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_DESFIRE_FRAME_SIZE 60
   7 #define NOT_YET_AUTHENTICATED 255
   8 #define FRAME_PAYLOAD_SIZE (MAX_DESFIRE_FRAME_SIZE - 5)
   9 #define RECEIVE_SIZE 64
  10
  11 // the block number for the ISO14443-4 PCB
  12 uint8_t pcb_blocknum = 0;
  13 // Deselect card by sending a s-block. the crc is precalced for speed
  14 static  uint8_t deselect_cmd[] = {0xc2,0xe0,0xb4};
  15
  16 //static uint8_t __msg[MAX_FRAME_SIZE] = { 0x0A, 0x00, 0x00, /* ..., */ 0x00 };
  17 /*                                       PCB   CID   CMD    PAYLOAD    */
  18 //static uint8_t __res[MAX_FRAME_SIZE];
  19
  20 bool InitDesfireCard(){
  21
  22         // Make sure it is off.
  23 //      FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
  24 //      SpinDelay(300);
  25
  26         byte_t cardbuf[USB_CMD_DATA_SIZE];
  27         memset(cardbuf,0,sizeof(cardbuf));
  28         iso14a_card_select_t *card = (iso14a_card_select_t*)cardbuf;
  29
  30         iso14a_set_tracing(TRUE);
  31         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
  32
  33         int len = iso14443a_select_card(NULL,card,NULL);
  34
  35         if (!len) {
  36                 if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
  37                 OnError();
  38                 return false;
  39         }
  40         return true;
  41 }
  42
  43 // ARG0 flag enums
  44 enum  {
  45  NONE           =       0x00,
  46  INIT           =       0x01,
  47  DISCONNECT =   0x02,
  48  CLEARTRACE     =       0x04,
  49  BAR            =       0x08,
  50 } CmdOptions ;
  51
  52 void MifareSendCommand(uint8_t arg0, uint8_t arg1, uint8_t *datain){
  53
  54         /* ARG0 contains flags.
  55                 0x01 = init card.
  56                 0x02 = Disconnect
  57                 0x03
  58         */
  59         uint8_t flags = arg0;
  60         size_t datalen = arg1;
  61         uint8_t resp[RECEIVE_SIZE];
  62         memset(resp,0,sizeof(resp));
  63
  64         if (MF_DBGLEVEL >= 4) {
  65                 Dbprintf(" flags : %02X", flags);
  66                 Dbprintf(" len   : %02X", datalen);
  67                 print_result(" RX    : ", datain, datalen);
  68         }
  69
  70         if ( flags & CLEARTRACE ){
  71                 iso14a_clear_trace();
  72         }
  73
  74         if ( flags & INIT ){
  75                 if ( !InitDesfireCard() )
  76                         return;
  77         }
  78
  79         int len = DesfireAPDU(datain, datalen, resp);
  80         if (MF_DBGLEVEL >= 4) {
  81                 print_result("ERR <--: ", resp, len);
  82         }
  83
  84         if ( !len ) {
  85                 OnError();
  86                 return;
  87         }
  88
  89         // reset the pcb_blocknum,
  90         pcb_blocknum = 0;
  91
  92         if ( flags & DISCONNECT ){
  93                 OnSuccess();
  94         }
  95
  96         cmd_send(CMD_ACK,1,len,0,resp,len);
  97 }
  98
  99 void MifareDesfireGetInformation(){
 100
 101         int len = 0;
 102         uint8_t resp[USB_CMD_DATA_SIZE];
 103         uint8_t dataout[USB_CMD_DATA_SIZE];
 104         byte_t cardbuf[USB_CMD_DATA_SIZE];
 105
 106         memset(resp,0,sizeof(resp));
 107         memset(dataout,0, sizeof(dataout));
 108         memset(cardbuf,0,sizeof(cardbuf));
 109
 110         /*
 111                 1 = PCB                                 1
 112                 2 = cid                                 2
 113                 3 = desfire command             3
 114                 4-5 = crc                               4  key
 115                                                                 5-6 crc
 116                 PCB == 0x0A because sending CID byte.
 117                 CID == 0x00 first card?
 118         */
 119         iso14a_clear_trace();
 120         iso14a_set_tracing(TRUE);
 121         iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
 122
 123         // card select - information
 124         iso14a_card_select_t *card = (iso14a_card_select_t*)cardbuf;
 125         byte_t isOK = iso14443a_select_card(NULL, card, NULL);
 126         if ( isOK == 0) {
 127                 if (MF_DBGLEVEL >= 1) {
 128                         Dbprintf("Can't select card");
 129                 }
 130                 OnError();
 131                 return;
 132         }
 133
 134         memcpy(dataout,card->uid,7);
 135
 136         LED_A_ON();
 137         LED_B_OFF();
 138         LED_C_OFF();
 139
 140         uint8_t cmd[] = {GET_VERSION};
 141         size_t cmd_len = sizeof(cmd);
 142
 143         len =  DesfireAPDU(cmd, cmd_len, resp);
 144         if ( !len ) {
 145                 print_result("ERROR <--: ", resp, len);
 146                 OnError();
 147                 return;
 148         }
 149
 150         LED_A_OFF();
 151         LED_B_ON();
 152         memcpy(dataout+7,resp+3,7);
 153
 154         // ADDITION_FRAME 1
 155         cmd[0] = ADDITIONAL_FRAME;
 156         len =  DesfireAPDU(cmd, cmd_len, resp);
 157         if ( !len ) {
 158                 print_result("ERROR <--: ", resp, len);
 159                 OnError();
 160                 return;
 161         }
 162
 163         LED_B_OFF();
 164         LED_C_ON();
 165         memcpy(dataout+7+7,resp+3,7);
 166
 167         // ADDITION_FRAME 2
 168         len =  DesfireAPDU(cmd, cmd_len, resp);
 169         if ( !len ) {
 170                 print_result("ERROR <--: ", resp, len);
 171                 OnError();
 172                 return;
 173         }
 174
 175         memcpy(dataout+7+7+7,resp+3,14);
 176
 177         cmd_send(CMD_ACK,1,0,0,dataout,sizeof(dataout));
 178
 179         // reset the pcb_blocknum,
 180         pcb_blocknum = 0;
 181         OnSuccess();
 182 }
 183
 184 void MifareDES_Auth1(uint8_t mode, uint8_t algo, uint8_t keyno,  uint8_t *datain){
 185
 186         int len = 0;
 187         //uint8_t PICC_MASTER_KEY8[8] = { 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47};
 188         uint8_t PICC_MASTER_KEY16[16] = { 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f };
 189         uint8_t null_key_data8[8] = {0x00};
 190         //uint8_t null_key_data16[16] = {0x00};
 191         //uint8_t new_key_data8[8]  = { 0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77};
 192         //uint8_t new_key_data16[16]  = { 0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF};
 193
 194         //uint8_t* bigbuffer = get_bigbufptr_recvrespbuf();
 195         uint8_t resp[256] = {0x00};
 196         uint8_t IV[16] = {0x00};
 197
 198         size_t datalen = datain[0];
 199
 200         uint8_t cmd[40] = {0x00};
 201         uint8_t encRndB[16] = {0x00};
 202         uint8_t decRndB[16] = {0x00};
 203         uint8_t nonce[16] = {0x00};
 204         uint8_t both[32] = {0x00};
 205         uint8_t encBoth[32] = {0x00};
 206
 207         InitDesfireCard();
 208
 209         LED_A_ON();
 210         LED_B_OFF();
 211         LED_C_OFF();
 212
 213         // 3 olika sätt att authenticera.   AUTH (CRC16) , AUTH_ISO (CRC32) , AUTH_AES (CRC32)
 214         // 4 olika crypto algo   DES, 3DES, 3K3DES, AES
 215         // 3 olika kommunikations sätt,   PLAIN,MAC,CRYPTO
 216
 217         // des, nyckel 0,
 218         switch (mode){
 219         case 1:{
 220             if (algo == 1) {
 221
 222             uint8_t keybytes[8];
 223             uint8_t RndA[8] = {0x00};
 224             uint8_t RndB[8] = {0x00};
 225
 226             if (datain[1] == 0xff){
 227                 memcpy(keybytes,null_key_data8,8);
 228             } else{
 229                 memcpy(keybytes, datain+1, datalen);
 230             }
 231
 232             struct desfire_key defaultkey = {0};
 233             desfirekey_t key = &defaultkey;
 234             Desfire_des_key_new(keybytes, key);
 235
 236             cmd[0] = AUTHENTICATE;
 237             cmd[1] = keyno;  //keynumber
 238             len = DesfireAPDU(cmd, 2, resp);
 239             if ( !len ) {
 240                 if (MF_DBGLEVEL >= 1) {
 241                     DbpString("Authentication failed. Card timeout.");
 242                 }
 243                 OnError();
 244                 return;
 245             }
 246
 247             if ( resp[2] == 0xaf ){
 248             } else {
 249                 DbpString("Authetication failed. Invalid key number.");
 250                 OnError();
 251                 return;
 252             }
 253
 254             memcpy( encRndB, resp+3, 8);
 255
 256             des_dec(&decRndB, &encRndB, key->data);
 257             memcpy(RndB, decRndB, 8);
 258             rol(decRndB,8);
 259
 260             // This should be random
 261             uint8_t decRndA[8] = {0x00};
 262             memcpy(RndA, decRndA, 8);
 263             uint8_t encRndA[8] = {0x00};
 264
 265             des_dec(&encRndA, &decRndA, key->data);
 266
 267             memcpy(both, encRndA, 8);
 268
 269             for (int x = 0; x < 8; x++) {
 270                 decRndB[x] = decRndB[x] ^ encRndA[x];
 271
 272             }
 273
 274             des_dec(&encRndB, &decRndB, key->data);
 275
 276             memcpy(both + 8, encRndB, 8);
 277
 278             cmd[0] = ADDITIONAL_FRAME;
 279             memcpy(cmd+1, both, 16 );
 280
 281             len = DesfireAPDU(cmd, 17, resp);
 282             if ( !len ) {
 283                 if (MF_DBGLEVEL >= 1) {
 284                     DbpString("Authentication failed. Card timeout.");
 285                 }
 286                 OnError();
 287                 return;
 288             }
 289
 290             if ( resp[2] == 0x00 ){
 291
 292                 struct desfire_key sessionKey = {0};
 293                 desfirekey_t skey = &sessionKey;
 294                 Desfire_session_key_new( RndA, RndB , key, skey );
 295                 //print_result("SESSION : ", skey->data, 8);
 296
 297                 memcpy(encRndA, resp+3, 8);
 298                 des_dec(&encRndA, &encRndA, key->data);
 299                 rol(decRndA,8);
 300                 for (int x = 0; x < 8; x++) {
 301                     if (decRndA[x] != encRndA[x]) {
 302                         DbpString("Authetication failed. Cannot varify PICC.");
 303                         OnError();
 304                         return;
 305                     }
 306                 }
 307
 308                 //Change the selected key to a new value.
 309                 /*
 310
 311                 cmd[0] = CHANGE_KEY;
 312                 cmd[1] = keyno;
 313
 314                 uint8_t newKey[16] = {0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77};
 315
 316                 uint8_t first, second;
 317                 uint8_t buff1[8] = {0x00};
 318                 uint8_t buff2[8] = {0x00};
 319                 uint8_t buff3[8] = {0x00};
 320
 321                 memcpy(buff1,newKey, 8);
 322                 memcpy(buff2,newKey + 8, 8);
 323
 324                 ComputeCrc14443(CRC_14443_A, newKey, 16, &first, &second);
 325                 memcpy(buff3, &first, 1);
 326                 memcpy(buff3 + 1, &second, 1);
 327
 328                 des_dec(&buff1, &buff1, skey->data);
 329                 memcpy(cmd+2,buff1,8);
 330
 331                 for (int x = 0; x < 8; x++) {
 332                     buff2[x] = buff2[x] ^ buff1[x];
 333                 }
 334                 des_dec(&buff2, &buff2, skey->data);
 335                 memcpy(cmd+10,buff2,8);
 336
 337                 for (int x = 0; x < 8; x++) {
 338                     buff3[x] = buff3[x] ^ buff2[x];
 339                 }
 340                 des_dec(&buff3, &buff3, skey->data);
 341                 memcpy(cmd+18,buff3,8);
 342
 343                 // The command always times out on the first attempt, this will retry until a response
 344                 // is recieved.
 345                 len = 0;
 346                 while(!len) {
 347                     len = DesfireAPDU(cmd,26,resp);
 348                 }
 349                 */
 350
 351                 OnSuccess();
 352                 cmd_send(CMD_ACK,1,0,0,skey->data,8);
 353
 354             } else {
 355                 DbpString("Authetication failed.");
 356                 OnError();
 357                 return;
 358             }
 359
 360             }
 361             }
 362                         break;
 363                 case 2:
 364                         //SendDesfireCommand(AUTHENTICATE_ISO, &keyno, resp);
 365                         break;
 366                 case 3:{
 367
 368                         //defaultkey
 369                         uint8_t keybytes[16];
 370                         if (datain[1] == 0xff){
 371                                 memcpy(keybytes,PICC_MASTER_KEY16,16);
 372                         } else{
 373                                 memcpy(keybytes, datain+1, datalen);
 374                         }
 375
 376                         struct desfire_key defaultkey = {0};
 377                         desfirekey_t key = &defaultkey;
 378                         Desfire_aes_key_new( keybytes, key);
 379
 380                         AesCtx ctx;
 381                         if ( AesCtxIni(&ctx, IV, key->data, KEY128, CBC) < 0 ){
 382                                 if( MF_DBGLEVEL >= 4) {
 383                                         Dbprintf("AES context failed to init");
 384                                 }
 385                                 OnError();
 386                                 return;
 387                         }
 388
 389                         cmd[0] = AUTHENTICATE_AES;
 390                         cmd[1] = 0x00;  //keynumber
 391                         len = DesfireAPDU(cmd, 2, resp);
 392                         if ( !len ) {
 393                                 if (MF_DBGLEVEL >= 1) {
 394                                         DbpString("Authentication failed. Card timeout.");
 395                                 }
 396                                 OnError();
 397                                 return;
 398                         }
 399
 400                         memcpy( encRndB, resp+3, 16);
 401
 402                         // dekryptera tagnonce.
 403                         AesDecrypt(&ctx, encRndB, decRndB, 16);
 404                         rol(decRndB,16);
 405                         memcpy(both, nonce,16);
 406                         memcpy(both+16, decRndB ,16 );
 407                         AesEncrypt(&ctx, both, encBoth, 32 );
 408
 409                         cmd[0] = ADDITIONAL_FRAME;
 410                         memcpy(cmd+1, encBoth, 32 );
 411
 412                         len = DesfireAPDU(cmd, 33, resp);  // 1 + 32 == 33
 413                         if ( !len ) {
 414                                 if (MF_DBGLEVEL >= 1) {
 415                                         DbpString("Authentication failed. Card timeout.");
 416                                 }
 417                 OnError();
 418                                 return;
 419                         }
 420
 421                         if ( resp[2] == 0x00 ){
 422                                 // Create AES Session key
 423                                 struct desfire_key sessionKey = {0};
 424                                 desfirekey_t skey = &sessionKey;
 425                                 Desfire_session_key_new( nonce, decRndB , key, skey );
 426                                 print_result("SESSION : ", skey->data, 16);
 427                         } else {
 428                                 DbpString("Authetication failed.");
 429                                 OnError();
 430                                 return;
 431                         }
 432
 433                         break;
 434                 }
 435         }
 436
 437         OnSuccess();
 438         cmd_send(CMD_ACK,1,len,0,resp,len);
 439 }
 440
 441 // 3 olika ISO sätt att skicka data till DESFIRE (direkt, inkapslat, inkapslat ISO)
 442 // cmd  =  cmd bytes to send
 443 // cmd_len = length of cmd
 444 // dataout = pointer to response data array
 445 int DesfireAPDU(uint8_t *cmd, size_t cmd_len, uint8_t *dataout){
 446
 447         size_t len = 0;
 448         size_t wrappedLen = 0;
 449         uint8_t wCmd[USB_CMD_DATA_SIZE] = {0};
 450
 451         uint8_t *resp = ((uint8_t *)BigBuf) + RECV_RESP_OFFSET;
 452     uint8_t *resp_par = ((uint8_t *)BigBuf) + RECV_RESP_PAR_OFFSET;
 453
 454         wrappedLen = CreateAPDU( cmd, cmd_len, wCmd);
 455
 456         if (MF_DBGLEVEL >= 4) {
 457                 print_result("WCMD <--: ", wCmd, wrappedLen);
 458         }
 459         ReaderTransmit( wCmd, wrappedLen, NULL);
 460
 461         len = ReaderReceive(resp, resp_par);
 462
 463         if( len == 0x00 ){
 464                 if (MF_DBGLEVEL >= 4) {
 465                         Dbprintf("fukked");
 466                 }
 467                 return FALSE; //DATA LINK ERROR
 468         }
 469         // if we received an I- or R(ACK)-Block with a block number equal to the
 470         // current block number, toggle the current block number
 471         else if (len >= 4 // PCB+CID+CRC = 4 bytes
 472                  && ((resp[0] & 0xC0) == 0 // I-Block
 473                      || (resp[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
 474                  && (resp[0] & 0x01) == pcb_blocknum) // equal block numbers
 475         {
 476                 pcb_blocknum ^= 1;  //toggle next block
 477         }
 478
 479         memcpy(dataout, resp, len);
 480         return len;
 481 }
 482
 483 // CreateAPDU
 484 size_t CreateAPDU( uint8_t *datain, size_t len, uint8_t *dataout){
 485
 486         size_t cmdlen = MIN(len+4, USB_CMD_DATA_SIZE-1);
 487
 488         uint8_t cmd[cmdlen];
 489         memset(cmd, 0, cmdlen);
 490
 491         cmd[0] = 0x0A;  //  0x0A = skicka cid,  0x02 = ingen cid. Särskilda bitar //
 492         cmd[0] |= pcb_blocknum; // OR the block number into the PCB
 493         cmd[1] = 0x00;  //  CID: 0x00 //TODO: allow multiple selected cards
 494
 495         memcpy(cmd+2, datain, len);
 496         AppendCrc14443a(cmd, len+2);
 497
 498         memcpy(dataout, cmd, cmdlen);
 499
 500         return cmdlen;
 501 }
 502
 503         // crc_update(&desfire_crc32, 0, 1); /* CMD_WRITE */
 504         // crc_update(&desfire_crc32, addr, addr_sz);
 505         // crc_update(&desfire_crc32, byte, 8);
 506         // uint32_t crc = crc_finish(&desfire_crc32);
 507
 508 void OnSuccess(){
 509         pcb_blocknum = 0;
 510         ReaderTransmit(deselect_cmd, 3 , NULL);
 511         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 512         LEDsoff();
 513 }
 514
 515 void OnError(){
 516         pcb_blocknum = 0;
 517         ReaderTransmit(deselect_cmd, 3 , NULL);
 518         FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 519         cmd_send(CMD_ACK,0,0,0,0,0);
 520         LEDsoff();
 521 }