cvs.zerfleddert.de Git - proxmark3-svn/blob - client/scripting.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2013 m h swende <martin at swende.se>
   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 // Some lua scripting glue to proxmark core.
   9 //-----------------------------------------------------------------------------
  10
  11 #include <lua.h>
  12 #include <lualib.h>
  13 #include <lauxlib.h>
  14 #include "proxmark3.h"
  15 #include "usb_cmd.h"
  16 #include "cmdmain.h"
  17 #include "scripting.h"
  18 #include "util.h"
  19 #include "nonce2key/nonce2key.h"
  20 #include "../common/iso15693tools.h"
  21 #include "iso14443crc.h"
  22 #include "../common/crc16.h"
  23 #include "../common/crc64.h"
  24 #include "../common/sha1.h"
  25 #include "aes.h"
  26 #include "cmdcrc.h"
  27 /**
  28  * The following params expected:
  29  *  UsbCommand c
  30  *@brief l_SendCommand
  31  * @param L
  32  * @return
  33  */
  34 static int l_SendCommand(lua_State *L){
  35
  36     /*
  37      *
  38      The SendCommand (native) expects the following structure:
  39
  40      typedef struct {
  41       uint64_t cmd; //8 bytes
  42       uint64_t arg[3]; // 8*3 bytes = 24 bytes
  43       union {
  44         uint8_t  asBytes[USB_CMD_DATA_SIZE]; // 1 byte * 512 = 512 bytes (OR)
  45         uint32_t asDwords[USB_CMD_DATA_SIZE/4]; // 4 byte * 128 = 512 bytes
  46       } d;
  47     } PACKED UsbCommand;
  48
  49     ==> A 544 byte buffer will do.
  50     **/
  51     //Pop cmd
  52     size_t size;
  53     const char *data = luaL_checklstring(L, 1, &size);
  54     if(size != sizeof(UsbCommand))
  55     {
  56         printf("Got data size %d, expected %d" , size, sizeof(UsbCommand));
  57         lua_pushstring(L,"Wrong data size");
  58         return 1;
  59     }
  60
  61     SendCommand((UsbCommand* )data);
  62     return 0; // no return values
  63 }
  64 /**
  65  * @brief The following params expected:
  66  * uint32_t cmd
  67  * size_t ms_timeout
  68  * @param L
  69  * @return
  70  */
  71 static int l_WaitForResponseTimeout(lua_State *L){
  72
  73     uint32_t cmd = 0;
  74     size_t ms_timeout = -1;
  75
  76     //Check number of arguments
  77     int n = lua_gettop(L);
  78     if(n == 0)
  79     {
  80         //signal error by returning Nil, errorstring
  81         lua_pushnil(L);
  82         lua_pushstring(L,"You need to supply at least command to wait for");
  83         return 2; // two return values
  84     }
  85     if(n >= 1)
  86     {
  87         //pop cmd
  88         cmd = luaL_checkunsigned(L,1);
  89     }
  90     if(n >= 2)
  91     {
  92         //Did the user send a timeout ?
  93         //Check if the current top of stack is an integer
  94         ms_timeout = luaL_checkunsigned(L,2);
  95         //printf("Timeout set to %dms\n" , (int) ms_timeout);
  96     }
  97
  98     UsbCommand response;
  99
 100     if(WaitForResponseTimeout(cmd, &response, ms_timeout))
 101     {
 102         //Push it as a string
 103          lua_pushlstring(L,(const char *)&response, sizeof(UsbCommand));
 104
 105         return 1;// return 1 to signal one return value
 106     }else{
 107         //Push a Nil instead
 108         lua_pushnil(L);
 109         return 1;// one return value
 110     }
 111 }
 112
 113 static int returnToLuaWithError(lua_State *L, const char* fmt, ...)
 114 {
 115     char buffer[200];
 116     va_list args;
 117     va_start(args,fmt);
 118     vsnprintf(buffer, sizeof(buffer), fmt,args);
 119     va_end(args);
 120
 121     lua_pushnil(L);
 122     lua_pushstring(L,buffer);
 123     return 2;
 124 }
 125
 126 static int l_nonce2key(lua_State *L){
 127
 128     size_t size;
 129     const char *p_uid = luaL_checklstring(L, 1, &size);
 130     if(size != 4)  return returnToLuaWithError(L,"Wrong size of uid, got %d bytes, expected 4", (int) size);
 131
 132     const char *p_nt = luaL_checklstring(L, 2, &size);
 133     if(size != 4)  return returnToLuaWithError(L,"Wrong size of nt, got %d bytes, expected 4", (int) size);
 134
 135     const char *p_nr = luaL_checklstring(L, 3, &size);
 136     if(size != 4)  return returnToLuaWithError(L,"Wrong size of nr, got %d bytes, expected 4", (int) size);
 137
 138     const char *p_par_info = luaL_checklstring(L, 4, &size);
 139     if(size != 8)  return returnToLuaWithError(L,"Wrong size of par_info, got %d bytes, expected 8", (int) size);
 140
 141     const char *p_pks_info = luaL_checklstring(L, 5, &size);
 142     if(size != 8)  return returnToLuaWithError(L,"Wrong size of ks_info, got %d bytes, expected 8", (int) size);
 143
 144
 145     uint32_t uid = bytes_to_num(( uint8_t *)p_uid,4);
 146     uint32_t nt = bytes_to_num(( uint8_t *)p_nt,4);
 147
 148     uint32_t nr = bytes_to_num(( uint8_t*)p_nr,4);
 149     uint64_t par_info = bytes_to_num(( uint8_t *)p_par_info,8);
 150     uint64_t ks_info = bytes_to_num(( uint8_t *)p_pks_info,8);
 151
 152     uint64_t key = 0;
 153
 154     int retval = nonce2key(uid,nt, nr, par_info,ks_info, &key);
 155
 156     //Push the retval on the stack
 157     lua_pushinteger(L,retval);
 158
 159     //Push the key onto the stack
 160     uint8_t dest_key[8];
 161     num_to_bytes(key,sizeof(dest_key),dest_key);
 162
 163     //printf("Pushing to lua stack: %012"llx"\n",key);
 164     lua_pushlstring(L,(const char *) dest_key,sizeof(dest_key));
 165
 166     return 2; //Two return values
 167 }
 168 //static int l_PrintAndLog(lua_State *L){ return CmdHF14AMfDump(luaL_checkstring(L, 1));}
 169 static int l_clearCommandBuffer(lua_State *L){
 170     clearCommandBuffer();
 171     return 0;
 172 }
 173 /**
 174  * @brief l_foobar is a dummy function to test lua-integration with
 175  * @param L
 176  * @return
 177  */
 178 static int l_foobar(lua_State *L)
 179 {
 180     //Check number of arguments
 181     int n = lua_gettop(L);
 182     printf("foobar called with %d arguments" , n);
 183     lua_settop(L, 0);
 184     printf("Arguments discarded, stack now contains %d elements", lua_gettop(L));
 185
 186     // todo: this is not used, where was it intended for?
 187     // UsbCommand response =  {CMD_MIFARE_READBL, {1337, 1338, 1339}};
 188
 189     printf("Now returning a uint64_t as a string");
 190     uint64_t x = 0xDEADBEEF;
 191     uint8_t destination[8];
 192     num_to_bytes(x,sizeof(x),destination);
 193     lua_pushlstring(L,(const char *)&x,sizeof(x));
 194     lua_pushlstring(L,(const char *)destination,sizeof(destination));
 195
 196     return 2;
 197 }
 198
 199
 200 /**
 201  * @brief Utility to check if a key has been pressed by the user. This method does not block.
 202  * @param L
 203  * @return boolean, true if kbhit, false otherwise.
 204  */
 205 static int l_ukbhit(lua_State *L)
 206 {
 207     lua_pushboolean(L,ukbhit() ? true : false);
 208     return 1;
 209 }
 210 /**
 211  * @brief Calls the command line parser to deal with the command. This enables
 212  * lua-scripts to do stuff like "core.console('hf mf mifare')"
 213  * @param L
 214  * @return
 215  */
 216 static int l_CmdConsole(lua_State *L)
 217 {
 218     CommandReceived((char *)luaL_checkstring(L, 1));
 219     return 0;
 220 }
 221
 222 static int l_iso15693_crc(lua_State *L)
 223 {
 224     //    uint16_t Iso15693Crc(uint8_t *v, int n);
 225     size_t size;
 226     const char *v = luaL_checklstring(L, 1, &size);
 227     uint16_t retval = Iso15693Crc((uint8_t *) v, size);
 228     lua_pushinteger(L, (int) retval);
 229     return 1;
 230 }
 231
 232 static int l_iso14443b_crc(lua_State *L)
 233 {
 234         /* void ComputeCrc14443(int CrcType,
 235                      const unsigned char *Data, int Length,
 236                      unsigned char *TransmitFirst,
 237                      unsigned char *TransmitSecond)
 238         */
 239         unsigned char buf[USB_CMD_DATA_SIZE];
 240     size_t len = 0;
 241     const char *data = luaL_checklstring(L, 1, &len);
 242         if (USB_CMD_DATA_SIZE < len)
 243                 len =  USB_CMD_DATA_SIZE-2;
 244
 245         for (int i = 0; i < len; i += 2) {
 246                 sscanf(&data[i], "%02x", (unsigned int *)&buf[i / 2]);
 247         }
 248         ComputeCrc14443(CRC_14443_B, buf, len, &buf[len], &buf[len+1]);
 249
 250     lua_pushlstring(L, (const char *)&buf, len+2);
 251     return 1;
 252 }
 253
 254 /*
 255  Simple AES 128 cbc hook up to OpenSSL.
 256  params:  key, input
 257 */
 258 static int l_aes128decrypt_cbc(lua_State *L)
 259 {
 260         //Check number of arguments
 261         int i;
 262     size_t size;
 263     const char *p_key = luaL_checklstring(L, 1, &size);
 264     if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 265
 266     const char *p_encTxt = luaL_checklstring(L, 2, &size);
 267
 268         unsigned char indata[16] = {0x00};
 269         unsigned char outdata[16] = {0x00};
 270     unsigned char aes_key[16] = {0x00};
 271         unsigned char iv[16] = {0x00};
 272
 273         // convert key to bytearray and convert input to bytearray
 274         for (i = 0; i < 32; i += 2) {
 275                 sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
 276                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 277         }
 278
 279     aes_context ctx;
 280     aes_init(&ctx);
 281         aes_setkey_dec(&ctx, aes_key, 128);
 282         aes_crypt_cbc(&ctx, AES_DECRYPT, sizeof(indata), iv, indata, outdata );
 283     //Push decrypted array as a string
 284         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 285         return 1;// return 1 to signal one return value
 286 }
 287 static int l_aes128decrypt_ecb(lua_State *L)
 288 {
 289         //Check number of arguments
 290         int i;
 291     size_t size;
 292     const char *p_key = luaL_checklstring(L, 1, &size);
 293     if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 294
 295     const char *p_encTxt = luaL_checklstring(L, 2, &size);
 296
 297         unsigned char indata[16] = {0x00};
 298         unsigned char outdata[16] = {0x00};
 299     unsigned char aes_key[16] = {0x00};
 300
 301         // convert key to bytearray and convert input to bytearray
 302         for (i = 0; i < 32; i += 2) {
 303                 sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
 304                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 305         }
 306     aes_context ctx;
 307     aes_init(&ctx);
 308         aes_setkey_dec(&ctx, aes_key, 128);
 309         aes_crypt_ecb(&ctx, AES_DECRYPT, indata, outdata );
 310
 311     //Push decrypted array as a string
 312         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 313         return 1;// return 1 to signal one return value
 314 }
 315
 316 static int l_aes128encrypt_cbc(lua_State *L)
 317 {
 318         //Check number of arguments
 319         int i;
 320     size_t size;
 321     const char *p_key = luaL_checklstring(L, 1, &size);
 322     if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 323
 324     const char *p_txt = luaL_checklstring(L, 2, &size);
 325
 326         unsigned char indata[16] = {0x00};
 327         unsigned char outdata[16] = {0x00};
 328     unsigned char aes_key[16] = {0x00};
 329         unsigned char iv[16] = {0x00};
 330
 331         for (i = 0; i < 32; i += 2) {
 332                 sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
 333                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 334         }
 335
 336     aes_context ctx;
 337     aes_init(&ctx);
 338         aes_setkey_enc(&ctx, aes_key, 128);
 339         aes_crypt_cbc(&ctx, AES_ENCRYPT, sizeof(indata), iv, indata, outdata );
 340         //Push encrypted array as a string
 341         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 342         return 1;// return 1 to signal one return value
 343 }
 344
 345 static int l_aes128encrypt_ecb(lua_State *L)
 346 {
 347         //Check number of arguments
 348         int i;
 349     size_t size;
 350     const char *p_key = luaL_checklstring(L, 1, &size);
 351     if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 352
 353     const char *p_txt = luaL_checklstring(L, 2, &size);
 354
 355         unsigned char indata[16] = {0x00};
 356         unsigned char outdata[16] = {0x00};
 357     unsigned char aes_key[16] = {0x00};
 358
 359         for (i = 0; i < 32; i += 2) {
 360                 sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
 361                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 362         }
 363     aes_context ctx;
 364     aes_init(&ctx);
 365         aes_setkey_enc(&ctx, aes_key, 128);
 366         aes_crypt_ecb(&ctx, AES_ENCRYPT, indata, outdata );
 367         //Push encrypted array as a string
 368         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 369         return 1;// return 1 to signal one return value
 370 }
 371
 372 static int l_crc16(lua_State *L)
 373 {
 374         size_t size;
 375         const char *p_str = luaL_checklstring(L, 1, &size);
 376
 377         uint16_t retval = crc16_ccitt( (uint8_t*) p_str, size);
 378     lua_pushinteger(L, (int) retval);
 379     return 1;
 380 }
 381
 382 static int l_crc64(lua_State *L)
 383 {
 384         size_t size;
 385         uint64_t crc = 0;
 386         unsigned char outdata[8] = {0x00};
 387
 388         const char *p_str = luaL_checklstring(L, 1, &size);
 389
 390         crc64( (uint8_t*) p_str, size, &crc);
 391
 392         outdata[0] = (uint8_t)(crc >> 56) & 0xff;
 393         outdata[1] = (uint8_t)(crc >> 48) & 0xff;
 394         outdata[2] = (uint8_t)(crc >> 40) & 0xff;
 395         outdata[3] = (uint8_t)(crc >> 32) & 0xff;
 396         outdata[4] = (uint8_t)(crc >> 24) & 0xff;
 397         outdata[5] = (uint8_t)(crc >> 16) & 0xff;
 398         outdata[6] = (uint8_t)(crc >> 8) & 0xff;
 399         outdata[7] = crc & 0xff;
 400         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 401         return 1;
 402 }
 403
 404 static int l_sha1(lua_State *L)
 405 {
 406         size_t size;
 407         const char *p_str = luaL_checklstring(L, 1, &size);
 408         unsigned char outdata[20] = {0x00};
 409     sha1( (uint8_t*) p_str, size, outdata);
 410     lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 411     return 1;
 412 }
 413
 414 static int l_reveng_models(lua_State *L){
 415
 416         char *models[80];
 417         int count = 0;
 418         int in_width = luaL_checkinteger(L, 1);
 419
 420         if( in_width > 89 ) return returnToLuaWithError(L,"Width cannot exceed 89, got %d", in_width);
 421
 422         uint8_t width[80];
 423         width[0] = (uint8_t)in_width;
 424         int ans = GetModels(models, &count, width);
 425         if (!ans) return 0;
 426
 427         lua_newtable(L);
 428
 429         for (int i = 0; i < count; i++){
 430                 lua_pushstring(L,  (const char*)models[i]);
 431                 lua_rawseti(L,-2,i+1);
 432                 free(models[i]);
 433         }
 434
 435         return 1;
 436 }
 437
 438 //Called with 4 parameters.
 439 // inModel   ,string containing the crc model name: 'CRC-8'
 440 // inHexStr  ,string containing the hex representation of the data that will be used for CRC calculations.
 441 // reverse   ,int 0/1  (bool) if 1, calculate the reverse CRC
 442 // endian    ,char,  'B','b','L','l','t','r' describing if Big-Endian or Little-Endian should be used in different combinations.
 443 //
 444 // outputs:  string with hex representation of the CRC result
 445 static int l_reveng_RunModel(lua_State *L){
 446         //-c || -v
 447         //inModel = valid model name string - CRC-8
 448         //inHexStr = input hex string to calculate crc on
 449         //reverse = reverse calc option if true
 450         //endian = {0 = calc default endian input and output, b = big endian input and output, B = big endian output, r = right justified
 451         //          l = little endian input and output, L = little endian output only, t = left justified}
 452         //result = calculated crc hex string
 453         char result[50];
 454
 455         const char *inModel = luaL_checkstring(L, 1);
 456         const char *inHexStr = luaL_checkstring(L, 2);
 457     bool reverse =  lua_toboolean(L, 3);
 458         const char endian = luaL_checkstring(L, 4)[0];
 459
 460         //PrintAndLog("mod: %s, hex: %s, rev %d", inModel, inHexStr, reverse);
 461         //    int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, char *result)
 462         int ans = RunModel( (char *)inModel, (char *)inHexStr, reverse, endian, result);
 463         if (!ans)
 464                 return returnToLuaWithError(L,"Reveng failed");
 465
 466         lua_pushstring(L, (const char*)result);
 467         return 1;
 468 }
 469
 470 /**
 471  * @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
 472  * able to do "require('foobar')" if foobar.lua is within lualibs folder.
 473  * Taken from http://stackoverflow.com/questions/4125971/setting-the-global-lua-path-variable-from-c-c
 474  * @param L
 475  * @param path
 476  * @return
 477  */
 478 int setLuaPath( lua_State* L, const char* path )
 479 {
 480     lua_getglobal( L, "package" );
 481     lua_getfield( L, -1, "path" ); // get field "path" from table at top of stack (-1)
 482     const char* cur_path = lua_tostring( L, -1 ); // grab path string from top of stack
 483     int requiredLength = strlen(cur_path)+ strlen(path)+10; //A few bytes too many, whatever we can afford it
 484     char * buf = malloc(requiredLength);
 485     snprintf(buf, requiredLength, "%s;%s", cur_path, path);
 486     lua_pop( L, 1 ); // get rid of the string on the stack we just pushed on line 5
 487     lua_pushstring( L, buf ); // push the new one
 488     lua_setfield( L, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
 489     lua_pop( L, 1 ); // get rid of package table from top of stack
 490         free(buf);
 491         return 0; // all done!
 492 }
 493
 494
 495 int set_pm3_libraries(lua_State *L)
 496 {
 497
 498     static const luaL_Reg libs[] = {
 499         {"SendCommand",                 l_SendCommand},
 500         {"WaitForResponseTimeout",      l_WaitForResponseTimeout},
 501         {"nonce2key",                   l_nonce2key},
 502         //{"PrintAndLog",                 l_PrintAndLog},
 503         {"foobar",                      l_foobar},
 504         {"ukbhit",                      l_ukbhit},
 505         {"clearCommandBuffer",          l_clearCommandBuffer},
 506                 {"console",                     l_CmdConsole},
 507                 {"iso15693_crc",                l_iso15693_crc},
 508                 {"iso14443b_crc",                               l_iso14443b_crc},
 509                 {"aes128_decrypt",              l_aes128decrypt_cbc},
 510                 {"aes128_decrypt_ecb",          l_aes128decrypt_ecb},
 511                 {"aes128_encrypt",              l_aes128encrypt_cbc},
 512                 {"aes128_encrypt_ecb",          l_aes128encrypt_ecb},
 513                 {"crc16",                       l_crc16},
 514                 {"crc64",                       l_crc64},
 515                 {"sha1",                                                l_sha1},
 516                 {"reveng_models",                               l_reveng_models},
 517                 {"reveng_runmodel",                             l_reveng_RunModel},
 518         {NULL, NULL}
 519     };
 520
 521     lua_pushglobaltable(L);
 522     // Core library is in this table. Contains '
 523     //this is 'pm3' table
 524     lua_newtable(L);
 525
 526     //Put the function into the hash table.
 527     for (int i = 0; libs[i].name; i++) {
 528         lua_pushcfunction(L, libs[i].func);
 529         lua_setfield(L, -2, libs[i].name);//set the name, pop stack
 530     }
 531     //Name of 'core'
 532     lua_setfield(L, -2, "core");
 533
 534     //-- remove the global environment table from the stack
 535     lua_pop(L, 1);
 536
 537     //-- Last but not least, add to the LUA_PATH (package.path in lua)
 538     // so we can load libraries from the ./lualib/ - directory
 539     setLuaPath(L,"./lualibs/?.lua");
 540
 541     return 1;
 542 }