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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"
12
13 #include <stdint.h>
14 #include <string.h>
15 #include <ctype.h>
16 #include <stdlib.h>
17 #include <stdio.h>
18 #include <time.h>
19 #include <stdarg.h>
20
21 #ifdef _WIN32
22 #include <windows.h>
23 #endif
24
25 #define MAX_BIN_BREAK_LENGTH (3072+384+1)
26
27 #ifndef _WIN32
28 #include <termios.h>
29 #include <sys/ioctl.h>
30 #include <unistd.h>
31
32 int ukbhit(void)
33 {
34 int cnt = 0;
35 int error;
36 static struct termios Otty, Ntty;
37
38 if ( tcgetattr(STDIN_FILENO, &Otty) == -1 ) return -1;
39 Ntty = Otty;
40
41 Ntty.c_iflag = 0x0000; // input mode
42 Ntty.c_oflag = 0x0000; // output mode
43 Ntty.c_lflag &= ~ICANON; // control mode = raw
44 Ntty.c_cc[VMIN] = 1; // return if at least 1 character is in the queue
45 Ntty.c_cc[VTIME] = 0; // no timeout. Wait forever
46
47 if (0 == (error = tcsetattr(STDIN_FILENO, TCSANOW, &Ntty))) { // set new attributes
48 error += ioctl(STDIN_FILENO, FIONREAD, &cnt); // get number of characters availabe
49 error += tcsetattr(STDIN_FILENO, TCSANOW, &Otty); // reset attributes
50 }
51
52 return ( error == 0 ? cnt : -1 );
53 }
54
55 char getch(void)
56 {
57 char c;
58 int error;
59 struct termios Otty, Ntty;
60 if ( tcgetattr(STDIN_FILENO, &Otty) == -1 ) return -1;
61 Ntty = Otty;
62 Ntty.c_lflag &= ~ICANON; /* disable buffered i/o */
63 if (0 == (error = tcsetattr(STDIN_FILENO, TCSANOW, &Ntty))) { // set new attributes
64 c = getchar();
65 error += tcsetattr(STDIN_FILENO, TCSANOW, &Otty); // reset attributes
66 }
67 return ( error == 0 ? c : -1 );
68 }
69
70 #else // _WIN32
71
72 #include <conio.h>
73 int ukbhit(void) {
74 return kbhit();
75 }
76 #endif
77
78 // log files functions
79 void AddLogLine(char *file, char *extData, char *c) {
80 FILE *fLog = NULL;
81 char filename[FILE_PATH_SIZE] = {0x00};
82 int len = 0;
83
84 len = strlen(file);
85 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
86 memcpy(filename, file, len);
87
88 fLog = fopen(filename, "a");
89 if (!fLog) {
90 printf("Could not append log file %s", filename);
91 return;
92 }
93
94 fprintf(fLog, "%s", extData);
95 fprintf(fLog, "%s\n", c);
96 fclose(fLog);
97 }
98
99 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
100 AddLogLine(fileName, extData, sprint_hex(data, len));
101 }
102
103 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
104 char buf[100] = {0};
105 sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
106 AddLogLine(fileName, extData, buf);
107 }
108
109 void AddLogCurrentDT(char *fileName) {
110 char buff[20];
111 struct tm *curTime;
112
113 time_t now = time(0);
114 curTime = gmtime(&now);
115
116 strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
117 AddLogLine(fileName, "\nanticollision: ", buff);
118 }
119
120 void FillFileNameByUID(char *fileName, uint8_t *uid, char *ext, int byteCount) {
121 char * fnameptr = fileName;
122
123 for (int j = 0; j < byteCount; j++, fnameptr += 2)
124 sprintf(fnameptr, "%02x", (unsigned int) uid[j]);
125 sprintf(fnameptr, "%s", ext);
126 }
127
128 // fill buffer from structure [{uint8_t data, size_t length},...]
129 int FillBuffer(uint8_t *data, size_t maxDataLength, size_t *dataLength, ...) {
130 *dataLength = 0;
131 va_list valist;
132 va_start(valist, dataLength);
133
134 uint8_t *vdata = NULL;
135 size_t vlength = 0;
136 do{
137 vdata = va_arg(valist, uint8_t *);
138 if (!vdata)
139 break;
140
141 vlength = va_arg(valist, size_t);
142 if (*dataLength + vlength > maxDataLength) {
143 va_end(valist);
144 return 1;
145 }
146
147 memcpy(&data[*dataLength], vdata, vlength);
148 *dataLength += vlength;
149
150 } while (vdata);
151
152 va_end(valist);
153
154 return 0;
155 }
156
157 bool CheckStringIsHEXValue(const char *value) {
158 for (int i = 0; i < strlen(value); i++)
159 if (!isxdigit(value[i]))
160 return false;
161
162 if (strlen(value) % 2)
163 return false;
164
165 return true;
166 }
167
168 void hex_to_buffer(const uint8_t *buf, const uint8_t *hex_data, const size_t hex_len, const size_t hex_max_len,
169 const size_t min_str_len, const size_t spaces_between, bool uppercase) {
170
171 char *tmp = (char *)buf;
172
173 int maxLen = (hex_len > hex_max_len) ? hex_max_len : hex_len;
174
175 for (int i = 0; i < maxLen; ++i, tmp += 2 + spaces_between) {
176 sprintf(tmp, (uppercase) ? "%02X" : "%02x", (unsigned int) hex_data[i]);
177
178 if (i != maxLen - 1)
179 for (int j = 0; j < spaces_between; j++)
180 sprintf(tmp + 2 + j, " ");
181 }
182
183 size_t len = strlen(tmp);
184 int minStrLen = min_str_len > len ? min_str_len : 0;
185 if (minStrLen > hex_max_len)
186 minStrLen = hex_max_len;
187 for (int i = len; i < minStrLen; i++, tmp += 1)
188 sprintf(tmp, " ");
189
190 return;
191 }
192
193 // printing and converting functions
194
195 char *sprint_hex(const uint8_t *data, const size_t len) {
196 static char buf[4097] = {0};
197
198 hex_to_buffer((uint8_t *)buf, data, len, sizeof(buf) - 1, 0, 1, false);
199
200 return buf;
201 }
202
203 char *sprint_hex_inrow_ex(const uint8_t *data, const size_t len, const size_t min_str_len) {
204 static char buf[4097] = {0};
205
206 hex_to_buffer((uint8_t *)buf, data, len, sizeof(buf) - 1, min_str_len, 0, false);
207
208 return buf;
209 }
210
211 char *sprint_hex_inrow(const uint8_t *data, const size_t len) {
212 return sprint_hex_inrow_ex(data, len, 0);
213 }
214
215 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
216 // make sure we don't go beyond our char array memory
217 int max_len;
218 if (breaks==0)
219 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
220 else
221 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
222
223 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
224 //clear memory
225 memset(buf, 0x00, sizeof(buf));
226 char *tmp = buf;
227
228 size_t in_index = 0;
229 // loop through the out_index to make sure we don't go too far
230 for (size_t out_index=0; out_index < max_len; out_index++) {
231 // set character - (should be binary but verify it isn't more than 1 digit)
232 if (data[in_index]<10)
233 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
234 // check if a line break is needed and we have room to print it in our array
235 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 < max_len) ) {
236 // increment and print line break
237 out_index++;
238 sprintf(tmp++, "%s","\n");
239 }
240 in_index++;
241 }
242
243 return buf;
244 }
245
246 char *sprint_bin(const uint8_t *data, const size_t len) {
247 return sprint_bin_break(data, len, 0);
248 }
249
250 char *sprint_ascii_ex(const uint8_t *data, const size_t len, const size_t min_str_len) {
251 static char buf[1024];
252 char *tmp = buf;
253 memset(buf, 0x00, 1024);
254 size_t max_len = (len > 1010) ? 1010 : len;
255 size_t i = 0;
256 while(i < max_len){
257 char c = data[i];
258 tmp[i] = ((c < 32) || (c == 127)) ? '.' : c;
259 ++i;
260 }
261
262 int minStrLen = min_str_len > i ? min_str_len : 0;
263 for(; i < minStrLen; ++i)
264 tmp[i] = ' ';
265
266 return buf;
267 }
268
269 char *sprint_ascii(const uint8_t *data, const size_t len) {
270 return sprint_ascii_ex(data, len, 0);
271 }
272
273 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
274 {
275 while (len--) {
276 dest[len] = (uint8_t) n;
277 n >>= 8;
278 }
279 }
280
281 uint64_t bytes_to_num(uint8_t* src, size_t len)
282 {
283 uint64_t num = 0;
284 while (len--)
285 {
286 num = (num << 8) | (*src);
287 src++;
288 }
289 return num;
290 }
291
292 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
293 while (len--) {
294 dest[len] = n & 1;
295 n >>= 1;
296 }
297 }
298
299 //least significant bit first
300 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
301 for(int i = 0 ; i < len ; ++i) {
302 dest[i] = n & 1;
303 n >>= 1;
304 }
305 }
306
307 // Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
308 // And clears the rest of the bits.
309 uint32_t SwapBits(uint32_t value, int nrbits) {
310 uint32_t newvalue = 0;
311 for(int i = 0; i < nrbits; i++) {
312 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
313 }
314 return newvalue;
315 }
316
317 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
318 // to
319 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
320 // up to 64 bytes or 512 bits
321 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
322 static uint8_t buf[64];
323 memset(buf, 0x00, 64);
324 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
325 for (size_t i = 0; i < blockSize; i++){
326 buf[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
327 }
328 }
329 return buf;
330 }
331
332 //assumes little endian
333 char *printBits(size_t const size, void const * const ptr)
334 {
335 unsigned char *b = (unsigned char*) ptr;
336 unsigned char byte;
337 static char buf[1024];
338 char *tmp = buf;
339 int i, j;
340
341 for (i=size-1;i>=0;i--)
342 {
343 for (j=7;j>=0;j--)
344 {
345 byte = b[i] & (1<<j);
346 byte >>= j;
347 sprintf(tmp, "%u", (unsigned int)byte);
348 tmp++;
349 }
350 }
351 return buf;
352 }
353
354 char *printBitsPar(const uint8_t *b, size_t len) {
355 static char buf1[512] = {0};
356 static char buf2[512] = {0};
357 static char *buf;
358 if (buf != buf1)
359 buf = buf1;
360 else
361 buf = buf2;
362 memset(buf, 0x00, 512);
363
364 for (int i = 0; i < len; i++) {
365 buf[i] = ((b[i / 8] << (i % 8)) & 0x80) ? '1':'0';
366 }
367 return buf;
368 }
369
370
371 // -------------------------------------------------------------------------
372 // string parameters lib
373 // -------------------------------------------------------------------------
374
375 // -------------------------------------------------------------------------
376 // line - param line
377 // bg, en - symbol numbers in param line of beginning and ending parameter
378 // paramnum - param number (from 0)
379 // -------------------------------------------------------------------------
380 int param_getptr(const char *line, int *bg, int *en, int paramnum)
381 {
382 int i;
383 int len = strlen(line);
384
385 *bg = 0;
386 *en = 0;
387
388 // skip spaces
389 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
390 if (*bg >= len) {
391 return 1;
392 }
393
394 for (i = 0; i < paramnum; i++) {
395 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
396 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
397
398 if (line[*bg] == '\0') return 1;
399 }
400
401 *en = *bg;
402 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
403
404 (*en)--;
405
406 return 0;
407 }
408
409
410 int param_getlength(const char *line, int paramnum)
411 {
412 int bg, en;
413
414 if (param_getptr(line, &bg, &en, paramnum)) return 0;
415
416 return en - bg + 1;
417 }
418
419 char param_getchar(const char *line, int paramnum) {
420 return param_getchar_indx(line, 0, paramnum);
421 }
422
423 char param_getchar_indx(const char *line, int indx, int paramnum) {
424 int bg, en;
425
426 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
427
428 if (bg + indx > en)
429 return '\0';
430
431 return line[bg + indx];
432 }
433
434 uint8_t param_get8(const char *line, int paramnum)
435 {
436 return param_get8ex(line, paramnum, 0, 10);
437 }
438
439 /**
440 * @brief Reads a decimal integer (actually, 0-254, not 255)
441 * @param line
442 * @param paramnum
443 * @return -1 if error
444 */
445 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
446 {
447 uint8_t val = param_get8ex(line, paramnum, 255, 10);
448 if( (int8_t) val == -1) return 1;
449 (*destination) = val;
450 return 0;
451 }
452 /**
453 * @brief Checks if param is decimal
454 * @param line
455 * @param paramnum
456 * @return
457 */
458 uint8_t param_isdec(const char *line, int paramnum)
459 {
460 int bg, en;
461 //TODO, check more thorougly
462 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
463 // return strtoul(&line[bg], NULL, 10) & 0xff;
464
465 return 0;
466 }
467
468 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
469 {
470 int bg, en;
471
472 if (!param_getptr(line, &bg, &en, paramnum))
473 return strtoul(&line[bg], NULL, base) & 0xff;
474 else
475 return deflt;
476 }
477
478 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
479 {
480 int bg, en;
481
482 if (!param_getptr(line, &bg, &en, paramnum))
483 return strtoul(&line[bg], NULL, base);
484 else
485 return deflt;
486 }
487
488 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
489 {
490 int bg, en;
491
492 if (!param_getptr(line, &bg, &en, paramnum))
493 return strtoull(&line[bg], NULL, base);
494 else
495 return deflt;
496 }
497
498 int param_gethex(const char *line, int paramnum, uint8_t *data, int hexcnt)
499 {
500 int bg, en, temp, i;
501
502 if (hexcnt % 2)
503 return 1;
504
505 if (param_getptr(line, &bg, &en, paramnum)) return 1;
506
507 if (en - bg + 1 != hexcnt)
508 return 1;
509
510 for(i = 0; i < hexcnt; i += 2) {
511 if (!(isxdigit((unsigned char)line[bg + i]) && isxdigit((unsigned char)line[bg + i + 1])) ) return 1;
512
513 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
514 data[i / 2] = temp & 0xff;
515 }
516
517 return 0;
518 }
519
520 int param_gethex_ex(const char *line, int paramnum, uint8_t *data, int *hexcnt)
521 {
522 int bg, en, temp, i;
523
524 //if (hexcnt % 2)
525 // return 1;
526
527 if (param_getptr(line, &bg, &en, paramnum)) return 1;
528
529 if (en - bg + 1 > *hexcnt) return 1;
530
531 *hexcnt = en - bg + 1;
532 if (*hexcnt % 2) //error if not complete hex bytes
533 return 1;
534
535 for(i = 0; i < *hexcnt; i += 2) {
536 if (!(isxdigit((unsigned char)line[bg + i]) && isxdigit((unsigned char)line[bg + i + 1])) ) return 1;
537
538 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
539 data[i / 2] = temp & 0xff;
540 }
541
542 return 0;
543 }
544
545 int param_gethex_to_eol(const char *line, int paramnum, uint8_t * data, int maxdatalen, int *datalen) {
546 int bg, en;
547 uint32_t temp;
548 char buf[5] = {0};
549
550 if (param_getptr(line, &bg, &en, paramnum)) return 1;
551
552 *datalen = 0;
553
554 int indx = bg;
555 while (line[indx]) {
556 if (line[indx] == '\t' || line[indx] == ' ') {
557 indx++;
558 continue;
559 }
560
561 if (isxdigit((unsigned char)line[indx])) {
562 buf[strlen(buf) + 1] = 0x00;
563 buf[strlen(buf)] = line[indx];
564 } else {
565 // if we have symbols other than spaces and hex
566 return 1;
567 }
568
569 if (*datalen >= maxdatalen) {
570 // if we dont have space in buffer and have symbols to translate
571 return 2;
572 }
573
574 if (strlen(buf) >= 2) {
575 sscanf(buf, "%x", &temp);
576 data[*datalen] = (uint8_t)(temp & 0xff);
577 *buf = 0;
578 (*datalen)++;
579 }
580
581 indx++;
582 }
583
584 if (strlen(buf) > 0)
585 //error when not completed hex bytes
586 return 3;
587
588 return 0;
589 }
590
591 int param_getstr(const char *line, int paramnum, char * str, size_t buffersize)
592 {
593 int bg, en;
594
595 if (param_getptr(line, &bg, &en, paramnum)) {
596 return 0;
597 }
598
599 // Prevent out of bounds errors
600 if (en - bg + 1 >= buffersize) {
601 printf("out of bounds error: want %d bytes have %zd bytes\n", en - bg + 1 + 1, buffersize);
602 return 0;
603 }
604
605 memcpy(str, line + bg, en - bg + 1);
606 str[en - bg + 1] = 0;
607
608 return en - bg + 1;
609 }
610
611 /*
612 The following methods comes from Rfidler sourcecode.
613 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
614 */
615
616 // convert hex to sequence of 0/1 bit values
617 // returns number of bits converted
618 int hextobinarray(char *target, char *source)
619 {
620 int length, i, count= 0;
621 char* start = source;
622 char x;
623
624 length = strlen(source);
625 // process 4 bits (1 hex digit) at a time
626 while(length--)
627 {
628 x= *(source++);
629 // capitalize
630 if (x >= 'a' && x <= 'f')
631 x -= 32;
632 // convert to numeric value
633 if (x >= '0' && x <= '9')
634 x -= '0';
635 else if (x >= 'A' && x <= 'F')
636 x -= 'A' - 10;
637 else {
638 printf("Discovered unknown character %c %d at idx %tu of %s\n", x, x, source - start, start);
639 return 0;
640 }
641 // output
642 for(i= 0 ; i < 4 ; ++i, ++count)
643 *(target++)= (x >> (3 - i)) & 1;
644 }
645
646 return count;
647 }
648
649 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
650 // return number of bits converted
651 int binarraytohex(char *target,char *source, int length)
652 {
653 unsigned char i, x;
654 int j = length;
655
656 if(j % 4)
657 return 0;
658
659 while(j)
660 {
661 for(i= x= 0 ; i < 4 ; ++i)
662 x += ( source[i] << (3 - i));
663 sprintf(target,"%X", (unsigned int)x);
664 ++target;
665 source += 4;
666 j -= 4;
667 }
668 return length;
669 }
670
671 // return parity bit required to match type
672 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
673 {
674 int x;
675
676 for(x= 0 ; length > 0 ; --length)
677 x += bits[length - 1];
678 x %= 2;
679
680 return x ^ type;
681 }
682
683 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
684 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
685 {
686 *(target++)= GetParity(source, EVEN, length / 2);
687 memcpy(target, source, length);
688 target += length;
689 *(target)= GetParity(source + length / 2, ODD, length / 2);
690 }
691
692 // xor two arrays together for len items. The dst array contains the new xored values.
693 void xor(unsigned char *dst, unsigned char *src, size_t len) {
694 for( ; len > 0; len--,dst++,src++)
695 *dst ^= *src;
696 }
697
698 // RotateLeft - Ultralight, Desfire, works on byte level
699 // 00-01-02 >> 01-02-00
700 void rol(uint8_t *data, const size_t len){
701 uint8_t first = data[0];
702 for (size_t i = 0; i < len-1; i++) {
703 data[i] = data[i+1];
704 }
705 data[len-1] = first;
706 }
707
708
709 // Replace unprintable characters with a dot in char buffer
710 void clean_ascii(unsigned char *buf, size_t len) {
711 for (size_t i = 0; i < len; i++) {
712 if (!isprint(buf[i]))
713 buf[i] = '.';
714 }
715 }
716
717 // replace \r \n to \0
718 void strcleanrn(char *buf, size_t len) {
719 strcreplace(buf, len, '\n', '\0');
720 strcreplace(buf, len, '\r', '\0');
721 }
722
723 // replace char in buffer
724 void strcreplace(char *buf, size_t len, char from, char to) {
725 for (size_t i = 0; i < len; i++) {
726 if (buf[i] == from)
727 buf[i] = to;
728 }
729 }
730
731 char *strmcopy(char *buf) {
732 char * str = NULL;
733 if ((str = (char*) malloc(strlen(buf) + 1)) != NULL) {
734 memset(str, 0, strlen(buf) + 1);
735 strcpy(str, buf);
736 }
737 return str;
738 }
739
740
741 // determine number of logical CPU cores (use for multithreaded functions)
742 extern int num_CPUs(void)
743 {
744 #if defined(_WIN32)
745 #include <sysinfoapi.h>
746 SYSTEM_INFO sysinfo;
747 GetSystemInfo(&sysinfo);
748 return sysinfo.dwNumberOfProcessors;
749 #elif defined(__linux__) || defined(__APPLE__)
750 #include <unistd.h>
751 return sysconf(_SC_NPROCESSORS_ONLN);
752 #else
753 return 1;
754 #endif
755 }
756
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