]> cvs.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/iclass.c
added changelog
[proxmark3-svn] / armsrc / iclass.c
index f99d0ecac4dc18d421433d310c73b160d696eecd..f9aedc9577f17a89c36b9b56d82459b6e8c93f75 100644 (file)
@@ -42,6 +42,7 @@
 #include "string.h"
 #include "common.h"
 #include "cmd.h"
+#include "iso14443a.h"
 // Needed for CRC in emulation mode;
 // same construction as in ISO 14443;
 // different initial value (CRC_ICLASS)
@@ -49,6 +50,7 @@
 #include "iso15693tools.h"
 #include "protocols.h"
 #include "optimized_cipher.h"
+#include "usb_cdc.h" // for usb_poll_validate_length
 
 static int timeout = 4096;
 
@@ -1473,7 +1475,7 @@ 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;
@@ -1580,8 +1582,8 @@ void setupIclassReader()
 {
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
     // Reset trace buffer
-       set_tracing(TRUE);
-       clear_trace();
+         set_tracing(TRUE);
+         clear_trace();
 
     // Setup SSC
     FpgaSetupSsc();
@@ -1661,7 +1663,7 @@ uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key)
        //Flag that we got to at least stage 1, read CSN
        read_status = 1;
 
-       // Card selected, now read e-purse (cc)
+       // Card selected, now read e-purse (cc) (only 8 bytes no CRC)
        ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
        if(ReaderReceiveIClass(resp) == 8) {
                //Save CC (e-purse) in response data
@@ -1671,7 +1673,7 @@ uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key)
 
        return read_status;
 }
-uint8_t handshakeIclassTag(uint8_t *card_data){
+uint8_t handshakeIclassTag(uint8_t *card_data) {
        return handshakeIclassTag_ext(card_data, false);
 }
 
@@ -1681,28 +1683,37 @@ void ReaderIClass(uint8_t arg0) {
 
        uint8_t card_data[6 * 8]={0};
        memset(card_data, 0xFF, sizeof(card_data));
-       uint8_t last_csn[8]={0};
-       
+       uint8_t last_csn[8]={0,0,0,0,0,0,0,0};
+       uint8_t resp[ICLASS_BUFFER_SIZE];
+       memset(resp, 0xFF, sizeof(resp));
        //Read conf block CRC(0x01) => 0xfa 0x22
        uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x01, 0xfa, 0x22};
-       //Read conf block CRC(0x05) => 0xde  0x64
+       //Read App Issuer Area block CRC(0x05) => 0xde  0x64
        uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x05, 0xde, 0x64};
 
-
        int read_status= 0;
        uint8_t result_status = 0;
+       // flag to read until one tag is found successfully
        bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
+       // flag to only try 5 times to find one tag then return
        bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY;
-       bool use_credit_key = false;
-       if (arg0 & FLAG_ICLASS_READER_CEDITKEY)
-               use_credit_key = true;
-       set_tracing(TRUE);
+       // if neither abort_after_read nor try_once then continue reading until button pressed.
+
+       bool use_credit_key = arg0 & FLAG_ICLASS_READER_CEDITKEY;
+       // test flags for what blocks to be sure to read
+       uint8_t flagReadConfig = arg0 & FLAG_ICLASS_READER_CONF;
+       uint8_t flagReadCC = arg0 & FLAG_ICLASS_READER_CC;
+       uint8_t flagReadAA = arg0 & FLAG_ICLASS_READER_AA;
+
+       set_tracing(true);
        setupIclassReader();
 
        uint16_t tryCnt=0;
-       while(!BUTTON_PRESS())
+       bool userCancelled = BUTTON_PRESS() || usb_poll_validate_length();
+       while(!userCancelled)
        {
-               if (try_once && tryCnt > 5) break; 
+               // if only looking for one card try 2 times if we missed it the first time
+               if (try_once && tryCnt > 2) break; 
                tryCnt++;
                if(!tracing) {
                        DbpString("Trace full");
@@ -1721,21 +1732,22 @@ void ReaderIClass(uint8_t arg0) {
                // moving CC forward 8 bytes
                memcpy(card_data+16,card_data+8, 8);
                //Read block 1, config
-               if(arg0 & FLAG_ICLASS_READER_CONF)
-               {
-                       if(sendCmdGetResponseWithRetries(readConf, sizeof(readConf),card_data+8, 10, 10))
+               if(flagReadConfig) {
+                       if(sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, 10, 10))
                        {
                                result_status |= FLAG_ICLASS_READER_CONF;
+                               memcpy(card_data+8, resp, 8);
                        } else {
                                Dbprintf("Failed to dump config block");
                        }
                }
 
                //Read block 5, AA
-               if(arg0 & FLAG_ICLASS_READER_AA){
-                       if(sendCmdGetResponseWithRetries(readAA, sizeof(readAA),card_data+(8*4), 10, 10))
+               if(flagReadAA) {
+                       if(sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, 10, 10))
                        {
                                result_status |= FLAG_ICLASS_READER_AA;
+                               memcpy(card_data+(8*5), resp, 8);
                        } else {
                                //Dbprintf("Failed to dump AA block");
                        }
@@ -1747,19 +1759,20 @@ void ReaderIClass(uint8_t arg0) {
                // (3,4 write-only, kc and kd)
                // 5 Application issuer area
                //
-               //Then we can 'ship' back the 8 * 5 bytes of data,
+               //Then we can 'ship' back the 8 * 6 bytes of data,
                // with 0xFF:s in block 3 and 4.
 
                LED_B_ON();
-               //Send back to client, but don't bother if we already sent this
+               //Send back to client, but don't bother if we already sent this - 
+               //  only useful if looping in arm (not try_once && not abort_after_read)
                if(memcmp(last_csn, card_data, 8) != 0)
                {
-                       // If caller requires that we get CC, continue until we got it
-                       if( (arg0 & read_status & FLAG_ICLASS_READER_CC) || !(arg0 & FLAG_ICLASS_READER_CC))
-                       {
+                       // If caller requires that we get Conf, CC, AA, continue until we got it
+                       if( (result_status ^ FLAG_ICLASS_READER_CSN ^ flagReadConfig ^ flagReadCC ^ flagReadAA) == 0) {
                                cmd_send(CMD_ACK,result_status,0,0,card_data,sizeof(card_data));
                                if(abort_after_read) {
                                        LED_A_OFF();
+                                       LED_B_OFF();
                                        return;
                                }
                                //Save that we already sent this....
@@ -1768,8 +1781,13 @@ void ReaderIClass(uint8_t arg0) {
 
                }
                LED_B_OFF();
+               userCancelled = BUTTON_PRESS() || usb_poll_validate_length();
+       }
+       if (userCancelled) {
+               cmd_send(CMD_ACK,0xFF,0,0,card_data, 0);
+       } else {
+               cmd_send(CMD_ACK,0,0,0,card_data, 0);
        }
-       cmd_send(CMD_ACK,0,0,0,card_data, 0);
        LED_A_OFF();
 }
 
@@ -1983,18 +2001,26 @@ 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)) {
-                       //error try again
-                       isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10);
+               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;
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