mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-20 15:26:13 +08:00
245 lines
7.6 KiB
C
245 lines
7.6 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 KERI tag commands
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// PSK1, RF/128, RF/2, 64 bits long
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//-----------------------------------------------------------------------------
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#include "cmdlfkeri.h"
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static int CmdHelp(const char *Cmd);
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static int usage_lf_keri_clone(void) {
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PrintAndLogEx(NORMAL, "clone a KERI tag to a T55x7 tag.");
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PrintAndLogEx(NORMAL, "Usage: lf keri clone [h] <id> <Q5>");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h : This help");
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PrintAndLogEx(NORMAL, " <id> : Keri Internal 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 keri clone 112233");
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return 0;
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}
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static int usage_lf_keri_sim(void) {
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PrintAndLogEx(NORMAL, "Enables simulation of KERI 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 keri sim [h] <id>");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h : This help");
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PrintAndLogEx(NORMAL, " <id> : Keri Internal ID");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " lf keri sim 112233");
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return 0;
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}
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static int CmdKeriDemod(const char *Cmd) {
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(void)Cmd; // Cmd is not used so far
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if (!PSKDemod("", false)) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - KERI: PSK1 Demod failed");
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return 0;
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}
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bool invert = false;
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size_t size = DemodBufferLen;
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int idx = detectKeri(DemodBuffer, &size, &invert);
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if (idx < 0) {
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if (idx == -1)
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PrintAndLogEx(DEBUG, "DEBUG: Error - KERI: too few bits found");
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else if (idx == -2)
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PrintAndLogEx(DEBUG, "DEBUG: Error - KERI: preamble not found");
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else if (idx == -3)
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PrintAndLogEx(DEBUG, "DEBUG: Error - KERI: Size not correct: 64 != %d", size);
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else
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PrintAndLogEx(DEBUG, "DEBUG: Error - KERI: ans: %d", idx);
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return 0;
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}
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setDemodBuff(DemodBuffer, size, idx);
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setClockGrid(g_DemodClock, g_DemodStartIdx + (idx * 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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//get internal id
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uint32_t ID = bytebits_to_byte(DemodBuffer + 29, 32);
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ID &= 0x7FFFFFFF;
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/*
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000000000000000000000000000001XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX111
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^1###############################^^^
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Preamble block 29 bits of ZEROS
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32 bit Internal ID (First bit always 1)
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3 bit of 1s in the end
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How this is decoded to Facility ID, Card number is unknown
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Facility ID = 0-31 (indicates 5 bits)
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Card number = up to 10 digits
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Might be a hash of FC & CN to generate Internal ID
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*/
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PrintAndLogEx(SUCCESS, "KERI Tag Found -- Internal ID: %u", ID);
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PrintAndLogEx(SUCCESS, "Raw: %08X%08X", raw1, raw2);
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if (invert) {
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PrintAndLogEx(INFO, "Had to Invert - probably KERI");
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for (size_t i = 0; i < size; i++)
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DemodBuffer[i] ^= 1;
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CmdPrintDemodBuff("x");
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}
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return 1;
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}
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static int CmdKeriRead(const char *Cmd) {
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lf_read(true, 10000);
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return CmdKeriDemod(Cmd);
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}
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static int CmdKeriClone(const char *Cmd) {
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uint32_t internalid = 0;
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uint32_t blocks[3] = {
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T55x7_TESTMODE_DISABLED |
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T55x7_X_MODE |
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T55x7_MODULATION_PSK1 |
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T55x7_PSKCF_RF_2 |
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2 << T55x7_MAXBLOCK_SHIFT,
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0,
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0
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};
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// dynamic bitrate used
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blocks[0] |= 0xF << 18;
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char cmdp = tolower(param_getchar(Cmd, 0));
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if (strlen(Cmd) == 0 || cmdp == 'h') return usage_lf_keri_clone();
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internalid = param_get32ex(Cmd, 0, 0, 10);
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//Q5
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if (tolower(param_getchar(Cmd, 1)) == 'q') {
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blocks[0] =
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T5555_MODULATION_PSK1 |
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T5555_SET_BITRATE(128) |
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T5555_PSK_RF_2 |
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2 << T5555_MAXBLOCK_SHIFT;
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}
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// MSB is ONE
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internalid |= 0x80000000;
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// 3 LSB is ONE
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uint64_t data = ((uint64_t)internalid << 3) + 7;
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PrintAndLogEx(INFO, "Preparing to clone KERI to T55x7 with Internal Id: %" PRIx64, internalid);
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//
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blocks[1] = data >> 32;
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blocks[2] = data & 0xFFFFFFFF;
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print_blocks(blocks, 3);
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PacketResponseNG resp;
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// fast push mode
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conn.block_after_ACK = true;
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for (uint8_t i = 0; i < 3; i++) {
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if (i == 2) {
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// Disable fast mode on last packet
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conn.block_after_ACK = false;
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}
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clearCommandBuffer();
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SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
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if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
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PrintAndLogEx(WARNING, "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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static int CmdKeriSim(const char *Cmd) {
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char cmdp = tolower(param_getchar(Cmd, 0));
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if (strlen(Cmd) == 0 || cmdp == 'h') return usage_lf_keri_sim();
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uint64_t internalid = param_get32ex(Cmd, 0, 0, 10);
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internalid |= 0x80000000;
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internalid <<= 3;
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internalid += 7;
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uint8_t bits[64] = {0x00};
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// loop to bits
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uint8_t j = 0;
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for (int8_t i = 63; i >= 0; --i) {
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bits[j++] = ((internalid >> i) & 1);
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}
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uint8_t clk = 32, carrier = 2, invert = 0;
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PrintAndLogEx(SUCCESS, "Simulating KERI - Internal Id: %u", internalid);
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clearCommandBuffer();
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SendCommandOLD(CMD_PSK_SIM_TAG, clk << 8 | carrier, invert, sizeof(bits), bits, sizeof(bits));
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return 0;
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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", CmdKeriDemod, AlwaysAvailable, "Demodulate an KERI tag from the GraphBuffer"},
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{"read", CmdKeriRead, IfPm3Lf, "Attempt to read and extract tag data from the antenna"},
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{"clone", CmdKeriClone, IfPm3Lf, "clone KERI to T55x7"},
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{"sim", CmdKeriSim, IfPm3Lf, "simulate KERI 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 0;
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}
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int CmdLFKeri(const char *Cmd) {
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clearCommandBuffer();
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return CmdsParse(CommandTable, Cmd);
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}
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// find KERI preamble in already demoded data
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int detectKeri(uint8_t *dest, size_t *size, bool *invert) {
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uint8_t preamble[] = {1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
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uint8_t preamble_i[] = {0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0};
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// sanity check.
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if (*size < sizeof(preamble) + 100) return -1;
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size_t startIdx = 0;
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if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx)) {
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// if didn't find preamble try again inverting
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if (!preambleSearch(DemodBuffer, preamble_i, sizeof(preamble_i), size, &startIdx))
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return -2;
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*invert ^= 1;
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}
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if (*size != 64) return -3; //wrong demoded size
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return (int)startIdx;
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}
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int demodKeri(void) {
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return CmdKeriDemod("");
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}
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