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proxmark3/client/cmdlfnedap.c

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//-----------------------------------------------------------------------------
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Low frequency NEDAP tag commands
//-----------------------------------------------------------------------------
#include <string.h>
#include <inttypes.h>
#include "cmdlfnedap.h"
static int CmdHelp(const char *Cmd);
int usage_lf_nedap_clone(void){
PrintAndLog("clone a NEDAP tag to a T55x7 tag.");
PrintAndLog("");
PrintAndLog("Usage: lf nedap clone [h] <Card-Number>");
PrintAndLog("Options:");
PrintAndLog(" h : This help");
PrintAndLog(" <Card Number> : 24-bit value card number");
// PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
PrintAndLog("");
PrintAndLog("Sample: lf nedap clone 112233");
return 0;
}
int usage_lf_nedap_sim(void) {
PrintAndLog("Enables simulation of NEDAP card with specified card number.");
PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
PrintAndLog("");
PrintAndLog("Usage: lf nedap sim [h] <Card-Number>");
PrintAndLog("Options:");
PrintAndLog(" h : This help");
PrintAndLog(" <Card Number> : 24-bit value card number");
PrintAndLog("");
PrintAndLog("Sample: lf nedap sim 112233");
return 0;
}
int GetNedapBits(uint32_t cn, uint8_t *nedapBits) {
uint8_t pre[128];
memset(pre, 0x00, sizeof(pre));
// preamble 1111 1111 10 = 0XF8
num_to_bytebits(0xF8, 10, pre);
// fixed tagtype code? 0010 1101 = 0x2D
num_to_bytebits(0x2D, 8, pre+10);
// 46 encrypted bits - UNKNOWN ALGO
// -- 16 bits checksum. Should be 4x4 checksum, based on UID and 2 constant values.
// -- 30 bits undocumented?
num_to_bytebits(cn, 46, pre+18);
//----from this part, the UID in clear text, with a 1bit ZERO as separator between bytes.
pre[64] = 0;
// cardnumber (uid)
num_to_bytebits(cn, 24, pre+64);
pre[73] = 0;
pre[82] = 0;
pre[91] = 0;
pre[100] = 0;
pre[109] = 0;
pre[118] = 0;
// add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
addParity(pre+64, pre+64, 128, 8, 1);
//1111111110001011010000010110100011001001000010110101001101011001000110011010010000000000100001110001001000000001000101011100111
return 1;
}
/*
- UID: 001630
- i: 4071
- Checksum2 BE21
*/
//GetParity( uint8_t *bits, uint8_t type, int length)
//NEDAP demod - ASK/Biphase (or Diphase), RF/64 with preamble of 1111111110 (always a 128 bit data stream)
//print NEDAP Prox ID, encoding, encrypted ID,
int CmdLFNedapDemod(const char *Cmd) {
//raw ask demod no start bit finding just get binary from wave
if (!ASKbiphaseDemod("0 64 0 0", false)) {
if (g_debugMode) PrintAndLog("DEBUG: Error - Nedap ASKbiphaseDemod failed");
return 0;
}
size_t size = DemodBufferLen;
int idx = NedapDemod(DemodBuffer, &size);
if (idx < 0){
if (g_debugMode){
// if (idx == -5)
// PrintAndLog("DEBUG: Error - not enough samples");
// else if (idx == -1)
// PrintAndLog("DEBUG: Error - only noise found");
// else if (idx == -2)
// PrintAndLog("DEBUG: Error - problem during ASK/Biphase demod");
if (idx == -3)
PrintAndLog("DEBUG: Error - Nedap Size not correct: %d", size);
else if (idx == -4)
PrintAndLog("DEBUG: Error - Nedap preamble not found");
else
PrintAndLog("DEBUG: Error - Nedap idx: %d",idx);
}
return 0;
}
/* Index map E E
preamble enc tag type encrypted uid P d 33 d 90 d 04 d 71 d 40 d 45 d E7 P
1111111110 00101101000001011010001100100100001011010100110101100 1 0 00110011 0 10010000 0 00000100 0 01110001 0 01000000 0 01000101 0 11100111 1
uid2 uid1 uid0 I I R R
1111111110 00101101000001011010001100100100001011010100110101100 1
0 00110011
0 10010000
0 00000100
0 01110001
0 01000000
0 01000101
0 11100111
1
Tag ID is 049033
I = Identical on all tags
R = Random ?
UID2, UID1, UID0 == card number
*/
//get raw ID before removing parities
uint32_t raw[4] = {0,0,0,0};
raw[0] = bytebits_to_byte(DemodBuffer+idx+96,32);
raw[1] = bytebits_to_byte(DemodBuffer+idx+64,32);
raw[2] = bytebits_to_byte(DemodBuffer+idx+32,32);
raw[3] = bytebits_to_byte(DemodBuffer+idx,32);
setDemodBuf(DemodBuffer,128,idx);
setGrid_Clock(64);
uint8_t firstParity = GetParity( DemodBuffer, EVEN, 63);
if ( firstParity != DemodBuffer[63] ) {
PrintAndLog("DEBUG: Error - Nedap 1st 64bit parity check failed: %d|%d ", DemodBuffer[63], firstParity);
return 0;
}
uint8_t secondParity = GetParity( DemodBuffer+64, EVEN, 63);
if ( secondParity != DemodBuffer[127] ) {
PrintAndLog("DEBUG: Error - Nedap 2st 64bit parity check failed: %d|%d ", DemodBuffer[127], secondParity);
return 0;
}
// ok valid card found!
uint32_t uid = 0;
uid = bytebits_to_byte(DemodBuffer+65, 8);
uid |= bytebits_to_byte(DemodBuffer+74, 8) << 8;
uid |= bytebits_to_byte(DemodBuffer+83, 8) << 16;
uint16_t two = 0;
two = bytebits_to_byte(DemodBuffer+92, 8);
two |= bytebits_to_byte(DemodBuffer+101, 8) << 8;
uint16_t chksum2 = 0;
chksum2 = bytebits_to_byte(DemodBuffer+110, 8);
chksum2 |= bytebits_to_byte(DemodBuffer+119, 8) << 8;
PrintAndLog("NEDAP ID Found - Raw: %08x%08x%08x%08x", raw[3], raw[2], raw[1], raw[0]);
PrintAndLog(" - UID: %06X", uid);
PrintAndLog(" - i: %04X", two);
PrintAndLog(" - Checksum2 %04X", chksum2);
if (g_debugMode){
PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
printDemodBuff();
PrintAndLog("BIN:\n%s", sprint_bin_break( DemodBuffer, 128, 64) );
}
return 1;
}
/*
configuration
lf t55xx wr b 0 d 00170082
1) uid 049033
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
2) uid 001630
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
3) uid 39feff
lf t55xx wr b 1 d ffbfa73e
lf t55xx wr b 2 d 4c0003ff
lf t55xx wr b 3 d ffbfa73e
lf t55xx wr b 4 d 4c0003ff
*/
int CmdLFNedapRead(const char *Cmd) {
CmdLFRead("s");
getSamples("12000", true);
return CmdLFNedapDemod("");
}
/*
int CmdLFNedapClone(const char *Cmd) {
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_nedap_clone();
uint32_t cardnumber=0, cn = 0;
uint32_t blocks[5];
uint8_t i;
uint8_t bs[128];
memset(bs, 0x00, sizeof(bs));
if (sscanf(Cmd, "%u", &cn ) != 1) return usage_lf_nedap_clone();
cardnumber = (cn & 0x00FFFFFF);
if ( !GetNedapBits(cardnumber, bs)) {
PrintAndLog("Error with tag bitstream generation.");
return 1;
}
((ASK/DIphase data rawdemod ab 0 64 1 0
//NEDAP - compat mode, ASK/DIphase, data rate 64, 4 data blocks
// DI-pahse (CDP) T55x7_MODULATION_DIPHASE
blocks[0] = T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_64 | 7 << T55x7_MAXBLOCK_SHIFT;
if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
//t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | ((64-2)>>1) << T5555_BITRATE_SHIFT | 7 <<T5555_MAXBLOCK_SHIFT;
blocks[1] = bytebits_to_byte(bs,32);
blocks[2] = bytebits_to_byte(bs+32,32);
blocks[3] = bytebits_to_byte(bs+64,32);
blocks[4] = bytebits_to_byte(bs+96,32);
PrintAndLog("Preparing to clone NEDAP to T55x7 with card number: %u", cardnumber);
PrintAndLog("Blk | Data ");
PrintAndLog("----+------------");
for ( i = 0; i<5; ++i )
PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);
UsbCommand resp;
UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
for ( i = 0; i<5; ++i ) {
c.arg[0] = blocks[i];
c.arg[1] = i;
clearCommandBuffer();
SendCommand(&c);
if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
PrintAndLog("Error occurred, device did not respond during write operation.");
return -1;
}
}
return 0;
}
*/
int CmdLFNedapSim(const char *Cmd) {
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_nedap_sim();
uint32_t cardnumber = 0, cn = 0;
uint8_t bs[128];
size_t size = sizeof(bs);
memset(bs, 0x00, size);
// NEDAP, Biphase = 2, clock 64, inverted, (DIPhase == inverted BIphase
uint8_t encoding = 2, separator = 0, clk=64, invert=1;
uint16_t arg1, arg2;
arg1 = clk << 8 | encoding;
arg2 = invert << 8 | separator;
if (sscanf(Cmd, "%u", &cn ) != 1) return usage_lf_nedap_sim();
cardnumber = (cn & 0x00FFFFFF);
if ( !GetNedapBits(cardnumber, bs)) {
PrintAndLog("Error with tag bitstream generation.");
return 1;
}
PrintAndLog("Simulating Nedap - CardNumber: %u", cardnumber );
UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
memcpy(c.d.asBytes, bs, size);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdLFNedapChk(const char *Cmd){
//301600714021BE
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 =len; i >= 0; --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: 0x%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"},
{"chk", CmdLFNedapChk, 1, "Calculate Nedap Checksum <uid bytes>"},
{NULL, NULL, 0, NULL}
};
int CmdLFNedap(const char *Cmd) {
clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}
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