->event_cb(wps->cb_ctx, WPS_EV_SUCCESS, NULL); 290189251Ssam} 291189251Ssam 292189251Ssam 293189251Ssamvoid wps_pwd_auth_fail_event(struct wps_context *wps, int enrollee, int part) 294189251Ssam{ 295189251Ssam union wps_event_data data; 296189251Ssam 297189251Ssam if (wps->event_cb == NULL) 298189251Ssam return; 299189251Ssam 300189251Ssam os_memset(&data, 0, sizeof(data)); 301189251Ssam data.pwd_auth_fail.enrollee = enrollee; 302189251Ssam data.pwd_auth_fail.part = part; 303189251Ssam wps->event_cb(wps->cb_ctx, WPS_EV_PWD_AUTH_FAIL, &data); 304189251Ssam} 305209158Srpaulo 306209158Srpaulo 307209158Srpaulovoid wps_pbc_overlap_event(struct wps_context *wps) 308209158Srpaulo{ 309209158Srpaulo if (wps->event_cb == NULL) 310209158Srpaulo return; 311209158Srpaulo 312209158Srpaulo wps->event_cb(wps->cb_ctx, WPS_EV_PBC_OVERLAP, NULL); 313209158Srpaulo} 314209158Srpaulo 315209158Srpaulo 316209158Srpaulovoid wps_pbc_timeout_event(struct wps_context *wps) 317209158Srpaulo{ 318209158Srpaulo if (wps->event_cb == NULL) 319209158Srpaulo return; 320209158Srpaulo 321209158Srpaulo wps->event_cb(wps->cb_ctx, WPS_EV_PBC_TIMEOUT, NULL); 322209158Srpaulo} 323214734Srpaulo 324214734Srpaulo 325214734Srpaulo#ifdef CONFIG_WPS_OOB 326214734Srpaulo 327252726Srpaulostruct wpabuf * wps_get_oob_cred(struct wps_context *wps) 328214734Srpaulo{ 329214734Srpaulo struct wps_data data; 330214734Srpaulo struct wpabuf *plain; 331214734Srpaulo 332214734Srpaulo plain = wpabuf_alloc(500); 333214734Srpaulo if (plain == NULL) { 334214734Srpaulo wpa_printf(MSG_ERROR, "WPS: Failed to allocate memory for OOB " 335214734Srpaulo "credential"); 336214734Srpaulo return NULL; 337214734Srpaulo } 338214734Srpaulo 339214734Srpaulo os_memset(&data, 0, sizeof(data)); 340214734Srpaulo data.wps = wps; 341214734Srpaulo data.auth_type = wps->auth_types; 342214734Srpaulo data.encr_type = wps->encr_types; 343252726Srpaulo if (wps_build_version(plain) || 344252726Srpaulo wps_build_cred(&data, plain) || 345252726Srpaulo wps_build_wfa_ext(plain, 0, NULL, 0)) { 346214734Srpaulo wpabuf_free(plain); 347214734Srpaulo return NULL; 348214734Srpaulo } 349214734Srpaulo 350214734Srpaulo return plain; 351214734Srpaulo} 352214734Srpaulo 353214734Srpaulo 354252726Srpaulostruct wpabuf * wps_build_nfc_pw_token(u16 dev_pw_id, 355252726Srpaulo const struct wpabuf *pubkey, 356252726Srpaulo const struct wpabuf *dev_pw) 357214734Srpaulo{ 358214734Srpaulo struct wpabuf *data; 359214734Srpaulo 360252726Srpaulo data = wpabuf_alloc(200); 361252726Srpaulo if (data == NULL) 362214734Srpaulo return NULL; 363214734Srpaulo 364214734Srpaulo if (wps_build_version(data) || 365252726Srpaulo wps_build_oob_dev_pw(data, dev_pw_id, pubkey, 366252726Srpaulo wpabuf_head(dev_pw), wpabuf_len(dev_pw)) || 367252726Srpaulo wps_build_wfa_ext(data, 0, NULL, 0)) { 368252726Srpaulo wpa_printf(MSG_ERROR, "WPS: Failed to build NFC password " 369252726Srpaulo "token"); 370214734Srpaulo wpabuf_free(data); 371214734Srpaulo return NULL; 372214734Srpaulo } 373214734Srpaulo 374214734Srpaulo return data; 375214734Srpaulo} 376214734Srpaulo 377214734Srpaulo 378252726Srpauloint wps_oob_use_cred(struct wps_context *wps, struct wps_parse_attr *attr) 379214734Srpaulo{ 380214734Srpaulo struct wpabuf msg; 381214734Srpaulo size_t i; 382214734Srpaulo 383252726Srpaulo for (i = 0; i < attr->num_cred; i++) { 384214734Srpaulo struct wps_credential local_cred; 385214734Srpaulo struct wps_parse_attr cattr; 386214734Srpaulo 387214734Srpaulo os_memset(&local_cred, 0, sizeof(local_cred)); 388252726Srpaulo wpabuf_set(&msg, attr->cred[i], attr->cred_len[i]); 389214734Srpaulo if (wps_parse_msg(&msg, &cattr) < 0 || 390214734Srpaulo wps_process_cred(&cattr, &local_cred)) { 391214734Srpaulo wpa_printf(MSG_ERROR, "WPS: Failed to parse OOB " 392214734Srpaulo "credential"); 393214734Srpaulo return -1; 394214734Srpaulo } 395214734Srpaulo wps->cred_cb(wps->cb_ctx, &local_cred); 396214734Srpaulo } 397214734Srpaulo 398214734Srpaulo return 0; 399214734Srpaulo} 400214734Srpaulo 401214734Srpaulo 402214734Srpaulo#endif /* CONFIG_WPS_OOB */ 403214734Srpaulo 404214734Srpaulo 405214734Srpauloint wps_dev_type_str2bin(const char *str, u8 dev_type[WPS_DEV_TYPE_LEN]) 406214734Srpaulo{ 407214734Srpaulo const char *pos; 408214734Srpaulo 409214734Srpaulo /* <categ>-<OUI>-<subcateg> */ 410214734Srpaulo WPA_PUT_BE16(dev_type, atoi(str)); 411214734Srpaulo pos = os_strchr(str, '-'); 412214734Srpaulo if (pos == NULL) 413214734Srpaulo return -1; 414214734Srpaulo pos++; 415214734Srpaulo if (hexstr2bin(pos, &dev_type[2], 4)) 416214734Srpaulo return -1; 417214734Srpaulo pos = os_strchr(pos, '-'); 418214734Srpaulo if (pos == NULL) 419214734Srpaulo return -1; 420214734Srpaulo pos++; 421214734Srpaulo WPA_PUT_BE16(&dev_type[6], atoi(pos)); 422214734Srpaulo 423214734Srpaulo 424214734Srpaulo return 0; 425214734Srpaulo} 426214734Srpaulo 427214734Srpaulo 428214734Srpaulochar * wps_dev_type_bin2str(const u8 dev_type[WPS_DEV_TYPE_LEN], char *buf, 429214734Srpaulo size_t buf_len) 430214734Srpaulo{ 431214734Srpaulo int ret; 432214734Srpaulo 433214734Srpaulo ret = os_snprintf(buf, buf_len, "%u-%08X-%u", 434214734Srpaulo WPA_GET_BE16(dev_type), WPA_GET_BE32(&dev_type[2]), 435214734Srpaulo WPA_GET_BE16(&dev_type[6])); 436214734Srpaulo if (ret < 0 || (unsigned int) ret >= buf_len) 437214734Srpaulo return NULL; 438214734Srpaulo 439214734Srpaulo return buf; 440214734Srpaulo} 441214734Srpaulo 442214734Srpaulo 443214734Srpaulovoid uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid) 444214734Srpaulo{ 445214734Srpaulo const u8 *addr[2]; 446214734Srpaulo size_t len[2]; 447214734Srpaulo u8 hash[SHA1_MAC_LEN]; 448214734Srpaulo u8 nsid[16] = { 449214734Srpaulo 0x52, 0x64, 0x80, 0xf8, 450214734Srpaulo 0xc9, 0x9b, 451214734Srpaulo 0x4b, 0xe5, 452214734Srpaulo 0xa6, 0x55, 453214734Srpaulo 0x58, 0xed, 0x5f, 0x5d, 0x60, 0x84 454214734Srpaulo }; 455214734Srpaulo 456214734Srpaulo addr[0] = nsid; 457214734Srpaulo len[0] = sizeof(nsid); 458214734Srpaulo addr[1] = mac_addr; 459214734Srpaulo len[1] = 6; 460214734Srpaulo sha1_vector(2, addr, len, hash); 461214734Srpaulo os_memcpy(uuid, hash, 16); 462214734Srpaulo 463214734Srpaulo /* Version: 5 = named-based version using SHA-1 */ 464214734Srpaulo uuid[6] = (5 << 4) | (uuid[6] & 0x0f); 465214734Srpaulo 466214734Srpaulo /* Variant specified in RFC 4122 */ 467214734Srpaulo uuid[8] = 0x80 | (uuid[8] & 0x3f); 468214734Srpaulo} 469214734Srpaulo 470214734Srpaulo 471214734Srpaulou16 wps_config_methods_str2bin(const char *str) 472214734Srpaulo{ 473214734Srpaulo u16 methods = 0; 474214734Srpaulo 475214734Srpaulo if (str == NULL) { 476214734Srpaulo /* Default to enabling methods based on build configuration */ 477214734Srpaulo methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD; 478252726Srpaulo#ifdef CONFIG_WPS2 479252726Srpaulo methods |= WPS_CONFIG_VIRT_DISPLAY; 480252726Srpaulo#endif /* CONFIG_WPS2 */ 481214734Srpaulo#ifdef CONFIG_WPS_NFC 482214734Srpaulo methods |= WPS_CONFIG_NFC_INTERFACE; 483214734Srpaulo#endif /* CONFIG_WPS_NFC */ 484214734Srpaulo } else { 485214734Srpaulo if (os_strstr(str, "ethernet")) 486214734Srpaulo methods |= WPS_CONFIG_ETHERNET; 487214734Srpaulo if (os_strstr(str, "label")) 488214734Srpaulo methods |= WPS_CONFIG_LABEL; 489214734Srpaulo if (os_strstr(str, "display")) 490214734Srpaulo methods |= WPS_CONFIG_DISPLAY; 491214734Srpaulo if (os_strstr(str, "ext_nfc_token")) 492214734Srpaulo methods |= WPS_CONFIG_EXT_NFC_TOKEN; 493214734Srpaulo if (os_strstr(str, "int_nfc_token")) 494214734Srpaulo methods |= WPS_CONFIG_INT_NFC_TOKEN; 495214734Srpaulo if (os_strstr(str, "nfc_interface")) 496214734Srpaulo methods |= WPS_CONFIG_NFC_INTERFACE; 497214734Srpaulo if (os_strstr(str, "push_button")) 498214734Srpaulo methods |= WPS_CONFIG_PUSHBUTTON; 499214734Srpaulo if (os_strstr(str, "keypad")) 500214734Srpaulo methods |= WPS_CONFIG_KEYPAD; 501252726Srpaulo#ifdef CONFIG_WPS2 502252726Srpaulo if (os_strstr(str, "virtual_display")) 503252726Srpaulo methods |= WPS_CONFIG_VIRT_DISPLAY; 504252726Srpaulo if (os_strstr(str, "physical_display")) 505252726Srpaulo methods |= WPS_CONFIG_PHY_DISPLAY; 506252726Srpaulo if (os_strstr(str, "virtual_push_button")) 507252726Srpaulo methods |= WPS_CONFIG_VIRT_PUSHBUTTON; 508252726Srpaulo if (os_strstr(str, "physical_push_button")) 509252726Srpaulo methods |= WPS_CONFIG_PHY_PUSHBUTTON; 510252726Srpaulo#endif /* CONFIG_WPS2 */ 511214734Srpaulo } 512214734Srpaulo 513214734Srpaulo return methods; 514214734Srpaulo} 515252726Srpaulo 516252726Srpaulo 517252726Srpaulostruct wpabuf * wps_build_wsc_ack(struct wps_data *wps) 518252726Srpaulo{ 519252726Srpaulo struct wpabuf *msg; 520252726Srpaulo 521252726Srpaulo wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_ACK"); 522252726Srpaulo 523252726Srpaulo msg = wpabuf_alloc(1000); 524252726Srpaulo if (msg == NULL) 525252726Srpaulo return NULL; 526252726Srpaulo 527252726Srpaulo if (wps_build_version(msg) || 528252726Srpaulo wps_build_msg_type(msg, WPS_WSC_ACK) || 529252726Srpaulo wps_build_enrollee_nonce(wps, msg) || 530252726Srpaulo wps_build_registrar_nonce(wps, msg) || 531252726Srpaulo wps_build_wfa_ext(msg, 0, NULL, 0)) { 532252726Srpaulo wpabuf_free(msg); 533252726Srpaulo return NULL; 534252726Srpaulo } 535252726Srpaulo 536252726Srpaulo return msg; 537252726Srpaulo} 538252726Srpaulo 539252726Srpaulo 540252726Srpaulostruct wpabuf * wps_build_wsc_nack(struct wps_data *wps) 541252726Srpaulo{ 542252726Srpaulo struct wpabuf *msg; 543252726Srpaulo 544252726Srpaulo wpa_printf(MSG_DEBUG, "WPS: Building Message WSC_NACK"); 545252726Srpaulo 546252726Srpaulo msg = wpabuf_alloc(1000); 547252726Srpaulo if (msg == NULL) 548252726Srpaulo return NULL; 549252726Srpaulo 550252726Srpaulo if (wps_build_version(msg) || 551252726Srpaulo wps_build_msg_type(msg, WPS_WSC_NACK) || 552252726Srpaulo wps_build_enrollee_nonce(wps, msg) || 553252726Srpaulo wps_build_registrar_nonce(wps, msg) || 554252726Srpaulo wps_build_config_error(msg, wps->config_error) || 555252726Srpaulo wps_build_wfa_ext(msg, 0, NULL, 0)) { 556252726Srpaulo wpabuf_free(msg); 557252726Srpaulo return NULL; 558252726Srpaulo } 559252726Srpaulo 560252726Srpaulo return msg; 561252726Srpaulo} 562252726Srpaulo 563252726Srpaulo 564252726Srpaulo#ifdef CONFIG_WPS_NFC 565252726Srpaulostruct wpabuf * wps_nfc_token_gen(int ndef, int *id, struct wpabuf **pubkey, 566252726Srpaulo struct wpabuf **privkey, 567252726Srpaulo struct wpabuf **dev_pw) 568252726Srpaulo{ 569252726Srpaulo struct wpabuf *priv = NULL, *pub = NULL, *pw, *ret; 570252726Srpaulo void *dh_ctx; 571252726Srpaulo u16 val; 572252726Srpaulo 573252726Srpaulo pw = wpabuf_alloc(WPS_OOB_DEVICE_PASSWORD_LEN); 574252726Srpaulo if (pw == NULL) 575252726Srpaulo return NULL; 576252726Srpaulo 577252726Srpaulo if (random_get_bytes(wpabuf_put(pw, WPS_OOB_DEVICE_PASSWORD_LEN), 578252726Srpaulo WPS_OOB_DEVICE_PASSWORD_LEN) || 579252726Srpaulo random_get_bytes((u8 *) &val, sizeof(val))) { 580252726Srpaulo wpabuf_free(pw); 581252726Srpaulo return NULL; 582252726Srpaulo } 583252726Srpaulo 584252726Srpaulo dh_ctx = dh5_init(&priv, &pub); 585252726Srpaulo if (dh_ctx == NULL) { 586252726Srpaulo wpabuf_free(pw); 587252726Srpaulo return NULL; 588252726Srpaulo } 589252726Srpaulo dh5_free(dh_ctx); 590252726Srpaulo 591252726Srpaulo *id = 0x10 + val % 0xfff0; 592252726Srpaulo wpabuf_free(*pubkey); 593252726Srpaulo *pubkey = pub; 594252726Srpaulo wpabuf_free(*privkey); 595252726Srpaulo *privkey = priv; 596252726Srpaulo wpabuf_free(*dev_pw); 597252726Srpaulo *dev_pw = pw; 598252726Srpaulo 599252726Srpaulo ret = wps_build_nfc_pw_token(*id, *pubkey, *dev_pw); 600252726Srpaulo if (ndef && ret) { 601252726Srpaulo struct wpabuf *tmp; 602252726Srpaulo tmp = ndef_build_wifi(ret); 603252726Srpaulo wpabuf_free(ret); 604252726Srpaulo if (tmp == NULL) 605252726Srpaulo return NULL; 606252726Srpaulo ret = tmp; 607252726Srpaulo } 608252726Srpaulo 609252726Srpaulo return ret; 610252726Srpaulo} 611252726Srpaulo#endif /* CONFIG_WPS_NFC */ 612