changed iso14aapdu arm side and client
authormerlokk <olegmsn@gmail.com>
Thu, 9 Nov 2017 14:39:40 +0000 (16:39 +0200)
committermerlokk <olegmsn@gmail.com>
Thu, 9 Nov 2017 14:39:40 +0000 (16:39 +0200)
armsrc/iso14443a.c
client/cmdhf14a.c
client/cmdhf14a.h

index 90e8538eb531c7c23c7e795c3f1b15d907fa1221..45425e079db22ee3d4cb5a3275b1dc07f2a320a7 100644 (file)
 
 #include "iso14443a.h"
 
+#include <stdio.h>
+#include <string.h>
 #include "proxmark3.h"
 #include "apps.h"
 #include "util.h"
-#include "string.h"
 #include "cmd.h"
 #include "iso14443crc.h"
 #include "crapto1/crapto1.h"
@@ -1873,29 +1874,47 @@ void iso14443a_setup(uint8_t fpga_minor_mode) {
 
 int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
        uint8_t parity[MAX_PARITY_SIZE];
-       uint8_t real_cmd[cmd_len+4];
-       real_cmd[0] = 0x0a; //I-Block
+       uint8_t real_cmd[cmd_len + 4];
+       
+       // ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02
+       real_cmd[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00) 
        // put block number into the PCB
        real_cmd[0] |= iso14_pcb_blocknum;
-       real_cmd[1] = 0x00; //CID: 0 //FIXME: allow multiple selected cards
-       memcpy(real_cmd+2, cmd, cmd_len);
-       AppendCrc14443a(real_cmd,cmd_len+2);
+       memcpy(real_cmd + 1, cmd, cmd_len);
+       AppendCrc14443a(real_cmd, cmd_len + 1);
  
-       ReaderTransmit(real_cmd, cmd_len+4, NULL);
+       ReaderTransmit(real_cmd, cmd_len + 3, NULL);
+
        size_t len = ReaderReceive(data, parity);
        uint8_t *data_bytes = (uint8_t *) data;
-       if (!len)
+
+       if (!len) {
                return 0; //DATA LINK ERROR
+               
        // if we received an I- or R(ACK)-Block with a block number equal to the
        // current block number, toggle the current block number
-       else if (len >= 4 // PCB+CID+CRC = 4 bytes
+       } else{
+               if (len >= 3 // PCB+CRC = 3 bytes
                 && ((data_bytes[0] & 0xC0) == 0 // I-Block
                     || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
                 && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
-       {
-               iso14_pcb_blocknum ^= 1;
-       }
+               {
+                       iso14_pcb_blocknum ^= 1;
+               }
 
+               // crc check
+               if (len >=3 && !CheckCrc14443(CRC_14443_A, data_bytes, len)) {
+                       return -1;
+               }
+               
+       }
+       
+       // cut frame byte
+       len -= 1;
+       // memmove(data_bytes, data_bytes + 1, len);
+       for (int i = 0; i < len; i++)
+               data_bytes[i] = data_bytes[i + 1];
+       
        return len;
 }
 
@@ -1952,7 +1971,7 @@ void ReaderIso14443a(UsbCommand *c)
        if(param & ISO14A_APDU && !cantSELECT) {
                arg0 = iso14_apdu(cmd, len, buf);
                LED_B_ON();
-               cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));
+               cmd_send(CMD_ACK, arg0, 0, 0, buf, sizeof(buf));
                LED_B_OFF();
        }
 
index c2d12fd9d20fa56ef15a7ff85cce7ab1490a81f9..18e13794627b5de97fbf34d6cd8910dd7e574090 100644 (file)
@@ -634,87 +634,73 @@ int CmdHF14ASnoop(const char *Cmd) {
        return 0;
 }
 
+void DropField() {
+       UsbCommand c = {CMD_READER_ISO_14443a, {0, 0, 0}}; 
+       SendCommand(&c);
+}
+
 int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool leaveSignalON, uint8_t *dataout, int *dataoutlen) {
-       uint8_t data[USB_CMD_DATA_SIZE];
-       int datalen;
        uint16_t cmdc = 0;
-       uint8_t first, second;
-       static uint8_t iso14_pcb_blocknum;
        
        if (activateField) {
                cmdc |= ISO14A_CONNECT | ISO14A_CLEAR_TRACE;
-               iso14_pcb_blocknum = 0;
        }
        if (leaveSignalON)
                cmdc |= ISO14A_NO_DISCONNECT;
 
-       // ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02
-       memcpy(data + 1, datain, datainlen);
-       data[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00)     
-       data[0] += iso14_pcb_blocknum; // add block number (bnr)
-
-       datalen = datainlen + 1;
-       
-       ComputeCrc14443(CRC_14443_A, data, datalen, &first, &second);
-       data[datalen++] = first;
-       data[datalen++] = second;
-
        // "Command APDU" length should be 5+255+1, but javacard's APDU buffer might be smaller - 133 bytes
        // https://stackoverflow.com/questions/32994936/safe-max-java-card-apdu-data-command-and-respond-size
        // here length USB_CMD_DATA_SIZE=512
        // timeout timeout14a * 1.06 / 100, true, size, &keyBlock[6 * c], e_sector); // timeout is (ms * 106)/10 or us*0.0106
-       UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_RAW | ISO14A_SET_TIMEOUT | cmdc, (datalen & 0xFFFF), 1000 * 1000 * 1.06 / 100}}; 
-       memcpy(c.d.asBytes, data, datalen);
+       UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_APDU | ISO14A_SET_TIMEOUT | cmdc, (datainlen & 0xFFFF), 1000 * 1000 * 1.06 / 100}}; 
+       memcpy(c.d.asBytes, datain, datainlen);
        SendCommand(&c);
        
     uint8_t *recv;
     UsbCommand resp;
 
        if (activateField) {
-               if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) 
+               if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
+                       PrintAndLog("APDU ERROR: Proxmark connection timeout.");
                        return 1;
-               if (resp.arg[0] != 1)
+               }
+               if (resp.arg[0] != 1) {
+                       PrintAndLog("APDU ERROR: Proxmark error %d.", resp.arg[0]);
                        return 1;
+               }
        }
 
     if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
         recv = resp.d.asBytes;
-        uint8_t iLen = resp.arg[0];
+        int iLen = resp.arg[0];
                
-               *dataoutlen = iLen - 1 - 2;
+               *dataoutlen = iLen - 2;
                if (*dataoutlen < 0)
                        *dataoutlen = 0;
-               memcpy(dataout, recv + 1, *dataoutlen);
+               memcpy(dataout, recv, *dataoutlen);
                
-        if(!iLen)
+        if(!iLen) {
+                       PrintAndLog("APDU ERROR: No APDU response.");
             return 1;
-
-               // check apdu length
-               if (iLen < 5) {
-                       PrintAndLog("APDU ERROR: Small APDU response.");
-                       return 2;
                }
 
-               // invert block number field in PCB byte
-               if ( ((recv[0] & 0xC0) == 0 // I-Block
-                          || (recv[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
-                        && (recv[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
-               {
-                       iso14_pcb_blocknum ^= 1;
-               }
-               
-               // check block
-               if (data[0] != recv[0]) {
-                       PrintAndLog("APDU ERROR: Block type mismatch: %02x-%02x", data[0], recv[0]);
+               // check block TODO
+               if (iLen == -2) {
+                       PrintAndLog("APDU ERROR: Block type mismatch.");
                        return 2;
                }
                
                // CRC Check
-               ComputeCrc14443(CRC_14443_A, recv, iLen, &first, &second);
-               if (first || second) {
+               if (iLen == -1) {
                        PrintAndLog("APDU ERROR: ISO 14443A CRC error.");
                        return 3;
                }
+
+               // check apdu length
+               if (iLen < 4) {
+                       PrintAndLog("APDU ERROR: Small APDU response. Len=%d", iLen);
+                       return 2;
+               }
                
     } else {
         PrintAndLog("APDU ERROR: Reply timeout.");
@@ -782,23 +768,12 @@ int CmdHF14AAPDU(const char *cmd) {
                cmdp++;
        }
 
-       PrintAndLog("--%s %s %s >>>> %s", activateField ? "sel": "", leaveSignalON ? "keep": "", decodeTLV ? "TLV": "", sprint_hex(data, datalen));
+       PrintAndLog(">>>>[%s%s%s] %s", activateField ? "sel ": "", leaveSignalON ? "keep ": "", decodeTLV ? "TLV": "", sprint_hex(data, datalen));
        
-       switch(ExchangeAPDU14a(data, datalen, activateField, leaveSignalON, data, &datalen)) {
-               case 0:
-                       break;
-               case 1:
-                       PrintAndLog("APDU ERROR: Send APDU error.");
-                       return 1;
-               case 2:
-                       return 2;
-               case 3:
-                       return 3;
-               case 4:
-                       return 4;
-               default:
-                       return 5;
-       }
+       int res = ExchangeAPDU14a(data, datalen, activateField, leaveSignalON, data, &datalen);
+
+       if (res)
+               return res;
 
        PrintAndLog("<<<< %s", sprint_hex(data, datalen));
        
index e7784de250a6b3c9bd7281b5420ccb8bfe707a2f..5276da365ec9f21044f6894b3df413d44ebf320a 100644 (file)
@@ -35,6 +35,7 @@ int CmdHF14ASim(const char *Cmd);
 int CmdHF14ASnoop(const char *Cmd);
 char* getTagInfo(uint8_t uid);
 
+extern void DropField();
 extern int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool leaveSignalON, uint8_t *dataout, int *dataoutlen);
 
 #endif
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