//-----------------------------------------------------------------------------
// Copyright (C) 2013 m h swende <martin at swende.se>
// Modified 2015,2016, iceman
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Some lua scripting glue to proxmark core.
//-----------------------------------------------------------------------------
#include "scripting.h"
/**
* The following params expected:
* UsbCommand c
*@brief l_SendCommand
* @param L
* @return
*/
static int l_SendCommand(lua_State *L){
/*
*
The SendCommand (native) expects the following structure:
typedef struct {
uint64_t cmd; //8 bytes
uint64_t arg[3]; // 8*3 bytes = 24 bytes
union {
uint8_t asBytes[USB_CMD_DATA_SIZE]; // 1 byte * 512 = 512 bytes (OR)
uint32_t asDwords[USB_CMD_DATA_SIZE/4]; // 4 byte * 128 = 512 bytes
} d;
} PACKED UsbCommand;
==> A 544 byte buffer will do.
**/
//Pop cmd
size_t size;
const char *data = luaL_checklstring(L, 1, &size);
if(size != sizeof(UsbCommand))
{
printf("Got data size %d, expected %d" , (int) size,(int) sizeof(UsbCommand));
lua_pushstring(L,"Wrong data size");
return 1;
}
SendCommand((UsbCommand* )data);
return 0; // no return values
}
/**
* @brief The following params expected:
* uint8_t *dest
* int bytes
* int start_index
* @param L
* @return
*/
static int l_GetFromBigBuf(lua_State *L){
int len = 0;
int startindex = 0;
//Check number of arguments
int n = lua_gettop(L);
if(n == 0) {
//signal error by returning Nil, errorstring
lua_pushnil(L);
lua_pushstring(L,"You need to supply number of len and startindex");
return 2; // two return values
}
if(n >= 2) {
len = luaL_checknumber(L, 1);
startindex = luaL_checknumber(L, 2);
}
uint8_t *data = malloc(len);
if ( data == NULL ) {
//signal error by returning Nil, errorstring
lua_pushnil(L);
lua_pushstring(L,"Allocating memory failed");
return 2; // two return values
}
GetFromBigBuf(data, len, startindex);
WaitForResponse(CMD_ACK, NULL);
//Push it as a string
lua_pushlstring(L,(const char *)data, len);
if (data)
free(data);
return 1;// return 1 to signal one return value
}
/**
* @brief The following params expected:
* uint32_t cmd
* size_t ms_timeout
* @param L
* @return
*/
static int l_WaitForResponseTimeout(lua_State *L){
uint32_t cmd = 0;
size_t ms_timeout = -1;
//Check number of arguments
int n = lua_gettop(L);
if(n == 0)
{
//signal error by returning Nil, errorstring
lua_pushnil(L);
lua_pushstring(L,"You need to supply at least command to wait for");
return 2; // two return values
}
if(n >= 1)
{
//pop cmd
cmd = luaL_checkunsigned(L,1);
}
if(n >= 2)
{
//Did the user send a timeout ?
//Check if the current top of stack is an integer
ms_timeout = luaL_checkunsigned(L,2);
//printf("Timeout set to %dms\n" , (int) ms_timeout);
}
UsbCommand response;
if(WaitForResponseTimeout(cmd, &response, ms_timeout)) {
//Push it as a string
lua_pushlstring(L,(const char *)&response, sizeof(UsbCommand));
return 1;// return 1 to signal one return value
}else{
//Push a Nil instead
lua_pushnil(L);
return 1;// one return value
}
}
static int returnToLuaWithError(lua_State *L, const char* fmt, ...) {
char buffer[200];
va_list args;
va_start(args,fmt);
vsnprintf(buffer, sizeof(buffer), fmt,args);
va_end(args);
lua_pushnil(L);
lua_pushstring(L,buffer);
return 2;
}
static int l_mfDarkside(lua_State *L){
uint32_t blockno = 0;
uint32_t keytype = 0;
uint64_t key = 0;
size_t size;
//Check number of arguments
int n = lua_gettop(L);
switch (n) {
case 2:{
const char *p_keytype = luaL_checklstring(L, 2, &size);
if(size != 2) return returnToLuaWithError(L,"Wrong size of keytype, got %d bytes, expected 1", (int) size);
sscanf(p_keytype, "%x", &keytype);
}
case 1: {
const char *p_blockno = luaL_checklstring(L, 1, &size);
if(size != 2) return returnToLuaWithError(L,"Wrong size of blockno, got %d bytes, expected 2", (int) size);
sscanf(p_blockno, "%02x", &blockno);
break;
}
default : break;
}
int retval = mfDarkside(blockno & 0xFF, keytype & 0xFF, &key);
//Push the retval on the stack
lua_pushinteger(L,retval);
//Push the key onto the stack
uint8_t dest_key[8];
num_to_bytes(key,sizeof(dest_key),dest_key);
//printf("Pushing to lua stack: %012" PRIx64 "\n",key);
lua_pushlstring(L,(const char *) dest_key,sizeof(dest_key));
return 2; //Two return values
}
//static int l_PrintAndLog(lua_State *L){ return CmdHF14AMfDump(luaL_checkstring(L, 1));}
static int l_clearCommandBuffer(lua_State *L){
clearCommandBuffer();
return 0;
}
/**
* @brief l_foobar is a dummy function to test lua-integration with
* @param L
* @return
*/
static int l_foobar(lua_State *L) {
//Check number of arguments
int n = lua_gettop(L);
printf("foobar called with %d arguments" , n);
lua_settop(L, 0);
printf("Arguments discarded, stack now contains %d elements", lua_gettop(L));
// todo: this is not used, where was it intended for?
// UsbCommand response = {CMD_MIFARE_READBL, {1337, 1338, 1339}};
printf("Now returning a uint64_t as a string");
uint64_t x = 0xDEADC0DE;
uint8_t destination[8];
num_to_bytes(x,sizeof(x),destination);
lua_pushlstring(L,(const char *)&x,sizeof(x));
lua_pushlstring(L,(const char *)destination,sizeof(destination));
return 2;
}
/**
* @brief Utility to check if a key has been pressed by the user. This method does not block.
* @param L
* @return boolean, true if kbhit, false otherwise.
*/
static int l_ukbhit(lua_State *L) {
lua_pushboolean(L,ukbhit() ? true : false);
return 1;
}
/**
* @brief Calls the command line parser to deal with the command. This enables
* lua-scripts to do stuff like "core.console('hf mf mifare')"
* @param L
* @return
*/
static int l_CmdConsole(lua_State *L) {
CommandReceived((char *)luaL_checkstring(L, 1));
return 0;
}
static int l_iso15693_crc(lua_State *L) {
// uint16_t Iso15693Crc(uint8_t *v, int n);
size_t size;
const char *v = luaL_checklstring(L, 1, &size);
// iceman, should be size / 2 ?!?
uint16_t retval = Iso15693Crc((uint8_t *) v, size);
lua_pushinteger(L, (int) retval);
return 1;
}
static int l_iso14443b_crc(lua_State *L) {
/* void ComputeCrc14443(int CrcType,
const unsigned char *Data, int Length,
unsigned char *TransmitFirst,
unsigned char *TransmitSecond)
*/
unsigned char buf[USB_CMD_DATA_SIZE] = {0x00};
size_t size = 0;
const char *data = luaL_checklstring(L, 1, &size);
for (int i = 0; i < size; i += 2)
sscanf(&data[i], "%02x", (unsigned int *)&buf[i / 2]);
size /= 2;
ComputeCrc14443(CRC_14443_B, buf, size, &buf[size], &buf[size+1]);
lua_pushlstring(L, (const char *)&buf, size+2);
return 1;
}
/*
Simple AES 128 cbc hook up to OpenSSL.
params: key, input
*/
static int l_aes128decrypt_cbc(lua_State *L) {
//Check number of arguments
int i;
size_t size;
const char *p_key = luaL_checklstring(L, 1, &size);
if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
const char *p_encTxt = luaL_checklstring(L, 2, &size);
unsigned char indata[16] = {0x00};
unsigned char outdata[16] = {0x00};
unsigned char aes_key[16] = {0x00};
unsigned char iv[16] = {0x00};
// convert key to bytearray and convert input to bytearray
for (i = 0; i < 32; i += 2) {
sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
}
aes_context ctx;
aes_init(&ctx);
aes_setkey_dec(&ctx, aes_key, 128);
aes_crypt_cbc(&ctx, AES_DECRYPT, sizeof(indata), iv, indata, outdata );
//Push decrypted array as a string
lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
return 1;// return 1 to signal one return value
}
static int l_aes128decrypt_ecb(lua_State *L)
{
//Check number of arguments
int i;
size_t size;
const char *p_key = luaL_checklstring(L, 1, &size);
if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
const char *p_encTxt = luaL_checklstring(L, 2, &size);
unsigned char indata[16] = {0x00};
unsigned char outdata[16] = {0x00};
unsigned char aes_key[16] = {0x00};
// convert key to bytearray and convert input to bytearray
for (i = 0; i < 32; i += 2) {
sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
}
aes_context ctx;
aes_init(&ctx);
aes_setkey_dec(&ctx, aes_key, 128);
aes_crypt_ecb(&ctx, AES_DECRYPT, indata, outdata );
//Push decrypted array as a string
lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
return 1;// return 1 to signal one return value
}
static int l_aes128encrypt_cbc(lua_State *L)
{
//Check number of arguments
int i;
size_t size;
const char *p_key = luaL_checklstring(L, 1, &size);
if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
const char *p_txt = luaL_checklstring(L, 2, &size);
unsigned char indata[16] = {0x00};
unsigned char outdata[16] = {0x00};
unsigned char aes_key[16] = {0x00};
unsigned char iv[16] = {0x00};
for (i = 0; i < 32; i += 2) {
sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
}
aes_context ctx;
aes_init(&ctx);
aes_setkey_enc(&ctx, aes_key, 128);
aes_crypt_cbc(&ctx, AES_ENCRYPT, sizeof(indata), iv, indata, outdata );
//Push encrypted array as a string
lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
return 1;// return 1 to signal one return value
}
static int l_aes128encrypt_ecb(lua_State *L)
{
//Check number of arguments
int i;
size_t size;
const char *p_key = luaL_checklstring(L, 1, &size);
if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
const char *p_txt = luaL_checklstring(L, 2, &size);
unsigned char indata[16] = {0x00};
unsigned char outdata[16] = {0x00};
unsigned char aes_key[16] = {0x00};
for (i = 0; i < 32; i += 2) {
sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
}
aes_context ctx;
aes_init(&ctx);
aes_setkey_enc(&ctx, aes_key, 128);
aes_crypt_ecb(&ctx, AES_ENCRYPT, indata, outdata );
//Push encrypted array as a string
lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
return 1;// return 1 to signal one return value
}
static int l_crc8legic(lua_State *L)
{
size_t size;
const char *p_str = luaL_checklstring(L, 1, &size);
uint16_t retval = CRC8Legic( (uint8_t*) p_str, size);
lua_pushinteger(L, (int) retval);
return 1;
}
static int l_crc16(lua_State *L)
{
size_t size;
const char *p_str = luaL_checklstring(L, 1, &size);
uint16_t retval = crc16_ccitt( (uint8_t*) p_str, size);
lua_pushinteger(L, (int) retval);
return 1;
}
static int l_crc64(lua_State *L)
{
size_t size;
uint64_t crc = 0;
unsigned char outdata[8] = {0x00};
const char *p_str = luaL_checklstring(L, 1, &size);
crc64( (uint8_t*) p_str, size, &crc);
outdata[0] = (uint8_t)(crc >> 56) & 0xff;
outdata[1] = (uint8_t)(crc >> 48) & 0xff;
outdata[2] = (uint8_t)(crc >> 40) & 0xff;
outdata[3] = (uint8_t)(crc >> 32) & 0xff;
outdata[4] = (uint8_t)(crc >> 24) & 0xff;
outdata[5] = (uint8_t)(crc >> 16) & 0xff;
outdata[6] = (uint8_t)(crc >> 8) & 0xff;
outdata[7] = crc & 0xff;
lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
return 1;
}
static int l_crc64_ecma182(lua_State *L)
{
//size_t size;
uint64_t crc = 0;
unsigned char outdata[8] = {0x00};
//const char *p_str = luaL_checklstring(L, 1, &size);
//init
//crc64_ecma182(NULL, 0, &crc);
crc = 0x338103260CC4;
// calc hash
//crc64_ecma182((uint8_t*) p_str, size, &crc);
outdata[0] = (uint8_t)(crc >> 56) & 0xff;
outdata[1] = (uint8_t)(crc >> 48) & 0xff;
outdata[2] = (uint8_t)(crc >> 40) & 0xff;
outdata[3] = (uint8_t)(crc >> 32) & 0xff;
outdata[4] = (uint8_t)(crc >> 24) & 0xff;
outdata[5] = (uint8_t)(crc >> 16) & 0xff;
outdata[6] = (uint8_t)(crc >> 8) & 0xff;
outdata[7] = crc & 0xff;
lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
return 1;
}
static int l_sha1(lua_State *L)
{
size_t size;
const char *p_str = luaL_checklstring(L, 1, &size);
unsigned char outdata[20] = {0x00};
sha1( (uint8_t*) p_str, size, outdata);
lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
return 1;
}
static int l_reveng_models(lua_State *L){
// This array needs to be adjusted if RevEng adds more crc-models.
char *models[100];
int count = 0;
int in_width = luaL_checkinteger(L, 1);
if( in_width > 89 ) return returnToLuaWithError(L,"Width cannot exceed 89, got %d", in_width);
// This array needs to be adjusted if RevEng adds more crc-models.
uint8_t width[100];
width[0] = (uint8_t)in_width;
int ans = GetModels(models, &count, width);
if (!ans) return 0;
lua_newtable(L);
for (int i = 0; i < count; i++){
lua_pushstring(L, (const char*)models[i]);
lua_rawseti(L,-2,i+1);
free(models[i]);
}
return 1;
}
//Called with 4 parameters.
// inModel ,string containing the crc model name: 'CRC-8'
// inHexStr ,string containing the hex representation of the data that will be used for CRC calculations.
// reverse ,int 0/1 (bool) if 1, calculate the reverse CRC
// endian ,char, 'B','b','L','l','t','r' describing if Big-Endian or Little-Endian should be used in different combinations.
//
// outputs: string with hex representation of the CRC result
static int l_reveng_RunModel(lua_State *L){
//-c || -v
//inModel = valid model name string - CRC-8
//inHexStr = input hex string to calculate crc on
//reverse = reverse calc option if true
//endian = {0 = calc default endian input and output, b = big endian input and output, B = big endian output, r = right justified
// l = little endian input and output, L = little endian output only, t = left justified}
//result = calculated crc hex string
char result[50];
const char *inModel = luaL_checkstring(L, 1);
const char *inHexStr = luaL_checkstring(L, 2);
bool reverse = lua_toboolean(L, 3);
const char endian = luaL_checkstring(L, 4)[0];
//PrintAndLog("mod: %s, hex: %s, rev %d", inModel, inHexStr, reverse);
// int RunModel(char *inModel, char *inHexStr, bool reverse, char endian, char *result)
int ans = RunModel( (char *)inModel, (char *)inHexStr, reverse, endian, result);
if (!ans)
return returnToLuaWithError(L,"Reveng failed");
lua_pushstring(L, (const char*)result);
return 1;
}
static int l_hardnested(lua_State *L){
bool haveTarget = true;
size_t size;
const char *p_blockno = luaL_checklstring(L, 1, &size);
if(size != 2) return returnToLuaWithError(L,"Wrong size of blockNo, got %d bytes, expected 2", (int) size);
const char *p_keytype = luaL_checklstring(L, 2, &size);
if(size != 1) return returnToLuaWithError(L,"Wrong size of keyType, got %d bytes, expected 1", (int) size);
const char *p_key = luaL_checklstring(L, 3, &size);
if(size != 12) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 12", (int) size);
const char *p_trg_blockno = luaL_checklstring(L, 4, &size);
if(size != 2) return returnToLuaWithError(L,"Wrong size of trgBlockNo, got %d bytes, expected 2", (int) size);
const char *p_trg_keytype = luaL_checklstring(L, 5, &size);
if(size != 1) return returnToLuaWithError(L,"Wrong size of trgKeyType, got %d bytes, expected 1", (int) size);
const char *p_trgkey = luaL_checklstring(L, 6, &size);
if(size != 12)
haveTarget = false;
const char *p_nonce_file_read = luaL_checklstring(L, 7, &size);
if(size != 1) return returnToLuaWithError(L,"Wrong size of nonce_file_read, got %d bytes, expected 1", (int) size);
const char *p_nonce_file_write = luaL_checklstring(L, 8, &size);
if(size != 1) return returnToLuaWithError(L,"Wrong size of nonce_file_write, got %d bytes, expected 1", (int) size);
const char *p_slow = luaL_checklstring(L, 9, &size);
if(size != 1) return returnToLuaWithError(L,"Wrong size of slow, got %d bytes, expected 1", (int) size);
const char *p_tests = luaL_checklstring(L, 10, &size);
if(size != 1) return returnToLuaWithError(L,"Wrong size of tests, got %d bytes, expected 1", (int) size);
uint32_t blockNo = 0, keyType = 0;
uint32_t trgBlockNo = 0, trgKeyType = 0;
uint32_t slow = 0, tests = 0;
uint32_t nonce_file_read = 0, nonce_file_write = 0;
sscanf(p_blockno, "%02x", &blockNo);
sscanf(p_keytype, "%x", &keyType);
sscanf(p_trg_blockno, "%02x", &trgBlockNo);
sscanf(p_trg_keytype, "%x", &trgKeyType);
sscanf(p_nonce_file_read, "%x", &nonce_file_read);
sscanf(p_nonce_file_write, "%x", &nonce_file_write);
sscanf(p_slow, "%x", &slow);
sscanf(p_tests, "%x", &tests);
uint8_t key[6] = {0,0,0,0,0,0};
uint8_t trgkey[6] = {0,0,0,0,0,0};
for (int i = 0; i < 32; i += 2) {
sscanf(&p_key[i], "%02x", (unsigned int *)&key[i / 2]);
if (haveTarget)
sscanf(&p_trgkey[i], "%02x", (unsigned int *)&trgkey[i / 2]);
}
uint64_t foundkey = 0;
int retval = mfnestedhard(blockNo, keyType, key, trgBlockNo, trgKeyType, haveTarget ? trgkey : NULL, nonce_file_read, nonce_file_write, slow, tests, &foundkey);
//Push the retval on the stack
lua_pushinteger(L,retval);
//Push the key onto the stack
uint8_t dest_key[6];
num_to_bytes(foundkey, sizeof(dest_key), dest_key);
//printf("Pushing to lua stack: %012" PRIx64 "\n",key);
lua_pushlstring(L, (const char *) dest_key, sizeof(dest_key));
return 2; //Two return values
}
/**
* @brief l_validate_prng is a function to test is a nonce is using the weak PRNG
* @param L
* @return
*/
static int l_detect_prng(lua_State *L) {
bool valid = detect_classic_prng();
//Push the retval on the stack
lua_pushinteger(L, valid);
return 1;
}
/**
* @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
* able to do "require('foobar')" if foobar.lua is within lualibs folder.
* Taken from http://stackoverflow.com/questions/4125971/setting-the-global-lua-path-variable-from-c-c
* @param L
* @param path
* @return
*/
int setLuaPath( lua_State* L, const char* path ) {
lua_getglobal( L, "package" );
lua_getfield( L, -1, "path" ); // get field "path" from table at top of stack (-1)
const char* cur_path = lua_tostring( L, -1 ); // grab path string from top of stack
int requiredLength = strlen(cur_path)+ strlen(path)+10; //A few bytes too many, whatever we can afford it
char * buf = malloc(requiredLength);
snprintf(buf, requiredLength, "%s;%s", cur_path, path);
lua_pop( L, 1 ); // get rid of the string on the stack we just pushed on line 5
lua_pushstring( L, buf ); // push the new one
lua_setfield( L, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
lua_pop( L, 1 ); // get rid of package table from top of stack
free(buf);
return 0; // all done!
}
int set_pm3_libraries(lua_State *L) {
static const luaL_Reg libs[] = {
{"SendCommand", l_SendCommand},
{"GetFromBigBuf", l_GetFromBigBuf},
{"WaitForResponseTimeout", l_WaitForResponseTimeout},
{"mfDarkside", l_mfDarkside},
{"foobar", l_foobar},
{"ukbhit", l_ukbhit},
{"clearCommandBuffer", l_clearCommandBuffer},
{"console", l_CmdConsole},
{"iso15693_crc", l_iso15693_crc},
{"iso14443b_crc", l_iso14443b_crc},
{"aes128_decrypt", l_aes128decrypt_cbc},
{"aes128_decrypt_ecb", l_aes128decrypt_ecb},
{"aes128_encrypt", l_aes128encrypt_cbc},
{"aes128_encrypt_ecb", l_aes128encrypt_ecb},
{"crc8legic", l_crc8legic},
{"crc16", l_crc16},
{"crc64", l_crc64},
{"crc64_ecma182", l_crc64_ecma182},
{"sha1", l_sha1},
{"reveng_models", l_reveng_models},
{"reveng_runmodel", l_reveng_RunModel},
{"hardnested", l_hardnested},
{"detect_prng", l_detect_prng},
{NULL, NULL}
};
lua_pushglobaltable(L);
// Core library is in this table. Contains '
//this is 'pm3' table
lua_newtable(L);
//Put the function into the hash table.
for (int i = 0; libs[i].name; i++) {
lua_pushcfunction(L, libs[i].func);
lua_setfield(L, -2, libs[i].name);//set the name, pop stack
}
//Name of 'core'
lua_setfield(L, -2, "core");
//-- remove the global environment table from the stack
lua_pop(L, 1);
//-- Last but not least, add to the LUA_PATH (package.path in lua)
// so we can load libraries from the ./lualib/ - directory
char libraries_path[strlen(get_my_executable_directory()) + strlen(LUA_LIBRARIES_DIRECTORY) + strlen(LUA_LIBRARIES_WILDCARD) + 1];
strcpy(libraries_path, get_my_executable_directory());
strcat(libraries_path, LUA_LIBRARIES_DIRECTORY);
strcat(libraries_path, LUA_LIBRARIES_WILDCARD);
setLuaPath(L, libraries_path);
return 1;
}