git.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 "scripting.h"
  12
  13 #include <stdlib.h>
  14 #include <lua.h>
  15 #include <lualib.h>
  16 #include <lauxlib.h>
  17 #include "proxmark3.h"
  18 #include "comms.h"
  19 #include "usb_cmd.h"
  20 #include "cmdmain.h"
  21 #include "util.h"
  22 #include "mifare/mifarehost.h"
  23 #include "../common/iso15693tools.h"
  24 #include "iso14443crc.h"
  25 #include "../common/crc16.h"
  26 #include "../common/crc64.h"
  27 #include <mbedtls/sha1.h>
  28 #include <mbedtls/aes.h>
  29
  30 /**
  31  * The following params expected:
  32  *  UsbCommand c
  33  *@brief l_SendCommand
  34  * @param L
  35  * @return
  36  */
  37 static int l_SendCommand(lua_State *L){
  38
  39         /*
  40          *
  41          The SendCommand (native) expects the following structure:
  42
  43          typedef struct {
  44           uint64_t cmd; //8 bytes
  45           uint64_t arg[3]; // 8*3 bytes = 24 bytes
  46           union {
  47                 uint8_t  asBytes[USB_CMD_DATA_SIZE]; // 1 byte * 512 = 512 bytes (OR)
  48                 uint32_t asDwords[USB_CMD_DATA_SIZE/4]; // 4 byte * 128 = 512 bytes
  49           } d;
  50         } PACKED UsbCommand;
  51
  52         ==> A 544 byte buffer will do.
  53         **/
  54         //Pop cmd
  55         size_t size;
  56         const char *data = luaL_checklstring(L, 1, &size);
  57         if(size != sizeof(UsbCommand))
  58         {
  59                 printf("Got data size %d, expected %d" , (int) size,(int) sizeof(UsbCommand));
  60                 lua_pushstring(L,"Wrong data size");
  61                 return 1;
  62         }
  63
  64 //    UsbCommand c = (*data);
  65         SendCommand((UsbCommand* )data);
  66         return 0; // no return values
  67 }
  68 /**
  69  * @brief The following params expected:
  70  * uint32_t cmd
  71  * size_t ms_timeout
  72  * @param L
  73  * @return
  74  */
  75 static int l_WaitForResponseTimeout(lua_State *L){
  76
  77         uint32_t cmd = 0;
  78         size_t ms_timeout = -1;
  79
  80         //Check number of arguments
  81         int n = lua_gettop(L);
  82         if(n == 0)
  83         {
  84                 //signal error by returning Nil, errorstring
  85                 lua_pushnil(L);
  86                 lua_pushstring(L,"You need to supply at least command to wait for");
  87                 return 2; // two return values
  88         }
  89         if(n >= 1)
  90         {
  91                 //pop cmd
  92                 cmd = luaL_checkunsigned(L,1);
  93         }
  94         if(n >= 2)
  95         {
  96                 //Did the user send a timeout ?
  97                 //Check if the current top of stack is an integer
  98                 ms_timeout = luaL_checkunsigned(L,2);
  99                 //printf("Timeout set to %dms\n" , (int) ms_timeout);
 100         }
 101
 102         UsbCommand response;
 103
 104         if(WaitForResponseTimeout(cmd, &response, ms_timeout))
 105         {
 106                 //Push it as a string
 107                 lua_pushlstring(L,(const char *)&response,sizeof(UsbCommand));
 108
 109                 return 1;// return 1 to signal one return value
 110         }else{
 111                 //Push a Nil instead
 112                 lua_pushnil(L);
 113                 return 1;// one return value
 114         }
 115 }
 116
 117 static int returnToLuaWithError(lua_State *L, const char* fmt, ...)
 118 {
 119         char buffer[200];
 120         va_list args;
 121         va_start(args,fmt);
 122         vsnprintf(buffer, sizeof(buffer), fmt,args);
 123         va_end(args);
 124
 125         lua_pushnil(L);
 126         lua_pushstring(L,buffer);
 127         return 2;
 128 }
 129
 130 static int l_mfDarkside(lua_State *L){
 131
 132         uint64_t key;
 133
 134         int retval = mfDarkside(&key);
 135
 136         //Push the retval on the stack
 137         lua_pushinteger(L, retval);
 138
 139         //Push the key onto the stack
 140         uint8_t dest_key[8];
 141         num_to_bytes(key, sizeof(dest_key), dest_key);
 142
 143         //printf("Pushing to lua stack: %012" PRIx64 "\n",key);
 144         lua_pushlstring(L,(const char *)dest_key, sizeof(dest_key));
 145
 146         return 2; //Two return values
 147 }
 148
 149 //static int l_PrintAndLog(lua_State *L){ return CmdHF14AMfDump(luaL_checkstring(L, 1));}
 150
 151 static int l_clearCommandBuffer(lua_State *L){
 152         clearCommandBuffer();
 153         return 0;
 154 }
 155 /**
 156  * @brief l_foobar is a dummy function to test lua-integration with
 157  * @param L
 158  * @return
 159  */
 160 static int l_foobar(lua_State *L)
 161 {
 162         //Check number of arguments
 163         int n = lua_gettop(L);
 164         printf("foobar called with %d arguments" , n);
 165         lua_settop(L, 0);
 166         printf("Arguments discarded, stack now contains %d elements", lua_gettop(L));
 167
 168         // todo: this is not used, where was it intended for?
 169         // UsbCommand response =  {CMD_MIFARE_READBL, {1337, 1338, 1339}};
 170
 171         printf("Now returning a uint64_t as a string");
 172         uint64_t x = 0xDEADBEEF;
 173         uint8_t destination[8];
 174         num_to_bytes(x,sizeof(x),destination);
 175         lua_pushlstring(L,(const char *)&x,sizeof(x));
 176         lua_pushlstring(L,(const char *)destination,sizeof(destination));
 177
 178         return 2;
 179 }
 180
 181
 182 /**
 183  * @brief Utility to check if a key has been pressed by the user. This method does not block.
 184  * @param L
 185  * @return boolean, true if kbhit, false otherwise.
 186  */
 187 static int l_ukbhit(lua_State *L)
 188 {
 189         lua_pushboolean(L,ukbhit() ? true : false);
 190         return 1;
 191 }
 192 /**
 193  * @brief Calls the command line parser to deal with the command. This enables
 194  * lua-scripts to do stuff like "core.console('hf mf mifare')"
 195  * @param L
 196  * @return
 197  */
 198 static int l_CmdConsole(lua_State *L)
 199 {
 200         CommandReceived((char *)luaL_checkstring(L, 1));
 201         return 0;
 202 }
 203
 204 static int l_iso15693_crc(lua_State *L)
 205 {
 206         //    uint16_t Iso15693Crc(uint8_t *v, int n);
 207         size_t size;
 208         const char *v = luaL_checklstring(L, 1, &size);
 209         uint16_t retval = Iso15693Crc((uint8_t *) v, size);
 210         lua_pushinteger(L, (int) retval);
 211         return 1;
 212 }
 213
 214 static int l_iso14443b_crc(lua_State *L)
 215 {
 216         /* void ComputeCrc14443(int CrcType,
 217                      const unsigned char *Data, int Length,
 218                      unsigned char *TransmitFirst,
 219                      unsigned char *TransmitSecond)
 220         */
 221         unsigned char buf[USB_CMD_DATA_SIZE];
 222         size_t len = 0;
 223         const char *data = luaL_checklstring(L, 1, &len);
 224         if (len > USB_CMD_DATA_SIZE-2)
 225                 len =  USB_CMD_DATA_SIZE-2;
 226
 227         for (int i = 0; i < len; i += 2) {
 228                 sscanf(&data[i], "%02x", (unsigned int *)&buf[i / 2]);
 229         }
 230         ComputeCrc14443(CRC_14443_B, buf, len, &buf[len], &buf[len+1]);
 231
 232         lua_pushlstring(L, (const char *)&buf, len+2);
 233         return 1;
 234 }
 235 /*
 236  Simple AES 128 cbc hook up to OpenSSL.
 237  params:  key, input
 238 */
 239 static int l_aes128decrypt_cbc(lua_State *L)
 240 {
 241         //Check number of arguments
 242         int i;
 243         size_t size;
 244         const char *p_key = luaL_checklstring(L, 1, &size);
 245         if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 246
 247         const char *p_encTxt = luaL_checklstring(L, 2, &size);
 248
 249         unsigned char indata[16] = {0x00};
 250         unsigned char outdata[16] = {0x00};
 251         unsigned char aes_key[16] = {0x00};
 252         unsigned char iv[16] = {0x00};
 253
 254         // convert key to bytearray and convert input to bytearray
 255         for (i = 0; i < 32; i += 2) {
 256                 sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
 257                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 258         }
 259
 260         mbedtls_aes_context ctx;
 261         mbedtls_aes_init(&ctx);
 262         mbedtls_aes_setkey_dec(&ctx, aes_key, 128);
 263         mbedtls_aes_crypt_cbc(&ctx, MBEDTLS_AES_DECRYPT, sizeof(indata), iv, indata,outdata );
 264         //Push decrypted array as a string
 265         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 266         return 1;// return 1 to signal one return value
 267 }
 268 static int l_aes128decrypt_ecb(lua_State *L)
 269 {
 270         //Check number of arguments
 271         int i;
 272         size_t size;
 273         const char *p_key = luaL_checklstring(L, 1, &size);
 274         if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 275
 276         const char *p_encTxt = luaL_checklstring(L, 2, &size);
 277
 278         unsigned char indata[16] = {0x00};
 279         unsigned char outdata[16] = {0x00};
 280         unsigned char aes_key[16] = {0x00};
 281
 282         // convert key to bytearray and convert input to bytearray
 283         for (i = 0; i < 32; i += 2) {
 284                 sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
 285                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 286         }
 287         mbedtls_aes_context ctx;
 288         mbedtls_aes_init(&ctx);
 289         mbedtls_aes_setkey_dec(&ctx, aes_key, 128);
 290         mbedtls_aes_crypt_ecb(&ctx, MBEDTLS_AES_DECRYPT, indata, outdata );
 291
 292         //Push decrypted array as a string
 293         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 294         return 1;// return 1 to signal one return value
 295 }
 296
 297 static int l_aes128encrypt_cbc(lua_State *L)
 298 {
 299         //Check number of arguments
 300         int i;
 301         size_t size;
 302         const char *p_key = luaL_checklstring(L, 1, &size);
 303         if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 304
 305         const char *p_txt = luaL_checklstring(L, 2, &size);
 306
 307         unsigned char indata[16] = {0x00};
 308         unsigned char outdata[16] = {0x00};
 309         unsigned char aes_key[16] = {0x00};
 310         unsigned char iv[16] = {0x00};
 311
 312         for (i = 0; i < 32; i += 2) {
 313                 sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
 314                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 315         }
 316
 317         mbedtls_aes_context ctx;
 318         mbedtls_aes_init(&ctx);
 319         mbedtls_aes_setkey_enc(&ctx, aes_key, 128);
 320         mbedtls_aes_crypt_cbc(&ctx, MBEDTLS_AES_ENCRYPT, sizeof(indata), iv, indata, outdata );
 321         //Push encrypted array as a string
 322         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 323         return 1;// return 1 to signal one return value
 324 }
 325
 326 static int l_aes128encrypt_ecb(lua_State *L)
 327 {
 328         //Check number of arguments
 329         int i;
 330         size_t size;
 331         const char *p_key = luaL_checklstring(L, 1, &size);
 332         if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 333
 334         const char *p_txt = luaL_checklstring(L, 2, &size);
 335
 336         unsigned char indata[16] = {0x00};
 337         unsigned char outdata[16] = {0x00};
 338         unsigned char aes_key[16] = {0x00};
 339
 340         for (i = 0; i < 32; i += 2) {
 341                 sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
 342                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 343         }
 344         mbedtls_aes_context ctx;
 345         mbedtls_aes_init(&ctx);
 346         mbedtls_aes_setkey_enc(&ctx, aes_key, 128);
 347         mbedtls_aes_crypt_ecb(&ctx, MBEDTLS_AES_ENCRYPT, indata, outdata );
 348         //Push encrypted array as a string
 349         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 350         return 1;// return 1 to signal one return value
 351 }
 352
 353 static int l_crc16(lua_State *L)
 354 {
 355         size_t size;
 356         const char *p_str = luaL_checklstring(L, 1, &size);
 357
 358         uint16_t retval = crc16_ccitt( (uint8_t*) p_str, size);
 359         lua_pushinteger(L, (int) retval);
 360         return 1;
 361 }
 362
 363 static int l_crc64(lua_State *L)
 364 {
 365         size_t size;
 366         uint64_t crc = 0;
 367         unsigned char outdata[8] = {0x00};
 368
 369         const char *p_str = luaL_checklstring(L, 1, &size);
 370
 371         crc64( (uint8_t*) p_str, size, &crc);
 372
 373         outdata[0] = (uint8_t)(crc >> 56) & 0xff;
 374         outdata[1] = (uint8_t)(crc >> 48) & 0xff;
 375         outdata[2] = (uint8_t)(crc >> 40) & 0xff;
 376         outdata[3] = (uint8_t)(crc >> 32) & 0xff;
 377         outdata[4] = (uint8_t)(crc >> 24) & 0xff;
 378         outdata[5] = (uint8_t)(crc >> 16) & 0xff;
 379         outdata[6] = (uint8_t)(crc >> 8) & 0xff;
 380         outdata[7] = crc & 0xff;
 381         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 382         return 1;
 383 }
 384
 385 static int l_sha1(lua_State *L)
 386 {
 387         size_t size;
 388         const char *p_str = luaL_checklstring(L, 1, &size);
 389         unsigned char outdata[20] = {0x00};
 390         mbedtls_sha1( (uint8_t*) p_str, size, outdata);
 391         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 392         return 1;
 393 }
 394
 395 /**
 396  * @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
 397  * able to do "require('foobar')" if foobar.lua is within lualibs folder.
 398  * Taken from http://stackoverflow.com/questions/4125971/setting-the-global-lua-path-variable-from-c-c
 399  * @param L
 400  * @param path
 401  * @return
 402  */
 403 int setLuaPath( lua_State* L, const char* path )
 404 {
 405         lua_getglobal( L, "package" );
 406         lua_getfield( L, -1, "path" ); // get field "path" from table at top of stack (-1)
 407         const char* cur_path = lua_tostring( L, -1 ); // grab path string from top of stack
 408         int requiredLength = strlen(cur_path)+ strlen(path)+10; //A few bytes too many, whatever we can afford it
 409         char * buf = malloc(requiredLength);
 410         snprintf(buf, requiredLength, "%s;%s", cur_path, path);
 411         lua_pop( L, 1 ); // get rid of the string on the stack we just pushed on line 5
 412         lua_pushstring( L, buf ); // push the new one
 413         lua_setfield( L, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
 414         lua_pop( L, 1 ); // get rid of package table from top of stack
 415         free(buf);
 416         return 0; // all done!
 417 }
 418
 419
 420 int set_pm3_libraries(lua_State *L)
 421 {
 422
 423         static const luaL_Reg libs[] = {
 424                 {"SendCommand",                 l_SendCommand},
 425                 {"WaitForResponseTimeout",      l_WaitForResponseTimeout},
 426                 {"mfDarkside",                  l_mfDarkside},
 427                 //{"PrintAndLog",                 l_PrintAndLog},
 428                 {"foobar",                      l_foobar},
 429                 {"ukbhit",                      l_ukbhit},
 430                 {"clearCommandBuffer",          l_clearCommandBuffer},
 431                 {"console",                     l_CmdConsole},
 432                 {"iso15693_crc",                l_iso15693_crc},
 433                 {"iso14443b_crc",               l_iso14443b_crc},
 434                 {"aes128_decrypt",              l_aes128decrypt_cbc},
 435                 {"aes128_decrypt_ecb",          l_aes128decrypt_ecb},
 436                 {"aes128_encrypt",              l_aes128encrypt_cbc},
 437                 {"aes128_encrypt_ecb",          l_aes128encrypt_ecb},
 438                 {"crc16",                       l_crc16},
 439                 {"crc64",                       l_crc64},
 440                 {"sha1",                        l_sha1},
 441                 {NULL, NULL}
 442         };
 443
 444         lua_pushglobaltable(L);
 445         // Core library is in this table. Contains '
 446         //this is 'pm3' table
 447         lua_newtable(L);
 448
 449         //Put the function into the hash table.
 450         for (int i = 0; libs[i].name; i++) {
 451                 lua_pushcfunction(L, libs[i].func);
 452                 lua_setfield(L, -2, libs[i].name);//set the name, pop stack
 453         }
 454         //Name of 'core'
 455         lua_setfield(L, -2, "core");
 456
 457         //-- remove the global environment table from the stack
 458         lua_pop(L, 1);
 459
 460         //-- Last but not least, add to the LUA_PATH (package.path in lua)
 461         // so we can load libraries from the ./lualib/ - directory
 462         char libraries_path[strlen(get_my_executable_directory()) + strlen(LUA_LIBRARIES_DIRECTORY) + strlen(LUA_LIBRARIES_WILDCARD) + 1];
 463         strcpy(libraries_path, get_my_executable_directory());
 464         strcat(libraries_path, LUA_LIBRARIES_DIRECTORY);
 465         strcat(libraries_path, LUA_LIBRARIES_WILDCARD);
 466         setLuaPath(L, libraries_path);
 467
 468         return 1;
 469 }