Implemented the correct way to calculate MAC from a tag, feeding it an extra 32 zeroe...

[proxmark3-svn] / armsrc / epa.c

diff --git a/armsrc/epa.c b/armsrc/epa.c
index 0e93a0561cd408f54c13b1cf8688d4a988ca19db..0006d59d01c03fd4944caefef829771b1b8068fc 100644 (file)
--- a/armsrc/epa.c
+++ b/armsrc/epa.c
@@ -12,8 +12,8 @@
 //-----------------------------------------------------------------------------
 
 #include "iso14443a.h"
-
 #include "epa.h"
+#include "cmd.h"
 
 // Protocol and Parameter Selection Request
 // use regular (1x) speed in both directions
@@ -108,9 +108,9 @@ size_t EPA_Parse_CardAccess(uint8_t *data,
                if (data[index] == 0x31 || data[index] == 0x30) {
                        // enter the set (skip tag + length)
                        index += 2;
-                       // extended length
+                       // check for extended length
                        if ((data[index - 1] & 0x80) != 0) {
-                               index += (data[index] & 0x7F);
+                               index += (data[index-1] & 0x7F);
                        }
                }
                // OID
@@ -185,6 +185,7 @@ int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length)
            || response_apdu[rapdu_length - 4] != 0x90
            || response_apdu[rapdu_length - 3] != 0x00)
        {
+               Dbprintf("epa - no select cardaccess");
                return -1;
        }
        
@@ -196,6 +197,7 @@ int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length)
            || response_apdu[rapdu_length - 4] != 0x90
            || response_apdu[rapdu_length - 3] != 0x00)
        {
+               Dbprintf("epa - no read cardaccess");
                return -1;
        }
        
@@ -211,24 +213,24 @@ int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length)
 // Abort helper function for EPA_PACE_Collect_Nonce
 // sets relevant data in ack, sends the response
 //-----------------------------------------------------------------------------
-static void EPA_PACE_Collect_Nonce_Abort(UsbCommand *ack, uint8_t step, int func_return)
+static void EPA_PACE_Collect_Nonce_Abort(uint8_t step, int func_return)
 {
-       // step in which the failure occured
-       ack->arg[0] = step;
-       // last return code
-       ack->arg[1] = func_return;
+//     // step in which the failure occured
+//     ack->arg[0] = step;
+//     // last return code
+//     ack->arg[1] = func_return;
 
        // power down the field
        EPA_Finish();
        
        // send the USB packet
-       UsbSendPacket((void *)ack, sizeof(UsbCommand));
+  cmd_send(CMD_ACK,step,func_return,0,0,0);
 }
 
 //-----------------------------------------------------------------------------
 // Acquire one encrypted PACE nonce
 //-----------------------------------------------------------------------------
-void EPA_PACE_Collect_Nonce(UsbCommand *c, UsbCommand *ack)
+void EPA_PACE_Collect_Nonce(UsbCommand *c)
 {
        /*
         * ack layout:
@@ -242,29 +244,26 @@ void EPA_PACE_Collect_Nonce(UsbCommand *c, UsbCommand *ack)
         */
 
        // return value of a function
-       int func_return;
+       int func_return = 0;
 
-       // initialize ack with 0s
-       memset(ack->arg, 0, 12);
-       memset(ack->d.asBytes, 0, 48);
+//     // initialize ack with 0s
+//     memset(ack->arg, 0, 12);
+//     memset(ack->d.asBytes, 0, 48);
        
        // set up communication
        func_return = EPA_Setup();
        if (func_return != 0) {
-               EPA_PACE_Collect_Nonce_Abort(ack, 1, func_return);
+               EPA_PACE_Collect_Nonce_Abort(1, func_return);
                return;
        }
 
-       // increase the timeout (at least some cards really do need this!)
-       iso14a_set_timeout(0x0002FFFF);
-       
        // read the CardAccess file
        // this array will hold the CardAccess file
        uint8_t card_access[256] = {0};
        int card_access_length = EPA_Read_CardAccess(card_access, 256);
        // the response has to be at least this big to hold the OID
        if (card_access_length < 18) {
-               EPA_PACE_Collect_Nonce_Abort(ack, 2, card_access_length);
+               EPA_PACE_Collect_Nonce_Abort(2, card_access_length);
                return;
        }
 
@@ -275,7 +274,7 @@ void EPA_PACE_Collect_Nonce(UsbCommand *c, UsbCommand *ack)
                                           card_access_length,
                                           &pace_version_info);
        if (func_return != 0 || pace_version_info.version == 0) {
-               EPA_PACE_Collect_Nonce_Abort(ack, 3, func_return);
+               EPA_PACE_Collect_Nonce_Abort(3, func_return);
                return;
        }
        
@@ -290,17 +289,17 @@ void EPA_PACE_Collect_Nonce(UsbCommand *c, UsbCommand *ack)
        // check if the command succeeded
        if (func_return < 0)
        {
-               EPA_PACE_Collect_Nonce_Abort(ack, 4, func_return);
+               EPA_PACE_Collect_Nonce_Abort(4, func_return);
                return;
        }
+  
+  // all done, return
+       EPA_Finish();
        
        // save received information
-       ack->arg[1] = func_return;
-       memcpy(ack->d.asBytes, nonce, func_return);
-
-       // all done, return
-       EPA_Finish();
-       UsbSendPacket((void *)ack, sizeof(UsbCommand));
+//     ack->arg[1] = func_return;
+//     memcpy(ack->d.asBytes, nonce, func_return);
+  cmd_send(CMD_ACK,0,func_return,0,nonce,func_return);
 }
 
 //-----------------------------------------------------------------------------
@@ -414,25 +413,26 @@ int EPA_PACE_MSE_Set_AT(pace_version_info_t pace_version_info, uint8_t password)
 //-----------------------------------------------------------------------------
 int EPA_Setup()
 {
-       // return code
+
        int return_code = 0;
-       // card UID
-       uint8_t uid[8];
-       // card select information
+       uint8_t uid[10];
+       uint8_t pps_response[3];
+       uint8_t pps_response_par[1];
        iso14a_card_select_t card_select_info;
+
        // power up the field
-       iso14443a_setup();
+       iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
 
        // select the card
        return_code = iso14443a_select_card(uid, &card_select_info, NULL);
        if (return_code != 1) {
+               Dbprintf("Epa: Can't select card");
                return 1;
        }
 
        // send the PPS request
-       ReaderTransmit((uint8_t *)pps, sizeof(pps));
-       uint8_t pps_response[3];
-       return_code = ReaderReceive(pps_response);
+       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;
        }