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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
17int 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>
43int ukbhit(void) {
44 return kbhit();
45}
46#endif
47
48// log files functions
49void 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
69void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
70 AddLogLine(fileName, extData, sprint_hex(data, len));
71}
72
73void 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
79void 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
90void 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
101void 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
111char * 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
124char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
125
126 int maxLen = ( len > 1024) ? 1024 : len;
127 static char buf[1024];
128 char *tmp = buf;
129
130 for (size_t i=0; i < maxLen; ++i){
131 sprintf(tmp++, "%u", data[i]);
132 if (breaks > 0 && !((i+1) % breaks))
133 sprintf(tmp++, "%s","\n");
134 }
135
136 return buf;
137}
138
139char *sprint_bin(const uint8_t *data, const size_t len) {
140 return sprint_bin_break(data, len, 0);
141}
142void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
143{
144 while (len--) {
145 dest[len] = (uint8_t) n;
146 n >>= 8;
147 }
148}
149
150uint64_t bytes_to_num(uint8_t* src, size_t len)
151{
152 uint64_t num = 0;
153 while (len--)
154 {
155 num = (num << 8) | (*src);
156 src++;
157 }
158 return num;
159}
160
161//assumes little endian
162char * printBits(size_t const size, void const * const ptr)
163{
164 unsigned char *b = (unsigned char*) ptr;
165 unsigned char byte;
166 static char buf[1024];
167 char * tmp = buf;
168 int i, j;
169
170 for (i=size-1;i>=0;i--)
171 {
172 for (j=7;j>=0;j--)
173 {
174 byte = b[i] & (1<<j);
175 byte >>= j;
176 sprintf(tmp, "%u", byte);
177 tmp++;
178 }
179 }
180 return buf;
181}
182
183// -------------------------------------------------------------------------
184// string parameters lib
185// -------------------------------------------------------------------------
186
187// -------------------------------------------------------------------------
188// line - param line
189// bg, en - symbol numbers in param line of beginning an ending parameter
190// paramnum - param number (from 0)
191// -------------------------------------------------------------------------
192int param_getptr(const char *line, int *bg, int *en, int paramnum)
193{
194 int i;
195 int len = strlen(line);
196
197 *bg = 0;
198 *en = 0;
199
200 // skip spaces
201 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
202 if (*bg >= len) {
203 return 1;
204 }
205
206 for (i = 0; i < paramnum; i++) {
207 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
208 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
209
210 if (line[*bg] == '\0') return 1;
211 }
212
213 *en = *bg;
214 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
215
216 (*en)--;
217
218 return 0;
219}
220
221
222char param_getchar(const char *line, int paramnum)
223{
224 int bg, en;
225
226 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
227
228 return line[bg];
229}
230
231uint8_t param_get8(const char *line, int paramnum)
232{
233 return param_get8ex(line, paramnum, 10, 0);
234}
235
236/**
237 * @brief Reads a decimal integer (actually, 0-254, not 255)
238 * @param line
239 * @param paramnum
240 * @return -1 if error
241 */
242uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
243{
244 uint8_t val = param_get8ex(line, paramnum, 255, 10);
245 if( (int8_t) val == -1) return 1;
246 (*destination) = val;
247 return 0;
248}
249/**
250 * @brief Checks if param is decimal
251 * @param line
252 * @param paramnum
253 * @return
254 */
255uint8_t param_isdec(const char *line, int paramnum)
256{
257 int bg, en;
258 //TODO, check more thorougly
259 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
260 // return strtoul(&line[bg], NULL, 10) & 0xff;
261
262 return 0;
263}
264
265uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
266{
267 int bg, en;
268
269 if (!param_getptr(line, &bg, &en, paramnum))
270 return strtoul(&line[bg], NULL, base) & 0xff;
271 else
272 return deflt;
273}
274
275uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
276{
277 int bg, en;
278
279 if (!param_getptr(line, &bg, &en, paramnum))
280 return strtoul(&line[bg], NULL, base);
281 else
282 return deflt;
283}
284
285uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
286{
287 int bg, en;
288
289 if (!param_getptr(line, &bg, &en, paramnum))
290 return strtoull(&line[bg], NULL, base);
291 else
292 return deflt;
293
294 return 0;
295}
296
297int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
298{
299 int bg, en, temp, i;
300
301 if (hexcnt % 2)
302 return 1;
303
304 if (param_getptr(line, &bg, &en, paramnum)) return 1;
305
306 if (en - bg + 1 != hexcnt)
307 return 1;
308
309 for(i = 0; i < hexcnt; i += 2) {
310 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
311
312 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
313 data[i / 2] = temp & 0xff;
314 }
315
316 return 0;
317}
318
319int param_getstr(const char *line, int paramnum, char * str)
320{
321 int bg, en;
322
323 if (param_getptr(line, &bg, &en, paramnum)) return 0;
324
325 memcpy(str, line + bg, en - bg + 1);
326 str[en - bg + 1] = 0;
327
328 return en - bg + 1;
329}
330
331/*
332The following methods comes from Rfidler sourcecode.
333https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
334*/
335
336// convert hex to sequence of 0/1 bit values
337// returns number of bits converted
338int hextobinarray(char *target, char *source)
339{
340 int length, i, count= 0;
341 char x;
342
343 length = strlen(source);
344 // process 4 bits (1 hex digit) at a time
345 while(length--)
346 {
347 x= *(source++);
348 // capitalize
349 if (x >= 'a' && x <= 'f')
350 x -= 32;
351 // convert to numeric value
352 if (x >= '0' && x <= '9')
353 x -= '0';
354 else if (x >= 'A' && x <= 'F')
355 x -= 'A' - 10;
356 else
357 return 0;
358 // output
359 for(i= 0 ; i < 4 ; ++i, ++count)
360 *(target++)= (x >> (3 - i)) & 1;
361 }
362
363 return count;
364}
365
366// convert hex to human readable binary string
367int hextobinstring(char *target, char *source)
368{
369 int length;
370
371 if(!(length= hextobinarray(target, source)))
372 return 0;
373 binarraytobinstring(target, target, length);
374 return length;
375}
376
377// convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
378// return number of bits converted
379int binarraytohex(char *target, char *source, int length)
380{
381 unsigned char i, x;
382 int j = length;
383
384 if(j % 4)
385 return 0;
386
387 while(j)
388 {
389 for(i= x= 0 ; i < 4 ; ++i)
390 x += ( source[i] << (3 - i));
391 sprintf(target,"%X", x);
392 ++target;
393 source += 4;
394 j -= 4;
395 }
396 return length;
397}
398
399// convert binary array to human readable binary
400void binarraytobinstring(char *target, char *source, int length)
401{
402 int i;
403
404 for(i= 0 ; i < length ; ++i)
405 *(target++)= *(source++) + '0';
406 *target= '\0';
407}
408
409// return parity bit required to match type
410uint8_t GetParity( char *bits, uint8_t type, int length)
411{
412 int x;
413
414 for(x= 0 ; length > 0 ; --length)
415 x += bits[length - 1];
416 x %= 2;
417
418 return x ^ type;
419}
420
421// add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
422void wiegand_add_parity(char *target, char *source, char length)
423{
424 *(target++)= GetParity(source, EVEN, length / 2);
425 memcpy(target, source, length);
426 target += length;
427 *(target)= GetParity(source + length / 2, ODD, length / 2);
428}
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