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