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proxmark3/client/src/cmdlfnoralsy.c
iceman1001 ae853ede79 reader - textual
2020-12-01 11:26:54 +01:00

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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 Noralsy tag commands
// ASK/Manchester, STT, RF/32, 96 bits long (some bits unknown)
//-----------------------------------------------------------------------------
#include "cmdlfnoralsy.h"
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "commonutil.h" // ARRAYLEN
#include "cmdparser.h" // command_t
#include "comms.h"
#include "ui.h"
#include "cmddata.h"
#include "cmdlf.h"
#include "protocols.h" // for T55xx config register definitions
#include "lfdemod.h" // parityTest
#include "cmdlft55xx.h" // verifywrite
#include "cmdlfem4x05.h" //
#include "cliparser.h"
static int CmdHelp(const char *Cmd);
static uint8_t noralsy_chksum(uint8_t *bits, uint8_t len) {
uint8_t sum = 0;
for (uint8_t i = 0; i < len; i += 4)
sum ^= bytebits_to_byte(bits + i, 4);
return sum & 0x0F ;
}
//see ASKDemod for what args are accepted
int demodNoralsy(bool verbose) {
(void) verbose; // unused so far
//ASK / Manchester
bool st = true;
if (ASKDemod_ext(32, 0, 0, 0, false, false, false, 1, &st) != PM3_SUCCESS) {
if (g_debugMode) PrintAndLogEx(DEBUG, "DEBUG: Error - Noralsy: ASK/Manchester Demod failed");
return PM3_ESOFT;
}
if (!st) {
if (g_debugMode) PrintAndLogEx(DEBUG, "DEBUG: Error - Noralsy: sequence terminator not found");
return PM3_ESOFT;
}
size_t size = DemodBufferLen;
int ans = detectNoralsy(DemodBuffer, &size);
if (ans < 0) {
if (g_debugMode) {
if (ans == -1)
PrintAndLogEx(DEBUG, "DEBUG: Error - Noralsy: too few bits found");
else if (ans == -2)
PrintAndLogEx(DEBUG, "DEBUG: Error - Noralsy: preamble not found");
else if (ans == -3)
PrintAndLogEx(DEBUG, "DEBUG: Error - Noralsy: Size not correct: %zu", size);
else
PrintAndLogEx(DEBUG, "DEBUG: Error - Noralsy: ans: %d", ans);
}
return PM3_ESOFT;
}
setDemodBuff(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);
uint32_t cardid = ((raw2 & 0xFFF00000) >> 20) << 16;
cardid |= (raw2 & 0xFF) << 8;
cardid |= ((raw3 & 0xFF000000) >> 24);
cardid = BCD2DEC(cardid);
uint16_t year = (raw2 & 0x000ff000) >> 12;
year = BCD2DEC(year);
year += (year > 60) ? 1900 : 2000;
// calc checksums
uint8_t calc1 = noralsy_chksum(DemodBuffer + 32, 40);
uint8_t calc2 = noralsy_chksum(DemodBuffer, 76);
uint8_t chk1 = 0, chk2 = 0;
chk1 = bytebits_to_byte(DemodBuffer + 72, 4);
chk2 = bytebits_to_byte(DemodBuffer + 76, 4);
// test checksums
if (chk1 != calc1) {
if (g_debugMode) PrintAndLogEx(DEBUG, "DEBUG: Error - Noralsy: checksum 1 failed %x - %x\n", chk1, calc1);
return PM3_ESOFT;
}
if (chk2 != calc2) {
if (g_debugMode) PrintAndLogEx(DEBUG, "DEBUG: Error - Noralsy: checksum 2 failed %x - %x\n", chk2, calc2);
return PM3_ESOFT;
}
PrintAndLogEx(SUCCESS, "Noralsy - Card: " _GREEN_("%u")", Year: " _GREEN_("%u") ", Raw: %08X%08X%08X", cardid, year, raw1, raw2, raw3);
if (raw1 != 0xBB0214FF) {
PrintAndLogEx(WARNING, "Unknown bits set in first block! Expected 0xBB0214FF, Found: 0x%08X", raw1);
PrintAndLogEx(WARNING, "Please post this output in forum to further research on this format");
}
return PM3_SUCCESS;
}
static int CmdNoralsyDemod(const char *Cmd) {
CLIParserContext *ctx;
CLIParserInit(&ctx, "lf noralsy demod",
"Try to find Noralsy preamble, if found decode / descramble data",
"lf noralsy demod"
);
void *argtable[] = {
arg_param_begin,
arg_param_end
};
CLIExecWithReturn(ctx, Cmd, argtable, true);
CLIParserFree(ctx);
return demodNoralsy(true);
}
static int CmdNoralsyReader(const char *Cmd) {
CLIParserContext *ctx;
CLIParserInit(&ctx, "lf noralsy reader",
"read a Noralsy tag",
"lf noralsy 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, 8000);
demodNoralsy(!cm);
} while (cm && !kbd_enter_pressed());
return PM3_SUCCESS;
}
static int CmdNoralsyClone(const char *Cmd) {
CLIParserContext *ctx;
CLIParserInit(&ctx, "lf noralsy clone",
"clone a Noralsy tag to a T55x7, Q5/T5555 or EM4305/4469 tag.",
"lf noralsy clone --cn 112233\n"
"lf noralsy clone --cn 112233 --q5 -> encode for Q5/T5555 tag\n"
"lf noralsy clone --cn 112233 --em -> encode for EM4305/4469"
);
void *argtable[] = {
arg_param_begin,
arg_u64_1(NULL, "cn", "<dec>", "Noralsy card ID"),
arg_u64_0("y", "year", "<dec>", "tag allocation year"),
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);
uint32_t id = arg_get_u32_def(ctx, 1, 0);
uint16_t year = arg_get_u32_def(ctx, 2, 2000);
bool q5 = arg_get_lit(ctx, 3);
bool em = arg_get_lit(ctx, 4);
CLIParserFree(ctx);
if (q5 && em) {
PrintAndLogEx(FAILED, "Can't specify both Q5 and EM4305 at the same time");
return PM3_EINVARG;
}
uint32_t blocks[4] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | T55x7_ST_TERMINATOR | 3 << T55x7_MAXBLOCK_SHIFT, 0, 0};
char cardtype[16] = {"T55x7"};
//Q5
if (q5) {
blocks[0] = T5555_FIXED | T5555_MODULATION_MANCHESTER | T5555_SET_BITRATE(32) | T5555_ST_TERMINATOR | 3 << T5555_MAXBLOCK_SHIFT;
snprintf(cardtype, sizeof(cardtype), "Q5/T5555");
}
// EM4305
if (em) {
blocks[0] = EM4305_NORALSY_CONFIG_BLOCK;
snprintf(cardtype, sizeof(cardtype), "EM4305/4469");
}
uint8_t *bits = calloc(96, sizeof(uint8_t));
if (getnoralsyBits(id, year, bits) != PM3_SUCCESS) {
PrintAndLogEx(ERR, "Error with tag bitstream generation.");
free(bits);
return PM3_ESOFT;
}
blocks[1] = bytebits_to_byte(bits, 32);
blocks[2] = bytebits_to_byte(bits + 32, 32);
blocks[3] = bytebits_to_byte(bits + 64, 32);
free(bits);
PrintAndLogEx(INFO, "Preparing to clone Noralsy to " _YELLOW_("%s") " with Card id: " _GREEN_("%u"), cardtype, id);
print_blocks(blocks, ARRAYLEN(blocks));
int res;
if (em) {
res = em4x05_clone_tag(blocks, ARRAYLEN(blocks), 0, false);
} else {
res = clone_t55xx_tag(blocks, ARRAYLEN(blocks));
}
PrintAndLogEx(SUCCESS, "Done");
PrintAndLogEx(HINT, "Hint: try " _YELLOW_("`lf noralsy reader`") " to verify");
return res;
}
static int CmdNoralsySim(const char *Cmd) {
CLIParserContext *ctx;
CLIParserInit(&ctx, "lf noralsy sim",
"Enables simulation of Noralsy card with specified card number.\n"
"Simulation runs until the button is pressed or another USB command is issued.\n",
"lf noralsy sim --cn 1337\n"
"lf noralsy sim --cn 1337 --year 2010"
);
void *argtable[] = {
arg_param_begin,
arg_u64_1(NULL, "cn", "<dec>", "Noralsy card ID"),
arg_u64_0("y", "year", "<dec>", "tag allocation year"),
arg_param_end
};
CLIExecWithReturn(ctx, Cmd, argtable, false);
uint32_t id = arg_get_u32_def(ctx, 1, 0);
uint16_t year = arg_get_u32_def(ctx, 2, 2000);
CLIParserFree(ctx);
uint8_t bs[96];
memset(bs, 0, sizeof(bs));
if (getnoralsyBits(id, year, bs) != PM3_SUCCESS) {
PrintAndLogEx(ERR, "Error with tag bitstream generation.");
return PM3_ESOFT;
}
PrintAndLogEx(SUCCESS, "Simulating Noralsy - CardId: " _YELLOW_("%u") " year " _YELLOW_("%u"), id, year);
lf_asksim_t *payload = calloc(1, sizeof(lf_asksim_t) + sizeof(bs));
payload->encoding = 1;
payload->invert = 0;
payload->separator = 1;
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", CmdNoralsyDemod, AlwaysAvailable, "Demodulate an Noralsy tag from the GraphBuffer"},
{"reader", CmdNoralsyReader, IfPm3Lf, "Attempt to read and extract tag data from the antenna"},
{"clone", CmdNoralsyClone, IfPm3Lf, "clone Noralsy tag to T55x7 or Q5/T5555"},
{"sim", CmdNoralsySim, IfPm3Lf, "simulate Noralsy 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 CmdLFNoralsy(const char *Cmd) {
clearCommandBuffer();
return CmdsParse(CommandTable, Cmd);
}
int getnoralsyBits(uint32_t id, uint16_t year, uint8_t *bits) {
//preamp
num_to_bytebits(0xBB0214FF, 32, bits); // --> Have seen 0xBB0214FF / 0xBB0314FF UNKNOWN
//convert ID into BCD-format
id = DEC2BCD(id);
year = DEC2BCD(year);
year &= 0xFF;
uint16_t sub1 = (id & 0xFFF0000) >> 16;
uint8_t sub2 = (id & 0x000FF00) >> 8;
uint8_t sub3 = (id & 0x00000FF);
num_to_bytebits(sub1, 12, bits + 32);
num_to_bytebits(year, 8, bits + 44);
num_to_bytebits(0, 4, bits + 52); // --> UNKNOWN. Flag?
num_to_bytebits(sub2, 8, bits + 56);
num_to_bytebits(sub3, 8, bits + 64);
//chksum byte
uint8_t chksum = noralsy_chksum(bits + 32, 40);
num_to_bytebits(chksum, 4, bits + 72);
chksum = noralsy_chksum(bits, 76);
num_to_bytebits(chksum, 4, bits + 76);
return PM3_SUCCESS;
}
// find Noralsy preamble in already demoded data
int detectNoralsy(uint8_t *dest, size_t *size) {
if (*size < 96) return -1; //make sure buffer has data
size_t startIdx = 0;
uint8_t preamble[] = {1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 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;
}
/*
*
* 2520116 | BB0214FF2529900116360000 | 10111011 00000011 00010100 11111111 00100101 00101001 10010000 00000001 00010110 00110110 00000000 00000000
* aaa*aaaaiiiYY*iiiicc---- **** iiiiiiii iiiiYYYY YYYY**** iiiiiiii iiiiiiii cccccccc
*
* a = fixed value BB0*14FF
* i = printed id, BCD-format
* Y = year
* c = checksum
* * = unknown
*
**/
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