[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"
/**
 * 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;
}

/**
 * @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},
		{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"
5b760b6c	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
d730878d	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	}
96e7a3a5	59
96e7a3a5	60	// UsbCommand c = (*data);
d730878d	61	SendCommand((UsbCommand* )data);
d730878d	62	return 0; // no return values
5b760b6c	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
d730878d	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	}
5b760b6c	111	}
2dcdf1a6	112
	113	static int returnToLuaWithError(lua_State L, const char fmt, ...)
	114	{
d730878d	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;
2dcdf1a6	124	}
	125
	126	static int l_nonce2key(lua_State *L){
	127
d730878d	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);
2dcdf1a6	134
d730878d	135	const char *p_nr = luaL_checklstring(L, 3, &size);
d730878d	136	if(size != 4) return returnToLuaWithError(L,"Wrong size of nr, got %d bytes, expected 4", (int) size);
2dcdf1a6	137
d730878d	138	const char *p_par_info = luaL_checklstring(L, 4, &size);
d730878d	139	if(size != 8) return returnToLuaWithError(L,"Wrong size of par_info, got %d bytes, expected 8", (int) size);
2dcdf1a6	140
d730878d	141	const char *p_pks_info = luaL_checklstring(L, 5, &size);
d730878d	142	if(size != 8) return returnToLuaWithError(L,"Wrong size of ks_info, got %d bytes, expected 8", (int) size);
2dcdf1a6	143
2dcdf1a6	144
d730878d	145	uint32_t uid = bytes_to_num(( uint8_t *)p_uid,4);
d730878d	146	uint32_t nt = bytes_to_num(( uint8_t *)p_nt,4);
2dcdf1a6	147
d730878d	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);
2dcdf1a6	151
d730878d	152	uint64_t key = 0;
2dcdf1a6	153
d730878d	154	int retval = nonce2key(uid,nt, nr, par_info,ks_info, &key);
2dcdf1a6	155
d730878d	156	//Push the retval on the stack
d730878d	157	lua_pushinteger(L,retval);
2dcdf1a6	158
d730878d	159	//Push the key onto the stack
	160	uint8_t dest_key[8];
	161	num_to_bytes(key,sizeof(dest_key),dest_key);
b9697139	162
d730878d	163	//printf("Pushing to lua stack: %012"llx"\n",key);
d730878d	164	lua_pushlstring(L,(const char *) dest_key,sizeof(dest_key));
2dcdf1a6	165
d730878d	166	return 2; //Two return values
2dcdf1a6	167	}
42daa759	168	//static int l_PrintAndLog(lua_State *L){ return CmdHF14AMfDump(luaL_checkstring(L, 1));}
44fffc54	169	static int l_clearCommandBuffer(lua_State *L){
d730878d	170	clearCommandBuffer();
d730878d	171	return 0;
44fffc54	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	{
d730878d	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;
44fffc54	197	}
44fffc54	198
2dcdf1a6	199
44fffc54	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	{
d730878d	207	lua_pushboolean(L,ukbhit() ? true : false);
d730878d	208	return 1;
44fffc54	209	}
0a85b725	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	{
d730878d	218	CommandReceived((char *)luaL_checkstring(L, 1));
d730878d	219	return 0;
0a85b725	220	}
0a85b725	221
77cd612f	222	static int l_iso15693_crc(lua_State *L)
77cd612f	223	{
d730878d	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;
77cd612f	230	}
5b760b6c	231
be2d41b7	232	static int l_iso14443b_crc(lua_State *L)
	233	{
	234	/* void ComputeCrc14443(int CrcType,
	235	const unsigned char *Data, int Length,
	236	unsigned char *TransmitFirst,
	237	unsigned char *TransmitSecond)
	238	*/
	239	unsigned char buf[USB_CMD_DATA_SIZE];
	240	size_t len = 0;
	241	const char *data = luaL_checklstring(L, 1, &len);
	242	if (USB_CMD_DATA_SIZE < len)
	243	len = USB_CMD_DATA_SIZE-2;
	244
	245	for (int i = 0; i < len; i += 2) {
	246	sscanf(&data[i], "%02x", (unsigned int *)&buf[i / 2]);
	247	}
	248	ComputeCrc14443(CRC_14443_B, buf, len, &buf[len], &buf[len+1]);
	249
	250	lua_pushlstring(L, (const char *)&buf, len+2);
	251	return 1;
	252	}
b915fda3	253	/*
	254	Simple AES 128 cbc hook up to OpenSSL.
	255	params: key, input
	256	*/
1c4c0b06	257	static int l_aes128decrypt_cbc(lua_State *L)
b915fda3	258	{
	259	//Check number of arguments
	260	int i;
d730878d	261	size_t size;
	262	const char *p_key = luaL_checklstring(L, 1, &size);
	263	if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
	264
	265	const char *p_encTxt = luaL_checklstring(L, 2, &size);
b915fda3	266
1f6417a9 MHS	267	unsigned char indata[16] = {0x00};
1f6417a9 MHS	268	unsigned char outdata[16] = {0x00};
d730878d	269	unsigned char aes_key[16] = {0x00};
1f6417a9	270	unsigned char iv[16] = {0x00};
d730878d	271
d730878d	272	// convert key to bytearray and convert input to bytearray
b915fda3	273	for (i = 0; i < 32; i += 2) {
b915fda3	274	sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
d730878d	275	sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
b915fda3	276	}
d730878d	277
	278	aes_context ctx;
	279	aes_init(&ctx);
	280	aes_setkey_dec(&ctx, aes_key, 128);
	281	aes_crypt_cbc(&ctx,AES_DECRYPT,sizeof(indata), iv, indata,outdata );
	282	//Push decrypted array as a string
	283	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	284	return 1;// return 1 to signal one return value
	285	}
1c4c0b06	286	static int l_aes128decrypt_ecb(lua_State *L)
	287	{
	288	//Check number of arguments
	289	int i;
	290	size_t size;
	291	const char *p_key = luaL_checklstring(L, 1, &size);
	292	if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
	293
	294	const char *p_encTxt = luaL_checklstring(L, 2, &size);
	295
	296	unsigned char indata[16] = {0x00};
	297	unsigned char outdata[16] = {0x00};
	298	unsigned char aes_key[16] = {0x00};
	299
	300	// convert key to bytearray and convert input to bytearray
	301	for (i = 0; i < 32; i += 2) {
	302	sscanf(&p_encTxt[i], "%02x", (unsigned int *)&indata[i / 2]);
	303	sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
	304	}
	305	aes_context ctx;
	306	aes_init(&ctx);
	307	aes_setkey_dec(&ctx, aes_key, 128);
	308	aes_crypt_ecb(&ctx, AES_DECRYPT, indata, outdata );
	309
	310	//Push decrypted array as a string
	311	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	312	return 1;// return 1 to signal one return value
	313	}
	314
	315	static int l_aes128encrypt_cbc(lua_State *L)
d730878d	316	{
	317	//Check number of arguments
	318	int i;
	319	size_t size;
	320	const char *p_key = luaL_checklstring(L, 1, &size);
	321	if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
	322
	323	const char *p_txt = luaL_checklstring(L, 2, &size);
	324
	325	unsigned char indata[16] = {0x00};
	326	unsigned char outdata[16] = {0x00};
	327	unsigned char aes_key[16] = {0x00};
	328	unsigned char iv[16] = {0x00};
b915fda3	329
b915fda3	330	for (i = 0; i < 32; i += 2) {
d730878d	331	sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
b915fda3	332	sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
b915fda3	333	}
1f6417a9	334
d730878d	335	aes_context ctx;
	336	aes_init(&ctx);
	337	aes_setkey_enc(&ctx, aes_key, 128);
	338	aes_crypt_cbc(&ctx, AES_ENCRYPT, sizeof(indata), iv, indata, outdata );
	339	//Push encrypted array as a string
b915fda3	340	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	341	return 1;// return 1 to signal one return value
	342	}
	343
1c4c0b06	344	static int l_aes128encrypt_ecb(lua_State *L)
	345	{
	346	//Check number of arguments
	347	int i;
	348	size_t size;
	349	const char *p_key = luaL_checklstring(L, 1, &size);
	350	if(size != 32) return returnToLuaWithError(L,"Wrong size of key, got %d bytes, expected 32", (int) size);
	351
	352	const char *p_txt = luaL_checklstring(L, 2, &size);
	353
	354	unsigned char indata[16] = {0x00};
	355	unsigned char outdata[16] = {0x00};
	356	unsigned char aes_key[16] = {0x00};
	357
	358	for (i = 0; i < 32; i += 2) {
	359	sscanf(&p_txt[i], "%02x", (unsigned int *)&indata[i / 2]);
	360	sscanf(&p_key[i], "%02x", (unsigned int *)&aes_key[i / 2]);
	361	}
	362	aes_context ctx;
	363	aes_init(&ctx);
	364	aes_setkey_enc(&ctx, aes_key, 128);
	365	aes_crypt_ecb(&ctx, AES_ENCRYPT, indata, outdata );
	366	//Push encrypted array as a string
	367	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	368	return 1;// return 1 to signal one return value
	369	}
	370
b915fda3	371	static int l_crc16(lua_State *L)
	372	{
	373	size_t size;
	374	const char *p_str = luaL_checklstring(L, 1, &size);
d730878d	375
b915fda3	376	uint16_t retval = crc16_ccitt( (uint8_t*) p_str, size);
d730878d	377	lua_pushinteger(L, (int) retval);
	378	return 1;
	379	}
	380
	381	static int l_crc64(lua_State *L)
	382	{
	383	size_t size;
	384	uint64_t crc = 0;
	385	unsigned char outdata[8] = {0x00};
	386
	387	const char *p_str = luaL_checklstring(L, 1, &size);
	388
	389	crc64( (uint8_t*) p_str, size, &crc);
	390
	391	outdata[0] = (uint8_t)(crc >> 56) & 0xff;
	392	outdata[1] = (uint8_t)(crc >> 48) & 0xff;
	393	outdata[2] = (uint8_t)(crc >> 40) & 0xff;
	394	outdata[3] = (uint8_t)(crc >> 32) & 0xff;
	395	outdata[4] = (uint8_t)(crc >> 24) & 0xff;
	396	outdata[5] = (uint8_t)(crc >> 16) & 0xff;
	397	outdata[6] = (uint8_t)(crc >> 8) & 0xff;
	398	outdata[7] = crc & 0xff;
	399	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	400	return 1;
b915fda3	401	}
b915fda3	402
1c4c0b06	403	static int l_sha1(lua_State *L)
	404	{
	405	size_t size;
	406	const char *p_str = luaL_checklstring(L, 1, &size);
	407	unsigned char outdata[20] = {0x00};
	408	sha1( (uint8_t*) p_str, size, outdata);
	409	lua_pushlstring(L,(const char *)&outdata, sizeof(outdata));
	410	return 1;
	411	}
	412
686f0a17	413	/**
	414	* @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
	415	* able to do "require('foobar')" if foobar.lua is within lualibs folder.
	416	* Taken from http://stackoverflow.com/questions/4125971/setting-the-global-lua-path-variable-from-c-c
	417	* @param L
	418	* @param path
	419	* @return
	420	*/
	421	int setLuaPath( lua_State* L, const char* path )
	422	{
d730878d	423	lua_getglobal( L, "package" );
	424	lua_getfield( L, -1, "path" ); // get field "path" from table at top of stack (-1)
	425	const char* cur_path = lua_tostring( L, -1 ); // grab path string from top of stack
	426	int requiredLength = strlen(cur_path)+ strlen(path)+10; //A few bytes too many, whatever we can afford it
	427	char * buf = malloc(requiredLength);
	428	snprintf(buf, requiredLength, "%s;%s", cur_path, path);
	429	lua_pop( L, 1 ); // get rid of the string on the stack we just pushed on line 5
	430	lua_pushstring( L, buf ); // push the new one
	431	lua_setfield( L, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
	432	lua_pop( L, 1 ); // get rid of package table from top of stack
	433	free(buf);
	434	return 0; // all done!
686f0a17	435	}
	436
	437
f057bddb	438	int set_pm3_libraries(lua_State *L)
5b760b6c	439	{
686f0a17	440
d730878d	441	static const luaL_Reg libs[] = {
	442	{"SendCommand", l_SendCommand},
	443	{"WaitForResponseTimeout", l_WaitForResponseTimeout},
	444	{"nonce2key", l_nonce2key},
	445	//{"PrintAndLog", l_PrintAndLog},
	446	{"foobar", l_foobar},
	447	{"ukbhit", l_ukbhit},
	448	{"clearCommandBuffer", l_clearCommandBuffer},
	449	{"console", l_CmdConsole},
	450	{"iso15693_crc", l_iso15693_crc},
be2d41b7	451	{"iso14443b_crc", l_iso14443b_crc},
1c4c0b06	452	{"aes128_decrypt", l_aes128decrypt_cbc},
	453	{"aes128_decrypt_ecb", l_aes128decrypt_ecb},
	454	{"aes128_encrypt", l_aes128encrypt_cbc},
	455	{"aes128_encrypt_ecb", l_aes128encrypt_ecb},
b915fda3	456	{"crc16", l_crc16},
d730878d	457	{"crc64", l_crc64},
1c4c0b06	458	{"sha1", l_sha1},
d730878d	459	{NULL, NULL}
	460	};
	461
	462	lua_pushglobaltable(L);
	463	// Core library is in this table. Contains '
	464	//this is 'pm3' table
	465	lua_newtable(L);
	466
	467	//Put the function into the hash table.
	468	for (int i = 0; libs[i].name; i++) {
	469	lua_pushcfunction(L, libs[i].func);
	470	lua_setfield(L, -2, libs[i].name);//set the name, pop stack
	471	}
	472	//Name of 'core'
	473	lua_setfield(L, -2, "core");
	474
	475	//-- remove the global environment table from the stack
	476	lua_pop(L, 1);
	477
	478	//-- Last but not least, add to the LUA_PATH (package.path in lua)
	479	// so we can load libraries from the ./lualib/ - directory
	480	setLuaPath(L,"./lualibs/?.lua");
	481
	482	return 1;
5b760b6c	483	}