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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 int cnt = 0;
20 int error;
21 static struct termios Otty, Ntty;
22
23 if ( tcgetattr( 0, &Otty) == -1) return -1;
24 Ntty = Otty;
25
26 Ntty.c_iflag = 0; /* input mode */
27 Ntty.c_oflag = 0; /* output mode */
28 Ntty.c_lflag &= ~ICANON; /* raw mode */
29 Ntty.c_cc[VMIN] = CMIN; /* minimum time to wait */
30 Ntty.c_cc[VTIME] = CTIME; /* minimum characters to wait for */
31
32 if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
33 error += ioctl(0, FIONREAD, &cnt);
34 error += tcsetattr(0, TCSANOW, &Otty);
35 }
36
37 return ( error == 0 ? cnt : -1 );
38 }
39
40 #else
41 #include <conio.h>
42 int ukbhit(void) {
43 return kbhit();
44 }
45 #endif
46
47 // log files functions
48 void AddLogLine(char *file, char *extData, char *c) {
49 FILE *f = NULL;
50 char filename[FILE_PATH_SIZE] = {0x00};
51 int len = 0;
52
53 len = strlen(file);
54 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
55 memcpy(filename, file, len);
56
57 f = fopen(filename, "a");
58 if (!f) {
59 printf("Could not append log file %s", filename);
60 return;
61 }
62
63 fprintf(f, "%s", extData);
64 fprintf(f, "%s\n", c);
65 fflush(f);
66 if (f) {
67 fclose(f);
68 f = NULL;
69 }
70 }
71
72 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
73 AddLogLine(fileName, extData, sprint_hex(data, len));
74 }
75
76 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
77 char buf[20] = {0};
78 memset(buf, 0x00, sizeof(buf));
79 //sprintf(buf, "%X%X", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
80 sprintf(buf, "%012"llx"", data);
81 AddLogLine(fileName, extData, buf);
82 }
83
84 void AddLogCurrentDT(char *fileName) {
85 char buf[20];
86 memset(buf, 0x00, sizeof(buf));
87 struct tm *curTime;
88 time_t now = time(0);
89 curTime = gmtime(&now);
90 strftime (buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", curTime);
91 AddLogLine(fileName, "\nanticollision: ", buf);
92 }
93
94 void FillFileNameByUID(char *fileName, uint8_t *uid, char *ext, int byteCount) {
95 if ( fileName == NULL || uid == NULL || ext == NULL ){
96 printf("error: parameter is NULL\n");
97 return;
98 }
99 char * fnameptr = fileName;
100 memset(fileName, 0x00, FILE_PATH_SIZE);
101
102 for (int j = 0; j < byteCount; j++, fnameptr += 2)
103 sprintf(fnameptr, "%02X", uid[j]);
104 sprintf(fnameptr, "%s", ext);
105 }
106
107 // printing and converting functions
108 void print_hex(const uint8_t * data, const size_t len) {
109 size_t i;
110 for (i=0; i < len; ++i)
111 printf("%02x ", data[i]);
112 printf("\n");
113 }
114
115 void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
116
117 int rownum = 0;
118 printf("[%02d] | ", rownum);
119 for (int i = 0; i < len; ++i) {
120
121 printf("%02X ", data[i]);
122
123 // check if a line break is needed
124 if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
125 ++rownum;
126 printf("\n[%02d] | ", rownum);
127 }
128 }
129 printf("\n");
130 }
131
132 char *sprint_hex(const uint8_t *data, const size_t len) {
133
134 int maxLen = ( len > 1024/3) ? 1024/3 : len;
135 static char buf[1024];
136 memset(buf, 0x00, 1024);
137 char * tmp = buf;
138 size_t i;
139
140 for (i=0; i < maxLen; ++i, tmp += 3)
141 sprintf(tmp, "%02X ", data[i]);
142 return buf;
143 }
144
145 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
146
147 // make sure we don't go beyond our char array memory
148 size_t in_index = 0, out_index = 0;
149 int max_len;
150 if (breaks==0)
151 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
152 else
153 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
154
155 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
156 //clear memory
157 memset(buf, 0x00, sizeof(buf));
158 char *tmp = buf;
159
160 // loop through the out_index to make sure we don't go too far
161 for (out_index=0; out_index < max_len-2; out_index++) {
162 // set character
163 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
164 // check if a line break is needed and we have room to print it in our array
165 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
166 // increment and print line break
167 out_index++;
168 sprintf(tmp++, "%s","\n");
169 }
170 in_index++;
171 }
172 // last char.
173 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
174 return buf;
175 }
176
177 char *sprint_bin(const uint8_t *data, const size_t len) {
178 return sprint_bin_break(data, len, 0);
179 }
180
181 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
182 static char buf[1024];
183 char *tmp = buf;
184 memset(buf, 0x00, 1024);
185 size_t max_len = (len > 1010) ? 1010 : len;
186 sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);
187 return buf;
188 }
189
190 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
191 while (len--) {
192 dest[len] = (uint8_t) n;
193 n >>= 8;
194 }
195 }
196
197 uint64_t bytes_to_num(uint8_t* src, size_t len) {
198 uint64_t num = 0;
199 while (len--) {
200 num = (num << 8) | (*src);
201 src++;
202 }
203 return num;
204 }
205
206 // takes a number (uint64_t) and creates a binarray in dest.
207 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
208 while (len--) {
209 dest[len] = n & 1;
210 n >>= 1;
211 }
212 }
213
214 //least significant bit first
215 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
216 for(int i = 0 ; i < len ; ++i) {
217 dest[i] = n & 1;
218 n >>= 1;
219 }
220 }
221
222 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
223 // to
224 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
225 // up to 64 bytes or 512 bits
226 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
227 static uint8_t buf[64];
228 memset(buf, 0x00, 64);
229 uint8_t *tmp = buf;
230 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
231 for (size_t i = 0; i < blockSize; i++){
232 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
233 }
234 }
235 return buf;
236 }
237
238 // takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
239 // returns: the dest array contains the reordered src array.
240 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
241 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
242 for (size_t i = 0; i < blockSize; i++){
243 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
244 }
245 }
246 }
247
248 // -------------------------------------------------------------------------
249 // string parameters lib
250 // -------------------------------------------------------------------------
251
252 // -------------------------------------------------------------------------
253 // line - param line
254 // bg, en - symbol numbers in param line of beginning an ending parameter
255 // paramnum - param number (from 0)
256 // -------------------------------------------------------------------------
257 int param_getptr(const char *line, int *bg, int *en, int paramnum)
258 {
259 int i;
260 int len = strlen(line);
261
262 *bg = 0;
263 *en = 0;
264
265 // skip spaces
266 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
267 if (*bg >= len) {
268 return 1;
269 }
270
271 for (i = 0; i < paramnum; i++) {
272 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
273 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
274
275 if (line[*bg] == '\0') return 1;
276 }
277
278 *en = *bg;
279 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
280
281 (*en)--;
282
283 return 0;
284 }
285
286 char param_getchar(const char *line, int paramnum)
287 {
288 int bg, en;
289
290 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
291
292 return line[bg];
293 }
294
295 uint8_t param_get8(const char *line, int paramnum)
296 {
297 return param_get8ex(line, paramnum, 0, 10);
298 }
299
300 /**
301 * @brief Reads a decimal integer (actually, 0-254, not 255)
302 * @param line
303 * @param paramnum
304 * @return -1 if error
305 */
306 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
307 {
308 uint8_t val = param_get8ex(line, paramnum, 255, 10);
309 if( (int8_t) val == -1) return 1;
310 (*destination) = val;
311 return 0;
312 }
313 /**
314 * @brief Checks if param is decimal
315 * @param line
316 * @param paramnum
317 * @return
318 */
319 uint8_t param_isdec(const char *line, int paramnum)
320 {
321 int bg, en;
322 //TODO, check more thorougly
323 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
324 // return strtoul(&line[bg], NULL, 10) & 0xff;
325
326 return 0;
327 }
328
329 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
330 {
331 int bg, en;
332
333 if (!param_getptr(line, &bg, &en, paramnum))
334 return strtoul(&line[bg], NULL, base) & 0xff;
335 else
336 return deflt;
337 }
338
339 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
340 {
341 int bg, en;
342
343 if (!param_getptr(line, &bg, &en, paramnum))
344 return strtoul(&line[bg], NULL, base);
345 else
346 return deflt;
347 }
348
349 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
350 {
351 int bg, en;
352
353 if (!param_getptr(line, &bg, &en, paramnum))
354 return strtoull(&line[bg], NULL, base);
355 else
356 return deflt;
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 uint32_t le32toh (uint8_t *data) {
519 return (uint32_t)( (data[3]<<24) | (data[2]<<16) | (data[1]<<8) | data[0]);
520 }
521 // Pack a bitarray into a uint32_t.
522 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
523
524 if (len > 32) return 0;
525
526 int i = start;
527 int j = len-1;
528 uint32_t tmp = 0;
529
530 for (; j >= 0; --j, ++i)
531 tmp |= bits[i] << j;
532
533 return tmp;
534 }
535
536 // RotateLeft - Ultralight, Desfire, works on byte level
537 // 00-01-02 >> 01-02-00
538 void rol(uint8_t *data, const size_t len){
539 uint8_t first = data[0];
540 for (size_t i = 0; i < len-1; i++) {
541 data[i] = data[i+1];
542 }
543 data[len-1] = first;
544 }
545
546 // Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
547 // And clears the rest of the bits.
548 uint32_t SwapBits(uint32_t value, int nrbits) {
549 uint32_t newvalue = 0;
550 for(int i = 0; i < nrbits; i++) {
551 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
552 }
553 return newvalue;
554 }
555 /*
556 ref http://www.csm.ornl.gov/~dunigan/crc.html
557 Returns the value v with the bottom b [0,32] bits reflected.
558 Example: reflect(0x3e23L,3) == 0x3e26
559 */
560 uint32_t reflect(uint32_t v, int b) {
561 uint32_t t = v;
562 for ( int i = 0; i < b; ++i) {
563 if (t & 1)
564 v |= BITMASK((b-1)-i);
565 else
566 v &= ~BITMASK((b-1)-i);
567 t>>=1;
568 }
569 return v;
570 }
571
572 uint64_t HornerScheme(uint64_t num, uint64_t divider, uint64_t factor) {
573 uint64_t remainder=0, quotient=0, result=0;
574 remainder = num % divider;
575 quotient = num / divider;
576 if(!(quotient == 0 && remainder == 0))
577 result += HornerScheme(quotient, divider, factor) * factor + remainder;
578 return result;
579 }
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