git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdhficlass.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>, Hagen Fritsch
   3 // Copyright (C) 2011 Gerhard de Koning Gans
   4 //
   5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   6 // at your option, any later version. See the LICENSE.txt file for the text of
   7 // the license.
   8 //-----------------------------------------------------------------------------
   9 // High frequency iClass commands
  10 //-----------------------------------------------------------------------------
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include "iso14443crc.h" // Can also be used for iClass, using 0xE012 as CRC-type
  16 #include "data.h"
  17 #include "proxusb.h"
  18 #include "proxmark3.h"
  19 #include "ui.h"
  20 #include "cmdparser.h"
  21 #include "cmdhficlass.h"
  22 #include "common.h"
  23 #include "util.h"
  24
  25 static int CmdHelp(const char *Cmd);
  26
  27 int CmdHFiClassList(const char *Cmd)
  28 {
  29   uint8_t got[1920];
  30   GetFromBigBuf(got,sizeof(got),0);
  31
  32   PrintAndLog("recorded activity:");
  33   PrintAndLog(" ETU     :rssi: who bytes");
  34   PrintAndLog("---------+----+----+-----------");
  35
  36   int i = 0;
  37   int prev = -1;
  38
  39   for (;;) {
  40     if(i >= 1900) {
  41       break;
  42     }
  43
  44     bool isResponse;
  45     int timestamp = *((uint32_t *)(got+i));
  46     if (timestamp & 0x80000000) {
  47       timestamp &= 0x7fffffff;
  48       isResponse = 1;
  49     } else {
  50       isResponse = 0;
  51     }
  52
  53     int metric = 0;
  54     int parityBits = *((uint32_t *)(got+i+4));
  55     // 4 bytes of additional information...
  56     // maximum of 32 additional parity bit information
  57     //
  58     // TODO:
  59     // at each quarter bit period we can send power level (16 levels)
  60     // or each half bit period in 256 levels.
  61
  62
  63     int len = got[i+8];
  64
  65     if (len > 100) {
  66       break;
  67     }
  68     if (i + len >= 1900) {
  69       break;
  70     }
  71
  72     uint8_t *frame = (got+i+9);
  73
  74     // Break and stick with current result if buffer was not completely full
  75     if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
  76
  77     char line[1000] = "";
  78     int j;
  79     for (j = 0; j < len; j++) {
  80       int oddparity = 0x01;
  81       int k;
  82
  83       for (k=0;k<8;k++) {
  84         oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
  85       }
  86
  87       //if((parityBits >> (len - j - 1)) & 0x01) {
  88       if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
  89         sprintf(line+(j*4), "%02x!  ", frame[j]);
  90       }
  91       else {
  92         sprintf(line+(j*4), "%02x   ", frame[j]);
  93       }
  94     }
  95
  96     char *crc;
  97     crc = "";
  98     if (len > 2) {
  99       uint8_t b1, b2;
 100       for (j = 0; j < (len - 1); j++) {
 101         // gives problems... search for the reason..
 102         /*if(frame[j] == 0xAA) {
 103           switch(frame[j+1]) {
 104             case 0x01:
 105               crc = "[1] Two drops close after each other";
 106             break;
 107             case 0x02:
 108               crc = "[2] Potential SOC with a drop in second half of bitperiod";
 109               break;
 110             case 0x03:
 111               crc = "[3] Segment Z after segment X is not possible";
 112               break;
 113             case 0x04:
 114               crc = "[4] Parity bit of a fully received byte was wrong";
 115               break;
 116             default:
 117               crc = "[?] Unknown error";
 118               break;
 119           }
 120           break;
 121         }*/
 122       }
 123
 124       if (strlen(crc)==0) {
 125         if(!isResponse && len == 4) {
 126                 // Rough guess that this is a command from the reader
 127                 // For iClass the command byte is not part of the CRC
 128                 ComputeCrc14443(CRC_ICLASS, &frame[1], len-3, &b1, &b2);
 129         }
 130         else {
 131                 // For other data.. CRC might not be applicable (UPDATE commands etc.)
 132                 ComputeCrc14443(CRC_ICLASS, frame, len-2, &b1, &b2);
 133         }
 134         //printf("%1x %1x",(unsigned)b1,(unsigned)b2);
 135         if (b1 != frame[len-2] || b2 != frame[len-1]) {
 136           crc = (isResponse & (len < 8)) ? "" : " !crc";
 137         } else {
 138           crc = "";
 139         }
 140       }
 141     } else {
 142       crc = ""; // SHORT
 143     }
 144
 145     char metricString[100];
 146     if (isResponse) {
 147       sprintf(metricString, "%3d", metric);
 148     } else {
 149       strcpy(metricString, "   ");
 150     }
 151
 152     PrintAndLog(" +%7d: %s: %s %s %s",
 153       (prev < 0 ? 0 : (timestamp - prev)),
 154       metricString,
 155       (isResponse ? "TAG" : "   "), line, crc);
 156
 157     prev = timestamp;
 158     i += (len + 9);
 159   }
 160   return 0;
 161 }
 162
 163 /*void iso14a_set_timeout(uint32_t timeout) {
 164         UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_SET_TIMEOUT, 0, timeout}};
 165         SendCommand(&c);
 166 }*/
 167
 168 int CmdHFiClassSnoop(const char *Cmd)
 169 {
 170   UsbCommand c = {CMD_SNOOP_ICLASS};
 171   SendCommand(&c);
 172   return 0;
 173 }
 174
 175 int CmdHFiClassSim(const char *Cmd)
 176 {
 177   uint8_t simType = 0;
 178   uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
 179
 180   if (strlen(Cmd)<2) {
 181         PrintAndLog("Usage:  hf iclass sim    <sim type> <CSN (16 hex symbols)>");
 182         PrintAndLog("        sample: hf iclass sim 0 031FEC8AF7FF12E0");
 183         return 0;
 184   }
 185
 186   simType = param_get8(Cmd, 0);
 187   if (param_gethex(Cmd, 1, CSN, 16)) {
 188         PrintAndLog("A CSN should consist of 16 HEX symbols");
 189         return 1;
 190   }
 191   PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
 192
 193   UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType}};
 194   memcpy(c.d.asBytes, CSN, 8);
 195   SendCommand(&c);
 196
 197   /*UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500);
 198   if (resp != NULL) {
 199         uint8_t                isOK  = resp->arg[0] & 0xff;
 200         PrintAndLog("isOk:%02x", isOK);
 201   } else {
 202         PrintAndLog("Command execute timeout");
 203   }*/
 204
 205   return 0;
 206 }
 207
 208 int CmdHFiClassReader(const char *Cmd)
 209 {
 210   uint8_t readerType = 0;
 211
 212   if (strlen(Cmd)<1) {
 213         PrintAndLog("Usage:  hf iclass reader    <reader type>");
 214         PrintAndLog("        sample: hf iclass reader 0");
 215         return 0;
 216   }
 217
 218   readerType = param_get8(Cmd, 0);
 219   PrintAndLog("--readertype:%02x", readerType);
 220
 221   UsbCommand c = {CMD_READER_ICLASS, {readerType}};
 222   //memcpy(c.d.asBytes, CSN, 8);
 223   SendCommand(&c);
 224
 225   /*UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500);
 226   if (resp != NULL) {
 227         uint8_t                isOK  = resp->arg[0] & 0xff;
 228         PrintAndLog("isOk:%02x", isOK);
 229   } else {
 230         PrintAndLog("Command execute timeout");
 231   }*/
 232
 233   return 0;
 234 }
 235
 236 static command_t CommandTable[] =
 237 {
 238   {"help",    CmdHelp,        1, "This help"},
 239   {"list",    CmdHFiClassList,   0, "List iClass history"},
 240   {"snoop",   CmdHFiClassSnoop,  0, "Eavesdrop iClass communication"},
 241   {"sim",     CmdHFiClassSim,    0, "Simulate iClass tag"},
 242   {"reader",  CmdHFiClassReader, 0, "Read an iClass tag"},
 243   {NULL, NULL, 0, NULL}
 244 };
 245
 246 int CmdHFiClass(const char *Cmd)
 247 {
 248   CmdsParse(CommandTable, Cmd);
 249   return 0;
 250 }
 251
 252 int CmdHelp(const char *Cmd)
 253 {
 254   CmdsHelp(CommandTable);
 255   return 0;
 256 }