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