proxmark3/client/util.c

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//-----------------------------------------------------------------------------
// 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"
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#ifndef _WIN32
#include <termios.h>
#include <sys/ioctl.h>
int ukbhit(void)
{
int cnt = 0;
int error;
static struct termios Otty, Ntty;
tcgetattr( 0, &Otty);
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
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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");
}
char * sprint_hex(const uint8_t * data, const size_t len) {
int maxLen = ( len > 1024/3) ? 1024/3 : len;
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static char buf[1024];
char * tmp = buf;
size_t i;
for (i=0; i < maxLen; ++i, tmp += 3)
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sprintf(tmp, "%02x ", data[i]);
return buf;
}
char * sprint_bin(const uint8_t * data, const size_t len) {
int maxLen = ( len > 1024) ? 1024 : len;
static char buf[1024];
char * tmp = buf;
size_t i;
for (i=0; i < maxLen; ++i, ++tmp)
sprintf(tmp, "%u", data[i]);
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;
}
//assumes little endian
char * printBits(size_t const size, void const * const ptr)
{
unsigned char *b = (unsigned char*) ptr;
unsigned char byte;
static char buf[1024];
char * tmp = buf;
int i, j;
for (i=size-1;i>=0;i--)
{
for (j=7;j>=0;j--)
{
byte = b[i] & (1<<j);
byte >>= j;
sprintf(tmp, "%u", byte);
tmp++;
}
}
return buf;
}
// -------------------------------------------------------------------------
// 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, 10, 0);
}
uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
{
int bg, en;
if (!param_getptr(line, &bg, &en, paramnum))
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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))
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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))
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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 % 2)
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_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( char *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(char *target, char *source, char length)
{
*(target++)= GetParity(source, EVEN, length / 2);
memcpy(target, source, length);
target += length;
*(target)= GetParity(source + length / 2, ODD, length / 2);
}