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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 = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
130 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
131 //clear memory
132 memset(buf, 0x00, sizeof(buf));
133 char *tmp = buf;
134
135 size_t in_index = 0;
136 // loop through the out_index to make sure we don't go too far
137 for (size_t out_index=0; out_index < max_len; out_index++) {
138 // set character
139 sprintf(tmp++, "%u", data[in_index]);
140 // check if a line break is needed
141 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
142 // increment and print line break
143 out_index++;
144 sprintf(tmp++, "%s","\n");
145 }
146 in_index++;
147 }
148
149 return buf;
150 }
151
152 char *sprint_bin(const uint8_t *data, const size_t len) {
153 return sprint_bin_break(data, len, 0);
154 }
155 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
156 {
157 while (len--) {
158 dest[len] = (uint8_t) n;
159 n >>= 8;
160 }
161 }
162
163 uint64_t bytes_to_num(uint8_t* src, size_t len)
164 {
165 uint64_t num = 0;
166 while (len--)
167 {
168 num = (num << 8) | (*src);
169 src++;
170 }
171 return num;
172 }
173
174 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
175 while (len--) {
176 dest[len] = n & 1;
177 n >>= 1;
178 }
179 }
180
181 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
182 // to
183 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
184 // up to 64 bytes or 512 bits
185 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
186 static uint8_t buf[64];
187 memset(buf, 0x00, 64);
188 uint8_t *tmp = buf;
189 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
190 for (size_t i = 0; i < blockSize; i++){
191 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
192 }
193 }
194 return tmp;
195 }
196
197 //assumes little endian
198 char * printBits(size_t const size, void const * const ptr)
199 {
200 unsigned char *b = (unsigned char*) ptr;
201 unsigned char byte;
202 static char buf[1024];
203 char * tmp = buf;
204 int i, j;
205
206 for (i=size-1;i>=0;i--)
207 {
208 for (j=7;j>=0;j--)
209 {
210 byte = b[i] & (1<<j);
211 byte >>= j;
212 sprintf(tmp, "%u", byte);
213 tmp++;
214 }
215 }
216 return buf;
217 }
218
219 // -------------------------------------------------------------------------
220 // string parameters lib
221 // -------------------------------------------------------------------------
222
223 // -------------------------------------------------------------------------
224 // line - param line
225 // bg, en - symbol numbers in param line of beginning an ending parameter
226 // paramnum - param number (from 0)
227 // -------------------------------------------------------------------------
228 int param_getptr(const char *line, int *bg, int *en, int paramnum)
229 {
230 int i;
231 int len = strlen(line);
232
233 *bg = 0;
234 *en = 0;
235
236 // skip spaces
237 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
238 if (*bg >= len) {
239 return 1;
240 }
241
242 for (i = 0; i < paramnum; i++) {
243 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
244 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
245
246 if (line[*bg] == '\0') return 1;
247 }
248
249 *en = *bg;
250 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
251
252 (*en)--;
253
254 return 0;
255 }
256
257
258 char param_getchar(const char *line, int paramnum)
259 {
260 int bg, en;
261
262 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
263
264 return line[bg];
265 }
266
267 uint8_t param_get8(const char *line, int paramnum)
268 {
269 return param_get8ex(line, paramnum, 10, 0);
270 }
271
272 /**
273 * @brief Reads a decimal integer (actually, 0-254, not 255)
274 * @param line
275 * @param paramnum
276 * @return -1 if error
277 */
278 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
279 {
280 uint8_t val = param_get8ex(line, paramnum, 255, 10);
281 if( (int8_t) val == -1) return 1;
282 (*destination) = val;
283 return 0;
284 }
285 /**
286 * @brief Checks if param is decimal
287 * @param line
288 * @param paramnum
289 * @return
290 */
291 uint8_t param_isdec(const char *line, int paramnum)
292 {
293 int bg, en;
294 //TODO, check more thorougly
295 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
296 // return strtoul(&line[bg], NULL, 10) & 0xff;
297
298 return 0;
299 }
300
301 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
302 {
303 int bg, en;
304
305 if (!param_getptr(line, &bg, &en, paramnum))
306 return strtoul(&line[bg], NULL, base) & 0xff;
307 else
308 return deflt;
309 }
310
311 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
312 {
313 int bg, en;
314
315 if (!param_getptr(line, &bg, &en, paramnum))
316 return strtoul(&line[bg], NULL, base);
317 else
318 return deflt;
319 }
320
321 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
322 {
323 int bg, en;
324
325 if (!param_getptr(line, &bg, &en, paramnum))
326 return strtoull(&line[bg], NULL, base);
327 else
328 return deflt;
329
330 return 0;
331 }
332
333 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
334 {
335 int bg, en, temp, i;
336
337 if (hexcnt % 2)
338 return 1;
339
340 if (param_getptr(line, &bg, &en, paramnum)) return 1;
341
342 if (en - bg + 1 != hexcnt)
343 return 1;
344
345 for(i = 0; i < hexcnt; i += 2) {
346 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
347
348 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
349 data[i / 2] = temp & 0xff;
350 }
351
352 return 0;
353 }
354 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
355 {
356 int bg, en, temp, i;
357
358 //if (hexcnt % 2)
359 // return 1;
360
361 if (param_getptr(line, &bg, &en, paramnum)) return 1;
362
363 *hexcnt = en - bg + 1;
364 if (*hexcnt % 2) //error if not complete hex bytes
365 return 1;
366
367 for(i = 0; i < *hexcnt; i += 2) {
368 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
369
370 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
371 data[i / 2] = temp & 0xff;
372 }
373
374 return 0;
375 }
376 int param_getstr(const char *line, int paramnum, char * str)
377 {
378 int bg, en;
379
380 if (param_getptr(line, &bg, &en, paramnum)) return 0;
381
382 memcpy(str, line + bg, en - bg + 1);
383 str[en - bg + 1] = 0;
384
385 return en - bg + 1;
386 }
387
388 /*
389 The following methods comes from Rfidler sourcecode.
390 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
391 */
392
393 // convert hex to sequence of 0/1 bit values
394 // returns number of bits converted
395 int hextobinarray(char *target, char *source)
396 {
397 int length, i, count= 0;
398 char x;
399
400 length = strlen(source);
401 // process 4 bits (1 hex digit) at a time
402 while(length--)
403 {
404 x= *(source++);
405 // capitalize
406 if (x >= 'a' && x <= 'f')
407 x -= 32;
408 // convert to numeric value
409 if (x >= '0' && x <= '9')
410 x -= '0';
411 else if (x >= 'A' && x <= 'F')
412 x -= 'A' - 10;
413 else
414 return 0;
415 // output
416 for(i= 0 ; i < 4 ; ++i, ++count)
417 *(target++)= (x >> (3 - i)) & 1;
418 }
419
420 return count;
421 }
422
423 // convert hex to human readable binary string
424 int hextobinstring(char *target, char *source)
425 {
426 int length;
427
428 if(!(length= hextobinarray(target, source)))
429 return 0;
430 binarraytobinstring(target, target, length);
431 return length;
432 }
433
434 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
435 // return number of bits converted
436 int binarraytohex(char *target,char *source, int length)
437 {
438 unsigned char i, x;
439 int j = length;
440
441 if(j % 4)
442 return 0;
443
444 while(j)
445 {
446 for(i= x= 0 ; i < 4 ; ++i)
447 x += ( source[i] << (3 - i));
448 sprintf(target,"%X", x);
449 ++target;
450 source += 4;
451 j -= 4;
452 }
453 return length;
454 }
455
456 // convert binary array to human readable binary
457 void binarraytobinstring(char *target, char *source, int length)
458 {
459 int i;
460
461 for(i= 0 ; i < length ; ++i)
462 *(target++)= *(source++) + '0';
463 *target= '\0';
464 }
465
466 // return parity bit required to match type
467 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
468 {
469 int x;
470
471 for(x= 0 ; length > 0 ; --length)
472 x += bits[length - 1];
473 x %= 2;
474
475 return x ^ type;
476 }
477
478 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
479 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
480 {
481 *(target++)= GetParity(source, EVEN, length / 2);
482 memcpy(target, source, length);
483 target += length;
484 *(target)= GetParity(source + length / 2, ODD, length / 2);
485 }
486
487 void xor(unsigned char *dst, unsigned char *src, size_t len) {
488 for( ; len > 0; len--,dst++,src++)
489 *dst ^= *src;
490 }
491
492 int32_t le24toh (uint8_t data[3]) {
493 return (data[2] << 16) | (data[1] << 8) | data[0];
494 }
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