More work on iclass simulation attack

[proxmark3-svn] / armsrc / iclass.c

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index 117e4035af7ec7290b55861de73f9ff6d6b942bb..be27aa3ad6d11ed9f13fd8c2b7f4c7e22a3624bc 100644 (file)
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -954,7 +954,7 @@ static void CodeIClassTagSOF()
        // Convert from last byte pos to length
        ToSendMax++;
 }
-
+int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
 /**
  * @brief SimulateIClass simulates an iClass card.
  * @param arg0 type of simulation
@@ -977,37 +977,42 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
        iso14a_clear_trace();
 
        uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
-
        if(simType == 0) {
                // Use the CSN from commandline
                memcpy(csn_crc, datain, 8);
-               doIClassSimulation(csn_crc,0);
+               doIClassSimulation(csn_crc,0,NULL);
        }else if(simType == 1)
        {
-               doIClassSimulation(csn_crc,0);
+               doIClassSimulation(csn_crc,0,NULL);
        }
        else if(simType == 2)
        {
+
+               uint8_t mac_responses[64] = { 0 };
                Dbprintf("Going into attack mode");
                // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
                // in order to collect MAC's from the reader. This can later be used in an offlne-attack
                // in order to obtain the keys, as in the "dismantling iclass"-paper.
-               for(int i = 0 ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++)
+               int i = 0;
+               for( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++)
                {
                        // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
 
                        memcpy(csn_crc, datain+(i*8), 8);
-                       if(doIClassSimulation(csn_crc,1))
+                       if(doIClassSimulation(csn_crc,1,mac_responses))
                        {
                                return; // Button pressed
                        }
                }
+               cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
+
        }
        else{
                // We may want a mode here where we hardcode the csns to use (from proxclone).
                // That will speed things up a little, but not required just yet.
                Dbprintf("The mode is not implemented, reserved for future use");
        }
+       Dbprintf("Done...");
 
 }
 /**
@@ -1015,7 +1020,7 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
  * @param csn - csn to use
  * @param breakAfterMacReceived if true, returns after reader MAC has been received.
  */
-int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
+int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
 {
 
        // CSN followed by two CRC bytes
@@ -1109,6 +1114,12 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 
        LED_A_ON();
        bool buttonPressed = false;
+
+       /** Hack  for testing
+       memcpy(reader_mac_buf,csn,8);
+       exitLoop = true;
+       end hack **/
+
        while(!exitLoop) {
 
                LED_B_OFF();
@@ -1159,11 +1170,15 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
                        if (breakAfterMacReceived){
                                // TODO, actually return this to the caller instead of just
                                // dbprintf:ing ...
-                               Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x");
+                               Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
                                Dbprintf("RDR:  (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
                                                 receivedCmd[0], receivedCmd[1], receivedCmd[2],
                                                receivedCmd[3], receivedCmd[4], receivedCmd[5],
                                                receivedCmd[6], receivedCmd[7], receivedCmd[8]);
+                               if (reader_mac_buf != NULL)
+                               {
+                                       memcpy(reader_mac_buf,receivedCmd+1,8);
+                               }
                                exitLoop = true;
                        }
                } else if(receivedCmd[0] == 0x00 && len == 1) {
@@ -1187,7 +1202,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
 
                if(cmdsRecvd >  100) {
                        //DbpString("100 commands later...");
-                       break;
+                       //break;
                }
                else {
                        cmdsRecvd++;
@@ -1217,7 +1232,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
                memset(receivedCmd, 0x44, RECV_CMD_SIZE);
        }
 
-       Dbprintf("%x", cmdsRecvd);
+       //Dbprintf("%x", cmdsRecvd);
        LED_A_OFF();
        LED_B_OFF();
        if(buttonPressed)