mirror of
https://github.com/Proxmark/proxmark3.git
synced 2025-10-28 23:17:11 +08:00
3fe4ff4f03
CHG: USB_CMD_DATA_SIZE is now used as maxsize for transfer of data between client and pm3device CHG: suggested a fix for the underscore problem in ioclass\fileutils.c ADD: tnp3xx support ADD: nxp tag idents. ADD: identifiction of chinese backdoor commands to hf 14a reader.
446 lines
No EOL
14 KiB
C
446 lines
No EOL
14 KiB
C
//-----------------------------------------------------------------------------
|
|
// Frederik Möllers - August 2012
|
|
//
|
|
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
|
|
// 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)
|
|
// 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
|
|
// CRC is already included
|
|
static const uint8_t pps[] = {0xD0, 0x11, 0x00, 0x52, 0xA6};
|
|
|
|
// APDUs for communication with German Identification Card
|
|
|
|
// General Authenticate (request encrypted nonce) WITHOUT the Le at the end
|
|
static const uint8_t apdu_general_authenticate_pace_get_nonce[] = {
|
|
0x10, // CLA
|
|
0x86, // INS
|
|
0x00, // P1
|
|
0x00, // P2
|
|
0x02, // Lc
|
|
0x7C, // Type: Dynamic Authentication Data
|
|
0x00, // Length: 0 bytes
|
|
};
|
|
|
|
// MSE: Set AT (only CLA, INS, P1 and P2)
|
|
static const uint8_t apdu_mse_set_at_start[] = {
|
|
0x00, // CLA
|
|
0x22, // INS
|
|
0xC1, // P1
|
|
0xA4, // P2
|
|
};
|
|
|
|
// SELECT BINARY with the ID for EF.CardAccess
|
|
static const uint8_t apdu_select_binary_cardaccess[] = {
|
|
0x00, // CLA
|
|
0xA4, // INS
|
|
0x02, // P1
|
|
0x0C, // P2
|
|
0x02, // Lc
|
|
0x01, // ID
|
|
0x1C // ID
|
|
};
|
|
|
|
// READ BINARY
|
|
static const uint8_t apdu_read_binary[] = {
|
|
0x00, // CLA
|
|
0xB0, // INS
|
|
0x00, // P1
|
|
0x00, // P2
|
|
0x38 // Le
|
|
};
|
|
|
|
|
|
// the leading bytes of a PACE OID
|
|
static const uint8_t oid_pace_start[] = {
|
|
0x04, // itu-t, identified-organization
|
|
0x00, // etsi
|
|
0x7F, // reserved
|
|
0x00, // etsi-identified-organization
|
|
0x07, // bsi-de
|
|
0x02, // protocols
|
|
0x02, // smartcard
|
|
0x04 // id-PACE
|
|
};
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Closes the communication channel and turns off the field
|
|
//-----------------------------------------------------------------------------
|
|
void EPA_Finish()
|
|
{
|
|
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
|
|
LEDsoff();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Parses DER encoded data, e.g. from EF.CardAccess and fills out the given
|
|
// structs. If a pointer is 0, it is ignored.
|
|
// The function returns 0 on success and if an error occured, it returns the
|
|
// offset where it occured.
|
|
//
|
|
// TODO: This function can access memory outside of the given data if the DER
|
|
// encoding is broken
|
|
// TODO: Support skipping elements with a length > 0x7F
|
|
// TODO: Support OIDs with a length > 7F
|
|
// TODO: Support elements with long tags (tag is longer than 1 byte)
|
|
// TODO: Support proprietary PACE domain parameters
|
|
//-----------------------------------------------------------------------------
|
|
size_t EPA_Parse_CardAccess(uint8_t *data,
|
|
size_t length,
|
|
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;
|
|
// check for extended length
|
|
if ((data[index - 1] & 0x80) != 0) {
|
|
index += (data[index-1] & 0x7F);
|
|
}
|
|
}
|
|
// OID
|
|
else if (data[index] == 0x06) {
|
|
// is this a PACE OID?
|
|
if (data[index + 1] == 0x0A // length matches
|
|
&& memcmp(data + index + 2,
|
|
oid_pace_start,
|
|
sizeof(oid_pace_start)) == 0 // content matches
|
|
&& pace_info != NULL)
|
|
{
|
|
// first, clear the pace_info struct
|
|
memset(pace_info, 0, sizeof(pace_version_info_t));
|
|
memcpy(pace_info->oid, data + index + 2, sizeof(pace_info->oid));
|
|
// a PACE OID is followed by the version
|
|
index += data[index + 1] + 2;
|
|
if (data[index] == 02 && data[index + 1] == 01) {
|
|
pace_info->version = data[index + 2];
|
|
index += 3;
|
|
}
|
|
else {
|
|
return index;
|
|
}
|
|
// after that there might(!) be the parameter ID
|
|
if (data[index] == 02 && data[index + 1] == 01) {
|
|
pace_info->parameter_id = data[index + 2];
|
|
index += 3;
|
|
}
|
|
}
|
|
else {
|
|
// skip this OID
|
|
index += 2 + data[index + 1];
|
|
}
|
|
}
|
|
// if the length is 0, something is wrong
|
|
// TODO: This needs to be extended to support long tags
|
|
else if (data[index + 1] == 0) {
|
|
return index;
|
|
}
|
|
else {
|
|
// skip this part
|
|
// TODO: This needs to be extended to support long tags
|
|
// TODO: This needs to be extended to support unknown elements with
|
|
// a size > 0x7F
|
|
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;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Read the file EF.CardAccess and save it into a buffer (at most max_length bytes)
|
|
// Returns -1 on failure or the length of the data on success
|
|
// TODO: for the moment this sends only 1 APDU regardless of the requested length
|
|
//-----------------------------------------------------------------------------
|
|
int EPA_Read_CardAccess(uint8_t *buffer, size_t max_length)
|
|
{
|
|
// the response APDU of the card
|
|
// since the card doesn't always care for the expected length we send it,
|
|
// 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);
|
|
if (rapdu_length != 6
|
|
|| 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);
|
|
if (rapdu_length <= 6
|
|
|| 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;
|
|
to_copy = to_copy < max_length ? to_copy : max_length;
|
|
memcpy(buffer, response_apdu+2, to_copy);
|
|
return to_copy;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Abort helper function for EPA_PACE_Collect_Nonce
|
|
// sets relevant data in ack, sends the response
|
|
//-----------------------------------------------------------------------------
|
|
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;
|
|
|
|
// 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)
|
|
{
|
|
/*
|
|
* ack layout:
|
|
* arg:
|
|
* 1. element
|
|
* step where the error occured or 0 if no error occured
|
|
* 2. element
|
|
* return code of the last executed function
|
|
* d:
|
|
* Encrypted nonce
|
|
*/
|
|
|
|
// return value of a function
|
|
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(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(2, card_access_length);
|
|
return;
|
|
}
|
|
|
|
// this will hold the PACE info of the card
|
|
pace_version_info_t pace_version_info;
|
|
// search for the PACE OID
|
|
func_return = EPA_Parse_CardAccess(card_access,
|
|
card_access_length,
|
|
&pace_version_info);
|
|
if (func_return != 0 || pace_version_info.version == 0) {
|
|
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];
|
|
func_return = EPA_PACE_Get_Nonce(requested_size, nonce);
|
|
// check if the command succeeded
|
|
if (func_return < 0)
|
|
{
|
|
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);
|
|
cmd_send(CMD_ACK,0,func_return,0,nonce,func_return);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Performs the "Get Nonce" step of the PACE protocol and saves the returned
|
|
// nonce. The caller is responsible for allocating enough memory to store the
|
|
// nonce. Note that the returned size might be less or than or greater than the
|
|
// requested size!
|
|
// Returns the actual size of the nonce on success or a less-than-zero error
|
|
// code on failure.
|
|
//-----------------------------------------------------------------------------
|
|
int EPA_PACE_Get_Nonce(uint8_t requested_length, uint8_t *nonce)
|
|
{
|
|
// build the APDU
|
|
uint8_t apdu[sizeof(apdu_general_authenticate_pace_get_nonce) + 1];
|
|
// copy the constant part
|
|
memcpy(apdu,
|
|
apdu_general_authenticate_pace_get_nonce,
|
|
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,
|
|
sizeof(apdu),
|
|
response_apdu);
|
|
// check if the command succeeded
|
|
if (send_return < 6
|
|
|| response_apdu[send_return - 4] != 0x90
|
|
|| response_apdu[send_return - 3] != 0x00)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
// if there is no nonce in the RAPDU, return here
|
|
if (send_return < 10)
|
|
{
|
|
// no error
|
|
return 0;
|
|
}
|
|
// get the actual length of the nonce
|
|
uint8_t nonce_length = response_apdu[5];
|
|
if (nonce_length > send_return - 10)
|
|
{
|
|
nonce_length = send_return - 10;
|
|
}
|
|
// copy the nonce
|
|
memcpy(nonce, response_apdu + 6, nonce_length);
|
|
|
|
return nonce_length;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Initializes the PACE protocol by performing the "MSE: Set AT" step
|
|
// Returns 0 on success or a non-zero error code on failure
|
|
//-----------------------------------------------------------------------------
|
|
int EPA_PACE_MSE_Set_AT(pace_version_info_t pace_version_info, uint8_t password)
|
|
{
|
|
// create the MSE: Set AT APDU
|
|
uint8_t apdu[23];
|
|
// the minimum length (will be increased as more data is added)
|
|
size_t apdu_length = 20;
|
|
// copy the constant part
|
|
memcpy(apdu,
|
|
apdu_mse_set_at_start,
|
|
sizeof(apdu_mse_set_at_start));
|
|
// type: OID
|
|
apdu[5] = 0x80;
|
|
// length of the OID
|
|
apdu[6] = sizeof(pace_version_info.oid);
|
|
// copy the OID
|
|
memcpy(apdu + 7,
|
|
pace_version_info.oid,
|
|
sizeof(pace_version_info.oid));
|
|
// type: password
|
|
apdu[17] = 0x83;
|
|
// length: 1
|
|
apdu[18] = 1;
|
|
// password
|
|
apdu[19] = password;
|
|
// if standardized domain parameters are used, copy the ID
|
|
if (pace_version_info.parameter_id != 0) {
|
|
apdu_length += 3;
|
|
// type: domain parameter
|
|
apdu[20] = 0x84;
|
|
// length: 1
|
|
apdu[21] = 1;
|
|
// copy the parameter ID
|
|
apdu[22] = pace_version_info.parameter_id;
|
|
}
|
|
// now set Lc to the actual length
|
|
apdu[4] = apdu_length - 5;
|
|
// send it
|
|
uint8_t response_apdu[6];
|
|
int send_return = iso14_apdu(apdu,
|
|
apdu_length,
|
|
response_apdu);
|
|
// check if the command succeeded
|
|
if (send_return != 6
|
|
|| response_apdu[send_return - 4] != 0x90
|
|
|| response_apdu[send_return - 3] != 0x00)
|
|
{
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Set up a communication channel (Card Select, PPS)
|
|
// Returns 0 on success or a non-zero error code on failure
|
|
//-----------------------------------------------------------------------------
|
|
int EPA_Setup()
|
|
{
|
|
|
|
int return_code = 0;
|
|
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(FPGA_HF_ISO14443A_READER_MOD);
|
|
|
|
iso14a_set_timeout(10500);
|
|
|
|
// 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), 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;
|
|
} |