X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c9ad641b61c6fc5e4b77b181ad9b58b8723f56c6..refs/pull/450/head:/client/cmdlfpyramid.c diff --git a/client/cmdlfpyramid.c b/client/cmdlfpyramid.c index 2494f265..366889f3 100644 --- a/client/cmdlfpyramid.c +++ b/client/cmdlfpyramid.c @@ -5,6 +5,7 @@ // the license. //----------------------------------------------------------------------------- // Low frequency Farpoint / Pyramid tag commands +// FSK2a, rf/50, 128 bits (complete) //----------------------------------------------------------------------------- #include #include @@ -15,7 +16,7 @@ #include "util.h" #include "graph.h" #include "cmdparser.h" -#include "cmddata.h" +#include "cmddata.h" // setDemodBuf + #include "cmdmain.h" #include "cmdlf.h" #include "protocols.h" // for T55xx config register definitions @@ -27,7 +28,7 @@ static int CmdHelp(const char *Cmd); int usage_lf_pyramid_clone(void){ PrintAndLog("clone a Farpointe/Pyramid tag to a T55x7 tag."); PrintAndLog("The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated. "); - PrintAndLog("Currently work only on 26bit"); + PrintAndLog("Currently only works on 26bit"); PrintAndLog(""); PrintAndLog("Usage: lf pyramid clone "); PrintAndLog("Options :"); @@ -85,9 +86,149 @@ int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) { return 1; } +//by marshmellow +//Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream) +//print full Farpointe Data/Pyramid Prox ID and some bit format details if found +int CmdFSKdemodPyramid(const char *Cmd) +{ + //raw fsk demod no manchester decoding no start bit finding just get binary from wave + uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; + size_t size = getFromGraphBuf(BitStream); + if (size==0) return 0; + + int waveIdx=0; + //get binary from fsk wave + int idx = PyramiddemodFSK(BitStream, &size, &waveIdx); + if (idx < 0){ + if (g_debugMode){ + if (idx == -5) + PrintAndLog("DEBUG: Error - not enough samples"); + else if (idx == -1) + PrintAndLog("DEBUG: Error - only noise found"); + else if (idx == -2) + PrintAndLog("DEBUG: Error - problem during FSK demod"); + else if (idx == -3) + PrintAndLog("DEBUG: Error - Size not correct: %d", size); + else if (idx == -4) + PrintAndLog("DEBUG: Error - Pyramid preamble not found"); + else + PrintAndLog("DEBUG: Error - idx: %d",idx); + } + return 0; + } + // Index map + // 0 10 20 30 40 50 60 + // | | | | | | | + // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 + // ----------------------------------------------------------------------------- + // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 + // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o + + // 64 70 80 90 100 110 120 + // | | | | | | | + // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 + // ----------------------------------------------------------------------------- + // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0 + // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o + // |---115---||---------71---------| + // s = format start bit, o = odd parity of last 7 bits + // f = facility code, c = card number + // w = wiegand parity, x = extra space for other formats + // p = unknown checksum + // (26 bit format shown) + + //get bytes for checksum calc + uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8); + uint8_t csBuff[14] = {0x00}; + for (uint8_t i = 0; i < 13; i++){ + csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8); + } + //check checksum calc + //checksum calc thanks to ICEMAN!! + uint32_t checkCS = CRC8Maxim(csBuff,13); + + //get raw ID before removing parities + uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32); + uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32); + uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32); + uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32); + setDemodBuf(BitStream,128,idx); + setClockGrid(50, waveIdx + (idx*50)); + + size = removeParity(BitStream, idx+8, 8, 1, 120); + if (size != 105){ + if (g_debugMode) + PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3); + return 0; + } + + // ok valid card found! + + // Index map + // 0 10 20 30 40 50 60 70 + // | | | | | | | | + // 01234567890123456789012345678901234567890123456789012345678901234567890 + // ----------------------------------------------------------------------- + // 00000000000000000000000000000000000000000000000000000000000000000000000 + // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + + // 71 80 90 100 + // | | | | + // 1 2 34567890 1234567890123456 7 8901234 + // --------------------------------------- + // 1 1 01110011 0000000001000110 0 1001010 + // s w ffffffff cccccccccccccccc w ppppppp + // |--115-| |------71------| + // s = format start bit, o = odd parity of last 7 bits + // f = facility code, c = card number + // w = wiegand parity, x = extra space for other formats + // p = unknown checksum + // (26 bit format shown) + + //find start bit to get fmtLen + int j; + for (j=0; j32){ + //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32); + //code2 = bytebits_to_byte(BitStream+(size-32),32); + PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo); + } else{ + //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen); + PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo); + } + } + if (checksum == checkCS) + PrintAndLog("Checksum %02x passed", checksum); + else + PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS); + + if (g_debugMode){ + PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128); + printDemodBuff(); + } + return 1; +} + int CmdPyramidRead(const char *Cmd) { - CmdLFRead("s"); - getSamples("30000",false); + lf_read(true, 15000); return CmdFSKdemodPyramid(""); } @@ -181,10 +322,11 @@ int CmdPyramidSim(const char *Cmd) { } static command_t CommandTable[] = { - {"help", CmdHelp, 1, "This help"}, - {"read", CmdPyramidRead, 0, "Attempt to read and extract tag data"}, - {"clone", CmdPyramidClone, 0, " clone pyramid tag"}, - {"sim", CmdPyramidSim, 0, " simulate pyramid tag"}, + {"help", CmdHelp, 1, "This help"}, + {"demod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from the GraphBuffer"}, + {"read", CmdPyramidRead, 0, "Attempt to read and extract tag data"}, + {"clone", CmdPyramidClone, 0, " clone pyramid tag"}, + {"sim", CmdPyramidSim, 0, " simulate pyramid tag"}, {NULL, NULL, 0, NULL} };