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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
13 #ifndef _WIN32
14 #include <termios.h>
15 #include <sys/ioctl.h>
16
17 int ukbhit(void)
18 {
19 int cnt = 0;
20 int error;
21 static struct termios Otty, Ntty;
22
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 char * tmp = buf;
116 size_t i;
117
118 for (i=0; i < maxLen; ++i, tmp += 3)
119 sprintf(tmp, "%02x ", data[i]);
120
121 return buf;
122 }
123
124 char * sprint_bin(const uint8_t * data, const size_t len) {
125
126 int maxLen = ( len > 1024) ? 1024 : len;
127 static char buf[1024];
128 char * tmp = buf;
129 size_t i;
130
131 for (i=0; i < maxLen; ++i, ++tmp)
132 sprintf(tmp, "%u", data[i]);
133
134 return buf;
135 }
136
137 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
138 {
139 while (len--) {
140 dest[len] = (uint8_t) n;
141 n >>= 8;
142 }
143 }
144
145 uint64_t bytes_to_num(uint8_t* src, size_t len)
146 {
147 uint64_t num = 0;
148 while (len--)
149 {
150 num = (num << 8) | (*src);
151 src++;
152 }
153 return num;
154 }
155
156 //assumes little endian
157 char * printBits(size_t const size, void const * const ptr)
158 {
159 unsigned char *b = (unsigned char*) ptr;
160 unsigned char byte;
161 static char buf[1024];
162 char * tmp = buf;
163 int i, j;
164
165 for (i=size-1;i>=0;i--)
166 {
167 for (j=7;j>=0;j--)
168 {
169 byte = b[i] & (1<<j);
170 byte >>= j;
171 sprintf(tmp, "%u", byte);
172 tmp++;
173 }
174 }
175 return buf;
176 }
177
178 // -------------------------------------------------------------------------
179 // string parameters lib
180 // -------------------------------------------------------------------------
181
182 // -------------------------------------------------------------------------
183 // line - param line
184 // bg, en - symbol numbers in param line of beginning an ending parameter
185 // paramnum - param number (from 0)
186 // -------------------------------------------------------------------------
187 int param_getptr(const char *line, int *bg, int *en, int paramnum)
188 {
189 int i;
190 int len = strlen(line);
191
192 *bg = 0;
193 *en = 0;
194
195 // skip spaces
196 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
197 if (*bg >= len) {
198 return 1;
199 }
200
201 for (i = 0; i < paramnum; i++) {
202 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
203 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
204
205 if (line[*bg] == '\0') return 1;
206 }
207
208 *en = *bg;
209 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
210
211 (*en)--;
212
213 return 0;
214 }
215
216 char param_getchar(const char *line, int paramnum)
217 {
218 int bg, en;
219
220 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
221
222 return line[bg];
223 }
224
225 uint8_t param_get8(const char *line, int paramnum)
226 {
227 return param_get8ex(line, paramnum, 10, 0);
228 }
229
230 /**
231 * @brief Reads a decimal integer
232 * @param line
233 * @param paramnum
234 * @return
235 */
236 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
237 {
238 uint8_t val = param_get8ex(line, paramnum, 10, 10);
239 (*destination) = val;
240 return 0;
241 }
242 /**
243 * @brief Checks if param is decimal
244 * @param line
245 * @param paramnum
246 * @return
247 */
248 uint8_t param_isdec(const char *line, int paramnum)
249 {
250 int bg, en;
251 //TODO, check more thorougly
252 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
253 // return strtoul(&line[bg], NULL, 10) & 0xff;
254
255 return 0;
256 }
257
258 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
259 {
260 int bg, en;
261
262 if (!param_getptr(line, &bg, &en, paramnum))
263 return strtoul(&line[bg], NULL, base) & 0xff;
264 else
265 return deflt;
266 }
267
268 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
269 {
270 int bg, en;
271
272 if (!param_getptr(line, &bg, &en, paramnum))
273 return strtoul(&line[bg], NULL, base);
274 else
275 return deflt;
276 }
277
278 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
279 {
280 int bg, en;
281
282 if (!param_getptr(line, &bg, &en, paramnum))
283 return strtoull(&line[bg], NULL, base);
284 else
285 return deflt;
286
287 return 0;
288 }
289
290 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
291 {
292 int bg, en, temp, i;
293
294 if (hexcnt % 2)
295 return 1;
296
297 if (param_getptr(line, &bg, &en, paramnum)) return 1;
298
299 if (en - bg + 1 != hexcnt)
300 return 1;
301
302 for(i = 0; i < hexcnt; i += 2) {
303 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
304
305 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
306 data[i / 2] = temp & 0xff;
307 }
308
309 return 0;
310 }
311
312 int param_getstr(const char *line, int paramnum, char * str)
313 {
314 int bg, en;
315
316 if (param_getptr(line, &bg, &en, paramnum)) return 0;
317
318 memcpy(str, line + bg, en - bg + 1);
319 str[en - bg + 1] = 0;
320
321 return en - bg + 1;
322 }
323
324 /*
325 The following methods comes from Rfidler sourcecode.
326 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
327 */
328
329 // convert hex to sequence of 0/1 bit values
330 // returns number of bits converted
331 int hextobinarray(char *target, char *source)
332 {
333 int length, i, count= 0;
334 char x;
335
336 length = strlen(source);
337 // process 4 bits (1 hex digit) at a time
338 while(length--)
339 {
340 x= *(source++);
341 // capitalize
342 if (x >= 'a' && x <= 'f')
343 x -= 32;
344 // convert to numeric value
345 if (x >= '0' && x <= '9')
346 x -= '0';
347 else if (x >= 'A' && x <= 'F')
348 x -= 'A' - 10;
349 else
350 return 0;
351 // output
352 for(i= 0 ; i < 4 ; ++i, ++count)
353 *(target++)= (x >> (3 - i)) & 1;
354 }
355
356 return count;
357 }
358
359 // convert hex to human readable binary string
360 int hextobinstring(char *target, char *source)
361 {
362 int length;
363
364 if(!(length= hextobinarray(target, source)))
365 return 0;
366 binarraytobinstring(target, target, length);
367 return length;
368 }
369
370 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
371 // return number of bits converted
372 int binarraytohex(char *target, char *source, int length)
373 {
374 unsigned char i, x;
375 int j = length;
376
377 if(j % 4)
378 return 0;
379
380 while(j)
381 {
382 for(i= x= 0 ; i < 4 ; ++i)
383 x += ( source[i] << (3 - i));
384 sprintf(target,"%X", x);
385 ++target;
386 source += 4;
387 j -= 4;
388 }
389 return length;
390 }
391
392 // convert binary array to human readable binary
393 void binarraytobinstring(char *target, char *source, int length)
394 {
395 int i;
396
397 for(i= 0 ; i < length ; ++i)
398 *(target++)= *(source++) + '0';
399 *target= '\0';
400 }
401
402 // return parity bit required to match type
403 uint8_t GetParity( char *bits, uint8_t type, int length)
404 {
405 int x;
406
407 for(x= 0 ; length > 0 ; --length)
408 x += bits[length - 1];
409 x %= 2;
410
411 return x ^ type;
412 }
413
414 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
415 void wiegand_add_parity(char *target, char *source, char length)
416 {
417 *(target++)= GetParity(source, EVEN, length / 2);
418 memcpy(target, source, length);
419 target += length;
420 *(target)= GetParity(source + length / 2, ODD, length / 2);
421 }
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