]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/iclass.c
Small lf bug fixes and threshold adjustments
[proxmark3-svn] / armsrc / iclass.c
index 2b1230f5a8e84d0e9718e6d6a76c2b7727cab41c..ea9af7d4f4fa11c9b84f15d4a8ea0ee6314bd02f 100644 (file)
@@ -433,7 +433,6 @@ static RAMFUNC int ManchesterDecoding(int v)
        else {
                modulation = bit & Demod.syncBit;
                modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
-               //modulation = ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
 
                Demod.samples += 4;
 
@@ -842,10 +841,7 @@ static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
         }
         if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
             uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       /*if(OutOfNDecoding((b & 0xf0) >> 4)) {
-                               *len = Uart.byteCnt;
-                               return TRUE;
-                       }*/
+
                        if(OutOfNDecoding(b & 0x0f)) {
                                *len = Uart.byteCnt;
                                return TRUE;
@@ -1001,8 +997,6 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
  */
 int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
 {
-
-
        // CSN followed by two CRC bytes
        uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
@@ -1106,6 +1100,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                //Signal tracer
                // Can be used to get a trigger for an oscilloscope..
                LED_C_OFF();
+
                if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) {
                        buttonPressed = true;
                        break;
@@ -1368,7 +1363,6 @@ void ReaderTransmitIClass(uint8_t* frame, int len)
        int samples = 0;
 
        // This is tied to other size changes
-       //      uint8_t* frame_addr = ((uint8_t*)BigBuf) + 2024;
        CodeIClassCommand(frame,len);
 
        // Select the card
@@ -1423,10 +1417,7 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples,
                        b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        skip = !skip;
                        if(skip) continue;
-                       /*if(ManchesterDecoding((b>>4) & 0xf)) {
-                               *samples = ((c - 1) << 3) + 4;
-                               return TRUE;
-                       }*/
+               
                        if(ManchesterDecoding(b & 0x0f)) {
                                *samples = c << 3;
                                return  TRUE;
@@ -1474,100 +1465,142 @@ void setupIclassReader()
 
 }
 
+size_t sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries)
+{
+       while(retries-- > 0)
+       {
+               ReaderTransmitIClass(command, cmdsize);
+               if(expected_size == ReaderReceiveIClass(resp)){
+                       return 0;
+               }
+       }
+       return 1;//Error
+}
+
+/**
+ * @brief Talks to an iclass tag, sends the commands to get CSN and CC.
+ * @param card_data where the CSN and CC are stored for return
+ * @return 0 = fail
+ *         1 = Got CSN
+ *         2 = Got CSN and CC
+ */
+uint8_t handshakeIclassTag(uint8_t *card_data)
+{
+       static uint8_t act_all[]     = { 0x0a };
+       static uint8_t identify[]    = { 0x0c };
+       static uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+       static uint8_t readcheck_cc[]= { 0x88, 0x02 };
+       uint8_t *resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+
+       uint8_t read_status = 0;
+
+       // Send act_all
+       ReaderTransmitIClass(act_all, 1);
+       // Card present?
+       if(!ReaderReceiveIClass(resp)) return read_status;//Fail
+       //Send Identify
+       ReaderTransmitIClass(identify, 1);
+       //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC
+       uint8_t len  = ReaderReceiveIClass(resp);
+       if(len != 10) return read_status;//Fail
+
+       //Copy the Anti-collision CSN to our select-packet
+       memcpy(&select[1],resp,8);
+       //Select the card
+       ReaderTransmitIClass(select, sizeof(select));
+       //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC
+       len  = ReaderReceiveIClass(resp);
+       if(len != 10) return read_status;//Fail
+
+       //Success - level 1, we got CSN
+       //Save CSN in response data
+       memcpy(card_data,resp,8);
+
+       //Flag that we got to at least stage 1, read CSN
+       read_status = 1;
+
+       // Card selected, now read e-purse (cc)
+       ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
+       if(ReaderReceiveIClass(resp) == 8) {
+               //Save CC (e-purse) in response data
+               memcpy(card_data+8,resp,8);
+
+               //Got both
+               read_status = 2;
+       }
+
+       return read_status;
+}
+
 // Reader iClass Anticollission
 void ReaderIClass(uint8_t arg0) {
-    uint8_t act_all[]     = { 0x0a };
-    uint8_t identify[]    = { 0x0c };
-    uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-    uint8_t readcheck_cc[]= { 0x88, 0x02 };
 
     uint8_t card_data[24]={0};
     uint8_t last_csn[8]={0};
-
-    uint8_t *resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
        
     int read_status= 0;
     bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
+       bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC;
 
     setupIclassReader();
 
     size_t datasize = 0;
     while(!BUTTON_PRESS())
     {
-        WDT_HIT();
 
-        // Send act_all
-        ReaderTransmitIClass(act_all, 1);
-        // Card present?
-        if(ReaderReceiveIClass(resp)) {
-
-            ReaderTransmitIClass(identify, 1);
-
-            if(ReaderReceiveIClass(resp) == 10) {
-                //Copy the Anti-collision CSN to our select-packet
-                memcpy(&select[1],resp,8);
-                //Dbprintf("Anti-collision CSN: %02x %02x %02x %02x %02x %02x %02x %02x",resp[0], resp[1], resp[2],
-                //        resp[3], resp[4], resp[5],
-                //        resp[6], resp[7]);
-                //Select the card
-                ReaderTransmitIClass(select, sizeof(select));
-
-                if(ReaderReceiveIClass(resp) == 10) {
-                    //Save CSN in response data
-                    memcpy(card_data,resp,8);
-                    datasize += 8;
-                    //Flag that we got to at least stage 1, read CSN
-                    read_status = 1;
-
-                    // Card selected
-                    //Dbprintf("Readcheck on Sector 2");
-                    ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
-                    if(ReaderReceiveIClass(resp) == 8) {
-                        //Save CC (e-purse) in response data
-                        memcpy(card_data+8,resp,8);
-                        datasize += 8;
-                        //Got both
-                        read_status = 2;
-                    }
-
-                    LED_B_ON();
-                    //Send back to client, but don't bother if we already sent this
-                    if(memcmp(last_csn, card_data, 8) != 0)
-                        cmd_send(CMD_ACK,read_status,0,0,card_data,datasize);
-
-                    //Save that we already sent this....
-                    if(read_status ==  2)
-                        memcpy(last_csn, card_data, 8);
-
-                    LED_B_OFF();
-
-                    if(abort_after_read) break;
-                }
-            }
-        }
+               if(traceLen > TRACE_SIZE) {
+                       DbpString("Trace full");
+                       break;
+               }
+               WDT_HIT();
 
-        if(traceLen > TRACE_SIZE) {
-            DbpString("Trace full");
-            break;
-        }
-    }
+               read_status = handshakeIclassTag(card_data);
 
-    cmd_send(CMD_ACK,0,0,0,card_data, 0);
+               if(read_status == 0) continue;
+               if(read_status == 1) datasize = 8;
+               if(read_status == 2) datasize = 16;
+
+               LED_B_ON();
+               //Send back to client, but don't bother if we already sent this
+               if(memcmp(last_csn, card_data, 8) != 0)
+               {
 
+                       if(!get_cc || (get_cc && read_status == 2))
+                       {
+                               cmd_send(CMD_ACK,read_status,0,0,card_data,datasize);
+                               if(abort_after_read) {
+                                       LED_A_OFF();
+                                       return;
+                               }
+                               //Save that we already sent this....
+                               memcpy(last_csn, card_data, 8);
+                       }
+                       //If 'get_cc' was specified and we didn't get a CC, we'll just keep trying...
+               }
+               LED_B_OFF();
+    }
+    cmd_send(CMD_ACK,0,0,0,card_data, 0);
     LED_A_OFF();
 }
 
 void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
-       uint8_t act_all[]     = { 0x0a };
-       uint8_t identify[]    = { 0x0c };
-       uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-       uint8_t readcheck_cc[]= { 0x88, 0x02 };
+
+       uint8_t card_data[USB_CMD_DATA_SIZE]={0};
+       uint16_t block_crc_LUT[255] = {0};
+
+       {//Generate a lookup table for block crc
+               for(int block = 0; block < 255; block++){
+                       char bl = block;
+                       block_crc_LUT[block] = iclass_crc16(&bl ,1);
+               }
+       }
+       //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]);
+
        uint8_t check[]       = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t read[]        = { 0x0c, 0x00, 0x00, 0x00 };
        
     uint16_t crc = 0;
        uint8_t cardsize=0;
-       bool read_success=false;
        uint8_t mem=0;
        
        static struct memory_t{
@@ -1583,102 +1616,108 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
     setupIclassReader();
 
 
-       for(int i=0;i<1;i++) {
+       while(!BUTTON_PRESS()) {
        
+               WDT_HIT();
+
                if(traceLen > TRACE_SIZE) {
                        DbpString("Trace full");
                        break;
                }
                
-               if (BUTTON_PRESS()) break;
+               uint8_t read_status = handshakeIclassTag(card_data);
+               if(read_status < 2) continue;
 
-               // Send act_all
-               ReaderTransmitIClass(act_all, 1);
-               // Card present?
-               if(ReaderReceiveIClass(resp)) {
-                       ReaderTransmitIClass(identify, 1);
-                       if(ReaderReceiveIClass(resp) == 10) {
-                               // Select card          
-                               memcpy(&select[1],resp,8);
-                               ReaderTransmitIClass(select, sizeof(select));
+               //for now replay captured auth (as cc not updated)
+               memcpy(check+5,MAC,4);
 
-                               if(ReaderReceiveIClass(resp) == 10) {
-                                       Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
-                                       resp[0], resp[1], resp[2],
-                                       resp[3], resp[4], resp[5],
-                                       resp[6], resp[7]);
-                               }
-                               // Card selected
-                               Dbprintf("Readcheck on Sector 2");
-                               ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
-                               if(ReaderReceiveIClass(resp) == 8) {
-                                  Dbprintf("     CC: %02x %02x %02x %02x %02x %02x %02x %02x",
-                                       resp[0], resp[1], resp[2],
-                                       resp[3], resp[4], resp[5],
-                                       resp[6], resp[7]);
-                               }else return;
-                               Dbprintf("Authenticate");
-                               //for now replay captured auth (as cc not updated)
-                               memcpy(check+5,MAC,4);
-                //Dbprintf("     AA: %02x %02x %02x %02x",
-                //     check[5], check[6], check[7],check[8]);
-                               ReaderTransmitIClass(check, sizeof(check));
-                               if(ReaderReceiveIClass(resp) == 4) {
-                                  Dbprintf("     AR: %02x %02x %02x %02x",
-                                       resp[0], resp[1], resp[2],resp[3]);
-                               }else {
-                                 Dbprintf("Error: Authentication Fail!");
-                                 return;
-                               }
-                               Dbprintf("Dump Contents");
-                               //first get configuration block
-                               read_success=false;
-                               read[1]=1;
-                               uint8_t *blockno=&read[1];
-                               crc = iclass_crc16((char *)blockno,1);
-                               read[2] = crc >> 8;
-                               read[3] = crc & 0xff;
-                               while(!read_success){
-                                     ReaderTransmitIClass(read, sizeof(read));
-                                     if(ReaderReceiveIClass(resp) == 10) {
-                                        read_success=true;
-                                        mem=resp[5];
-                                        memory.k16= (mem & 0x80);
-                                        memory.book= (mem & 0x20);
-                                        memory.k2= (mem & 0x8);
-                                        memory.lockauth= (mem & 0x2);
-                                        memory.keyaccess= (mem & 0x1);
+               if(sendCmdGetResponseWithRetries(check, sizeof(check),resp, 4, 5))
+               {
+                       Dbprintf("Error: Authentication Fail!");
+                       continue;
+               }
 
-                                     }
-                               }
-                               if (memory.k16){
-                                 cardsize=255;
-                               }else cardsize=32;
-                               //then loop around remaining blocks
-                               for(uint8_t j=0; j<cardsize; j++){
-                                   read_success=false;
-                                   uint8_t *blockno=&j;
-                                   //crc_data[0]=j;
-                                   read[1]=j;
-                                   crc = iclass_crc16((char *)blockno,1);
-                                   read[2] = crc >> 8;
-                                   read[3] = crc & 0xff;
-                                   while(!read_success){
-                                     ReaderTransmitIClass(read, sizeof(read));
-                                     if(ReaderReceiveIClass(resp) == 10) {
-                                        read_success=true;
-                                        Dbprintf("     %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
-                                         j, resp[0], resp[1], resp[2],
-                                         resp[3], resp[4], resp[5],
-                                         resp[6], resp[7]);
-                                     }
-                                   }
+               //first get configuration block (block 1)
+               crc = block_crc_LUT[1];
+               read[1]=1;
+               read[2] = crc >> 8;
+               read[3] = crc & 0xff;
+
+               if(sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10))
+               {
+                       Dbprintf("Dump config (block 1) failed");
+                       continue;
+               }
+
+               mem=resp[5];
+               memory.k16= (mem & 0x80);
+               memory.book= (mem & 0x20);
+               memory.k2= (mem & 0x8);
+               memory.lockauth= (mem & 0x2);
+               memory.keyaccess= (mem & 0x1);
+
+               cardsize = memory.k16 ? 255 : 32;
+               WDT_HIT();
+               //Set card_data to all zeroes, we'll fill it with data
+               memset(card_data,0x0,USB_CMD_DATA_SIZE);
+               uint8_t failedRead =0;
+               uint8_t stored_data_length =0;
+               //then loop around remaining blocks
+               for(int block=0; block < cardsize; block++){
+
+                       read[1]= block;
+                       crc = block_crc_LUT[block];
+                       read[2] = crc >> 8;
+                       read[3] = crc & 0xff;
+
+                       if(!sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10))
+                       {
+                               Dbprintf("     %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
+                                                block, resp[0], resp[1], resp[2],
+                                               resp[3], resp[4], resp[5],
+                                               resp[6], resp[7]);
+
+                               //Fill up the buffer
+                               memcpy(card_data+stored_data_length,resp,8);
+                               stored_data_length += 8;
+
+                               if(stored_data_length +8 > USB_CMD_DATA_SIZE)
+                               {//Time to send this off and start afresh
+                                       cmd_send(CMD_ACK,
+                                                        stored_data_length,//data length
+                                                        failedRead,//Failed blocks?
+                                                        0,//Not used ATM
+                                                        card_data, stored_data_length);
+                                       //reset
+                                       stored_data_length = 0;
+                                       failedRead = 0;
                                }
+
+                       }else{
+                               failedRead = 1;
+                               stored_data_length +=8;//Otherwise, data becomes misaligned
+                               Dbprintf("Failed to dump block %d", block);
                        }
                }
-               WDT_HIT();
+               //Send off any remaining data
+               if(stored_data_length > 0)
+               {
+                       cmd_send(CMD_ACK,
+                                        stored_data_length,//data length
+                                        failedRead,//Failed blocks?
+                                        0,//Not used ATM
+                                        card_data, stored_data_length);
+               }
+               //If we got here, let's break
+               break;
        }
-       
+       //Signal end of transmission
+       cmd_send(CMD_ACK,
+                        0,//data length
+                        0,//Failed blocks?
+                        0,//Not used ATM
+                        card_data, 0);
+
        LED_A_OFF();
 }
 
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