Merge branch 'master' into fix_iclass_sim

[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"

#include <stdint.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <stdarg.h>

#ifdef _WIN32
#include <windows.h>
#endif

#define MAX_BIN_BREAK_LENGTH   (3072+384+1)

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

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

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

  Ntty.c_iflag          = 0x0000;   // input mode
  Ntty.c_oflag          = 0x0000;   // output mode
  Ntty.c_lflag         &= ~ICANON;  // control mode = raw
  Ntty.c_cc[VMIN]       = 1;        // return if at least 1 character is in the queue
  Ntty.c_cc[VTIME]      = 0;        // no timeout. Wait forever

  if (0 == (error = tcsetattr(STDIN_FILENO, TCSANOW, &Ntty))) {   // set new attributes
        error += ioctl(STDIN_FILENO, FIONREAD, &cnt);                 // get number of characters availabe
        error += tcsetattr(STDIN_FILENO, TCSANOW, &Otty);             // reset attributes
  }

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

char getch(void)
{
        char c;
        int error;
        struct termios Otty, Ntty;
        if ( tcgetattr(STDIN_FILENO, &Otty) == -1 ) return -1;
        Ntty = Otty;
        Ntty.c_lflag &= ~ICANON; /* disable buffered i/o */
        if (0 == (error = tcsetattr(STDIN_FILENO, TCSANOW, &Ntty))) {   // set new attributes
                c = getchar();
                error += tcsetattr(STDIN_FILENO, TCSANOW, &Otty);           // reset attributes
        }
        return ( error == 0 ? c : -1 );
}

#else // _WIN32

#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;

        for (int j = 0; j < byteCount; j++, fnameptr += 2)
                sprintf(fnameptr, "%02x", (unsigned int) uid[j]);
        sprintf(fnameptr, "%s", ext);
}

// fill buffer from structure [{uint8_t data, size_t length},...]
int FillBuffer(uint8_t *data, size_t maxDataLength, size_t *dataLength, ...) {
        *dataLength = 0;
        va_list valist;
        va_start(valist, dataLength);

        uint8_t *vdata = NULL;
        size_t vlength = 0;
        do{
                vdata = va_arg(valist, uint8_t *);
                if (!vdata)
                        break;

                vlength = va_arg(valist, size_t);
                if (*dataLength + vlength >  maxDataLength) {
                        va_end(valist);
                        return 1;
                }

                memcpy(&data[*dataLength], vdata, vlength);
                *dataLength += vlength;

        } while (vdata);

        va_end(valist);

        return 0;
}

bool CheckStringIsHEXValue(const char *value) {
        for (int i = 0; i < strlen(value); i++)
                if (!isxdigit(value[i]))
                        return false;

        if (strlen(value) % 2)
                return false;

        return true;
}

void hex_to_buffer(const uint8_t *buf, const uint8_t *hex_data, const size_t hex_len, const size_t hex_max_len,
        const size_t min_str_len, const size_t spaces_between, bool uppercase) {

        char *tmp = (char *)buf;
        size_t i;
        memset(tmp, 0x00, hex_max_len);

        int maxLen = ( hex_len > hex_max_len) ? hex_max_len : hex_len;

        for (i = 0; i < maxLen; ++i, tmp += 2 + spaces_between) {
                sprintf(tmp, (uppercase) ? "%02X" : "%02x", (unsigned int) hex_data[i]);

                for (int j = 0; j < spaces_between; j++)
                        sprintf(tmp + 2 + j, " ");
        }

        i *= (2 + spaces_between);
        int minStrLen = min_str_len > i ? min_str_len : 0;
        if (minStrLen > hex_max_len)
                minStrLen = hex_max_len;
        for(; i < minStrLen; i++, tmp += 1)
                sprintf(tmp, " ");

        return;
}

// printing and converting functions

char *sprint_hex(const uint8_t *data, const size_t len) {
        static char buf[4097] = {0};

        hex_to_buffer((uint8_t *)buf, data, len, sizeof(buf) - 1, 0, 1, false);

        return buf;
}

char *sprint_hex_inrow_ex(const uint8_t *data, const size_t len, const size_t min_str_len) {
        static char buf[4097] = {0};

        hex_to_buffer((uint8_t *)buf, data, len, sizeof(buf) - 1, min_str_len, 0, false);

        return buf;
}

char *sprint_hex_inrow(const uint8_t *data, const size_t len) {
        return sprint_hex_inrow_ex(data, len, 0);
}

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; out_index++) {
                // set character - (should be binary but verify it isn't more than 1 digit)
                if (data[in_index]<10)
                        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_ascii_ex(const uint8_t *data, const size_t len, const size_t min_str_len) {
        static char buf[1024];
        char *tmp = buf;
        memset(buf, 0x00, 1024);
        size_t max_len = (len > 1010) ? 1010 : len;
        size_t i = 0;
        while(i < max_len){
                char c = data[i];
                tmp[i] = ((c < 32) || (c == 127)) ? '.' : c;
                ++i;
        }

        int minStrLen = min_str_len > i ? min_str_len : 0;
        for(; i < minStrLen; ++i)
                tmp[i] = ' ';

        return buf;
}

char *sprint_ascii(const uint8_t *data, const size_t len) {
        return sprint_ascii_ex(data, len, 0);
}

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;
        }
}

//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;
        }
}

// 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;
}

// 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);
        for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
                for (size_t i = 0; i < blockSize; i++){
                        buf[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
                }
        }
        return buf;
}

//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", (unsigned int)byte);
                        tmp++;
                }
        }
        return buf;
}

char *printBitsPar(const uint8_t *b, size_t len) {
        static char buf1[512] = {0};
        static char buf2[512] = {0};
        static char *buf;
        if (buf != buf1)
                buf = buf1;
        else
                buf = buf2;
        memset(buf, 0x00, 512);

        for (int i = 0; i < len; i++) {
                buf[i] = ((b[i / 8] << (i % 8)) & 0x80) ? '1':'0';
        }
        return buf;
}


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

//  -------------------------------------------------------------------------
//  line     - param line
//  bg, en   - symbol numbers in param line of beginning and 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;
}


int param_getlength(const char *line, int paramnum)
{
        int bg, en;

        if (param_getptr(line, &bg, &en, paramnum)) return 0;

        return en - bg + 1;
}

char param_getchar(const char *line, int paramnum) {
        return param_getchar_indx(line, 0, paramnum);
}

char param_getchar_indx(const char *line, int indx, int paramnum) {
        int bg, en;

        if (param_getptr(line, &bg, &en, paramnum)) return 0x00;

        if (bg + indx > en)
                return '\0';

        return line[bg + indx];
}

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 % 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((unsigned char)line[bg + i]) && isxdigit((unsigned char)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;

        if (en - bg + 1 > *hexcnt) 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((unsigned char)line[bg + i]) && isxdigit((unsigned char)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_to_eol(const char *line, int paramnum, uint8_t * data, int maxdatalen, int *datalen) {
        int bg, en;
        uint32_t temp;
        char buf[5] = {0};

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

        *datalen = 0;

        int indx = bg;
        while (line[indx]) {
                if (line[indx] == '\t' || line[indx] == ' ') {
                        indx++;
                        continue;
                }

                if (isxdigit((unsigned char)line[indx])) {
                        buf[strlen(buf) + 1] = 0x00;
                        buf[strlen(buf)] = line[indx];
                } else {
                        // if we have symbols other than spaces and hex
                        return 1;
                }

                if (*datalen >= maxdatalen) {
                        // if we dont have space in buffer and have symbols to translate
                        return 2;
                }

                if (strlen(buf) >= 2) {
                        sscanf(buf, "%x", &temp);
                        data[*datalen] = (uint8_t)(temp & 0xff);
                        *buf = 0;
                        (*datalen)++;
                }

                indx++;
        }

        if (strlen(buf) > 0)
                //error when not completed hex bytes
                return 3;

        return 0;
}

int param_getstr(const char *line, int paramnum, char * str, size_t buffersize)
{
        int bg, en;

        if (param_getptr(line, &bg, &en, paramnum)) {
                return 0;
        }

        // Prevent out of bounds errors
        if (en - bg + 1 >= buffersize) {
                printf("out of bounds error: want %d bytes have %zd bytes\n", en - bg + 1 + 1, buffersize);
                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* start = source;
        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 {
                        printf("Discovered unknown character %c %d at idx %tu of %s\n", x, x, source - start, start);
                        return 0;
                }
                // output
                for(i= 0 ; i < 4 ; ++i, ++count)
                        *(target++)= (x >> (3 - i)) & 1;
        }

        return count;
}

// 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", (unsigned int)x);
                ++target;
                source += 4;
                j -= 4;
        }
        return length;
}

// 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;
}

// 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;
}


// Replace unprintable characters with a dot in char buffer
void clean_ascii(unsigned char *buf, size_t len) {
  for (size_t i = 0; i < len; i++) {
        if (!isprint(buf[i]))
          buf[i] = '.';
  }
}

// replace \r \n to \0
void strcleanrn(char *buf, size_t len) {
        strcreplace(buf, len, '\n', '\0');
        strcreplace(buf, len, '\r', '\0');
}

// replace char in buffer
void strcreplace(char *buf, size_t len, char from, char to) {
  for (size_t i = 0; i < len; i++) {
        if (buf[i] == from)
          buf[i] = to;
  }
}

char *strmcopy(char *buf) {
        char * str = NULL;
        if ((str = (char*) malloc(strlen(buf) + 1)) != NULL) {
                memset(str, 0, strlen(buf) + 1);
                strcpy(str, buf);
        }
        return str;
}


// determine number of logical CPU cores (use for multithreaded functions)
extern int num_CPUs(void)
{
#if defined(_WIN32)
        #include <sysinfoapi.h>
        SYSTEM_INFO sysinfo;
        GetSystemInfo(&sysinfo);
        return sysinfo.dwNumberOfProcessors;
#elif defined(__linux__) || defined(__APPLE__)
        #include <unistd.h>
        return sysconf(_SC_NPROCESSORS_ONLN);
#else
        return 1;
#endif
}