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431 lines
16 KiB
C
431 lines
16 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 fdx-b tag commands
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// Differential Biphase, rf/32, 128 bits (known)
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//-----------------------------------------------------------------------------
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#include "cmdlffdx.h"
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#include <inttypes.h>
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#include <string.h>
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#include <stdlib.h>
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#include "cmdparser.h" // command_t
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#include "comms.h"
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#include "commonutil.h"
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#include "ui.h" // PrintAndLog
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#include "cmddata.h"
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#include "cmdlf.h" // lf read
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#include "crc16.h" // for checksum crc-16_ccitt
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#include "protocols.h" // for T55xx config register definitions
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#include "lfdemod.h" // parityTest
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#include "cmdlft55xx.h" // verifywrite
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/*
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FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
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8 databits + 1 parity (1)
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CIITT 16 checksum
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NATIONAL CODE, ICAR database
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COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
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FLAG (animal/non-animal)
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38 IDbits
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10 country code
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1 extra app bit
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14 reserved bits
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1 animal bit
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16 ccitt CRC chksum over 64bit ID CODE.
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24 appli bits.
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sample: 985121004515220 [ 37FF65B88EF94 ]
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*/
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static int CmdHelp(const char *Cmd);
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static int usage_lf_fdx_clone(void) {
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PrintAndLogEx(NORMAL, "Clone a FDX-B animal tag to a T55x7 tag.");
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PrintAndLogEx(NORMAL, "Usage: lf fdx clone [h] <country id> <animal id> <Q5>");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h : This help");
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PrintAndLogEx(NORMAL, " <country id> : Country id");
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PrintAndLogEx(NORMAL, " <animal id> : Animal id");
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// has extended data?
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//reserved/rfu
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//is animal tag
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// extended data
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PrintAndLogEx(NORMAL, " <Q5> : Specify write to Q5 (t5555 instead of t55x7)");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " lf fdx clone 999 112233");
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return PM3_SUCCESS;
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}
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static int usage_lf_fdx_sim(void) {
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PrintAndLogEx(NORMAL, "Enables simulation of FDX-B animal tag");
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PrintAndLogEx(NORMAL, "Simulation runs until the button is pressed or another USB command is issued.");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Usage: lf fdx sim [h] <country id> <animal id>");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h : This help");
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PrintAndLogEx(NORMAL, " <country id> : Country ID");
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PrintAndLogEx(NORMAL, " <animal id> : Animal ID");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " lf fdx sim 999 112233");
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return PM3_SUCCESS;
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}
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// clearing the topbit needed for the preambl detection.
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static void verify_values(uint32_t countryid, uint64_t animalid) {
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if ((animalid & 0x3FFFFFFFFF) != animalid) {
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animalid &= 0x3FFFFFFFFF;
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PrintAndLogEx(INFO, "Animal ID Truncated to 38bits: %"PRIx64, animalid);
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}
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if ((countryid & 0x3ff) != countryid) {
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countryid &= 0x3ff;
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PrintAndLogEx(INFO, "Country ID Truncated to 10bits: %03d", countryid);
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}
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}
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// FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
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// 8 databits + 1 parity (1)
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// CIITT 16 chksum
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// NATIONAL CODE, ICAR database
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// COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
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// FLAG (animal/non-animal)
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/*
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38 IDbits
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10 country code
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1 extra app bit
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14 reserved bits
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1 animal bit
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16 ccitt CRC chksum over 64bit ID CODE.
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24 appli bits.
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-- sample: 985121004515220 [ 37FF65B88EF94 ]
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*/
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/*
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static int CmdFDXBdemodBI(const char *Cmd) {
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(void)Cmd; // Cmd is not used so far
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int clk = 32;
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int invert = 1, errCnt = 0, offset = 0, maxErr = 100;
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uint8_t bs[MAX_DEMOD_BUF_LEN];
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size_t size = getFromGraphBuf(bs);
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errCnt = askdemod(bs, &size, &clk, &invert, maxErr, 0, 0);
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if (errCnt < 0 || errCnt > maxErr) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDXB no data or error found %d, clock: %d", errCnt, clk);
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return PM3_ESOFT;
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}
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errCnt = BiphaseRawDecode(bs, &size, &offset, 1);
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if (errCnt < 0 || errCnt > maxErr) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDXB BiphaseRawDecode: %d", errCnt);
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return PM3_ESOFT;
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}
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int preambleIndex = detectFDXB(bs, &size);
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if (preambleIndex < 0) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDXB preamble not found :: %d", preambleIndex);
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return PM3_ESOFT;
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}
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if (size != 128) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDXB incorrect data length found");
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return PM3_ESOFT;
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}
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setDemodBuff(bs, 128, preambleIndex);
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// remove marker bits (1's every 9th digit after preamble) (pType = 2)
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size = removeParity(bs, preambleIndex + 11, 9, 2, 117);
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if (size != 104) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDXB error removeParity:: %d", size);
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return PM3_ESOFT;
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}
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PrintAndLogEx(SUCCESS, "\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
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//got a good demod
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uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(bs + 32, 6)) << 32) | bytebits_to_byteLSBF(bs, 32);
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uint32_t countryCode = bytebits_to_byteLSBF(bs + 38, 10);
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uint8_t dataBlockBit = bs[48];
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uint32_t reservedCode = bytebits_to_byteLSBF(bs + 49, 14);
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uint8_t animalBit = bs[63];
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uint32_t crc_16 = bytebits_to_byteLSBF(bs + 64, 16);
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uint32_t extended = bytebits_to_byteLSBF(bs + 80, 24);
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uint64_t rawid = ((uint64_t)bytebits_to_byte(bs, 32) << 32) | bytebits_to_byte(bs + 32, 32);
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uint8_t raw[8];
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num_to_bytes(rawid, 8, raw);
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PrintAndLogEx(SUCCESS, "Raw ID Hex: %s", sprint_hex(raw, 8));
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uint16_t calcCrc = crc16_kermit(raw, 8);
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PrintAndLogEx(SUCCESS, "Animal ID: %04u-%012" PRIu64, countryCode, NationalCode);
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PrintAndLogEx(SUCCESS, "National Code: %012" PRIu64, NationalCode);
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PrintAndLogEx(SUCCESS, "CountryCode: %04u", countryCode);
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PrintAndLogEx(SUCCESS, "Reserved/RFU: %u", reservedCode);
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PrintAndLogEx(SUCCESS, "Animal Tag: %s", animalBit ? _YELLOW_("True") : "False");
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PrintAndLogEx(SUCCESS, "Has extended data: %s [0x%X]", dataBlockBit ? _YELLOW_("True") : "False", extended);
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PrintAndLogEx(SUCCESS, "CRC: 0x%04X - [%04X] - %s", crc_16, calcCrc, (calcCrc == crc_16) ? _GREEN_("Passed") : _RED_("Fail") );
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if (g_debugMode) {
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PrintAndLogEx(DEBUG, "Start marker %d; Size %d", preambleIndex, size);
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char *bin = sprint_bin_break(bs, size, 16);
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PrintAndLogEx(DEBUG, "DEBUG BinStream:\n%s", bin);
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}
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return PM3_SUCCESS;
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}
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*/
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//see ASKDemod for what args are accepted
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//almost the same demod as cmddata.c/CmdFDXBdemodBI
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static int CmdFdxDemod(const char *Cmd) {
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(void)Cmd; // Cmd is not used so far
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//Differential Biphase / di-phase (inverted biphase)
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//get binary from ask wave
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if (ASKbiphaseDemod("0 32 1 100", false) != PM3_SUCCESS) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDX-B ASKbiphaseDemod failed");
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return PM3_ESOFT;
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}
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size_t size = DemodBufferLen;
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int preambleIndex = detectFDXB(DemodBuffer, &size);
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if (preambleIndex < 0) {
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if (preambleIndex == -1)
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDX-B too few bits found");
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else if (preambleIndex == -2)
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDX-B preamble not found");
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else if (preambleIndex == -3)
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDX-B Size not correct: %d", size);
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else
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDX-B ans: %d", preambleIndex);
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return PM3_ESOFT;
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}
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// set and leave DemodBuffer intact
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setDemodBuff(DemodBuffer, 128, preambleIndex);
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setClockGrid(g_DemodClock, g_DemodStartIdx + (preambleIndex * g_DemodClock));
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// remove marker bits (1's every 9th digit after preamble) (pType = 2)
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size = removeParity(DemodBuffer, 11, 9, 2, 117);
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if (size != 104) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - FDX-B error removeParity: %d", size);
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return PM3_ESOFT;
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}
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//got a good demod
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uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(DemodBuffer + 32, 6)) << 32) | bytebits_to_byteLSBF(DemodBuffer, 32);
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uint16_t countryCode = bytebits_to_byteLSBF(DemodBuffer + 38, 10);
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uint8_t dataBlockBit = DemodBuffer[48];
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uint32_t reservedCode = bytebits_to_byteLSBF(DemodBuffer + 49, 14);
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uint8_t animalBit = DemodBuffer[63];
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uint32_t crc_16 = bytebits_to_byteLSBF(DemodBuffer + 64, 16);
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uint32_t extended = bytebits_to_byteLSBF(DemodBuffer + 80, 24);
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uint64_t rawid = (uint64_t)(bytebits_to_byte(DemodBuffer, 32)) << 32 | bytebits_to_byte(DemodBuffer + 32, 32);
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uint8_t raw[8];
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num_to_bytes(rawid, 8, raw);
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uint16_t calcCrc = crc16_kermit(raw, 8);
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PrintAndLogEx(SUCCESS, "\nFDX-B / ISO 11784/5 Animal Tag ID Found: Raw : %s", sprint_hex(raw, 8));
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PrintAndLogEx(SUCCESS, "Animal ID %04u-%012" PRIu64, countryCode, NationalCode);
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PrintAndLogEx(SUCCESS, "National Code %012" PRIu64 " (0x%" PRIx64 ")", NationalCode, NationalCode);
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PrintAndLogEx(SUCCESS, "Country Code %04u", countryCode);
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PrintAndLogEx(SUCCESS, "Reserved/RFU %u (0x04%X)", reservedCode, reservedCode);
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PrintAndLogEx(SUCCESS, "Animal Tag %s", animalBit ? _YELLOW_("True") : "False");
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PrintAndLogEx(SUCCESS, "Has extended data %s [0x%X]", dataBlockBit ? _YELLOW_("True") : "False", extended);
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PrintAndLogEx(SUCCESS, "CRC-16 0x%04X - 0x%04X [%s]", crc_16, calcCrc, (calcCrc == crc_16) ? _GREEN_("Ok") : _RED_("Fail"));
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if (g_debugMode) {
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PrintAndLogEx(DEBUG, "Start marker %d; Size %zu", preambleIndex, size);
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char *bin = sprint_bin_break(DemodBuffer, size, 16);
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PrintAndLogEx(DEBUG, "DEBUG bin stream:\n%s", bin);
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}
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// set block 0 for later
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//g_DemodConfig = T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT;
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return PM3_SUCCESS;
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}
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static int CmdFdxRead(const char *Cmd) {
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lf_read(true, 10000);
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return CmdFdxDemod(Cmd);
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}
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static int CmdFdxClone(const char *Cmd) {
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uint32_t countryid = 0;
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uint64_t animalid = 0;
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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_fdx_clone();
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countryid = param_get32ex(Cmd, 0, 0, 10);
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animalid = param_get64ex(Cmd, 1, 0, 10);
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verify_values(countryid, animalid);
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uint8_t *bits = calloc(128, sizeof(uint8_t));
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if (getFDXBits(animalid, countryid, 1, 0, 0, bits) != PM3_SUCCESS) {
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PrintAndLogEx(ERR, "Error with tag bitstream generation.");
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free(bits);
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return PM3_ESOFT;
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}
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uint32_t blocks[5] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0};
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//Q5
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if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q')
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blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | T5555_SET_BITRATE(32) | 4 << T5555_MAXBLOCK_SHIFT;
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// convert from bit stream to block data
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blocks[1] = bytebits_to_byte(bits, 32);
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blocks[2] = bytebits_to_byte(bits + 32, 32);
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blocks[3] = bytebits_to_byte(bits + 64, 32);
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blocks[4] = bytebits_to_byte(bits + 96, 32);
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free(bits);
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PrintAndLogEx(INFO, "Preparing to clone FDX-B to T55x7 with animal ID: %04u-%"PRIu64, countryid, animalid);
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print_blocks(blocks, ARRAYLEN(blocks));
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return clone_t55xx_tag(blocks, ARRAYLEN(blocks));
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}
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static int CmdFdxSim(const char *Cmd) {
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uint32_t countryid = 0;
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uint64_t animalid = 0;
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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_fdx_sim();
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countryid = param_get32ex(Cmd, 0, 0, 10);
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animalid = param_get64ex(Cmd, 1, 0, 10);
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verify_values(countryid, animalid);
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PrintAndLogEx(SUCCESS, "Simulating FDX-B animal ID: %04u-%"PRIu64, countryid, animalid);
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uint8_t bs[128];
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//getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits)
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getFDXBits(animalid, countryid, 1, 0, 0, bs);
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// 32, no STT, BIPHASE INVERTED == diphase
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lf_asksim_t *payload = calloc(1, sizeof(lf_asksim_t) + sizeof(bs));
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payload->encoding = 2;
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payload->invert = 1;
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payload->separator = 0;
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payload->clock = 32;
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memcpy(payload->data, bs, sizeof(bs));
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clearCommandBuffer();
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SendCommandNG(CMD_LF_ASK_SIMULATE, (uint8_t *)payload, sizeof(lf_asksim_t) + sizeof(bs));
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free(payload);
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PacketResponseNG resp;
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WaitForResponse(CMD_LF_ASK_SIMULATE, &resp);
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PrintAndLogEx(INFO, "Done");
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if (resp.status != PM3_EOPABORTED)
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return resp.status;
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return PM3_SUCCESS;
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}
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static command_t CommandTable[] = {
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{"help", CmdHelp, AlwaysAvailable, "this help"},
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{"demod", CmdFdxDemod, AlwaysAvailable, "demodulate a FDX-B ISO11784/85 tag from the GraphBuffer"},
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{"read", CmdFdxRead, IfPm3Lf, "attempt to read and extract tag data"},
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{"clone", CmdFdxClone, IfPm3Lf, "clone animal ID tag to T55x7 (or to q5/T5555)"},
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{"sim", CmdFdxSim, IfPm3Lf, "simulate Animal ID tag"},
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{NULL, NULL, NULL, NULL}
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};
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static int CmdHelp(const char *Cmd) {
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(void)Cmd; // Cmd is not used so far
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CmdsHelp(CommandTable);
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return PM3_SUCCESS;
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}
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int CmdLFFdx(const char *Cmd) {
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clearCommandBuffer();
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return CmdsParse(CommandTable, Cmd);
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}
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// Ask/Biphase Demod then try to locate an ISO 11784/85 ID
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// BitStream must contain previously askrawdemod and biphasedemoded data
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int detectFDXB(uint8_t *dest, size_t *size) {
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//make sure buffer has enough data
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if (*size < 128 * 2) return -1;
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size_t startIdx = 0;
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uint8_t preamble[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
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if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx))
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return -2; //preamble not found
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if (*size != 128) return -3; //wrong demoded size
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//return start position
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return (int)startIdx;
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}
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int demodFDX(void) {
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return CmdFdxDemod("");
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}
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int getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) {
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// add preamble ten 0x00 and one 0x01
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memset(bits, 0x00, 10);
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bits[10] = 1;
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// 128bits
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// every 9th bit is 0x01, but we can just fill the rest with 0x01 and overwrite
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memset(bits, 0x01, 128);
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// add preamble ten 0x00 and one 0x01
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memset(bits, 0x00, 10);
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// add reserved
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num_to_bytebitsLSBF(0x00, 7, bits + 66);
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num_to_bytebitsLSBF(0x00 >> 7, 7, bits + 74);
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// add animal flag - OK
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bits[65] = isanimal;
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// add extended flag - OK
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bits[81] = isextended;
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// add national code 40bits - OK
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num_to_bytebitsLSBF(national_id >> 0, 8, bits + 11);
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num_to_bytebitsLSBF(national_id >> 8, 8, bits + 20);
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num_to_bytebitsLSBF(national_id >> 16, 8, bits + 29);
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num_to_bytebitsLSBF(national_id >> 24, 8, bits + 38);
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num_to_bytebitsLSBF(national_id >> 32, 6, bits + 47);
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// add country code - OK
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num_to_bytebitsLSBF(country >> 0, 2, bits + 53);
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num_to_bytebitsLSBF(country >> 2, 8, bits + 56);
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// add crc-16 - OK
|
|
uint8_t raw[8];
|
|
for (uint8_t i = 0; i < 8; ++i)
|
|
raw[i] = bytebits_to_byte(bits + 11 + i * 9, 8);
|
|
|
|
uint16_t crc = crc16_kermit(raw, 8);
|
|
num_to_bytebitsLSBF(crc >> 0, 8, bits + 83);
|
|
num_to_bytebitsLSBF(crc >> 8, 8, bits + 92);
|
|
|
|
// extended data - OK
|
|
num_to_bytebitsLSBF(extended >> 0, 8, bits + 101);
|
|
num_to_bytebitsLSBF(extended >> 8, 8, bits + 110);
|
|
num_to_bytebitsLSBF(extended >> 16, 8, bits + 119);
|
|
return PM3_SUCCESS;
|
|
}
|
|
|