git.zerfleddert.de Git - proxmark3-svn/blob

1 //-----------------------------------------------------------------------------

2 //

3 // This code is licensed to you under the terms of the GNU GPL, version 2 or,

4 // at your option, any later version. See the LICENSE.txt file for the text of

5 // the license.

6 //-----------------------------------------------------------------------------

7 // Low frequency Viking tag commands (AKA FDI Matalec Transit)

8 // ASK/Manchester, RF/32, 64 bits (complete)

9 //-----------------------------------------------------------------------------

10 #include <stdio.h>

11 #include <string.h>

12 #include <inttypes.h>

13 #include "proxmark3.h"

14 #include "cmdlfviking.h"

15 #include "ui.h"

16 #include "util.h"

17 #include "graph.h"

18 #include "cmdparser.h"

19 #include "cmddata.h"

20 #include "cmdmain.h"

21 #include "cmdlf.h"

22 #include "lfdemod.h"

 static int CmdHelp(const char *Cmd);

 int usage_lf_viking_clone(void) {

26 PrintAndLog("clone a Viking AM tag to a T55x7 tag.");

27 PrintAndLog("Usage: lf viking clone <Card ID - 8 hex digits> <Q5>");

28 PrintAndLog("Options :");

29 PrintAndLog(" <Card Number> : 8 digit hex viking card number");

30 PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");

31 PrintAndLog("");

32 PrintAndLog("Sample : lf viking clone 1A337 Q5");

33 return 0;

34 }

 int usage_lf_viking_sim(void) {

37 PrintAndLog("Enables simulation of viking card with specified card number.");

38 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");

39 PrintAndLog("Per viking format, the card number is 8 digit hex number. Larger values are truncated.");

40 PrintAndLog("");

41 PrintAndLog("Usage: lf viking sim <Card-Number>");

42 PrintAndLog("Options :");

43 PrintAndLog(" <Card Number> : 8 digit hex viking card number");

44 PrintAndLog("");

45 PrintAndLog("Sample : lf viking sim 1A337");

46 return 0;

47 }

 uint64_t getVikingBits(uint32_t id) {

50 //calc checksum

         uint8_t checksum = ((id>>24) & 0xFF) ^ ((id>>16) & 0xFF) ^ ((id>>8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;

         return ((uint64_t)0xF2 << 56) | ((uint64_t)id << 8) | checksum;

53 }

55 //by marshmellow

56 //see ASKDemod for what args are accepted

 int CmdVikingDemod(const char *Cmd) {

         if (!ASKDemod(Cmd, false, false, 1)) {

                 if (g_debugMode) PrintAndLog("ASKDemod failed");

60 return 0;

61 }

62 size_t size = DemodBufferLen;

63 //call lfdemod.c demod for Viking

         int ans = VikingDemod_AM(DemodBuffer, &size);

         if (ans < 0) {

                 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);

67 return 0;

68 }

69 //got a good demod

         uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);

         uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);

         uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);

         uint8_t  checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);

         PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);

         PrintAndLog("Raw: %08X%08X", raw1,raw2);

         setDemodBuf(DemodBuffer, 64, ans);

         setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));

78 return 1;

79 }

81 //by marshmellow

82 //see ASKDemod for what args are accepted

 int CmdVikingRead(const char *Cmd) {

84 // read lf silently

         lf_read(true, 10000);

86 // demod and output viking ID

87 return CmdVikingDemod(Cmd);

88 }

 int CmdVikingClone(const char *Cmd) {

91 uint32_t id = 0;

92 uint64_t rawID = 0;

93 bool Q5 = false;

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();

         id = param_get32ex(Cmd, 0, 0, 16);

         if (id == 0) return usage_lf_viking_clone();

         if (param_getchar(Cmd, 1)=='Q' || param_getchar(Cmd, 1)=='q')

100 Q5 = true;

101

102 rawID = getVikingBits(id);

         PrintAndLog("Cloning - ID: %08X, Raw: %08X%08X",id,(uint32_t)(rawID >> 32),(uint32_t) (rawID & 0xFFFFFFFF));

         UsbCommand c = {CMD_VIKING_CLONE_TAG,{rawID >> 32, rawID & 0xFFFFFFFF, Q5}};

105 clearCommandBuffer();

106 SendCommand(&c);

107 //check for ACK

108 WaitForResponse(CMD_ACK,NULL);

109 return 0;

110 }

111

 int CmdVikingSim(const char *Cmd) {

113 uint32_t id = 0;

114 uint64_t rawID = 0;

         uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;

         char cmdp = param_getchar(Cmd, 0);

117

         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();

         id = param_get32ex(Cmd, 0, 0, 16);

         if (id == 0) return usage_lf_viking_sim();

121

122 rawID = getVikingBits(id);

123

124 uint16_t arg1, arg2;

125 size_t size = 64;

   arg1 = clk << 8 | encoding;

   arg2 = invert << 8 | separator;

128

   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};

   PrintAndLog("preparing to sim ask data: %d bits", size);

   num_to_bytebits(rawID, 64, c.d.asBytes);

132 clearCommandBuffer();

133 SendCommand(&c);

134 return 0;

135 }

136

137 static command_t CommandTable[] = {

         {"help",  CmdHelp,        1, "This help"},

         {"demod", CmdVikingDemod, 1, "Demodulate a Viking tag from the GraphBuffer"},

         {"read",  CmdVikingRead,  0, "Attempt to read and Extract tag data from the antenna"},

         {"clone", CmdVikingClone, 0, "<8 digit ID number> clone viking tag"},

         {"sim",   CmdVikingSim,   0, "<8 digit ID number> simulate viking tag"},

         {NULL, NULL, 0, NULL}

144 };

145

 int CmdLFViking(const char *Cmd) {

147 CmdsParse(CommandTable, Cmd);

148 return 0;

149 }

150

 int CmdHelp(const char *Cmd) {

152 CmdsHelp(CommandTable);

153 return 0;

154 }