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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 <ctype.h>
12 #include "util.h"
13 #define MAX_BIN_BREAK_LENGTH (3072+384+1)
14
15 #ifndef _WIN32
16 #include <termios.h>
17 #include <sys/ioctl.h>
18
19
20 int ukbhit(void)
21 {
22 int cnt = 0;
23 int error;
24 static struct termios Otty, Ntty;
25
26
27 if ( tcgetattr( 0, &Otty) == -1 ) return -1;
28 Ntty = Otty;
29
30 Ntty.c_iflag = 0; /* input mode */
31 Ntty.c_oflag = 0; /* output mode */
32 Ntty.c_lflag &= ~ICANON; /* raw mode */
33 Ntty.c_cc[VMIN] = CMIN; /* minimum time to wait */
34 Ntty.c_cc[VTIME] = CTIME; /* minimum characters to wait for */
35
36 if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
37 error += ioctl(0, FIONREAD, &cnt);
38 error += tcsetattr(0, TCSANOW, &Otty);
39 }
40
41 return ( error == 0 ? cnt : -1 );
42 }
43
44 #else
45 #include <conio.h>
46 int ukbhit(void) {
47 return kbhit();
48 }
49 #endif
50
51 // log files functions
52 void AddLogLine(char *file, char *extData, char *c) {
53 FILE *fLog = NULL;
54 char filename[FILE_PATH_SIZE] = {0x00};
55 int len = 0;
56
57 len = strlen(file);
58 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
59 memcpy(filename, file, len);
60
61 fLog = fopen(filename, "a");
62 if (!fLog) {
63 printf("Could not append log file %s", filename);
64 return;
65 }
66
67 fprintf(fLog, "%s", extData);
68 fprintf(fLog, "%s\n", c);
69 fclose(fLog);
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[100] = {0};
78 sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
79 AddLogLine(fileName, extData, buf);
80 }
81
82 void AddLogCurrentDT(char *fileName) {
83 char buff[20];
84 struct tm *curTime;
85
86 time_t now = time(0);
87 curTime = gmtime(&now);
88
89 strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
90 AddLogLine(fileName, "\nanticollision: ", buff);
91 }
92
93 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
94 char * fnameptr = fileName;
95 memset(fileName, 0x00, 200);
96
97 for (int j = 0; j < byteCount; j++, fnameptr += 2)
98 sprintf(fnameptr, "%02x", (unsigned int) uid[j]);
99 sprintf(fnameptr, "%s", ext);
100 }
101
102 // printing and converting functions
103
104 void print_hex(const uint8_t * data, const size_t len)
105 {
106 size_t i;
107
108 for (i=0; i < len; i++)
109 printf("%02x ", data[i]);
110
111 printf("\n");
112 }
113
114 void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
115
116 int rownum = 0;
117 printf("[%02d] | ", rownum);
118 for (int i = 0; i < len; ++i) {
119
120 printf("%02X ", data[i]);
121
122 // check if a line break is needed
123 if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
124 ++rownum;
125 printf("\n[%02d] | ", rownum);
126 }
127 }
128 printf("\n");
129 }
130
131 char *sprint_hex(const uint8_t *data, const size_t len) {
132
133 int maxLen = ( len > 1024/3) ? 1024/3 : len;
134 static char buf[1024];
135 memset(buf, 0x00, 1024);
136 char *tmp = buf;
137 size_t i;
138
139 for (i=0; i < maxLen; ++i, tmp += 3)
140 sprintf(tmp, "%02x ", (unsigned int) data[i]);
141
142 return buf;
143 }
144
145 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
146 // make sure we don't go beyond our char array memory
147 int max_len;
148 if (breaks==0)
149 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
150 else
151 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
152
153 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
154 //clear memory
155 memset(buf, 0x00, sizeof(buf));
156 char *tmp = buf;
157
158 size_t in_index = 0;
159 // loop through the out_index to make sure we don't go too far
160 for (size_t out_index=0; out_index < max_len-1; out_index++) {
161 // set character - (should be binary but verify it isn't more than 1 digit)
162 if (data[in_index]<10)
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
173 return buf;
174 }
175
176 char *sprint_bin(const uint8_t *data, const size_t len) {
177 return sprint_bin_break(data, len, 0);
178 }
179
180 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
181 static char buf[1024];
182 char *tmp = buf;
183 memset(buf, 0x00, 1024);
184 size_t max_len = (len > 1010) ? 1010 : len;
185
186 sprintf(tmp, "%s| ", sprint_hex(data, max_len) );
187
188 size_t i = 0;
189 size_t pos = (max_len * 3)+2;
190 while(i < max_len){
191 char c = data[i];
192 if ( (c < 32) || (c == 127))
193 c = '.';
194 sprintf(tmp+pos+i, "%c", c);
195 ++i;
196 }
197 return buf;
198 }
199
200 char *sprint_ascii(const uint8_t *data, const size_t len) {
201 static char buf[1024];
202 char *tmp = buf;
203 memset(buf, 0x00, 1024);
204 size_t max_len = (len > 1010) ? 1010 : len;
205 size_t i = 0;
206 while(i < max_len){
207 char c = data[i];
208 tmp[i] = ((c < 32) || (c == 127)) ? '.' : c;
209 ++i;
210 }
211 return buf;
212 }
213
214 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
215 {
216 while (len--) {
217 dest[len] = (uint8_t) n;
218 n >>= 8;
219 }
220 }
221
222 uint64_t bytes_to_num(uint8_t* src, size_t len)
223 {
224 uint64_t num = 0;
225 while (len--)
226 {
227 num = (num << 8) | (*src);
228 src++;
229 }
230 return num;
231 }
232
233 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
234 while (len--) {
235 dest[len] = n & 1;
236 n >>= 1;
237 }
238 }
239
240 //least significant bit first
241 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
242 for(int i = 0 ; i < len ; ++i) {
243 dest[i] = n & 1;
244 n >>= 1;
245 }
246 }
247
248
249 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
250 // to
251 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
252 // up to 64 bytes or 512 bits
253 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
254 static uint8_t buf[64];
255 memset(buf, 0x00, 64);
256 uint8_t *tmp = buf;
257 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
258 for (size_t i = 0; i < blockSize; i++){
259 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
260 }
261 }
262 return tmp;
263 }
264
265 // takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
266 // returns: the dest array contains the reordered src array.
267 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
268 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
269 for (size_t i = 0; i < blockSize; i++){
270 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
271 }
272 }
273 }
274
275 //assumes little endian
276 char * printBits(size_t const size, void const * const ptr)
277 {
278 unsigned char *b = (unsigned char*) ptr;
279 unsigned char byte;
280 static char buf[1024];
281 char * tmp = buf;
282 int i, j;
283
284 for (i=size-1;i>=0;i--)
285 {
286 for (j=7;j>=0;j--)
287 {
288 byte = b[i] & (1<<j);
289 byte >>= j;
290 sprintf(tmp, "%u", (unsigned int)byte);
291 tmp++;
292 }
293 }
294 return buf;
295 }
296
297 // -------------------------------------------------------------------------
298 // string parameters lib
299 // -------------------------------------------------------------------------
300
301 // -------------------------------------------------------------------------
302 // line - param line
303 // bg, en - symbol numbers in param line of beginning an ending parameter
304 // paramnum - param number (from 0)
305 // -------------------------------------------------------------------------
306 int param_getptr(const char *line, int *bg, int *en, int paramnum)
307 {
308 int i;
309 int len = strlen(line);
310
311 *bg = 0;
312 *en = 0;
313
314 // skip spaces
315 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
316 if (*bg >= len) {
317 return 1;
318 }
319
320 for (i = 0; i < paramnum; i++) {
321 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
322 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
323
324 if (line[*bg] == '\0') return 1;
325 }
326
327 *en = *bg;
328 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
329
330 (*en)--;
331
332 return 0;
333 }
334
335
336 char param_getchar(const char *line, int paramnum)
337 {
338 int bg, en;
339
340 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
341
342 return line[bg];
343 }
344
345 uint8_t param_get8(const char *line, int paramnum)
346 {
347 return param_get8ex(line, paramnum, 0, 10);
348 }
349
350 /**
351 * @brief Reads a decimal integer (actually, 0-254, not 255)
352 * @param line
353 * @param paramnum
354 * @return -1 if error
355 */
356 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
357 {
358 uint8_t val = param_get8ex(line, paramnum, 255, 10);
359 if( (int8_t) val == -1) return 1;
360 (*destination) = val;
361 return 0;
362 }
363 /**
364 * @brief Checks if param is decimal
365 * @param line
366 * @param paramnum
367 * @return
368 */
369 uint8_t param_isdec(const char *line, int paramnum)
370 {
371 int bg, en;
372 //TODO, check more thorougly
373 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
374 // return strtoul(&line[bg], NULL, 10) & 0xff;
375
376 return 0;
377 }
378
379 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
380 {
381 int bg, en;
382
383 if (!param_getptr(line, &bg, &en, paramnum))
384 return strtoul(&line[bg], NULL, base) & 0xff;
385 else
386 return deflt;
387 }
388
389 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
390 {
391 int bg, en;
392
393 if (!param_getptr(line, &bg, &en, paramnum))
394 return strtoul(&line[bg], NULL, base);
395 else
396 return deflt;
397 }
398
399 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
400 {
401 int bg, en;
402
403 if (!param_getptr(line, &bg, &en, paramnum))
404 return strtoull(&line[bg], NULL, base);
405 else
406 return deflt;
407 }
408
409 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
410 {
411 int bg, en, temp, i;
412
413 if (hexcnt % 2)
414 return 1;
415
416 if (param_getptr(line, &bg, &en, paramnum)) return 1;
417
418 if (en - bg + 1 != hexcnt)
419 return 1;
420
421 for(i = 0; i < hexcnt; i += 2) {
422 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
423
424 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
425 data[i / 2] = temp & 0xff;
426 }
427
428 return 0;
429 }
430 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
431 {
432 int bg, en, temp, i;
433
434 //if (hexcnt % 2)
435 // return 1;
436
437 if (param_getptr(line, &bg, &en, paramnum)) return 1;
438
439 *hexcnt = en - bg + 1;
440 if (*hexcnt % 2) //error if not complete hex bytes
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_getstr(const char *line, int paramnum, char * str)
453 {
454 int bg, en;
455
456 if (param_getptr(line, &bg, &en, paramnum)) return 0;
457
458 memcpy(str, line + bg, en - bg + 1);
459 str[en - bg + 1] = 0;
460
461 return en - bg + 1;
462 }
463
464 /*
465 The following methods comes from Rfidler sourcecode.
466 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
467 */
468
469 // convert hex to sequence of 0/1 bit values
470 // returns number of bits converted
471 int hextobinarray(char *target, char *source)
472 {
473 int length, i, count= 0;
474 char x;
475
476 length = strlen(source);
477 // process 4 bits (1 hex digit) at a time
478 while(length--)
479 {
480 x= *(source++);
481 // capitalize
482 if (x >= 'a' && x <= 'f')
483 x -= 32;
484 // convert to numeric value
485 if (x >= '0' && x <= '9')
486 x -= '0';
487 else if (x >= 'A' && x <= 'F')
488 x -= 'A' - 10;
489 else
490 return 0;
491 // output
492 for(i= 0 ; i < 4 ; ++i, ++count)
493 *(target++)= (x >> (3 - i)) & 1;
494 }
495
496 return count;
497 }
498
499 // convert hex to human readable binary string
500 int hextobinstring(char *target, char *source)
501 {
502 int length;
503
504 if(!(length= hextobinarray(target, source)))
505 return 0;
506 binarraytobinstring(target, target, length);
507 return length;
508 }
509
510 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
511 // return number of bits converted
512 int binarraytohex(char *target,char *source, int length)
513 {
514 unsigned char i, x;
515 int j = length;
516
517 if(j % 4)
518 return 0;
519
520 while(j)
521 {
522 for(i= x= 0 ; i < 4 ; ++i)
523 x += ( source[i] << (3 - i));
524 sprintf(target,"%X", (unsigned int)x);
525 ++target;
526 source += 4;
527 j -= 4;
528 }
529 return length;
530 }
531
532 // convert binary array to human readable binary
533 void binarraytobinstring(char *target, char *source, int length)
534 {
535 int i;
536
537 for(i= 0 ; i < length ; ++i)
538 *(target++)= *(source++) + '0';
539 *target= '\0';
540 }
541
542 // return parity bit required to match type
543 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
544 {
545 int x;
546
547 for(x= 0 ; length > 0 ; --length)
548 x += bits[length - 1];
549 x %= 2;
550
551 return x ^ type;
552 }
553
554 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
555 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
556 {
557 *(target++)= GetParity(source, EVEN, length / 2);
558 memcpy(target, source, length);
559 target += length;
560 *(target)= GetParity(source + length / 2, ODD, length / 2);
561 }
562
563 // xor two arrays together for len items. The dst array contains the new xored values.
564 void xor(unsigned char *dst, unsigned char *src, size_t len) {
565 for( ; len > 0; len--,dst++,src++)
566 *dst ^= *src;
567 }
568
569 int32_t le24toh (uint8_t data[3]) {
570 return (data[2] << 16) | (data[1] << 8) | data[0];
571 }
572 uint32_t le32toh (uint8_t *data) {
573 return (uint32_t)( (data[3]<<24) | (data[2]<<16) | (data[1]<<8) | data[0]);
574 }
575
576 // RotateLeft - Ultralight, Desfire, works on byte level
577 // 00-01-02 >> 01-02-00
578 void rol(uint8_t *data, const size_t len){
579 uint8_t first = data[0];
580 for (size_t i = 0; i < len-1; i++) {
581 data[i] = data[i+1];
582 }
583 data[len-1] = first;
584 }
585
586
587 // Replace unprintable characters with a dot in char buffer
588 void clean_ascii(unsigned char *buf, size_t len) {
589 for (size_t i = 0; i < len; i++) {
590 if (!isprint(buf[i]))
591 buf[i] = '.';
592 }
593 }
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