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

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

2 // Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure

3 //

5 //

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

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

8 // the license.

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

10 // Low frequency AWID26 commands

11 //-----------------------------------------------------------------------------

13 #include <stdio.h> // sscanf

 #include "proxmark3.h"  // Definitions, USB controls, etc

 #include "ui.h"         // PrintAndLog

 #include "cmdparser.h"  // CmdsParse, CmdsHelp

 #include "cmdlfawid.h"  // AWID function declarations

 #include "lfdemod.h"    // parityTest

 #include "util.h"       // weigandparity

 #include "protocols.h"  // for T55xx config register definitions

21 #include "cmdmain.h"

 static int CmdHelp(const char *Cmd);

 int usage_lf_awid_fskdemod(void) {

26 PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");

27 PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");

28 PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");

29 PrintAndLog("");

30 PrintAndLog("Usage: lf awid fskdemod ['1']");

31 PrintAndLog("Options : ");

32 PrintAndLog(" 1 : (optional) stop after reading a single card");

33 PrintAndLog("");

34 PrintAndLog("Samples : lf awid fskdemod");

35 PrintAndLog(" : lf awid fskdemod 1");

36 return 0;

37 }

 int usage_lf_awid_sim(void) {

40 PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");

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

42 PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");

43 PrintAndLog("");

44 PrintAndLog("Usage: lf awid sim <Facility-Code> <Card-Number>");

45 PrintAndLog("Options : ");

46 PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");

47 PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");

48 PrintAndLog("");

49 PrintAndLog("Sample : lf awid sim 224 1337");

50 return 0;

51 }

 int usage_lf_awid_clone(void) {

54 PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");

55 PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process.");

56 PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");

57 PrintAndLog("");

58 PrintAndLog("Usage: lf awid clone <Facility-Code> <Card-Number>");

59 PrintAndLog("Options : ");

60 PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");

61 PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");

62 PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");

63 PrintAndLog("");

64 PrintAndLog("Sample : lf awid clone 224 1337");

65 return 0;

66 }

 int CmdAWIDDemodFSK(const char *Cmd) {

69 int findone=0;

         if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod();

         if (Cmd[0] == '1') findone = 1;

         UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};

74 clearCommandBuffer();

75 SendCommand(&c);

76 return 0;

77 }

79 //refactored by marshmellow

 int getAWIDBits(uint32_t fc, uint32_t cn, uint8_t       *AWIDBits) {

81 uint8_t pre[66];

         memset(pre, 0, sizeof(pre));

         AWIDBits[7]=1;

         num_to_bytebits(26, 8, pre);

86 uint8_t wiegand[24];

         num_to_bytebits(fc, 8, wiegand);

         num_to_bytebits(cn, 16, wiegand+8);

         wiegand_add_parity(pre+8, wiegand, 24);

         size_t bitLen = addParity(pre, AWIDBits+8, 66, 4, 1);

         if (bitLen != 88) return 0;

94 //for (uint8_t i = 0; i<3; i++){

95 // PrintAndLog("DEBUG: %08X", bytebits_to_byte(AWIDBits+(32*i),32));

96 //}

97 return 1;

98 }

 int CmdAWIDSim(const char *Cmd) {

         uint32_t fcode = 0, cnum = 0, fc=0, cn=0;

102 uint8_t BitStream[96];

103 uint8_t *bs = BitStream;

         size_t size = sizeof(BitStream);

         memset(bs, 0, size);

106

         uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8

         uint64_t arg2 = 50; // clk RF/50 invert=0

109

         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_sim();

111

112 fcode = (fc & 0x000000FF);

113 cnum = (cn & 0x0000FFFF);

114

         if (fc != fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);

         if (cn != cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);

117

         PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);

119 PrintAndLog("Press pm3-button to abort simulation or run another command");

120

         if (!getAWIDBits(fc, cn, bs)) {

122 PrintAndLog("Error with tag bitstream generation.");

123 return 1;

124 }

125 // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0

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

         memcpy(c.d.asBytes, bs, size);

128 clearCommandBuffer();

129 SendCommand(&c);

130 return 0;

131 }

132

 int CmdAWIDClone(const char *Cmd) {

         uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};

         uint32_t fc=0,cn=0;

136 uint8_t BitStream[96];

137 uint8_t *bs=BitStream;

         memset(bs,0,sizeof(BitStream));

139

         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_clone();

141

         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')

                 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;

144

         if ((fc & 0xFF) != fc) {

146 fc &= 0xFF;

                 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);

148 }

         if ((cn & 0xFFFF) != cn) {

150 cn &= 0xFFFF;

                 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);

152 }

153

         if ( !getAWIDBits(fc, cn, bs)) {

155 PrintAndLog("Error with tag bitstream generation.");

156 return 1;

157 }

158

         blocks[1] = bytebits_to_byte(bs,32);

         blocks[2] = bytebits_to_byte(bs+32,32);

         blocks[3] = bytebits_to_byte(bs+64,32);

162

163 PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u",

164 fc, cn);

165 PrintAndLog("Blk | Data ");

166 PrintAndLog("----+------------");

         PrintAndLog(" 00 | 0x%08x", blocks[0]);

         PrintAndLog(" 01 | 0x%08x", blocks[1]);

         PrintAndLog(" 02 | 0x%08x", blocks[2]);

         PrintAndLog(" 03 | 0x%08x", blocks[3]);

171

172 UsbCommand resp;

         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};

174

         for (uint8_t i=0; i<4; i++) {

176 c.cmd = CMD_T55XX_WRITE_BLOCK;

                 c.arg[0] = blocks[i];

                 c.arg[1] = i;

                 c.arg[2] = 0;

180 clearCommandBuffer();

181 SendCommand(&c);

                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){

183 PrintAndLog("Error occurred, device did not respond during write operation.");

184 return -1;

185 }

186

187 }

188 return 0;

189 }

190

191 static command_t CommandTable[] = {

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

         {"fskdemod",  CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"},

         {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},

         {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> <Q5> -- Clone AWID to T55x7 (tag must be in range of antenna)"},

         {NULL, NULL, 0, NULL}

197 };

198

 int CmdLFAWID(const char *Cmd) {

200 CmdsParse(CommandTable, Cmd);

201 return 0;

202 }

203

 int CmdHelp(const char *Cmd) {

205 CmdsHelp(CommandTable);

206 return 0;

207 }