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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 tcgetattr( 0, &Otty);
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
101 void print_hex(const uint8_t * data, const size_t len)
102 {
103 size_t i;
104
105 for (i=0; i < len; i++)
106 printf("%02x ", data[i]);
107
108 printf("\n");
109 }
110
111 char *sprint_hex(const uint8_t *data, const size_t len) {
112
113 int maxLen = ( len > 1024/3) ? 1024/3 : len;
114 static char buf[1024];
115 memset(buf, 0x00, 1024);
116 char * tmp = buf;
117 size_t i;
118
119 for (i=0; i < maxLen; ++i, tmp += 3)
120 sprintf(tmp, "%02X ", data[i]);
121
122 return buf;
123 }
124
125 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
126 // make sure we don't go beyond our char array memory
127 int max_len;
128 if (breaks==0)
129 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
130 else
131 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
132
133 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
134 //clear memory
135 memset(buf, 0x00, sizeof(buf));
136 char *tmp = buf;
137
138 size_t in_index = 0;
139 // loop through the out_index to make sure we don't go too far
140 for (size_t out_index=0; out_index < max_len; out_index++) {
141 // set character
142 sprintf(tmp++, "%u", data[in_index]);
143 // check if a line break is needed and we have room to print it in our array
144 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
145 // increment and print line break
146 out_index++;
147 sprintf(tmp++, "%s","\n");
148 }
149 in_index++;
150 }
151
152 return buf;
153 }
154
155 char *sprint_bin(const uint8_t *data, const size_t len) {
156 return sprint_bin_break(data, len, 0);
157 }
158
159 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
160 static char buf[1024];
161 memset(buf, 0x00, 1024);
162 char *tmp = buf;
163 sprintf(tmp, "%s| %s", sprint_hex(data, len) , data);
164 return buf;
165 }
166 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
167 {
168 while (len--) {
169 dest[len] = (uint8_t) n;
170 n >>= 8;
171 }
172 }
173
174 uint64_t bytes_to_num(uint8_t* src, size_t len)
175 {
176 uint64_t num = 0;
177 while (len--)
178 {
179 num = (num << 8) | (*src);
180 src++;
181 }
182 return num;
183 }
184
185 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
186 while (len--) {
187 dest[len] = n & 1;
188 n >>= 1;
189 }
190 }
191
192 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
193 // to
194 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
195 // up to 64 bytes or 512 bits
196 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
197 static uint8_t buf[64];
198 memset(buf, 0x00, 64);
199 uint8_t *tmp = buf;
200 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
201 for (size_t i = 0; i < blockSize; i++){
202 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
203 }
204 }
205 return tmp;
206 }
207
208 // -------------------------------------------------------------------------
209 // string parameters lib
210 // -------------------------------------------------------------------------
211
212 // -------------------------------------------------------------------------
213 // line - param line
214 // bg, en - symbol numbers in param line of beginning an ending parameter
215 // paramnum - param number (from 0)
216 // -------------------------------------------------------------------------
217 int param_getptr(const char *line, int *bg, int *en, int paramnum)
218 {
219 int i;
220 int len = strlen(line);
221
222 *bg = 0;
223 *en = 0;
224
225 // skip spaces
226 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
227 if (*bg >= len) {
228 return 1;
229 }
230
231 for (i = 0; i < paramnum; i++) {
232 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
233 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
234
235 if (line[*bg] == '\0') return 1;
236 }
237
238 *en = *bg;
239 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
240
241 (*en)--;
242
243 return 0;
244 }
245
246
247 char param_getchar(const char *line, int paramnum)
248 {
249 int bg, en;
250
251 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
252
253 return line[bg];
254 }
255
256 uint8_t param_get8(const char *line, int paramnum)
257 {
258 return param_get8ex(line, paramnum, 0, 10);
259 }
260
261 /**
262 * @brief Reads a decimal integer (actually, 0-254, not 255)
263 * @param line
264 * @param paramnum
265 * @return -1 if error
266 */
267 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
268 {
269 uint8_t val = param_get8ex(line, paramnum, 255, 10);
270 if( (int8_t) val == -1) return 1;
271 (*destination) = val;
272 return 0;
273 }
274 /**
275 * @brief Checks if param is decimal
276 * @param line
277 * @param paramnum
278 * @return
279 */
280 uint8_t param_isdec(const char *line, int paramnum)
281 {
282 int bg, en;
283 //TODO, check more thorougly
284 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
285 // return strtoul(&line[bg], NULL, 10) & 0xff;
286
287 return 0;
288 }
289
290 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
291 {
292 int bg, en;
293
294 if (!param_getptr(line, &bg, &en, paramnum))
295 return strtoul(&line[bg], NULL, base) & 0xff;
296 else
297 return deflt;
298 }
299
300 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
301 {
302 int bg, en;
303
304 if (!param_getptr(line, &bg, &en, paramnum))
305 return strtoul(&line[bg], NULL, base);
306 else
307 return deflt;
308 }
309
310 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
311 {
312 int bg, en;
313
314 if (!param_getptr(line, &bg, &en, paramnum))
315 return strtoull(&line[bg], NULL, base);
316 else
317 return deflt;
318
319 return 0;
320 }
321
322 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
323 {
324 int bg, en, temp, i;
325
326 if (hexcnt & 1) return 1;
327
328 if (param_getptr(line, &bg, &en, paramnum)) return 1;
329
330 if (en - bg + 1 != hexcnt) return 1;
331
332 for(i = 0; i < hexcnt; i += 2) {
333 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
334
335 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
336 data[i / 2] = temp & 0xff;
337 }
338
339 return 0;
340 }
341 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
342 {
343 int bg, en, temp, i;
344
345 //if (hexcnt % 2)
346 // return 1;
347
348 if (param_getptr(line, &bg, &en, paramnum)) return 1;
349
350 *hexcnt = en - bg + 1;
351 if (*hexcnt % 2) //error if not complete hex bytes
352 return 1;
353
354 for(i = 0; i < *hexcnt; i += 2) {
355 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
356
357 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
358 data[i / 2] = temp & 0xff;
359 }
360
361 return 0;
362 }
363 int param_getstr(const char *line, int paramnum, char * str)
364 {
365 int bg, en;
366
367 if (param_getptr(line, &bg, &en, paramnum)) return 0;
368
369 memcpy(str, line + bg, en - bg + 1);
370 str[en - bg + 1] = 0;
371
372 return en - bg + 1;
373 }
374
375 /*
376 The following methods comes from Rfidler sourcecode.
377 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
378 */
379
380 // convert hex to sequence of 0/1 bit values
381 // returns number of bits converted
382 int hextobinarray(char *target, char *source)
383 {
384 int length, i, count= 0;
385 char x;
386
387 length = strlen(source);
388 // process 4 bits (1 hex digit) at a time
389 while(length--)
390 {
391 x= *(source++);
392 // capitalize
393 if (x >= 'a' && x <= 'f')
394 x -= 32;
395 // convert to numeric value
396 if (x >= '0' && x <= '9')
397 x -= '0';
398 else if (x >= 'A' && x <= 'F')
399 x -= 'A' - 10;
400 else
401 return 0;
402 // output
403 for(i= 0 ; i < 4 ; ++i, ++count)
404 *(target++)= (x >> (3 - i)) & 1;
405 }
406
407 return count;
408 }
409
410 // convert hex to human readable binary string
411 int hextobinstring(char *target, char *source)
412 {
413 int length;
414
415 if(!(length= hextobinarray(target, source)))
416 return 0;
417 binarraytobinstring(target, target, length);
418 return length;
419 }
420
421 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
422 // return number of bits converted
423 int binarraytohex(char *target, char *source, int length)
424 {
425 unsigned char i, x;
426 int j = length;
427
428 if(j % 4)
429 return 0;
430
431 while(j)
432 {
433 for(i= x= 0 ; i < 4 ; ++i)
434 x += ( source[i] << (3 - i));
435 sprintf(target,"%X", x);
436 ++target;
437 source += 4;
438 j -= 4;
439 }
440 return length;
441 }
442
443 // convert binary array to human readable binary
444 void binarraytobinstring(char *target, char *source, int length)
445 {
446 int i;
447
448 for(i= 0 ; i < length ; ++i)
449 *(target++)= *(source++) + '0';
450 *target= '\0';
451 }
452
453 // return parity bit required to match type
454 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
455 {
456 int x;
457
458 for(x= 0 ; length > 0 ; --length)
459 x += bits[length - 1];
460 x %= 2;
461
462 return x ^ type;
463 }
464
465 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
466 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
467 {
468 *(target++)= GetParity(source, EVEN, length / 2);
469 memcpy(target, source, length);
470 target += length;
471 *(target)= GetParity(source + length / 2, ODD, length / 2);
472 }
473
474 void xor(unsigned char * dst, unsigned char * src, size_t len) {
475 for( ; len > 0; len--,dst++,src++)
476 *dst ^= *src;
477 }
478
479 int32_t le24toh (uint8_t data[3]) {
480 return (data[2] << 16) | (data[1] << 8) | data[0];
481 }
482
483 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
484
485 if (len > 32) return 0;
486
487 int i = start;
488 int j = len-1;
489 uint32_t tmp = 0;
490
491 for (; j >= 0; --j, ++i)
492 tmp |= bits[i] << j;
493
494 return tmp;
495 }
496
497 // RotateLeft - Ultralight, Desfire
498 void rol(uint8_t *data, const size_t len){
499 uint8_t first = data[0];
500 for (size_t i = 0; i < len-1; i++) {
501 data[i] = data[i+1];
502 }
503 data[len-1] = first;
504 }
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