[proxmark3-svn] / client / util.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// 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.
//-----------------------------------------------------------------------------
// utilities
//-----------------------------------------------------------------------------

#include "util.h"
#define MAX_BIN_BREAK_LENGTH   (3072+384+1)

#ifndef _WIN32
#include <termios.h>
#include <sys/ioctl.h> 

int ukbhit(void)
{
  int cnt = 0;
  int error;
  static struct termios Otty, Ntty;

  if ( tcgetattr( 0, &Otty) == -1) return -1;
  Ntty = Otty;

  Ntty.c_iflag		= 0;       /* input mode                */
  Ntty.c_oflag		= 0;       /* output mode               */
  Ntty.c_lflag		&= ~ICANON; /* raw mode */
  Ntty.c_cc[VMIN]	= CMIN;    /* minimum time to wait      */
  Ntty.c_cc[VTIME]	= CTIME;   /* minimum characters to wait for */

  if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
    error += ioctl(0, FIONREAD, &cnt);
    error += tcsetattr(0, TCSANOW, &Otty);
  }

  return ( error == 0 ? cnt : -1 );
}

#else
#include <conio.h>
int ukbhit(void) {
	return kbhit();
}
#endif

// log files functions
void AddLogLine(char *file, char *extData, char *c) {
	FILE *fLog = NULL;
    char filename[FILE_PATH_SIZE] = {0x00};
    int len = 0;

    len = strlen(file);
    if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
    memcpy(filename, file, len);
   
	fLog = fopen(filename, "a");
	if (!fLog) {
		printf("Could not append log file %s", filename);
		return;
	}

	fprintf(fLog, "%s", extData);
	fprintf(fLog, "%s\n", c);
	fclose(fLog);
}

void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
	AddLogLine(fileName, extData, sprint_hex(data, len));
}

void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
  char buf[100] = {0};
	sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
	AddLogLine(fileName, extData, buf);
}

void AddLogCurrentDT(char *fileName) {
	char buff[20];
	struct tm *curTime;

	time_t now = time(0);
	curTime = gmtime(&now);

	strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
	AddLogLine(fileName, "\nanticollision: ", buff);
}

void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
	char * fnameptr = fileName;
	memset(fileName, 0x00, 200);
	
	for (int j = 0; j < byteCount; j++, fnameptr += 2)
		sprintf(fnameptr, "%02x", uid[j]); 
	sprintf(fnameptr, "%s", ext); 
}

// printing and converting functions
void print_hex(const uint8_t * data, const size_t len) {
	size_t i;
	for (i=0; i < len; ++i)
		printf("%02x ", data[i]);
	printf("\n");
}
void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {

	int rownum = 0;
	printf("[%02d] | ", rownum);
	for (int i = 0; i < len; ++i) {

		printf("%02X ", data[i]);
		
		// check if a line break is needed
		if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
			++rownum;
			printf("\n[%02d] | ", rownum);
		}
	}
	printf("\n");
}

char *sprint_hex(const uint8_t *data, const size_t len) {
	
	int maxLen = ( len > 1024/3) ? 1024/3 : len;
	static char buf[1024];
	memset(buf, 0x00, 1024);
	char * tmp = buf;
	size_t i;

	for (i=0; i < maxLen; ++i, tmp += 3)
		sprintf(tmp, "%02X ", data[i]);

	return buf;
}

char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
	// make sure we don't go beyond our char array memory
	int max_len;
	if (breaks==0)
		max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
	else
		max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);

	static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
	//clear memory
	memset(buf, 0x00, sizeof(buf));
	char *tmp = buf;

	size_t in_index = 0;
	// loop through the out_index to make sure we don't go too far
	for (size_t out_index=0; out_index < max_len-2; out_index++) {
		// set character
		sprintf(tmp++, "%u", (unsigned int) data[in_index]);
		// check if a line break is needed and we have room to print it in our array
		if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
			// increment and print line break
			out_index++;
			sprintf(tmp++, "%s","\n");
	}
		in_index++;
	}

	return buf;
}

char *sprint_bin(const uint8_t *data, const size_t len) {
	return sprint_bin_break(data, len, 0);
}

char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
	static char buf[1024];
	char *tmp = buf;
	memset(buf, 0x00, 1024);
	size_t max_len = (len > 1010) ? 1010 : len;
	sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);	
	return buf;
}
void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
{
	while (len--) {
		dest[len] = (uint8_t) n;
		n >>= 8;
	}
}

uint64_t bytes_to_num(uint8_t* src, size_t len)
{
	uint64_t num = 0;
	while (len--)
	{
		num = (num << 8) | (*src);
		src++;
	}
	return num;
}

void num_to_bytebits(uint64_t	n, size_t len, uint8_t *dest) {
	while (len--) {
		dest[len] = n & 1;
		n >>= 1;
	}
}

// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
// to
// hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
// up to 64 bytes or 512 bits
uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
	uint8_t buf[64];
	memset(buf, 0x00, 64);
	uint8_t *tmp = buf;
	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
		for (size_t i = 0; i < blockSize; i++){
			tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
		}
	}
	return tmp;
}

void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
		for (size_t i = 0; i < blockSize; i++){
			dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
		}
	}
}


//  -------------------------------------------------------------------------
//  string parameters lib
//  -------------------------------------------------------------------------

//  -------------------------------------------------------------------------
//  line     - param line
//  bg, en   - symbol numbers in param line of beginning an ending parameter
//  paramnum - param number (from 0)
//  -------------------------------------------------------------------------
int param_getptr(const char *line, int *bg, int *en, int paramnum)
{
	int i;
	int len = strlen(line);
	
	*bg = 0;
	*en = 0;
	
  // skip spaces
	while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
	if (*bg >= len) {
		return 1;
	}

	for (i = 0; i < paramnum; i++) {
		while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
		while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
		
		if (line[*bg] == '\0') return 1;
	}
	
	*en = *bg;
	while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
	
	(*en)--;

	return 0;
}


char param_getchar(const char *line, int paramnum)
{
	int bg, en;
	
	if (param_getptr(line, &bg, &en, paramnum)) return 0x00;

	return line[bg];
}

uint8_t param_get8(const char *line, int paramnum)
{
	return param_get8ex(line, paramnum, 0, 10);
}

/**
 * @brief Reads a decimal integer (actually, 0-254, not 255)
 * @param line
 * @param paramnum
 * @return -1 if error
 */
uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
{
	uint8_t val =  param_get8ex(line, paramnum, 255, 10);
	if( (int8_t) val == -1) return 1;
	(*destination) = val;
	return 0;
}
/**
 * @brief Checks if param is decimal
 * @param line
 * @param paramnum
 * @return
 */
uint8_t param_isdec(const char *line, int paramnum)
{
	int bg, en;
	//TODO, check more thorougly
	if (!param_getptr(line, &bg, &en, paramnum)) return 1;
		//		return strtoul(&line[bg], NULL, 10) & 0xff;

	return 0;
}

uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
{
	int bg, en;

	if (!param_getptr(line, &bg, &en, paramnum)) 
		return strtoul(&line[bg], NULL, base) & 0xff;
	else
		return deflt;
}

uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
{
	int bg, en;

	if (!param_getptr(line, &bg, &en, paramnum)) 
		return strtoul(&line[bg], NULL, base);
	else
		return deflt;
}

uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
{
	int bg, en;

	if (!param_getptr(line, &bg, &en, paramnum)) 
		return strtoull(&line[bg], NULL, base);
	else
		return deflt;

	return 0;
}

int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
{
	int bg, en, temp, i;

	if (hexcnt & 1) return 1;
	
	if (param_getptr(line, &bg, &en, paramnum)) return 1;

	if (en - bg + 1 != hexcnt) return 1;

	for(i = 0; i < hexcnt; i += 2) {
		if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )	return 1;
		
		sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
		data[i / 2] = temp & 0xff;
	}	

	return 0;
}
int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
{
	int bg, en, temp, i;

	//if (hexcnt % 2)
	//	return 1;
	
	if (param_getptr(line, &bg, &en, paramnum)) return 1;

	*hexcnt = en - bg + 1;
	if (*hexcnt % 2) //error if not complete hex bytes
		return 1;

	for(i = 0; i < *hexcnt; i += 2) {
		if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
		
		sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
		data[i / 2] = temp & 0xff;
	}	

	return 0;
}
int param_getstr(const char *line, int paramnum, char * str)
{
	int bg, en;

	if (param_getptr(line, &bg, &en, paramnum)) return 0;
	
	memcpy(str, line + bg, en - bg + 1);
	str[en - bg + 1] = 0;
	
	return en - bg + 1;
}

/*
The following methods comes from Rfidler sourcecode.
https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
*/

// convert hex to sequence of 0/1 bit values
// returns number of bits converted
int hextobinarray(char *target, char *source)
{
    int length, i, count= 0;
    char x;

    length = strlen(source);
    // process 4 bits (1 hex digit) at a time
    while(length--)
    {
        x= *(source++);
        // capitalize
        if (x >= 'a' && x <= 'f')
            x -= 32;
        // convert to numeric value
        if (x >= '0' && x <= '9')
            x -= '0';
        else if (x >= 'A' && x <= 'F')
            x -= 'A' - 10;
        else
            return 0;
        // output
        for(i= 0 ; i < 4 ; ++i, ++count)
            *(target++)= (x >> (3 - i)) & 1;
    }
    
    return count;
}

// convert hex to human readable binary string
int hextobinstring(char *target, char *source)
{
    int length;

    if(!(length= hextobinarray(target, source)))
        return 0;
    binarraytobinstring(target, target, length);
    return length;
}

// convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
// return number of bits converted
int binarraytohex(char *target, char *source, int length)
{
    unsigned char i, x;
    int j = length;

    if(j % 4)
        return 0;

    while(j)
    {
        for(i= x= 0 ; i < 4 ; ++i)
            x +=  ( source[i] << (3 - i));
        sprintf(target,"%X", x);
        ++target;
        source += 4;
        j -= 4;
    }
    return length;
}

// convert binary array to human readable binary
void binarraytobinstring(char *target, char *source,  int length)
{
    int i;

    for(i= 0 ; i < length ; ++i)
        *(target++)= *(source++) + '0';
    *target= '\0';
}

// return parity bit required to match type
uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
{
    int x;
    for( x = 0 ; length > 0 ; --length)
        x += bits[length - 1];
    x %= 2;
    return x ^ type;
}

// add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
{
    *(target++)= GetParity(source, EVEN, length / 2);
    memcpy(target, source, length);
    target += length;
    *(target)= GetParity(source + length / 2, ODD, length / 2);
}

void xor(unsigned char * dst, unsigned char * src, size_t len) {
   for( ; len > 0; len--,dst++,src++)
       *dst ^= *src;
}

int32_t le24toh (uint8_t data[3]) {
    return (data[2] << 16) | (data[1] << 8) | data[0];
}

uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {

	if (len > 32) return 0;
	
	int i = start;
	int j = len-1;
	uint32_t tmp = 0;

	for (; j >= 0; --j, ++i)
		tmp	|= bits[i] << j;

	return tmp;
}

// RotateLeft - Ultralight, Desfire, works on byte level
// 00-01-02  >> 01-02-00
void rol(uint8_t *data, const size_t len){	
    uint8_t first = data[0];
    for (size_t i = 0; i < len-1; i++) {
        data[i] = data[i+1];
    }
    data[len-1] = first;
}

uint32_t SwapBits(uint32_t value, int nrbits) {
	uint32_t newvalue = 0;
	for(int i = 0; i < nrbits; i++) {
		newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
	}
	return newvalue;
}
Commit	Line	Data
20f9a2a1 M	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
	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	// utilities
	9	//-----------------------------------------------------------------------------
	10
	11	#include "util.h"
bf32dd92	12	#define MAX_BIN_BREAK_LENGTH (3072+384+1)
534983d7	13
cb64309e	14	#ifndef _WIN32
873014de M	15	#include <termios.h>
873014de M	16	#include <sys/ioctl.h>
79544b28	17
f397b5cc M	18	int ukbhit(void)
	19	{
	20	int cnt = 0;
	21	int error;
	22	static struct termios Otty, Ntty;
	23
d04b71c1	24	if ( tcgetattr( 0, &Otty) == -1) return -1;
f397b5cc M	25	Ntty = Otty;
f397b5cc M	26
d04b71c1	27	Ntty.c_iflag = 0; /* input mode */
	28	Ntty.c_oflag = 0; /* output mode */
	29	Ntty.c_lflag &= ~ICANON; /* raw mode */
	30	Ntty.c_cc[VMIN] = CMIN; /* minimum time to wait */
	31	Ntty.c_cc[VTIME] = CTIME; /* minimum characters to wait for */
f397b5cc M	32
	33	if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
	34	error += ioctl(0, FIONREAD, &cnt);
	35	error += tcsetattr(0, TCSANOW, &Otty);
	36	}
	37
	38	return ( error == 0 ? cnt : -1 );
	39	}
	40
	41	#else
	42	#include <conio.h>
	43	int ukbhit(void) {
	44	return kbhit();
	45	}
	46	#endif
	47
55acbb2a	48	// log files functions
b915fda3	49	void AddLogLine(char file, char extData, char *c) {
55acbb2a	50	FILE *fLog = NULL;
b915fda3	51	char filename[FILE_PATH_SIZE] = {0x00};
	52	int len = 0;
	53
	54	len = strlen(file);
	55	if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
	56	memcpy(filename, file, len);
	57
	58	fLog = fopen(filename, "a");
55acbb2a	59	if (!fLog) {
b915fda3	60	printf("Could not append log file %s", filename);
55acbb2a M	61	return;
	62	}
	63
	64	fprintf(fLog, "%s", extData);
	65	fprintf(fLog, "%s\n", c);
	66	fclose(fLog);
	67	}
	68
	69	void AddLogHex(char fileName, char extData, const uint8_t * data, const size_t len){
	70	AddLogLine(fileName, extData, sprint_hex(data, len));
	71	}
	72
	73	void AddLogUint64(char fileName, char extData, const uint64_t data) {
	74	char buf[100] = {0};
	75	sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
	76	AddLogLine(fileName, extData, buf);
	77	}
	78
	79	void AddLogCurrentDT(char *fileName) {
	80	char buff[20];
	81	struct tm *curTime;
	82
	83	time_t now = time(0);
	84	curTime = gmtime(&now);
	85
	86	strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
	87	AddLogLine(fileName, "\nanticollision: ", buff);
	88	}
	89
e0c635d1	90	void FillFileNameByUID(char fileName, uint8_t uid, char *ext, int byteCount) {
55acbb2a M	91	char * fnameptr = fileName;
	92	memset(fileName, 0x00, 200);
	93
e0c635d1	94	for (int j = 0; j < byteCount; j++, fnameptr += 2)
55acbb2a M	95	sprintf(fnameptr, "%02x", uid[j]);
55acbb2a M	96	sprintf(fnameptr, "%s", ext);
55acbb2a M	97	}
	98
	99	// printing and converting functions
9827020a	100	void print_hex(const uint8_t * data, const size_t len) {
534983d7	101	size_t i;
9827020a	102	for (i=0; i < len; ++i)
534983d7	103	printf("%02x ", data[i]);
9827020a	104	printf("\n");
	105	}
	106	void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
a1689f41	107
	108	int rownum = 0;
	109	printf("[%02d] \| ", rownum);
	110	for (int i = 0; i < len; ++i) {
534983d7	111
9827020a	112	printf("%02X ", data[i]);
	113
	114	// check if a line break is needed
a1689f41	115	if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
	116	++rownum;
	117	printf("\n[%02d] \| ", rownum);
	118	}
9827020a	119	}
534983d7	120	printf("\n");
	121	}
	122
334cc089	123	char sprint_hex(const uint8_t data, const size_t len) {
b915fda3	124
b915fda3	125	int maxLen = ( len > 1024/3) ? 1024/3 : len;
534983d7	126	static char buf[1024];
334cc089	127	memset(buf, 0x00, 1024);
534983d7	128	char * tmp = buf;
	129	size_t i;
	130
b915fda3	131	for (i=0; i < maxLen; ++i, tmp += 3)
334cc089	132	sprintf(tmp, "%02X ", data[i]);
534983d7	133
	134	return buf;
	135	}
f89c7050	136
2767fc02	137	char sprint_bin_break(const uint8_t data, const size_t len, const uint8_t breaks) {
bf32dd92	138	// make sure we don't go beyond our char array memory
0c97a456	139	int max_len;
	140	if (breaks==0)
	141	max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
	142	else
	143	max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
	144
bf32dd92	145	static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
	146	//clear memory
	147	memset(buf, 0x00, sizeof(buf));
2767fc02	148	char *tmp = buf;
79544b28	149
bf32dd92	150	size_t in_index = 0;
bf32dd92	151	// loop through the out_index to make sure we don't go too far
ab7bb494	152	for (size_t out_index=0; out_index < max_len-2; out_index++) {
bf32dd92	153	// set character
05164399	154	sprintf(tmp++, "%u", (unsigned int) data[in_index]);
9332b857	155	// check if a line break is needed and we have room to print it in our array
bf32dd92	156	if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
	157	// increment and print line break
	158	out_index++;
2767fc02	159	sprintf(tmp++, "%s","\n");
2767fc02	160	}
bf32dd92	161	in_index++;
bf32dd92	162	}
79544b28	163
	164	return buf;
	165	}
	166
2767fc02	167	char sprint_bin(const uint8_t data, const size_t len) {
	168	return sprint_bin_break(data, len, 0);
	169	}
0c97a456	170
	171	char sprint_hex_ascii(const uint8_t data, const size_t len) {
	172	static char buf[1024];
508b37ba	173	char *tmp = buf;
9827020a	174	memset(buf, 0x00, 1024);
	175	size_t max_len = (len > 1010) ? 1010 : len;
	176	sprintf(tmp, "%s\| %s", sprint_hex(data, max_len) , data);
0c97a456	177	return buf;
0c97a456	178	}
f89c7050 M	179	void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
	180	{
	181	while (len--) {
	182	dest[len] = (uint8_t) n;
	183	n >>= 8;
	184	}
	185	}
	186
	187	uint64_t bytes_to_num(uint8_t* src, size_t len)
	188	{
	189	uint64_t num = 0;
	190	while (len--)
	191	{
	192	num = (num << 8) \| (*src);
	193	src++;
	194	}
	195	return num;
	196	}
f397b5cc	197
a126332a	198	void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
	199	while (len--) {
	200	dest[len] = n & 1;
	201	n >>= 1;
	202	}
	203	}
	204
e1c88b09	205	// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
	206	// to
	207	// hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
	208	// up to 64 bytes or 512 bits
224e8c1a	209	uint8_t SwapEndian64(const uint8_t src, const size_t len, const uint8_t blockSize){
f4d0ffd1	210	uint8_t buf[64];
224e8c1a	211	memset(buf, 0x00, 64);
	212	uint8_t *tmp = buf;
	213	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
	214	for (size_t i = 0; i < blockSize; i++){
	215	tmp[i+(blockSizeblock)] = src[(blockSize-1-i)+(blockSizeblock)];
e1c88b09	216	}
e1c88b09	217	}
224e8c1a	218	return tmp;
e1c88b09	219	}
e1c88b09	220
f4d0ffd1	221	void SwapEndian64ex(const uint8_t src, const size_t len, const uint8_t blockSize, uint8_t dest){
	222	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
	223	for (size_t i = 0; i < blockSize; i++){
	224	dest[i+(blockSizeblock)] = src[(blockSize-1-i)+(blockSizeblock)];
	225	}
	226	}
	227	}
	228
	229
9ca155ba M	230	// -------------------------------------------------------------------------
	231	// string parameters lib
	232	// -------------------------------------------------------------------------
	233
f397b5cc M	234	// -------------------------------------------------------------------------
	235	// line - param line
	236	// bg, en - symbol numbers in param line of beginning an ending parameter
	237	// paramnum - param number (from 0)
	238	// -------------------------------------------------------------------------
	239	int param_getptr(const char line, int bg, int *en, int paramnum)
	240	{
	241	int i;
	242	int len = strlen(line);
	243
	244	*bg = 0;
	245	*en = 0;
	246
	247	// skip spaces
	248	while (line[bg] ==' ' \|\| line[bg]=='\t') (*bg)++;
	249	if (*bg >= len) {
	250	return 1;
	251	}
	252
	253	for (i = 0; i < paramnum; i++) {
	254	while (line[bg]!=' ' && line[bg]!='\t' && line[bg] != '\0') (bg)++;
	255	while (line[bg]==' ' \|\| line[bg]=='\t') (*bg)++;
	256
	257	if (line[*bg] == '\0') return 1;
	258	}
	259
	260	en = bg;
	261	while (line[en] != ' ' && line[en] != '\t' && line[en] != '\0') (en)++;
	262
	263	(*en)--;
	264
	265	return 0;
	266	}
	267
31abe49f	268
f397b5cc M	269	char param_getchar(const char *line, int paramnum)
	270	{
	271	int bg, en;
	272
	273	if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
	274
	275	return line[bg];
	276	}
	277
	278	uint8_t param_get8(const char *line, int paramnum)
	279	{
60e86577	280	return param_get8ex(line, paramnum, 0, 10);
f397b5cc M	281	}
f397b5cc M	282
f6d9fb17	283	/**
31abe49f	284	* @brief Reads a decimal integer (actually, 0-254, not 255)
f6d9fb17 MHS	285	* @param line
f6d9fb17 MHS	286	* @param paramnum
31abe49f	287	* @return -1 if error
f6d9fb17 MHS	288	*/
	289	uint8_t param_getdec(const char line, int paramnum, uint8_t destination)
	290	{
31abe49f	291	uint8_t val = param_get8ex(line, paramnum, 255, 10);
31abe49f	292	if( (int8_t) val == -1) return 1;
f6d9fb17 MHS	293	(*destination) = val;
	294	return 0;
	295	}
	296	/**
	297	* @brief Checks if param is decimal
	298	* @param line
	299	* @param paramnum
	300	* @return
	301	*/
	302	uint8_t param_isdec(const char *line, int paramnum)
	303	{
	304	int bg, en;
	305	//TODO, check more thorougly
	306	if (!param_getptr(line, &bg, &en, paramnum)) return 1;
	307	// return strtoul(&line[bg], NULL, 10) & 0xff;
	308
	309	return 0;
	310	}
	311
f397b5cc M	312	uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
	313	{
	314	int bg, en;
	315
	316	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	317	return strtoul(&line[bg], NULL, base) & 0xff;
f397b5cc M	318	else
	319	return deflt;
	320	}
	321
	322	uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
	323	{
	324	int bg, en;
	325
	326	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	327	return strtoul(&line[bg], NULL, base);
f397b5cc M	328	else
	329	return deflt;
	330	}
	331
	332	uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
	333	{
	334	int bg, en;
	335
	336	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	337	return strtoull(&line[bg], NULL, base);
f397b5cc M	338	else
	339	return deflt;
	340
	341	return 0;
	342	}
	343
	344	int param_gethex(const char line, int paramnum, uint8_t data, int hexcnt)
	345	{
	346	int bg, en, temp, i;
	347
508b37ba	348	if (hexcnt & 1) return 1;
f397b5cc M	349
	350	if (param_getptr(line, &bg, &en, paramnum)) return 1;
	351
508b37ba	352	if (en - bg + 1 != hexcnt) return 1;
f397b5cc M	353
	354	for(i = 0; i < hexcnt; i += 2) {
	355	if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
	356
	357	sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
	358	data[i / 2] = temp & 0xff;
	359	}
	360
	361	return 0;
	362	}
e98572a1	363	int param_gethex_ex(const char line, int paramnum, uint8_t data, int *hexcnt)
	364	{
	365	int bg, en, temp, i;
	366
	367	//if (hexcnt % 2)
	368	// return 1;
	369
	370	if (param_getptr(line, &bg, &en, paramnum)) return 1;
	371
	372	*hexcnt = en - bg + 1;
	373	if (*hexcnt % 2) //error if not complete hex bytes
	374	return 1;
aea4d766	375
e98572a1	376	for(i = 0; i < *hexcnt; i += 2) {
3bc7b13d	377	if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
e98572a1	378
	379	sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
	380	data[i / 2] = temp & 0xff;
	381	}
	382
	383	return 0;
	384	}
aea4d766	385	int param_getstr(const char line, int paramnum, char str)
	386	{
	387	int bg, en;
	388
	389	if (param_getptr(line, &bg, &en, paramnum)) return 0;
	390
	391	memcpy(str, line + bg, en - bg + 1);
	392	str[en - bg + 1] = 0;
	393
	394	return en - bg + 1;
	395	}
79544b28	396
	397	/*
	398	The following methods comes from Rfidler sourcecode.
	399	https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
	400	*/
	401
	402	// convert hex to sequence of 0/1 bit values
	403	// returns number of bits converted
	404	int hextobinarray(char target, char source)
	405	{
	406	int length, i, count= 0;
	407	char x;
	408
	409	length = strlen(source);
	410	// process 4 bits (1 hex digit) at a time
	411	while(length--)
	412	{
	413	x= *(source++);
	414	// capitalize
	415	if (x >= 'a' && x <= 'f')
	416	x -= 32;
	417	// convert to numeric value
	418	if (x >= '0' && x <= '9')
	419	x -= '0';
	420	else if (x >= 'A' && x <= 'F')
	421	x -= 'A' - 10;
	422	else
	423	return 0;
	424	// output
	425	for(i= 0 ; i < 4 ; ++i, ++count)
	426	*(target++)= (x >> (3 - i)) & 1;
	427	}
	428
	429	return count;
	430	}
	431
	432	// convert hex to human readable binary string
	433	int hextobinstring(char target, char source)
	434	{
	435	int length;
	436
	437	if(!(length= hextobinarray(target, source)))
	438	return 0;
	439	binarraytobinstring(target, target, length);
	440	return length;
	441	}
	442
	443	// convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
	444	// return number of bits converted
	445	int binarraytohex(char target, char source, int length)
	446	{
	447	unsigned char i, x;
	448	int j = length;
	449
	450	if(j % 4)
	451	return 0;
	452
	453	while(j)
	454	{
	455	for(i= x= 0 ; i < 4 ; ++i)
	456	x += ( source[i] << (3 - i));
	457	sprintf(target,"%X", x);
	458	++target;
	459	source += 4;
460	j -= 4;
461	}
462	return length;
463	}
464
465	// convert binary array to human readable binary
466	void binarraytobinstring(char target, char source, int length)
467	{
468	int i;
469
470	for(i= 0 ; i < length ; ++i)
471	(target++)= (source++) + '0';
472	*target= '\0';
473	}
474
475	// return parity bit required to match type
a126332a	476	uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
79544b28	477	{
79544b28	478	int x;
ab7bb494	479	for( x = 0 ; length > 0 ; --length)
79544b28	480	x += bits[length - 1];
79544b28	481	x %= 2;
79544b28	482	return x ^ type;
	483	}
	484
	485	// add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
a126332a	486	void wiegand_add_parity(uint8_t target, uint8_t source, uint8_t length)
79544b28	487	{
	488	*(target++)= GetParity(source, EVEN, length / 2);
	489	memcpy(target, source, length);
	490	target += length;
	491	*(target)= GetParity(source + length / 2, ODD, length / 2);
	492	}
c3c241f3	493
	494	void xor(unsigned char * dst, unsigned char * src, size_t len) {
	495	for( ; len > 0; len--,dst++,src++)
	496	dst ^= src;
	497	}
	498
	499	int32_t le24toh (uint8_t data[3]) {
	500	return (data[2] << 16) \| (data[1] << 8) \| data[0];
	501	}
ad6219fc	502
ad6219fc	503	uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
9984b173	504
9984b173	505	if (len > 32) return 0;
ad6219fc	506
	507	int i = start;
	508	int j = len-1;
ad6219fc	509	uint32_t tmp = 0;
9984b173	510
ad6219fc	511	for (; j >= 0; --j, ++i)
	512	tmp \|= bits[i] << j;
	513
	514	return tmp;
	515	}
9984b173	516
ab7bb494	517	// RotateLeft - Ultralight, Desfire, works on byte level
ab7bb494	518	// 00-01-02 >> 01-02-00
6bb7609c	519	void rol(uint8_t *data, const size_t len){
9984b173	520	uint8_t first = data[0];
	521	for (size_t i = 0; i < len-1; i++) {
	522	data[i] = data[i+1];
	523	}
	524	data[len-1] = first;
6bb7609c	525	}
	526
	527	uint32_t SwapBits(uint32_t value, int nrbits) {
	528	uint32_t newvalue = 0;
	529	for(int i = 0; i < nrbits; i++) {
	530	newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
	531	}
	532	return newvalue;
9984b173	533	}