mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-11 01:55:38 +08:00
269 lines
9.3 KiB
C
269 lines
9.3 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 Jablotron tag commands
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// Differential Biphase, RF/64, 64 bits long (complete)
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//-----------------------------------------------------------------------------
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#include "cmdlfjablotron.h"
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#include <string.h>
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#include <inttypes.h>
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#include <math.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include "cmdparser.h" // command_t
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#include "comms.h"
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#include "commonutil.h" // ARRAYLEN
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#include "ui.h"
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#include "cmddata.h"
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#include "cmdlf.h"
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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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static int CmdHelp(const char *Cmd);
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static int usage_lf_jablotron_clone(void) {
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PrintAndLogEx(NORMAL, "clone a Jablotron tag to a T55x7 tag.");
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PrintAndLogEx(NORMAL, "Usage: lf jablotron clone [h] <card ID> <Q5>");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h : This help");
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PrintAndLogEx(NORMAL, " <card ID> : jablotron card ID");
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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 jablotron clone 112233");
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return PM3_SUCCESS;
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}
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static int usage_lf_jablotron_sim(void) {
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PrintAndLogEx(NORMAL, "Enables simulation of jablotron card with specified card number.");
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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 jablotron sim [h] <card ID>");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h : This help");
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PrintAndLogEx(NORMAL, " <card ID> : jablotron card ID");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " lf jablotron sim 112233");
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return PM3_SUCCESS;
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}
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static uint8_t jablontron_chksum(uint8_t *bits) {
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uint8_t chksum = 0;
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for (int i = 16; i < 56; i += 8) {
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chksum += bytebits_to_byte(bits + i, 8);
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}
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chksum ^= 0x3A;
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return chksum;
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}
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static uint64_t getJablontronCardId(uint64_t rawcode) {
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uint64_t id = 0;
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uint8_t bytes[] = {0, 0, 0, 0, 0};
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num_to_bytes(rawcode, 5, bytes);
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for (int i = 4, j = 0; i > -1; --i, j += 2) {
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id += NIBBLE_LOW(bytes[i]) * (int)pow(10, j);
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id += NIBBLE_HIGH(bytes[i]) * (int)pow(10, j + 1);
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}
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return id;
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}
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//see ASKDemod for what args are accepted
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static int CmdJablotronDemod(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 64 1 0", false) != PM3_SUCCESS) {
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if (g_debugMode) PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron 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 ans = detectJablotron(DemodBuffer, &size);
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if (ans < 0) {
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if (g_debugMode) {
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if (ans == -1)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron too few bits found");
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else if (ans == -2)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron preamble not found");
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else if (ans == -3)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron size not correct: %zu", size);
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else if (ans == -5)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron checksum failed");
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else
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PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron ans: %d", ans);
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}
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return PM3_ESOFT;
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}
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setDemodBuff(DemodBuffer, 64, ans);
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setClockGrid(g_DemodClock, g_DemodStartIdx + (ans * g_DemodClock));
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//got a good demod
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uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
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uint32_t raw2 = bytebits_to_byte(DemodBuffer + 32, 32);
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// bytebits_to_byte - uint32_t
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uint64_t rawid = ((uint64_t)(bytebits_to_byte(DemodBuffer + 16, 8) & 0xff) << 32) | bytebits_to_byte(DemodBuffer + 24, 32);
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uint64_t id = getJablontronCardId(rawid);
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PrintAndLogEx(SUCCESS, "Jablotron Tag Found: Card ID: %"PRIx64" :: Raw: %08X%08X", id, raw1, raw2);
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uint8_t chksum = raw2 & 0xFF;
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PrintAndLogEx(INFO, "Checksum: %02X [%s]",
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chksum,
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(chksum == jablontron_chksum(DemodBuffer)) ? _GREEN_("OK") : _RED_("Fail")
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);
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id = DEC2BCD(id);
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// Printed format: 1410-nn-nnnn-nnnn
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PrintAndLogEx(SUCCESS, "Printed: 1410-%02X-%04X-%04X",
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(uint8_t)(id >> 32) & 0xFF,
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(uint16_t)(id >> 16) & 0xFFFF,
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(uint16_t)id & 0xFFFF
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);
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return PM3_SUCCESS;
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}
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static int CmdJablotronRead(const char *Cmd) {
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lf_read(true, 10000);
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return CmdJablotronDemod(Cmd);
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}
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static int CmdJablotronClone(const char *Cmd) {
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uint64_t fullcode = 0;
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uint32_t blocks[3] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_64 | 2 << T55x7_MAXBLOCK_SHIFT, 0, 0};
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uint8_t bits[64];
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memset(bits, 0, sizeof(bits));
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char cmdp = tolower(param_getchar(Cmd, 0));
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if (strlen(Cmd) == 0 || cmdp == 'h') return usage_lf_jablotron_clone();
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fullcode = param_get64ex(Cmd, 0, 0, 16);
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//Q5
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if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q')
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blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | T5555_SET_BITRATE(64) | 2 << T5555_MAXBLOCK_SHIFT;
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// clearing the topbit needed for the preambl detection.
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if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
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fullcode &= 0x7FFFFFFFFF;
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PrintAndLogEx(INFO, "Card Number Truncated to 39bits: %"PRIx64, fullcode);
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}
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if (getJablotronBits(fullcode, bits) != PM3_SUCCESS) {
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PrintAndLogEx(ERR, "Error with tag bitstream generation.");
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return PM3_ESOFT;
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}
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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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PrintAndLogEx(INFO, "Preparing to clone Jablotron to T55x7 with FullCode: %"PRIx64, fullcode);
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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 CmdJablotronSim(const char *Cmd) {
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uint64_t fullcode = 0;
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char cmdp = tolower(param_getchar(Cmd, 0));
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if (strlen(Cmd) == 0 || cmdp == 'h') return usage_lf_jablotron_sim();
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fullcode = param_get64ex(Cmd, 0, 0, 16);
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// clearing the topbit needed for the preambl detection.
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if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
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fullcode &= 0x7FFFFFFFFF;
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PrintAndLogEx(INFO, "Card Number Truncated to 39bits: %"PRIx64, fullcode);
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}
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PrintAndLogEx(SUCCESS, "Simulating Jablotron - FullCode: %"PRIx64, fullcode);
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uint8_t bs[64];
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getJablotronBits(fullcode, bs);
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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 = 64;
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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", CmdJablotronDemod, AlwaysAvailable, "Demodulate an Jablotron tag from the GraphBuffer"},
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{"read", CmdJablotronRead, IfPm3Lf, "Attempt to read and extract tag data from the antenna"},
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{"clone", CmdJablotronClone, IfPm3Lf, "clone jablotron tag"},
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{"sim", CmdJablotronSim, IfPm3Lf, "simulate jablotron 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 CmdLFJablotron(const char *Cmd) {
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clearCommandBuffer();
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return CmdsParse(CommandTable, Cmd);
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}
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int getJablotronBits(uint64_t fullcode, uint8_t *bits) {
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//preamp
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num_to_bytebits(0xFFFF, 16, bits);
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//fullcode
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num_to_bytebits(fullcode, 40, bits + 16);
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//chksum byte
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uint8_t chksum = jablontron_chksum(bits);
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num_to_bytebits(chksum, 8, bits + 56);
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return PM3_SUCCESS;
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}
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// ASK/Diphase fc/64 (inverted Biphase)
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// Note: this is not a demod, this is only a detection
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// the parameter *bits needs to be demoded before call
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// 0xFFFF preamble, 64bits
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int detectJablotron(uint8_t *bits, size_t *size) {
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if (*size < 64 * 2) return -1; //make sure buffer has enough data
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size_t startIdx = 0;
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uint8_t preamble[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0};
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if (preambleSearch(bits, preamble, sizeof(preamble), size, &startIdx) == 0)
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return -2; //preamble not found
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if (*size != 64) return -3; // wrong demoded size
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uint8_t checkchksum = jablontron_chksum(bits + startIdx);
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uint8_t crc = bytebits_to_byte(bits + startIdx + 56, 8);
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if (checkchksum != crc) return -5;
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return (int)startIdx;
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}
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int demodJablotron(void) {
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return CmdJablotronDemod("");
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}
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