mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-15 14:20:51 +08:00
245 lines
7.3 KiB
C
245 lines
7.3 KiB
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 visa 2000 tag commands
|
|
// by iceman
|
|
// ASK/Manchester, RF/64, STT, 96 bits (complete)
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include "cmdlfvisa2000.h"
|
|
|
|
#define BL0CK1 0x56495332
|
|
|
|
static int CmdHelp(const char *Cmd);
|
|
|
|
int usage_lf_visa2k_clone(void){
|
|
PrintAndLogEx(NORMAL, "clone a Visa2000 tag to a T55x7 tag.");
|
|
PrintAndLogEx(NORMAL, "Usage: lf visa2000 clone [h] <card ID> <Q5>");
|
|
PrintAndLogEx(NORMAL, "Options:");
|
|
PrintAndLogEx(NORMAL, " h : This help");
|
|
PrintAndLogEx(NORMAL, " <card ID> : Visa2k card ID");
|
|
PrintAndLogEx(NORMAL, " <Q5> : specify write to Q5 (t5555 instead of t55x7)");
|
|
PrintAndLogEx(NORMAL, "");
|
|
PrintAndLogEx(NORMAL, "Examples:");
|
|
PrintAndLogEx(NORMAL, " lf visa2000 clone 112233");
|
|
return 0;
|
|
}
|
|
|
|
int usage_lf_visa2k_sim(void) {
|
|
PrintAndLogEx(NORMAL, "Enables simulation of visa2k card with specified card number.");
|
|
PrintAndLogEx(NORMAL, "Simulation runs until the button is pressed or another USB command is issued.");
|
|
PrintAndLogEx(NORMAL, "");
|
|
PrintAndLogEx(NORMAL, "Usage: lf visa2000 sim [h] <card ID>");
|
|
PrintAndLogEx(NORMAL, "Options:");
|
|
PrintAndLogEx(NORMAL, " h : This help");
|
|
PrintAndLogEx(NORMAL, " <card ID> : Visa2k card ID");
|
|
PrintAndLogEx(NORMAL, "");
|
|
PrintAndLogEx(NORMAL, "Examples:");
|
|
PrintAndLogEx(NORMAL, " lf visa2000 sim 112233");
|
|
return 0;
|
|
}
|
|
|
|
static uint8_t visa_chksum( uint32_t id ) {
|
|
uint8_t sum = 0;
|
|
for (uint8_t i = 0; i < 32; i += 4)
|
|
sum ^= (id >> i) & 0xF;
|
|
return sum & 0xF;
|
|
}
|
|
|
|
static uint8_t visa_parity( uint32_t id) {
|
|
// 4bit parity LUT
|
|
uint8_t par_lut[] = {
|
|
0,1,1,0
|
|
,1,0,0,1
|
|
,1,0,0,1
|
|
,0,1,1,0
|
|
};
|
|
uint8_t par = 0;
|
|
par |= par_lut[ (id >> 28) & 0xF ] << 7;
|
|
par |= par_lut[ (id >> 24) & 0xF ] << 6;
|
|
par |= par_lut[ (id >> 20) & 0xF ] << 5;
|
|
par |= par_lut[ (id >> 16) & 0xF ] << 4;
|
|
par |= par_lut[ (id >> 12) & 0xF ] << 3;
|
|
par |= par_lut[ (id >> 8) & 0xF ] << 2;
|
|
par |= par_lut[ (id >> 4) & 0xF ] << 1;
|
|
par |= par_lut[ (id & 0xF) ];
|
|
return par;
|
|
}
|
|
|
|
// by iceman
|
|
// find Visa2000 preamble in already demoded data
|
|
int detectVisa2k(uint8_t *dest, size_t *size) {
|
|
if (*size < 96) return -1; //make sure buffer has data
|
|
size_t startIdx = 0;
|
|
uint8_t preamble[] = {0,1,0,1,0,1,1,0,0,1,0,0,1,0,0,1,0,1,0,1,0,0,1,1,0,0,1,1,0,0,1,0};
|
|
if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx))
|
|
return -2; //preamble not found
|
|
if (*size != 96) return -3; //wrong demoded size
|
|
//return start position
|
|
return (int)startIdx;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* 56495332 00096ebd 00000077 —> tag id 618173
|
|
* aaaaaaaa iiiiiiii -----ppc
|
|
*
|
|
* a = fixed value ascii 'VIS2'
|
|
* i = card id
|
|
* p = even parity bit for each nibble in card id.
|
|
* c = checksum (xor of card id)
|
|
*
|
|
**/
|
|
//see ASKDemod for what args are accepted
|
|
int CmdVisa2kDemod(const char *Cmd) {
|
|
|
|
// save GraphBuffer - to restore it later
|
|
save_restoreGB(1);
|
|
|
|
//sCmdAskEdgeDetect("");
|
|
|
|
//ASK / Manchester
|
|
bool st = true;
|
|
if (!ASKDemod_ext("64 0 0", false, false, 1, &st)) {
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Visa2k: ASK/Manchester Demod failed");
|
|
save_restoreGB(0);
|
|
return 0;
|
|
}
|
|
size_t size = DemodBufferLen;
|
|
int ans = detectVisa2k(DemodBuffer, &size);
|
|
if (ans < 0){
|
|
if (ans == -1)
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Visa2k: too few bits found");
|
|
else if (ans == -2)
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Visa2k: preamble not found");
|
|
else if (ans == -3)
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Visa2k: Size not correct: %d", size);
|
|
else
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Visa2k: ans: %d", ans);
|
|
|
|
save_restoreGB(0);
|
|
return 0;
|
|
}
|
|
setDemodBuf(DemodBuffer, 96, ans);
|
|
setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));
|
|
|
|
//got a good demod
|
|
uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
|
|
uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
|
|
uint32_t raw3 = bytebits_to_byte(DemodBuffer+64, 32);
|
|
|
|
// chksum
|
|
uint8_t calc = visa_chksum(raw2);
|
|
uint8_t chk = raw3 & 0xF;
|
|
|
|
// test checksums
|
|
if ( chk != calc ) {
|
|
PrintAndLogEx(DEBUG, "DEBUG: error: Visa2000 checksum failed %x - %x\n", chk, calc);
|
|
save_restoreGB(0);
|
|
return 0;
|
|
}
|
|
// parity
|
|
uint8_t calc_par = visa_parity(raw2);
|
|
uint8_t chk_par = (raw3 & 0xFF0) >> 4;
|
|
if ( calc_par != chk_par) {
|
|
PrintAndLogEx(DEBUG, "DEBUG: error: Visa2000 parity failed %x - %x\n", chk_par, calc_par);
|
|
save_restoreGB(0);
|
|
return 0;
|
|
}
|
|
PrintAndLogEx(SUCCESS, "Visa2000 Tag Found: Card ID %u, Raw: %08X%08X%08X", raw2, raw1 ,raw2, raw3);
|
|
save_restoreGB(0);
|
|
return 1;
|
|
}
|
|
|
|
// 64*96*2=12288 samples just in case we just missed the first preamble we can still catch 2 of them
|
|
int CmdVisa2kRead(const char *Cmd) {
|
|
lf_read(true, 12500);
|
|
return CmdVisa2kDemod(Cmd);
|
|
}
|
|
|
|
int CmdVisa2kClone(const char *Cmd) {
|
|
|
|
uint64_t id = 0;
|
|
uint32_t blocks[4] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_64 | T55x7_ST_TERMINATOR | 3 << T55x7_MAXBLOCK_SHIFT, BL0CK1, 0};
|
|
|
|
char cmdp = param_getchar(Cmd, 0);
|
|
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_visa2k_clone();
|
|
|
|
id = param_get32ex(Cmd, 0, 0, 10);
|
|
|
|
//Q5
|
|
if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q')
|
|
blocks[0] = T5555_MODULATION_MANCHESTER | T5555_SET_BITRATE(64) | T5555_ST_TERMINATOR | 3 << T5555_MAXBLOCK_SHIFT;
|
|
|
|
blocks[2] = id;
|
|
blocks[3] = (visa_parity(id) << 4) | visa_chksum(id);
|
|
|
|
PrintAndLogEx(INFO, "Preparing to clone Visa2000 to T55x7 with CardId: %u", id);
|
|
print_blocks(blocks, 4);
|
|
|
|
UsbCommand resp;
|
|
UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
|
|
|
|
for (uint8_t i = 0; i < 4; i++) {
|
|
c.arg[0] = blocks[i];
|
|
c.arg[1] = i;
|
|
clearCommandBuffer();
|
|
SendCommand(&c);
|
|
if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
|
|
PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int CmdVisa2kSim(const char *Cmd) {
|
|
|
|
uint32_t id = 0;
|
|
char cmdp = param_getchar(Cmd, 0);
|
|
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_visa2k_sim();
|
|
|
|
id = param_get32ex(Cmd, 0, 0, 10);
|
|
|
|
uint8_t clk = 64, encoding = 1, separator = 1, invert = 0;
|
|
uint16_t arg1, arg2;
|
|
size_t size = 96;
|
|
arg1 = clk << 8 | encoding;
|
|
arg2 = invert << 8 | separator;
|
|
|
|
PrintAndLogEx(NORMAL, "Simulating Visa2000 - CardId: %u", id);
|
|
|
|
UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
|
|
|
|
uint32_t blocks[3] = { BL0CK1, id, (visa_parity(id) << 4) | visa_chksum(id) };
|
|
|
|
for(int i = 0; i < 3; ++i)
|
|
num_to_bytebits(blocks[i], 32, c.d.asBytes + i*32);
|
|
|
|
clearCommandBuffer();
|
|
SendCommand(&c);
|
|
return 0;
|
|
}
|
|
|
|
static command_t CommandTable[] = {
|
|
{"help", CmdHelp, 1, "This help"},
|
|
{"demod", CmdVisa2kDemod, 1, "demodulate an VISA2000 tag from the GraphBuffer"},
|
|
{"read", CmdVisa2kRead, 0, "attempt to read and extract tag data from the antenna"},
|
|
{"clone", CmdVisa2kClone, 0, "clone Visa2000 to t55x7"},
|
|
{"sim", CmdVisa2kSim, 0, "simulate Visa2000 tag"},
|
|
{NULL, NULL, 0, NULL}
|
|
};
|
|
|
|
int CmdLFVisa2k(const char *Cmd) {
|
|
clearCommandBuffer();
|
|
CmdsParse(CommandTable, Cmd);
|
|
return 0;
|
|
}
|
|
|
|
int CmdHelp(const char *Cmd) {
|
|
CmdsHelp(CommandTable);
|
|
return 0;
|
|
}
|