ADD: finished of the "LF GUARD SIM" command. needs testing.

[proxmark3-svn] / client / cmdlfguard.c

diff --git a/client/cmdlfguard.c b/client/cmdlfguard.c
index 828bdb6827853f4b5a6c3a355d3ab7a318e3d859..05975eea66bc431fc013296a0b323651de699ac1 100644 (file)
--- a/client/cmdlfguard.c
+++ b/client/cmdlfguard.c
@@ -91,12 +91,6 @@ int GetGuardBits(uint32_t fc, uint32_t cn, uint8_t *guardBits) {
        
        if (g_debugMode) printf(" WIE | %s\n", sprint_hex(rawbytes, sizeof(rawbytes))); 
        
-       // NIBBLE_SWAP (works on all data)
-       // for (i = 0; i < 12; ++i)
-               // rawbytes[i] = SWAP_NIBBLE( rawbytes[i] );
-
-       // printf("SWAP | %s\n", sprint_hex(rawbytes, sizeof(rawbytes)));
-       
        // XOR (only works on wiegand stuff)
        for (i = 1; i < 12; ++i)
                rawbytes[i] ^= xorKey ;
@@ -111,7 +105,7 @@ int GetGuardBits(uint32_t fc, uint32_t cn, uint8_t *guardBits) {
        if (g_debugMode) printf(" Raw | %s\n", sprint_bin(pre, 64) );
        
        // add spacer bit 0 every 4 bits, starting with index 0,
-       // 12 bytes, 24 nibbles.  24+1 extra bites. 3bytes.  Ie 9bytes | 1byte xorkey, 8bytes rawdata (64bits, should be enough for a 40bit wiegand)
+       // 12 bytes, 24 nibbles.  24+1 extra bites. 3bytes.  ie 9bytes | 1byte xorkey, 8bytes rawdata (64bits, should be enough for a 40bit wiegand)
        addParity(pre, guardBits+6, 64, 5, 3);
 
        // preamble
@@ -121,10 +115,6 @@ int GetGuardBits(uint32_t fc, uint32_t cn, uint8_t *guardBits) {
        guardBits[3] = 1;
        guardBits[4] = 1;
        guardBits[5] = 0;
-/*               6      B      
-PRE |          0110   1101   0101   1110   0001   1101   1101   0111   1101011011010110110101101101011
-FIN | 111110 0 0110 0 1101 0 0101 0 1110 0 0001 0 1101 0 1101 0 0111 0 110100110011010011001101001100110100110000000000
-*/
        
        if (g_debugMode) printf(" FIN | %s\n", sprint_bin(guardBits, 96) );
        return 1;
@@ -194,16 +184,11 @@ int CmdGuardSim(const char *Cmd) {
        if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_guard_sim();
 
        uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
+       uint8_t clock = 64, encoding = 2, separator = 0, invert = 0;
        
        uint8_t bs[96];
-       size_t size = sizeof(bs);
-       memset(bs, 0x00, size);
+       memset(bs, 0x00, sizeof(bs));
        
-       // Pyramid uses:  ASK Biphase, clk: 32, invert: 0
-       uint64_t arg1, arg2;
-       arg1 = (10 << 8) + 8;
-       arg2 = 32 | 0;
-
        if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_guard_sim();
 
        facilitycode = (fc & 0x000000FF);
@@ -215,9 +200,20 @@ int CmdGuardSim(const char *Cmd) {
        }       
 
        PrintAndLog("Simulating Guardall - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber );
-       
+
+       // Guard uses:  clk: 64, invert: 0, encoding: 2 (ASK Biphase)
+       uint64_t arg1, arg2;
+       arg1 = (clock << 8) | encoding;
+       arg2 = (invert << 8) | separator;
+
+       uint8_t rawbytes[12];
+       size_t size = sizeof(rawbytes);
+       for (uint8_t i=0; i < size; ++i){
+               rawbytes[i] =  bytebits_to_byte( bs + (i*8), 8);
+       }
+
        UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
-       memcpy(c.d.asBytes, bs, size);
+       memcpy(c.d.asBytes, rawbytes, size );
        clearCommandBuffer();
        SendCommand(&c);
        return 0;
@@ -227,7 +223,7 @@ static command_t CommandTable[] = {
     {"help",   CmdHelp,                1, "This help"},
        {"read",        CmdGuardRead,  0, "Attempt to read and extract tag data"},
        {"clone",       CmdGuardClone, 0, "<Facility-Code> <Card Number>  clone Guardall tag"},
-//     {"sim",         CmdGuardSim,   0, "<Facility-Code> <Card Number>  simulate Guardall tag"},
+       {"sim",         CmdGuardSim,   0, "<Facility-Code> <Card Number>  simulate Guardall tag"},
     {NULL, NULL, 0, NULL}
 };