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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 "data.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 #else
56
57 #include <conio.h>
58 int ukbhit(void) {
59 return kbhit();
60 }
61 #endif
62
63 // log files functions
64 void AddLogLine(char *file, char *extData, char *c) {
65 FILE *fLog = NULL;
66 char filename[FILE_PATH_SIZE] = {0x00};
67 int len = 0;
68
69 len = strlen(file);
70 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
71 memcpy(filename, file, len);
72
73 fLog = fopen(filename, "a");
74 if (!fLog) {
75 printf("Could not append log file %s", filename);
76 return;
77 }
78
79 fprintf(fLog, "%s", extData);
80 fprintf(fLog, "%s\n", c);
81 fclose(fLog);
82 }
83
84 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
85 AddLogLine(fileName, extData, sprint_hex(data, len));
86 }
87
88 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
89 char buf[100] = {0};
90 sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
91 AddLogLine(fileName, extData, buf);
92 }
93
94 void AddLogCurrentDT(char *fileName) {
95 char buff[20];
96 struct tm *curTime;
97
98 time_t now = time(0);
99 curTime = gmtime(&now);
100
101 strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
102 AddLogLine(fileName, "\nanticollision: ", buff);
103 }
104
105 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
106 char * fnameptr = fileName;
107 memset(fileName, 0x00, 200);
108
109 for (int j = 0; j < byteCount; j++, fnameptr += 2)
110 sprintf(fnameptr, "%02x", (unsigned int) uid[j]);
111 sprintf(fnameptr, "%s", ext);
112 }
113
114 // printing and converting functions
115
116 void print_hex(const uint8_t * data, const size_t len)
117 {
118 size_t i;
119
120 for (i=0; i < len; i++)
121 printf("%02x ", data[i]);
122
123 printf("\n");
124 }
125
126 void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
127
128 int rownum = 0;
129 printf("[%02d] | ", rownum);
130 for (int i = 0; i < len; ++i) {
131
132 printf("%02X ", data[i]);
133
134 // check if a line break is needed
135 if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
136 ++rownum;
137 printf("\n[%02d] | ", rownum);
138 }
139 }
140 printf("\n");
141 }
142
143 char *sprint_hex(const uint8_t *data, const size_t len) {
144
145 int maxLen = ( len > 1024/3) ? 1024/3 : len;
146 static char buf[1024];
147 memset(buf, 0x00, 1024);
148 char *tmp = buf;
149 size_t i;
150
151 for (i=0; i < maxLen; ++i, tmp += 3)
152 sprintf(tmp, "%02x ", (unsigned int) data[i]);
153
154 return buf;
155 }
156
157 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
158 // make sure we don't go beyond our char array memory
159 int max_len;
160 if (breaks==0)
161 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
162 else
163 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
164
165 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
166 //clear memory
167 memset(buf, 0x00, sizeof(buf));
168 char *tmp = buf;
169
170 size_t in_index = 0;
171 // loop through the out_index to make sure we don't go too far
172 for (size_t out_index=0; out_index < max_len; out_index++) {
173 // set character - (should be binary but verify it isn't more than 1 digit)
174 if (data[in_index]<10)
175 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
176 // check if a line break is needed and we have room to print it in our array
177 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 < max_len) ) {
178 // increment and print line break
179 out_index++;
180 sprintf(tmp++, "%s","\n");
181 }
182 in_index++;
183 }
184
185 return buf;
186 }
187
188 char *sprint_bin(const uint8_t *data, const size_t len) {
189 return sprint_bin_break(data, len, 0);
190 }
191
192 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
193 static char buf[1024];
194 char *tmp = buf;
195 memset(buf, 0x00, 1024);
196 size_t max_len = (len > 255) ? 255 : len;
197 // max 255 bytes * 3 + 2 characters = 767 in buffer
198 sprintf(tmp, "%s| ", sprint_hex(data, max_len) );
199
200 size_t i = 0;
201 size_t pos = (max_len * 3)+2;
202 // add another 255 characters ascii = 1020 characters of buffer used
203 while(i < max_len) {
204 char c = data[i];
205 if ( (c < 32) || (c == 127))
206 c = '.';
207 sprintf(tmp+pos+i, "%c", c);
208 ++i;
209 }
210 return buf;
211 }
212
213 char *sprint_ascii(const uint8_t *data, const size_t len) {
214 static char buf[1024];
215 char *tmp = buf;
216 memset(buf, 0x00, 1024);
217 size_t max_len = (len > 1010) ? 1010 : len;
218 size_t i = 0;
219 while(i < max_len){
220 char c = data[i];
221 tmp[i] = ((c < 32) || (c == 127)) ? '.' : c;
222 ++i;
223 }
224 return buf;
225 }
226
227 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
228 {
229 while (len--) {
230 dest[len] = (uint8_t) n;
231 n >>= 8;
232 }
233 }
234
235 uint64_t bytes_to_num(uint8_t* src, size_t len)
236 {
237 uint64_t num = 0;
238 while (len--)
239 {
240 num = (num << 8) | (*src);
241 src++;
242 }
243 return num;
244 }
245
246 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
247 while (len--) {
248 dest[len] = n & 1;
249 n >>= 1;
250 }
251 }
252
253 //least significant bit first
254 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
255 for(int i = 0 ; i < len ; ++i) {
256 dest[i] = n & 1;
257 n >>= 1;
258 }
259 }
260
261 // Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
262 // And clears the rest of the bits.
263 uint32_t SwapBits(uint32_t value, int nrbits) {
264 uint32_t newvalue = 0;
265 for(int i = 0; i < nrbits; i++) {
266 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
267 }
268 return newvalue;
269 }
270
271 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
272 // to
273 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
274 // up to 64 bytes or 512 bits
275 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
276 static uint8_t buf[64];
277 memset(buf, 0x00, 64);
278 uint8_t *tmp = buf;
279 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
280 for (size_t i = 0; i < blockSize; i++){
281 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
282 }
283 }
284 return tmp;
285 }
286
287 // takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
288 // returns: the dest array contains the reordered src array.
289 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
290 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
291 for (size_t i = 0; i < blockSize; i++){
292 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
293 }
294 }
295 }
296
297 //assumes little endian
298 char * printBits(size_t const size, void const * const ptr)
299 {
300 unsigned char *b = (unsigned char*) ptr;
301 unsigned char byte;
302 static char buf[1024];
303 char * tmp = buf;
304 int i, j;
305
306 for (i=size-1;i>=0;i--)
307 {
308 for (j=7;j>=0;j--)
309 {
310 byte = b[i] & (1<<j);
311 byte >>= j;
312 sprintf(tmp, "%u", (unsigned int)byte);
313 tmp++;
314 }
315 }
316 return buf;
317 }
318
319 // -------------------------------------------------------------------------
320 // string parameters lib
321 // -------------------------------------------------------------------------
322
323 // -------------------------------------------------------------------------
324 // line - param line
325 // bg, en - symbol numbers in param line of beginning an ending parameter
326 // paramnum - param number (from 0)
327 // -------------------------------------------------------------------------
328 int param_getptr(const char *line, int *bg, int *en, int paramnum)
329 {
330 int i;
331 int len = strlen(line);
332
333 *bg = 0;
334 *en = 0;
335
336 // skip spaces
337 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
338 if (*bg >= len) {
339 return 1;
340 }
341
342 for (i = 0; i < paramnum; i++) {
343 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
344 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
345
346 if (line[*bg] == '\0') return 1;
347 }
348
349 *en = *bg;
350 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
351
352 (*en)--;
353
354 return 0;
355 }
356
357
358 char param_getchar(const char *line, int paramnum)
359 {
360 int bg, en;
361
362 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
363
364 return line[bg];
365 }
366
367 uint8_t param_get8(const char *line, int paramnum)
368 {
369 return param_get8ex(line, paramnum, 0, 10);
370 }
371
372 /**
373 * @brief Reads a decimal integer (actually, 0-254, not 255)
374 * @param line
375 * @param paramnum
376 * @return -1 if error
377 */
378 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
379 {
380 uint8_t val = param_get8ex(line, paramnum, 255, 10);
381 if( (int8_t) val == -1) return 1;
382 (*destination) = val;
383 return 0;
384 }
385 /**
386 * @brief Checks if param is decimal
387 * @param line
388 * @param paramnum
389 * @return
390 */
391 uint8_t param_isdec(const char *line, int paramnum)
392 {
393 int bg, en;
394 //TODO, check more thorougly
395 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
396 // return strtoul(&line[bg], NULL, 10) & 0xff;
397
398 return 0;
399 }
400
401 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
402 {
403 int bg, en;
404
405 if (!param_getptr(line, &bg, &en, paramnum))
406 return strtoul(&line[bg], NULL, base) & 0xff;
407 else
408 return deflt;
409 }
410
411 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
412 {
413 int bg, en;
414
415 if (!param_getptr(line, &bg, &en, paramnum))
416 return strtoul(&line[bg], NULL, base);
417 else
418 return deflt;
419 }
420
421 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
422 {
423 int bg, en;
424
425 if (!param_getptr(line, &bg, &en, paramnum))
426 return strtoull(&line[bg], NULL, base);
427 else
428 return deflt;
429 }
430
431 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
432 {
433 int bg, en, temp, i;
434
435 if (hexcnt % 2)
436 return 1;
437
438 if (param_getptr(line, &bg, &en, paramnum)) return 1;
439
440 if (en - bg + 1 != hexcnt)
441 return 1;
442
443 for(i = 0; i < hexcnt; i += 2) {
444 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
445
446 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
447 data[i / 2] = temp & 0xff;
448 }
449
450 return 0;
451 }
452 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
453 {
454 int bg, en, temp, i;
455
456 //if (hexcnt % 2)
457 // return 1;
458
459 if (param_getptr(line, &bg, &en, paramnum)) return 1;
460
461 *hexcnt = en - bg + 1;
462 if (*hexcnt % 2) //error if not complete hex bytes
463 return 1;
464
465 for(i = 0; i < *hexcnt; i += 2) {
466 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
467
468 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
469 data[i / 2] = temp & 0xff;
470 }
471
472 return 0;
473 }
474 int param_getstr(const char *line, int paramnum, char * str)
475 {
476 int bg, en;
477
478 if (param_getptr(line, &bg, &en, paramnum)) return 0;
479
480 memcpy(str, line + bg, en - bg + 1);
481 str[en - bg + 1] = 0;
482
483 return en - bg + 1;
484 }
485
486 /*
487 The following methods comes from Rfidler sourcecode.
488 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
489 */
490
491 // convert hex to sequence of 0/1 bit values
492 // returns number of bits converted
493 int hextobinarray(char *target, char *source)
494 {
495 int length, i, count= 0;
496 char x;
497
498 length = strlen(source);
499 // process 4 bits (1 hex digit) at a time
500 while(length--)
501 {
502 x= *(source++);
503 // capitalize
504 if (x >= 'a' && x <= 'f')
505 x -= 32;
506 // convert to numeric value
507 if (x >= '0' && x <= '9')
508 x -= '0';
509 else if (x >= 'A' && x <= 'F')
510 x -= 'A' - 10;
511 else
512 return 0;
513 // output
514 for(i= 0 ; i < 4 ; ++i, ++count)
515 *(target++)= (x >> (3 - i)) & 1;
516 }
517
518 return count;
519 }
520
521 // convert hex to human readable binary string
522 int hextobinstring(char *target, char *source)
523 {
524 int length;
525
526 if(!(length= hextobinarray(target, source)))
527 return 0;
528 binarraytobinstring(target, target, length);
529 return length;
530 }
531
532 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
533 // return number of bits converted
534 int binarraytohex(char *target,char *source, int length)
535 {
536 unsigned char i, x;
537 int j = length;
538
539 if(j % 4)
540 return 0;
541
542 while(j)
543 {
544 for(i= x= 0 ; i < 4 ; ++i)
545 x += ( source[i] << (3 - i));
546 sprintf(target,"%X", (unsigned int)x);
547 ++target;
548 source += 4;
549 j -= 4;
550 }
551 return length;
552 }
553
554 // convert binary array to human readable binary
555 void binarraytobinstring(char *target, char *source, int length)
556 {
557 int i;
558
559 for(i= 0 ; i < length ; ++i)
560 *(target++)= *(source++) + '0';
561 *target= '\0';
562 }
563
564 // return parity bit required to match type
565 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
566 {
567 int x;
568
569 for(x= 0 ; length > 0 ; --length)
570 x += bits[length - 1];
571 x %= 2;
572
573 return x ^ type;
574 }
575
576 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
577 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
578 {
579 *(target++)= GetParity(source, EVEN, length / 2);
580 memcpy(target, source, length);
581 target += length;
582 *(target)= GetParity(source + length / 2, ODD, length / 2);
583 }
584
585 // xor two arrays together for len items. The dst array contains the new xored values.
586 void xor(unsigned char *dst, unsigned char *src, size_t len) {
587 for( ; len > 0; len--,dst++,src++)
588 *dst ^= *src;
589 }
590
591 int32_t le24toh (uint8_t data[3]) {
592 return (data[2] << 16) | (data[1] << 8) | data[0];
593 }
594 uint32_t le32toh (uint8_t *data) {
595 return (uint32_t)( (data[3]<<24) | (data[2]<<16) | (data[1]<<8) | data[0]);
596 }
597
598 // RotateLeft - Ultralight, Desfire, works on byte level
599 // 00-01-02 >> 01-02-00
600 void rol(uint8_t *data, const size_t len){
601 uint8_t first = data[0];
602 for (size_t i = 0; i < len-1; i++) {
603 data[i] = data[i+1];
604 }
605 data[len-1] = first;
606 }
607
608
609 // Replace unprintable characters with a dot in char buffer
610 void clean_ascii(unsigned char *buf, size_t len) {
611 for (size_t i = 0; i < len; i++) {
612 if (!isprint(buf[i]))
613 buf[i] = '.';
614 }
615 }
616
617
618
619
620 // determine number of logical CPU cores (use for multithreaded functions)
621 extern int num_CPUs(void)
622 {
623 #if defined(_WIN32)
624 #include <sysinfoapi.h>
625 SYSTEM_INFO sysinfo;
626 GetSystemInfo(&sysinfo);
627 return sysinfo.dwNumberOfProcessors;
628 #elif defined(__linux__) || defined(__APPLE__)
629 #include <unistd.h>
630 return sysconf(_SC_NPROCESSORS_ONLN);
631 #else
632 return 1;
633 #endif
634 }
635
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