refactor detectST a little...

[proxmark3-svn] / armsrc / epa.c

diff --git a/armsrc/epa.c b/armsrc/epa.c
index 6bd8692ecaa52d53c7c18ea3364acac26fdb670a..5e69ffa89d5020132271bd02740c4ef030b39869 100644 (file)
--- a/armsrc/epa.c
+++ b/armsrc/epa.c
@@ -11,11 +11,16 @@
 // functions, You need to do the setup before calling them!
 //-----------------------------------------------------------------------------
 
+#include "apps.h"
 #include "iso14443a.h"
+#include "iso14443b.h"
 #include "epa.h"
 #include "cmd.h"
+#include "fpgaloader.h"
+#include "string.h"
+#include "util.h"
 
-// Protocol and Parameter Selection Request
+// Protocol and Parameter Selection Request for ISO 14443 type A cards
 // use regular (1x) speed in both directions
 // CRC is already included
 static const uint8_t pps[] = {0xD0, 0x11, 0x00, 0x52, 0xA6};
@@ -100,6 +105,28 @@ static struct {
 // lengths of the replay APDUs
 static uint8_t apdu_lengths_replay[5];
 
+// type of card (ISO 14443 A or B)
+static char iso_type = 0;
+
+//-----------------------------------------------------------------------------
+// Wrapper for sending APDUs to type A and B cards
+//-----------------------------------------------------------------------------
+int EPA_APDU(uint8_t *apdu, size_t length, uint8_t *response)
+{
+       switch(iso_type)
+       {
+               case 'a':
+                       return iso14_apdu(apdu, (uint16_t) length, response);
+                       break;
+               case 'b':
+                       return iso14443b_apdu(apdu, length, response);
+                       break;
+               default:
+                       return 0;
+                       break;
+       }
+}
+
 //-----------------------------------------------------------------------------
 // Closes the communication channel and turns off the field
 //-----------------------------------------------------------------------------
@@ -107,6 +134,7 @@ void EPA_Finish()
 {
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
+       iso_type = 0;
 }
 
 //-----------------------------------------------------------------------------
@@ -204,26 +232,26 @@ int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length)
        int rapdu_length = 0;
 
        // select the file EF.CardAccess
-       rapdu_length = iso14_apdu((uint8_t *)apdu_select_binary_cardaccess,
+       rapdu_length = EPA_APDU((uint8_t *)apdu_select_binary_cardaccess,
                                  sizeof(apdu_select_binary_cardaccess),
                                  response_apdu);
-       if (rapdu_length != 6
+       if (rapdu_length < 6
            || response_apdu[rapdu_length - 4] != 0x90
            || response_apdu[rapdu_length - 3] != 0x00)
        {
-               Dbprintf("epa - no select cardaccess");
+               DbpString("Failed to select EF.CardAccess!");
                return -1;
        }
 
        // read the file
-       rapdu_length = iso14_apdu((uint8_t *)apdu_read_binary,
+       rapdu_length = EPA_APDU((uint8_t *)apdu_read_binary,
                                  sizeof(apdu_read_binary),
                                  response_apdu);
        if (rapdu_length <= 6
            || response_apdu[rapdu_length - 4] != 0x90
            || response_apdu[rapdu_length - 3] != 0x00)
        {
-               Dbprintf("epa - no read cardaccess");
+               Dbprintf("Failed to read EF.CardAccess!");
                return -1;
        }
 
@@ -338,7 +366,7 @@ int EPA_PACE_Get_Nonce(uint8_t requested_length, uint8_t *nonce)
 
        // send it
        uint8_t response_apdu[262];
-       int send_return = iso14_apdu(apdu,
+       int send_return = EPA_APDU(apdu,
                                     sizeof(apdu),
                                     response_apdu);
        // check if the command succeeded
@@ -409,7 +437,7 @@ int EPA_PACE_MSE_Set_AT(pace_version_info_t pace_version_info, uint8_t password)
        apdu[4] = apdu_length - 5;
        // send it
        uint8_t response_apdu[6];
-       int send_return = iso14_apdu(apdu,
+       int send_return = EPA_APDU(apdu,
                                     apdu_length,
                                     response_apdu);
        // check if the command succeeded
@@ -460,16 +488,13 @@ void EPA_PACE_Replay(UsbCommand *c)
                return;
        }
 
-       // increase the timeout (at least some cards really do need this!)/////////////
-       // iso14a_set_timeout(0x0003FFFF);
-
        // response APDU
        uint8_t response_apdu[300] = {0};
 
        // now replay the data and measure the timings
        for (int i = 0; i < sizeof(apdu_lengths_replay); i++) {
                StartCountUS();
-               func_return = iso14_apdu(apdus_replay[i].data,
+               func_return = EPA_APDU(apdus_replay[i].data,
                                         apdu_lengths_replay[i],
                                         response_apdu);
                timings[i] = GetCountUS();
@@ -501,18 +526,33 @@ int EPA_Setup()
        uint8_t pps_response_par[1];
        iso14a_card_select_t card_select_info;
 
+       // first, look for type A cards
        // power up the field
        iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
        // select the card
        return_code = iso14443a_select_card(uid, &card_select_info, NULL);
-       if (return_code != 1) {
-               return 1;
+       if (return_code == 1) {
+               // send the PPS request
+               ReaderTransmit((uint8_t *)pps, sizeof(pps), NULL);
+               return_code = ReaderReceive(pps_response, pps_response_par);
+               if (return_code != 3 || pps_response[0] != 0xD0) {
+                       return return_code == 0 ? 2 : return_code;
+               }
+               Dbprintf("ISO 14443 Type A");
+               iso_type = 'a';
+               return 0;
        }
-       // send the PPS request
-       ReaderTransmit((uint8_t *)pps, sizeof(pps), NULL);
-       return_code = ReaderReceive(pps_response, pps_response_par);
-       if (return_code != 3 || pps_response[0] != 0xD0) {
-               return return_code == 0 ? 2 : return_code;
+
+       // if we're here, there is no type A card, so we look for type B
+       // power up the field
+       iso14443b_setup();
+       // select the card
+       return_code = iso14443b_select_card();
+       if (return_code == 1) {
+               Dbprintf("ISO 14443 Type B");
+               iso_type = 'b';
+               return 0;
        }
-       return 0;
+       Dbprintf("No card found.");
+       return 1;
 }