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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
19 int ukbhit(void)
20 {
21 int cnt = 0;
22 int error;
23 static struct termios Otty, Ntty;
24
25
26 tcgetattr( 0, &Otty);
27 Ntty = Otty;
28
29 Ntty.c_iflag = 0; /* input mode */
30 Ntty.c_oflag = 0; /* output mode */
31 Ntty.c_lflag &= ~ICANON; /* raw mode */
32 Ntty.c_cc[VMIN] = CMIN; /* minimum time to wait */
33 Ntty.c_cc[VTIME] = CTIME; /* minimum characters to wait for */
34
35 if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
36 error += ioctl(0, FIONREAD, &cnt);
37 error += tcsetattr(0, TCSANOW, &Otty);
38 }
39
40 return ( error == 0 ? cnt : -1 );
41 }
42
43 #else
44 #include <conio.h>
45 int ukbhit(void) {
46 return kbhit();
47 }
48 #endif
49
50 // log files functions
51 void AddLogLine(char *file, char *extData, char *c) {
52 FILE *fLog = NULL;
53 char filename[FILE_PATH_SIZE] = {0x00};
54 int len = 0;
55
56 len = strlen(file);
57 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
58 memcpy(filename, file, len);
59
60 fLog = fopen(filename, "a");
61 if (!fLog) {
62 printf("Could not append log file %s", filename);
63 return;
64 }
65
66 fprintf(fLog, "%s", extData);
67 fprintf(fLog, "%s\n", c);
68 fclose(fLog);
69 }
70
71 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
72 AddLogLine(fileName, extData, sprint_hex(data, len));
73 }
74
75 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
76 char buf[100] = {0};
77 sprintf(buf, "%x%x", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
78 AddLogLine(fileName, extData, buf);
79 }
80
81 void AddLogCurrentDT(char *fileName) {
82 char buff[20];
83 struct tm *curTime;
84
85 time_t now = time(0);
86 curTime = gmtime(&now);
87
88 strftime (buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", curTime);
89 AddLogLine(fileName, "\nanticollision: ", buff);
90 }
91
92 void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
93 char * fnameptr = fileName;
94 memset(fileName, 0x00, 200);
95
96 for (int j = 0; j < byteCount; j++, fnameptr += 2)
97 sprintf(fnameptr, "%02x", uid[j]);
98 sprintf(fnameptr, "%s", ext);
99 }
100
101 // printing and converting functions
102
103 void print_hex(const uint8_t * data, const size_t len)
104 {
105 size_t i;
106
107 for (i=0; i < len; i++)
108 printf("%02x ", data[i]);
109
110 printf("\n");
111 }
112
113 char *sprint_hex(const uint8_t *data, const size_t len) {
114
115 int maxLen = ( len > 1024/3) ? 1024/3 : len;
116 static char buf[1024];
117 memset(buf, 0x00, 1024);
118 char *tmp = buf;
119 size_t i;
120
121 for (i=0; i < maxLen; ++i, tmp += 3)
122 sprintf(tmp, "%02x ", data[i]);
123
124 return buf;
125 }
126
127 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
128 // make sure we don't go beyond our char array memory
129 int max_len;
130 if (breaks==0)
131 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
132 else
133 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
134
135 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
136 //clear memory
137 memset(buf, 0x00, sizeof(buf));
138 char *tmp = buf;
139
140 size_t in_index = 0;
141 // loop through the out_index to make sure we don't go too far
142 for (size_t out_index=0; out_index < max_len; out_index++) {
143 // set character
144 sprintf(tmp++, "%u", data[in_index]);
145 // check if a line break is needed and we have room to print it in our array
146 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
147 // increment and print line break
148 out_index++;
149 sprintf(tmp++, "%s","\n");
150 }
151 in_index++;
152 }
153
154 return buf;
155 }
156
157 char *sprint_bin(const uint8_t *data, const size_t len) {
158 return sprint_bin_break(data, len, 0);
159 }
160 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
161 {
162 while (len--) {
163 dest[len] = (uint8_t) n;
164 n >>= 8;
165 }
166 }
167
168 uint64_t bytes_to_num(uint8_t* src, size_t len)
169 {
170 uint64_t num = 0;
171 while (len--)
172 {
173 num = (num << 8) | (*src);
174 src++;
175 }
176 return num;
177 }
178
179 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
180 while (len--) {
181 dest[len] = n & 1;
182 n >>= 1;
183 }
184 }
185
186 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
187 // to
188 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
189 // up to 64 bytes or 512 bits
190 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
191 static uint8_t buf[64];
192 memset(buf, 0x00, 64);
193 uint8_t *tmp = buf;
194 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
195 for (size_t i = 0; i < blockSize; i++){
196 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
197 }
198 }
199 return tmp;
200 }
201
202 //assumes little endian
203 char * printBits(size_t const size, void const * const ptr)
204 {
205 unsigned char *b = (unsigned char*) ptr;
206 unsigned char byte;
207 static char buf[1024];
208 char * tmp = buf;
209 int i, j;
210
211 for (i=size-1;i>=0;i--)
212 {
213 for (j=7;j>=0;j--)
214 {
215 byte = b[i] & (1<<j);
216 byte >>= j;
217 sprintf(tmp, "%u", byte);
218 tmp++;
219 }
220 }
221 return buf;
222 }
223
224 // -------------------------------------------------------------------------
225 // string parameters lib
226 // -------------------------------------------------------------------------
227
228 // -------------------------------------------------------------------------
229 // line - param line
230 // bg, en - symbol numbers in param line of beginning an ending parameter
231 // paramnum - param number (from 0)
232 // -------------------------------------------------------------------------
233 int param_getptr(const char *line, int *bg, int *en, int paramnum)
234 {
235 int i;
236 int len = strlen(line);
237
238 *bg = 0;
239 *en = 0;
240
241 // skip spaces
242 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
243 if (*bg >= len) {
244 return 1;
245 }
246
247 for (i = 0; i < paramnum; i++) {
248 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
249 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
250
251 if (line[*bg] == '\0') return 1;
252 }
253
254 *en = *bg;
255 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
256
257 (*en)--;
258
259 return 0;
260 }
261
262
263 char param_getchar(const char *line, int paramnum)
264 {
265 int bg, en;
266
267 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
268
269 return line[bg];
270 }
271
272 uint8_t param_get8(const char *line, int paramnum)
273 {
274 return param_get8ex(line, paramnum, 0, 10);
275 }
276
277 /**
278 * @brief Reads a decimal integer (actually, 0-254, not 255)
279 * @param line
280 * @param paramnum
281 * @return -1 if error
282 */
283 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
284 {
285 uint8_t val = param_get8ex(line, paramnum, 255, 10);
286 if( (int8_t) val == -1) return 1;
287 (*destination) = val;
288 return 0;
289 }
290 /**
291 * @brief Checks if param is decimal
292 * @param line
293 * @param paramnum
294 * @return
295 */
296 uint8_t param_isdec(const char *line, int paramnum)
297 {
298 int bg, en;
299 //TODO, check more thorougly
300 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
301 // return strtoul(&line[bg], NULL, 10) & 0xff;
302
303 return 0;
304 }
305
306 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
307 {
308 int bg, en;
309
310 if (!param_getptr(line, &bg, &en, paramnum))
311 return strtoul(&line[bg], NULL, base) & 0xff;
312 else
313 return deflt;
314 }
315
316 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
317 {
318 int bg, en;
319
320 if (!param_getptr(line, &bg, &en, paramnum))
321 return strtoul(&line[bg], NULL, base);
322 else
323 return deflt;
324 }
325
326 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
327 {
328 int bg, en;
329
330 if (!param_getptr(line, &bg, &en, paramnum))
331 return strtoull(&line[bg], NULL, base);
332 else
333 return deflt;
334
335 return 0;
336 }
337
338 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
339 {
340 int bg, en, temp, i;
341
342 if (hexcnt % 2)
343 return 1;
344
345 if (param_getptr(line, &bg, &en, paramnum)) return 1;
346
347 if (en - bg + 1 != hexcnt)
348 return 1;
349
350 for(i = 0; i < hexcnt; i += 2) {
351 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
352
353 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
354 data[i / 2] = temp & 0xff;
355 }
356
357 return 0;
358 }
359 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
360 {
361 int bg, en, temp, i;
362
363 //if (hexcnt % 2)
364 // return 1;
365
366 if (param_getptr(line, &bg, &en, paramnum)) return 1;
367
368 *hexcnt = en - bg + 1;
369 if (*hexcnt % 2) //error if not complete hex bytes
370 return 1;
371
372 for(i = 0; i < *hexcnt; i += 2) {
373 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
374
375 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
376 data[i / 2] = temp & 0xff;
377 }
378
379 return 0;
380 }
381 int param_getstr(const char *line, int paramnum, char * str)
382 {
383 int bg, en;
384
385 if (param_getptr(line, &bg, &en, paramnum)) return 0;
386
387 memcpy(str, line + bg, en - bg + 1);
388 str[en - bg + 1] = 0;
389
390 return en - bg + 1;
391 }
392
393 /*
394 The following methods comes from Rfidler sourcecode.
395 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
396 */
397
398 // convert hex to sequence of 0/1 bit values
399 // returns number of bits converted
400 int hextobinarray(char *target, char *source)
401 {
402 int length, i, count= 0;
403 char x;
404
405 length = strlen(source);
406 // process 4 bits (1 hex digit) at a time
407 while(length--)
408 {
409 x= *(source++);
410 // capitalize
411 if (x >= 'a' && x <= 'f')
412 x -= 32;
413 // convert to numeric value
414 if (x >= '0' && x <= '9')
415 x -= '0';
416 else if (x >= 'A' && x <= 'F')
417 x -= 'A' - 10;
418 else
419 return 0;
420 // output
421 for(i= 0 ; i < 4 ; ++i, ++count)
422 *(target++)= (x >> (3 - i)) & 1;
423 }
424
425 return count;
426 }
427
428 // convert hex to human readable binary string
429 int hextobinstring(char *target, char *source)
430 {
431 int length;
432
433 if(!(length= hextobinarray(target, source)))
434 return 0;
435 binarraytobinstring(target, target, length);
436 return length;
437 }
438
439 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
440 // return number of bits converted
441 int binarraytohex(char *target,char *source, int length)
442 {
443 unsigned char i, x;
444 int j = length;
445
446 if(j % 4)
447 return 0;
448
449 while(j)
450 {
451 for(i= x= 0 ; i < 4 ; ++i)
452 x += ( source[i] << (3 - i));
453 sprintf(target,"%X", x);
454 ++target;
455 source += 4;
456 j -= 4;
457 }
458 return length;
459 }
460
461 // convert binary array to human readable binary
462 void binarraytobinstring(char *target, char *source, int length)
463 {
464 int i;
465
466 for(i= 0 ; i < length ; ++i)
467 *(target++)= *(source++) + '0';
468 *target= '\0';
469 }
470
471 // return parity bit required to match type
472 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
473 {
474 int x;
475
476 for(x= 0 ; length > 0 ; --length)
477 x += bits[length - 1];
478 x %= 2;
479
480 return x ^ type;
481 }
482
483 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
484 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
485 {
486 *(target++)= GetParity(source, EVEN, length / 2);
487 memcpy(target, source, length);
488 target += length;
489 *(target)= GetParity(source + length / 2, ODD, length / 2);
490 }
491
492 void xor(unsigned char *dst, unsigned char *src, size_t len) {
493 for( ; len > 0; len--,dst++,src++)
494 *dst ^= *src;
495 }
496
497 int32_t le24toh (uint8_t data[3]) {
498 return (data[2] << 16) | (data[1] << 8) | data[0];
499 }
500
501 // RotateLeft - Ultralight, Desfire, works on byte level
502 // 00-01-02 >> 01-02-00
503 void rol(uint8_t *data, const size_t len){
504 uint8_t first = data[0];
505 for (size_t i = 0; i < len-1; i++) {
506 data[i] = data[i+1];
507 }
508 data[len-1] = first;
509 }
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