mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2025-02-14 03:03:14 +08:00
333 lines
9.7 KiB
C
333 lines
9.7 KiB
C
//-----------------------------------------------------------------------------
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Low frequency NEDAP tag commands
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//-----------------------------------------------------------------------------
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#include <string.h>
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#include <inttypes.h>
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#include "cmdlfnedap.h"
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static int CmdHelp(const char *Cmd);
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int usage_lf_nedap_clone(void){
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PrintAndLog("clone a NEDAP tag to a T55x7 tag.");
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PrintAndLog("");
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PrintAndLog("Usage: lf nedap clone <Card-Number>");
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PrintAndLog("Options :");
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PrintAndLog(" <Card Number> : 24-bit value card number");
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// PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
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PrintAndLog("");
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PrintAndLog("Sample : lf nedap clone 112233");
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return 0;
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}
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int usage_lf_nedap_sim(void) {
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PrintAndLog("Enables simulation of NEDAP card with specified card number.");
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PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
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PrintAndLog("");
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PrintAndLog("Usage: lf nedap sim <Card-Number>");
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PrintAndLog("Options :");
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PrintAndLog(" <Card Number> : 24-bit value card number");
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PrintAndLog("");
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PrintAndLog("Sample : lf nedap sim 112233");
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return 0;
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}
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int GetNedapBits(uint32_t cn, uint8_t *nedapBits) {
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uint8_t pre[128];
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memset(pre, 0x00, sizeof(pre));
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// preamble 1111 1111 10 = 0XF8
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num_to_bytebits(0xF8, 10, pre);
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// fixed tagtype code? 0010 1101 = 0x2D
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num_to_bytebits(0x2D, 8, pre+10);
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// 46 encrypted bits - UNKNOWN ALGO
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// -- 16 bits checksum. Should be 4x4 checksum, based on UID and 2 constant values.
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// -- 30 bits undocumented?
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num_to_bytebits(cn, 46, pre+18);
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//----from this part, the UID in clear text, with a 1bit ZERO as separator between bytes.
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pre[64] = 0;
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// cardnumber
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num_to_bytebits(cn, 24, pre+64);
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pre[73] = 0;
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pre[82] = 0;
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pre[91] = 0;
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pre[100] = 0;
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pre[109] = 0;
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pre[118] = 0;
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// add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
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addParity(pre+64, pre+64, 128, 8, 1);
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//1111111110001011010000010110100011001001000010110101001101011001000110011010010000000000100001110001001000000001000101011100111
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return 1;
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}
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//GetParity( uint8_t *bits, uint8_t type, int length)
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//NEDAP demod - ASK/Biphase, RF/64 with preamble of 1111111110 (always a 128 bit data stream)
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//print NEDAP Prox ID, encoding, encrypted ID,
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int CmdLFNedapDemod(const char *Cmd) {
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//raw ask demod no start bit finding just get binary from wave
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uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
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size_t size = getFromGraphBuf(BitStream);
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if (size==0) return 0;
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//get binary from ask wave
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if (!ASKbiphaseDemod("0 64 0 0", FALSE)) {
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if (g_debugMode) PrintAndLog("Error NEDAP: ASKbiphaseDemod failed");
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return 0;
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}
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size = DemodBufferLen;
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int idx = NedapDemod(DemodBuffer, &size);
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if (idx < 0){
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if (g_debugMode){
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if (idx == -5)
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PrintAndLog("DEBUG: Error - not enough samples");
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else if (idx == -1)
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PrintAndLog("DEBUG: Error - only noise found");
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else if (idx == -2)
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PrintAndLog("DEBUG: Error - problem during ASK/Biphase demod");
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else if (idx == -3)
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PrintAndLog("DEBUG: Error - Size not correct: %d", size);
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else if (idx == -4)
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PrintAndLog("DEBUG: Error - NEDAP preamble not found");
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else
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PrintAndLog("DEBUG: Error - idx: %d",idx);
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}
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return 0;
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}
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/* Index map O
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preamble enc tag type encrypted uid P d 33 d 90 d 04 d 71 d 40 d 45 d E7 P
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1111111110 0010110100000101101000110010010000101101010011010110 0 1 0 00110011 0 10010000 0 00000100 0 01110001 0 01000000 0 01000101 0 11100111 1
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uid2 uid1 uid0 I I R R
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Tag ID is 049033
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I = Identical on all tags
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R = Random ?
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UID2, UID1, UID0 == card number
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*/
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//get raw ID before removing parities
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uint32_t rawLo = bytebits_to_byte(DemodBuffer+idx+96,32);
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uint32_t rawHi = bytebits_to_byte(DemodBuffer+idx+64,32);
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uint32_t rawHi2 = bytebits_to_byte(DemodBuffer+idx+32,32);
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uint32_t rawHi3 = bytebits_to_byte(DemodBuffer+idx,32);
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setDemodBuf(DemodBuffer,128,idx);
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// here 62 is length.
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uint8_t first63bit_parity = GetParity( DemodBuffer, ODD, 62);
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// Parity bits: 0-62 == 63
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// here 62 is pos in a zero based array
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if ( first63bit_parity != DemodBuffer[62] ) {
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PrintAndLog("1st half parity check failed: %d | %d ", DemodBuffer[62], first63bit_parity);
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return 0;
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}
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// uint8_t second63bit_parity = GetParity( DemodBuffer+64, ODD, 63);
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// if ( second63bit_parity != DemodBuffer[127] ) {
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// PrintAndLog("2st half parity check failed: %d | %d ", DemodBuffer[127], second63bit_parity);
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// return 0;
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// }
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// ok valid card found!
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uint32_t cardnum = bytebits_to_byte(DemodBuffer+81, 16);
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PrintAndLog("NEDAP ID Found - Card: %d - Raw: %08x%08x%08x%08x", cardnum, rawHi3, rawHi2, rawHi, rawLo);
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if (g_debugMode){
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PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
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printDemodBuff();
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}
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PrintAndLog("BIN: %s", sprint_bin_break( DemodBuffer, 64, 64) );
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return 1;
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}
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/*
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lf t55 wr b 1 d FF8B4168
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lf t55 wr b 2 d C90B5359
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lf t55 wr b 3 d 19A40087
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lf t55 wr b 4 d 120115CF
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0)
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lf t55 wr b 1 d FF8B6B20
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lf t55 wr b 2 d F19B84A3
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lf t55 wr b 3 d 18058007
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lf t55 wr b 4 d 1200857C
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*/
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int CmdLFNedapRead(const char *Cmd) {
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CmdLFRead("s");
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getSamples("30000",false);
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return CmdLFNedapDemod("");
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}
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/*
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int CmdLFNedapClone(const char *Cmd) {
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char cmdp = param_getchar(Cmd, 0);
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if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_nedap_clone();
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uint32_t cardnumber=0, cn = 0;
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uint32_t blocks[5];
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uint8_t i;
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uint8_t bs[128];
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memset(bs, 0x00, sizeof(bs));
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if (sscanf(Cmd, "%u", &cn ) != 1) return usage_lf_nedap_clone();
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cardnumber = (cn & 0x00FFFFFF);
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if ( !GetNedapBits(cardnumber, bs)) {
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PrintAndLog("Error with tag bitstream generation.");
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return 1;
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}
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((ASK/biphase data rawdemod ab 0 64 1 0
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//NEDAP - compat mode, ASK/Biphase, data rate 64, 4 data blocks
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blocks[0] = T55x7_MODULATION_BIPHASE | T55x7_BITRATE_RF_64 | 4<<T55x7_MAXBLOCK_SHIFT;
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if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
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//t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
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blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 64<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
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blocks[1] = bytebits_to_byte(bs,32);
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blocks[2] = bytebits_to_byte(bs+32,32);
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blocks[3] = bytebits_to_byte(bs+64,32);
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blocks[4] = bytebits_to_byte(bs+96,32);
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PrintAndLog("Preparing to clone NEDAP to T55x7 with card number: %u", cardnumber);
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PrintAndLog("Blk | Data ");
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PrintAndLog("----+------------");
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for ( i = 0; i<5; ++i )
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PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);
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UsbCommand resp;
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UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
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for ( i = 0; i<5; ++i ) {
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c.arg[0] = blocks[i];
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c.arg[1] = i;
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clearCommandBuffer();
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SendCommand(&c);
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if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
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PrintAndLog("Error occurred, device did not respond during write operation.");
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return -1;
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}
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}
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return 0;
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}
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*/
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int CmdLFNedapSim(const char *Cmd) {
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char cmdp = param_getchar(Cmd, 0);
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if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_nedap_sim();
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uint32_t cardnumber = 0, cn = 0;
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uint8_t bs[128];
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size_t size = sizeof(bs);
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memset(bs, 0x00, size);
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// NEDAP, Bihase = 2, clock 64, inverted,
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uint8_t encoding = 2, separator = 0, clk=64, invert=1;
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uint16_t arg1, arg2;
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arg1 = clk << 8 | encoding;
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arg2 = invert << 8 | separator;
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if (sscanf(Cmd, "%u", &cn ) != 2) return usage_lf_nedap_sim();
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cardnumber = (cn & 0x00FFFFFF);
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if ( !GetNedapBits(cardnumber, bs)) {
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PrintAndLog("Error with tag bitstream generation.");
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return 1;
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}
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PrintAndLog("Simulating Nedap - CardNumber: %u", cardnumber );
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UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
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memcpy(c.d.asBytes, bs, size);
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clearCommandBuffer();
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SendCommand(&c);
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return 0;
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}
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int CmdLFNedapChk(const char *Cmd){
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uint8_t data[256] = { 0x30, 0x16, 0x00, 0x71, 0x40, 0x21, 0xBE};
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int len = 0;
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param_gethex_ex(Cmd, 0, data, &len);
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len = ( len == 0 ) ? 5 : len>>1;
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PrintAndLog("Input: [%d] %s", len, sprint_hex(data, len));
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//uint8_t last = GetParity(data, EVEN, 62);
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//PrintAndLog("TEST PARITY:: %d | %d ", DemodBuffer[62], last);
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uint8_t cl = 0x1D, ch = 0x1D, carry = 0;
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uint8_t al, bl, temp;
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for (int i = 0; i < len; ++i){
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al = data[i];
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for (int j = 8; j > 0; --j) {
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bl = al ^ ch;
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//printf("BL %02x | CH %02x \n", al, ch);
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carry = (cl & 0x80) ? 1 : 0;
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cl <<= 1;
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temp = (ch & 0x80) ? 1 : 0;
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ch = (ch << 1) | carry;
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carry = temp;
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carry = (al & 0x80) ? 1 : 0;
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al <<= 1;
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carry = (bl & 0x80) ? 1 : 0;
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bl <<= 1;
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if (carry) {
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cl ^= 0x21;
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ch ^= 0x10;
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}
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}
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}
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PrintAndLog("Nedap checksum: [ 0x21, 0xBE ] %x", ((ch << 8) | cl) );
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return 0;
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}
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static command_t CommandTable[] = {
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{"help", CmdHelp, 1, "This help"},
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{"read", CmdLFNedapRead, 0, "Attempt to read and extract tag data"},
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// {"clone", CmdLFNedapClone,0, "<Card Number> clone nedap tag"},
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{"sim", CmdLFNedapSim, 0, "<Card Number> simulate nedap tag"},
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{"chk", CmdLFNedapChk, 1, "Calculate Nedap Checksum <uid bytes>"},
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{NULL, NULL, 0, NULL}
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};
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int CmdLFNedap(const char *Cmd) {
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clearCommandBuffer();
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CmdsParse(CommandTable, Cmd);
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return 0;
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}
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int CmdHelp(const char *Cmd) {
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CmdsHelp(CommandTable);
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return 0;
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}
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