Mark Bryars
9 years ago
parent
7cd63ac53d
commit
9328cad7f1
@ -0,0 +1,725 @@
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/*
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* This file is part of the TREZOR project.
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*
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* Copyright (C) 2015 Mark Bryars <mbryars@google.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include <ecdsa.h>
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#include "debug.h"
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#include "storage.h"
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#include "bip32.h"
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#include "layout2.h"
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#include "usb.h"
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#include "buttons.h"
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#include "trezor.h"
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#include "nist256p1.h"
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#include "rng.h"
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#include "u2f/u2f.h"
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#include "u2f/u2f_hid.h"
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#include "u2f/u2f_keys.h"
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#include "u2f.h"
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#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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// About 1/2 Second according to values used in protect.c
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#define U2F_TIMEOUT 840000/2
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#define U2F_OUT_PKT_BUFFER_LEN 128
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// Initialise without a cid
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static uint32_t cid = CID_BROADCAST;
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// Circular Output buffer
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static uint32_t u2f_out_start = 0;
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static uint32_t u2f_out_end = 0;
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static uint8_t u2f_out_packets[U2F_OUT_PKT_BUFFER_LEN][HID_RPT_SIZE];
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#define U2F_PUBKEY_LEN 65
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#define KEY_HANDLE_LEN 64
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// Auth/Register request state machine
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typedef enum {
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INIT = 0,
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BTN_NO = 1,
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BTN_YES = 2,
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AUTH = 10,
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AUTH_FAIL = 11,
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AUTH_PASS = 12,
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REG = 20,
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REG_FAIL = 21,
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REG_PASS = 22
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} U2F_STATE;
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static U2F_STATE last_req_state = INIT;
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typedef struct {
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uint8_t reserved;
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uint8_t appId[U2F_APPID_SIZE];
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uint8_t chal[U2F_CHAL_SIZE];
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uint8_t keyHandle[KEY_HANDLE_LEN];
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uint8_t pubKey[U2F_PUBKEY_LEN];
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} U2F_REGISTER_SIG_STR;
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typedef struct {
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uint8_t appId[U2F_APPID_SIZE];
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uint8_t flags;
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uint8_t ctr[4];
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uint8_t chal[U2F_CHAL_SIZE];
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} U2F_AUTHENTICATE_SIG_STR;
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uint8_t buttonState(void)
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{
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buttonUpdate();
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if ((button.NoDown > 10) || button.NoUp)
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return BTN_NO;
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if ((button.YesDown > 10) || button.YesUp)
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return BTN_YES;
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return 0;
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}
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void int2hex(uint8_t *dst, const uint32_t i)
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{
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dst[0] = '0' + ((i >> 28) & 0x0F);
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dst[1] = '0' + ((i >> 24) & 0x0F);
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dst[2] = '0' + ((i >> 20) & 0x0F);
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dst[3] = '0' + ((i >> 16) & 0x0F);
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dst[4] = '0' + ((i >> 12) & 0x0F);
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dst[5] = '0' + ((i >> 8) & 0x0F);
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dst[6] = '0' + ((i >> 4) & 0x0F);
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dst[7] = '0' + (i & 0x0F);
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dst[8] = '\0';
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int t = 0;
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for (; t < 8; t++) {
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if (dst[t] > '9')
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dst[t] += 7; // 'A'-'9'+1
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}
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}
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char *debugInt(const uint32_t i)
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{
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static uint8_t n = 0;
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static uint8_t id[8][9];
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int2hex(id[n], i);
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debugLog(0, "", (const char *)id[n]);
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char *ret = (char *)id[n];
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n = (n + 1) % 8;
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return ret;
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}
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static uint32_t dialog_timeout = 0;
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void LayoutHomeAfterTimeout(void)
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{
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static bool timeoutLock = false;
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if (timeoutLock || dialog_timeout == 0)
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return; // Dialog has cleared or already in loop
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timeoutLock = true;
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U2F_STATE rs = last_req_state;
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U2F_STATE bs = INIT;
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while (dialog_timeout-- && rs == last_req_state && bs == 0) {
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usbPoll(); // may trigger new request
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bs = buttonState();
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}
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timeoutLock = false;
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if (rs != last_req_state)
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return; // Reset by new request don't clear screen
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if (dialog_timeout == 0) {
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last_req_state += BTN_NO; // Timeout is like button no
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}
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else {
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last_req_state += bs;
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dialog_timeout = 0;
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}
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layoutHome();
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}
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uint32_t next_cid(void)
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{
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// extremely unlikely but hey
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do {
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cid = random32();
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} while (cid == 0 || cid == CID_BROADCAST);
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return cid;
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}
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void u2fhid_read(const U2FHID_FRAME *f)
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{
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static uint8_t seq, cmd;
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static uint32_t len;
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static uint8_t *buf_ptr;
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static uint8_t buf[7609];
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if ((f->cid != CID_BROADCAST) && (f->cid != cid)) {
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return; // Not for us
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}
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if (f->type & TYPE_INIT) {
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seq = 0;
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buf_ptr = buf;
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len = MSG_LEN(*f);
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cmd = f->type;
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memcpy(buf_ptr, f->init.data, sizeof(f->init.data));
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buf_ptr += sizeof(f->init.data);
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}
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else {
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if (f->cont.seq == seq) {
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seq++;
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memcpy(buf_ptr, f->cont.data, sizeof(f->cont.data));
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buf_ptr += sizeof(f->cont.data);
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}
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else {
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return send_u2fhid_error(ERR_INVALID_SEQ);
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}
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}
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// Broadcast is reserved for init
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if (cid == CID_BROADCAST && cmd != U2FHID_INIT)
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return;
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// Check length isnt bigger than spec max
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if (len > sizeof(buf))
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return send_u2fhid_error(ERR_INVALID_LEN);
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// Do we need to wait for more data
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if ((buf_ptr - buf) < (signed)len) {
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// debugLog(0, "", "u2fhid_read wait");
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return;
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}
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// We have all the data
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switch (cmd) {
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case U2FHID_PING:
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u2fhid_ping(buf, len);
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break;
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case U2FHID_MSG:
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u2fhid_msg((APDU *)buf, len);
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break;
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case U2FHID_LOCK:
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u2fhid_lock(buf, len);
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break;
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case U2FHID_INIT:
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u2fhid_init((const U2FHID_INIT_REQ *)buf);
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break;
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case U2FHID_WINK:
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u2fhid_wink(buf, len);
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break;
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// case U2FHID_SYNC:
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// u2fhid_sync(buf, len);
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break;
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default:
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send_u2fhid_error(ERR_INVALID_CMD);
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break;
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}
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}
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void u2fhid_ping(const uint8_t *buf, uint32_t len)
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{
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debugLog(0, "", "u2fhid_ping");
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send_u2fhid_msg(U2FHID_PING, buf, len);
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}
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void u2fhid_wink(const uint8_t *buf, uint32_t len)
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{
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debugLog(0, "", "u2fhid_wink");
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(void)buf;
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if (len > 0)
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return send_u2fhid_error(ERR_INVALID_LEN);
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if (dialog_timeout > 0)
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dialog_timeout = U2F_TIMEOUT;
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U2FHID_FRAME f;
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bzero(&f, sizeof(f));
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f.cid = cid;
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f.init.cmd = U2FHID_WINK;
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f.init.bcntl = 0;
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queue_u2f_pkt(&f);
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}
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void u2fhid_sync(const uint8_t *buf, uint32_t len)
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{
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debugLog(0, "", "u2fhid_sync");
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(void)buf;
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if (len > 0)
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return send_u2fhid_error(ERR_INVALID_LEN);
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// Abort things.
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dialog_timeout = 0;
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}
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void u2fhid_lock(const uint8_t *buf, uint32_t len)
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{
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debugLog(0, "", "u2fhid_lock");
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(void)buf;
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(void)len;
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send_u2fhid_error(ERR_INVALID_CMD);
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}
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void u2fhid_init(const U2FHID_INIT_REQ *init_req)
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{
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debugLog(0, "", "u2fhid_init");
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U2FHID_FRAME f;
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U2FHID_INIT_RESP *resp = (U2FHID_INIT_RESP *)f.init.data;
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bzero(&f, sizeof(f));
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f.cid = CID_BROADCAST;
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f.init.cmd = U2FHID_INIT;
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f.init.bcnth = 0;
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f.init.bcntl = sizeof(U2FHID_INIT_RESP);
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memcpy(resp->nonce, init_req->nonce, sizeof(init_req->nonce));
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resp->cid = next_cid();
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resp->versionInterface = U2FHID_IF_VERSION;
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resp->versionMajor = VERSION_MAJOR;
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resp->versionMinor = VERSION_MINOR;
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resp->versionBuild = VERSION_PATCH;
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resp->capFlags = CAPFLAG_WINK;
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queue_u2f_pkt(&f);
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}
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void queue_u2f_pkt(const U2FHID_FRAME *u2f_pkt)
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{
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// debugLog(0, "", "u2f_write_pkt");
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uint32_t next = (u2f_out_end + 1) % U2F_OUT_PKT_BUFFER_LEN;
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if (u2f_out_start == next) {
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debugLog(0, "", "u2f_write_pkt full");
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return; // Buffer full :(
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}
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memcpy(u2f_out_packets[u2f_out_end], u2f_pkt, HID_RPT_SIZE);
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u2f_out_end = next;
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}
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uint8_t *u2f_out_data(void)
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{
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if (u2f_out_start == u2f_out_end)
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return NULL; // No data
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// debugLog(0, "", "u2f_out_data");
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uint32_t t = u2f_out_start;
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u2f_out_start = (u2f_out_start + 1) % U2F_OUT_PKT_BUFFER_LEN;
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return u2f_out_packets[t];
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}
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void u2fhid_msg(const APDU *a, uint32_t len)
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{
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static bool lock = false;
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if ((APDU_LEN(*a) + sizeof(APDU)) > len) {
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debugLog(0, "", "BAD APDU LENGTH");
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debugInt(APDU_LEN(*a));
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debugInt(len);
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return;
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}
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// Very crude locking, incase another message comes in while we wait. This
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// actually can probably be removed as no code inside calls usbPoll anymore
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if (lock)
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return send_u2fhid_error(ERR_CHANNEL_BUSY);
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lock = true;
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switch (a->ins) {
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case U2F_REGISTER:
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u2f_register(a);
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break;
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case U2F_AUTHENTICATE:
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u2f_authenticate(a);
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break;
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case U2F_VERSION:
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u2f_version(a);
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break;
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default:
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debugLog(0, "", "u2f unknown cmd");
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send_u2f_error(U2F_SW_INS_NOT_SUPPORTED);
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}
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lock = false;
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LayoutHomeAfterTimeout();
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}
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void send_u2fhid_msg(const uint8_t cmd, const uint8_t *data, const uint32_t len)
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{
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U2FHID_FRAME f;
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uint8_t *p = (uint8_t *)data;
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uint32_t l = len;
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uint32_t psz;
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uint8_t seq = 0;
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// debugLog(0, "", "send_u2fhid_msg");
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bzero(&f, sizeof(f));
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f.cid = cid;
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f.init.cmd = cmd;
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f.init.bcnth = len >> 8;
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f.init.bcntl = len & 0xff;
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// Init packet
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psz = MIN(sizeof(f.init.data), l);
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memcpy(f.init.data, p, psz);
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queue_u2f_pkt(&f);
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l -= psz;
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p += psz;
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// Cont packet(s)
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for (; l > 0; l -= psz, p += psz) {
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// debugLog(0, "", "send_u2fhid_msg con");
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bzero(&f.cont.data, sizeof(f.cont.data));
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f.cont.seq = seq++;
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psz = MIN(sizeof(f.cont.data), l);
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memcpy(f.cont.data, p, psz);
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queue_u2f_pkt(&f);
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}
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if (data + len != p) {
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debugLog(0, "", "send_u2fhid_msg is bad");
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debugInt(data + len - p);
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}
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}
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void send_u2fhid_error(uint8_t err)
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{
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U2FHID_FRAME f;
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bzero(&f, sizeof(f));
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f.cid = cid;
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f.init.cmd = U2FHID_ERROR;
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f.init.bcntl = 1;
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f.init.data[0] = err;
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queue_u2f_pkt(&f);
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}
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void u2f_version(const APDU *a)
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{
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// INCLUDES SW_NO_ERROR
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static const uint8_t version_response[] = {'U', '2', 'F', '_',
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'V', '2', 0x90, 0x00};
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(void)a;
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debugLog(0, "", "u2f version");
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send_u2f_msg(version_response, sizeof(version_response));
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}
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const HDNode *getDerivedNode(uint32_t *address_n, size_t address_n_count)
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{
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static HDNode node;
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if (!storage_getRootNode(&node)) {
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layoutHome();
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debugLog(0, "", "ERR: Device not init");
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return 0;
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}
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if (!address_n || address_n_count == 0) {
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return &node;
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}
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if (hdnode_private_ckd_cached(&node, address_n, address_n_count) == 0) {
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layoutHome();
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debugLog(0, "", "ERR: Derive private failed");
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return 0;
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}
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return &node;
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}
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const HDNode *generateKeyHandle(const uint8_t app_id[], uint8_t key_handle[])
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{
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uint8_t keybase[64];
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// First half of keyhandle is random
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random_buffer(key_handle, 32);
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// prepare keypair from /random data
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const HDNode *node =
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getDerivedNode((uint32_t*)key_handle, 32/sizeof(uint32_t));
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// For second half of keyhandle
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// Signature of app_id and random data
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memcpy(&keybase[0], app_id, 32);
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memcpy(&keybase[32], key_handle, 32);
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uint8_t sig[64];
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ecdsa_sign(&nist256p1, node->private_key,
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(uint8_t *)&keybase, sizeof(keybase), sig,
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NULL);
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// Copy 32 bytes of signature into keyhandle
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memcpy(&key_handle[32], sig, 32);
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// Done!
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return node;
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}
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const HDNode *validateKeyHandle(const uint8_t app_id[], const uint8_t key_handle[])
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{
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uint8_t keybase[64];
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memcpy(&keybase[0], app_id, 32);
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memcpy(&keybase[32], key_handle, 32);
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const HDNode *node =
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getDerivedNode((uint32_t*)key_handle, 32/sizeof(uint32_t));
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uint8_t sig[64];
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ecdsa_sign(&nist256p1, node->private_key,
|
||||
(uint8_t *)&keybase, sizeof(keybase), sig,
|
||||
NULL);
|
||||
|
||||
if (memcmp(&key_handle[32], sig, 32) !=0)
|
||||
return NULL;
|
||||
|
||||
// Done!
|
||||
return node;
|
||||
}
|
||||
|
||||
|
||||
void u2f_register(const APDU *a)
|
||||
{
|
||||
static U2F_REGISTER_REQ last_req;
|
||||
const U2F_REGISTER_REQ *req = (U2F_REGISTER_REQ *)a->data;
|
||||
|
||||
// Validate basic request parameters
|
||||
debugLog(0, "", "u2f register");
|
||||
if (APDU_LEN(*a) != sizeof(U2F_REGISTER_REQ)) {
|
||||
debugLog(0, "", "u2f register - badlen");
|
||||
send_u2f_error(U2F_SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
|
||||
// If this request is different from last request, reset state machine
|
||||
if (memcmp(&last_req, req, sizeof(last_req)) != 0) {
|
||||
memcpy(&last_req, req, sizeof(last_req));
|
||||
last_req_state = INIT;
|
||||
}
|
||||
|
||||
// First Time request, return not present and display request dialog
|
||||
if (last_req_state == 0) {
|
||||
// wake up crypto system to be ready for signing
|
||||
getDerivedNode(NULL, 0);
|
||||
// error: testof-user-presence is required
|
||||
send_u2f_error(U2F_SW_CONDITIONS_NOT_SATISFIED);
|
||||
buttonUpdate(); // Clear button state
|
||||
layoutDialog(DIALOG_ICON_QUESTION, "Cancel", "Register",
|
||||
NULL, "Register U2F", "security key", "", "", "", NULL);
|
||||
dialog_timeout = U2F_TIMEOUT;
|
||||
last_req_state = REG;
|
||||
return;
|
||||
}
|
||||
|
||||
// Still awaiting Keypress
|
||||
if (last_req_state == REG) {
|
||||
// error: testof-user-presence is required
|
||||
send_u2f_error(U2F_SW_CONDITIONS_NOT_SATISFIED);
|
||||
dialog_timeout = U2F_TIMEOUT;
|
||||
return;
|
||||
}
|
||||
|
||||
// Buttons said no!
|
||||
if (last_req_state == REG_FAIL) {
|
||||
send_u2f_error(U2F_SW_WRONG_DATA); // error:bad key handle
|
||||
return;
|
||||
}
|
||||
|
||||
// Buttons said yes
|
||||
if (last_req_state == REG_PASS) {
|
||||
uint8_t data[sizeof(U2F_REGISTER_RESP) + 2];
|
||||
U2F_REGISTER_RESP *resp = (U2F_REGISTER_RESP *)&data;
|
||||
bzero(data, sizeof(data));
|
||||
|
||||
|
||||
resp->registerId = U2F_REGISTER_ID;
|
||||
resp->keyHandleLen = KEY_HANDLE_LEN;
|
||||
// Generate keypair for this appId
|
||||
const HDNode *node =
|
||||
generateKeyHandle(req->appId, (uint8_t*)&resp->keyHandleCertSig);
|
||||
|
||||
if (!node) {
|
||||
debugLog(0, "", "getDerivedNode Fail");
|
||||
send_u2f_error(U2F_SW_WRONG_DATA); // error:bad key handle
|
||||
return;
|
||||
}
|
||||
|
||||
ecdsa_get_public_key65(&nist256p1, node->private_key,
|
||||
(uint8_t *)&resp->pubKey);
|
||||
|
||||
memcpy(resp->keyHandleCertSig + resp->keyHandleLen,
|
||||
U2F_ATT_CERT, sizeof(U2F_ATT_CERT));
|
||||
|
||||
uint8_t sig[64];
|
||||
U2F_REGISTER_SIG_STR sig_base;
|
||||
sig_base.reserved = 0;
|
||||
memcpy(sig_base.appId, req->appId, U2F_APPID_SIZE);
|
||||
memcpy(sig_base.chal, req->chal, U2F_CHAL_SIZE);
|
||||
memcpy(sig_base.keyHandle, &resp->keyHandleCertSig, KEY_HANDLE_LEN);
|
||||
memcpy(sig_base.pubKey, &resp->pubKey, U2F_PUBKEY_LEN);
|
||||
ecdsa_sign(&nist256p1, U2F_ATT_PRIV_KEY, (uint8_t *)&sig_base,
|
||||
sizeof(sig_base), sig, NULL);
|
||||
|
||||
// Where to write the signature in the response
|
||||
uint8_t *resp_sig = resp->keyHandleCertSig +
|
||||
resp->keyHandleLen + sizeof(U2F_ATT_CERT);
|
||||
// Convert to der for the response
|
||||
const uint8_t sig_len = ecdsa_sig_to_der(sig, resp_sig);
|
||||
|
||||
// Append success bytes
|
||||
memcpy(resp->keyHandleCertSig + resp->keyHandleLen +
|
||||
sizeof(U2F_ATT_CERT) + sig_len,
|
||||
"\x90\x00", 2);
|
||||
|
||||
int l = 1 /* registerId */ + U2F_PUBKEY_LEN +
|
||||
1 /* keyhandleLen */ + resp->keyHandleLen +
|
||||
sizeof(U2F_ATT_CERT) + sig_len + 2;
|
||||
|
||||
send_u2f_msg(data, l);
|
||||
return;
|
||||
}
|
||||
|
||||
// Didnt expect to get here
|
||||
dialog_timeout = 0;
|
||||
}
|
||||
|
||||
void u2f_authenticate(const APDU *a)
|
||||
{
|
||||
const U2F_AUTHENTICATE_REQ *req = (U2F_AUTHENTICATE_REQ *)a->data;
|
||||
static U2F_AUTHENTICATE_REQ last_req;
|
||||
|
||||
if (APDU_LEN(*a) < 64) { /// FIXME: decent value
|
||||
debugLog(0, "", "u2f authenticate - badlen");
|
||||
send_u2f_error(U2F_SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
|
||||
if (req->keyHandleLen != KEY_HANDLE_LEN) {
|
||||
debugLog(0, "", "u2f auth - bad keyhandle len");
|
||||
send_u2f_error(U2F_SW_WRONG_DATA); // error:bad key handle
|
||||
return;
|
||||
}
|
||||
|
||||
const HDNode *node =
|
||||
validateKeyHandle(req->appId, req->keyHandle);
|
||||
|
||||
if (!node) {
|
||||
debugLog(0, "", "u2f auth - bad keyhandle len");
|
||||
send_u2f_error(U2F_SW_WRONG_DATA); // error:bad key handle
|
||||
return;
|
||||
}
|
||||
|
||||
if (a->p1 == U2F_AUTH_CHECK_ONLY) {
|
||||
debugLog(0, "", "u2f authenticate check");
|
||||
// This is a success for a good keyhandle
|
||||
// A failed check would have happened earlier
|
||||
// error: testof-user-presence is required
|
||||
send_u2f_error(U2F_SW_CONDITIONS_NOT_SATISFIED);
|
||||
return;
|
||||
}
|
||||
|
||||
if (a->p1 != U2F_AUTH_ENFORCE) {
|
||||
debugLog(0, "", "u2f authenticate unknown");
|
||||
// error:bad key handle
|
||||
send_u2f_error(U2F_SW_WRONG_DATA);
|
||||
return;
|
||||
}
|
||||
|
||||
debugLog(0, "", "u2f authenticate enforce");
|
||||
|
||||
if (memcmp(&last_req, req, sizeof(last_req)) != 0) {
|
||||
memcpy(&last_req, req, sizeof(last_req));
|
||||
last_req_state = INIT;
|
||||
}
|
||||
|
||||
if (last_req_state == INIT) {
|
||||
// error: testof-user-presence is required
|
||||
send_u2f_error(U2F_SW_CONDITIONS_NOT_SATISFIED);
|
||||
buttonUpdate(); // Clear button state
|
||||
layoutDialog(DIALOG_ICON_QUESTION, "Cancel", "Authenticate", NULL,
|
||||
"Authenticate U2F", "security key", "", "", "", NULL);
|
||||
dialog_timeout = U2F_TIMEOUT;
|
||||
last_req_state = AUTH;
|
||||
return;
|
||||
}
|
||||
|
||||
// Awaiting Keypress
|
||||
if (last_req_state == AUTH) {
|
||||
// error: testof-user-presence is required
|
||||
send_u2f_error(U2F_SW_CONDITIONS_NOT_SATISFIED);
|
||||
dialog_timeout = U2F_TIMEOUT;
|
||||
return;
|
||||
}
|
||||
|
||||
// Buttons said no!
|
||||
if (last_req_state == AUTH_FAIL) {
|
||||
send_u2f_error(
|
||||
U2F_SW_WRONG_DATA); // error:bad key handle
|
||||
return;
|
||||
}
|
||||
|
||||
// Buttons said yes
|
||||
if (last_req_state == AUTH_PASS) {
|
||||
uint8_t buf[sizeof(U2F_AUTHENTICATE_RESP) + 2];
|
||||
U2F_AUTHENTICATE_RESP *resp =
|
||||
(U2F_AUTHENTICATE_RESP *)&buf;
|
||||
|
||||
const uint32_t ctr = storage_nextU2FCounter();
|
||||
resp->flags = U2F_AUTH_FLAG_TUP;
|
||||
resp->ctr[0] = ctr >> 24 & 0xff;
|
||||
resp->ctr[1] = ctr >> 16 & 0xff;
|
||||
resp->ctr[2] = ctr >> 8 & 0xff;
|
||||
resp->ctr[3] = ctr & 0xff;
|
||||
|
||||
// Build and sign response
|
||||
U2F_AUTHENTICATE_SIG_STR sig_base;
|
||||
uint8_t sig[64];
|
||||
memcpy(sig_base.appId, req->appId, U2F_APPID_SIZE);
|
||||
sig_base.flags = resp->flags;
|
||||
memcpy(sig_base.ctr, resp->ctr, 4);
|
||||
memcpy(sig_base.chal, req->chal, U2F_CHAL_SIZE);
|
||||
ecdsa_sign(&nist256p1, node->private_key,
|
||||
(uint8_t *)&sig_base, sizeof(sig_base), sig,
|
||||
NULL);
|
||||
|
||||
// Copy DER encoded signature into response
|
||||
const uint8_t sig_len = ecdsa_sig_to_der(sig, resp->sig);
|
||||
|
||||
// Append OK
|
||||
memcpy(buf + sizeof(U2F_AUTHENTICATE_RESP) -
|
||||
U2F_MAX_EC_SIG_SIZE + sig_len,
|
||||
"\x90\x00", 2);
|
||||
send_u2f_msg(buf, sizeof(U2F_AUTHENTICATE_RESP) -
|
||||
U2F_MAX_EC_SIG_SIZE + sig_len +
|
||||
2);
|
||||
last_req_state = INIT;
|
||||
}
|
||||
}
|
||||
|
||||
void send_u2f_error(const uint16_t err)
|
||||
{
|
||||
uint8_t data[2];
|
||||
data[0] = err >> 8 & 0xFF;
|
||||
data[1] = err & 0xFF;
|
||||
send_u2f_msg(data, 2);
|
||||
}
|
||||
|
||||
void send_u2f_msg(const uint8_t *data, const uint32_t len)
|
||||
{
|
||||
send_u2fhid_msg(U2FHID_MSG, data, len);
|
||||
}
|
||||
@ -0,0 +1,58 @@
|
||||
/*
|
||||
* This file is part of the TREZOR project.
|
||||
*
|
||||
* Copyright (C) 2015 Mark Bryars <mbryars@google.com>
|
||||
*
|
||||
* This library is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#ifndef __U2F_H__
|
||||
#define __U2F_H__
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include "u2f/u2f_hid.h"
|
||||
#include "trezor.h"
|
||||
|
||||
typedef struct {
|
||||
uint8_t cla, ins, p1, p2;
|
||||
uint8_t lc1, lc2, lc3;
|
||||
uint8_t data[];
|
||||
} APDU;
|
||||
|
||||
#define APDU_LEN(A) (uint32_t)(((A).lc1 << 16) + ((A).lc2 << 8) + ((A).lc3))
|
||||
|
||||
void u2fhid_read(const U2FHID_FRAME *buf);
|
||||
bool u2fhid_write(uint8_t *buf);
|
||||
void u2fhid_init(const U2FHID_INIT_REQ *init_req);
|
||||
void u2fhid_ping(const uint8_t *buf, uint32_t len);
|
||||
void u2fhid_wink(const uint8_t *buf, uint32_t len);
|
||||
void u2fhid_sync(const uint8_t *buf, uint32_t len);
|
||||
void u2fhid_lock(const uint8_t *buf, uint32_t len);
|
||||
void u2fhid_msg(const APDU *a, uint32_t len);
|
||||
void queue_u2f_pkt(const U2FHID_FRAME *u2f_pkt);
|
||||
|
||||
uint8_t *u2f_out_data(void);
|
||||
void u2f_register(const APDU *a);
|
||||
void u2f_version(const APDU *a);
|
||||
void u2f_authenticate(const APDU *a);
|
||||
|
||||
void send_u2f_msg(const uint8_t *data, const uint32_t len);
|
||||
void send_u2f_error(const uint16_t err);
|
||||
|
||||
void send_u2fhid_msg(const uint8_t cmd, const uint8_t *data,
|
||||
const uint32_t len);
|
||||
void send_u2fhid_error(const uint8_t err);
|
||||
|
||||
#endif
|
||||
@ -0,0 +1,141 @@
|
||||
/*
|
||||
Copyright (C) 2013-2015 Yubico AB
|
||||
|
||||
This program is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1, or (at your option) any
|
||||
later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
|
||||
General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with this program; if not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
// Common U2F raw message format header.
|
||||
// 2014-08-14 J Ehrensvard, Yubico, Inc.
|
||||
|
||||
#ifndef __U2F_H_INCLUDED__
|
||||
#define __U2F_H_INCLUDED__
|
||||
|
||||
#ifdef _MSC_VER // Windows
|
||||
typedef unsigned char uint8_t;
|
||||
typedef unsigned short uint16_t;
|
||||
typedef unsigned int uint32_t;
|
||||
typedef unsigned long int uint64_t;
|
||||
#else
|
||||
#include <stdint.h>
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C"
|
||||
{
|
||||
#endif
|
||||
|
||||
// General constants
|
||||
|
||||
#define U2F_EC_KEY_SIZE 32 // EC key size in bytes
|
||||
#define U2F_EC_POINT_SIZE ((U2F_EC_KEY_SIZE * 2) + 1) // Size of EC point
|
||||
#define U2F_MAX_KH_SIZE 128 // Max size of key handle
|
||||
#define U2F_MAX_ATT_CERT_SIZE 1024 // Max size of attestation certificate
|
||||
#define U2F_MAX_EC_SIG_SIZE 72 // Max size of DER coded EC signature
|
||||
#define U2F_CTR_SIZE 4 // Size of counter field
|
||||
#define U2F_APPID_SIZE 32 // Size of application id
|
||||
#define U2F_CHAL_SIZE 32 // Size of challenge
|
||||
|
||||
#define ENC_SIZE(x) ((x + 7) & 0xfff8)
|
||||
|
||||
// EC (uncompressed) point
|
||||
|
||||
#define U2F_POINT_UNCOMPRESSED 0x04 // Uncompressed point format
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t pointFormat; // Point type
|
||||
uint8_t x[U2F_EC_KEY_SIZE]; // X-value
|
||||
uint8_t y[U2F_EC_KEY_SIZE]; // Y-value
|
||||
} U2F_EC_POINT;
|
||||
|
||||
// U2F native commands
|
||||
|
||||
#define U2F_REGISTER 0x01 // Registration command
|
||||
#define U2F_AUTHENTICATE 0x02 // Authenticate/sign command
|
||||
#define U2F_VERSION 0x03 // Read version string command
|
||||
|
||||
#define U2F_VENDOR_FIRST 0x40 // First vendor defined command
|
||||
#define U2F_VENDOR_LAST 0x7f // Last vendor defined command
|
||||
|
||||
// U2F_CMD_REGISTER command defines
|
||||
|
||||
#define U2F_REGISTER_ID 0x05 // Version 2 registration identifier
|
||||
#define U2F_REGISTER_HASH_ID 0x00 // Version 2 hash identintifier
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t chal[U2F_CHAL_SIZE]; // Challenge
|
||||
uint8_t appId[U2F_APPID_SIZE]; // Application id
|
||||
} U2F_REGISTER_REQ;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t registerId; // Registration identifier (U2F_REGISTER_ID_V2)
|
||||
U2F_EC_POINT pubKey; // Generated public key
|
||||
uint8_t keyHandleLen; // Length of key handle
|
||||
uint8_t keyHandleCertSig[U2F_MAX_KH_SIZE + // Key handle
|
||||
U2F_MAX_ATT_CERT_SIZE + // Attestation certificate
|
||||
U2F_MAX_EC_SIG_SIZE]; // Registration signature
|
||||
} U2F_REGISTER_RESP;
|
||||
|
||||
// U2F_CMD_AUTHENTICATE command defines
|
||||
|
||||
// Authentication control byte
|
||||
|
||||
#define U2F_AUTH_ENFORCE 0x03 // Enforce user presence and sign
|
||||
#define U2F_AUTH_CHECK_ONLY 0x07 // Check only
|
||||
#define U2F_AUTH_FLAG_TUP 0x01 // Test of user presence set
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t chal[U2F_CHAL_SIZE]; // Challenge
|
||||
uint8_t appId[U2F_APPID_SIZE]; // Application id
|
||||
uint8_t keyHandleLen; // Length of key handle
|
||||
uint8_t keyHandle[U2F_MAX_KH_SIZE]; // Key handle
|
||||
} U2F_AUTHENTICATE_REQ;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t flags; // U2F_AUTH_FLAG_ values
|
||||
uint8_t ctr[U2F_CTR_SIZE]; // Counter field (big-endian)
|
||||
uint8_t sig[U2F_MAX_EC_SIG_SIZE]; // Signature
|
||||
} U2F_AUTHENTICATE_RESP;
|
||||
|
||||
// Common raw message format (ISO7816-4:2005 mapping)
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t cla; // Class - reserved
|
||||
uint8_t ins; // U2F instruction
|
||||
uint8_t p1; // U2F parameter 1
|
||||
uint8_t p2; // U2F parameter 2
|
||||
uint8_t lc1; // Length field, set to zero
|
||||
uint8_t lc2; // Length field, MSB
|
||||
uint8_t lc3; // Length field, LSB
|
||||
uint8_t data[1]; // Data field
|
||||
} U2F_MSG;
|
||||
|
||||
// Command status responses
|
||||
|
||||
#define U2F_SW_NO_ERROR 0x9000 // SW_NO_ERROR
|
||||
#define U2F_SW_WRONG_DATA 0x6984 // SW_WRONG_DATA
|
||||
#define U2F_SW_CONDITIONS_NOT_SATISFIED 0x6985 // SW_CONDITIONS_NOT_SATISFIED
|
||||
#define U2F_SW_INS_NOT_SUPPORTED 0x6d00 // SW_INS_NOT_SUPPORTED
|
||||
#define U2F_SW_CLA_NOT_SUPPORTED 0x6e00 // SW_CLA_NOT_SUPPORTED
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif // __U2F_H_INCLUDED__
|
||||
@ -0,0 +1,140 @@
|
||||
/*
|
||||
Copyright (C) 2013-2015 Yubico AB
|
||||
|
||||
This program is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1, or (at your option) any
|
||||
later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
|
||||
General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with this program; if not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
// Common U2F HID transport header.
|
||||
// 2014-08-21 J Ehrensvard, Yubico, Inc.
|
||||
|
||||
#ifndef __U2FHID_H_INCLUDED__
|
||||
#define __U2FHID_H_INCLUDED__
|
||||
|
||||
#ifdef _MSC_VER // Windows
|
||||
typedef unsigned char uint8_t;
|
||||
typedef unsigned short uint16_t;
|
||||
typedef unsigned int uint32_t;
|
||||
typedef unsigned long int uint64_t;
|
||||
#else
|
||||
#include <stdint.h>
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C"
|
||||
{
|
||||
#endif
|
||||
|
||||
// Size of HID reports
|
||||
|
||||
#define HID_RPT_SIZE 64 // Default size of raw HID report
|
||||
|
||||
// Frame layout - command- and continuation frames
|
||||
|
||||
#define CID_BROADCAST 0xffffffff // Broadcast channel id
|
||||
|
||||
#define TYPE_MASK 0x80 // Frame type mask
|
||||
#define TYPE_INIT 0x80 // Initial frame identifier
|
||||
#define TYPE_CONT 0x00 // Continuation frame identifier
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint32_t cid; // Channel identifier
|
||||
union
|
||||
{
|
||||
uint8_t type; // Frame type - b7 defines type
|
||||
struct
|
||||
{
|
||||
uint8_t cmd; // Command - b7 set
|
||||
uint8_t bcnth; // Message byte count - high part
|
||||
uint8_t bcntl; // Message byte count - low part
|
||||
uint8_t data[HID_RPT_SIZE - 7]; // Data payload
|
||||
} init;
|
||||
struct
|
||||
{
|
||||
uint8_t seq; // Sequence number - b7 cleared
|
||||
uint8_t data[HID_RPT_SIZE - 5]; // Data payload
|
||||
} cont;
|
||||
};
|
||||
} U2FHID_FRAME;
|
||||
|
||||
#define FRAME_TYPE(f) ((f).type & TYPE_MASK)
|
||||
#define FRAME_CMD(f) ((f).init.cmd & ~TYPE_MASK)
|
||||
#define MSG_LEN(f) (((f).init.bcnth << 8) + (f).init.bcntl)
|
||||
#define FRAME_SEQ(f) ((f).cont.seq & ~TYPE_MASK)
|
||||
|
||||
// HID usage- and usage-page definitions
|
||||
|
||||
#define FIDO_USAGE_PAGE 0xf1d0 // FIDO alliance HID usage page
|
||||
#define FIDO_USAGE_U2FHID 0x01 // U2FHID usage for top-level collection
|
||||
#define FIDO_USAGE_DATA_IN 0x20 // Raw IN data report
|
||||
#define FIDO_USAGE_DATA_OUT 0x21 // Raw OUT data report
|
||||
|
||||
// General constants
|
||||
|
||||
#define U2FHID_IF_VERSION 2 // Current interface implementation version
|
||||
#define U2FHID_FRAME_TIMEOUT 500 // Default frame timeout in ms
|
||||
#define U2FHID_TRANS_TIMEOUT 3000 // Default message timeout in ms
|
||||
|
||||
// U2FHID native commands
|
||||
|
||||
#define U2FHID_PING (TYPE_INIT | 0x01) // Echo data through local processor only
|
||||
#define U2FHID_MSG (TYPE_INIT | 0x03) // Send U2F message frame
|
||||
#define U2FHID_LOCK (TYPE_INIT | 0x04) // Send lock channel command
|
||||
#define U2FHID_INIT (TYPE_INIT | 0x06) // Channel initialization
|
||||
#define U2FHID_WINK (TYPE_INIT | 0x08) // Send device identification wink
|
||||
#define U2FHID_ERROR (TYPE_INIT | 0x3f) // Error response
|
||||
|
||||
#define U2FHID_VENDOR_FIRST (TYPE_INIT | 0x40) // First vendor defined command
|
||||
#define U2FHID_VENDOR_LAST (TYPE_INIT | 0x7f) // Last vendor defined command
|
||||
|
||||
// U2FHID_INIT command defines
|
||||
|
||||
#define INIT_NONCE_SIZE 8 // Size of channel initialization challenge
|
||||
#define CAPFLAG_WINK 0x01 // Device supports WINK command
|
||||
#define CAPFLAG_LOCK 0x02 // Device supports LOCK command
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t nonce[INIT_NONCE_SIZE]; // Client application nonce
|
||||
} U2FHID_INIT_REQ;
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t nonce[INIT_NONCE_SIZE]; // Client application nonce
|
||||
uint32_t cid; // Channel identifier
|
||||
uint8_t versionInterface; // Interface version
|
||||
uint8_t versionMajor; // Major version number
|
||||
uint8_t versionMinor; // Minor version number
|
||||
uint8_t versionBuild; // Build version number
|
||||
uint8_t capFlags; // Capabilities flags
|
||||
} U2FHID_INIT_RESP;
|
||||
|
||||
// Low-level error codes. Return as negatives.
|
||||
|
||||
#define ERR_NONE 0x00 // No error
|
||||
#define ERR_INVALID_CMD 0x01 // Invalid command
|
||||
#define ERR_INVALID_PAR 0x02 // Invalid parameter
|
||||
#define ERR_INVALID_LEN 0x03 // Invalid message length
|
||||
#define ERR_INVALID_SEQ 0x04 // Invalid message sequencing
|
||||
#define ERR_MSG_TIMEOUT 0x05 // Message has timed out
|
||||
#define ERR_CHANNEL_BUSY 0x06 // Channel busy
|
||||
#define ERR_LOCK_REQUIRED 0x0a // Command requires channel lock
|
||||
#define ERR_INVALID_CID 0x0b // Command not allowed on this cid
|
||||
#define ERR_OTHER 0x7f // Other unspecified error
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif // __U2FHID_H_INCLUDED__
|
||||
@ -0,0 +1,46 @@
|
||||
#ifndef __U2F_KEYS_H_INCLUDED__
|
||||
#define __U2F_KEYS_H_INCLUDED__
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
uint8_t U2F_ATT_PRIV_KEY[] = {0x71, 0x26, 0xac, 0x2b, 0xf6, 0x44, 0xdc, 0x61,
|
||||
0x86, 0xad, 0x83, 0xef, 0x1f, 0xcd, 0xf1, 0x2a,
|
||||
0x57, 0xb5, 0xcf, 0xa2, 0x00, 0x0b, 0x8a, 0xd0,
|
||||
0x27, 0xe9, 0x56, 0xe8, 0x54, 0xc5, 0x0a, 0x8b};
|
||||
|
||||
uint8_t U2F_ATT_PUB_KEY[] = {
|
||||
0x04, 0xd9, 0x18, 0xbd, 0xfa, 0x8a, 0x54, 0xac, 0x92, 0xe9, 0x0d,
|
||||
0xa9, 0x1f, 0xca, 0x7a, 0xa2, 0x64, 0x54, 0xc0, 0xd1, 0x73, 0x36,
|
||||
0x31, 0x4d, 0xde, 0x83, 0xa5, 0x4b, 0x86, 0xb5, 0xdf, 0x4e, 0xf0,
|
||||
0x52, 0x65, 0x9a, 0x1d, 0x6f, 0xfc, 0xb7, 0x46, 0x7f, 0x1a, 0xcd,
|
||||
0xdb, 0x8a, 0x33, 0x08, 0x0b, 0x5e, 0xed, 0x91, 0x89, 0x13, 0xf4,
|
||||
0x43, 0xa5, 0x26, 0x1b, 0xc7, 0x7b, 0x68, 0x60, 0x6f, 0xc1};
|
||||
|
||||
uint8_t U2F_ATT_CERT[] = {
|
||||
0x30, 0x82, 0x01, 0x19, 0x30, 0x81, 0xC0, 0x02, 0x09, 0x00, 0x8B, 0x3F,
|
||||
0xA6, 0x46, 0xDE, 0x01, 0xCB, 0xB8, 0x30, 0x0A, 0x06, 0x08, 0x2A, 0x86,
|
||||
0x48, 0xCE, 0x3D, 0x04, 0x03, 0x02, 0x30, 0x15, 0x31, 0x13, 0x30, 0x11,
|
||||
0x06, 0x03, 0x55, 0x04, 0x03, 0x0C, 0x0A, 0x54, 0x72, 0x65, 0x7A, 0x6F,
|
||||
0x72, 0x20, 0x55, 0x32, 0x46, 0x30, 0x1E, 0x17, 0x0D, 0x31, 0x35, 0x31,
|
||||
0x30, 0x31, 0x31, 0x32, 0x33, 0x32, 0x33, 0x34, 0x36, 0x5A, 0x17, 0x0D,
|
||||
0x32, 0x35, 0x31, 0x30, 0x30, 0x38, 0x32, 0x33, 0x32, 0x33, 0x34, 0x36,
|
||||
0x5A, 0x30, 0x15, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x03,
|
||||
0x0C, 0x0A, 0x54, 0x72, 0x65, 0x7A, 0x6F, 0x72, 0x20, 0x55, 0x32, 0x46,
|
||||
0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x02,
|
||||
0x01, 0x06, 0x08, 0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01, 0x07, 0x03,
|
||||
0x42, 0x00, 0x04, 0xD9, 0x18, 0xBD, 0xFA, 0x8A, 0x54, 0xAC, 0x92, 0xE9,
|
||||
0x0D, 0xA9, 0x1F, 0xCA, 0x7A, 0xA2, 0x64, 0x54, 0xC0, 0xD1, 0x73, 0x36,
|
||||
0x31, 0x4D, 0xDE, 0x83, 0xA5, 0x4B, 0x86, 0xB5, 0xDF, 0x4E, 0xF0, 0x52,
|
||||
0x65, 0x9A, 0x1D, 0x6F, 0xFC, 0xB7, 0x46, 0x7F, 0x1A, 0xCD, 0xDB, 0x8A,
|
||||
0x33, 0x08, 0x0B, 0x5E, 0xED, 0x91, 0x89, 0x13, 0xF4, 0x43, 0xA5, 0x26,
|
||||
0x1B, 0xC7, 0x7B, 0x68, 0x60, 0x6F, 0xC1, 0x30, 0x0A, 0x06, 0x08, 0x2A,
|
||||
0x86, 0x48, 0xCE, 0x3D, 0x04, 0x03, 0x02, 0x03, 0x48, 0x00, 0x30, 0x45,
|
||||
0x02, 0x21, 0x00, 0x89, 0x38, 0x50, 0x13, 0xBB, 0x13, 0xF1, 0xE9, 0xEF,
|
||||
0x7A, 0x1B, 0x47, 0x59, 0x19, 0xBA, 0x18, 0x55, 0x32, 0xE6, 0x76, 0xD1,
|
||||
0xAD, 0x69, 0x9D, 0x97, 0x07, 0x89, 0x80, 0x08, 0x4F, 0xAA, 0xE8, 0x02,
|
||||
0x20, 0x35, 0x9A, 0x5F, 0x1D, 0xE5, 0x0A, 0x12, 0xA0, 0x9C, 0x96, 0x3D,
|
||||
0x5A, 0x39, 0xA8, 0x83, 0x3C, 0xBA, 0x2E, 0xAD, 0xD5, 0x90, 0x23, 0x85,
|
||||
0x81, 0x7D, 0xF0, 0xC7, 0x72, 0x8E, 0x79, 0x09, 0xD0,
|
||||
};
|
||||
|
||||
#endif // __U2F_KEYS_H_INCLUDED__
|
||||
@ -1 +1 @@
|
||||
Subproject commit 3fc31bfe9c42ebf3c0a63c48f44537994787f9c9
|
||||
Subproject commit 72268e816b8e8e06f698b3729223a255c7c74167
|
||||
Loading…
Reference in new issue