[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 <sys/ttydefaults.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
int ukbhit(void) {
	return kbhit();
}
#endif

// log files functions
void AddLogLine(char *file, char *extData, char *c) {
	FILE *f = 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);
   
	f = fopen(filename, "a");
	if (!f) {
		printf("Could not append log file %s", filename);
		return;
	}

	fprintf(f, "%s", extData);
	fprintf(f, "%s\n", c);
	fflush(f);
	if (f) {
		fclose(f);
		f = NULL;
	}
}

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[20] = {0};
	memset(buf, 0x00, sizeof(buf));
	//sprintf(buf, "%X%X", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
	sprintf(buf, "%012"llx"", data);
	AddLogLine(fileName, extData, buf);
}

void AddLogCurrentDT(char *fileName) {
	char buf[20];
	memset(buf, 0x00, sizeof(buf));
	struct tm *curTime;
	time_t now = time(0);
	curTime = gmtime(&now);
	strftime (buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", curTime);
	AddLogLine(fileName, "\nanticollision: ", buf);
}

void FillFileNameByUID(char *fileName, uint8_t *uid, char *ext, int byteCount) {
	if ( fileName == NULL || uid == NULL || ext == NULL ){
		printf("error: parameter is NULL\n");
		return;
	}
	char * fnameptr = fileName;
	memset(fileName, 0x00, FILE_PATH_SIZE);
	
	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
	size_t in_index = 0, out_index = 0;
	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;

	// loop through the out_index to make sure we don't go too far
	for (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++;
	}
	// last char.
	sprintf(tmp++, "%u", (unsigned int) data[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] = n & 0xFF;
		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;
}

// takes a number (uint64_t) and creates a binarray in dest.
void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
	while (len--) {
		dest[len] = n & 1;
		n >>= 1;
	}
}

//least significant bit first
void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
	for(int i = 0 ; i < len ; ++i) {
		dest[i] =  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){
	static 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 buf;
}

// takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64), 
// returns: the dest array contains the reordered src array.
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;
}

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);
}

// xor two arrays together for len items.  The dst array contains the new xored values.
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 le32toh (uint8_t *data) {
	return (uint32_t)( (data[3]<<24) | (data[2]<<16) | (data[1]<<8) | data[0]);
}
// Pack a bitarray into a uint32_t.  
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;
}

// Swap bit order on a uint32_t value.  Can be limited by nrbits just use say 8bits reversal
// And clears the rest of the bits.
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;
}
/*
 ref  http://www.csm.ornl.gov/~dunigan/crc.html
 Returns the value v with the bottom b [0,32] bits reflected. 
 Example: reflect(0x3e23L,3) == 0x3e26
*/
uint32_t reflect(uint32_t v, int b) {
	uint32_t t = v;
	for ( int i = 0; i < b; ++i) {
		if (t & 1)
			v |=  BITMASK((b-1)-i);
		else
			v &= ~BITMASK((b-1)-i);
		t>>=1;
	}
	return v;
}

uint64_t HornerScheme(uint64_t num, uint64_t divider, uint64_t factor) {
   uint64_t remainder=0, quotient=0, result=0;
   remainder = num % divider;
   quotient = num / divider;
   if(!(quotient == 0 && remainder == 0))
   result += HornerScheme(quotient, divider, factor) * factor + remainder;
   return result;
}
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
faad338e MF	15	#include <sys/ttydefaults.h>
faad338e MF	16
3e134b4c	17	int ukbhit(void) {
f397b5cc M	18	int cnt = 0;
	19	int error;
	20	static struct termios Otty, Ntty;
	21
d04b71c1	22	if ( tcgetattr( 0, &Otty) == -1) return -1;
f397b5cc M	23	Ntty = Otty;
f397b5cc M	24
d04b71c1	25	Ntty.c_iflag = 0; /* input mode */
	26	Ntty.c_oflag = 0; /* output mode */
	27	Ntty.c_lflag &= ~ICANON; /* raw mode */
	28	Ntty.c_cc[VMIN] = CMIN; /* minimum time to wait */
	29	Ntty.c_cc[VTIME] = CTIME; /* minimum characters to wait for */
f397b5cc M	30
	31	if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
	32	error += ioctl(0, FIONREAD, &cnt);
	33	error += tcsetattr(0, TCSANOW, &Otty);
	34	}
	35
	36	return ( error == 0 ? cnt : -1 );
	37	}
	38
	39	#else
f397b5cc M	40	int ukbhit(void) {
	41	return kbhit();
	42	}
	43	#endif
	44
55acbb2a	45	// log files functions
b915fda3	46	void AddLogLine(char file, char extData, char *c) {
c805748f	47	FILE *f = NULL;
b915fda3	48	char filename[FILE_PATH_SIZE] = {0x00};
	49	int len = 0;
	50
	51	len = strlen(file);
	52	if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
	53	memcpy(filename, file, len);
	54
c805748f	55	f = fopen(filename, "a");
c805748f	56	if (!f) {
b915fda3	57	printf("Could not append log file %s", filename);
55acbb2a M	58	return;
	59	}
	60
c805748f	61	fprintf(f, "%s", extData);
	62	fprintf(f, "%s\n", c);
	63	fflush(f);
2dcf60f3	64	if (f) {
	65	fclose(f);
	66	f = NULL;
	67	}
55acbb2a M	68	}
	69
	70	void AddLogHex(char fileName, char extData, const uint8_t * data, const size_t len){
	71	AddLogLine(fileName, extData, sprint_hex(data, len));
	72	}
	73
	74	void AddLogUint64(char fileName, char extData, const uint64_t data) {
c805748f	75	char buf[20] = {0};
	76	memset(buf, 0x00, sizeof(buf));
	77	//sprintf(buf, "%X%X", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
	78	sprintf(buf, "%012"llx"", data);
55acbb2a M	79	AddLogLine(fileName, extData, buf);
	80	}
	81
	82	void AddLogCurrentDT(char *fileName) {
c805748f	83	char buf[20];
c805748f	84	memset(buf, 0x00, sizeof(buf));
55acbb2a	85	struct tm *curTime;
55acbb2a M	86	time_t now = time(0);
55acbb2a M	87	curTime = gmtime(&now);
c805748f	88	strftime (buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", curTime);
c805748f	89	AddLogLine(fileName, "\nanticollision: ", buf);
55acbb2a M	90	}
55acbb2a M	91
c805748f	92	void FillFileNameByUID(char fileName, uint8_t uid, char *ext, int byteCount) {
	93	if ( fileName == NULL \|\| uid == NULL \|\| ext == NULL ){
	94	printf("error: parameter is NULL\n");
	95	return;
	96	}
55acbb2a	97	char * fnameptr = fileName;
c805748f	98	memset(fileName, 0x00, FILE_PATH_SIZE);
55acbb2a	99
e0c635d1	100	for (int j = 0; j < byteCount; j++, fnameptr += 2)
c805748f	101	sprintf(fnameptr, "%02X", uid[j]);
55acbb2a	102	sprintf(fnameptr, "%s", ext);
55acbb2a M	103	}
	104
	105	// printing and converting functions
9827020a	106	void print_hex(const uint8_t * data, const size_t len) {
534983d7	107	size_t i;
9827020a	108	for (i=0; i < len; ++i)
534983d7	109	printf("%02x ", data[i]);
9827020a	110	printf("\n");
9827020a	111	}
0d2c5909	112
9827020a	113	void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
a1689f41	114
	115	int rownum = 0;
	116	printf("[%02d] \| ", rownum);
	117	for (int i = 0; i < len; ++i) {
534983d7	118
9827020a	119	printf("%02X ", data[i]);
	120
	121	// check if a line break is needed
a1689f41	122	if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
	123	++rownum;
	124	printf("\n[%02d] \| ", rownum);
	125	}
9827020a	126	}
534983d7	127	printf("\n");
	128	}
	129
334cc089	130	char sprint_hex(const uint8_t data, const size_t len) {
b915fda3	131
b915fda3	132	int maxLen = ( len > 1024/3) ? 1024/3 : len;
534983d7	133	static char buf[1024];
334cc089	134	memset(buf, 0x00, 1024);
534983d7	135	char * tmp = buf;
	136	size_t i;
	137
b915fda3	138	for (i=0; i < maxLen; ++i, tmp += 3)
334cc089	139	sprintf(tmp, "%02X ", data[i]);
534983d7	140	return buf;
534983d7	141	}
f89c7050	142
2767fc02	143	char sprint_bin_break(const uint8_t data, const size_t len, const uint8_t breaks) {
581b31fb	144
bf32dd92	145	// make sure we don't go beyond our char array memory
581b31fb	146	size_t in_index = 0, out_index = 0;
581b31fb	147	int max_len;
0c97a456	148	if (breaks==0)
	149	max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
	150	else
	151	max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
	152
bf32dd92	153	static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
	154	//clear memory
	155	memset(buf, 0x00, sizeof(buf));
2767fc02	156	char *tmp = buf;
79544b28	157
bf32dd92	158	// loop through the out_index to make sure we don't go too far
581b31fb	159	for (out_index=0; out_index < max_len-2; out_index++) {
bf32dd92	160	// set character
05164399	161	sprintf(tmp++, "%u", (unsigned int) data[in_index]);
9332b857	162	// check if a line break is needed and we have room to print it in our array
bf32dd92	163	if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
	164	// increment and print line break
	165	out_index++;
2767fc02	166	sprintf(tmp++, "%s","\n");
581b31fb	167	}
bf32dd92	168	in_index++;
bf32dd92	169	}
581b31fb	170	// last char.
581b31fb	171	sprintf(tmp++, "%u", (unsigned int) data[in_index]);
79544b28	172	return buf;
	173	}
	174
2767fc02	175	char sprint_bin(const uint8_t data, const size_t len) {
	176	return sprint_bin_break(data, len, 0);
	177	}
0c97a456	178
	179	char sprint_hex_ascii(const uint8_t data, const size_t len) {
	180	static char buf[1024];
508b37ba	181	char *tmp = buf;
9827020a	182	memset(buf, 0x00, 1024);
	183	size_t max_len = (len > 1010) ? 1010 : len;
	184	sprintf(tmp, "%s\| %s", sprint_hex(data, max_len) , data);
0c97a456	185	return buf;
0c97a456	186	}
0d2c5909	187
1f1d974f	188	void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
f89c7050	189	while (len--) {
7d159efe	190	dest[len] = n & 0xFF;
f89c7050 M	191	n >>= 8;
	192	}
	193	}
	194
1f1d974f	195	uint64_t bytes_to_num(uint8_t* src, size_t len) {
f89c7050	196	uint64_t num = 0;
1f1d974f	197	while (len--) {
f89c7050 M	198	num = (num << 8) \| (*src);
	199	src++;
	200	}
	201	return num;
	202	}
f397b5cc	203
0d2c5909	204	// takes a number (uint64_t) and creates a binarray in dest.
0d2c5909	205	void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
a126332a	206	while (len--) {
	207	dest[len] = n & 1;
	208	n >>= 1;
	209	}
	210	}
1f1d974f	211
0d2c5909	212	//least significant bit first
c805748f	213	void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
0d2c5909	214	for(int i = 0 ; i < len ; ++i) {
	215	dest[i] = n & 1;
	216	n >>= 1;
	217	}
	218	}
	219
e1c88b09	220	// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
	221	// to
	222	// hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
	223	// up to 64 bytes or 512 bits
224e8c1a	224	uint8_t SwapEndian64(const uint8_t src, const size_t len, const uint8_t blockSize){
3f5bcc3b	225	static uint8_t buf[64];
224e8c1a	226	memset(buf, 0x00, 64);
	227	uint8_t *tmp = buf;
	228	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
	229	for (size_t i = 0; i < blockSize; i++){
	230	tmp[i+(blockSizeblock)] = src[(blockSize-1-i)+(blockSizeblock)];
e1c88b09	231	}
e1c88b09	232	}
3f5bcc3b	233	return buf;
e1c88b09	234	}
e1c88b09	235
0d2c5909	236	// takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
0d2c5909	237	// returns: the dest array contains the reordered src array.
f4d0ffd1	238	void SwapEndian64ex(const uint8_t src, const size_t len, const uint8_t blockSize, uint8_t dest){
	239	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
	240	for (size_t i = 0; i < blockSize; i++){
	241	dest[i+(blockSizeblock)] = src[(blockSize-1-i)+(blockSizeblock)];
	242	}
	243	}
	244	}
	245
9ca155ba M	246	// -------------------------------------------------------------------------
	247	// string parameters lib
	248	// -------------------------------------------------------------------------
	249
f397b5cc M	250	// -------------------------------------------------------------------------
	251	// line - param line
	252	// bg, en - symbol numbers in param line of beginning an ending parameter
	253	// paramnum - param number (from 0)
	254	// -------------------------------------------------------------------------
	255	int param_getptr(const char line, int bg, int *en, int paramnum)
	256	{
	257	int i;
	258	int len = strlen(line);
	259
	260	*bg = 0;
	261	*en = 0;
	262
	263	// skip spaces
	264	while (line[bg] ==' ' \|\| line[bg]=='\t') (*bg)++;
	265	if (*bg >= len) {
	266	return 1;
	267	}
	268
	269	for (i = 0; i < paramnum; i++) {
	270	while (line[bg]!=' ' && line[bg]!='\t' && line[bg] != '\0') (bg)++;
	271	while (line[bg]==' ' \|\| line[bg]=='\t') (*bg)++;
	272
	273	if (line[*bg] == '\0') return 1;
	274	}
	275
	276	en = bg;
	277	while (line[en] != ' ' && line[en] != '\t' && line[en] != '\0') (en)++;
	278
	279	(*en)--;
	280
	281	return 0;
	282	}
	283
	284	char param_getchar(const char *line, int paramnum)
	285	{
	286	int bg, en;
	287
	288	if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
	289
	290	return line[bg];
	291	}
	292
	293	uint8_t param_get8(const char *line, int paramnum)
	294	{
60e86577	295	return param_get8ex(line, paramnum, 0, 10);
f397b5cc M	296	}
f397b5cc M	297
f6d9fb17	298	/**
31abe49f	299	* @brief Reads a decimal integer (actually, 0-254, not 255)
f6d9fb17 MHS	300	* @param line
f6d9fb17 MHS	301	* @param paramnum
31abe49f	302	* @return -1 if error
f6d9fb17 MHS	303	*/
	304	uint8_t param_getdec(const char line, int paramnum, uint8_t destination)
	305	{
31abe49f	306	uint8_t val = param_get8ex(line, paramnum, 255, 10);
31abe49f	307	if( (int8_t) val == -1) return 1;
f6d9fb17 MHS	308	(*destination) = val;
	309	return 0;
	310	}
	311	/**
	312	* @brief Checks if param is decimal
	313	* @param line
	314	* @param paramnum
	315	* @return
	316	*/
	317	uint8_t param_isdec(const char *line, int paramnum)
	318	{
	319	int bg, en;
	320	//TODO, check more thorougly
	321	if (!param_getptr(line, &bg, &en, paramnum)) return 1;
	322	// return strtoul(&line[bg], NULL, 10) & 0xff;
	323
	324	return 0;
	325	}
	326
f397b5cc M	327	uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
	328	{
	329	int bg, en;
	330
	331	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	332	return strtoul(&line[bg], NULL, base) & 0xff;
f397b5cc M	333	else
	334	return deflt;
	335	}
	336
	337	uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
	338	{
	339	int bg, en;
	340
	341	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	342	return strtoul(&line[bg], NULL, base);
f397b5cc M	343	else
	344	return deflt;
	345	}
	346
	347	uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
	348	{
	349	int bg, en;
	350
	351	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	352	return strtoull(&line[bg], NULL, base);
f397b5cc M	353	else
f397b5cc M	354	return deflt;
f397b5cc M	355	}
	356
	357	int param_gethex(const char line, int paramnum, uint8_t data, int hexcnt)
	358	{
	359	int bg, en, temp, i;
	360
508b37ba	361	if (hexcnt & 1) return 1;
f397b5cc M	362
	363	if (param_getptr(line, &bg, &en, paramnum)) return 1;
	364
508b37ba	365	if (en - bg + 1 != hexcnt) return 1;
f397b5cc M	366
	367	for(i = 0; i < hexcnt; i += 2) {
	368	if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
	369
	370	sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
	371	data[i / 2] = temp & 0xff;
	372	}
	373
	374	return 0;
	375	}
e98572a1	376	int param_gethex_ex(const char line, int paramnum, uint8_t data, int *hexcnt)
	377	{
	378	int bg, en, temp, i;
	379
	380	//if (hexcnt % 2)
	381	// return 1;
	382
	383	if (param_getptr(line, &bg, &en, paramnum)) return 1;
	384
	385	*hexcnt = en - bg + 1;
	386	if (*hexcnt % 2) //error if not complete hex bytes
	387	return 1;
aea4d766	388
e98572a1	389	for(i = 0; i < *hexcnt; i += 2) {
3bc7b13d	390	if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
e98572a1	391
	392	sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
	393	data[i / 2] = temp & 0xff;
	394	}
	395
	396	return 0;
	397	}
aea4d766	398	int param_getstr(const char line, int paramnum, char str)
	399	{
	400	int bg, en;
	401
	402	if (param_getptr(line, &bg, &en, paramnum)) return 0;
	403
	404	memcpy(str, line + bg, en - bg + 1);
	405	str[en - bg + 1] = 0;
	406
	407	return en - bg + 1;
	408	}
79544b28	409
	410	/*
	411	The following methods comes from Rfidler sourcecode.
	412	https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
	413	*/
	414
	415	// convert hex to sequence of 0/1 bit values
	416	// returns number of bits converted
	417	int hextobinarray(char target, char source)
	418	{
	419	int length, i, count= 0;
	420	char x;
	421
	422	length = strlen(source);
	423	// process 4 bits (1 hex digit) at a time
	424	while(length--)
	425	{
	426	x= *(source++);
	427	// capitalize
	428	if (x >= 'a' && x <= 'f')
	429	x -= 32;
	430	// convert to numeric value
	431	if (x >= '0' && x <= '9')
	432	x -= '0';
	433	else if (x >= 'A' && x <= 'F')
	434	x -= 'A' - 10;
	435	else
	436	return 0;
	437	// output
	438	for(i= 0 ; i < 4 ; ++i, ++count)
	439	*(target++)= (x >> (3 - i)) & 1;
	440	}
	441
	442	return count;
	443	}
	444
	445	// convert hex to human readable binary string
	446	int hextobinstring(char target, char source)
	447	{
	448	int length;
	449
	450	if(!(length= hextobinarray(target, source)))
	451	return 0;
	452	binarraytobinstring(target, target, length);
	453	return length;
	454	}
	455
	456	// convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
	457	// return number of bits converted
	458	int binarraytohex(char target, char source, int length)
	459	{
	460	unsigned char i, x;
	461	int j = length;
	462
	463	if(j % 4)
	464	return 0;
	465
	466	while(j)
	467	{
	468	for(i= x= 0 ; i < 4 ; ++i)
	469	x += ( source[i] << (3 - i));
	470	sprintf(target,"%X", x);
	471	++target;
	472	source += 4;
473	j -= 4;
474	}
475	return length;
476	}
477
478	// convert binary array to human readable binary
479	void binarraytobinstring(char target, char source, int length)
480	{
481	int i;
482
483	for(i= 0 ; i < length ; ++i)
484	(target++)= (source++) + '0';
485	*target= '\0';
486	}
487
488	// return parity bit required to match type
a126332a	489	uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
79544b28	490	{
79544b28	491	int x;
ab7bb494	492	for( x = 0 ; length > 0 ; --length)
79544b28	493	x += bits[length - 1];
79544b28	494	x %= 2;
79544b28	495	return x ^ type;
	496	}
	497
	498	// add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
a126332a	499	void wiegand_add_parity(uint8_t target, uint8_t source, uint8_t length)
79544b28	500	{
	501	*(target++)= GetParity(source, EVEN, length / 2);
	502	memcpy(target, source, length);
	503	target += length;
	504	*(target)= GetParity(source + length / 2, ODD, length / 2);
	505	}
c3c241f3	506
0d2c5909	507	// xor two arrays together for len items. The dst array contains the new xored values.
c3c241f3	508	void xor(unsigned char * dst, unsigned char * src, size_t len) {
	509	for( ; len > 0; len--,dst++,src++)
	510	dst ^= src;
	511	}
	512
	513	int32_t le24toh (uint8_t data[3]) {
	514	return (data[2] << 16) \| (data[1] << 8) \| data[0];
	515	}
c805748f	516	uint32_t le32toh (uint8_t *data) {
	517	return (uint32_t)( (data[3]<<24) \| (data[2]<<16) \| (data[1]<<8) \| data[0]);
	518	}
0d2c5909	519	// Pack a bitarray into a uint32_t.
ad6219fc	520	uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
9984b173	521
9984b173	522	if (len > 32) return 0;
ad6219fc	523
	524	int i = start;
	525	int j = len-1;
ad6219fc	526	uint32_t tmp = 0;
9984b173	527
ad6219fc	528	for (; j >= 0; --j, ++i)
	529	tmp \|= bits[i] << j;
	530
	531	return tmp;
	532	}
9984b173	533
ab7bb494	534	// RotateLeft - Ultralight, Desfire, works on byte level
ab7bb494	535	// 00-01-02 >> 01-02-00
6bb7609c	536	void rol(uint8_t *data, const size_t len){
9984b173	537	uint8_t first = data[0];
	538	for (size_t i = 0; i < len-1; i++) {
	539	data[i] = data[i+1];
	540	}
	541	data[len-1] = first;
6bb7609c	542	}
6bb7609c	543
0d2c5909	544	// Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
1f1d974f	545	// And clears the rest of the bits.
6bb7609c	546	uint32_t SwapBits(uint32_t value, int nrbits) {
	547	uint32_t newvalue = 0;
	548	for(int i = 0; i < nrbits; i++) {
	549	newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
	550	}
	551	return newvalue;
3e134b4c	552	}
	553	/*
	554	ref http://www.csm.ornl.gov/~dunigan/crc.html
	555	Returns the value v with the bottom b [0,32] bits reflected.
	556	Example: reflect(0x3e23L,3) == 0x3e26
	557	*/
	558	uint32_t reflect(uint32_t v, int b) {
	559	uint32_t t = v;
	560	for ( int i = 0; i < b; ++i) {
	561	if (t & 1)
	562	v \|= BITMASK((b-1)-i);
	563	else
	564	v &= ~BITMASK((b-1)-i);
	565	t>>=1;
	566	}
	567	return v;
	568	}
dae31af2	569
	570	uint64_t HornerScheme(uint64_t num, uint64_t divider, uint64_t factor) {
	571	uint64_t remainder=0, quotient=0, result=0;
	572	remainder = num % divider;
	573	quotient = num / divider;
	574	if(!(quotient == 0 && remainder == 0))
	575	result += HornerScheme(quotient, divider, factor) * factor + remainder;
	576	return result;
	577	}