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