// Indala 26 bit decode
// by marshmellow
// optional arguments - same as PSKDemod (clock & invert & maxerr)
int CmdIndalaDemod(const char *Cmd) {
int ans;
if (strlen(Cmd) > 0)
ans = PSKDemod(Cmd, 0);
else //default to RF/32
ans = PSKDemod("32", 0);
if (!ans){
PrintAndLogEx(DEBUG, "DEBUG: Error - Indala can't demod signal: %d",ans);
return 0;
}
uint8_t invert = 0;
size_t size = DemodBufferLen;
int idx = indala64decode(DemodBuffer, &size, &invert);
if (idx < 0 || size != 64) {
// try 224 indala
invert = 0;
size = DemodBufferLen;
idx = indala224decode(DemodBuffer, &size, &invert);
if (idx < 0 || size != 224) {
PrintAndLogEx(DEBUG, "DEBUG: Error - Indala wrong size, expected [64|224] got: %d (startindex %i)", size, idx);
return -1;
}
}
setDemodBuf(DemodBuffer, size, (size_t)idx);
setClockGrid(g_DemodClock, g_DemodStartIdx + (idx * g_DemodClock));
if (invert) {
PrintAndLogEx(DEBUG, "DEBUG: Error - Indala had to invert bits");
for (size_t i = 0; i < size; i++)
DemodBuffer[i] ^= 1;
}
//convert UID to HEX
uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
uid1 = bytebits_to_byte(DemodBuffer,32);
uid2 = bytebits_to_byte(DemodBuffer+32,32);
if (DemodBufferLen == 64){
PrintAndLogEx(SUCCESS, "Indala Found - bitlength %d, UID = (0x%x%08x)\n%s",
DemodBufferLen, uid1, uid2, sprint_bin_break(DemodBuffer,DemodBufferLen,32)
);
} else {
uid3 = bytebits_to_byte(DemodBuffer+64,32);
uid4 = bytebits_to_byte(DemodBuffer+96,32);
uid5 = bytebits_to_byte(DemodBuffer+128,32);
uid6 = bytebits_to_byte(DemodBuffer+160,32);
uid7 = bytebits_to_byte(DemodBuffer+192,32);
PrintAndLogEx(SUCCESS, "Indala Found - bitlength %d, UID = (0x%x%08x%08x%08x%08x%08x%08x)\n%s",
DemodBufferLen,
uid1, uid2, uid3, uid4, uid5, uid6, uid7, sprint_bin_break(DemodBuffer, DemodBufferLen, 32)
);
}
if (g_debugMode){
PrintAndLogEx(DEBUG, "DEBUG: Indala - printing demodbuffer:");
printDemodBuff();
}
return 1;
}
int CmdPSKNexWatch(const char *Cmd)
{
if (!PSKDemod("", false)) return 0;
uint8_t preamble[28] = {0,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
size_t startIdx = 0, size = DemodBufferLen;
bool invert = false;
if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
// if didn't find preamble try again inverting
if (!PSKDemod("1", false)) return 0;
size = DemodBufferLen;
if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
invert = true;
}
if (size != 128) return 0;
setDemodBuf(DemodBuffer, size, startIdx+4);
startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
//get ID
uint32_t ID = 0;
for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
for (uint8_t idx=0; idx<8; idx++){
ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
}
}
//parity check (TBD)
//checksum check (TBD)
//output
PrintAndLog("NexWatch ID: %d", ID);
if (invert){
PrintAndLog("Had to Invert - probably NexKey");
for (uint8_t idx=0; idx<size; idx++)
DemodBuffer[idx] ^= 1;
}
CmdPrintDemodBuff("x");
return 1;
}
