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https://github.com/Proxmark/proxmark3.git
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3f306c6ded
Changed CmdBiphaseDecodeRaw to allow 7 digits Changed CmdFdxRead to read 39999 samples instead of 10000 to improve reading from small tags
321 lines
10 KiB
C
321 lines
10 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 <stdio.h>
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#include <inttypes.h>
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#include <string.h>
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#include "comms.h"
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#include "ui.h" // for PrintAndLog
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#include "util.h"
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#include "cmdparser.h"
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#include "cmddata.h"
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#include "cmdmain.h"
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#include "cmdlf.h"
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#include "crc16.h"
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#include "protocols.h"
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#include "lfdemod.h"
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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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int usage_lf_fdx_clone(void){
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PrintAndLog("Clone a FDX-B animal tag to a T55x7 tag.");
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PrintAndLog("Usage: lf fdx clone [h] <country id> <animal id> <Q5>");
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PrintAndLog("Options:");
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PrintAndLog(" h : This help");
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PrintAndLog(" <country id> : Country id");
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PrintAndLog(" <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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PrintAndLog(" <Q5> : Specify write to Q5 (t5555 instead of t55x7)");
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PrintAndLog("");
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PrintAndLog("Sample: lf fdx clone 999 112233");
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return 0;
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}
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int usage_lf_fdx_sim(void) {
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PrintAndLog("Enables simulation of FDX-B animal tag");
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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 fdx sim [h] <country id> <animal id>");
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PrintAndLog("Options:");
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PrintAndLog(" h : This help");
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PrintAndLog(" <country id> : Country ID");
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PrintAndLog(" <animal id> : Animal ID");
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PrintAndLog("");
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PrintAndLog("Sample: lf fdx sim 999 112233");
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return 0;
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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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PrintAndLog("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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PrintAndLog("Country ID Truncated to 10bits: %03d", countryid);
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}
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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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// 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
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uint8_t raw[8];
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for (uint8_t i=0; i<8; ++i)
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raw[i] = bytebits_to_byte(bits + 11 + i * 9, 8);
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uint16_t crc = crc16_ccitt_kermit(raw, 8);
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num_to_bytebitsLSBF(crc >> 0, 8, bits+83);
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num_to_bytebitsLSBF(crc >> 8, 8, bits+92);
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// extended data - OK
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num_to_bytebitsLSBF( extended >> 0 , 8, bits+101);
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num_to_bytebitsLSBF( extended >> 8 , 8, bits+110);
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num_to_bytebitsLSBF( extended >> 16, 8, bits+119);
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return 1;
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}
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int CmdFdxDemod(const char *Cmd){
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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)) {
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if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B ASKbiphaseDemod failed");
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return 0;
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}
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size_t size = DemodBufferLen;
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int preambleIndex = FDXBdemodBI(DemodBuffer, &size);
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if (preambleIndex < 0){
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if (g_debugMode){
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if (preambleIndex == -1)
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PrintAndLog("DEBUG: Error - FDX-B too few bits found");
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else if (preambleIndex == -2)
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PrintAndLog("DEBUG: Error - FDX-B preamble not found");
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else if (preambleIndex == -3)
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PrintAndLog("DEBUG: Error - FDX-B Size not correct: %d", size);
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else
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PrintAndLog("DEBUG: Error - FDX-B ans: %d", preambleIndex);
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}
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return 0;
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}
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// set and leave DemodBuffer intact
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setDemodBuf(DemodBuffer, 128, preambleIndex);
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setClockGrid(g_DemodClock, g_DemodStartIdx + (preambleIndex*g_DemodClock));
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uint8_t bits_no_spacer[117];
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memcpy(bits_no_spacer, DemodBuffer + 11, 117);
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// remove marker bits (1's every 9th digit after preamble) (pType = 2)
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size = removeParity(bits_no_spacer, 0, 9, 2, 117);
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if ( size != 104 ) {
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if (g_debugMode) PrintAndLog("DEBUG: Error removeParity:: %d", size);
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return 0;
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}
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//got a good demod
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uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(bits_no_spacer+32,6)) << 32) | bytebits_to_byteLSBF(bits_no_spacer,32);
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uint32_t countryCode = bytebits_to_byteLSBF(bits_no_spacer+38,10);
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uint8_t dataBlockBit = bits_no_spacer[48];
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uint32_t reservedCode = bytebits_to_byteLSBF(bits_no_spacer+49,14);
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uint8_t animalBit = bits_no_spacer[63];
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uint32_t crc16 = bytebits_to_byteLSBF(bits_no_spacer+64,16);
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uint32_t extended = bytebits_to_byteLSBF(bits_no_spacer+80,24);
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uint64_t rawid = ((uint64_t)bytebits_to_byte(bits_no_spacer,32)<<32) | bytebits_to_byte(bits_no_spacer+32,32);
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uint8_t raw[8];
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num_to_bytes(rawid, 8, raw);
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if (g_debugMode) {
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PrintAndLog("DEBUG: bits_no_spacer:\n%s",sprint_bin_break(bits_no_spacer,size,16));
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PrintAndLog("DEBUG: Start marker %d; Size %d", preambleIndex, size);
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PrintAndLog("DEBUG: Raw ID Hex: %s", sprint_hex(raw,8));
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}
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uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
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PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
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PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode);
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PrintAndLog("National Code: %012" PRIu64, NationalCode);
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PrintAndLog("CountryCode: %04u", countryCode);
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PrintAndLog("Reserved Code: %u", reservedCode);
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PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
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PrintAndLog("Has Extended: %s [0x%X]", dataBlockBit ? "True" : "False", extended);
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PrintAndLog("CRC: 0x%04X - 0x%04X - [%s]\n", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
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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 1;
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}
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int CmdFdxRead(const char *Cmd) {
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lf_read(true, 39999);
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return CmdFdxDemod(Cmd);
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}
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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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uint32_t blocks[5] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0};
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uint8_t bits[128];
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uint8_t *bs = bits;
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memset(bs, 0, sizeof(bits));
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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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//Q5
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if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q') {
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//t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
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blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | ((32-2)>>1) << T5555_BITRATE_SHIFT | 4 << T5555_MAXBLOCK_SHIFT;
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}
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verify_values(countryid, animalid);
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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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if ( !getFDXBits(animalid, countryid, 1, 0, 0, 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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// convert from bit stream to block data
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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 FDX-B to T55x7 with animal ID: %04u-%"PRIu64, countryid, animalid);
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PrintAndLog("Blk | Data ");
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PrintAndLog("----+------------");
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PrintAndLog(" 00 | 0x%08x", blocks[0]);
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PrintAndLog(" 01 | 0x%08x", blocks[1]);
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PrintAndLog(" 02 | 0x%08x", blocks[2]);
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PrintAndLog(" 03 | 0x%08x", blocks[3]);
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PrintAndLog(" 04 | 0x%08x", blocks[4]);
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UsbCommand resp;
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UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
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for (int i = 4; i >= 0; --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, T55XX_WRITE_TIMEOUT)){
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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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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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uint8_t clk = 32, encoding = 2, separator = 0, invert = 1;
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uint16_t arg1, arg2;
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size_t size = 128;
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arg1 = clk << 8 | encoding;
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arg2 = invert << 8 | separator;
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PrintAndLog("Simulating FDX-B animal ID: %04u-%"PRIu64, countryid, animalid);
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UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
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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, c.d.asBytes);
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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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static command_t CommandTable[] = {
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{"help", CmdHelp, 1, "This help"},
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{"demod", CmdFdxDemod,1, "Attempt to extract FDX-B ISO11784/85 data from the GraphBuffer"},
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{"read", CmdFdxRead, 0, "Attempt to read and extract FDX-B ISO11784/85 data"},
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{"clone", CmdFdxClone,0, "Clone animal ID tag to T55x7 (or to q5/T5555)"},
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{"sim", CmdFdxSim, 0, "Animal ID tag simulator"},
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{NULL, NULL, 0, NULL}
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};
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int CmdLFFdx(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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