#include "mifaredesfire.h"
#define MAX_APPLICATION_COUNT 28
#define MAX_FILE_COUNT 16
#define MAX_DESFIRE_FRAME_SIZE 60
#define NOT_YET_AUTHENTICATED 255
#define FRAME_PAYLOAD_SIZE (MAX_DESFIRE_FRAME_SIZE - 5)
#define RECEIVE_SIZE 64
// the block number for the ISO14443-4 PCB
uint8_t pcb_blocknum = 0;
// Deselect card by sending a s-block. the crc is precalced for speed
static uint8_t deselect_cmd[] = {0xc2,0xe0,0xb4};
//static uint8_t __msg[MAX_FRAME_SIZE] = { 0x0A, 0x00, 0x00, /* ..., */ 0x00 };
/* PCB CID CMD PAYLOAD */
//static uint8_t __res[MAX_FRAME_SIZE];
bool InitDesfireCard(){
iso14a_card_select_t card;
iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
set_tracing(true);
if (!iso14443a_select_card(NULL, &card, NULL, true, 0, false)) {
if (MF_DBGLEVEL >= MF_DBG_ERROR) DbpString("Can't select card");
OnError(1);
return false;
}
return true;
}
// ARG0 flag enums
enum {
NONE = 0x00,
INIT = 0x01,
DISCONNECT = 0x02,
CLEARTRACE = 0x04,
BAR = 0x08,
} CmdOptions ;
void MifareSendCommand(uint8_t arg0, uint8_t arg1, uint8_t *datain){
/* ARG0 contains flags.
0x01 = init card.
0x02 = Disconnect
0x03
*/
uint8_t flags = arg0;
size_t datalen = arg1;
uint8_t resp[RECEIVE_SIZE];
memset(resp,0,sizeof(resp));
if (MF_DBGLEVEL >= 4) {
Dbprintf(" flags : %02X", flags);
Dbprintf(" len : %02X", datalen);
print_result(" RX : ", datain, datalen);
}
if ( flags & CLEARTRACE )
clear_trace();
if ( flags & INIT ){
if ( !InitDesfireCard() )
return;
}
int len = DesfireAPDU(datain, datalen, resp);
if (MF_DBGLEVEL >= 4)
print_result("ERR <--: ", resp, len);
if ( !len ) {
OnError(2);
return;
}
// reset the pcb_blocknum,
pcb_blocknum = 0;
if ( flags & DISCONNECT )
OnSuccess();
cmd_send(CMD_ACK,1,len,0,resp,len);
}
void MifareDesfireGetInformation(){
int len = 0;
iso14a_card_select_t card;
uint8_t resp[USB_CMD_DATA_SIZE] = {0x00};
uint8_t dataout[USB_CMD_DATA_SIZE] = {0x00};
/*
1 = PCB 1
2 = cid 2
3 = desfire command 3
4-5 = crc 4 key
5-6 crc
PCB == 0x0A because sending CID byte.
CID == 0x00 first card?
*/
clear_trace();
set_tracing(true);
iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
// card select - information
if ( !iso14443a_select_card(NULL, &card, NULL, true, 0, false) ) {
if (MF_DBGLEVEL >= MF_DBG_ERROR) DbpString("Can't select card");
OnError(1);
return;
}
if ( card.uidlen != 7 ) {
if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Wrong UID size. Expected 7byte got %d", card.uidlen);
OnError(2);
return;
}
memcpy(dataout, card.uid, 7);
LED_A_ON();
LED_B_OFF();
LED_C_OFF();
uint8_t cmd[] = {GET_VERSION};
size_t cmd_len = sizeof(cmd);
len = DesfireAPDU(cmd, cmd_len, resp);
if ( !len ) {
print_result("ERROR <--: ", resp, len);
OnError(3);
return;
}
LED_A_OFF();
LED_B_ON();
memcpy(dataout+7,resp+3,7);
// ADDITION_FRAME 1
cmd[0] = ADDITIONAL_FRAME;
len = DesfireAPDU(cmd, cmd_len, resp);
if ( !len ) {
print_result("ERROR <--: ", resp, len);
OnError(3);
return;
}
LED_B_OFF();
LED_C_ON();
memcpy(dataout+7+7,resp+3,7);
// ADDITION_FRAME 2
len = DesfireAPDU(cmd, cmd_len, resp);
if ( !len ) {
print_result("ERROR <--: ", resp, len);
OnError(3);
return;
}
memcpy(dataout+7+7+7,resp+3,14);
cmd_send(CMD_ACK,1,0,0,dataout,sizeof(dataout));
// reset the pcb_blocknum,
pcb_blocknum = 0;
OnSuccess();
}
void MifareDES_Auth1(uint8_t mode, uint8_t algo, uint8_t keyno, uint8_t *datain){
int len = 0;
//uint8_t PICC_MASTER_KEY8[8] = { 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47};
uint8_t PICC_MASTER_KEY16[16] = { 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f };
uint8_t null_key_data8[8] = {0x00};
//uint8_t null_key_data16[16] = {0x00};
//uint8_t new_key_data8[8] = { 0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77};
//uint8_t new_key_data16[16] = { 0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF};
uint8_t resp[256] = {0x00};
uint8_t IV[16] = {0x00};
size_t datalen = datain[0];
uint8_t cmd[40] = {0x00};
uint8_t encRndB[16] = {0x00};
uint8_t decRndB[16] = {0x00};
uint8_t nonce[16] = {0x00};
uint8_t both[32] = {0x00};
uint8_t encBoth[32] = {0x00};
InitDesfireCard();
LED_A_ON();
LED_B_OFF();
LED_C_OFF();
// 3 olika s�tt att authenticera. AUTH (CRC16) , AUTH_ISO (CRC32) , AUTH_AES (CRC32)
// 4 olika crypto algo DES, 3DES, 3K3DES, AES
// 3 olika kommunikations s�tt, PLAIN,MAC,CRYPTO
// des, nyckel 0,
switch (mode){
case 1:{
uint8_t keybytes[16];
uint8_t RndA[8] = {0x00};
uint8_t RndB[8] = {0x00};
if (algo == 2) {
if (datain[1] == 0xff){
memcpy(keybytes,PICC_MASTER_KEY16,16);
} else {
memcpy(keybytes, datain+1, datalen);
}
} else {
if (algo == 1) {
if (datain[1] == 0xff){
memcpy(keybytes,null_key_data8,8);
} else{
memcpy(keybytes, datain+1, datalen);
}
}
}
struct desfire_key defaultkey = {0};
desfirekey_t key = &defaultkey;
if (algo == 2)
Desfire_3des_key_new_with_version(keybytes, key);
else if (algo ==1)
Desfire_des_key_new(keybytes, key);
cmd[0] = AUTHENTICATE;
cmd[1] = keyno; //keynumber
len = DesfireAPDU(cmd, 2, resp);
if ( !len ) {
if (MF_DBGLEVEL >= MF_DBG_ERROR) {
DbpString("Authentication failed. Card timeout.");
}
OnError(3);
return;
}
if ( resp[2] == 0xaf ){
} else {
DbpString("Authentication failed. Invalid key number.");
OnError(3);
return;
}
memcpy( encRndB, resp+3, 8);
if (algo == 2)
tdes_dec(&decRndB, &encRndB, key->data);
else if (algo == 1)
des_dec(&decRndB, &encRndB, key->data);
memcpy(RndB, decRndB, 8);
rol(decRndB,8);
// This should be random
uint8_t decRndA[8] = {0x00};
memcpy(RndA, decRndA, 8);
uint8_t encRndA[8] = {0x00};
if (algo == 2)
tdes_dec(&encRndA, &decRndA, key->data);
else if (algo == 1)
des_dec(&encRndA, &decRndA, key->data);
memcpy(both, encRndA, 8);
for (int x = 0; x < 8; x++) {
decRndB[x] = decRndB[x] ^ encRndA[x];
}
if (algo == 2)
tdes_dec(&encRndB, &decRndB, key->data);
else if (algo == 1)
des_dec(&encRndB, &decRndB, key->data);
memcpy(both + 8, encRndB, 8);
cmd[0] = ADDITIONAL_FRAME;
memcpy(cmd+1, both, 16 );
len = DesfireAPDU(cmd, 17, resp);
if ( !len ) {
if (MF_DBGLEVEL >= MF_DBG_ERROR) {
DbpString("Authentication failed. Card timeout.");
}
OnError(3);
return;
}
if ( resp[2] == 0x00 ){
struct desfire_key sessionKey = {0};
desfirekey_t skey = &sessionKey;
Desfire_session_key_new( RndA, RndB , key, skey );
//print_result("SESSION : ", skey->data, 8);
memcpy(encRndA, resp+3, 8);
if (algo == 2)
tdes_dec(&encRndA, &encRndA, key->data);
else if (algo == 1)
des_dec(&encRndA, &encRndA, key->data);
rol(decRndA,8);
for (int x = 0; x < 8; x++) {
if (decRndA[x] != encRndA[x]) {
DbpString("Authentication failed. Cannot varify PICC.");
OnError(4);
return;
}
}
//Change the selected key to a new value.
/*
// Current key is a 3DES key, change it to a DES key
if (algo == 2) {
cmd[0] = CHANGE_KEY;
cmd[1] = keyno;
uint8_t newKey[16] = {0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77};
uint8_t first, second;
uint8_t buff1[8] = {0x00};
uint8_t buff2[8] = {0x00};
uint8_t buff3[8] = {0x00};
memcpy(buff1,newKey, 8);
memcpy(buff2,newKey + 8, 8);
compute_crc(CRC_14443_A, newKey, 16, &first, &second);
memcpy(buff3, &first, 1);
memcpy(buff3 + 1, &second, 1);
tdes_dec(&buff1, &buff1, skey->data);
memcpy(cmd+2,buff1,8);
for (int x = 0; x < 8; x++) {
buff2[x] = buff2[x] ^ buff1[x];
}
tdes_dec(&buff2, &buff2, skey->data);
memcpy(cmd+10,buff2,8);
for (int x = 0; x < 8; x++) {
buff3[x] = buff3[x] ^ buff2[x];
}
tdes_dec(&buff3, &buff3, skey->data);
memcpy(cmd+18,buff3,8);
// The command always times out on the first attempt, this will retry until a response
// is recieved.
len = 0;
while(!len) {
len = DesfireAPDU(cmd,26,resp);
}
} else {
// Current key is a DES key, change it to a 3DES key
if (algo == 1) {
cmd[0] = CHANGE_KEY;
cmd[1] = keyno;
uint8_t newKey[16] = {0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f};
uint8_t first, second;
uint8_t buff1[8] = {0x00};
uint8_t buff2[8] = {0x00};
uint8_t buff3[8] = {0x00};
memcpy(buff1,newKey, 8);
memcpy(buff2,newKey + 8, 8);
compute_crc(CRC_14443_A, newKey, 16, &first, &second);
memcpy(buff3, &first, 1);
memcpy(buff3 + 1, &second, 1);
des_dec(&buff1, &buff1, skey->data);
memcpy(cmd+2,buff1,8);
for (int x = 0; x < 8; x++) {
buff2[x] = buff2[x] ^ buff1[x];
}
des_dec(&buff2, &buff2, skey->data);
memcpy(cmd+10,buff2,8);
for (int x = 0; x < 8; x++) {
buff3[x] = buff3[x] ^ buff2[x];
}
des_dec(&buff3, &buff3, skey->data);
memcpy(cmd+18,buff3,8);
// The command always times out on the first attempt, this will retry until a response
// is recieved.
len = 0;
while(!len) {
len = DesfireAPDU(cmd,26,resp);
}
}
}
*/
OnSuccess();
if (algo == 2)
cmd_send(CMD_ACK,1,0,0,skey->data,16);
else if (algo == 1)
cmd_send(CMD_ACK,1,0,0,skey->data,8);
} else {
DbpString("Authentication failed.");
OnError(6);
return;
}
}
break;
case 2:
//SendDesfireCommand(AUTHENTICATE_ISO, &keyno, resp);
break;
case 3:{
//defaultkey
uint8_t keybytes[16] = {0x00};
if (datain[1] == 0xff){
memcpy(keybytes,PICC_MASTER_KEY16,16);
} else{
memcpy(keybytes, datain+1, datalen);
}
struct desfire_key defaultkey = {0x00};
desfirekey_t key = &defaultkey;
Desfire_aes_key_new( keybytes, key);
AesCtx ctx;
if ( AesCtxIni(&ctx, IV, key->data, KEY128, CBC) < 0 ){
if( MF_DBGLEVEL >= 4) {
DbpString("AES context failed to init");
}
OnError(7);
return;
}
cmd[0] = AUTHENTICATE_AES;
cmd[1] = 0x00; //keynumber
len = DesfireAPDU(cmd, 2, resp);
if ( !len ) {
if (MF_DBGLEVEL >= MF_DBG_ERROR) {
DbpString("Authentication failed. Card timeout.");
}
OnError(3);
return;
}
memcpy( encRndB, resp+3, 16);
// dekryptera tagnonce.
AesDecrypt(&ctx, encRndB, decRndB, 16);
rol(decRndB,16);
memcpy(both, nonce,16);
memcpy(both+16, decRndB ,16 );
AesEncrypt(&ctx, both, encBoth, 32 );
cmd[0] = ADDITIONAL_FRAME;
memcpy(cmd+1, encBoth, 32 );
len = DesfireAPDU(cmd, 33, resp); // 1 + 32 == 33
if ( !len ) {
if (MF_DBGLEVEL >= MF_DBG_ERROR) {
DbpString("Authentication failed. Card timeout.");
}
OnError(3);
return;
}
if ( resp[2] == 0x00 ){
// Create AES Session key
struct desfire_key sessionKey = {0};
desfirekey_t skey = &sessionKey;
Desfire_session_key_new( nonce, decRndB , key, skey );
print_result("SESSION : ", skey->data, 16);
} else {
DbpString("Authentication failed.");
OnError(7);
return;
}
break;
}
}
OnSuccess();
cmd_send(CMD_ACK,1,len,0,resp,len);
}
// 3 olika ISO s�tt att skicka data till DESFIRE (direkt, inkapslat, inkapslat ISO)
// cmd = cmd bytes to send
// cmd_len = length of cmd
// dataout = pointer to response data array
int DesfireAPDU(uint8_t *cmd, size_t cmd_len, uint8_t *dataout){
size_t len = 0;
size_t wrappedLen = 0;
uint8_t wCmd[USB_CMD_DATA_SIZE] = {0x00};
uint8_t resp[MAX_FRAME_SIZE];
uint8_t par[MAX_PARITY_SIZE];
wrappedLen = CreateAPDU( cmd, cmd_len, wCmd);
if (MF_DBGLEVEL >= 4)
print_result("WCMD <--: ", wCmd, wrappedLen);
ReaderTransmit( wCmd, wrappedLen, NULL);
len = ReaderReceive(resp, par);
if ( !len ) {
if (MF_DBGLEVEL >= 4) Dbprintf("fukked");
return false; //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
&& ((resp[0] & 0xC0) == 0 // I-Block
|| (resp[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
&& (resp[0] & 0x01) == pcb_blocknum) // equal block numbers
{
pcb_blocknum ^= 1; //toggle next block
}
memcpy(dataout, resp, len);
return len;
}
// CreateAPDU
size_t CreateAPDU( uint8_t *datain, size_t len, uint8_t *dataout){
size_t cmdlen = MIN(len+4, USB_CMD_DATA_SIZE-1);
uint8_t cmd[cmdlen];
memset(cmd, 0, cmdlen);
cmd[0] = 0x0A; // 0x0A = skicka cid, 0x02 = ingen cid. S�rskilda bitar //
cmd[0] |= pcb_blocknum; // OR the block number into the PCB
cmd[1] = 0x00; // CID: 0x00 //TODO: allow multiple selected cards
memcpy(cmd+2, datain, len);
AddCrc14A(cmd, len+2);
memcpy(dataout, cmd, cmdlen);
return cmdlen;
}
// crc_update(&desfire_crc32, 0, 1); /* CMD_WRITE */
// crc_update(&desfire_crc32, addr, addr_sz);
// crc_update(&desfire_crc32, byte, 8);
// uint32_t crc = crc_finish(&desfire_crc32);
void OnSuccess(){
pcb_blocknum = 0;
ReaderTransmit(deselect_cmd, 3 , NULL);
mifare_ultra_halt();
switch_off();
}
void OnError(uint8_t reason){
cmd_send(CMD_ACK,0,reason,0,0,0);
OnSuccess();
}