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