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