// add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
addParity(pre+64, pre+64, 128, 8, 1);
+
//1111111110001011010000010110100011001001000010110101001101011001000110011010010000000000100001110001001000000001000101011100111
return 1;
}
+//GetParity( uint8_t *bits, uint8_t type, int length)
+
//NEDAP demod - ASK/Biphase, RF/64 with preamble of 1111111110 (always a 128 bit data stream)
//print NEDAP Prox ID, encoding, encrypted ID,
-int CmdFSKdemodNedap(const char *Cmd) {
+
+int CmdLFNedapDemod(const char *Cmd) {
//raw ask demod no start bit finding just get binary from wave
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
size_t size = getFromGraphBuf(BitStream);
if (size==0) return 0;
//get binary from ask wave
- if (!ASKbiphaseDemod("0 64 1 0", FALSE)) {
+ if (!ASKbiphaseDemod("0 64 0 0", FALSE)) {
if (g_debugMode) PrintAndLog("Error NEDAP: ASKbiphaseDemod failed");
return 0;
}
-
size = DemodBufferLen;
-
- int idx = NedapDemod(BitStream, &size);
+ int idx = NedapDemod(DemodBuffer, &size);
if (idx < 0){
if (g_debugMode){
if (idx == -5)
return 0;
}
-/* Index map
-0 10 20 30 40 50 64
-| | | | | | |
- preamble enc tag type encrypted uid d 33 d 90 p 04 d 71 d 40 d 45 d E7 P
-1111111110 00101101000001011 0100011001001000010110101001101011001 0 00110011 0 10010000 0 00000100 0 01110001 0 01000000 0 01000101 0 11100111 1
- uid2 uid1 uid0 I I R R
+/* Index map O
+ preamble enc tag type encrypted uid P d 33 d 90 d 04 d 71 d 40 d 45 d E7 P
+1111111110 0010110100000101101000110010010000101101010011010110 0 1 0 00110011 0 10010000 0 00000100 0 01110001 0 01000000 0 01000101 0 11100111 1
+ uid2 uid1 uid0 I I R R
Tag ID is 049033
I = Identical on all tags
R = Random ?
UID2, UID1, UID0 == card number
-*/
+*/
//get raw ID before removing parities
- uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
- uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
- uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
- uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
- setDemodBuf(BitStream,128,idx);
+ uint32_t rawLo = bytebits_to_byte(DemodBuffer+idx+96,32);
+ uint32_t rawHi = bytebits_to_byte(DemodBuffer+idx+64,32);
+ uint32_t rawHi2 = bytebits_to_byte(DemodBuffer+idx+32,32);
+ uint32_t rawHi3 = bytebits_to_byte(DemodBuffer+idx,32);
+ setDemodBuf(DemodBuffer,128,idx);
+
+ // here 62 is length.
+ uint8_t first63bit_parity = GetParity( DemodBuffer, ODD, 62);
+ // Parity bits: 0-62 == 63
+ // here 62 is pos in a zero based array
+ if ( first63bit_parity != DemodBuffer[62] ) {
+ PrintAndLog("1st half parity check failed: %d | %d ", DemodBuffer[62], first63bit_parity);
+ return 0;
+ }
+
+ // uint8_t second63bit_parity = GetParity( DemodBuffer+64, ODD, 63);
+ // if ( second63bit_parity != DemodBuffer[127] ) {
+ // PrintAndLog("2st half parity check failed: %d | %d ", DemodBuffer[127], second63bit_parity);
+ // return 0;
+ // }
// ok valid card found!
- uint32_t cardnum = bytebits_to_byte(BitStream+81, 16);
+ uint32_t cardnum = bytebits_to_byte(DemodBuffer+81, 16);
PrintAndLog("NEDAP ID Found - Card: %d - Raw: %08x%08x%08x%08x", cardnum, rawHi3, rawHi2, rawHi, rawLo);
if (g_debugMode){
PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
printDemodBuff();
}
+ PrintAndLog("BIN: %s", sprint_bin_break( DemodBuffer, 64, 64) );
+
+
return 1;
}
+/*
+lf t55 wr b 1 d FF8B4168
+lf t55 wr b 2 d C90B5359
+lf t55 wr b 3 d 19A40087
+lf t55 wr b 4 d 120115CF
+0)
+lf t55 wr b 1 d FF8B6B20
+lf t55 wr b 2 d F19B84A3
+lf t55 wr b 3 d 18058007
+lf t55 wr b 4 d 1200857C
+
+*/
int CmdLFNedapRead(const char *Cmd) {
CmdLFRead("s");
getSamples("30000",false);
- return CmdFSKdemodNedap("");
+ return CmdLFNedapDemod("");
}
/*
int CmdLFNedapClone(const char *Cmd) {
return 0;
}
+
+
+int CmdLFNedapChk(const char *Cmd){
+
+ uint8_t data[256] = { 0x30, 0x16, 0x00, 0x71, 0x40, 0x21, 0xBE};
+ int len = 0;
+ param_gethex_ex(Cmd, 0, data, &len);
+
+ len = ( len == 0 ) ? 5 : len>>1;
+
+ PrintAndLog("Input: [%d] %s", len, sprint_hex(data, len));
+
+ //uint8_t last = GetParity(data, EVEN, 62);
+ //PrintAndLog("TEST PARITY:: %d | %d ", DemodBuffer[62], last);
+
+ uint8_t cl = 0x1D, ch = 0x1D, carry = 0;
+ uint8_t al, bl, temp;
+
+ for (int i = 0; i < len; ++i){
+ al = data[i];
+ for (int j = 8; j > 0; --j) {
+
+ bl = al ^ ch;
+ //printf("BL %02x | CH %02x \n", al, ch);
+
+ carry = (cl & 0x80) ? 1 : 0;
+ cl <<= 1;
+
+ temp = (ch & 0x80) ? 1 : 0;
+ ch = (ch << 1) | carry;
+ carry = temp;
+
+ carry = (al & 0x80) ? 1 : 0;
+ al <<= 1;
+
+ carry = (bl & 0x80) ? 1 : 0;
+ bl <<= 1;
+
+ if (carry) {
+ cl ^= 0x21;
+ ch ^= 0x10;
+ }
+ }
+ }
+
+ PrintAndLog("Nedap checksum: [ 0x21, 0xBE ] %x", ((ch << 8) | cl) );
+ return 0;
+}
+
+
static command_t CommandTable[] = {
{"help", CmdHelp, 1, "This help"},
- {"read", CmdLFNedapRead, 0, "Attempt to read and extract tag data"},
-// {"clone", CmdLFNedapClone, 0, "<Card Number> clone nedap tag"},
- {"sim", CmdLFNedapSim, 0, "<Card Number> simulate nedap tag"},
+ {"read", CmdLFNedapRead, 0, "Attempt to read and extract tag data"},
+// {"clone", CmdLFNedapClone,0, "<Card Number> clone nedap tag"},
+ {"sim", CmdLFNedapSim, 0, "<Card Number> simulate nedap tag"},
+ {"chk", CmdLFNedapChk, 1, "Calculate Nedap Checksum <uid bytes>"},
{NULL, NULL, 0, NULL}
};
projects / proxmark3-svn / blobdiff