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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 size_t i;
173 memset(tmp, 0x00, hex_max_len);
174
175 int maxLen = ( hex_len > hex_max_len) ? hex_max_len : hex_len;
176
177 for (i = 0; i < maxLen; ++i, tmp += 2 + spaces_between) {
178 sprintf(tmp, (uppercase) ? "%02X" : "%02x", (unsigned int) hex_data[i]);
179
180 for (int j = 0; j < spaces_between; j++)
181 sprintf(tmp + 2 + j, " ");
182 }
183
184 i *= (2 + spaces_between);
185 int minStrLen = min_str_len > i ? min_str_len : 0;
186 if (minStrLen > hex_max_len)
187 minStrLen = hex_max_len;
188 for(; i < minStrLen; i++, tmp += 1)
189 sprintf(tmp, " ");
190
191 return;
192 }
193
194 // printing and converting functions
195
196 char *sprint_hex(const uint8_t *data, const size_t len) {
197 static char buf[4097] = {0};
198
199 hex_to_buffer((uint8_t *)buf, data, len, sizeof(buf) - 1, 0, 1, false);
200
201 return buf;
202 }
203
204 char *sprint_hex_inrow_ex(const uint8_t *data, const size_t len, const size_t min_str_len) {
205 static char buf[4097] = {0};
206
207 hex_to_buffer((uint8_t *)buf, data, len, sizeof(buf) - 1, min_str_len, 0, false);
208
209 return buf;
210 }
211
212 char *sprint_hex_inrow(const uint8_t *data, const size_t len) {
213 return sprint_hex_inrow_ex(data, len, 0);
214 }
215
216 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
217 // make sure we don't go beyond our char array memory
218 int max_len;
219 if (breaks==0)
220 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
221 else
222 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
223
224 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
225 //clear memory
226 memset(buf, 0x00, sizeof(buf));
227 char *tmp = buf;
228
229 size_t in_index = 0;
230 // loop through the out_index to make sure we don't go too far
231 for (size_t out_index=0; out_index < max_len; out_index++) {
232 // set character - (should be binary but verify it isn't more than 1 digit)
233 if (data[in_index]<10)
234 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
235 // check if a line break is needed and we have room to print it in our array
236 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 < max_len) ) {
237 // increment and print line break
238 out_index++;
239 sprintf(tmp++, "%s","\n");
240 }
241 in_index++;
242 }
243
244 return buf;
245 }
246
247 char *sprint_bin(const uint8_t *data, const size_t len) {
248 return sprint_bin_break(data, len, 0);
249 }
250
251 char *sprint_ascii_ex(const uint8_t *data, const size_t len, const size_t min_str_len) {
252 static char buf[1024];
253 char *tmp = buf;
254 memset(buf, 0x00, 1024);
255 size_t max_len = (len > 1010) ? 1010 : len;
256 size_t i = 0;
257 while(i < max_len){
258 char c = data[i];
259 tmp[i] = ((c < 32) || (c == 127)) ? '.' : c;
260 ++i;
261 }
262
263 int minStrLen = min_str_len > i ? min_str_len : 0;
264 for(; i < minStrLen; ++i)
265 tmp[i] = ' ';
266
267 return buf;
268 }
269
270 char *sprint_ascii(const uint8_t *data, const size_t len) {
271 return sprint_ascii_ex(data, len, 0);
272 }
273
274 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
275 {
276 while (len--) {
277 dest[len] = (uint8_t) n;
278 n >>= 8;
279 }
280 }
281
282 uint64_t bytes_to_num(uint8_t* src, size_t len)
283 {
284 uint64_t num = 0;
285 while (len--)
286 {
287 num = (num << 8) | (*src);
288 src++;
289 }
290 return num;
291 }
292
293 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
294 while (len--) {
295 dest[len] = n & 1;
296 n >>= 1;
297 }
298 }
299
300 //least significant bit first
301 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
302 for(int i = 0 ; i < len ; ++i) {
303 dest[i] = n & 1;
304 n >>= 1;
305 }
306 }
307
308 // Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
309 // And clears the rest of the bits.
310 uint32_t SwapBits(uint32_t value, int nrbits) {
311 uint32_t newvalue = 0;
312 for(int i = 0; i < nrbits; i++) {
313 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
314 }
315 return newvalue;
316 }
317
318 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
319 // to
320 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
321 // up to 64 bytes or 512 bits
322 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
323 static uint8_t buf[64];
324 memset(buf, 0x00, 64);
325 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
326 for (size_t i = 0; i < blockSize; i++){
327 buf[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
328 }
329 }
330 return buf;
331 }
332
333 //assumes little endian
334 char *printBits(size_t const size, void const * const ptr)
335 {
336 unsigned char *b = (unsigned char*) ptr;
337 unsigned char byte;
338 static char buf[1024];
339 char *tmp = buf;
340 int i, j;
341
342 for (i=size-1;i>=0;i--)
343 {
344 for (j=7;j>=0;j--)
345 {
346 byte = b[i] & (1<<j);
347 byte >>= j;
348 sprintf(tmp, "%u", (unsigned int)byte);
349 tmp++;
350 }
351 }
352 return buf;
353 }
354
355 char *printBitsPar(const uint8_t *b, size_t len) {
356 static char buf1[512] = {0};
357 static char buf2[512] = {0};
358 static char *buf;
359 if (buf != buf1)
360 buf = buf1;
361 else
362 buf = buf2;
363 memset(buf, 0x00, 512);
364
365 for (int i = 0; i < len; i++) {
366 buf[i] = ((b[i / 8] << (i % 8)) & 0x80) ? '1':'0';
367 }
368 return buf;
369 }
370
371
372 // -------------------------------------------------------------------------
373 // string parameters lib
374 // -------------------------------------------------------------------------
375
376 // -------------------------------------------------------------------------
377 // line - param line
378 // bg, en - symbol numbers in param line of beginning and ending parameter
379 // paramnum - param number (from 0)
380 // -------------------------------------------------------------------------
381 int param_getptr(const char *line, int *bg, int *en, int paramnum)
382 {
383 int i;
384 int len = strlen(line);
385
386 *bg = 0;
387 *en = 0;
388
389 // skip spaces
390 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
391 if (*bg >= len) {
392 return 1;
393 }
394
395 for (i = 0; i < paramnum; i++) {
396 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
397 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
398
399 if (line[*bg] == '\0') return 1;
400 }
401
402 *en = *bg;
403 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
404
405 (*en)--;
406
407 return 0;
408 }
409
410
411 int param_getlength(const char *line, int paramnum)
412 {
413 int bg, en;
414
415 if (param_getptr(line, &bg, &en, paramnum)) return 0;
416
417 return en - bg + 1;
418 }
419
420 char param_getchar(const char *line, int paramnum) {
421 return param_getchar_indx(line, 0, paramnum);
422 }
423
424 char param_getchar_indx(const char *line, int indx, int paramnum) {
425 int bg, en;
426
427 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
428
429 if (bg + indx > en)
430 return '\0';
431
432 return line[bg + indx];
433 }
434
435 uint8_t param_get8(const char *line, int paramnum)
436 {
437 return param_get8ex(line, paramnum, 0, 10);
438 }
439
440 /**
441 * @brief Reads a decimal integer (actually, 0-254, not 255)
442 * @param line
443 * @param paramnum
444 * @return -1 if error
445 */
446 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
447 {
448 uint8_t val = param_get8ex(line, paramnum, 255, 10);
449 if( (int8_t) val == -1) return 1;
450 (*destination) = val;
451 return 0;
452 }
453 /**
454 * @brief Checks if param is decimal
455 * @param line
456 * @param paramnum
457 * @return
458 */
459 uint8_t param_isdec(const char *line, int paramnum)
460 {
461 int bg, en;
462 //TODO, check more thorougly
463 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
464 // return strtoul(&line[bg], NULL, 10) & 0xff;
465
466 return 0;
467 }
468
469 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
470 {
471 int bg, en;
472
473 if (!param_getptr(line, &bg, &en, paramnum))
474 return strtoul(&line[bg], NULL, base) & 0xff;
475 else
476 return deflt;
477 }
478
479 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
480 {
481 int bg, en;
482
483 if (!param_getptr(line, &bg, &en, paramnum))
484 return strtoul(&line[bg], NULL, base);
485 else
486 return deflt;
487 }
488
489 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
490 {
491 int bg, en;
492
493 if (!param_getptr(line, &bg, &en, paramnum))
494 return strtoull(&line[bg], NULL, base);
495 else
496 return deflt;
497 }
498
499 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
500 {
501 int bg, en, temp, i;
502
503 if (hexcnt % 2)
504 return 1;
505
506 if (param_getptr(line, &bg, &en, paramnum)) return 1;
507
508 if (en - bg + 1 != hexcnt)
509 return 1;
510
511 for(i = 0; i < hexcnt; i += 2) {
512 if (!(isxdigit((unsigned char)line[bg + i]) && isxdigit((unsigned char)line[bg + i + 1])) ) return 1;
513
514 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
515 data[i / 2] = temp & 0xff;
516 }
517
518 return 0;
519 }
520
521 int param_gethex_ex(const char *line, int paramnum, uint8_t *data, int *hexcnt)
522 {
523 int bg, en, temp, i;
524
525 //if (hexcnt % 2)
526 // return 1;
527
528 if (param_getptr(line, &bg, &en, paramnum)) return 1;
529
530 if (en - bg + 1 > *hexcnt) return 1;
531
532 *hexcnt = en - bg + 1;
533 if (*hexcnt % 2) //error if not complete hex bytes
534 return 1;
535
536 for(i = 0; i < *hexcnt; i += 2) {
537 if (!(isxdigit((unsigned char)line[bg + i]) && isxdigit((unsigned char)line[bg + i + 1])) ) return 1;
538
539 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
540 data[i / 2] = temp & 0xff;
541 }
542
543 return 0;
544 }
545
546 int param_gethex_to_eol(const char *line, int paramnum, uint8_t * data, int maxdatalen, int *datalen) {
547 int bg, en;
548 uint32_t temp;
549 char buf[5] = {0};
550
551 if (param_getptr(line, &bg, &en, paramnum)) return 1;
552
553 *datalen = 0;
554
555 int indx = bg;
556 while (line[indx]) {
557 if (line[indx] == '\t' || line[indx] == ' ') {
558 indx++;
559 continue;
560 }
561
562 if (isxdigit((unsigned char)line[indx])) {
563 buf[strlen(buf) + 1] = 0x00;
564 buf[strlen(buf)] = line[indx];
565 } else {
566 // if we have symbols other than spaces and hex
567 return 1;
568 }
569
570 if (*datalen >= maxdatalen) {
571 // if we dont have space in buffer and have symbols to translate
572 return 2;
573 }
574
575 if (strlen(buf) >= 2) {
576 sscanf(buf, "%x", &temp);
577 data[*datalen] = (uint8_t)(temp & 0xff);
578 *buf = 0;
579 (*datalen)++;
580 }
581
582 indx++;
583 }
584
585 if (strlen(buf) > 0)
586 //error when not completed hex bytes
587 return 3;
588
589 return 0;
590 }
591
592 int param_getstr(const char *line, int paramnum, char * str, size_t buffersize)
593 {
594 int bg, en;
595
596 if (param_getptr(line, &bg, &en, paramnum)) {
597 return 0;
598 }
599
600 // Prevent out of bounds errors
601 if (en - bg + 1 >= buffersize) {
602 printf("out of bounds error: want %d bytes have %zd bytes\n", en - bg + 1 + 1, buffersize);
603 return 0;
604 }
605
606 memcpy(str, line + bg, en - bg + 1);
607 str[en - bg + 1] = 0;
608
609 return en - bg + 1;
610 }
611
612 /*
613 The following methods comes from Rfidler sourcecode.
614 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
615 */
616
617 // convert hex to sequence of 0/1 bit values
618 // returns number of bits converted
619 int hextobinarray(char *target, char *source)
620 {
621 int length, i, count= 0;
622 char* start = source;
623 char x;
624
625 length = strlen(source);
626 // process 4 bits (1 hex digit) at a time
627 while(length--)
628 {
629 x= *(source++);
630 // capitalize
631 if (x >= 'a' && x <= 'f')
632 x -= 32;
633 // convert to numeric value
634 if (x >= '0' && x <= '9')
635 x -= '0';
636 else if (x >= 'A' && x <= 'F')
637 x -= 'A' - 10;
638 else {
639 printf("Discovered unknown character %c %d at idx %tu of %s\n", x, x, source - start, start);
640 return 0;
641 }
642 // output
643 for(i= 0 ; i < 4 ; ++i, ++count)
644 *(target++)= (x >> (3 - i)) & 1;
645 }
646
647 return count;
648 }
649
650 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
651 // return number of bits converted
652 int binarraytohex(char *target,char *source, int length)
653 {
654 unsigned char i, x;
655 int j = length;
656
657 if(j % 4)
658 return 0;
659
660 while(j)
661 {
662 for(i= x= 0 ; i < 4 ; ++i)
663 x += ( source[i] << (3 - i));
664 sprintf(target,"%X", (unsigned int)x);
665 ++target;
666 source += 4;
667 j -= 4;
668 }
669 return length;
670 }
671
672 // return parity bit required to match type
673 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
674 {
675 int x;
676
677 for(x= 0 ; length > 0 ; --length)
678 x += bits[length - 1];
679 x %= 2;
680
681 return x ^ type;
682 }
683
684 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
685 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
686 {
687 *(target++)= GetParity(source, EVEN, length / 2);
688 memcpy(target, source, length);
689 target += length;
690 *(target)= GetParity(source + length / 2, ODD, length / 2);
691 }
692
693 // xor two arrays together for len items. The dst array contains the new xored values.
694 void xor(unsigned char *dst, unsigned char *src, size_t len) {
695 for( ; len > 0; len--,dst++,src++)
696 *dst ^= *src;
697 }
698
699 // RotateLeft - Ultralight, Desfire, works on byte level
700 // 00-01-02 >> 01-02-00
701 void rol(uint8_t *data, const size_t len){
702 uint8_t first = data[0];
703 for (size_t i = 0; i < len-1; i++) {
704 data[i] = data[i+1];
705 }
706 data[len-1] = first;
707 }
708
709
710 // Replace unprintable characters with a dot in char buffer
711 void clean_ascii(unsigned char *buf, size_t len) {
712 for (size_t i = 0; i < len; i++) {
713 if (!isprint(buf[i]))
714 buf[i] = '.';
715 }
716 }
717
718 // replace \r \n to \0
719 void strcleanrn(char *buf, size_t len) {
720 strcreplace(buf, len, '\n', '\0');
721 strcreplace(buf, len, '\r', '\0');
722 }
723
724 // replace char in buffer
725 void strcreplace(char *buf, size_t len, char from, char to) {
726 for (size_t i = 0; i < len; i++) {
727 if (buf[i] == from)
728 buf[i] = to;
729 }
730 }
731
732 char *strmcopy(char *buf) {
733 char * str = NULL;
734 if ((str = (char*) malloc(strlen(buf) + 1)) != NULL) {
735 memset(str, 0, strlen(buf) + 1);
736 strcpy(str, buf);
737 }
738 return str;
739 }
740
741
742 // determine number of logical CPU cores (use for multithreaded functions)
743 extern int num_CPUs(void)
744 {
745 #if defined(_WIN32)
746 #include <sysinfoapi.h>
747 SYSTEM_INFO sysinfo;
748 GetSystemInfo(&sysinfo);
749 return sysinfo.dwNumberOfProcessors;
750 #elif defined(__linux__) || defined(__APPLE__)
751 #include <unistd.h>
752 return sysconf(_SC_NPROCESSORS_ONLN);
753 #else
754 return 1;
755 #endif
756 }
757
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