/*
* is_fw_update_mode() - Determines whether in firmware update mode or not
*
* INPUT
* none
* OUTPUT
* true/false whether firmware is in update mode
*
*/
static bool is_fw_update_mode(void)
{
#if DEBUG_LINK
return true;
#else
return keepkey_button_down();
#endif
}
void u2fhid_read_start(const U2FHID_FRAME *f) {
U2F_ReadBuffer readbuffer;
memzero(&readbuffer, sizeof(readbuffer));
if (!(f->type & TYPE_INIT)) {
return;
}
// Broadcast is reserved for init
if (f->cid == CID_BROADCAST || f->cid == 0) {
send_u2fhid_error(f->cid, ERR_INVALID_CID);
return;
}
if ((unsigned)MSG_LEN(*f) > sizeof(reader->buf)) {
send_u2fhid_error(f->cid, ERR_INVALID_LEN);
return;
}
reader = &readbuffer;
u2fhid_init_cmd(f);
usbTiny(1);
for(;;) {
// Do we need to wait for more data
while ((reader->buf_ptr - reader->buf) < (signed)reader->len) {
uint8_t lastseq = reader->seq;
uint8_t lastcmd = reader->cmd;
int counter = U2F_TIMEOUT;
while (reader->seq == lastseq && reader->cmd == lastcmd) {
if (counter-- == 0) {
// timeout
send_u2fhid_error(cid, ERR_MSG_TIMEOUT);
cid = 0;
reader = 0;
usbTiny(0);
layoutHome();
return;
}
usbPoll();
}
}
// We have all the data
switch (reader->cmd) {
case 0:
// message was aborted by init
break;
case U2FHID_PING:
u2fhid_ping(reader->buf, reader->len);
break;
case U2FHID_MSG:
u2fhid_msg((APDU *)reader->buf, reader->len);
break;
case U2FHID_WINK:
u2fhid_wink(reader->buf, reader->len);
break;
default:
send_u2fhid_error(cid, ERR_INVALID_CMD);
break;
}
// wait for next commmand/ button press
reader->cmd = 0;
reader->seq = 255;
while (dialog_timeout > 0 && reader->cmd == 0) {
dialog_timeout--;
usbPoll(); // may trigger new request
//buttonUpdate();
if (keepkey_button_down() &&
(last_req_state == AUTH || last_req_state == REG)) {
last_req_state++;
// standard requires to remember button press for 10 seconds.
dialog_timeout = 10 * U2F_TIMEOUT;
}
}
if (reader->cmd == 0) {
last_req_state = INIT;
cid = 0;
reader = 0;
usbTiny(0);
layoutHome();
return;
}
}
}