cvs.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 uint8_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 uint8_t calcSumCrumbAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
  90         return ~calcSumCrumbAdd(bytes, len, mask);
  91 }
  92 static uint8_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 uint8_t calcSumNibbleAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask){
 102         return ~calcSumNibbleAdd(bytes, len, mask);
 103 }
 104 static uint8_t calcSumNibbleXor( 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 ^= NIBBLE_LOW(bytes[i]);
 108                 sum ^= NIBBLE_HIGH(bytes[i]);
 109         }
 110         sum &= mask;
 111     return sum;
 112 }
 113 static uint8_t calcSumByteXor( uint8_t* bytes, uint8_t len, uint32_t mask) {
 114     uint8_t sum = 0;
 115     for (uint8_t i = 0; i < len; i++)
 116         sum ^= bytes[i];
 117         sum &= mask;
 118     return sum;
 119 }
 120
 121 static uint8_t calcSumByteAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
 122     uint8_t sum = 0;
 123     for (uint8_t i = 0; i < len; i++)
 124         sum += bytes[i];
 125         sum &= mask;
 126     return sum;
 127 }
 128 // Ones complement
 129 static uint8_t calcSumByteAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
 130         return ~calcSumByteAdd(bytes, len, mask);
 131 }
 132
 133
 134
 135 static uint8_t calcSumByteSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
 136     uint8_t sum = 0;
 137     for (uint8_t i = 0; i < len; i++)
 138         sum -= bytes[i];
 139         sum &= mask;
 140     return sum;
 141 }
 142 static uint8_t calcSumByteSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask){
 143         return ~calcSumByteSub(bytes, len, mask);
 144 }
 145 static uint8_t calcSumNibbleSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
 146     uint8_t sum = 0;
 147     for (uint8_t i = 0; i < len; i++) {
 148         sum -= NIBBLE_LOW(bytes[i]);
 149                 sum -= NIBBLE_HIGH(bytes[i]);
 150         }
 151         sum &= mask;
 152     return sum;
 153 }
 154 static uint8_t calcSumNibbleSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
 155         return ~calcSumNibbleSub(bytes, len, mask);
 156 }
 157
 158 // measuring LFSR maximum length
 159 int CmdAnalyseLfsr(const char *Cmd){
 160
 161     uint16_t start_state = 0;  /* Any nonzero start state will work. */
 162     uint16_t lfsr = start_state;
 163     //uint32_t period = 0;
 164
 165         uint8_t iv = param_get8ex(Cmd, 0, 0, 16);
 166         uint8_t find = param_get8ex(Cmd, 1, 0, 16);
 167
 168         printf("LEGIC LFSR IV 0x%02X: \n", iv);
 169         printf(" bit# | lfsr | ^0x40 |  0x%02X ^ lfsr \n",find);
 170
 171         for (uint8_t i = 0x01; i < 0x30; i += 1) {
 172                 //period = 0;
 173                 legic_prng_init(iv);
 174                 legic_prng_forward(i);
 175                 lfsr = legic_prng_get_bits(12);
 176
 177                 printf(" %02X | %03X | %03X | %03X \n",i, lfsr, 0x40 ^ lfsr, find ^ lfsr);
 178         }
 179         return 0;
 180 }
 181 int CmdAnalyseLCR(const char *Cmd) {
 182         uint8_t data[50];
 183         char cmdp = param_getchar(Cmd, 0);
 184         if (strlen(Cmd) == 0|| cmdp == 'h' || cmdp == 'H') return usage_analyse_lcr();
 185
 186         int len = 0;
 187         param_gethex_ex(Cmd, 0, data, &len);
 188         if ( len%2 ) return usage_analyse_lcr();
 189         len >>= 1;
 190         uint8_t finalXor = calculateLRC(data, len);
 191         PrintAndLog("Target [%02X] requires final LRC XOR byte value: 0x%02X",data[len-1] ,finalXor);
 192         return 0;
 193 }
 194 int CmdAnalyseCRC(const char *Cmd) {
 195
 196         char cmdp = param_getchar(Cmd, 0);
 197         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_analyse_crc();
 198
 199         int len = strlen(Cmd);
 200         if ( len & 1 ) return usage_analyse_crc();
 201
 202         // add 1 for null terminator.
 203         uint8_t *data = malloc(len+1);
 204         if ( data == NULL ) return 1;
 205
 206         if ( param_gethex(Cmd, 0, data, len)) {
 207                 free(data);
 208                 return usage_analyse_crc();
 209         }
 210         len >>= 1;
 211
 212         //PrintAndLog("\nTests with '%s' hex bytes", sprint_hex(data, len));
 213
 214         PrintAndLog("\nTests of reflection. Two current methods in source code");
 215         PrintAndLog("   reflect(0x3e23L,3) is %04X == 0x3e26", reflect(0x3e23L,3) );
 216         PrintAndLog("  SwapBits(0x3e23L,3) is %04X == 0x3e26", SwapBits(0x3e23L,3) );
 217         PrintAndLog("  0xB400 == %04X", reflect( (1 << 16 | 0xb400),16) );
 218
 219         //
 220         // Test of CRC16,  '123456789' string.
 221         //
 222         PrintAndLog("\nTests with '123456789' string");
 223         uint8_t dataStr[] = { 0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39 };
 224         uint8_t legic8 = CRC8Legic(dataStr, sizeof(dataStr));
 225
 226         PrintAndLog("LEGIC: CRC16: %X", CRC16Legic(dataStr, sizeof(dataStr), legic8));
 227
 228         //these below has been tested OK.
 229         PrintAndLog("Confirmed CRC Implementations");
 230         PrintAndLog("LEGIC: CRC8 : %X (0xC6 expected)", legic8);
 231         PrintAndLog("MAXIM: CRC8 : %X (0xA1 expected)", CRC8Maxim(dataStr, sizeof(dataStr)));
 232         PrintAndLog("DNP  : CRC16: %X (0x82EA expected)", CRC16_DNP(dataStr, sizeof(dataStr)));
 233         PrintAndLog("CCITT: CRC16: %X (0xE5CC expected)", CRC16_CCITT(dataStr, sizeof(dataStr)));
 234
 235         PrintAndLog("ICLASS org: CRC16: %X (0x expected)",iclass_crc16( (char*)dataStr, sizeof(dataStr)));
 236         PrintAndLog("ICLASS ice: CRC16: %X (0x expected)",CRC16_ICLASS(dataStr, sizeof(dataStr)));
 237
 238
 239
 240         uint8_t dataStr1234[] = { 0x1,0x2,0x3,0x4};
 241         PrintAndLog("ISO15693 org:  : CRC16: %X (0xF0B8 expected)", Iso15693Crc(dataStr1234, sizeof(dataStr1234)));
 242         PrintAndLog("ISO15693 ice:  : CRC16: %X (0xF0B8 expected)", CRC16_Iso15693(dataStr1234, sizeof(dataStr1234)));
 243
 244         free(data);
 245         return 0;
 246 }
 247 int CmdAnalyseCHKSUM(const char *Cmd){
 248
 249         uint8_t data[50];
 250         uint8_t cmdp = 0;
 251         uint32_t mask = 0xFF;
 252         bool errors = false;
 253         int len = 0;
 254         memset(data, 0x0, sizeof(data));
 255
 256         while(param_getchar(Cmd, cmdp) != 0x00) {
 257                 switch(param_getchar(Cmd, cmdp)) {
 258                 case 'b':
 259                 case 'B':
 260                         param_gethex_ex(Cmd, cmdp+1, data, &len);
 261                         if ( len%2 ) errors = true;
 262                         len >>= 1;
 263                         cmdp += 2;
 264                         break;
 265                 case 'm':
 266                 case 'M':
 267                         mask = param_get32ex(Cmd, cmdp+1, 0, 16);
 268                         cmdp += 2;
 269                         break;
 270                 case 'h':
 271                 case 'H':
 272                         return usage_analyse_checksum();
 273                 default:
 274                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 275                         errors = true;
 276                         break;
 277                 }
 278                 if(errors) break;
 279         }
 280         //Validations
 281         if(errors) return usage_analyse_checksum();
 282
 283         PrintAndLog("\nByte Add        | 0x%X", calcSumByteAdd(data, len, mask));
 284         PrintAndLog("Nibble Add      | 0x%X", calcSumNibbleAdd(data, len, mask));
 285         PrintAndLog("Crumb Add       | 0x%X", calcSumCrumbAdd(data, len, mask));
 286
 287         PrintAndLog("\nByte Subtract   | 0x%X", calcSumByteSub(data, len, mask));
 288         PrintAndLog("Nibble Subtract | 0x%X", calcSumNibbleSub(data, len, mask));
 289
 290         PrintAndLog("\nCHECKSUM - One's complement");
 291         PrintAndLog("Byte Add        | 0x%X", calcSumByteAddOnes(data, len, mask));
 292         PrintAndLog("Nibble Add      | 0x%X", calcSumNibbleAddOnes(data, len, mask));
 293         PrintAndLog("Crumb Add       | 0x%X", calcSumCrumbAddOnes(data, len, mask));
 294
 295         PrintAndLog("Byte Subtract   | 0x%X", calcSumByteSubOnes(data, len, mask));
 296         PrintAndLog("Nibble Subtract | 0x%X", calcSumNibbleSubOnes(data, len, mask));
 297
 298         PrintAndLog("\nXOR");
 299         PrintAndLog("Byte Xor   | 0x%X", calcSumByteXor(data, len, mask));
 300         PrintAndLog("Nibble Xor   | 0x%X", calcSumNibbleXor(data, len, mask));
 301
 302         return 0;
 303 }
 304
 305 int CmdAnalyseDates(const char *Cmd){
 306         // look for datestamps in a given array of bytes
 307         PrintAndLog("To be implemented. Feel free to contribute!");
 308         return 0;
 309 }
 310 int CmdAnalyseTEASelfTest(const char *Cmd){
 311
 312         uint8_t v[8], v_le[8];
 313         memset(v, 0x00, sizeof(v));
 314         memset(v_le, 0x00, sizeof(v_le));
 315         uint8_t* v_ptr = v_le;
 316
 317         uint8_t cmdlen = strlen(Cmd);
 318         cmdlen = ( sizeof(v)<<2 < cmdlen ) ? sizeof(v)<<2 : cmdlen;
 319
 320         if ( param_gethex(Cmd, 0, v, cmdlen) > 0 ){
 321                 PrintAndLog("can't read hex chars, uneven? :: %u", cmdlen);
 322                 return 1;
 323         }
 324
 325         SwapEndian64ex(v , 8, 4, v_ptr);
 326
 327         // ENCRYPTION KEY:
 328         uint8_t key[16] = {0x55,0xFE,0xF6,0x30,0x62,0xBF,0x0B,0xC1,0xC9,0xB3,0x7C,0x34,0x97,0x3E,0x29,0xFB };
 329         uint8_t keyle[16];
 330         uint8_t* key_ptr = keyle;
 331         SwapEndian64ex(key , sizeof(key), 4, key_ptr);
 332
 333         PrintAndLog("TEST LE enc| %s", sprint_hex(v_ptr, 8));
 334
 335         tea_decrypt(v_ptr, key_ptr);
 336         PrintAndLog("TEST LE dec | %s", sprint_hex_ascii(v_ptr, 8));
 337
 338         tea_encrypt(v_ptr, key_ptr);
 339         tea_encrypt(v_ptr, key_ptr);
 340         PrintAndLog("TEST enc2 | %s", sprint_hex_ascii(v_ptr, 8));
 341
 342         return 0;
 343 }
 344
 345 int CmdAnalyseA(const char *Cmd){
 346 /*
 347 piwi
 348 // uid(2e086b1a) nt(230736f6) ks(0b0008000804000e) nr(000000000)
 349 // uid(2e086b1a) nt(230736f6) ks(0e0b0e0b090c0d02) nr(000000001)
 350 // uid(2e086b1a) nt(230736f6) ks(0e05060e01080b08) nr(000000002)
 351 uint64_t d1[] = {0x2e086b1a, 0x230736f6, 0x0000001, 0x0e0b0e0b090c0d02};
 352 uint64_t d2[] = {0x2e086b1a, 0x230736f6, 0x0000002, 0x0e05060e01080b08};
 353
 354 // uid(17758822) nt(c0c69e59) ks(080105020705040e) nr(00000001)
 355 // uid(17758822) nt(c0c69e59) ks(01070a05050c0705) nr(00000002)
 356 uint64_t d1[] = {0x17758822, 0xc0c69e59, 0x0000001, 0x080105020705040e};
 357 uint64_t d2[] = {0x17758822, 0xc0c69e59, 0x0000002, 0x01070a05050c0705};
 358
 359 // uid(6e442129) nt(8f699195) ks(090d0b0305020f02) nr(00000001)
 360 // uid(6e442129) nt(8f699195) ks(03030508030b0c0e) nr(00000002)
 361 // uid(6e442129) nt(8f699195) ks(02010f030c0d050d) nr(00000003)
 362 // uid(6e442129) nt(8f699195) ks(00040f0f0305030e) nr(00000004)
 363 uint64_t d1[] = {0x6e442129, 0x8f699195, 0x0000001, 0x090d0b0305020f02};
 364 uint64_t d2[] = {0x6e442129, 0x8f699195, 0x0000004, 0x00040f0f0305030e};
 365
 366 uid(3e172b29) nt(039b7bd2) ks(0c0e0f0505080800) nr(00000001)
 367 uid(3e172b29) nt(039b7bd2) ks(0e06090d03000b0f) nr(00000002)
 368 */
 369         uint64_t key = 0;
 370         uint64_t d1[] = {0x3e172b29, 0x039b7bd2, 0x0000001, 0x0c0e0f0505080800};
 371         uint64_t d2[] = {0x3e172b29, 0x039b7bd2, 0x0000002, 0x0e06090d03000b0f};
 372
 373         nonce2key_ex(0, 0 , d1[0], d1[1], d1[2], d1[3], &key);
 374         nonce2key_ex(0, 0 , d2[0], d2[1], d2[2], d2[3], &key);
 375         return 0;
 376 }
 377
 378 static void permute(uint8_t *data, uint8_t len, uint8_t *output){
 379 #define KEY_SIZE 8
 380
 381         if ( len > KEY_SIZE ) {
 382                 for(uint8_t m = 0; m < len; m += KEY_SIZE){
 383                         permute(data+m, KEY_SIZE, output+m);
 384                 }
 385                 return;
 386         }
 387         if ( len != KEY_SIZE ) {
 388                 printf("wrong key size\n");
 389                 return;
 390         }
 391         uint8_t i,j,p, mask;
 392         for( i=0; i < KEY_SIZE; ++i){
 393                 p = 0;
 394                 mask = 0x80 >> i;
 395                 for( j=0; j < KEY_SIZE; ++j){
 396                         p >>= 1;
 397                         if (data[j] & mask)
 398                                 p |= 0x80;
 399                 }
 400                 output[i] = p;
 401         }
 402 }
 403 static void permute_rev(uint8_t *data, uint8_t len, uint8_t *output){
 404         permute(data, len, output);
 405         permute(output, len, data);
 406         permute(data, len, output);
 407 }
 408 static void simple_crc(uint8_t *data, uint8_t len, uint8_t *output){
 409         uint8_t crc = 0;
 410         for( uint8_t i=0; i < len; ++i){
 411                 // seventh byte contains the crc.
 412                 if ( (i & 0x7) == 0x7 ) {
 413                         output[i] = crc ^ 0xFF;
 414                         crc = 0;
 415                 } else {
 416                         output[i] = data[i];
 417                         crc ^= data[i];
 418                 }
 419         }
 420 }
 421 // DES doesn't use the MSB.
 422 static void shave(uint8_t *data, uint8_t len){
 423         for (uint8_t i=0; i<len; ++i)
 424                 data[i] &= 0xFE;
 425 }
 426 static void generate_rev(uint8_t *data, uint8_t len) {
 427         uint8_t *key = calloc(len,1);
 428         printf("input permuted key | %s \n", sprint_hex(data, len));
 429         permute_rev(data, len, key);
 430         printf("    unpermuted key | %s \n", sprint_hex(key, len));
 431         shave(key, len);
 432         printf("               key | %s \n", sprint_hex(key, len));
 433         free(key);
 434 }
 435 static void generate(uint8_t *data, uint8_t len) {
 436         uint8_t *key = calloc(len,1);
 437         uint8_t *pkey = calloc(len,1);
 438         printf("    input key | %s \n", sprint_hex(data, len));
 439         permute(data, len, pkey);
 440         printf(" permuted key | %s \n", sprint_hex(pkey, len));
 441         simple_crc(pkey, len, key );
 442         printf("   CRC'ed key | %s \n", sprint_hex(key, len));
 443         free(key);
 444         free(pkey);
 445 }
 446 int CmdAnalyseHid(const char *Cmd){
 447
 448         uint8_t data[16] = {0};
 449         bool isReverse = FALSE;
 450         int len = 0;
 451         char cmdp = param_getchar(Cmd, 0);
 452         if (strlen(Cmd) == 0|| cmdp == 'h' || cmdp == 'H') return usage_analyse_hid();
 453
 454         if ( cmdp == 'r' || cmdp == 'R' )
 455                 isReverse = TRUE;
 456
 457         param_gethex_ex(Cmd, 1, data, &len);
 458         if ( len%2 ) return usage_analyse_hid();
 459
 460         len >>= 1;
 461
 462         if ( isReverse )
 463                 generate_rev(data, len);
 464         else
 465                 generate(data, len);
 466         return 0;
 467 }
 468
 469 static command_t CommandTable[] = {
 470         {"help",        CmdHelp,            1, "This help"},
 471         {"lcr",         CmdAnalyseLCR,          1, "Generate final byte for XOR LRC"},
 472         {"crc",         CmdAnalyseCRC,          1, "Stub method for CRC evaluations"},
 473         {"chksum",      CmdAnalyseCHKSUM,       1, "Checksum with adding, masking and one's complement"},
 474         {"dates",       CmdAnalyseDates,        1, "Look for datestamps in a given array of bytes"},
 475         {"tea",         CmdAnalyseTEASelfTest,  1, "Crypto TEA test"},
 476         {"lfsr",        CmdAnalyseLfsr,         1,      "LFSR tests"},
 477         {"a",           CmdAnalyseA,            1,      "num bits test"},
 478         {"hid",         CmdAnalyseHid,          1,      "Permute function from 'heart of darkness' paper"},
 479         {NULL, NULL, 0, NULL}
 480 };
 481
 482 int CmdAnalyse(const char *Cmd) {
 483         clearCommandBuffer();
 484         CmdsParse(CommandTable, Cmd);
 485         return 0;
 486 }
 487
 488 int CmdHelp(const char *Cmd) {
 489         CmdsHelp(CommandTable);
 490         return 0;
 491 }