git.zerfleddert.de Git - proxmark3-svn/blob - armsrc/mifaredesfire.c

   1 #include "mifaredesfire.h"
   2 #include "des.h"
   3
   4 #define MAX_APPLICATION_COUNT 28
   5 #define MAX_FILE_COUNT 16
   6 #define MAX_FRAME_SIZE 60
   7 #define NOT_YET_AUTHENTICATED 255
   8 #define FRAME_PAYLOAD_SIZE (MAX_FRAME_SIZE - 5)
   9
  10 // the block number for the ISO14443-4 PCB
  11 uint8_t pcb_blocknum = 0;
  12 // Deselect card by sending a s-block. the crc is precalced for speed
  13 static  uint8_t deselect_cmd[] = {0xc2,0xe0,0xb4};
  14
  15 //static uint8_t __msg[MAX_FRAME_SIZE] = { 0x0A, 0x00, 0x00, /* ..., */ 0x00 };
  16 /*                                       PCB   CID   CMD    PAYLOAD    */
  17 //static uint8_t __res[MAX_FRAME_SIZE];
  18
  19 bool InitDesfireCard(){
  20
  21         // Make sure it is off.
  22 //      FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
  23 //      SpinDelay(300);
  24
  25         byte_t cardbuf[USB_CMD_DATA_SIZE];
  26         memset(cardbuf,0,sizeof(cardbuf));
  27
  28         iso14a_set_tracing(TRUE);
  29         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
  30
  31         iso14a_card_select_t *card = (iso14a_card_select_t*)cardbuf;
  32         int len = iso14443a_select_card(NULL,card,NULL);
  33
  34         if (!len) {
  35                 if (MF_DBGLEVEL >= 1) {
  36                         Dbprintf("Can't select card");
  37                 }
  38                 OnError();
  39                 return false;
  40         }
  41         return true;
  42 }
  43
  44 // ARG0 flag enums
  45 enum  {
  46  NONE           =       0x00,
  47  INIT           =       0x01,
  48  DISCONNECT =   0x02,
  49  CLEARTRACE     =       0x04,
  50  BAR            =       0x08,
  51 } CmdOptions ;
  52
  53 void MifareSendCommand(uint8_t arg0, uint8_t arg1, uint8_t *datain){
  54
  55         /* ARG0 contains flags.
  56                 0x01 = init card.
  57                 0x02 = Disconnect
  58                 0x03
  59         */
  60         uint8_t flags = arg0;
  61         size_t datalen = arg1;
  62         uint8_t resp[RECV_RES_SIZE];
  63         memset(resp,0,sizeof(resp));
  64
  65         if (MF_DBGLEVEL >= 4) {
  66                 Dbprintf(" flags : %02X", flags);
  67                 Dbprintf(" len   : %02X", datalen);
  68                 print_result(" RX    : ", datain, datalen);
  69         }
  70
  71         if ( flags & CLEARTRACE ){
  72                 iso14a_clear_trace();
  73         }
  74
  75         if ( flags & INIT ){
  76                 if ( !InitDesfireCard() )
  77                         return;
  78         }
  79
  80         int len = DesfireAPDU(datain, datalen, resp);
  81                 if (MF_DBGLEVEL >= 4) {
  82                         print_result("ERR <--: ", resp, len);
  83                 }
  84
  85         if ( !len ) {
  86                 OnError();
  87                 return;
  88         }
  89
  90         // reset the pcb_blocknum,
  91         pcb_blocknum = 0;
  92
  93         if ( flags & DISCONNECT ){
  94                 OnSuccess();
  95         }
  96
  97         cmd_send(CMD_ACK,1,len,0,resp,len);
  98 }
  99
 100 void MifareDesfireGetInformation(){
 101
 102         int len = 0;
 103         uint8_t resp[USB_CMD_DATA_SIZE];
 104         uint8_t dataout[USB_CMD_DATA_SIZE];
 105         byte_t cardbuf[USB_CMD_DATA_SIZE];
 106
 107         memset(resp,0,sizeof(resp));
 108         memset(dataout,0, sizeof(dataout));
 109         memset(cardbuf,0,sizeof(cardbuf));
 110
 111         /*
 112                 1 = PCB                                 1
 113                 2 = cid                                 2
 114                 3 = desfire command             3
 115                 4-5 = crc                               4  key
 116                                                                 5-6 crc
 117                 PCB == 0x0A because sending CID byte.
 118                 CID == 0x00 first card?
 119         */
 120         iso14a_clear_trace();
 121         iso14a_set_tracing(TRUE);
 122         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 123
 124         // card select - information
 125         iso14a_card_select_t *card = (iso14a_card_select_t*)cardbuf;
 126         byte_t isOK = iso14443a_select_card(NULL, card, NULL);
 127         if (isOK != 1) {
 128                 if (MF_DBGLEVEL >= 1) {
 129                         Dbprintf("Can't select card");
 130                 }
 131                 OnError();
 132                 return;
 133         }
 134
 135         memcpy(dataout,card->uid,7);
 136
 137         LED_A_ON();
 138         LED_B_OFF();
 139         LED_C_OFF();
 140
 141         uint8_t cmd[] = {GET_VERSION};
 142         size_t cmd_len = sizeof(cmd);
 143
 144         len =  DesfireAPDU(cmd, cmd_len, resp);
 145         if ( !len ) {
 146                 print_result("ERROR <--: ", resp, len);
 147                 OnError();
 148                 return;
 149         }
 150
 151         LED_A_OFF();
 152         LED_B_ON();
 153         memcpy(dataout+7,resp+3,7);
 154
 155         // ADDITION_FRAME 1
 156         cmd[0] = ADDITIONAL_FRAME;
 157         len =  DesfireAPDU(cmd, cmd_len, resp);
 158         if ( !len ) {
 159                 print_result("ERROR <--: ", resp, len);
 160                 OnError();
 161                 return;
 162         }
 163
 164         LED_B_OFF();
 165         LED_C_ON();
 166         memcpy(dataout+7+7,resp+3,7);
 167
 168         // ADDITION_FRAME 2
 169         len =  DesfireAPDU(cmd, cmd_len, resp);
 170         if ( !len ) {
 171                 print_result("ERROR <--: ", resp, len);
 172                 OnError();
 173                 return;
 174         }
 175
 176         memcpy(dataout+7+7+7,resp+3,14);
 177
 178         cmd_send(CMD_ACK,1,0,0,dataout,sizeof(dataout));
 179
 180         // reset the pcb_blocknum,
 181         pcb_blocknum = 0;
 182         OnSuccess();
 183 }
 184
 185 void MifareDES_Auth1(uint8_t mode, uint8_t algo, uint8_t keyno,  uint8_t *datain){
 186
 187         int len = 0;
 188         //uint8_t PICC_MASTER_KEY8[8] = { 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47};
 189         uint8_t PICC_MASTER_KEY16[16] = { 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f };
 190         uint8_t null_key_data8[8] = {0x00};
 191         //uint8_t null_key_data16[16] = {0x00};
 192         //uint8_t new_key_data8[8]  = { 0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77};
 193         //uint8_t new_key_data16[16]  = { 0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF};
 194
 195         //uint8_t* bigbuffer = mifare_get_bigbufptr();
 196         uint8_t resp[256] = {0x00};
 197         uint8_t IV[16] = {0x00};
 198
 199         size_t datalen = datain[0];
 200
 201         uint8_t cmd[40] = {0x00};
 202         uint8_t encRndB[16] = {0x00};
 203         uint8_t decRndB[16] = {0x00};
 204         uint8_t nonce[16] = {0x00};
 205         uint8_t both[32] = {0x00};
 206         uint8_t encBoth[32] = {0x00};
 207
 208         InitDesfireCard();
 209
 210         LED_A_ON();
 211         LED_B_OFF();
 212         LED_C_OFF();
 213
 214         // 3 olika sätt att authenticera.   AUTH (CRC16) , AUTH_ISO (CRC32) , AUTH_AES (CRC32)
 215         // 4 olika crypto algo   DES, 3DES, 3K3DES, AES
 216         // 3 olika kommunikations sätt,   PLAIN,MAC,CRYPTO
 217
 218         // des, nyckel 0,
 219         switch (mode){
 220         case 1:{
 221             uint8_t keybytes[8];
 222             if (datain[1] == 0xff){
 223                 memcpy(keybytes,null_key_data8,8);
 224             } else{
 225                 memcpy(keybytes, datain+1, datalen);
 226             }
 227
 228             cmd[0] = AUTHENTICATE;
 229             cmd[1] = keyno;  //keynumber
 230             len = DesfireAPDU(cmd, 2, resp);
 231             if ( !len ) {
 232                 if (MF_DBGLEVEL >= 1) {
 233                     DbpString("Authentication failed. Card timeout.");
 234                 }
 235                 OnError();
 236                 return;
 237             }
 238
 239             if ( resp[2] == 0xaf ){
 240             } else {
 241                 DbpString("Authetication failed. Invalid key number.");
 242                 OnError();
 243                 return;
 244             }
 245
 246             memcpy( encRndB, resp+3, 8);
 247
 248             des_dec(&decRndB, &encRndB, &keybytes);
 249             rol(decRndB,8);
 250
 251             uint8_t decRndA[8] = {0x00};
 252             uint8_t encRndA[8] = {0x00};
 253
 254             des_dec(&encRndA, &decRndA, &keybytes);
 255
 256             memcpy(both, encRndA, 8);
 257
 258             for (int x = 0; x < 8; x++) {
 259                 decRndB[x] = decRndB[x] ^ encRndA[x];
 260
 261             }
 262
 263             des_dec(&encRndB, &decRndB, &keybytes);
 264
 265             memcpy(both + 8, encRndB, 8);
 266
 267             cmd[0] = ADDITIONAL_FRAME;
 268             memcpy(cmd+1, both, 16 );
 269
 270             len = DesfireAPDU(cmd, 17, resp);
 271             if ( !len ) {
 272                 if (MF_DBGLEVEL >= 1) {
 273                     DbpString("Authentication failed. Card timeout.");
 274                 }
 275                 OnError();
 276                 return;
 277             }
 278
 279             if ( resp[2] == 0x00 ){
 280                 // TODO: Create session key.
 281             } else {
 282                 DbpString("Authetication failed.");
 283                 OnError();
 284                 return;
 285             }
 286
 287                 // TODO: Optionally, confirm ek0RndA' = RndA' to varify PICC
 288
 289             }
 290                         break;
 291                 case 2:
 292                         //SendDesfireCommand(AUTHENTICATE_ISO, &keyno, resp);
 293                         break;
 294                 case 3:{
 295
 296                         //defaultkey
 297                         uint8_t keybytes[16];
 298                         if (datain[1] == 0xff){
 299                                 memcpy(keybytes,PICC_MASTER_KEY16,16);
 300                         } else{
 301                                 memcpy(keybytes, datain+1, datalen);
 302                         }
 303
 304                         struct desfire_key defaultkey = {0};
 305                         desfirekey_t key = &defaultkey;
 306                         Desfire_aes_key_new( keybytes, key);
 307
 308                         AesCtx ctx;
 309                         if ( AesCtxIni(&ctx, IV, key->data, KEY128, CBC) < 0 ){
 310                                 if( MF_DBGLEVEL >= 4) {
 311                                         Dbprintf("AES context failed to init");
 312                                 }
 313                                 OnError();
 314                                 return;
 315                         }
 316
 317                         cmd[0] = AUTHENTICATE_AES;
 318                         cmd[1] = 0x00;  //keynumber
 319                         len = DesfireAPDU(cmd, 2, resp);
 320                         if ( !len ) {
 321                                 if (MF_DBGLEVEL >= 1) {
 322                                         DbpString("Authentication failed. Card timeout.");
 323                                 }
 324                                 OnError();
 325                                 return;
 326                         }
 327
 328                         memcpy( encRndB, resp+3, 16);
 329
 330                         // dekryptera tagnonce.
 331                         AesDecrypt(&ctx, encRndB, decRndB, 16);
 332                         rol(decRndB,16);
 333                         memcpy(both, nonce,16);
 334                         memcpy(both+16, decRndB ,16 );
 335                         AesEncrypt(&ctx, both, encBoth, 32 );
 336
 337                         cmd[0] = ADDITIONAL_FRAME;
 338                         memcpy(cmd+1, encBoth, 32 );
 339
 340                         len = DesfireAPDU(cmd, 33, resp);  // 1 + 32 == 33
 341                         if ( !len ) {
 342                                 if (MF_DBGLEVEL >= 1) {
 343                                         DbpString("Authentication failed. Card timeout.");
 344                                 }
 345                 OnError();
 346                                 return;
 347                         }
 348
 349                         if ( resp[2] == 0x00 ){
 350                                 // Create AES Session key
 351                                 struct desfire_key sessionKey = {0};
 352                                 desfirekey_t skey = &sessionKey;
 353                                 Desfire_session_key_new( nonce, decRndB , key, skey );
 354                                 print_result("SESSION : ", skey->data, 16);
 355                         } else {
 356                                 DbpString("Authetication failed.");
 357                                 OnError();
 358                                 return;
 359                         }
 360
 361                         break;
 362                 }
 363         }
 364
 365         OnSuccess();
 366         cmd_send(CMD_ACK,1,len,0,resp,len);
 367 }
 368
 369 // 3 olika ISO sätt att skicka data till DESFIRE (direkt, inkapslat, inkapslat ISO)
 370 // cmd  =  cmd bytes to send
 371 // cmd_len = length of cmd
 372 // dataout = pointer to response data array
 373 int DesfireAPDU(uint8_t *cmd, size_t cmd_len, uint8_t *dataout){
 374
 375         uint32_t status = 0;
 376         size_t wrappedLen = 0;
 377         uint8_t wCmd[USB_CMD_DATA_SIZE] = {0};
 378
 379         wrappedLen = CreateAPDU( cmd, cmd_len, wCmd);
 380
 381         if (MF_DBGLEVEL >= 4) {
 382                 print_result("WCMD <--: ", wCmd, wrappedLen);
 383         }
 384         ReaderTransmit( wCmd, wrappedLen, NULL);
 385
 386         status = ReaderReceive(dataout);
 387
 388         if( status == 0x00){
 389                 if (MF_DBGLEVEL >= 4) {
 390                         Dbprintf("fukked");
 391                 }
 392                 return FALSE; //DATA LINK ERROR
 393         }
 394         // if we received an I- or R(ACK)-Block with a block number equal to the
 395         // current block number, toggle the current block number
 396         else if (status >= 4 // PCB+CID+CRC = 4 bytes
 397                  && ((dataout[0] & 0xC0) == 0 // I-Block
 398                      || (dataout[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
 399                  && (dataout[0] & 0x01) == pcb_blocknum) // equal block numbers
 400         {
 401                 pcb_blocknum ^= 1;  //toggle next block
 402         }
 403         return status;
 404 }
 405
 406 // CreateAPDU
 407 size_t CreateAPDU( uint8_t *datain, size_t len, uint8_t *dataout){
 408
 409         size_t cmdlen = MIN(len+4, USB_CMD_DATA_SIZE-1);
 410
 411         uint8_t cmd[cmdlen];
 412         memset(cmd, 0, cmdlen);
 413
 414         cmd[0] = 0x0A;  //  0x0A = skicka cid,  0x02 = ingen cid. Särskilda bitar //
 415         cmd[0] |= pcb_blocknum; // OR the block number into the PCB
 416         cmd[1] = 0x00;  //  CID: 0x00 //FIXME: allow multiple selected cards
 417
 418         memcpy(cmd+2, datain, len);
 419         AppendCrc14443a(cmd, len+2);
 420
 421         memcpy(dataout, cmd, cmdlen);
 422
 423         return cmdlen;
 424 }
 425
 426         // crc_update(&desfire_crc32, 0, 1); /* CMD_WRITE */
 427         // crc_update(&desfire_crc32, addr, addr_sz);
 428         // crc_update(&desfire_crc32, byte, 8);
 429         // uint32_t crc = crc_finish(&desfire_crc32);
 430
 431 void OnSuccess(){
 432         pcb_blocknum = 0;
 433         ReaderTransmit(deselect_cmd, 3 , NULL);
 434         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 435         LEDsoff();
 436 }
 437
 438 void OnError(){
 439         pcb_blocknum = 0;
 440         ReaderTransmit(deselect_cmd, 3 , NULL);
 441         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 442         cmd_send(CMD_ACK,0,0,0,0,0);
 443         LEDsoff();
 444 }