CHG: some minor adjustments.

[proxmark3-svn] / armsrc / iclass.c

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index 42deea86040145dcf3b82d5b7e1a9722b551da3d..f5e821cb3a8a3dabc83c9f4454b5c12a2760c7bc 100644 (file)
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -36,11 +36,7 @@
 //
 //-----------------------------------------------------------------------------
 
-#include "proxmark3.h"
 #include "apps.h"
-#include "util.h"
-#include "string.h"
-#include "common.h"
 #include "cmd.h"
 // Needed for CRC in emulation mode;
 // same construction as in ISO 14443;
@@ -52,7 +48,6 @@
 
 static int timeout = 4096;
 
-
 static int SendIClassAnswer(uint8_t *resp, int respLen, int delay);
 
 //-----------------------------------------------------------------------------
@@ -63,7 +58,7 @@ static struct {
     enum {
         STATE_UNSYNCD,
         STATE_START_OF_COMMUNICATION,
-       STATE_RECEIVING
+               STATE_RECEIVING
     }       state;
     uint16_t    shiftReg;
     int     bitCnt;
@@ -425,6 +420,7 @@ static RAMFUNC int ManchesterDecoding(int v)
                                if(!(Demod.buffer2 & Demod.syncBit) || !(Demod.buffer3 & Demod.syncBit)) {
                                        Demod.state = DEMOD_UNSYNCD;
                                        error = 0x88;
+                                       return FALSE;
                                }
                                
                                // TODO: use this error value to print?  Ask Holiman.
@@ -1294,7 +1290,7 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf)
                else {
                        //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44
                        // Never seen this command before
-                       Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
+                       Dbprintf("Unhandled command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
                        len,
                        receivedCmd[0], receivedCmd[1], receivedCmd[2],
                        receivedCmd[3], receivedCmd[4], receivedCmd[5],
@@ -1467,7 +1463,7 @@ void CodeIClassCommand(const uint8_t * cmd, int len)
     for(j = 0; j < 4; j++) {
       for(k = 0; k < 4; k++) {
                        if(k == (b & 3)) {
-                               ToSend[++ToSendMax] = 0x0f;
+                               ToSend[++ToSendMax] = 0xf0;
                        }
                        else {
                                ToSend[++ToSendMax] = 0x00;
@@ -1986,18 +1982,26 @@ void iClass_Dump(uint8_t blockno, uint8_t numblks) {
 }
 
 bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) {
-       uint8_t write[] = { ICLASS_CMD_UPDATE, blockNo, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+       uint8_t write[] = { ICLASS_CMD_UPDATE, blockNo, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        //uint8_t readblockdata[10];
        //write[1] = blockNo;
        memcpy(write+2, data, 12); // data + mac
+       char *wrCmd = (char *)(write+1); 
+       uint16_t wrCrc = iclass_crc16(wrCmd, 13);
+       write[14] = wrCrc >> 8;
+       write[15] = wrCrc & 0xff;
        uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0};
-       bool isOK;
+       bool isOK = false;
+
        isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10);
-       if (isOK) {
+       if (isOK) { //if reader responded correctly
                //Dbprintf("WriteResp: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",resp[0],resp[1],resp[2],resp[3],resp[4],resp[5],resp[6],resp[7],resp[8],resp[9]);
-               if (memcmp(write+2,resp,8)) {
+               if (memcmp(write+2,resp,8)) {  //if response is not equal to write values
+                       if (blockNo != 3 && blockNo != 4) { //if not programming key areas (note key blocks don't get programmed with actual key data it is xor data)
                        //error try again
                        isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10);
+                       } 
+                       
                }
        }
        return isOK;