[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) {
	size_t i;
	for ( i = 0; i < len; ++i) {

		printf("%02X ", data[i]);
		
		// check if a line break is needed
		if ( (breaks > 0) && (i > 0) && !(i % breaks) )
			printf("(%d %d)\n", i , breaks);
	}
	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", 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) {
	107	size_t i;
	108	for ( i = 0; i < len; ++i) {
534983d7	109
9827020a	110	printf("%02X ", data[i]);
	111
	112	// check if a line break is needed
	113	if ( (breaks > 0) && (i > 0) && !(i % breaks) )
a182a680	114	printf("(%d %d)\n", i , breaks);
9827020a	115	}
534983d7	116	printf("\n");
	117	}
	118
334cc089	119	char sprint_hex(const uint8_t data, const size_t len) {
b915fda3	120
b915fda3	121	int maxLen = ( len > 1024/3) ? 1024/3 : len;
534983d7	122	static char buf[1024];
334cc089	123	memset(buf, 0x00, 1024);
534983d7	124	char * tmp = buf;
	125	size_t i;
	126
b915fda3	127	for (i=0; i < maxLen; ++i, tmp += 3)
334cc089	128	sprintf(tmp, "%02X ", data[i]);
534983d7	129
	130	return buf;
	131	}
f89c7050	132
2767fc02	133	char sprint_bin_break(const uint8_t data, const size_t len, const uint8_t breaks) {
bf32dd92	134	// make sure we don't go beyond our char array memory
0c97a456	135	int max_len;
	136	if (breaks==0)
	137	max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
	138	else
	139	max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
	140
bf32dd92	141	static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
	142	//clear memory
	143	memset(buf, 0x00, sizeof(buf));
2767fc02	144	char *tmp = buf;
79544b28	145
bf32dd92	146	size_t in_index = 0;
bf32dd92	147	// loop through the out_index to make sure we don't go too far
ab7bb494	148	for (size_t out_index=0; out_index < max_len-2; out_index++) {
bf32dd92	149	// set character
bf32dd92	150	sprintf(tmp++, "%u", data[in_index]);
9332b857	151	// check if a line break is needed and we have room to print it in our array
bf32dd92	152	if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
	153	// increment and print line break
	154	out_index++;
2767fc02	155	sprintf(tmp++, "%s","\n");
2767fc02	156	}
bf32dd92	157	in_index++;
bf32dd92	158	}
79544b28	159
	160	return buf;
	161	}
	162
2767fc02	163	char sprint_bin(const uint8_t data, const size_t len) {
	164	return sprint_bin_break(data, len, 0);
	165	}
0c97a456	166
	167	char sprint_hex_ascii(const uint8_t data, const size_t len) {
	168	static char buf[1024];
508b37ba	169	char *tmp = buf;
9827020a	170	memset(buf, 0x00, 1024);
	171	size_t max_len = (len > 1010) ? 1010 : len;
	172	sprintf(tmp, "%s\| %s", sprint_hex(data, max_len) , data);
0c97a456	173	return buf;
0c97a456	174	}
f89c7050 M	175	void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
	176	{
	177	while (len--) {
	178	dest[len] = (uint8_t) n;
	179	n >>= 8;
	180	}
	181	}
	182
	183	uint64_t bytes_to_num(uint8_t* src, size_t len)
	184	{
	185	uint64_t num = 0;
	186	while (len--)
	187	{
	188	num = (num << 8) \| (*src);
	189	src++;
	190	}
	191	return num;
	192	}
f397b5cc	193
a126332a	194	void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
	195	while (len--) {
	196	dest[len] = n & 1;
	197	n >>= 1;
	198	}
	199	}
	200
e1c88b09	201	// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
	202	// to
	203	// hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
	204	// up to 64 bytes or 512 bits
224e8c1a	205	uint8_t SwapEndian64(const uint8_t src, const size_t len, const uint8_t blockSize){
f4d0ffd1	206	uint8_t buf[64];
224e8c1a	207	memset(buf, 0x00, 64);
	208	uint8_t *tmp = buf;
	209	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
	210	for (size_t i = 0; i < blockSize; i++){
	211	tmp[i+(blockSizeblock)] = src[(blockSize-1-i)+(blockSizeblock)];
e1c88b09	212	}
e1c88b09	213	}
224e8c1a	214	return tmp;
e1c88b09	215	}
e1c88b09	216
f4d0ffd1	217	void SwapEndian64ex(const uint8_t src, const size_t len, const uint8_t blockSize, uint8_t dest){
	218	for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
	219	for (size_t i = 0; i < blockSize; i++){
	220	dest[i+(blockSizeblock)] = src[(blockSize-1-i)+(blockSizeblock)];
	221	}
	222	}
	223	}
	224
	225
9ca155ba M	226	// -------------------------------------------------------------------------
	227	// string parameters lib
	228	// -------------------------------------------------------------------------
	229
f397b5cc M	230	// -------------------------------------------------------------------------
	231	// line - param line
	232	// bg, en - symbol numbers in param line of beginning an ending parameter
	233	// paramnum - param number (from 0)
	234	// -------------------------------------------------------------------------
	235	int param_getptr(const char line, int bg, int *en, int paramnum)
	236	{
	237	int i;
	238	int len = strlen(line);
	239
	240	*bg = 0;
	241	*en = 0;
	242
	243	// skip spaces
	244	while (line[bg] ==' ' \|\| line[bg]=='\t') (*bg)++;
	245	if (*bg >= len) {
	246	return 1;
	247	}
	248
	249	for (i = 0; i < paramnum; i++) {
	250	while (line[bg]!=' ' && line[bg]!='\t' && line[bg] != '\0') (bg)++;
	251	while (line[bg]==' ' \|\| line[bg]=='\t') (*bg)++;
	252
	253	if (line[*bg] == '\0') return 1;
	254	}
	255
	256	en = bg;
	257	while (line[en] != ' ' && line[en] != '\t' && line[en] != '\0') (en)++;
	258
	259	(*en)--;
	260
	261	return 0;
	262	}
	263
31abe49f	264
f397b5cc M	265	char param_getchar(const char *line, int paramnum)
	266	{
	267	int bg, en;
	268
	269	if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
	270
	271	return line[bg];
	272	}
	273
	274	uint8_t param_get8(const char *line, int paramnum)
	275	{
60e86577	276	return param_get8ex(line, paramnum, 0, 10);
f397b5cc M	277	}
f397b5cc M	278
f6d9fb17	279	/**
31abe49f	280	* @brief Reads a decimal integer (actually, 0-254, not 255)
f6d9fb17 MHS	281	* @param line
f6d9fb17 MHS	282	* @param paramnum
31abe49f	283	* @return -1 if error
f6d9fb17 MHS	284	*/
	285	uint8_t param_getdec(const char line, int paramnum, uint8_t destination)
	286	{
31abe49f	287	uint8_t val = param_get8ex(line, paramnum, 255, 10);
31abe49f	288	if( (int8_t) val == -1) return 1;
f6d9fb17 MHS	289	(*destination) = val;
	290	return 0;
	291	}
	292	/**
	293	* @brief Checks if param is decimal
	294	* @param line
	295	* @param paramnum
	296	* @return
	297	*/
	298	uint8_t param_isdec(const char *line, int paramnum)
	299	{
	300	int bg, en;
	301	//TODO, check more thorougly
	302	if (!param_getptr(line, &bg, &en, paramnum)) return 1;
	303	// return strtoul(&line[bg], NULL, 10) & 0xff;
	304
	305	return 0;
	306	}
	307
f397b5cc M	308	uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
	309	{
	310	int bg, en;
	311
	312	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	313	return strtoul(&line[bg], NULL, base) & 0xff;
f397b5cc M	314	else
	315	return deflt;
	316	}
	317
	318	uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
	319	{
	320	int bg, en;
	321
	322	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	323	return strtoul(&line[bg], NULL, base);
f397b5cc M	324	else
	325	return deflt;
	326	}
	327
	328	uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
	329	{
	330	int bg, en;
	331
	332	if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1	333	return strtoull(&line[bg], NULL, base);
f397b5cc M	334	else
	335	return deflt;
	336
	337	return 0;
	338	}
	339
	340	int param_gethex(const char line, int paramnum, uint8_t data, int hexcnt)
	341	{
	342	int bg, en, temp, i;
	343
508b37ba	344	if (hexcnt & 1) return 1;
f397b5cc M	345
	346	if (param_getptr(line, &bg, &en, paramnum)) return 1;
	347
508b37ba	348	if (en - bg + 1 != hexcnt) return 1;
f397b5cc M	349
	350	for(i = 0; i < hexcnt; i += 2) {
	351	if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
	352
	353	sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
	354	data[i / 2] = temp & 0xff;
	355	}
	356
	357	return 0;
	358	}
e98572a1	359	int param_gethex_ex(const char line, int paramnum, uint8_t data, int *hexcnt)
	360	{
	361	int bg, en, temp, i;
	362
	363	//if (hexcnt % 2)
	364	// return 1;
	365
	366	if (param_getptr(line, &bg, &en, paramnum)) return 1;
	367
	368	*hexcnt = en - bg + 1;
	369	if (*hexcnt % 2) //error if not complete hex bytes
	370	return 1;
aea4d766	371
e98572a1	372	for(i = 0; i < *hexcnt; i += 2) {
3bc7b13d	373	if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
e98572a1	374
	375	sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
	376	data[i / 2] = temp & 0xff;
	377	}
	378
	379	return 0;
	380	}
aea4d766	381	int param_getstr(const char line, int paramnum, char str)
	382	{
	383	int bg, en;
	384
	385	if (param_getptr(line, &bg, &en, paramnum)) return 0;
	386
	387	memcpy(str, line + bg, en - bg + 1);
	388	str[en - bg + 1] = 0;
	389
	390	return en - bg + 1;
	391	}
79544b28	392
	393	/*
	394	The following methods comes from Rfidler sourcecode.
	395	https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
	396	*/
	397
	398	// convert hex to sequence of 0/1 bit values
	399	// returns number of bits converted
	400	int hextobinarray(char target, char source)
	401	{
	402	int length, i, count= 0;
	403	char x;
	404
	405	length = strlen(source);
	406	// process 4 bits (1 hex digit) at a time
	407	while(length--)
	408	{
	409	x= *(source++);
	410	// capitalize
	411	if (x >= 'a' && x <= 'f')
	412	x -= 32;
	413	// convert to numeric value
	414	if (x >= '0' && x <= '9')
	415	x -= '0';
	416	else if (x >= 'A' && x <= 'F')
	417	x -= 'A' - 10;
	418	else
	419	return 0;
	420	// output
	421	for(i= 0 ; i < 4 ; ++i, ++count)
	422	*(target++)= (x >> (3 - i)) & 1;
	423	}
	424
	425	return count;
	426	}
	427
	428	// convert hex to human readable binary string
	429	int hextobinstring(char target, char source)
	430	{
	431	int length;
	432
	433	if(!(length= hextobinarray(target, source)))
	434	return 0;
	435	binarraytobinstring(target, target, length);
	436	return length;
	437	}
	438
	439	// convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
	440	// return number of bits converted
	441	int binarraytohex(char target, char source, int length)
	442	{
	443	unsigned char i, x;
	444	int j = length;
	445
	446	if(j % 4)
	447	return 0;
	448
	449	while(j)
	450	{
	451	for(i= x= 0 ; i < 4 ; ++i)
	452	x += ( source[i] << (3 - i));
	453	sprintf(target,"%X", x);
	454	++target;
	455	source += 4;
456	j -= 4;
457	}
458	return length;
459	}
460
461	// convert binary array to human readable binary
462	void binarraytobinstring(char target, char source, int length)
463	{
464	int i;
465
466	for(i= 0 ; i < length ; ++i)
467	(target++)= (source++) + '0';
468	*target= '\0';
469	}
470
471	// return parity bit required to match type
a126332a	472	uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
79544b28	473	{
79544b28	474	int x;
ab7bb494	475	for( x = 0 ; length > 0 ; --length)
79544b28	476	x += bits[length - 1];
79544b28	477	x %= 2;
79544b28	478	return x ^ type;
	479	}
	480
	481	// add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
a126332a	482	void wiegand_add_parity(uint8_t target, uint8_t source, uint8_t length)
79544b28	483	{
	484	*(target++)= GetParity(source, EVEN, length / 2);
	485	memcpy(target, source, length);
	486	target += length;
	487	*(target)= GetParity(source + length / 2, ODD, length / 2);
	488	}
c3c241f3	489
	490	void xor(unsigned char * dst, unsigned char * src, size_t len) {
	491	for( ; len > 0; len--,dst++,src++)
	492	dst ^= src;
	493	}
	494
	495	int32_t le24toh (uint8_t data[3]) {
	496	return (data[2] << 16) \| (data[1] << 8) \| data[0];
	497	}
ad6219fc	498
ad6219fc	499	uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
9984b173	500
9984b173	501	if (len > 32) return 0;
ad6219fc	502
	503	int i = start;
	504	int j = len-1;
ad6219fc	505	uint32_t tmp = 0;
9984b173	506
ad6219fc	507	for (; j >= 0; --j, ++i)
	508	tmp \|= bits[i] << j;
	509
	510	return tmp;
	511	}
9984b173	512
ab7bb494	513	// RotateLeft - Ultralight, Desfire, works on byte level
ab7bb494	514	// 00-01-02 >> 01-02-00
6bb7609c	515	void rol(uint8_t *data, const size_t len){
9984b173	516	uint8_t first = data[0];
	517	for (size_t i = 0; i < len-1; i++) {
	518	data[i] = data[i+1];
	519	}
	520	data[len-1] = first;
6bb7609c	521	}
	522
	523	uint32_t SwapBits(uint32_t value, int nrbits) {
	524	uint32_t newvalue = 0;
	525	for(int i = 0; i < nrbits; i++) {
	526	newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
	527	}
	528	return newvalue;
9984b173	529	}