[proxmark3-svn] / client / scripting.c

//-----------------------------------------------------------------------------
// Copyright (C) 2013 m h swende <martin at swende.se>
//
// 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 <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include "proxmark3.h"
#include "usb_cmd.h"
#include "cmdmain.h"
#include "scripting.h"
#include "util.h"
#include "nonce2key/nonce2key.h"
#include "../common/iso15693tools.h"
#include "iso14443crc.h"
#include "../common/crc16.h"
#include "../common/crc64.h"
#include "../common/sha1.h"
#include "aes.h"
#include "cmdcrc.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;
	}

//    UsbCommand c = (*data);
	SendCommand((UsbCommand* )data);
	return 0; // no return values
}
/**
 * @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_nonce2key(lua_State *L){

	size_t size;
	const char *p_uid = luaL_checklstring(L, 1, &size);
	if(size != 4)  return returnToLuaWithError(L,"Wrong size of uid, got %d bytes, expected 4", (int) size);

	const char *p_nt = luaL_checklstring(L, 2, &size);
	if(size != 4)  return returnToLuaWithError(L,"Wrong size of nt, got %d bytes, expected 4", (int) size);

	const char *p_nr = luaL_checklstring(L, 3, &size);
	if(size != 4)  return returnToLuaWithError(L,"Wrong size of nr, got %d bytes, expected 4", (int) size);

	const char *p_par_info = luaL_checklstring(L, 4, &size);
	if(size != 8)  return returnToLuaWithError(L,"Wrong size of par_info, got %d bytes, expected 8", (int) size);

	const char *p_pks_info = luaL_checklstring(L, 5, &size);
	if(size != 8)  return returnToLuaWithError(L,"Wrong size of ks_info, got %d bytes, expected 8", (int) size);


	uint32_t uid = bytes_to_num(( uint8_t *)p_uid,4);
	uint32_t nt = bytes_to_num(( uint8_t *)p_nt,4);

	uint32_t nr = bytes_to_num(( uint8_t*)p_nr,4);
	uint64_t par_info = bytes_to_num(( uint8_t *)p_par_info,8);
	uint64_t ks_info = bytes_to_num(( uint8_t *)p_pks_info,8);

	uint64_t key = 0;

	int retval = nonce2key(uid,nt, nr, par_info,ks_info, &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"llx"\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 = 0xDEADBEEF;
	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);
	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];
	size_t len = 0;
	const char *data = luaL_checklstring(L, 1, &len);
	if (USB_CMD_DATA_SIZE < len)
		len =  USB_CMD_DATA_SIZE-2;

	for (int i = 0; i < len; i += 2) {
		sscanf(&data[i], "%02x", (unsigned int *)&buf[i / 2]);
	}
	ComputeCrc14443(CRC_14443_B, buf, len, &buf[len], &buf[len+1]);

	lua_pushlstring(L, (const char *)&buf, len+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_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_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){

	char *models[80];
	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);

	uint8_t width[80];
	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;
}

/**
 * @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},
		{"WaitForResponseTimeout",      l_WaitForResponseTimeout},
		{"nonce2key",                   l_nonce2key},
		//{"PrintAndLog",                 l_PrintAndLog},
		{"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},
		{"crc16",                       l_crc16},
		{"crc64",                       l_crc64},
		{"sha1",                        l_sha1},
		{"reveng_models",               l_reveng_models},
		{"reveng_runmodel",             l_reveng_RunModel},
		{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
	setLuaPath(L,"./lualibs/?.lua");

	return 1;
}
Commit	Line	Data
5b760b6c	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"
44fffc54	18	#include "util.h"
2dcdf1a6	19	#include "nonce2key/nonce2key.h"
77cd612f	20	#include "../common/iso15693tools.h"
be2d41b7	21	#include "iso14443crc.h"
b915fda3	22	#include "../common/crc16.h"
d730878d	23	#include "../common/crc64.h"
1c4c0b06	24	#include "../common/sha1.h"
1f6417a9	25	#include "aes.h"
2e163546	26	#include "cmdcrc.h"
5b760b6c	27	/**
	28	* The following params expected:
	29	* UsbCommand c
	30	*@brief l_SendCommand
	31	* @param L
	32	* @return
	33	*/
	34	static int l_SendCommand(lua_State *L){
	35
d730878d	36	/*
	37	*
	38	The SendCommand (native) expects the following structure:
	39
	40	typedef struct {
	41	uint64_t cmd; //8 bytes
	42	uint64_t arg[3]; // 8*3 bytes = 24 bytes
	43	union {
	44	uint8_t asBytes[USB_CMD_DATA_SIZE]; // 1 byte * 512 = 512 bytes (OR)
	45	uint32_t asDwords[USB_CMD_DATA_SIZE/4]; // 4 byte * 128 = 512 bytes
	46	} d;
	47	} PACKED UsbCommand;
	48
	49	==> A 544 byte buffer will do.
	50	**/
	51	//Pop cmd
	52	size_t size;
	53	const char *data = luaL_checklstring(L, 1, &size);
	54	if(size != sizeof(UsbCommand))
	55	{
	56	printf("Got data size %d, expected %d" , (int) size,(int) sizeof(UsbCommand));
	57	lua_pushstring(L,"Wrong data size");
	58	return 1;
	59	}
96e7a3a5	60
96e7a3a5	61	// UsbCommand c = (*data);
d730878d	62	SendCommand((UsbCommand* )data);
d730878d	63	return 0; // no return values
5b760b6c	64	}
	65	/**
	66	* @brief The following params expected:
	67	* uint32_t cmd
	68	* size_t ms_timeout
	69	* @param L
	70	* @return
	71	*/
	72	static int l_WaitForResponseTimeout(lua_State *L){
	73
d730878d	74	uint32_t cmd = 0;
	75	size_t ms_timeout = -1;
	76
	77	//Check number of arguments
	78	int n = lua_gettop(L);
	79	if(n == 0)
	80	{
	81	//signal error by returning Nil, errorstring
	82	lua_pushnil(L);
	83	lua_pushstring(L,"You need to supply at least command to wait for");
	84	return 2; // two return values
	85	}
	86	if(n >= 1)
	87	{
	88	//pop cmd
	89	cmd = luaL_checkunsigned(L,1);
	90	}
	91	if(n >= 2)
	92	{
	93	//Did the user send a timeout ?
	94	//Check if the current top of stack is an integer
	95	ms_timeout = luaL_checkunsigned(L,2);
	96	//printf("Timeout set to %dms\n" , (int) ms_timeout);
	97	}
	98
	99	UsbCommand response;
	100
	101	if(WaitForResponseTimeout(cmd, &response, ms_timeout))
	102	{
	103	//Push it as a string
	104	lua_pushlstring(L,(const char *)&response,sizeof(UsbCommand));
	105
	106	return 1;// return 1 to signal one return value
	107	}else{
	108	//Push a Nil instead
	109	lua_pushnil(L);
	110	return 1;// one return value
	111	}
5b760b6c	112	}
2dcdf1a6	113
	114	static int returnToLuaWithError(lua_State L, const char fmt, ...)
	115	{
d730878d	116	char buffer[200];
	117	va_list args;
	118	va_start(args,fmt);
	119	vsnprintf(buffer, sizeof(buffer), fmt,args);
	120	va_end(args);
	121
	122	lua_pushnil(L);
	123	lua_pushstring(L,buffer);
	124	return 2;
2dcdf1a6	125	}
	126
	127	static int l_nonce2key(lua_State *L){
	128
d730878d	129	size_t size;
	130	const char *p_uid = luaL_checklstring(L, 1, &size);
	131	if(size != 4) return returnToLuaWithError(L,"Wrong size of uid, got %d bytes, expected 4", (int) size);
	132
	133	const char *p_nt = luaL_checklstring(L, 2, &size);
	134	if(size != 4) return returnToLuaWithError(L,"Wrong size of nt, got %d bytes, expected 4", (int) size);
2dcdf1a6	135
d730878d	136	const char *p_nr = luaL_checklstring(L, 3, &size);
d730878d	137	if(size != 4) return returnToLuaWithError(L,"Wrong size of nr, got %d bytes, expected 4", (int) size);
2dcdf1a6	138
d730878d	139	const char *p_par_info = luaL_checklstring(L, 4, &size);
d730878d	140	if(size != 8) return returnToLuaWithError(L,"Wrong size of par_info, got %d bytes, expected 8", (int) size);
2dcdf1a6	141
d730878d	142	const char *p_pks_info = luaL_checklstring(L, 5, &size);
d730878d	143	if(size != 8) return returnToLuaWithError(L,"Wrong size of ks_info, got %d bytes, expected 8", (int) size);
2dcdf1a6	144
2dcdf1a6	145
d730878d	146	uint32_t uid = bytes_to_num(( uint8_t *)p_uid,4);
d730878d	147	uint32_t nt = bytes_to_num(( uint8_t *)p_nt,4);
2dcdf1a6	148
d730878d	149	uint32_t nr = bytes_to_num(( uint8_t*)p_nr,4);
	150	uint64_t par_info = bytes_to_num(( uint8_t *)p_par_info,8);
	151	uint64_t ks_info = bytes_to_num(( uint8_t *)p_pks_info,8);
2dcdf1a6	152
d730878d	153	uint64_t key = 0;
2dcdf1a6	154
d730878d	155	int retval = nonce2key(uid,nt, nr, par_info,ks_info, &key);
2dcdf1a6	156
d730878d	157	//Push the retval on the stack
d730878d	158	lua_pushinteger(L,retval);
2dcdf1a6	159
d730878d	160	//Push the key onto the stack
	161	uint8_t dest_key[8];
	162	num_to_bytes(key,sizeof(dest_key),dest_key);
b9697139	163
d730878d	164	//printf("Pushing to lua stack: %012"llx"\n",key);
d730878d	165	lua_pushlstring(L,(const char *) dest_key,sizeof(dest_key));
2dcdf1a6	166
d730878d	167	return 2; //Two return values
2dcdf1a6	168	}
42daa759	169	//static int l_PrintAndLog(lua_State *L){ return CmdHF14AMfDump(luaL_checkstring(L, 1));}
44fffc54	170	static int l_clearCommandBuffer(lua_State *L){
d730878d	171	clearCommandBuffer();
d730878d	172	return 0;
44fffc54	173	}
	174	/**
	175	* @brief l_foobar is a dummy function to test lua-integration with
	176	* @param L
	177	* @return
	178	*/
	179	static int l_foobar(lua_State *L)
	180	{
d730878d	181	//Check number of arguments
	182	int n = lua_gettop(L);
	183	printf("foobar called with %d arguments" , n);
	184	lua_settop(L, 0);
	185	printf("Arguments discarded, stack now contains %d elements", lua_gettop(L));
	186
	187	// todo: this is not used, where was it intended for?
	188	// UsbCommand response = {CMD_MIFARE_READBL, {1337, 1338, 1339}};
	189
	190	printf("Now returning a uint64_t as a string");
	191	uint64_t x = 0xDEADBEEF;
	192	uint8_t destination[8];
	193	num_to_bytes(x,sizeof(x),destination);
	194	lua_pushlstring(L,(const char *)&x,sizeof(x));
	195	lua_pushlstring(L,(const char *)destination,sizeof(destination));
	196
	197	return 2;
44fffc54	198	}
44fffc54	199
2dcdf1a6	200
44fffc54	201	/**
	202	* @brief Utility to check if a key has been pressed by the user. This method does not block.
	203	* @param L
	204	* @return boolean, true if kbhit, false otherwise.
	205	*/
	206	static int l_ukbhit(lua_State *L)
	207	{
d730878d	208	lua_pushboolean(L,ukbhit() ? true : false);
d730878d	209	return 1;
44fffc54	210	}
0a85b725	211	/**
	212	* @brief Calls the command line parser to deal with the command. This enables
	213	* lua-scripts to do stuff like "core.console('hf mf mifare')"
	214	* @param L
	215	* @return
	216	*/
	217	static int l_CmdConsole(lua_State *L)
	218	{
d730878d	219	CommandReceived((char *)luaL_checkstring(L, 1));
d730878d	220	return 0;
0a85b725	221	}
0a85b725	222
77cd612f	223	static int l_iso15693_crc(lua_State *L)
77cd612f	224	{
d730878d	225	// uint16_t Iso15693Crc(uint8_t *v, int n);
	226	size_t size;
	227	const char *v = luaL_checklstring(L, 1, &size);
	228	uint16_t retval = Iso15693Crc((uint8_t *) v, size);
	229	lua_pushinteger(L, (int) retval);
	230	return 1;
77cd612f	231	}
5b760b6c	232
be2d41b7	233	static int l_iso14443b_crc(lua_State *L)
	234	{
	235	/* void ComputeCrc14443(int CrcType,
	236	const unsigned char *Data, int Length,
	237	unsigned char *TransmitFirst,
	238	unsigned char *TransmitSecond)
	239	*/
	240	unsigned char buf[USB_CMD_DATA_SIZE];
	241	size_t len = 0;
	242	const char *data = luaL_checklstring(L, 1, &len);
	243	if (USB_CMD_DATA_SIZE < len)
	244	len = USB_CMD_DATA_SIZE-2;
	245
	246	for (int i = 0; i < len; i += 2) {
	247	sscanf(&data[i], "%02x", (unsigned int *)&buf[i / 2]);
	248	}
	249	ComputeCrc14443(CRC_14443_B, buf, len, &buf[len], &buf[len+1]);
	250
	251	lua_pushlstring(L, (const char *)&buf, len+2);
	252	return 1;
	253	}
b915fda3	254	/*
	255	Simple AES 128 cbc hook up to OpenSSL.
	256	params: key, input
	257	*/
1c4c0b06	258	static int l_aes128decrypt_cbc(lua_State *L)
b915fda3	259	{
	260	//Check number of arguments
	261	int i;
d730878d	262	size_t size;
	263	const char *p_key = luaL_checklstring(L, 1, &size);
	264	if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
	265
	266	const char *p_encTxt = luaL_checklstring(L, 2, &size);
b915fda3	267
1f6417a9 MHS	268	unsigned char indata[16] = {0x00};
1f6417a9 MHS	269	unsigned char outdata[16] = {0x00};
d730878d	270	unsigned char aes_key[16] = {0x00};
1f6417a9	271	unsigned char iv[16] = {0x00};
d730878d	272
d730878d	273	// convert key to bytearray and convert input to bytearray
b915fda3	274	for (i = 0; i < 32; i += 2) {
b915fda3	275	sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
d730878d	276	sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
b915fda3	277	}
d730878d	278
	279	aes_context ctx;
	280	aes_init(&ctx);
	281	aes_setkey_dec(&ctx, aes_key, 128);
	282	aes_crypt_cbc(&ctx,AES_DECRYPT,sizeof(indata), iv, indata,outdata );
	283	//Push decrypted array as a string
	284	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	285	return 1;// return 1 to signal one return value
	286	}
1c4c0b06	287	static int l_aes128decrypt_ecb(lua_State *L)
	288	{
	289	//Check number of arguments
	290	int i;
	291	size_t size;
	292	const char *p_key = luaL_checklstring(L, 1, &size);
	293	if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
	294
	295	const char *p_encTxt = luaL_checklstring(L, 2, &size);
	296
	297	unsigned char indata[16] = {0x00};
	298	unsigned char outdata[16] = {0x00};
	299	unsigned char aes_key[16] = {0x00};
	300
	301	// convert key to bytearray and convert input to bytearray
	302	for (i = 0; i < 32; i += 2) {
	303	sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
	304	sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
	305	}
	306	aes_context ctx;
	307	aes_init(&ctx);
	308	aes_setkey_dec(&ctx, aes_key, 128);
	309	aes_crypt_ecb(&ctx, AES_DECRYPT, indata, outdata );
	310
	311	//Push decrypted array as a string
	312	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	313	return 1;// return 1 to signal one return value
	314	}
	315
	316	static int l_aes128encrypt_cbc(lua_State *L)
d730878d	317	{
	318	//Check number of arguments
	319	int i;
	320	size_t size;
	321	const char *p_key = luaL_checklstring(L, 1, &size);
	322	if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
	323
	324	const char *p_txt = luaL_checklstring(L, 2, &size);
	325
	326	unsigned char indata[16] = {0x00};
	327	unsigned char outdata[16] = {0x00};
	328	unsigned char aes_key[16] = {0x00};
	329	unsigned char iv[16] = {0x00};
b915fda3	330
b915fda3	331	for (i = 0; i < 32; i += 2) {
d730878d	332	sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
b915fda3	333	sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
b915fda3	334	}
1f6417a9	335
d730878d	336	aes_context ctx;
	337	aes_init(&ctx);
	338	aes_setkey_enc(&ctx, aes_key, 128);
	339	aes_crypt_cbc(&ctx, AES_ENCRYPT, sizeof(indata), iv, indata, outdata );
	340	//Push encrypted array as a string
b915fda3	341	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	342	return 1;// return 1 to signal one return value
	343	}
	344
1c4c0b06	345	static int l_aes128encrypt_ecb(lua_State *L)
	346	{
	347	//Check number of arguments
	348	int i;
	349	size_t size;
	350	const char *p_key = luaL_checklstring(L, 1, &size);
	351	if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
	352
	353	const char *p_txt = luaL_checklstring(L, 2, &size);
	354
	355	unsigned char indata[16] = {0x00};
	356	unsigned char outdata[16] = {0x00};
	357	unsigned char aes_key[16] = {0x00};
	358
	359	for (i = 0; i < 32; i += 2) {
	360	sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
	361	sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
	362	}
	363	aes_context ctx;
	364	aes_init(&ctx);
	365	aes_setkey_enc(&ctx, aes_key, 128);
	366	aes_crypt_ecb(&ctx, AES_ENCRYPT, indata, outdata );
	367	//Push encrypted array as a string
	368	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	369	return 1;// return 1 to signal one return value
	370	}
	371
b915fda3	372	static int l_crc16(lua_State *L)
	373	{
	374	size_t size;
	375	const char *p_str = luaL_checklstring(L, 1, &size);
d730878d	376
b915fda3	377	uint16_t retval = crc16_ccitt( (uint8_t*) p_str, size);
d730878d	378	lua_pushinteger(L, (int) retval);
	379	return 1;
	380	}
	381
	382	static int l_crc64(lua_State *L)
	383	{
	384	size_t size;
	385	uint64_t crc = 0;
	386	unsigned char outdata[8] = {0x00};
	387
	388	const char *p_str = luaL_checklstring(L, 1, &size);
	389
	390	crc64( (uint8_t*) p_str, size, &crc);
	391
	392	outdata[0] = (uint8_t)(crc >> 56) & 0xff;
	393	outdata[1] = (uint8_t)(crc >> 48) & 0xff;
	394	outdata[2] = (uint8_t)(crc >> 40) & 0xff;
	395	outdata[3] = (uint8_t)(crc >> 32) & 0xff;
	396	outdata[4] = (uint8_t)(crc >> 24) & 0xff;
	397	outdata[5] = (uint8_t)(crc >> 16) & 0xff;
	398	outdata[6] = (uint8_t)(crc >> 8) & 0xff;
	399	outdata[7] = crc & 0xff;
	400	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	401	return 1;
b915fda3	402	}
b915fda3	403
1c4c0b06	404	static int l_sha1(lua_State *L)
	405	{
	406	size_t size;
	407	const char *p_str = luaL_checklstring(L, 1, &size);
	408	unsigned char outdata[20] = {0x00};
	409	sha1( (uint8_t*) p_str, size, outdata);
	410	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	411	return 1;
	412	}
	413
2e163546	414	static int l_reveng_models(lua_State *L){
	415
	416	char *models[80];
	417	int count = 0;
53ee28cb	418	int in_width = luaL_checkinteger(L, 1);
2e163546	419
	420	if( in_width > 89 ) return returnToLuaWithError(L,"Width cannot exceed 89, got %d", in_width);
	421
d2219cae	422	uint8_t width[80];
	423	width[0] = (uint8_t)in_width;
	424	int ans = GetModels(models, &count, width);
2e163546	425	if (!ans) return 0;
	426
	427	lua_newtable(L);
	428
	429	for (int i = 0; i < count; i++){
	430	lua_pushstring(L, (const char*)models[i]);
	431	lua_rawseti(L,-2,i+1);
	432	free(models[i]);
	433	}
	434
	435	return 1;
	436	}
	437
53ee28cb	438	//Called with 4 parameters.
	439	// inModel ,string containing the crc model name: 'CRC-8'
	440	// inHexStr ,string containing the hex representation of the data that will be used for CRC calculations.
	441	// reverse ,int 0/1 (bool) if 1, calculate the reverse CRC
	442	// endian ,char, 'B','b','L','l','t','r' describing if Big-Endian or Little-Endian should be used in different combinations.
	443	//
	444	// outputs: string with hex representation of the CRC result
2e163546	445	static int l_reveng_RunModel(lua_State *L){
	446	//-c \|\| -v
	447	//inModel = valid model name string - CRC-8
	448	//inHexStr = input hex string to calculate crc on
	449	//reverse = reverse calc option if true
	450	//endian = {0 = calc default endian input and output, b = big endian input and output, B = big endian output, r = right justified
	451	// l = little endian input and output, L = little endian output only, t = left justified}
	452	//result = calculated crc hex string
	453	char result[50];
	454
53ee28cb	455	const char *inModel = luaL_checkstring(L, 1);
	456	const char *inHexStr = luaL_checkstring(L, 2);
	457	bool reverse = lua_toboolean(L, 3);
	458	const char endian = luaL_checkstring(L, 4)[0];
2e163546	459
	460	//PrintAndLog("mod: %s, hex: %s, rev %d", inModel, inHexStr, reverse);
	461	//int RunModel(char inModel, char inHexStr, bool reverse, char endian, char *result)
53ee28cb	462	int ans = RunModel( (char )inModel, (char )inHexStr, reverse, endian, result);
2e163546	463	if (!ans)
	464	return returnToLuaWithError(L,"Reveng failed");
	465
	466	lua_pushstring(L, (const char*)result);
	467	return 1;
	468	}
	469
686f0a17	470	/**
	471	* @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
	472	* able to do "require('foobar')" if foobar.lua is within lualibs folder.
	473	* Taken from http://stackoverflow.com/questions/4125971/setting-the-global-lua-path-variable-from-c-c
	474	* @param L
	475	* @param path
	476	* @return
	477	*/
	478	int setLuaPath( lua_State* L, const char* path )
	479	{
d730878d	480	lua_getglobal( L, "package" );
	481	lua_getfield( L, -1, "path" ); // get field "path" from table at top of stack (-1)
	482	const char* cur_path = lua_tostring( L, -1 ); // grab path string from top of stack
	483	int requiredLength = strlen(cur_path)+ strlen(path)+10; //A few bytes too many, whatever we can afford it
	484	char * buf = malloc(requiredLength);
	485	snprintf(buf, requiredLength, "%s;%s", cur_path, path);
	486	lua_pop( L, 1 ); // get rid of the string on the stack we just pushed on line 5
	487	lua_pushstring( L, buf ); // push the new one
	488	lua_setfield( L, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
	489	lua_pop( L, 1 ); // get rid of package table from top of stack
	490	free(buf);
	491	return 0; // all done!
686f0a17	492	}
	493
	494
f057bddb	495	int set_pm3_libraries(lua_State *L)
5b760b6c	496	{
686f0a17	497
d730878d	498	static const luaL_Reg libs[] = {
	499	{"SendCommand", l_SendCommand},
	500	{"WaitForResponseTimeout", l_WaitForResponseTimeout},
	501	{"nonce2key", l_nonce2key},
	502	//{"PrintAndLog", l_PrintAndLog},
	503	{"foobar", l_foobar},
	504	{"ukbhit", l_ukbhit},
	505	{"clearCommandBuffer", l_clearCommandBuffer},
	506	{"console", l_CmdConsole},
	507	{"iso15693_crc", l_iso15693_crc},
be2d41b7	508	{"iso14443b_crc", l_iso14443b_crc},
1c4c0b06	509	{"aes128_decrypt", l_aes128decrypt_cbc},
	510	{"aes128_decrypt_ecb", l_aes128decrypt_ecb},
	511	{"aes128_encrypt", l_aes128encrypt_cbc},
	512	{"aes128_encrypt_ecb", l_aes128encrypt_ecb},
b915fda3	513	{"crc16", l_crc16},
d730878d	514	{"crc64", l_crc64},
1c4c0b06	515	{"sha1", l_sha1},
2e163546	516	{"reveng_models", l_reveng_models},
2e163546	517	{"reveng_runmodel", l_reveng_RunModel},
d730878d	518	{NULL, NULL}
	519	};
	520
	521	lua_pushglobaltable(L);
	522	// Core library is in this table. Contains '
	523	//this is 'pm3' table
	524	lua_newtable(L);
	525
	526	//Put the function into the hash table.
	527	for (int i = 0; libs[i].name; i++) {
	528	lua_pushcfunction(L, libs[i].func);
	529	lua_setfield(L, -2, libs[i].name);//set the name, pop stack
	530	}
	531	//Name of 'core'
	532	lua_setfield(L, -2, "core");
	533
	534	//-- remove the global environment table from the stack
	535	lua_pop(L, 1);
	536
	537	//-- Last but not least, add to the LUA_PATH (package.path in lua)
	538	// so we can load libraries from the ./lualib/ - directory
	539	setLuaPath(L,"./lualibs/?.lua");
	540
	541	return 1;
5b760b6c	542	}