| 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 Noralsy tag commands |
| 8 | // ASK/Manchester, STT, RF/32, 96 bits long (some bits unknown) |
| 9 | //----------------------------------------------------------------------------- |
| 10 | #include "cmdlfnoralsy.h" |
| 11 | #include <string.h> |
| 12 | #include <inttypes.h> |
| 13 | #include <math.h> |
| 14 | #include "proxmark3.h" |
| 15 | #include "ui.h" |
| 16 | #include "util.h" |
| 17 | #include "graph.h" |
| 18 | #include "cmdparser.h" |
| 19 | #include "cmddata.h" |
| 20 | #include "cmdmain.h" |
| 21 | #include "cmdlf.h" |
| 22 | #include "protocols.h" // for T55xx config register definitions |
| 23 | #include "lfdemod.h" // parityTest |
| 24 | |
| 25 | static int CmdHelp(const char *Cmd); |
| 26 | |
| 27 | int usage_lf_noralsy_clone(void){ |
| 28 | PrintAndLog("clone a Noralsy tag to a T55x7 tag."); |
| 29 | PrintAndLog("Usage: lf noralsy clone [h] <card id> <year> <Q5>"); |
| 30 | PrintAndLog("Options:"); |
| 31 | PrintAndLog(" h : This help"); |
| 32 | PrintAndLog(" <card id> : Noralsy card ID"); |
| 33 | PrintAndLog(" <year> : Tag allocation year"); |
| 34 | PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)"); |
| 35 | PrintAndLog(""); |
| 36 | PrintAndLog("Sample: lf noralsy clone 112233"); |
| 37 | return 0; |
| 38 | } |
| 39 | |
| 40 | int usage_lf_noralsy_sim(void) { |
| 41 | PrintAndLog("Enables simulation of Noralsy card with specified card number."); |
| 42 | PrintAndLog("Simulation runs until the button is pressed or another USB command is issued."); |
| 43 | PrintAndLog(""); |
| 44 | PrintAndLog("Usage: lf noralsy sim [h] <card id> <year>"); |
| 45 | PrintAndLog("Options:"); |
| 46 | PrintAndLog(" h : This help"); |
| 47 | PrintAndLog(" <card id> : Noralsy card ID"); |
| 48 | PrintAndLog(" <year> : Tag allocation year"); |
| 49 | PrintAndLog(""); |
| 50 | PrintAndLog("Sample: lf noralsy sim 112233"); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static uint8_t noralsy_chksum( uint8_t* bits, uint8_t len) { |
| 55 | uint8_t sum = 0; |
| 56 | for (uint8_t i = 0; i < len; i += 4) |
| 57 | sum ^= bytebits_to_byte(bits+i, 4); |
| 58 | return sum & 0x0F ; |
| 59 | } |
| 60 | int getnoralsyBits(uint32_t id, uint16_t year, uint8_t *bits) { |
| 61 | //preamp |
| 62 | num_to_bytebits(0xBB0214FF, 32, bits); // --> Have seen 0xBB0214FF / 0xBB0314FF UNKNOWN |
| 63 | |
| 64 | year &= 0xFF; |
| 65 | |
| 66 | uint16_t sub1 = (id & 0xFFF0000) >> 16; |
| 67 | uint8_t sub2 = (id & 0x000FF00) >> 8; |
| 68 | uint8_t sub3 = (id & 0x00000FF); |
| 69 | |
| 70 | num_to_bytebits(sub1, 12, bits+32); |
| 71 | num_to_bytebits(year, 8, bits+44); |
| 72 | num_to_bytebits(0, 4, bits+52); // --> UNKNOWN. Flag? |
| 73 | |
| 74 | num_to_bytebits(sub2, 8, bits+56); |
| 75 | num_to_bytebits(sub3, 8, bits+64); |
| 76 | |
| 77 | //chksum byte |
| 78 | uint8_t chksum = noralsy_chksum(bits+32, 40); |
| 79 | num_to_bytebits(chksum, 4, bits+72); |
| 80 | chksum = noralsy_chksum(bits, 76); |
| 81 | num_to_bytebits(chksum, 4, bits+76); |
| 82 | return 1; |
| 83 | } |
| 84 | |
| 85 | // by iceman |
| 86 | // find Noralsy preamble in already demoded data |
| 87 | int NoralsyDemod_AM(uint8_t *dest, size_t *size) { |
| 88 | if (*size < 96) return -1; //make sure buffer has data |
| 89 | size_t startIdx = 0; |
| 90 | uint8_t preamble[] = {1,0,1,1,1,0,1,1,0,0,0,0}; |
| 91 | if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx)) |
| 92 | return -2; //preamble not found |
| 93 | if (*size != 96) return -3; //wrong demoded size |
| 94 | //return start position |
| 95 | return (int)startIdx; |
| 96 | } |
| 97 | |
| 98 | /* |
| 99 | * |
| 100 | * 2520116 | BB0214FF2529900116360000 | 10111011 00000011 00010100 11111111 00100101 00101001 10010000 00000001 00010110 00110110 00000000 00000000 |
| 101 | * aaa*aaaaiiiYY*iiiicc---- **** iiiiiiii iiiiYYYY YYYY**** iiiiiiii iiiiiiii cccccccc |
| 102 | * |
| 103 | * a = fixed value BB0*14FF |
| 104 | * i = printed id, BCD-format |
| 105 | * Y = year |
| 106 | * c = checksum |
| 107 | * * = unknown |
| 108 | * |
| 109 | **/ |
| 110 | |
| 111 | //see ASKDemod for what args are accepted |
| 112 | int CmdNoralsyDemod(const char *Cmd) { |
| 113 | |
| 114 | //ASK / Manchester |
| 115 | bool st = true; |
| 116 | if (!ASKDemod_ext("32 0 0", false, false, 1, &st)) { |
| 117 | if (g_debugMode) PrintAndLog("DEBUG: Error - Noralsy: ASK/Manchester Demod failed"); |
| 118 | return 0; |
| 119 | } |
| 120 | if (!st) return 0; |
| 121 | |
| 122 | size_t size = DemodBufferLen; |
| 123 | int ans = NoralsyDemod_AM(DemodBuffer, &size); |
| 124 | if (ans < 0){ |
| 125 | if (g_debugMode){ |
| 126 | if (ans == -1) |
| 127 | PrintAndLog("DEBUG: Error - Noralsy: too few bits found"); |
| 128 | else if (ans == -2) |
| 129 | PrintAndLog("DEBUG: Error - Noralsy: preamble not found"); |
| 130 | else if (ans == -3) |
| 131 | PrintAndLog("DEBUG: Error - Noralsy: Size not correct: %d", size); |
| 132 | else |
| 133 | PrintAndLog("DEBUG: Error - Noralsy: ans: %d", ans); |
| 134 | } |
| 135 | return 0; |
| 136 | } |
| 137 | setDemodBuf(DemodBuffer, 96, ans); |
| 138 | setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock)); |
| 139 | //setGrid_Clock(32); |
| 140 | |
| 141 | //got a good demod |
| 142 | uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32); |
| 143 | uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32); |
| 144 | uint32_t raw3 = bytebits_to_byte(DemodBuffer+64, 32); |
| 145 | |
| 146 | uint32_t cardid = (bytebits_to_byte(DemodBuffer+32, 12)<<16) | bytebits_to_byte(DemodBuffer+32+24, 16); |
| 147 | |
| 148 | uint16_t year = (raw2 & 0x000ff000) >> 12; |
| 149 | year += ( year > 0x60 ) ? 0x1900: 0x2000; |
| 150 | |
| 151 | // calc checksums |
| 152 | uint8_t calc1 = noralsy_chksum(DemodBuffer+32, 40); |
| 153 | uint8_t calc2 = noralsy_chksum(DemodBuffer, 76); |
| 154 | uint8_t chk1 = 0, chk2 = 0; |
| 155 | chk1 = bytebits_to_byte(DemodBuffer+72, 4); |
| 156 | chk2 = bytebits_to_byte(DemodBuffer+76, 4); |
| 157 | // test checksums |
| 158 | if ( chk1 != calc1 ) { |
| 159 | if (g_debugMode) PrintAndLog("DEBUG: Error - Noralsy: checksum 1 failed %x - %x\n", chk1, calc1); |
| 160 | return 0; |
| 161 | } |
| 162 | if ( chk2 != calc2 ) { |
| 163 | if (g_debugMode) PrintAndLog("DEBUG: Error - Noralsy: checksum 2 failed %x - %x\n", chk2, calc2); |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | PrintAndLog("Noralsy Tag Found: Card ID %X, Year: %X Raw: %08X%08X%08X", cardid, year, raw1 ,raw2, raw3); |
| 168 | if (raw1 != 0xBB0214FF) { |
| 169 | PrintAndLog("Unknown bits set in first block! Expected 0xBB0214FF, Found: 0x%08X", raw1); |
| 170 | PrintAndLog("Please post this output in forum to further research on this format"); |
| 171 | } |
| 172 | return 1; |
| 173 | } |
| 174 | |
| 175 | int CmdNoralsyRead(const char *Cmd) { |
| 176 | lf_read(true, 8000); |
| 177 | return CmdNoralsyDemod(Cmd); |
| 178 | } |
| 179 | |
| 180 | int CmdNoralsyClone(const char *Cmd) { |
| 181 | |
| 182 | uint16_t year = 0; |
| 183 | uint32_t id = 0; |
| 184 | uint32_t blocks[4] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | T55x7_ST_TERMINATOR | 3 << T55x7_MAXBLOCK_SHIFT, 0, 0}; |
| 185 | uint8_t bits[96]; |
| 186 | uint8_t *bs = bits; |
| 187 | memset(bs, 0, sizeof(bits)); |
| 188 | |
| 189 | char cmdp = param_getchar(Cmd, 0); |
| 190 | if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_noralsy_clone(); |
| 191 | |
| 192 | id = param_get32ex(Cmd, 0, 0, 16); |
| 193 | year = param_get32ex(Cmd, 1, 2000, 16); |
| 194 | |
| 195 | //Q5 |
| 196 | if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q') { |
| 197 | //t5555 (Q5) BITRATE = (RF-2)/2 (iceman) |
| 198 | blocks[0] = T5555_MODULATION_MANCHESTER | ((32-2)>>1) << T5555_BITRATE_SHIFT | T5555_ST_TERMINATOR | 3 << T5555_MAXBLOCK_SHIFT; |
| 199 | } |
| 200 | |
| 201 | if ( !getnoralsyBits(id, year, bs)) { |
| 202 | PrintAndLog("Error with tag bitstream generation."); |
| 203 | return 1; |
| 204 | } |
| 205 | |
| 206 | // |
| 207 | blocks[1] = bytebits_to_byte(bs,32); |
| 208 | blocks[2] = bytebits_to_byte(bs+32,32); |
| 209 | blocks[3] = bytebits_to_byte(bs+64,32); |
| 210 | |
| 211 | PrintAndLog("Preparing to clone Noralsy to T55x7 with CardId: %x", id); |
| 212 | PrintAndLog("Blk | Data "); |
| 213 | PrintAndLog("----+------------"); |
| 214 | PrintAndLog(" 00 | 0x%08x", blocks[0]); |
| 215 | PrintAndLog(" 01 | 0x%08x", blocks[1]); |
| 216 | PrintAndLog(" 02 | 0x%08x", blocks[2]); |
| 217 | PrintAndLog(" 03 | 0x%08x", blocks[3]); |
| 218 | |
| 219 | UsbCommand resp; |
| 220 | UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}}; |
| 221 | |
| 222 | for (int i = 3; i >= 0; --i) { |
| 223 | c.arg[0] = blocks[i]; |
| 224 | c.arg[1] = i; |
| 225 | clearCommandBuffer(); |
| 226 | SendCommand(&c); |
| 227 | if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){ |
| 228 | PrintAndLog("Error occurred, device did not respond during write operation."); |
| 229 | return -1; |
| 230 | } |
| 231 | } |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | int CmdNoralsySim(const char *Cmd) { |
| 236 | |
| 237 | uint8_t bits[96]; |
| 238 | uint8_t *bs = bits; |
| 239 | memset(bs, 0, sizeof(bits)); |
| 240 | |
| 241 | uint16_t year = 0; |
| 242 | uint32_t id = 0; |
| 243 | |
| 244 | char cmdp = param_getchar(Cmd, 0); |
| 245 | if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_noralsy_sim(); |
| 246 | |
| 247 | id = param_get32ex(Cmd, 0, 0, 16); |
| 248 | year = param_get32ex(Cmd, 1, 2000, 16); |
| 249 | |
| 250 | uint8_t clk = 32, encoding = 1, separator = 1, invert = 0; |
| 251 | uint16_t arg1, arg2; |
| 252 | size_t size = 96; |
| 253 | arg1 = clk << 8 | encoding; |
| 254 | arg2 = invert << 8 | separator; |
| 255 | |
| 256 | if ( !getnoralsyBits(id, year, bs)) { |
| 257 | PrintAndLog("Error with tag bitstream generation."); |
| 258 | return 1; |
| 259 | } |
| 260 | |
| 261 | PrintAndLog("Simulating Noralsy - CardId: %x", id); |
| 262 | |
| 263 | UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}}; |
| 264 | memcpy(c.d.asBytes, bs, size); |
| 265 | clearCommandBuffer(); |
| 266 | SendCommand(&c); |
| 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | static command_t CommandTable[] = { |
| 271 | {"help", CmdHelp, 1, "This help"}, |
| 272 | {"demod", CmdNoralsyDemod,1, "Attempt to read and extract tag data from the GraphBuffer"}, |
| 273 | {"read", CmdNoralsyRead, 0, "Attempt to read and extract tag data from the antenna"}, |
| 274 | {"clone", CmdNoralsyClone,0, "clone Noralsy tag"}, |
| 275 | {"sim", CmdNoralsySim, 0, "simulate Noralsy tag"}, |
| 276 | {NULL, NULL, 0, NULL} |
| 277 | }; |
| 278 | |
| 279 | int CmdLFNoralsy(const char *Cmd) { |
| 280 | clearCommandBuffer(); |
| 281 | CmdsParse(CommandTable, Cmd); |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | int CmdHelp(const char *Cmd) { |
| 286 | CmdsHelp(CommandTable); |
| 287 | return 0; |
| 288 | } |