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 <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 "ui.h"
  20 #include "nonce2key/nonce2key.h"
  21 #include "../common/iso15693tools.h"
  22 #include "../common/crc16.h"
  23 #include "../common/crc64.h"
  24 #include "../common/sha1.h"
  25 #include "aes.h"
  26 /**
  27  * The following params expected:
  28  *  UsbCommand c
  29  *@brief l_SendCommand
  30  * @param L
  31  * @return
  32  */
  33 static int l_SendCommand(lua_State *L){
  34
  35     /*
  36      *
  37      The SendCommand (native) expects the following structure:
  38
  39      typedef struct {
  40       uint64_t cmd; //8 bytes
  41       uint64_t arg[3]; // 8*3 bytes = 24 bytes
  42       union {
  43         uint8_t  asBytes[USB_CMD_DATA_SIZE]; // 1 byte * 512 = 512 bytes (OR)
  44         uint32_t asDwords[USB_CMD_DATA_SIZE/4]; // 4 byte * 128 = 512 bytes
  45       } d;
  46     } PACKED UsbCommand;
  47
  48     ==> A 544 byte buffer will do.
  49     **/
  50     //Pop cmd
  51     size_t size;
  52     const char *data = luaL_checklstring(L, 1, &size);
  53     if(size != sizeof(UsbCommand))
  54     {
  55         printf("Got data size %d, expected %d" , (int) size,(int) sizeof(UsbCommand));
  56         lua_pushstring(L,"Wrong data size");
  57         return 1;
  58     }
  59
  60 //    UsbCommand c = (*data);
  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 /*
 233  Simple AES 128 cbc hook up to OpenSSL.
 234  params:  key, input
 235 */
 236 static int l_aes128decrypt_cbc(lua_State *L)
 237 {
 238         //Check number of arguments
 239         int i;
 240     size_t size;
 241     const char *p_key = luaL_checklstring(L, 1, &size);
 242     if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 243
 244     const char *p_encTxt = luaL_checklstring(L, 2, &size);
 245
 246         unsigned char indata[16] = {0x00};
 247         unsigned char outdata[16] = {0x00};
 248     unsigned char aes_key[16] = {0x00};
 249         unsigned char iv[16] = {0x00};
 250
 251         // convert key to bytearray and convert input to bytearray
 252         for (i = 0; i < 32; i += 2) {
 253                 sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
 254                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 255         }
 256
 257     aes_context ctx;
 258     aes_init(&ctx);
 259         aes_setkey_dec(&ctx, aes_key, 128);
 260         aes_crypt_cbc(&ctx, AES_DECRYPT, sizeof(indata), iv, indata, outdata );
 261     //Push decrypted array as a string
 262         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 263         return 1;// return 1 to signal one return value
 264 }
 265 static int l_aes128decrypt_ecb(lua_State *L)
 266 {
 267         //Check number of arguments
 268         int i;
 269     size_t size;
 270     const char *p_key = luaL_checklstring(L, 1, &size);
 271     if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 272
 273     const char *p_encTxt = luaL_checklstring(L, 2, &size);
 274
 275         unsigned char indata[16] = {0x00};
 276         unsigned char outdata[16] = {0x00};
 277     unsigned char aes_key[16] = {0x00};
 278
 279         // convert key to bytearray and convert input to bytearray
 280         for (i = 0; i < 32; i += 2) {
 281                 sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
 282                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 283         }
 284     aes_context ctx;
 285     aes_init(&ctx);
 286         aes_setkey_dec(&ctx, aes_key, 128);
 287         aes_crypt_ecb(&ctx, AES_DECRYPT, indata, outdata );
 288
 289     //Push decrypted array as a string
 290         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 291         return 1;// return 1 to signal one return value
 292 }
 293
 294 static int l_aes128encrypt_cbc(lua_State *L)
 295 {
 296         //Check number of arguments
 297         int i;
 298     size_t size;
 299     const char *p_key = luaL_checklstring(L, 1, &size);
 300     if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 301
 302     const char *p_txt = luaL_checklstring(L, 2, &size);
 303
 304         unsigned char indata[16] = {0x00};
 305         unsigned char outdata[16] = {0x00};
 306     unsigned char aes_key[16] = {0x00};
 307         unsigned char iv[16] = {0x00};
 308
 309         for (i = 0; i < 32; i += 2) {
 310                 sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
 311                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 312         }
 313
 314     aes_context ctx;
 315     aes_init(&ctx);
 316         aes_setkey_enc(&ctx, aes_key, 128);
 317         aes_crypt_cbc(&ctx, AES_ENCRYPT, sizeof(indata), iv, indata, outdata );
 318         //Push encrypted array as a string
 319         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 320         return 1;// return 1 to signal one return value
 321 }
 322
 323 static int l_aes128encrypt_ecb(lua_State *L)
 324 {
 325         //Check number of arguments
 326         int i;
 327     size_t size;
 328     const char *p_key = luaL_checklstring(L, 1, &size);
 329     if(size != 32)  return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
 330
 331     const char *p_txt = luaL_checklstring(L, 2, &size);
 332
 333         unsigned char indata[16] = {0x00};
 334         unsigned char outdata[16] = {0x00};
 335     unsigned char aes_key[16] = {0x00};
 336
 337         for (i = 0; i < 32; i += 2) {
 338                 sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
 339                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 340         }
 341     aes_context ctx;
 342     aes_init(&ctx);
 343         aes_setkey_enc(&ctx, aes_key, 128);
 344         aes_crypt_ecb(&ctx, AES_ENCRYPT, indata, outdata );
 345         //Push encrypted array as a string
 346         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 347         return 1;// return 1 to signal one return value
 348 }
 349
 350
 351 static int l_crc16(lua_State *L)
 352 {
 353         size_t size;
 354         const char *p_str = luaL_checklstring(L, 1, &size);
 355
 356         uint16_t retval = crc16_ccitt( (uint8_t*) p_str, size);
 357     lua_pushinteger(L, (int) retval);
 358     return 1;
 359 }
 360
 361 static int l_crc64(lua_State *L)
 362 {
 363         size_t size;
 364         uint64_t crc = 0;
 365         unsigned char outdata[8] = {0x00};
 366
 367         const char *p_str = luaL_checklstring(L, 1, &size);
 368
 369         crc64( (uint8_t*) p_str, size, &crc);
 370
 371         outdata[0] = (uint8_t)(crc >> 56) & 0xff;
 372         outdata[1] = (uint8_t)(crc >> 48) & 0xff;
 373         outdata[2] = (uint8_t)(crc >> 40) & 0xff;
 374         outdata[3] = (uint8_t)(crc >> 32) & 0xff;
 375         outdata[4] = (uint8_t)(crc >> 24) & 0xff;
 376         outdata[5] = (uint8_t)(crc >> 16) & 0xff;
 377         outdata[6] = (uint8_t)(crc >> 8) & 0xff;
 378         outdata[7] = crc & 0xff;
 379         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 380         return 1;
 381 }
 382
 383 static int l_sha1(lua_State *L){
 384
 385         size_t size;
 386         const char *p_str = luaL_checklstring(L, 1, &size);
 387         unsigned char outdata[20] = {0x00};
 388     sha1( (uint8_t*) p_str, size, outdata);
 389     lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 390     return 1;
 391 }
 392
 393 /**
 394  * @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
 395  * able to do "require('foobar')" if foobar.lua is within lualibs folder.
 396  * Taken from http://stackoverflow.com/questions/4125971/setting-the-global-lua-path-variable-from-c-c
 397  * @param L
 398  * @param path
 399  * @return
 400  */
 401 int setLuaPath( lua_State* L, const char* path )
 402 {
 403     lua_getglobal( L, "package" );
 404     lua_getfield( L, -1, "path" ); // get field "path" from table at top of stack (-1)
 405     const char* cur_path = lua_tostring( L, -1 ); // grab path string from top of stack
 406     int requiredLength = strlen(cur_path)+ strlen(path)+10; //A few bytes too many, whatever we can afford it
 407     char * buf = malloc(requiredLength);
 408     snprintf(buf, requiredLength, "%s;%s", cur_path, path);
 409     lua_pop( L, 1 ); // get rid of the string on the stack we just pushed on line 5
 410     lua_pushstring( L, buf ); // push the new one
 411     lua_setfield( L, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
 412     lua_pop( L, 1 ); // get rid of package table from top of stack
 413         free(buf);
 414         return 0; // all done!
 415 }
 416
 417
 418 int set_pm3_libraries(lua_State *L)
 419 {
 420
 421     static const luaL_Reg libs[] = {
 422         {"SendCommand",                 l_SendCommand},
 423         {"WaitForResponseTimeout",      l_WaitForResponseTimeout},
 424         {"nonce2key",                   l_nonce2key},
 425         //{"PrintAndLog",                 l_PrintAndLog},
 426         {"foobar",                      l_foobar},
 427         {"ukbhit",                      l_ukbhit},
 428         {"clearCommandBuffer",          l_clearCommandBuffer},
 429                 {"console",                     l_CmdConsole},
 430                 {"iso15693_crc",                l_iso15693_crc},
 431                 {"aes128_decrypt",              l_aes128decrypt_cbc},
 432                 {"aes128_decrypt_ecb",          l_aes128decrypt_ecb},
 433                 {"aes128_encrypt",              l_aes128encrypt_cbc},
 434                 {"aes128_encrypt_ecb",          l_aes128encrypt_ecb},
 435                 {"crc16",                       l_crc16},
 436                 {"crc64",                       l_crc64},
 437                 {"sha1",                                                l_sha1},
 438         {NULL, NULL}
 439     };
 440
 441     lua_pushglobaltable(L);
 442     // Core library is in this table. Contains '
 443     //this is 'pm3' table
 444     lua_newtable(L);
 445
 446     //Put the function into the hash table.
 447     for (int i = 0; libs[i].name; i++) {
 448         lua_pushcfunction(L, libs[i].func);
 449         lua_setfield(L, -2, libs[i].name);//set the name, pop stack
 450     }
 451     //Name of 'core'
 452     lua_setfield(L, -2, "core");
 453
 454     //-- remove the global environment table from the stack
 455     lua_pop(L, 1);
 456
 457     //-- Last but not least, add to the LUA_PATH (package.path in lua)
 458     // so we can load libraries from the ./lualib/ - directory
 459     setLuaPath(L,"./lualibs/?.lua");
 460
 461     return 1;
 462 }