| 1 | //----------------------------------------------------------------------------- |
| 2 | // |
| 3 | // This code is licensed to you under the terms of the GNU GPL, version 2 or, |
| 4 | // at your option, any later version. See the LICENSE.txt file for the text of |
| 5 | // the license. |
| 6 | //----------------------------------------------------------------------------- |
| 7 | // Low frequency fdx-b tag commands |
| 8 | // Differential Biphase, rf/32, 128 bits (known) |
| 9 | //----------------------------------------------------------------------------- |
| 10 | |
| 11 | #include "cmdlffdx.h" |
| 12 | |
| 13 | #include <stdio.h> |
| 14 | #include <inttypes.h> |
| 15 | #include <string.h> |
| 16 | #include "comms.h" |
| 17 | #include "ui.h" // for PrintAndLog |
| 18 | #include "util.h" |
| 19 | #include "cmdparser.h" |
| 20 | #include "cmddata.h" |
| 21 | #include "cmdmain.h" |
| 22 | #include "cmdlf.h" |
| 23 | #include "crc16.h" |
| 24 | #include "protocols.h" |
| 25 | #include "lfdemod.h" |
| 26 | |
| 27 | /* |
| 28 | FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits) |
| 29 | 8 databits + 1 parity (1) |
| 30 | CIITT 16 checksum |
| 31 | NATIONAL CODE, ICAR database |
| 32 | COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf |
| 33 | FLAG (animal/non-animal) |
| 34 | |
| 35 | 38 IDbits |
| 36 | 10 country code |
| 37 | 1 extra app bit |
| 38 | 14 reserved bits |
| 39 | 1 animal bit |
| 40 | 16 ccitt CRC chksum over 64bit ID CODE. |
| 41 | 24 appli bits. |
| 42 | |
| 43 | sample: 985121004515220 [ 37FF65B88EF94 ] |
| 44 | */ |
| 45 | |
| 46 | static int CmdHelp(const char *Cmd); |
| 47 | |
| 48 | int usage_lf_fdx_clone(void){ |
| 49 | PrintAndLog("Clone a FDX-B animal tag to a T55x7 tag."); |
| 50 | PrintAndLog("Usage: lf fdx clone [h] <country id> <animal id> <Q5>"); |
| 51 | PrintAndLog("Options:"); |
| 52 | PrintAndLog(" h : This help"); |
| 53 | PrintAndLog(" <country id> : Country id"); |
| 54 | PrintAndLog(" <animal id> : Animal id"); |
| 55 | // has extended data? |
| 56 | //reserved/rfu |
| 57 | //is animal tag |
| 58 | // extended data |
| 59 | PrintAndLog(" <Q5> : Specify write to Q5 (t5555 instead of t55x7)"); |
| 60 | PrintAndLog(""); |
| 61 | PrintAndLog("Sample: lf fdx clone 999 112233"); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | int usage_lf_fdx_sim(void) { |
| 66 | PrintAndLog("Enables simulation of FDX-B animal tag"); |
| 67 | PrintAndLog("Simulation runs until the button is pressed or another USB command is issued."); |
| 68 | PrintAndLog(""); |
| 69 | PrintAndLog("Usage: lf fdx sim [h] <country id> <animal id>"); |
| 70 | PrintAndLog("Options:"); |
| 71 | PrintAndLog(" h : This help"); |
| 72 | PrintAndLog(" <country id> : Country ID"); |
| 73 | PrintAndLog(" <animal id> : Animal ID"); |
| 74 | PrintAndLog(""); |
| 75 | PrintAndLog("Sample: lf fdx sim 999 112233"); |
| 76 | return 0; |
| 77 | } |
| 78 | // clearing the topbit needed for the preambl detection. |
| 79 | static void verify_values(uint32_t countryid, uint64_t animalid){ |
| 80 | if ((animalid & 0x3FFFFFFFFF) != animalid) { |
| 81 | animalid &= 0x3FFFFFFFFF; |
| 82 | PrintAndLog("Animal ID Truncated to 38bits: %"PRIx64, animalid); |
| 83 | } |
| 84 | if ( (countryid & 0x3ff) != countryid ) { |
| 85 | countryid &= 0x3ff; |
| 86 | PrintAndLog("Country ID Truncated to 10bits: %03d", countryid); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | int getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) { |
| 91 | |
| 92 | // 128bits |
| 93 | // every 9th bit is 0x01, but we can just fill the rest with 0x01 and overwrite |
| 94 | memset(bits, 0x01, 128); |
| 95 | |
| 96 | // add preamble ten 0x00 and one 0x01 |
| 97 | memset(bits, 0x00, 10); |
| 98 | |
| 99 | // add reserved |
| 100 | num_to_bytebitsLSBF(0x00, 7, bits + 66); |
| 101 | num_to_bytebitsLSBF(0x00 >> 7, 7, bits + 74); |
| 102 | |
| 103 | // add animal flag - OK |
| 104 | bits[65] = isanimal; |
| 105 | |
| 106 | // add extended flag - OK |
| 107 | bits[81] = isextended; |
| 108 | |
| 109 | // add national code 40bits - OK |
| 110 | num_to_bytebitsLSBF(national_id >> 0, 8, bits+11); |
| 111 | num_to_bytebitsLSBF(national_id >> 8, 8, bits+20); |
| 112 | num_to_bytebitsLSBF(national_id >> 16, 8, bits+29); |
| 113 | num_to_bytebitsLSBF(national_id >> 24, 8, bits+38); |
| 114 | num_to_bytebitsLSBF(national_id >> 32, 6, bits+47); |
| 115 | |
| 116 | // add country code - OK |
| 117 | num_to_bytebitsLSBF(country >> 0, 2, bits+53); |
| 118 | num_to_bytebitsLSBF(country >> 2, 8, bits+56); |
| 119 | |
| 120 | // add crc-16 - OK |
| 121 | uint8_t raw[8]; |
| 122 | for (uint8_t i=0; i<8; ++i) |
| 123 | raw[i] = bytebits_to_byte(bits + 11 + i * 9, 8); |
| 124 | |
| 125 | uint16_t crc = crc16_ccitt_kermit(raw, 8); |
| 126 | num_to_bytebitsLSBF(crc >> 0, 8, bits+83); |
| 127 | num_to_bytebitsLSBF(crc >> 8, 8, bits+92); |
| 128 | |
| 129 | // extended data - OK |
| 130 | num_to_bytebitsLSBF( extended >> 0 , 8, bits+101); |
| 131 | num_to_bytebitsLSBF( extended >> 8 , 8, bits+110); |
| 132 | num_to_bytebitsLSBF( extended >> 16, 8, bits+119); |
| 133 | return 1; |
| 134 | } |
| 135 | |
| 136 | int CmdFdxDemod(const char *Cmd){ |
| 137 | |
| 138 | //Differential Biphase / di-phase (inverted biphase) |
| 139 | //get binary from ask wave |
| 140 | if (!ASKbiphaseDemod("0 32 1 100", false)) { |
| 141 | if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B ASKbiphaseDemod failed"); |
| 142 | return 0; |
| 143 | } |
| 144 | size_t size = DemodBufferLen; |
| 145 | int preambleIndex = FDXBdemodBI(DemodBuffer, &size); |
| 146 | if (preambleIndex < 0){ |
| 147 | if (g_debugMode){ |
| 148 | if (preambleIndex == -1) |
| 149 | PrintAndLog("DEBUG: Error - FDX-B too few bits found"); |
| 150 | else if (preambleIndex == -2) |
| 151 | PrintAndLog("DEBUG: Error - FDX-B preamble not found"); |
| 152 | else if (preambleIndex == -3) |
| 153 | PrintAndLog("DEBUG: Error - FDX-B Size not correct: %d", size); |
| 154 | else |
| 155 | PrintAndLog("DEBUG: Error - FDX-B ans: %d", preambleIndex); |
| 156 | } |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | // set and leave DemodBuffer intact |
| 161 | setDemodBuf(DemodBuffer, 128, preambleIndex); |
| 162 | setClockGrid(g_DemodClock, g_DemodStartIdx + (preambleIndex*g_DemodClock)); |
| 163 | |
| 164 | uint8_t bits_no_spacer[117]; |
| 165 | memcpy(bits_no_spacer, DemodBuffer + 11, 117); |
| 166 | |
| 167 | // remove marker bits (1's every 9th digit after preamble) (pType = 2) |
| 168 | size = removeParity(bits_no_spacer, 0, 9, 2, 117); |
| 169 | if ( size != 104 ) { |
| 170 | if (g_debugMode) PrintAndLog("DEBUG: Error removeParity:: %d", size); |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | //got a good demod |
| 175 | uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(bits_no_spacer+32,6)) << 32) | bytebits_to_byteLSBF(bits_no_spacer,32); |
| 176 | uint32_t countryCode = bytebits_to_byteLSBF(bits_no_spacer+38,10); |
| 177 | uint8_t dataBlockBit = bits_no_spacer[48]; |
| 178 | uint32_t reservedCode = bytebits_to_byteLSBF(bits_no_spacer+49,14); |
| 179 | uint8_t animalBit = bits_no_spacer[63]; |
| 180 | uint32_t crc16 = bytebits_to_byteLSBF(bits_no_spacer+64,16); |
| 181 | uint32_t extended = bytebits_to_byteLSBF(bits_no_spacer+80,24); |
| 182 | |
| 183 | uint64_t rawid = ((uint64_t)bytebits_to_byte(bits_no_spacer,32)<<32) | bytebits_to_byte(bits_no_spacer+32,32); |
| 184 | uint8_t raw[8]; |
| 185 | num_to_bytes(rawid, 8, raw); |
| 186 | |
| 187 | if (g_debugMode) { |
| 188 | PrintAndLog("DEBUG: bits_no_spacer:\n%s",sprint_bin_break(bits_no_spacer,size,16)); |
| 189 | PrintAndLog("DEBUG: Start marker %d; Size %d", preambleIndex, size); |
| 190 | PrintAndLog("DEBUG: Raw ID Hex: %s", sprint_hex(raw,8)); |
| 191 | } |
| 192 | |
| 193 | uint16_t calcCrc = crc16_ccitt_kermit(raw, 8); |
| 194 | PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:"); |
| 195 | PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode); |
| 196 | PrintAndLog("National Code: %012" PRIu64, NationalCode); |
| 197 | PrintAndLog("CountryCode: %04u", countryCode); |
| 198 | PrintAndLog("Reserved Code: %u", reservedCode); |
| 199 | PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False"); |
| 200 | PrintAndLog("Has Extended: %s [0x%X]", dataBlockBit ? "True" : "False", extended); |
| 201 | PrintAndLog("CRC: 0x%04X - 0x%04X - [%s]\n", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed"); |
| 202 | |
| 203 | // set block 0 for later |
| 204 | //g_DemodConfig = T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT; |
| 205 | return 1; |
| 206 | } |
| 207 | |
| 208 | int CmdFdxRead(const char *Cmd) { |
| 209 | lf_read(true, 39999); |
| 210 | return CmdFdxDemod(Cmd); |
| 211 | } |
| 212 | |
| 213 | int CmdFdxClone(const char *Cmd) { |
| 214 | |
| 215 | uint32_t countryid = 0; |
| 216 | uint64_t animalid = 0; |
| 217 | uint32_t blocks[5] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0}; |
| 218 | uint8_t bits[128]; |
| 219 | uint8_t *bs = bits; |
| 220 | memset(bs, 0, sizeof(bits)); |
| 221 | |
| 222 | char cmdp = param_getchar(Cmd, 0); |
| 223 | if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_clone(); |
| 224 | |
| 225 | countryid = param_get32ex(Cmd, 0, 0, 10); |
| 226 | animalid = param_get64ex(Cmd, 1, 0, 10); |
| 227 | |
| 228 | //Q5 |
| 229 | if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q') { |
| 230 | //t5555 (Q5) BITRATE = (RF-2)/2 (iceman) |
| 231 | blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | ((32-2)>>1) << T5555_BITRATE_SHIFT | 4 << T5555_MAXBLOCK_SHIFT; |
| 232 | } |
| 233 | |
| 234 | verify_values(countryid, animalid); |
| 235 | |
| 236 | // getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) |
| 237 | if ( !getFDXBits(animalid, countryid, 1, 0, 0, bs)) { |
| 238 | PrintAndLog("Error with tag bitstream generation."); |
| 239 | return 1; |
| 240 | } |
| 241 | |
| 242 | // convert from bit stream to block data |
| 243 | blocks[1] = bytebits_to_byte(bs,32); |
| 244 | blocks[2] = bytebits_to_byte(bs+32,32); |
| 245 | blocks[3] = bytebits_to_byte(bs+64,32); |
| 246 | blocks[4] = bytebits_to_byte(bs+96,32); |
| 247 | |
| 248 | PrintAndLog("Preparing to clone FDX-B to T55x7 with animal ID: %04u-%"PRIu64, countryid, animalid); |
| 249 | PrintAndLog("Blk | Data "); |
| 250 | PrintAndLog("----+------------"); |
| 251 | PrintAndLog(" 00 | 0x%08x", blocks[0]); |
| 252 | PrintAndLog(" 01 | 0x%08x", blocks[1]); |
| 253 | PrintAndLog(" 02 | 0x%08x", blocks[2]); |
| 254 | PrintAndLog(" 03 | 0x%08x", blocks[3]); |
| 255 | PrintAndLog(" 04 | 0x%08x", blocks[4]); |
| 256 | |
| 257 | UsbCommand resp; |
| 258 | UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}}; |
| 259 | |
| 260 | for (int i = 4; i >= 0; --i) { |
| 261 | c.arg[0] = blocks[i]; |
| 262 | c.arg[1] = i; |
| 263 | clearCommandBuffer(); |
| 264 | SendCommand(&c); |
| 265 | if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){ |
| 266 | PrintAndLog("Error occurred, device did not respond during write operation."); |
| 267 | return -1; |
| 268 | } |
| 269 | } |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | int CmdFdxSim(const char *Cmd) { |
| 274 | uint32_t countryid = 0; |
| 275 | uint64_t animalid = 0; |
| 276 | |
| 277 | char cmdp = param_getchar(Cmd, 0); |
| 278 | if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_sim(); |
| 279 | |
| 280 | countryid = param_get32ex(Cmd, 0, 0, 10); |
| 281 | animalid = param_get64ex(Cmd, 1, 0, 10); |
| 282 | |
| 283 | verify_values(countryid, animalid); |
| 284 | |
| 285 | uint8_t clk = 32, encoding = 2, separator = 0, invert = 1; |
| 286 | uint16_t arg1, arg2; |
| 287 | size_t size = 128; |
| 288 | arg1 = clk << 8 | encoding; |
| 289 | arg2 = invert << 8 | separator; |
| 290 | |
| 291 | PrintAndLog("Simulating FDX-B animal ID: %04u-%"PRIu64, countryid, animalid); |
| 292 | |
| 293 | UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}}; |
| 294 | |
| 295 | //getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) |
| 296 | getFDXBits(animalid, countryid, 1, 0, 0, c.d.asBytes); |
| 297 | clearCommandBuffer(); |
| 298 | SendCommand(&c); |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | static command_t CommandTable[] = { |
| 303 | {"help", CmdHelp, 1, "This help"}, |
| 304 | {"demod", CmdFdxDemod,1, "Attempt to extract FDX-B ISO11784/85 data from the GraphBuffer"}, |
| 305 | {"read", CmdFdxRead, 0, "Attempt to read and extract FDX-B ISO11784/85 data"}, |
| 306 | {"clone", CmdFdxClone,0, "Clone animal ID tag to T55x7 (or to q5/T5555)"}, |
| 307 | {"sim", CmdFdxSim, 0, "Animal ID tag simulator"}, |
| 308 | {NULL, NULL, 0, NULL} |
| 309 | }; |
| 310 | |
| 311 | int CmdLFFdx(const char *Cmd) { |
| 312 | clearCommandBuffer(); |
| 313 | CmdsParse(CommandTable, Cmd); |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | int CmdHelp(const char *Cmd) { |
| 318 | CmdsHelp(CommandTable); |
| 319 | return 0; |
| 320 | } |