[proxmark3-svn] / client / cmdlfnedap.c

//-----------------------------------------------------------------------------
//
// 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("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 - Size not correct: %d", size);
			else if (idx == -4)
				PrintAndLog("DEBUG: Error - NEDAP preamble not found");
			else
				PrintAndLog("DEBUG: Error - 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);

	uint8_t firstParity = GetParity( DemodBuffer, EVEN, 63);
	if ( firstParity != DemodBuffer[63]  ) {
		PrintAndLog("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("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("20000", 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/biphase   data rawdemod ab 0 64 1 0
	//NEDAP - compat mode, ASK/Biphase, data rate 64, 4 data blocks
	blocks[0] = T55x7_MODULATION_BIPHASE | T55x7_BITRATE_RF_64 | 4<<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<<T5555_BITRATE_SHIFT | 4<<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, 1000)){
			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,  Bihase = 2, clock 64, inverted, 
	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){
    
	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"},
	{"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;
}
Commit	Line	Data
56bbb25a	1	//-----------------------------------------------------------------------------
	2	//
	3	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	4	// at your option, any later version. See the LICENSE.txt file for the text of
	5	// the license.
	6	//-----------------------------------------------------------------------------
	7	// Low frequency NEDAP tag commands
	8	//-----------------------------------------------------------------------------
	9	#include <string.h>
	10	#include <inttypes.h>
	11	#include "cmdlfnedap.h"
	12	static int CmdHelp(const char *Cmd);
	13
	14	int usage_lf_nedap_clone(void){
	15	PrintAndLog("clone a NEDAP tag to a T55x7 tag.");
	16	PrintAndLog("");
8ae9b358	17	PrintAndLog("Usage: lf nedap clone [h] <Card-Number>");
	18	PrintAndLog("Options:");
	19	PrintAndLog(" h : This help");
	20	PrintAndLog(" <Card Number> : 24-bit value card number");
	21	// PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
56bbb25a	22	PrintAndLog("");
8ae9b358	23	PrintAndLog("Sample: lf nedap clone 112233");
56bbb25a	24	return 0;
	25	}
	26
	27	int usage_lf_nedap_sim(void) {
	28	PrintAndLog("Enables simulation of NEDAP card with specified card number.");
	29	PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
	30	PrintAndLog("");
8ae9b358	31	PrintAndLog("Usage: lf nedap sim [h] <Card-Number>");
	32	PrintAndLog("Options:");
	33	PrintAndLog(" h : This help");
	34	PrintAndLog(" <Card Number> : 24-bit value card number");
56bbb25a	35	PrintAndLog("");
8ae9b358	36	PrintAndLog("Sample: lf nedap sim 112233");
56bbb25a	37	return 0;
	38	}
	39
	40	int GetNedapBits(uint32_t cn, uint8_t *nedapBits) {
	41
	42	uint8_t pre[128];
	43	memset(pre, 0x00, sizeof(pre));
	44
	45	// preamble 1111 1111 10 = 0XF8
	46	num_to_bytebits(0xF8, 10, pre);
	47
	48	// fixed tagtype code? 0010 1101 = 0x2D
	49	num_to_bytebits(0x2D, 8, pre+10);
	50
	51	// 46 encrypted bits - UNKNOWN ALGO
	52	// -- 16 bits checksum. Should be 4x4 checksum, based on UID and 2 constant values.
	53	// -- 30 bits undocumented?
	54	num_to_bytebits(cn, 46, pre+18);
	55
	56	//----from this part, the UID in clear text, with a 1bit ZERO as separator between bytes.
	57	pre[64] = 0;
	58
2d1885f1	59	// cardnumber (uid)
56bbb25a	60	num_to_bytebits(cn, 24, pre+64);
	61
	62	pre[73] = 0;
	63	pre[82] = 0;
	64	pre[91] = 0;
	65	pre[100] = 0;
	66	pre[109] = 0;
	67	pre[118] = 0;
	68
	69	// add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
	70	addParity(pre+64, pre+64, 128, 8, 1);
c71f4da9	71
56bbb25a	72	//1111111110001011010000010110100011001001000010110101001101011001000110011010010000000000100001110001001000000001000101011100111
	73	return 1;
	74	}
2d1885f1	75	/*
	76	- UID: 001630
	77	- i: 4071
	78	- Checksum2 BE21
	79	*/
c71f4da9	80	//GetParity( uint8_t *bits, uint8_t type, int length)
c71f4da9	81
2d1885f1	82	//NEDAP demod - ASK/Biphase (or Diphase), RF/64 with preamble of 1111111110 (always a 128 bit data stream)
56bbb25a	83	//print NEDAP Prox ID, encoding, encrypted ID,
c71f4da9	84
c71f4da9	85	int CmdLFNedapDemod(const char *Cmd) {
56bbb25a	86	//raw ask demod no start bit finding just get binary from wave
c71f4da9	87	if (!ASKbiphaseDemod("0 64 0 0", FALSE)) {
96faed21	88	if (g_debugMode) PrintAndLog("Error NEDAP: ASKbiphaseDemod failed");
	89	return 0;
	90	}
6c283951	91	size_t size = DemodBufferLen;
c71f4da9	92	int idx = NedapDemod(DemodBuffer, &size);
56bbb25a	93	if (idx < 0){
56bbb25a	94	if (g_debugMode){
2d1885f1	95	// if (idx == -5)
	96	// PrintAndLog("DEBUG: Error - not enough samples");
	97	// else if (idx == -1)
	98	// PrintAndLog("DEBUG: Error - only noise found");
	99	// else if (idx == -2)
	100	// PrintAndLog("DEBUG: Error - problem during ASK/Biphase demod");
	101	if (idx == -3)
56bbb25a	102	PrintAndLog("DEBUG: Error - Size not correct: %d", size);
	103	else if (idx == -4)
	104	PrintAndLog("DEBUG: Error - NEDAP preamble not found");
	105	else
	106	PrintAndLog("DEBUG: Error - idx: %d",idx);
	107	}
	108	return 0;
	109	}
	110
2d1885f1	111	/* Index map E E
	112	preamble enc tag type encrypted uid P d 33 d 90 d 04 d 71 d 40 d 45 d E7 P
	113	1111111110 00101101000001011010001100100100001011010100110101100 1 0 00110011 0 10010000 0 00000100 0 01110001 0 01000000 0 01000101 0 11100111 1
532bcd71	114	uid2 uid1 uid0 I I R R
2d1885f1	115	1111111110 00101101000001011010001100100100001011010100110101100 1
	116
	117	0 00110011
	118	0 10010000
	119	0 00000100
	120	0 01110001
	121	0 01000000
	122	0 01000101
	123	0 11100111
	124	1
	125
56bbb25a	126	Tag ID is 049033
	127	I = Identical on all tags
	128	R = Random ?
	129	UID2, UID1, UID0 == card number
532bcd71	130
56bbb25a	131	*/
56bbb25a	132	//get raw ID before removing parities
2d1885f1	133	uint32_t raw[4] = {0,0,0,0};
	134	raw[0] = bytebits_to_byte(DemodBuffer+idx+96,32);
	135	raw[1] = bytebits_to_byte(DemodBuffer+idx+64,32);
	136	raw[2] = bytebits_to_byte(DemodBuffer+idx+32,32);
	137	raw[3] = bytebits_to_byte(DemodBuffer+idx,32);
c71f4da9	138	setDemodBuf(DemodBuffer,128,idx);
56bbb25a	139
2d1885f1	140	uint8_t firstParity = GetParity( DemodBuffer, EVEN, 63);
	141	if ( firstParity != DemodBuffer[63] ) {
	142	PrintAndLog("1st 64bit parity check failed: %d\|%d ", DemodBuffer[63], firstParity);
6c283951	143	return 0;
532bcd71	144	}
532bcd71	145
2d1885f1	146	uint8_t secondParity = GetParity( DemodBuffer+64, EVEN, 63);
	147	if ( secondParity != DemodBuffer[127] ) {
	148	PrintAndLog("2st 64bit parity check failed: %d\|%d ", DemodBuffer[127], secondParity);
6c283951	149	return 0;
2d1885f1	150	}
532bcd71	151
56bbb25a	152	// ok valid card found!
2d1885f1	153	uint32_t uid = 0;
	154	uid = bytebits_to_byte(DemodBuffer+65, 8);
	155	uid \|= bytebits_to_byte(DemodBuffer+74, 8) << 8;
	156	uid \|= bytebits_to_byte(DemodBuffer+83, 8) << 16;
	157
	158	uint16_t two = 0;
	159	two = bytebits_to_byte(DemodBuffer+92, 8);
	160	two \|= bytebits_to_byte(DemodBuffer+101, 8) << 8;
56bbb25a	161
2d1885f1	162	uint16_t chksum2 = 0;
	163	chksum2 = bytebits_to_byte(DemodBuffer+110, 8);
	164	chksum2 \|= bytebits_to_byte(DemodBuffer+119, 8) << 8;
	165
	166	PrintAndLog("NEDAP ID Found - Raw: %08x%08x%08x%08x", raw[3], raw[2], raw[1], raw[0]);
	167	PrintAndLog(" - UID: %06X", uid);
	168	PrintAndLog(" - i: %04X", two);
	169	PrintAndLog(" - Checksum2 %04X", chksum2);
	170
56bbb25a	171	if (g_debugMode){
	172	PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
	173	printDemodBuff();
2d1885f1	174	PrintAndLog("BIN:\n%s", sprint_bin_break( DemodBuffer, 128, 64) );
56bbb25a	175	}
c71f4da9	176
56bbb25a	177	return 1;
56bbb25a	178	}
c71f4da9	179	/*
2d1885f1	180	configuration
	181	lf t55xx wr b 0 d 00170082
	182
	183	1) uid 049033
c71f4da9	184	lf t55 wr b 1 d FF8B4168
	185	lf t55 wr b 2 d C90B5359
	186	lf t55 wr b 3 d 19A40087
	187	lf t55 wr b 4 d 120115CF
56bbb25a	188
2d1885f1	189	2) uid 001630
c71f4da9	190	lf t55 wr b 1 d FF8B6B20
	191	lf t55 wr b 2 d F19B84A3
	192	lf t55 wr b 3 d 18058007
	193	lf t55 wr b 4 d 1200857C
	194
2d1885f1	195	3) uid 39feff
	196	lf t55xx wr b 1 d ffbfa73e
	197	lf t55xx wr b 2 d 4c0003ff
	198	lf t55xx wr b 3 d ffbfa73e
	199	lf t55xx wr b 4 d 4c0003ff
	200
c71f4da9	201	*/
56bbb25a	202
	203	int CmdLFNedapRead(const char *Cmd) {
	204	CmdLFRead("s");
eb911aa8	205	getSamples("20000", TRUE);
c71f4da9	206	return CmdLFNedapDemod("");
56bbb25a	207	}
	208	/*
	209	int CmdLFNedapClone(const char *Cmd) {
	210
	211	char cmdp = param_getchar(Cmd, 0);
	212	if (strlen(Cmd) == 0 \|\| cmdp == 'h' \|\| cmdp == 'H') return usage_lf_nedap_clone();
	213
	214	uint32_t cardnumber=0, cn = 0;
	215	uint32_t blocks[5];
	216	uint8_t i;
	217	uint8_t bs[128];
	218	memset(bs, 0x00, sizeof(bs));
	219
	220	if (sscanf(Cmd, "%u", &cn ) != 1) return usage_lf_nedap_clone();
	221
	222	cardnumber = (cn & 0x00FFFFFF);
	223
	224	if ( !GetNedapBits(cardnumber, bs)) {
	225	PrintAndLog("Error with tag bitstream generation.");
	226	return 1;
	227	}
	228
	229	((ASK/biphase data rawdemod ab 0 64 1 0
	230	//NEDAP - compat mode, ASK/Biphase, data rate 64, 4 data blocks
	231	blocks[0] = T55x7_MODULATION_BIPHASE \| T55x7_BITRATE_RF_64 \| 4<<T55x7_MAXBLOCK_SHIFT;
	232
	233	if (param_getchar(Cmd, 3) == 'Q' \|\| param_getchar(Cmd, 3) == 'q')
890ae3dd	234	//t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
56bbb25a	235	blocks[0] = T5555_MODULATION_BIPHASE \| T5555_INVERT_OUTPUT \| 64<<T5555_BITRATE_SHIFT \| 4<<T5555_MAXBLOCK_SHIFT;
	236
	237	blocks[1] = bytebits_to_byte(bs,32);
	238	blocks[2] = bytebits_to_byte(bs+32,32);
	239	blocks[3] = bytebits_to_byte(bs+64,32);
	240	blocks[4] = bytebits_to_byte(bs+96,32);
	241
	242	PrintAndLog("Preparing to clone NEDAP to T55x7 with card number: %u", cardnumber);
	243	PrintAndLog("Blk \| Data ");
	244	PrintAndLog("----+------------");
	245	for ( i = 0; i<5; ++i )
	246	PrintAndLog(" %02d \| %08" PRIx32, i, blocks[i]);
	247
	248	UsbCommand resp;
	249	UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
	250
	251	for ( i = 0; i<5; ++i ) {
	252	c.arg[0] = blocks[i];
	253	c.arg[1] = i;
	254	clearCommandBuffer();
	255	SendCommand(&c);
	256	if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
	257	PrintAndLog("Error occurred, device did not respond during write operation.");
	258	return -1;
	259	}
	260	}
	261	return 0;
	262	}
	263	*/
	264
	265	int CmdLFNedapSim(const char *Cmd) {
	266
	267	char cmdp = param_getchar(Cmd, 0);
	268	if (strlen(Cmd) == 0 \|\| cmdp == 'h' \|\| cmdp == 'H') return usage_lf_nedap_sim();
	269
	270	uint32_t cardnumber = 0, cn = 0;
	271
	272	uint8_t bs[128];
	273	size_t size = sizeof(bs);
	274	memset(bs, 0x00, size);
	275
	276	// NEDAP, Bihase = 2, clock 64, inverted,
	277	uint8_t encoding = 2, separator = 0, clk=64, invert=1;
	278	uint16_t arg1, arg2;
	279	arg1 = clk << 8 \| encoding;
	280	arg2 = invert << 8 \| separator;
	281
8ae9b358	282	if (sscanf(Cmd, "%u", &cn ) != 1) return usage_lf_nedap_sim();
56bbb25a	283	cardnumber = (cn & 0x00FFFFFF);
	284
	285	if ( !GetNedapBits(cardnumber, bs)) {
	286	PrintAndLog("Error with tag bitstream generation.");
	287	return 1;
	288	}
	289
	290	PrintAndLog("Simulating Nedap - CardNumber: %u", cardnumber );
	291
	292	UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
	293	memcpy(c.d.asBytes, bs, size);
	294	clearCommandBuffer();
	295	SendCommand(&c);
	296	return 0;
	297	}
	298
c71f4da9	299	int CmdLFNedapChk(const char *Cmd){
c71f4da9	300
532bcd71	301	uint8_t data[256] = { 0x30, 0x16, 0x00, 0x71, 0x40, 0x21, 0xBE};
c71f4da9	302	int len = 0;
	303	param_gethex_ex(Cmd, 0, data, &len);
	304
	305	len = ( len == 0 ) ? 5 : len>>1;
	306
	307	PrintAndLog("Input: [%d] %s", len, sprint_hex(data, len));
	308
812513bf	309	//uint8_t last = GetParity(data, EVEN, 62);
812513bf	310	//PrintAndLog("TEST PARITY:: %d \| %d ", DemodBuffer[62], last);
532bcd71	311
c71f4da9	312	uint8_t cl = 0x1D, ch = 0x1D, carry = 0;
	313	uint8_t al, bl, temp;
	314
	315	for (int i = 0; i < len; ++i){
	316	al = data[i];
	317	for (int j = 8; j > 0; --j) {
	318
	319	bl = al ^ ch;
	320	//printf("BL %02x \| CH %02x \n", al, ch);
	321
	322	carry = (cl & 0x80) ? 1 : 0;
	323	cl <<= 1;
	324
	325	temp = (ch & 0x80) ? 1 : 0;
	326	ch = (ch << 1) \| carry;
	327	carry = temp;
	328
	329	carry = (al & 0x80) ? 1 : 0;
	330	al <<= 1;
	331
	332	carry = (bl & 0x80) ? 1 : 0;
	333	bl <<= 1;
	334
	335	if (carry) {
	336	cl ^= 0x21;
	337	ch ^= 0x10;
	338	}
	339	}
	340	}
	341
	342	PrintAndLog("Nedap checksum: [ 0x21, 0xBE ] %x", ((ch << 8) \| cl) );
	343	return 0;
	344	}
	345
	346
56bbb25a	347	static command_t CommandTable[] = {
56bbb25a	348	{"help", CmdHelp, 1, "This help"},
c71f4da9	349	{"read", CmdLFNedapRead, 0, "Attempt to read and extract tag data"},
	350	// {"clone", CmdLFNedapClone,0, "<Card Number> clone nedap tag"},
	351	{"sim", CmdLFNedapSim, 0, "<Card Number> simulate nedap tag"},
	352	{"chk", CmdLFNedapChk, 1, "Calculate Nedap Checksum <uid bytes>"},
56bbb25a	353	{NULL, NULL, 0, NULL}
	354	};
	355
	356	int CmdLFNedap(const char *Cmd) {
	357	clearCommandBuffer();
	358	CmdsParse(CommandTable, Cmd);
	359	return 0;
	360	}
	361
	362	int CmdHelp(const char *Cmd) {
	363	CmdsHelp(CommandTable);
	364	return 0;
	365	}