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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 #define MAX_BIN_BREAK_LENGTH (3072+384+1)
13
14 #ifndef _WIN32
15 #include <termios.h>
16 #include <sys/ioctl.h>
17
18 int ukbhit(void)
19 {
20 int cnt = 0;
21 int error;
22 static struct termios Otty, Ntty;
23
24 if ( tcgetattr( 0, &Otty) == -1) return -1;
25 Ntty = Otty;
26
27 Ntty.c_iflag = 0; /* input mode */
28 Ntty.c_oflag = 0; /* output mode */
29 Ntty.c_lflag &= ~ICANON; /* raw mode */
30 Ntty.c_cc[VMIN] = CMIN; /* minimum time to wait */
31 Ntty.c_cc[VTIME] = CTIME; /* minimum characters to wait for */
32
33 if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
34 error += ioctl(0, FIONREAD, &cnt);
35 error += tcsetattr(0, TCSANOW, &Otty);
36 }
37
38 return ( error == 0 ? cnt : -1 );
39 }
40
41 #else
42 #include <conio.h>
43 int ukbhit(void) {
44 return kbhit();
45 }
46 #endif
47
48 // log files functions
49 void AddLogLine(char *file, char *extData, char *c) {
50 FILE *fLog = NULL;
51 char filename[FILE_PATH_SIZE] = {0x00};
52 int len = 0;
53
54 len = strlen(file);
55 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
56 memcpy(filename, file, len);
57
58 fLog = fopen(filename, "a");
59 if (!fLog) {
60 printf("Could not append log file %s", filename);
61 return;
62 }
63
64 fprintf(fLog, "%s", extData);
65 fprintf(fLog, "%s\n", c);
66 fclose(fLog);
67 }
68
69 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
70 AddLogLine(fileName, extData, sprint_hex(data, len));
71 }
72
73 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
74 char buf[100] = {0};
75 sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
76 AddLogLine(fileName, extData, buf);
77 }
78
79 void AddLogCurrentDT(char *fileName) {
80 char buff[20];
81 struct tm *curTime;
82
83 time_t now = time(0);
84 curTime = gmtime(&now);
85
86 strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
87 AddLogLine(fileName, "\nanticollision: ", buff);
88 }
89
90 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
91 char * fnameptr = fileName;
92 memset(fileName, 0x00, 200);
93
94 for (int j = 0; j < byteCount; j++, fnameptr += 2)
95 sprintf(fnameptr, "%02x", uid[j]);
96 sprintf(fnameptr, "%s", ext);
97 }
98
99 // printing and converting functions
100 void print_hex(const uint8_t * data, const size_t len) {
101 size_t i;
102 for (i=0; i < len; ++i)
103 printf("%02x ", data[i]);
104 printf("\n");
105 }
106
107 void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
108
109 int rownum = 0;
110 printf("[%02d] | ", rownum);
111 for (int i = 0; i < len; ++i) {
112
113 printf("%02X ", data[i]);
114
115 // check if a line break is needed
116 if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
117 ++rownum;
118 printf("\n[%02d] | ", rownum);
119 }
120 }
121 printf("\n");
122 }
123
124 char *sprint_hex(const uint8_t *data, const size_t len) {
125
126 int maxLen = ( len > 1024/3) ? 1024/3 : len;
127 static char buf[1024];
128 memset(buf, 0x00, 1024);
129 char * tmp = buf;
130 size_t i;
131
132 for (i=0; i < maxLen; ++i, tmp += 3)
133 sprintf(tmp, "%02X ", data[i]);
134
135 return buf;
136 }
137
138 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
139
140 // make sure we don't go beyond our char array memory
141 size_t in_index = 0, out_index = 0;
142 int max_len;
143 if (breaks==0)
144 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
145 else
146 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
147
148 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
149 //clear memory
150 memset(buf, 0x00, sizeof(buf));
151 char *tmp = buf;
152
153 // loop through the out_index to make sure we don't go too far
154 for (out_index=0; out_index < max_len-2; out_index++) {
155 // set character
156 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
157 // check if a line break is needed and we have room to print it in our array
158 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
159 // increment and print line break
160 out_index++;
161 sprintf(tmp++, "%s","\n");
162 }
163 in_index++;
164 }
165 // last char.
166 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
167 return buf;
168 }
169
170 char *sprint_bin(const uint8_t *data, const size_t len) {
171 return sprint_bin_break(data, len, 0);
172 }
173
174 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
175 static char buf[1024];
176 char *tmp = buf;
177 memset(buf, 0x00, 1024);
178 size_t max_len = (len > 1010) ? 1010 : len;
179 sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);
180 return buf;
181 }
182
183 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
184 {
185 while (len--) {
186 dest[len] = (uint8_t) n;
187 n >>= 8;
188 }
189 }
190
191 uint64_t bytes_to_num(uint8_t* src, size_t len)
192 {
193 uint64_t num = 0;
194 while (len--)
195 {
196 num = (num << 8) | (*src);
197 src++;
198 }
199 return num;
200 }
201
202 // takes a number (uint64_t) and creates a binarray in dest.
203 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
204 while (len--) {
205 dest[len] = n & 1;
206 n >>= 1;
207 }
208 }
209 //least significant bit first
210 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest)
211 {
212 for(int i = 0 ; i < len ; ++i) {
213 dest[i] = n & 1;
214 n >>= 1;
215 }
216 }
217
218
219 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
220 // to
221 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
222 // up to 64 bytes or 512 bits
223 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
224 uint8_t buf[64];
225 memset(buf, 0x00, 64);
226 uint8_t *tmp = buf;
227 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
228 for (size_t i = 0; i < blockSize; i++){
229 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
230 }
231 }
232 return tmp;
233 }
234
235 // takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
236 // returns: the dest array contains the reordered src array.
237 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
238 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
239 for (size_t i = 0; i < blockSize; i++){
240 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
241 }
242 }
243 }
244
245 // -------------------------------------------------------------------------
246 // string parameters lib
247 // -------------------------------------------------------------------------
248
249 // -------------------------------------------------------------------------
250 // line - param line
251 // bg, en - symbol numbers in param line of beginning an ending parameter
252 // paramnum - param number (from 0)
253 // -------------------------------------------------------------------------
254 int param_getptr(const char *line, int *bg, int *en, int paramnum)
255 {
256 int i;
257 int len = strlen(line);
258
259 *bg = 0;
260 *en = 0;
261
262 // skip spaces
263 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
264 if (*bg >= len) {
265 return 1;
266 }
267
268 for (i = 0; i < paramnum; i++) {
269 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
270 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
271
272 if (line[*bg] == '\0') return 1;
273 }
274
275 *en = *bg;
276 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
277
278 (*en)--;
279
280 return 0;
281 }
282
283
284 char param_getchar(const char *line, int paramnum)
285 {
286 int bg, en;
287
288 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
289
290 return line[bg];
291 }
292
293 uint8_t param_get8(const char *line, int paramnum)
294 {
295 return param_get8ex(line, paramnum, 0, 10);
296 }
297
298 /**
299 * @brief Reads a decimal integer (actually, 0-254, not 255)
300 * @param line
301 * @param paramnum
302 * @return -1 if error
303 */
304 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
305 {
306 uint8_t val = param_get8ex(line, paramnum, 255, 10);
307 if( (int8_t) val == -1) return 1;
308 (*destination) = val;
309 return 0;
310 }
311 /**
312 * @brief Checks if param is decimal
313 * @param line
314 * @param paramnum
315 * @return
316 */
317 uint8_t param_isdec(const char *line, int paramnum)
318 {
319 int bg, en;
320 //TODO, check more thorougly
321 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
322 // return strtoul(&line[bg], NULL, 10) & 0xff;
323
324 return 0;
325 }
326
327 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
328 {
329 int bg, en;
330
331 if (!param_getptr(line, &bg, &en, paramnum))
332 return strtoul(&line[bg], NULL, base) & 0xff;
333 else
334 return deflt;
335 }
336
337 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
338 {
339 int bg, en;
340
341 if (!param_getptr(line, &bg, &en, paramnum))
342 return strtoul(&line[bg], NULL, base);
343 else
344 return deflt;
345 }
346
347 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
348 {
349 int bg, en;
350
351 if (!param_getptr(line, &bg, &en, paramnum))
352 return strtoull(&line[bg], NULL, base);
353 else
354 return deflt;
355
356 return 0;
357 }
358
359 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
360 {
361 int bg, en, temp, i;
362
363 if (hexcnt & 1) return 1;
364
365 if (param_getptr(line, &bg, &en, paramnum)) return 1;
366
367 if (en - bg + 1 != hexcnt) return 1;
368
369 for(i = 0; i < hexcnt; i += 2) {
370 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
371
372 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
373 data[i / 2] = temp & 0xff;
374 }
375
376 return 0;
377 }
378 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
379 {
380 int bg, en, temp, i;
381
382 //if (hexcnt % 2)
383 // return 1;
384
385 if (param_getptr(line, &bg, &en, paramnum)) return 1;
386
387 *hexcnt = en - bg + 1;
388 if (*hexcnt % 2) //error if not complete hex bytes
389 return 1;
390
391 for(i = 0; i < *hexcnt; i += 2) {
392 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
393
394 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
395 data[i / 2] = temp & 0xff;
396 }
397
398 return 0;
399 }
400 int param_getstr(const char *line, int paramnum, char * str)
401 {
402 int bg, en;
403
404 if (param_getptr(line, &bg, &en, paramnum)) return 0;
405
406 memcpy(str, line + bg, en - bg + 1);
407 str[en - bg + 1] = 0;
408
409 return en - bg + 1;
410 }
411
412 /*
413 The following methods comes from Rfidler sourcecode.
414 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
415 */
416
417 // convert hex to sequence of 0/1 bit values
418 // returns number of bits converted
419 int hextobinarray(char *target, char *source)
420 {
421 int length, i, count= 0;
422 char x;
423
424 length = strlen(source);
425 // process 4 bits (1 hex digit) at a time
426 while(length--)
427 {
428 x= *(source++);
429 // capitalize
430 if (x >= 'a' && x <= 'f')
431 x -= 32;
432 // convert to numeric value
433 if (x >= '0' && x <= '9')
434 x -= '0';
435 else if (x >= 'A' && x <= 'F')
436 x -= 'A' - 10;
437 else
438 return 0;
439 // output
440 for(i= 0 ; i < 4 ; ++i, ++count)
441 *(target++)= (x >> (3 - i)) & 1;
442 }
443
444 return count;
445 }
446
447 // convert hex to human readable binary string
448 int hextobinstring(char *target, char *source)
449 {
450 int length;
451
452 if(!(length= hextobinarray(target, source)))
453 return 0;
454 binarraytobinstring(target, target, length);
455 return length;
456 }
457
458 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
459 // return number of bits converted
460 int binarraytohex(char *target, char *source, int length)
461 {
462 unsigned char i, x;
463 int j = length;
464
465 if(j % 4)
466 return 0;
467
468 while(j)
469 {
470 for(i= x= 0 ; i < 4 ; ++i)
471 x += ( source[i] << (3 - i));
472 sprintf(target,"%X", x);
473 ++target;
474 source += 4;
475 j -= 4;
476 }
477 return length;
478 }
479
480 // convert binary array to human readable binary
481 void binarraytobinstring(char *target, char *source, int length)
482 {
483 int i;
484
485 for(i= 0 ; i < length ; ++i)
486 *(target++)= *(source++) + '0';
487 *target= '\0';
488 }
489
490 // return parity bit required to match type
491 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
492 {
493 int x;
494 for( x = 0 ; length > 0 ; --length)
495 x += bits[length - 1];
496 x %= 2;
497 return x ^ type;
498 }
499
500 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
501 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
502 {
503 *(target++)= GetParity(source, EVEN, length / 2);
504 memcpy(target, source, length);
505 target += length;
506 *(target)= GetParity(source + length / 2, ODD, length / 2);
507 }
508
509 // xor two arrays together for len items. The dst array contains the new xored values.
510 void xor(unsigned char * dst, unsigned char * src, size_t len) {
511 for( ; len > 0; len--,dst++,src++)
512 *dst ^= *src;
513 }
514
515 int32_t le24toh (uint8_t data[3]) {
516 return (data[2] << 16) | (data[1] << 8) | data[0];
517 }
518
519 // Pack a bitarray into a uint32_t.
520 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
521
522 if (len > 32) return 0;
523
524 int i = start;
525 int j = len-1;
526 uint32_t tmp = 0;
527
528 for (; j >= 0; --j, ++i)
529 tmp |= bits[i] << j;
530
531 return tmp;
532 }
533
534 // RotateLeft - Ultralight, Desfire, works on byte level
535 // 00-01-02 >> 01-02-00
536 void rol(uint8_t *data, const size_t len){
537 uint8_t first = data[0];
538 for (size_t i = 0; i < len-1; i++) {
539 data[i] = data[i+1];
540 }
541 data[len-1] = first;
542 }
543
544 // Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
545 uint32_t SwapBits(uint32_t value, int nrbits) {
546 uint32_t newvalue = 0;
547 for(int i = 0; i < nrbits; i++) {
548 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
549 }
550 return newvalue;
551 }
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