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1 //-----------------------------------------------------------------------------

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 //-----------------------------------------------------------------------------

11 #include "util.h"

13 #ifndef _WIN32

14 #include <termios.h>

15 #include <sys/ioctl.h>

 int ukbhit(void)

18 {

19 int cnt = 0;

20 int error;

21 static struct termios Otty, Ntty;

   tcgetattr( 0, &Otty);

25 Ntty = Otty;

   Ntty.c_iflag          = 0;       /* input mode                */

   Ntty.c_oflag          = 0;       /* output mode               */

29 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);

36 }

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

39 }

41 #else

42 #include <conio.h>

 int ukbhit(void) {

44 return kbhit();

45 }

46 #endif

48 // log files functions

 void AddLogLine(char *file, char *extData, char *c) {

50 FILE *fLog = NULL;

     char filename[FILE_PATH_SIZE] = {0x00};

52 int len = 0;

54 len = strlen(file);

     if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;

     memcpy(filename, file, len);

         fLog = fopen(filename, "a");

59 if (!fLog) {

                 printf("Could not append log file %s", filename);

61 return;

62 }

         fprintf(fLog, "%s", extData);

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

66 fclose(fLog);

67 }

 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){

         AddLogLine(fileName, extData, sprint_hex(data, len));

71 }

 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);

77 }

 void AddLogCurrentDT(char *fileName) {

80 char buff[20];

81 struct tm *curTime;

         time_t now = time(0);

84 curTime = gmtime(&now);

         strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);

         AddLogLine(fileName, "\nanticollision: ", buff);

88 }

 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {

91 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); 

97 }

99 // printing and converting functions

100

 void print_hex(const uint8_t * data, const size_t len)

102 {

103 size_t i;

104

         for (i=0; i < len; i++)

                 printf("%02x ", data[i]);

107

         printf("\n");

109 }

110

 char * sprint_hex(const uint8_t * data, const size_t len) {

112

         int maxLen = ( len > 1024/3) ? 1024/3 : len;

114 static char buf[1024];

115 char * tmp = buf;

116 size_t i;

117

         for (i=0; i < maxLen; ++i, tmp += 3)

                 sprintf(tmp, "%02x ", data[i]);

120

121 return buf;

122 }

123

 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {

125

         int maxLen = ( len > 1024) ? 1024 : len;

127 static char buf[1024];

128 char *tmp = buf;

129

         for (size_t i=0; i < maxLen; ++i){

                 sprintf(tmp++, "%u", data[i]);

                 if (breaks > 0 && !((i+1) % breaks))

                         sprintf(tmp++, "%s","\n");

134 }

135

136 return buf;

137 }

138

 char *sprint_bin(const uint8_t *data, const size_t len) {

         return sprint_bin_break(data, len, 0);

141 }

 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)

143 {

144 while (len--) {

                 dest[len] = (uint8_t) n;

146 n >>= 8;

147 }

148 }

149

 uint64_t bytes_to_num(uint8_t* src, size_t len)

151 {

152 uint64_t num = 0;

153 while (len--)

154 {

                 num = (num << 8) | (*src);

156 src++;

157 }

158 return num;

159 }

160

161 //assumes little endian

 char * printBits(size_t const size, void const * const ptr)

163 {

     unsigned char *b = (unsigned char*) ptr;    

165 unsigned char byte;

166 static char buf[1024];

167 char * tmp = buf;

168 int i, j;

169

     for (i=size-1;i>=0;i--)

171 {

         for (j=7;j>=0;j--)

173 {

             byte = b[i] & (1<<j);

175 byte >>= j;

             sprintf(tmp, "%u", byte);

177 tmp++;

178 }

179 }

180 return buf;

181 }

182

183 // -------------------------------------------------------------------------

184 // string parameters lib

185 // -------------------------------------------------------------------------

186

187 // -------------------------------------------------------------------------

188 // line - param line

189 // bg, en - symbol numbers in param line of beginning an ending parameter

190 // paramnum - param number (from 0)

191 // -------------------------------------------------------------------------

 int param_getptr(const char *line, int *bg, int *en, int paramnum)

193 {

194 int i;

         int len = strlen(line);

196

197 *bg = 0;

198 *en = 0;

199

200 // skip spaces

         while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;

202 if (*bg >= len) {

203 return 1;

204 }

205

         for (i = 0; i < paramnum; i++) {

                 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;

                 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;

209

                 if (line[*bg] == '\0') return 1;

211 }

212

213 *en = *bg;

         while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;

215

216 (*en)--;

217

218 return 0;

219 }

220

221

 char param_getchar(const char *line, int paramnum)

223 {

224 int bg, en;

225

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

227

228 return line[bg];

229 }

230

 uint8_t param_get8(const char *line, int paramnum)

232 {

         return param_get8ex(line, paramnum, 10, 0);

234 }

235

236 /**

237 * @brief Reads a decimal integer (actually, 0-254, not 255)

238 * @param line

239 * @param paramnum

240 * @return -1 if error

241 */

 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)

243 {

         uint8_t val =  param_get8ex(line, paramnum, 255, 10);

         if( (int8_t) val == -1) return 1;

246 (*destination) = val;

247 return 0;

248 }

249 /**

250 * @brief Checks if param is decimal

251 * @param line

252 * @param paramnum

253 * @return

254 */

 uint8_t param_isdec(const char *line, int paramnum)

256 {

257 int bg, en;

258 //TODO, check more thorougly

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

260 // return strtoul(&line[bg], NULL, 10) & 0xff;

261

262 return 0;

263 }

264

 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)

266 {

267 int bg, en;

268

         if (!param_getptr(line, &bg, &en, paramnum)) 

                 return strtoul(&line[bg], NULL, base) & 0xff;

271 else

272 return deflt;

273 }

274

 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)

276 {

277 int bg, en;

278

         if (!param_getptr(line, &bg, &en, paramnum)) 

                 return strtoul(&line[bg], NULL, base);

281 else

282 return deflt;

283 }

284

 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)

286 {

287 int bg, en;

288

         if (!param_getptr(line, &bg, &en, paramnum)) 

                 return strtoull(&line[bg], NULL, base);

291 else

292 return deflt;

293

294 return 0;

295 }

296

 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)

298 {

         int bg, en, temp, i;

300

         if (hexcnt % 2)

302 return 1;

303

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

305

         if (en - bg + 1 != hexcnt) 

307 return 1;

308

         for(i = 0; i < hexcnt; i += 2) {

                 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) )   return 1;

311

                 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);

                 data[i / 2] = temp & 0xff;

314 }

315

316 return 0;

317 }

318

 int param_getstr(const char *line, int paramnum, char * str)

320 {

321 int bg, en;

322

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

324

         memcpy(str, line + bg, en - bg + 1);

         str[en - bg + 1] = 0;

327

         return en - bg + 1;

329 }

330

331 /*

332 The following methods comes from Rfidler sourcecode.

333 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/

334 */

335

336 // convert hex to sequence of 0/1 bit values

337 // returns number of bits converted

 int hextobinarray(char *target, char *source)

339 {

     int length, i, count= 0;

341 char x;

342

343 length = strlen(source);

344 // process 4 bits (1 hex digit) at a time

345 while(length--)

346 {

347 x= *(source++);

348 // capitalize

         if (x >= 'a' && x <= 'f')

350 x -= 32;

351 // convert to numeric value

         if (x >= '0' && x <= '9')

353 x -= '0';

         else if (x >= 'A' && x <= 'F')

             x -= 'A' - 10;

356 else

357 return 0;

358 // output

         for(i= 0 ; i < 4 ; ++i, ++count)

             *(target++)= (x >> (3 - i)) & 1;

361 }

362

363 return count;

364 }

365

366 // convert hex to human readable binary string

 int hextobinstring(char *target, char *source)

368 {

369 int length;

370

     if(!(length= hextobinarray(target, source)))

372 return 0;

     binarraytobinstring(target, target, length);

374 return length;

375 }

376

377 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)

378 // return number of bits converted

 int binarraytohex(char *target, char *source, int length)

380 {

381 unsigned char i, x;

382 int j = length;

383

     if(j % 4)

385 return 0;

386

387 while(j)

388 {

         for(i= x= 0 ; i < 4 ; ++i)

             x +=  ( source[i] << (3 - i));

         sprintf(target,"%X", x);

392 ++target;

393 source += 4;

394 j -= 4;

395 }

396 return length;

397 }

398

399 // convert binary array to human readable binary

 void binarraytobinstring(char *target, char *source,  int length)

401 {

402 int i;

403

     for(i= 0 ; i < length ; ++i)

         *(target++)= *(source++) + '0';

406 *target= '\0';

407 }

408

409 // return parity bit required to match type

 uint8_t GetParity( char *bits, uint8_t type, int length)

411 {

412 int x;

413

     for(x= 0 ; length > 0 ; --length)

         x += bits[length - 1];

416 x %= 2;

417

418 return x ^ type;

419 }

420

421 // 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)

423 {

     *(target++)= GetParity(source, EVEN, length / 2);

     memcpy(target, source, length);

426 target += length;

     *(target)= GetParity(source + length / 2, ODD, length / 2);

428 }