git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdanalyse.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2016 iceman
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Analyse bytes commands
   9 //-----------------------------------------------------------------------------
  10 #include "cmdanalyse.h"
  11 #include "nonce2key/nonce2key.h"
  12
  13 static int CmdHelp(const char *Cmd);
  14
  15 int usage_analyse_lcr(void) {
  16         PrintAndLog("Specifying the bytes of a UID with a known LRC will find the last byte value");
  17         PrintAndLog("needed to generate that LRC with a rolling XOR. All bytes should be specified in HEX.");
  18         PrintAndLog("");
  19         PrintAndLog("Usage:  analyse lcr [h] <bytes>");
  20         PrintAndLog("Options:");
  21         PrintAndLog("           h          This help");
  22         PrintAndLog("           <bytes>    bytes to calc missing XOR in a LCR");
  23         PrintAndLog("");
  24         PrintAndLog("Samples:");
  25         PrintAndLog("      analyse lcr 04008064BA");
  26         PrintAndLog("expected output: Target (BA) requires final LRC XOR byte value: 5A");
  27         return 0;
  28 }
  29 int usage_analyse_checksum(void) {
  30         PrintAndLog("The bytes will be added with eachother and than limited with the applied mask");
  31         PrintAndLog("Finally compute ones' complement of the least significant bytes");
  32         PrintAndLog("");
  33         PrintAndLog("Usage:  analyse chksum [h] [v] b <bytes> m <mask>");
  34         PrintAndLog("Options:");
  35         PrintAndLog("           h          This help");
  36         PrintAndLog("           v          supress header");
  37         PrintAndLog("           b <bytes>  bytes to calc missing XOR in a LCR");
  38         PrintAndLog("           m <mask>   bit mask to limit the outpuyt");
  39         PrintAndLog("");
  40         PrintAndLog("Samples:");
  41         PrintAndLog("      analyse chksum b 137AF00A0A0D m FF");
  42         PrintAndLog("expected output: 0x61");
  43         return 0;
  44 }
  45 int usage_analyse_crc(void){
  46         PrintAndLog("A stub method to test different crc implementations inside the PM3 sourcecode. Just because you figured out the poly, doesn't mean you get the desired output");
  47         PrintAndLog("");
  48         PrintAndLog("Usage:  analyse crc [h] <bytes>");
  49         PrintAndLog("Options:");
  50         PrintAndLog("           h          This help");
  51         PrintAndLog("           <bytes>    bytes to calc crc");
  52         PrintAndLog("");
  53         PrintAndLog("Samples:");
  54         PrintAndLog("      analyse crc 137AF00A0A0D");
  55         return 0;
  56 }
  57 int usage_analyse_hid(void){
  58         PrintAndLog("Permute function from 'heart of darkness' paper.");
  59         PrintAndLog("");
  60         PrintAndLog("Usage:  analyse hid [h] <r|f> <bytes>");
  61         PrintAndLog("Options:");
  62         PrintAndLog("           h          This help");
  63         PrintAndLog("           r          reverse permuted key");
  64         PrintAndLog("           f          permute key");
  65         PrintAndLog("           <bytes>    input bytes");
  66         PrintAndLog("");
  67         PrintAndLog("Samples:");
  68         PrintAndLog("      analyse hid r 0123456789abcdef");
  69         return 0;
  70 }
  71 int usage_analyse_nuid(void){
  72         PrintAndLog("Generate 4byte NUID from 7byte UID");
  73         PrintAndLog("");
  74         PrintAndLog("Usage:  analyse hid [h] <bytes>");
  75         PrintAndLog("Options:");
  76         PrintAndLog("           h          This help");
  77         PrintAndLog("           <bytes>  input bytes (14 hexsymbols)");
  78         PrintAndLog("");
  79         PrintAndLog("Samples:");
  80         PrintAndLog("      analyse nuid 11223344556677");
  81         return 0;
  82 }
  83
  84 static uint8_t calculateLRC( uint8_t* bytes, uint8_t len) {
  85     uint8_t LRC = 0;
  86     for (uint8_t i = 0; i < len; i++)
  87         LRC ^= bytes[i];
  88     return LRC;
  89 }
  90
  91 static uint16_t calcSumCrumbAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
  92     uint8_t sum = 0;
  93     for (uint8_t i = 0; i < len; i++) {
  94         sum += CRUMB(bytes[i], 0);
  95                 sum += CRUMB(bytes[i], 2);
  96                 sum += CRUMB(bytes[i], 4);
  97                 sum += CRUMB(bytes[i], 6);
  98         }
  99         sum &= mask;
 100     return sum;
 101 }
 102 static uint16_t calcSumCrumbAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
 103         return (~calcSumCrumbAdd(bytes, len, mask) & mask);
 104 }
 105 static uint16_t calcSumNibbleAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
 106     uint8_t sum = 0;
 107     for (uint8_t i = 0; i < len; i++) {
 108         sum += NIBBLE_LOW(bytes[i]);
 109                 sum += NIBBLE_HIGH(bytes[i]);
 110         }
 111         sum &= mask;
 112     return sum;
 113 }
 114 static uint16_t calcSumNibbleAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask){
 115         return (~calcSumNibbleAdd(bytes, len, mask) & mask);
 116 }
 117 static uint16_t calcSumCrumbXor(  uint8_t* bytes, uint8_t len, uint32_t mask) {
 118     uint8_t sum = 0;
 119     for (uint8_t i = 0; i < len; i++) {
 120         sum ^= CRUMB(bytes[i], 0);
 121                 sum ^= CRUMB(bytes[i], 2);
 122                 sum ^= CRUMB(bytes[i], 4);
 123                 sum ^= CRUMB(bytes[i], 6);
 124         }
 125         sum &= mask;
 126     return sum;
 127 }
 128 static uint16_t calcSumNibbleXor( uint8_t* bytes, uint8_t len, uint32_t mask) {
 129     uint8_t sum = 0;
 130     for (uint8_t i = 0; i < len; i++) {
 131         sum ^= NIBBLE_LOW(bytes[i]);
 132                 sum ^= NIBBLE_HIGH(bytes[i]);
 133         }
 134         sum &= mask;
 135     return sum;
 136 }
 137 static uint16_t calcSumByteXor( uint8_t* bytes, uint8_t len, uint32_t mask) {
 138     uint8_t sum = 0;
 139     for (uint8_t i = 0; i < len; i++)
 140         sum ^= bytes[i];
 141         sum &= mask;
 142     return sum;
 143 }
 144 static uint16_t calcSumByteAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
 145     uint8_t sum = 0;
 146     for (uint8_t i = 0; i < len; i++)
 147         sum += bytes[i];
 148         sum &= mask;
 149     return sum;
 150 }
 151 // Ones complement
 152 static uint16_t calcSumByteAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
 153         return (~calcSumByteAdd(bytes, len, mask) & mask);
 154 }
 155
 156 static uint16_t calcSumByteSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
 157     uint8_t sum = 0;
 158     for (uint8_t i = 0; i < len; i++)
 159         sum -= bytes[i];
 160         sum &= mask;
 161     return sum;
 162 }
 163 static uint16_t calcSumByteSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask){
 164         return (~calcSumByteSub(bytes, len, mask) & mask);
 165 }
 166 static uint16_t calcSumNibbleSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
 167     uint8_t sum = 0;
 168     for (uint8_t i = 0; i < len; i++) {
 169         sum -= NIBBLE_LOW(bytes[i]);
 170                 sum -= NIBBLE_HIGH(bytes[i]);
 171         }
 172         sum &= mask;
 173     return sum;
 174 }
 175 static uint16_t calcSumNibbleSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
 176         return (~calcSumNibbleSub(bytes, len, mask) & mask);
 177 }
 178
 179 // BSD shift checksum 8bit version
 180 static uint16_t calcBSDchecksum8( uint8_t* bytes, uint8_t len, uint32_t mask){
 181         uint16_t sum = 0;
 182         for(uint8_t i = 0; i < len; i++){
 183                 sum = ((sum & 0xFF) >> 1) | ((sum & 0x1) << 7);   // rotate accumulator
 184                 sum += bytes[i];  // add next byte
 185                 sum &= 0xFF;  //
 186         }
 187         sum &= mask;
 188         return sum;
 189 }
 190 // BSD shift checksum 4bit version
 191 static uint16_t calcBSDchecksum4( uint8_t* bytes, uint8_t len, uint32_t mask){
 192         uint16_t sum = 0;
 193         for(uint8_t i = 0; i < len; i++){
 194                 sum = ((sum & 0xF) >> 1) | ((sum & 0x1) << 3);   // rotate accumulator
 195                 sum += NIBBLE_HIGH(bytes[i]);  // add high nibble
 196                 sum &= 0xF;  //
 197                 sum = ((sum & 0xF) >> 1) | ((sum & 0x1) << 3);   // rotate accumulator
 198                 sum += NIBBLE_LOW(bytes[i]);  // add low nibble
 199                 sum &= 0xF;  //
 200         }
 201         sum &= mask;
 202         return sum;
 203 }
 204
 205 // measuring LFSR maximum length
 206 int CmdAnalyseLfsr(const char *Cmd){
 207
 208     uint16_t start_state = 0;  /* Any nonzero start state will work. */
 209     uint16_t lfsr = start_state;
 210     //uint32_t period = 0;
 211
 212         uint8_t iv = param_get8ex(Cmd, 0, 0, 16);
 213         uint8_t find = param_get8ex(Cmd, 1, 0, 16);
 214
 215         printf("LEGIC LFSR IV 0x%02X: \n", iv);
 216         printf(" bit# | lfsr | ^0x40 |  0x%02X ^ lfsr \n",find);
 217
 218         for (uint8_t i = 0x01; i < 0x30; i += 1) {
 219                 //period = 0;
 220                 legic_prng_init(iv);
 221                 legic_prng_forward(i);
 222                 lfsr = legic_prng_get_bits(12);
 223
 224                 printf(" %02X | %03X | %03X | %03X \n",i, lfsr, 0x40 ^ lfsr, find ^ lfsr);
 225         }
 226         return 0;
 227 }
 228 int CmdAnalyseLCR(const char *Cmd) {
 229         uint8_t data[50];
 230         char cmdp = param_getchar(Cmd, 0);
 231         if (strlen(Cmd) == 0|| cmdp == 'h' || cmdp == 'H') return usage_analyse_lcr();
 232
 233         int len = 0;
 234         param_gethex_ex(Cmd, 0, data, &len);
 235         if ( len%2 ) return usage_analyse_lcr();
 236         len >>= 1;
 237         uint8_t finalXor = calculateLRC(data, len);
 238         PrintAndLog("Target [%02X] requires final LRC XOR byte value: 0x%02X",data[len-1] ,finalXor);
 239         return 0;
 240 }
 241 int CmdAnalyseCRC(const char *Cmd) {
 242
 243         char cmdp = param_getchar(Cmd, 0);
 244         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_analyse_crc();
 245
 246         int len = strlen(Cmd);
 247         if ( len & 1 ) return usage_analyse_crc();
 248
 249         // add 1 for null terminator.
 250         uint8_t *data = malloc(len+1);
 251         if ( data == NULL ) return 1;
 252
 253         if ( param_gethex(Cmd, 0, data, len)) {
 254                 free(data);
 255                 return usage_analyse_crc();
 256         }
 257         len >>= 1;
 258
 259         //PrintAndLog("\nTests with '%s' hex bytes", sprint_hex(data, len));
 260
 261         PrintAndLog("\nTests of reflection. Two current methods in source code");
 262         PrintAndLog("   reflect(0x3e23L,3) is %04X == 0x3e26", reflect(0x3e23L,3) );
 263         PrintAndLog("  SwapBits(0x3e23L,3) is %04X == 0x3e26", SwapBits(0x3e23L,3) );
 264         PrintAndLog("  0xB400 == %04X", reflect( (1 << 16 | 0xb400),16) );
 265
 266         //
 267         // Test of CRC16,  '123456789' string.
 268         //
 269         PrintAndLog("\nTests with '123456789' string");
 270         uint8_t dataStr[] = { 0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39 };
 271         uint8_t legic8 = CRC8Legic(dataStr, sizeof(dataStr));
 272
 273         PrintAndLog("LEGIC: CRC16: %X", CRC16Legic(dataStr, sizeof(dataStr), legic8));
 274
 275         //these below has been tested OK.
 276         PrintAndLog("Confirmed CRC Implementations");
 277         PrintAndLog("LEGIC: CRC8 : %X (0xC6 expected)", legic8);
 278         PrintAndLog("MAXIM: CRC8 : %X (0xA1 expected)", CRC8Maxim(dataStr, sizeof(dataStr)));
 279         PrintAndLog("DNP  : CRC16: %X (0x82EA expected)", CRC16_DNP(dataStr, sizeof(dataStr)));
 280         PrintAndLog("CCITT: CRC16: %X (0xE5CC expected)", CRC16_CCITT(dataStr, sizeof(dataStr)));
 281
 282         PrintAndLog("ICLASS org: CRC16: %X (0x expected)",iclass_crc16( (char*)dataStr, sizeof(dataStr)));
 283         PrintAndLog("ICLASS ice: CRC16: %X (0x expected)",CRC16_ICLASS(dataStr, sizeof(dataStr)));
 284
 285
 286
 287         uint8_t dataStr1234[] = { 0x1,0x2,0x3,0x4};
 288         PrintAndLog("ISO15693 org:  : CRC16: %X (0xF0B8 expected)", Iso15693Crc(dataStr1234, sizeof(dataStr1234)));
 289         PrintAndLog("ISO15693 ice:  : CRC16: %X (0xF0B8 expected)", CRC16_Iso15693(dataStr1234, sizeof(dataStr1234)));
 290
 291         free(data);
 292         return 0;
 293 }
 294 int CmdAnalyseCHKSUM(const char *Cmd){
 295
 296         uint8_t data[50];
 297         uint8_t cmdp = 0;
 298         uint32_t mask = 0xFFFF;
 299         bool errors = false;
 300         bool useHeader = false;
 301         int len = 0;
 302         memset(data, 0x0, sizeof(data));
 303
 304         while(param_getchar(Cmd, cmdp) != 0x00) {
 305                 switch(param_getchar(Cmd, cmdp)) {
 306                 case 'b':
 307                 case 'B':
 308                         param_gethex_ex(Cmd, cmdp+1, data, &len);
 309                         if ( len%2 ) errors = true;
 310                         len >>= 1;
 311                         cmdp += 2;
 312                         break;
 313                 case 'm':
 314                 case 'M':
 315                         mask = param_get32ex(Cmd, cmdp+1, 0, 16);
 316                         cmdp += 2;
 317                         break;
 318                 case 'v':
 319                 case 'V':
 320                         useHeader = true;
 321                         cmdp++;
 322                         break;
 323                 case 'h':
 324                 case 'H':
 325                         return usage_analyse_checksum();
 326                 default:
 327                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 328                         errors = true;
 329                         break;
 330                 }
 331                 if(errors) break;
 332         }
 333         //Validations
 334         if(errors) return usage_analyse_checksum();
 335
 336         if (useHeader) {
 337                 PrintAndLog("     add          | sub         | add 1's compl    | sub 1's compl   | xor");
 338                 PrintAndLog("byte nibble crumb | byte nibble | byte nibble cumb | byte nibble     | byte nibble cumb |  BSD       |");
 339                 PrintAndLog("------------------+-------------+------------------+-----------------+--------------------");
 340         }
 341         PrintAndLog("0x%X 0x%X   0x%X  | 0x%X 0x%X   | 0x%X 0x%X   0x%X | 0x%X 0x%X       | 0x%X 0x%X   0x%X  | 0x%X  0x%X |\n",
 342                                   calcSumByteAdd(data, len, mask)
 343                                 , calcSumNibbleAdd(data, len, mask)
 344                                 , calcSumCrumbAdd(data, len, mask)
 345                                 , calcSumByteSub(data, len, mask)
 346                                 , calcSumNibbleSub(data, len, mask)
 347                                 , calcSumByteAddOnes(data, len, mask)
 348                                 , calcSumNibbleAddOnes(data, len, mask)
 349                                 , calcSumCrumbAddOnes(data, len, mask)
 350                                 , calcSumByteSubOnes(data, len, mask)
 351                                 , calcSumNibbleSubOnes(data, len, mask)
 352                                 , calcSumByteXor(data, len, mask)
 353                                 , calcSumNibbleXor(data, len, mask)
 354                                 , calcSumCrumbXor(data, len, mask)
 355                                 , calcBSDchecksum8(data, len, mask)
 356                                 , calcBSDchecksum4(data, len, mask)
 357                         );
 358         return 0;
 359 }
 360
 361 int CmdAnalyseDates(const char *Cmd){
 362         // look for datestamps in a given array of bytes
 363         PrintAndLog("To be implemented. Feel free to contribute!");
 364         return 0;
 365 }
 366 int CmdAnalyseTEASelfTest(const char *Cmd){
 367
 368         uint8_t v[8], v_le[8];
 369         memset(v, 0x00, sizeof(v));
 370         memset(v_le, 0x00, sizeof(v_le));
 371         uint8_t* v_ptr = v_le;
 372
 373         uint8_t cmdlen = strlen(Cmd);
 374         cmdlen = ( sizeof(v)<<2 < cmdlen ) ? sizeof(v)<<2 : cmdlen;
 375
 376         if ( param_gethex(Cmd, 0, v, cmdlen) > 0 ){
 377                 PrintAndLog("can't read hex chars, uneven? :: %u", cmdlen);
 378                 return 1;
 379         }
 380
 381         SwapEndian64ex(v , 8, 4, v_ptr);
 382
 383         // ENCRYPTION KEY:
 384         uint8_t key[16] = {0x55,0xFE,0xF6,0x30,0x62,0xBF,0x0B,0xC1,0xC9,0xB3,0x7C,0x34,0x97,0x3E,0x29,0xFB };
 385         uint8_t keyle[16];
 386         uint8_t* key_ptr = keyle;
 387         SwapEndian64ex(key , sizeof(key), 4, key_ptr);
 388
 389         PrintAndLog("TEST LE enc| %s", sprint_hex(v_ptr, 8));
 390
 391         tea_decrypt(v_ptr, key_ptr);
 392         PrintAndLog("TEST LE dec | %s", sprint_hex_ascii(v_ptr, 8));
 393
 394         tea_encrypt(v_ptr, key_ptr);
 395         tea_encrypt(v_ptr, key_ptr);
 396         PrintAndLog("TEST enc2 | %s", sprint_hex_ascii(v_ptr, 8));
 397
 398         return 0;
 399 }
 400
 401 int CmdAnalyseA(const char *Cmd){
 402 /*
 403 piwi
 404 // uid(2e086b1a) nt(230736f6) ks(0b0008000804000e) nr(000000000)
 405 // uid(2e086b1a) nt(230736f6) ks(0e0b0e0b090c0d02) nr(000000001)
 406 // uid(2e086b1a) nt(230736f6) ks(0e05060e01080b08) nr(000000002)
 407 uint64_t d1[] = {0x2e086b1a, 0x230736f6, 0x0000001, 0x0e0b0e0b090c0d02};
 408 uint64_t d2[] = {0x2e086b1a, 0x230736f6, 0x0000002, 0x0e05060e01080b08};
 409
 410 // uid(17758822) nt(c0c69e59) ks(080105020705040e) nr(00000001)
 411 // uid(17758822) nt(c0c69e59) ks(01070a05050c0705) nr(00000002)
 412 uint64_t d1[] = {0x17758822, 0xc0c69e59, 0x0000001, 0x080105020705040e};
 413 uint64_t d2[] = {0x17758822, 0xc0c69e59, 0x0000002, 0x01070a05050c0705};
 414
 415 // uid(6e442129) nt(8f699195) ks(090d0b0305020f02) nr(00000001)
 416 // uid(6e442129) nt(8f699195) ks(03030508030b0c0e) nr(00000002)
 417 // uid(6e442129) nt(8f699195) ks(02010f030c0d050d) nr(00000003)
 418 // uid(6e442129) nt(8f699195) ks(00040f0f0305030e) nr(00000004)
 419 uint64_t d1[] = {0x6e442129, 0x8f699195, 0x0000001, 0x090d0b0305020f02};
 420 uint64_t d2[] = {0x6e442129, 0x8f699195, 0x0000004, 0x00040f0f0305030e};
 421
 422 uid(3e172b29) nt(039b7bd2) ks(0c0e0f0505080800) nr(00000001)
 423 uid(3e172b29) nt(039b7bd2) ks(0e06090d03000b0f) nr(00000002)
 424 */
 425         uint64_t key = 0;
 426         uint64_t d1[] = {0x3e172b29, 0x039b7bd2, 0x0000001, 0x0c0e0f0505080800};
 427         uint64_t d2[] = {0x3e172b29, 0x039b7bd2, 0x0000002, 0x0e06090d03000b0f};
 428
 429         nonce2key_ex(0, 0 , d1[0], d1[1], d1[2], d1[3], &key);
 430         nonce2key_ex(0, 0 , d2[0], d2[1], d2[2], d2[3], &key);
 431         return 0;
 432 }
 433
 434 static void permute(uint8_t *data, uint8_t len, uint8_t *output){
 435 #define KEY_SIZE 8
 436
 437         if ( len > KEY_SIZE ) {
 438                 for(uint8_t m = 0; m < len; m += KEY_SIZE){
 439                         permute(data+m, KEY_SIZE, output+m);
 440                 }
 441                 return;
 442         }
 443         if ( len != KEY_SIZE ) {
 444                 printf("wrong key size\n");
 445                 return;
 446         }
 447         uint8_t i,j,p, mask;
 448         for( i=0; i < KEY_SIZE; ++i){
 449                 p = 0;
 450                 mask = 0x80 >> i;
 451                 for( j=0; j < KEY_SIZE; ++j){
 452                         p >>= 1;
 453                         if (data[j] & mask)
 454                                 p |= 0x80;
 455                 }
 456                 output[i] = p;
 457         }
 458 }
 459 static void permute_rev(uint8_t *data, uint8_t len, uint8_t *output){
 460         permute(data, len, output);
 461         permute(output, len, data);
 462         permute(data, len, output);
 463 }
 464 static void simple_crc(uint8_t *data, uint8_t len, uint8_t *output){
 465         uint8_t crc = 0;
 466         for( uint8_t i=0; i < len; ++i){
 467                 // seventh byte contains the crc.
 468                 if ( (i & 0x7) == 0x7 ) {
 469                         output[i] = crc ^ 0xFF;
 470                         crc = 0;
 471                 } else {
 472                         output[i] = data[i];
 473                         crc ^= data[i];
 474                 }
 475         }
 476 }
 477 // DES doesn't use the MSB.
 478 static void shave(uint8_t *data, uint8_t len){
 479         for (uint8_t i=0; i<len; ++i)
 480                 data[i] &= 0xFE;
 481 }
 482 static void generate_rev(uint8_t *data, uint8_t len) {
 483         uint8_t *key = calloc(len,1);
 484         printf("input permuted key | %s \n", sprint_hex(data, len));
 485         permute_rev(data, len, key);
 486         printf("    unpermuted key | %s \n", sprint_hex(key, len));
 487         shave(key, len);
 488         printf("               key | %s \n", sprint_hex(key, len));
 489         free(key);
 490 }
 491 static void generate(uint8_t *data, uint8_t len) {
 492         uint8_t *key = calloc(len,1);
 493         uint8_t *pkey = calloc(len,1);
 494         printf("    input key | %s \n", sprint_hex(data, len));
 495         permute(data, len, pkey);
 496         printf(" permuted key | %s \n", sprint_hex(pkey, len));
 497         simple_crc(pkey, len, key );
 498         printf("   CRC'ed key | %s \n", sprint_hex(key, len));
 499         free(key);
 500         free(pkey);
 501 }
 502 int CmdAnalyseHid(const char *Cmd){
 503
 504         uint8_t key[8] = {0};
 505         uint8_t key_std_format[8] = {0};
 506         uint8_t key_iclass_format[8] = {0};
 507         uint8_t data[16] = {0};
 508         bool isReverse = FALSE;
 509         int len = 0;
 510         char cmdp = param_getchar(Cmd, 0);
 511         if (strlen(Cmd) == 0|| cmdp == 'h' || cmdp == 'H') return usage_analyse_hid();
 512
 513         if ( cmdp == 'r' || cmdp == 'R' )
 514                 isReverse = TRUE;
 515
 516         param_gethex_ex(Cmd, 1, data, &len);
 517         if ( len%2 ) return usage_analyse_hid();
 518
 519         len >>= 1;
 520
 521         memcpy(key, data, 8);
 522
 523         if ( isReverse ) {
 524                 generate_rev(data, len);
 525                 permutekey_rev(key, key_std_format);
 526                 printf(" holiman iclass key | %s \n", sprint_hex(key_std_format, 8));
 527         }
 528         else {
 529                 generate(data, len);
 530                 permutekey(key, key_iclass_format);
 531                 printf(" holiman std key | %s \n", sprint_hex(key_iclass_format, 8));
 532         }
 533         return 0;
 534 }
 535
 536 void generate4bNUID(uint8_t *uid, uint8_t *nuid){
 537         uint16_t crc;
 538         uint8_t first, second;
 539
 540         ComputeCrc14443(CRC_14443_A, uid, 3, &first, &second);
 541         nuid[0] |= (second & 0xE0) | 0xF;
 542         nuid[1] = first;
 543
 544         crc = first;
 545         crc |= second << 8;
 546
 547         UpdateCrc14443(uid[3], &crc);
 548         UpdateCrc14443(uid[4], &crc);
 549         UpdateCrc14443(uid[5], &crc);
 550         UpdateCrc14443(uid[6], &crc);
 551
 552         nuid[2] = (crc >> 8) & 0xFF ;
 553         nuid[3] = crc & 0xFF;
 554 }
 555
 556 int CmdAnalyseNuid(const char *Cmd){
 557         uint8_t nuid[4] = {0};
 558         uint8_t uid[7] = {0};
 559         int len = 0;
 560         char cmdp = param_getchar(Cmd, 0);
 561         if (strlen(Cmd) == 0|| cmdp == 'h' || cmdp == 'H') return usage_analyse_nuid();
 562
 563         /* selftest  UID 040D681AB52281  -> NUID 8F430FEF */
 564         if (cmdp == 't' || cmdp == 'T') {
 565                 memcpy(uid, "\x04\x0d\x68\x1a\xb5\x22\x81", 7);
 566                 generate4bNUID(uid, nuid);
 567                 if ( 0 == memcmp(nuid, "\x8f\x43\x0f\xef", 4))
 568                         printf("Selftest OK\n");
 569                 else
 570                         printf("Selftest Failed\n");
 571                 return 0;
 572         }
 573
 574         param_gethex_ex(Cmd, 0, uid, &len);
 575         if ( len%2  || len != 14) return usage_analyse_nuid();
 576
 577         generate4bNUID(uid, nuid);
 578
 579         printf("UID  | %s \n", sprint_hex(uid, 7));
 580         printf("NUID | %s \n", sprint_hex(nuid, 4));
 581         return 0;
 582 }
 583 static command_t CommandTable[] = {
 584         {"help",        CmdHelp,            1, "This help"},
 585         {"lcr",         CmdAnalyseLCR,          1, "Generate final byte for XOR LRC"},
 586         {"crc",         CmdAnalyseCRC,          1, "Stub method for CRC evaluations"},
 587         {"chksum",      CmdAnalyseCHKSUM,       1, "Checksum with adding, masking and one's complement"},
 588         {"dates",       CmdAnalyseDates,        1, "Look for datestamps in a given array of bytes"},
 589         {"tea",         CmdAnalyseTEASelfTest,  1, "Crypto TEA test"},
 590         {"lfsr",        CmdAnalyseLfsr,         1,      "LFSR tests"},
 591         {"a",           CmdAnalyseA,            1,      "num bits test"},
 592         {"hid",         CmdAnalyseHid,          1,      "Permute function from 'heart of darkness' paper"},
 593         {"nuid",        CmdAnalyseNuid,         1,      "create NUID from 7byte UID"},
 594         {NULL, NULL, 0, NULL}
 595 };
 596
 597 int CmdAnalyse(const char *Cmd) {
 598         clearCommandBuffer();
 599         CmdsParse(CommandTable, Cmd);
 600         return 0;
 601 }
 602
 603 int CmdHelp(const char *Cmd) {
 604         CmdsHelp(CommandTable);
 605         return 0;
 606 }