mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-12 04:26:41 +08:00
316 lines
10 KiB
C
316 lines
10 KiB
C
//-----------------------------------------------------------------------------
|
|
// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// See LICENSE.txt for the text of the license.
|
|
//-----------------------------------------------------------------------------
|
|
// Low frequency Viking tag commands (AKA FDI Matalec Transit)
|
|
// ASK/Manchester, RF/32, 64 bits (complete)
|
|
//-----------------------------------------------------------------------------
|
|
#include "cmdlfviking.h"
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
#include "common.h"
|
|
#include "cmdparser.h" // command_t
|
|
#include "comms.h"
|
|
#include "ui.h"
|
|
#include "cmddata.h"
|
|
#include "cmdlf.h"
|
|
#include "lfdemod.h"
|
|
#include "commonutil.h" // num_to_bytes
|
|
#include "cliparser.h"
|
|
|
|
static int CmdHelp(const char *Cmd);
|
|
|
|
//see ASKDemod for what args are accepted
|
|
int demodViking(bool verbose) {
|
|
(void) verbose; // unused so far
|
|
|
|
bool st = false;
|
|
if (ASKDemod_ext(0, 0, 100, 0, false, false, false, 1, &st) != PM3_SUCCESS) {
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Viking ASKDemod failed");
|
|
return PM3_ESOFT;
|
|
}
|
|
|
|
size_t size = g_DemodBufferLen;
|
|
int ans = detectViking(g_DemodBuffer, &size);
|
|
if (ans < 0) {
|
|
PrintAndLogEx(DEBUG, "DEBUG: Error - Viking Demod %d %s", ans, (ans == -5) ? _RED_("[chksum error]") : "");
|
|
return PM3_ESOFT;
|
|
}
|
|
|
|
//got a good demod
|
|
uint32_t raw1 = bytebits_to_byte(g_DemodBuffer + ans, 32);
|
|
uint32_t raw2 = bytebits_to_byte(g_DemodBuffer + ans + 32, 32);
|
|
uint32_t cardid = bytebits_to_byte(g_DemodBuffer + ans + 24, 32);
|
|
uint8_t checksum = bytebits_to_byte(g_DemodBuffer + ans + 32 + 24, 8);
|
|
PrintAndLogEx(SUCCESS, "Viking - Card " _GREEN_("%08X") ", Raw: %08X%08X", cardid, raw1, raw2);
|
|
PrintAndLogEx(DEBUG, "Checksum: %02X", checksum);
|
|
setDemodBuff(g_DemodBuffer, 64, ans);
|
|
setClockGrid(g_DemodClock, g_DemodStartIdx + (ans * g_DemodClock));
|
|
return PM3_SUCCESS;
|
|
}
|
|
|
|
static int CmdVikingDemod(const char *Cmd) {
|
|
CLIParserContext *ctx;
|
|
CLIParserInit(&ctx, "lf viking demod",
|
|
"Try to find Viking AM preamble, if found decode / descramble data",
|
|
"lf viking demod"
|
|
);
|
|
|
|
void *argtable[] = {
|
|
arg_param_begin,
|
|
arg_param_end
|
|
};
|
|
CLIExecWithReturn(ctx, Cmd, argtable, true);
|
|
CLIParserFree(ctx);
|
|
return demodViking(true);
|
|
}
|
|
|
|
//see ASKDemod for what args are accepted
|
|
static int CmdVikingReader(const char *Cmd) {
|
|
|
|
CLIParserContext *ctx;
|
|
CLIParserInit(&ctx, "lf viking reader",
|
|
"read a Viking AM tag",
|
|
"lf viking reader -@ -> continuous reader mode"
|
|
);
|
|
|
|
void *argtable[] = {
|
|
arg_param_begin,
|
|
arg_lit0("@", NULL, "optional - continuous reader mode"),
|
|
arg_param_end
|
|
};
|
|
CLIExecWithReturn(ctx, Cmd, argtable, true);
|
|
bool cm = arg_get_lit(ctx, 1);
|
|
CLIParserFree(ctx);
|
|
|
|
if (cm) {
|
|
PrintAndLogEx(INFO, "Press " _GREEN_("<Enter>") " to exit");
|
|
}
|
|
|
|
do {
|
|
lf_read(false, 10000);
|
|
demodViking(true);
|
|
} while (cm && !kbd_enter_pressed());
|
|
|
|
return PM3_SUCCESS;
|
|
}
|
|
|
|
static int CmdVikingClone(const char *Cmd) {
|
|
|
|
CLIParserContext *ctx;
|
|
CLIParserInit(&ctx, "lf viking clone",
|
|
"clone a Viking AM tag to a T55x7, Q5/T5555 or EM4305/4469 tag.",
|
|
"lf viking clone --cn 01A337 -> encode for T55x7 tag\n"
|
|
"lf viking clone --cn 01A337 --q5 -> encode for Q5/T5555 tag\n"
|
|
"lf viking clone --cn 112233 --em -> encode for EM4305/4469"
|
|
);
|
|
|
|
void *argtable[] = {
|
|
arg_param_begin,
|
|
arg_str1(NULL, "cn", "<hex>", "8 digit hex viking card number"),
|
|
arg_lit0(NULL, "q5", "optional - specify writing to Q5/T5555 tag"),
|
|
arg_lit0(NULL, "em", "optional - specify writing to EM4305/4469 tag"),
|
|
arg_param_end
|
|
};
|
|
CLIExecWithReturn(ctx, Cmd, argtable, false);
|
|
|
|
int raw_len = 0;
|
|
uint8_t raw[4] = {0};
|
|
CLIGetHexWithReturn(ctx, 1, raw, &raw_len);
|
|
bool q5 = arg_get_lit(ctx, 2);
|
|
bool em = arg_get_lit(ctx, 3);
|
|
CLIParserFree(ctx);
|
|
|
|
uint32_t id = bytes_to_num(raw, raw_len);
|
|
if (id == 0) {
|
|
PrintAndLogEx(ERR, "Cardnumber can't be zero");
|
|
return PM3_EINVARG;
|
|
}
|
|
|
|
if (q5 && em) {
|
|
PrintAndLogEx(FAILED, "Can't specify both Q5 and EM4305 at the same time");
|
|
return PM3_EINVARG;
|
|
}
|
|
|
|
uint64_t rawID = getVikingBits(id);
|
|
|
|
struct p {
|
|
bool Q5;
|
|
bool EM;
|
|
uint8_t blocks[8];
|
|
} PACKED payload;
|
|
payload.Q5 = q5;
|
|
payload.EM = em;
|
|
|
|
num_to_bytes(rawID, 8, &payload.blocks[0]);
|
|
|
|
char cardtype[16] = {"T55x7"};
|
|
if (q5)
|
|
snprintf(cardtype, sizeof(cardtype), "Q5/T5555");
|
|
else if (em)
|
|
snprintf(cardtype, sizeof(cardtype), "EM4305/4469");
|
|
|
|
PrintAndLogEx(INFO, "Preparing to clone Viking tag on " _YELLOW_("%s") " - ID " _YELLOW_("%08X")" raw " _YELLOW_("%s")
|
|
, cardtype
|
|
, id
|
|
, sprint_hex(payload.blocks, sizeof(payload.blocks))
|
|
);
|
|
|
|
clearCommandBuffer();
|
|
|
|
SendCommandNG(CMD_LF_VIKING_CLONE, (uint8_t *)&payload, sizeof(payload));
|
|
PacketResponseNG resp;
|
|
if (!WaitForResponseTimeout(CMD_LF_VIKING_CLONE, &resp, T55XX_WRITE_TIMEOUT)) {
|
|
PrintAndLogEx(ERR, "Error occurred, device did not respond during write operation.");
|
|
return PM3_ETIMEOUT;
|
|
}
|
|
PrintAndLogEx(SUCCESS, "Done");
|
|
PrintAndLogEx(HINT, "Hint: try " _YELLOW_("`lf viking reader`") " to verify");
|
|
return resp.status;
|
|
}
|
|
|
|
static int CmdVikingSim(const char *Cmd) {
|
|
|
|
CLIParserContext *ctx;
|
|
CLIParserInit(&ctx, "lf viking sim",
|
|
"Enables simulation of viking card with specified card number.\n"
|
|
"Simulation runs until the button is pressed or another USB command is issued.\n"
|
|
"Per viking format, the card number is 8 digit hex number. Larger values are truncated.",
|
|
"lf viking sim --cn 01A337"
|
|
);
|
|
|
|
void *argtable[] = {
|
|
arg_param_begin,
|
|
arg_str1(NULL, "cn", "<hex>", "8 digit hex viking card number"),
|
|
arg_param_end
|
|
};
|
|
CLIExecWithReturn(ctx, Cmd, argtable, false);
|
|
|
|
int raw_len = 0;
|
|
uint8_t raw[4] = {0};
|
|
CLIGetHexWithReturn(ctx, 1, raw, &raw_len);
|
|
|
|
uint32_t id = bytes_to_num(raw, raw_len);
|
|
if (id == 0) {
|
|
PrintAndLogEx(ERR, "Cardnumber can't be zero");
|
|
CLIParserFree(ctx);
|
|
return PM3_EINVARG;
|
|
}
|
|
CLIParserFree(ctx);
|
|
|
|
uint64_t rawID = getVikingBits(id);
|
|
|
|
PrintAndLogEx(SUCCESS, "Simulating Viking - ID " _YELLOW_("%08X") " raw " _YELLOW_("%08X%08X"), id, (uint32_t)(rawID >> 32), (uint32_t)(rawID & 0xFFFFFFFF));
|
|
|
|
uint8_t bs[64];
|
|
num_to_bytebits(rawID, sizeof(bs), bs);
|
|
|
|
lf_asksim_t *payload = calloc(1, sizeof(lf_asksim_t) + sizeof(bs));
|
|
payload->encoding = 1;
|
|
payload->invert = 0;
|
|
payload->separator = 0;
|
|
payload->clock = 32;
|
|
memcpy(payload->data, bs, sizeof(bs));
|
|
|
|
clearCommandBuffer();
|
|
SendCommandNG(CMD_LF_ASK_SIMULATE, (uint8_t *)payload, sizeof(lf_asksim_t) + sizeof(bs));
|
|
free(payload);
|
|
|
|
PacketResponseNG resp;
|
|
WaitForResponse(CMD_LF_ASK_SIMULATE, &resp);
|
|
|
|
PrintAndLogEx(INFO, "Done");
|
|
if (resp.status != PM3_EOPABORTED)
|
|
return resp.status;
|
|
return PM3_SUCCESS;
|
|
}
|
|
|
|
static command_t CommandTable[] = {
|
|
{"help", CmdHelp, AlwaysAvailable, "This help"},
|
|
{"demod", CmdVikingDemod, AlwaysAvailable, "demodulate a Viking tag from the GraphBuffer"},
|
|
{"reader", CmdVikingReader, IfPm3Lf, "attempt to read and extract tag data"},
|
|
{"clone", CmdVikingClone, IfPm3Lf, "clone Viking tag to T55x7 or Q5/T5555"},
|
|
{"sim", CmdVikingSim, IfPm3Lf, "simulate Viking tag"},
|
|
{NULL, NULL, NULL, NULL}
|
|
};
|
|
|
|
static int CmdHelp(const char *Cmd) {
|
|
(void)Cmd; // Cmd is not used so far
|
|
CmdsHelp(CommandTable);
|
|
return PM3_SUCCESS;
|
|
}
|
|
|
|
int CmdLFViking(const char *Cmd) {
|
|
clearCommandBuffer();
|
|
return CmdsParse(CommandTable, Cmd);
|
|
}
|
|
|
|
// calc checksum
|
|
uint64_t getVikingBits(uint32_t id) {
|
|
uint8_t checksum = ((id >> 24) & 0xFF) ^ ((id >> 16) & 0xFF) ^ ((id >> 8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;
|
|
uint64_t ret = (uint64_t)0xF2 << 56;
|
|
ret |= (uint64_t)id << 8;
|
|
ret |= checksum;
|
|
return ret;
|
|
}
|
|
|
|
static bool isValidVikingChecksum(uint8_t *src) {
|
|
uint32_t checkCalc = bytebits_to_byte(src, 8) ^
|
|
bytebits_to_byte(src + 8, 8) ^
|
|
bytebits_to_byte(src + 16, 8) ^
|
|
bytebits_to_byte(src + 24, 8) ^
|
|
bytebits_to_byte(src + 32, 8) ^
|
|
bytebits_to_byte(src + 40, 8) ^
|
|
bytebits_to_byte(src + 48, 8) ^
|
|
bytebits_to_byte(src + 56, 8) ^
|
|
0xA8;
|
|
return checkCalc == 0;
|
|
}
|
|
|
|
// find viking preamble 0xF200 in already demoded data
|
|
int detectViking(uint8_t *src, size_t *size) {
|
|
//make sure buffer has data
|
|
if (*size < 64) return -2;
|
|
size_t tsize = *size;
|
|
size_t startIdx = 0;
|
|
bool preamblefound = false;
|
|
uint8_t preamble[] = {1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
|
|
if (preambleSearch(src, preamble, sizeof(preamble), size, &startIdx)) {
|
|
preamblefound = true;
|
|
if (*size != 64) return -6;
|
|
if (isValidVikingChecksum(src + startIdx)) {
|
|
//return start position
|
|
return (int)startIdx;
|
|
}
|
|
}
|
|
// Invert bits and try again
|
|
*size = tsize;
|
|
for (uint32_t i = 0; i < *size; i++) src[i] ^= 1;
|
|
if (preambleSearch(src, preamble, sizeof(preamble), size, &startIdx)) {
|
|
preamblefound = true;
|
|
if (*size != 64) return -6;
|
|
if (isValidVikingChecksum(src + startIdx)) {
|
|
//return start position
|
|
return (int)startIdx;
|
|
}
|
|
}
|
|
// Restore buffer
|
|
*size = tsize;
|
|
for (uint32_t i = 0; i < *size; i++) src[i] ^= 1;
|
|
if (preamblefound)
|
|
return -5;
|
|
else
|
|
return -4;
|
|
}
|