mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-11 18:33:18 +08:00
374 lines
15 KiB
C
374 lines
15 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 Farpoint / Pyramid tag commands
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// FSK2a, rf/50, 128 bits (complete)
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//-----------------------------------------------------------------------------
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#include "cmdlfpyramid.h"
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static int CmdHelp(const char *Cmd);
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static int usage_lf_pyramid_clone(void) {
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PrintAndLogEx(NORMAL, "clone a Farpointe/Pyramid tag to a T55x7 tag.");
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PrintAndLogEx(NORMAL, "The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated. ");
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PrintAndLogEx(NORMAL, "Currently only works on 26bit");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Usage: lf pyramid clone [h] <Facility-Code> <Card-Number> [Q5]");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h : this help");
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PrintAndLogEx(NORMAL, " <Facility-Code> : 8-bit value facility code");
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PrintAndLogEx(NORMAL, " <Card Number> : 16-bit value card number");
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PrintAndLogEx(NORMAL, " Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " lf pyramid clone 123 11223");
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return 0;
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}
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static int usage_lf_pyramid_sim(void) {
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PrintAndLogEx(NORMAL, "Enables simulation of Farpointe/Pyramid 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, "The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
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PrintAndLogEx(NORMAL, "Currently work only on 26bit");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Usage: lf pyramid sim [h] <Facility-Code> <Card-Number>");
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PrintAndLogEx(NORMAL, "Options:");
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PrintAndLogEx(NORMAL, " h : this help");
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PrintAndLogEx(NORMAL, " <Facility-Code> : 8-bit value facility code");
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PrintAndLogEx(NORMAL, " <Card Number> : 16-bit value card number");
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PrintAndLogEx(NORMAL, "");
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PrintAndLogEx(NORMAL, "Examples:");
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PrintAndLogEx(NORMAL, " lf pyramid sim 123 11223");
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return 0;
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}
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//by marshmellow
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//Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
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//print full Farpointe Data/Pyramid Prox ID and some bit format details if found
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static int CmdPyramidDemod(const char *Cmd) {
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(void)Cmd; // Cmd is not used so far
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//raw fsk demod no manchester decoding no start bit finding just get binary from wave
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uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0};
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size_t size = getFromGraphBuf(bits);
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if (size == 0) {
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid not enough samples");
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return 0;
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}
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//get binary from fsk wave
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int waveIdx = 0;
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int idx = detectPyramid(bits, &size, &waveIdx);
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if (idx < 0) {
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if (idx == -1)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: not enough samples");
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else if (idx == -2)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: only noise found");
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else if (idx == -3)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: problem during FSK demod");
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else if (idx == -4)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: preamble not found");
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else if (idx == -5)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: size not correct: %d", size);
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else
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: error demoding fsk idx: %d", idx);
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return 0;
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}
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setDemodBuff(bits, size, idx);
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setClockGrid(50, waveIdx + (idx * 50));
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// Index map
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// 0 10 20 30 40 50 60
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// | | | | | | |
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// 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
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// -----------------------------------------------------------------------------
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// 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
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// premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
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// 64 70 80 90 100 110 120
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// | | | | | | |
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// 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
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// -----------------------------------------------------------------------------
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// 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
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// xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
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// |---115---||---------71---------|
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// s = format start bit, o = odd parity of last 7 bits
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// f = facility code, c = card number
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// w = wiegand parity, x = extra space for other formats
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// p = CRC8maxim checksum
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// (26 bit format shown)
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//get bytes for checksum calc
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uint8_t checksum = bytebits_to_byte(bits + idx + 120, 8);
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uint8_t csBuff[14] = {0x00};
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for (uint8_t i = 0; i < 13; i++) {
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csBuff[i] = bytebits_to_byte(bits + idx + 16 + (i * 8), 8);
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}
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//check checksum calc
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//checksum calc thanks to ICEMAN!!
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uint32_t checkCS = CRC8Maxim(csBuff, 13);
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//get raw ID before removing parities
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uint32_t rawLo = bytebits_to_byte(bits + idx + 96, 32);
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uint32_t rawHi = bytebits_to_byte(bits + idx + 64, 32);
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uint32_t rawHi2 = bytebits_to_byte(bits + idx + 32, 32);
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uint32_t rawHi3 = bytebits_to_byte(bits + idx, 32);
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size = removeParity(bits, idx + 8, 8, 1, 120);
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if (size != 105) {
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if (size == 0)
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: parity check failed - IDX: %d, hi3: %08X", idx, rawHi3);
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else
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PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %08X", size, idx, rawHi3);
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return 0;
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}
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// ok valid card found!
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// Index map
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// 0 10 20 30 40 50 60 70
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// | | | | | | | |
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// 01234567890123456789012345678901234567890123456789012345678901234567890
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// -----------------------------------------------------------------------
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// 00000000000000000000000000000000000000000000000000000000000000000000000
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// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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// 71 80 90 100
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// | | | |
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// 1 2 34567890 1234567890123456 7 8901234
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// ---------------------------------------
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// 1 1 01110011 0000000001000110 0 1001010
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// s w ffffffff cccccccccccccccc w ppppppp
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// |--115-| |------71------|
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// s = format start bit, o = odd parity of last 7 bits
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// f = facility code, c = card number
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// w = wiegand parity, x = extra space for other formats
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// p = CRC8-Maxim checksum
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// (26 bit format shown)
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//find start bit to get fmtLen
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int j;
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for (j = 0; j < size; ++j) {
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if (bits[j]) break;
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}
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uint8_t fmtLen = size - j - 8;
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uint32_t fc, cardnum, code1;
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if (fmtLen == 26) {
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fc = bytebits_to_byte(bits + 73, 8);
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cardnum = bytebits_to_byte(bits + 81, 16);
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code1 = bytebits_to_byte(bits + 72, fmtLen);
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PrintAndLogEx(SUCCESS, "Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi3, rawHi2, rawHi, rawLo);
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} else if (fmtLen == 45) {
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fmtLen = 42; //end = 10 bits not 7 like 26 bit fmt
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fc = bytebits_to_byte(bits + 53, 10);
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cardnum = bytebits_to_byte(bits + 63, 32);
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PrintAndLogEx(SUCCESS, "Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
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/*
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} else if (fmtLen > 32) {
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cardnum = bytebits_to_byte(bits + 81, 16);
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//code1 = bytebits_to_byte(bits+(size-fmtLen),fmtLen-32);
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//code2 = bytebits_to_byte(bits+(size-32),32);
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PrintAndLogEx(SUCCESS, "Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
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*/
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} else {
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cardnum = bytebits_to_byte(bits + 81, 16);
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//code1 = bytebits_to_byte(bits+(size-fmtLen),fmtLen);
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PrintAndLogEx(SUCCESS, "Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
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}
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PrintAndLogEx(DEBUG, "DEBUG: Pyramid: checksum : 0x%02X - %02X - %s"
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, checksum
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, checkCS
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, (checksum == checkCS) ? _GREEN_("Passed") : _RED_("Fail")
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);
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PrintAndLogEx(DEBUG, "DEBUG: Pyramid: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
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if (g_debugMode)
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printDemodBuff();
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return 1;
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}
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static int CmdPyramidRead(const char *Cmd) {
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lf_read(true, 15000);
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return CmdPyramidDemod(Cmd);
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}
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static int CmdPyramidClone(const char *Cmd) {
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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_pyramid_clone();
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uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
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uint32_t blocks[5];
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uint8_t bs[128];
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memset(bs, 0x00, sizeof(bs));
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if (sscanf(Cmd, "%u %u", &fc, &cn) != 2) return usage_lf_pyramid_clone();
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facilitycode = (fc & 0x000000FF);
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cardnumber = (cn & 0x0000FFFF);
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if (!getPyramidBits(facilitycode, cardnumber, bs)) {
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PrintAndLogEx(WARNING, "Error with tag bitstream generation.");
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return 1;
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}
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//Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks
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blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4 << T55x7_MAXBLOCK_SHIFT;
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// Q5
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if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q')
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blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | T5555_SET_BITRATE(50) | 4 << T5555_MAXBLOCK_SHIFT;
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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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PrintAndLogEx(INFO, "Preparing to clone Farpointe/Pyramid to T55x7 with Facility Code: %u, Card Number: %u", facilitycode, cardnumber);
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print_blocks(blocks, 5);
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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 < 5; i++) {
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if (i == 4) {
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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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t55xx_write_block_t ng;
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ng.data = blocks[i];
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ng.pwd = 0;
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ng.blockno = i;
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ng.flags = 0;
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SendCommandNG(CMD_T55XX_WRITE_BLOCK, (uint8_t *)&ng, sizeof(ng));
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if (!WaitForResponseTimeout(CMD_T55XX_WRITE_BLOCK, &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 CmdPyramidSim(const char *Cmd) {
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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_pyramid_sim();
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uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
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uint8_t bs[128];
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memset(bs, 0x00, sizeof(bs));
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// Pyramid uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
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uint8_t clk = 50, invert = 0, high = 10, low = 8;
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if (sscanf(Cmd, "%u %u", &fc, &cn) != 2) return usage_lf_pyramid_sim();
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facilitycode = (fc & 0x000000FF);
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cardnumber = (cn & 0x0000FFFF);
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if (!getPyramidBits(facilitycode, cardnumber, bs)) {
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PrintAndLogEx(WARNING, "Error with tag bitstream generation.");
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return 1;
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}
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PrintAndLogEx(SUCCESS, "Simulating Farpointe/Pyramid - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber);
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clearCommandBuffer();
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SendCommandOLD(CMD_FSK_SIM_TAG, high << 8 | low, invert << 8 | clk, sizeof(bs), bs, sizeof(bs));
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PacketResponseNG resp;
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WaitForResponse(CMD_FSK_SIM_TAG, &resp);
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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", CmdPyramidDemod, AlwaysAvailable, "demodulate a Pyramid FSK tag from the GraphBuffer"},
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{"read", CmdPyramidRead, IfPm3Lf, "attempt to read and extract tag data"},
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{"clone", CmdPyramidClone, IfPm3Lf, "clone pyramid tag"},
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{"sim", CmdPyramidSim, IfPm3Lf, "simulate pyramid tag"},
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{NULL, NULL, NULL, NULL}
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};
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int CmdLFPyramid(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 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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// Works for 26bits.
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int getPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {
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uint8_t pre[128];
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memset(pre, 0x00, sizeof(pre));
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// format start bit
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pre[79] = 1;
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// Get 26 wiegand from FacilityCode, CardNumber
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uint8_t wiegand[24];
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memset(wiegand, 0x00, sizeof(wiegand));
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num_to_bytebits(fc, 8, wiegand);
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num_to_bytebits(cn, 16, wiegand + 8);
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// add wiegand parity bits (dest, source, len)
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wiegand_add_parity(pre + 80, wiegand, 24);
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// add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
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addParity(pre + 8, pyramidBits + 8, 102, 8, 1);
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// add checksum
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uint8_t csBuff[13];
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for (uint8_t i = 0; i < 13; i++)
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csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i * 8), 8);
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uint32_t crc = CRC8Maxim(csBuff, 13);
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num_to_bytebits(crc, 8, pyramidBits + 120);
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return 1;
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}
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int demodPyramid(void) {
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return CmdPyramidDemod("");
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}
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// by marshmellow
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// FSK Demod then try to locate a Farpointe Data (pyramid) ID
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int detectPyramid(uint8_t *dest, size_t *size, int *waveStartIdx) {
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//make sure buffer has data
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if (*size < 128 * 50) return -1;
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//test samples are not just noise
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if (getSignalProperties()->isnoise) return -2;
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// FSK demodulator RF/50 FSK 10,8
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*size = fskdemod(dest, *size, 50, 1, 10, 8, waveStartIdx); // pyramid fsk2
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//did we get a good demod?
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if (*size < 128) return -3;
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size_t startIdx = 0;
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uint8_t preamble[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1};
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if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx))
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return -4; //preamble not found
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// wrong size? (between to preambles)
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if (*size != 128) return -5;
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return (int)startIdx;
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}
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