// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
-// Routines to support the German eletronic "Personalausweis" (ID card)
+// Routines to support the German electronic "Personalausweis" (ID card)
// Note that the functions which do not implement USB commands do NOT initialize
// the card (with iso14443a_select_card etc.). If You want to use these
// functions, You need to do the setup before calling them!
//-----------------------------------------------------------------------------
#include "iso14443a.h"
-
#include "epa.h"
+#include "cmd.h"
// Protocol and Parameter Selection Request
// use regular (1x) speed in both directions
0x04 // id-PACE
};
+// APDUs for replaying:
+// MSE: Set AT (initiate PACE)
+static uint8_t apdu_replay_mse_set_at_pace[41];
+// General Authenticate (Get Nonce)
+static uint8_t apdu_replay_general_authenticate_pace_get_nonce[8];
+// General Authenticate (Map Nonce)
+static uint8_t apdu_replay_general_authenticate_pace_map_nonce[75];
+// General Authenticate (Mutual Authenticate)
+static uint8_t apdu_replay_general_authenticate_pace_mutual_authenticate[75];
+// General Authenticate (Perform Key Agreement)
+static uint8_t apdu_replay_general_authenticate_pace_perform_key_agreement[18];
+// pointers to the APDUs (for iterations)
+static struct {
+ uint8_t len;
+ uint8_t *data;
+} const apdus_replay[] = {
+ {sizeof(apdu_replay_mse_set_at_pace), apdu_replay_mse_set_at_pace},
+ {sizeof(apdu_replay_general_authenticate_pace_get_nonce), apdu_replay_general_authenticate_pace_get_nonce},
+ {sizeof(apdu_replay_general_authenticate_pace_map_nonce), apdu_replay_general_authenticate_pace_map_nonce},
+ {sizeof(apdu_replay_general_authenticate_pace_mutual_authenticate), apdu_replay_general_authenticate_pace_mutual_authenticate},
+ {sizeof(apdu_replay_general_authenticate_pace_perform_key_agreement), apdu_replay_general_authenticate_pace_perform_key_agreement}
+};
+
+// lengths of the replay APDUs
+static uint8_t apdu_lengths_replay[5];
+
//-----------------------------------------------------------------------------
// Closes the communication channel and turns off the field
//-----------------------------------------------------------------------------
pace_version_info_t *pace_info)
{
size_t index = 0;
-
+
while (index <= length - 2) {
// determine type of element
// SET or SEQUENCE
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
index += 2 + data[index + 1];
}
}
-
+
// TODO: We should check whether we reached the end in error, but for that
// we need a better parser (e.g. with states like IN_SET or IN_PACE_INFO)
return 0;
// we reserve 262 bytes here just to be safe (256-byte APDU + SW + ISO frame)
uint8_t response_apdu[262];
int rapdu_length = 0;
-
+
// select the file EF.CardAccess
rapdu_length = iso14_apdu((uint8_t *)apdu_select_binary_cardaccess,
sizeof(apdu_select_binary_cardaccess),
|| response_apdu[rapdu_length - 4] != 0x90
|| response_apdu[rapdu_length - 3] != 0x00)
{
+ Dbprintf("epa - no select cardaccess");
return -1;
}
-
+
// read the file
rapdu_length = iso14_apdu((uint8_t *)apdu_read_binary,
sizeof(apdu_read_binary),
|| response_apdu[rapdu_length - 4] != 0x90
|| response_apdu[rapdu_length - 3] != 0x00)
{
+ Dbprintf("epa - no read cardaccess");
return -1;
}
-
+
// copy the content into the buffer
// length of data available: apdu_length - 4 (ISO frame) - 2 (SW)
size_t to_copy = rapdu_length - 6;
// 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;
-
- // send the USB packet
- UsbSendPacket((void *)ack, sizeof(UsbCommand));
-
// power down the field
EPA_Finish();
+
+ // send the USB packet
+ 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:
*/
// 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);
-
// 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;
}
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;
}
-
+
// initiate the PACE protocol
// use the CAN for the password since that doesn't change
func_return = EPA_PACE_MSE_Set_AT(pace_version_info, 2);
-
+
// now get the nonce
uint8_t nonce[256] = {0};
uint8_t requested_size = (uint8_t)c->arg[0];
// 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;
}
-
- // 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));
+
+ // save received information
+ cmd_send(CMD_ACK,0,func_return,0,nonce,func_return);
}
//-----------------------------------------------------------------------------
sizeof(apdu_general_authenticate_pace_get_nonce));
// append Le (requested length + 2 due to tag/length taking 2 bytes) in RAPDU
apdu[sizeof(apdu_general_authenticate_pace_get_nonce)] = requested_length + 4;
-
+
// send it
uint8_t response_apdu[262];
int send_return = iso14_apdu(apdu,
{
return -1;
}
-
+
// if there is no nonce in the RAPDU, return here
if (send_return < 10)
{
}
// copy the nonce
memcpy(nonce, response_apdu + 6, nonce_length);
-
+
return nonce_length;
}
return 0;
}
+//-----------------------------------------------------------------------------
+// Perform the PACE protocol by replaying given APDUs
+//-----------------------------------------------------------------------------
+void EPA_PACE_Replay(UsbCommand *c)
+{
+ uint32_t timings[sizeof(apdu_lengths_replay) / sizeof(apdu_lengths_replay[0])] = {0};
+
+ // if an APDU has been passed, save it
+ if (c->arg[0] != 0) {
+ // make sure it's not too big
+ if(c->arg[2] > apdus_replay[c->arg[0] - 1].len)
+ {
+ cmd_send(CMD_ACK, 1, 0, 0, NULL, 0);
+ }
+ memcpy(apdus_replay[c->arg[0] - 1].data + c->arg[1],
+ c->d.asBytes,
+ c->arg[2]);
+ // save/update APDU length
+ if (c->arg[1] == 0) {
+ apdu_lengths_replay[c->arg[0] - 1] = c->arg[2];
+ } else {
+ apdu_lengths_replay[c->arg[0] - 1] += c->arg[2];
+ }
+ cmd_send(CMD_ACK, 0, 0, 0, NULL, 0);
+ return;
+ }
+
+ // return value of a function
+ int func_return;
+
+ // set up communication
+ func_return = EPA_Setup();
+ if (func_return != 0) {
+ EPA_Finish();
+ cmd_send(CMD_ACK, 2, func_return, 0, NULL, 0);
+ 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,
+ apdu_lengths_replay[i],
+ response_apdu);
+ timings[i] = GetCountUS();
+ // every step but the last one should succeed
+ if (i < sizeof(apdu_lengths_replay) - 1
+ && (func_return < 6
+ || response_apdu[func_return - 4] != 0x90
+ || response_apdu[func_return - 3] != 0x00))
+ {
+ EPA_Finish();
+ cmd_send(CMD_ACK, 3 + i, func_return, 0, timings, 20);
+ return;
+ }
+ }
+ EPA_Finish();
+ cmd_send(CMD_ACK,0,0,0,timings,20);
+ return;
+}
+
//-----------------------------------------------------------------------------
// Set up a communication channel (Card Select, PPS)
// Returns 0 on success or a non-zero error code on failure
//-----------------------------------------------------------------------------
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();
+ // 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;
}
-
// 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;
}
-
return 0;
-}
\ No newline at end of file
+}
projects / proxmark3-svn / blobdiff