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 "../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(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_aes128encrypt(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_txt = 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         unsigned char iv[16] = {0x00};
 278
 279         for (i = 0; i < 32; i += 2) {
 280                 sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
 281                 sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
 282         }
 283
 284     aes_context ctx;
 285     aes_init(&ctx);
 286         aes_setkey_enc(&ctx, aes_key, 128);
 287         aes_crypt_cbc(&ctx, AES_ENCRYPT, sizeof(indata), iv, indata, outdata );
 288         //Push encrypted 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_crc16(lua_State *L)
 294 {
 295         size_t size;
 296         const char *p_str = luaL_checklstring(L, 1, &size);
 297
 298         uint16_t retval = crc16_ccitt( (uint8_t*) p_str, size);
 299     lua_pushinteger(L, (int) retval);
 300     return 1;
 301 }
 302
 303 static int l_crc64(lua_State *L)
 304 {
 305         size_t size;
 306         uint64_t crc = 0;
 307         unsigned char outdata[8] = {0x00};
 308
 309         const char *p_str = luaL_checklstring(L, 1, &size);
 310
 311         crc64( (uint8_t*) p_str, size, &crc);
 312
 313         outdata[0] = (uint8_t)(crc >> 56) & 0xff;
 314         outdata[1] = (uint8_t)(crc >> 48) & 0xff;
 315         outdata[2] = (uint8_t)(crc >> 40) & 0xff;
 316         outdata[3] = (uint8_t)(crc >> 32) & 0xff;
 317         outdata[4] = (uint8_t)(crc >> 24) & 0xff;
 318         outdata[5] = (uint8_t)(crc >> 16) & 0xff;
 319         outdata[6] = (uint8_t)(crc >> 8) & 0xff;
 320         outdata[7] = crc & 0xff;
 321         lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 322         return 1;
 323 }
 324
 325 static int l_sha1(lua_State *L){
 326
 327         size_t size;
 328         const char *p_str = luaL_checklstring(L, 1, &size);
 329         unsigned char outdata[20] = {0x00};
 330     sha1( (uint8_t*) p_str, size, outdata);
 331     lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
 332     return 1;
 333 }
 334
 335 /**
 336  * @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
 337  * able to do "require('foobar')" if foobar.lua is within lualibs folder.
 338  * Taken from http://stackoverflow.com/questions/4125971/setting-the-global-lua-path-variable-from-c-c
 339  * @param L
 340  * @param path
 341  * @return
 342  */
 343 int setLuaPath( lua_State* L, const char* path )
 344 {
 345     lua_getglobal( L, "package" );
 346     lua_getfield( L, -1, "path" ); // get field "path" from table at top of stack (-1)
 347     const char* cur_path = lua_tostring( L, -1 ); // grab path string from top of stack
 348     int requiredLength = strlen(cur_path)+ strlen(path)+10; //A few bytes too many, whatever we can afford it
 349     char * buf = malloc(requiredLength);
 350     snprintf(buf, requiredLength, "%s;%s", cur_path, path);
 351     lua_pop( L, 1 ); // get rid of the string on the stack we just pushed on line 5
 352     lua_pushstring( L, buf ); // push the new one
 353     lua_setfield( L, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
 354     lua_pop( L, 1 ); // get rid of package table from top of stack
 355         free(buf);
 356         return 0; // all done!
 357 }
 358
 359
 360 int set_pm3_libraries(lua_State *L)
 361 {
 362
 363     static const luaL_Reg libs[] = {
 364         {"SendCommand",                 l_SendCommand},
 365         {"WaitForResponseTimeout",      l_WaitForResponseTimeout},
 366         {"nonce2key",                   l_nonce2key},
 367         //{"PrintAndLog",                 l_PrintAndLog},
 368         {"foobar",                      l_foobar},
 369         {"ukbhit",                      l_ukbhit},
 370         {"clearCommandBuffer",          l_clearCommandBuffer},
 371                 {"console",                     l_CmdConsole},
 372                 {"iso15693_crc",                l_iso15693_crc},
 373                 {"aes128_decrypt",              l_aes128decrypt},
 374                 {"aes128_encrypt",              l_aes128encrypt},
 375                 {"crc16",                       l_crc16},
 376                 {"crc64",                       l_crc64},
 377                 {"sha1",                                                l_sha1},
 378         {NULL, NULL}
 379     };
 380
 381     lua_pushglobaltable(L);
 382     // Core library is in this table. Contains '
 383     //this is 'pm3' table
 384     lua_newtable(L);
 385
 386     //Put the function into the hash table.
 387     for (int i = 0; libs[i].name; i++) {
 388         lua_pushcfunction(L, libs[i].func);
 389         lua_setfield(L, -2, libs[i].name);//set the name, pop stack
 390     }
 391     //Name of 'core'
 392     lua_setfield(L, -2, "core");
 393
 394     //-- remove the global environment table from the stack
 395     lua_pop(L, 1);
 396
 397     //-- Last but not least, add to the LUA_PATH (package.path in lua)
 398     // so we can load libraries from the ./lualib/ - directory
 399     setLuaPath(L,"./lualibs/?.lua");
 400
 401     return 1;
 402 }