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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 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
231 {
232 int bg, en;
233
234 if (!param_getptr(line, &bg, &en, paramnum))
235 return strtoul(&line[bg], NULL, base) & 0xff;
236 else
237 return deflt;
238 }
239
240 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
241 {
242 int bg, en;
243
244 if (!param_getptr(line, &bg, &en, paramnum))
245 return strtoul(&line[bg], NULL, base);
246 else
247 return deflt;
248 }
249
250 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
251 {
252 int bg, en;
253
254 if (!param_getptr(line, &bg, &en, paramnum))
255 return strtoull(&line[bg], NULL, base);
256 else
257 return deflt;
258
259 return 0;
260 }
261
262 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
263 {
264 int bg, en, temp, i;
265
266 if (hexcnt % 2)
267 return 1;
268
269 if (param_getptr(line, &bg, &en, paramnum)) return 1;
270
271 if (en - bg + 1 != hexcnt)
272 return 1;
273
274 for(i = 0; i < hexcnt; i += 2) {
275 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
276
277 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
278 data[i / 2] = temp & 0xff;
279 }
280
281 return 0;
282 }
283
284 int param_getstr(const char *line, int paramnum, char * str)
285 {
286 int bg, en;
287
288 if (param_getptr(line, &bg, &en, paramnum)) return 0;
289
290 memcpy(str, line + bg, en - bg + 1);
291 str[en - bg + 1] = 0;
292
293 return en - bg + 1;
294 }
295
296 /*
297 The following methods comes from Rfidler sourcecode.
298 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
299 */
300
301 // convert hex to sequence of 0/1 bit values
302 // returns number of bits converted
303 int hextobinarray(char *target, char *source)
304 {
305 int length, i, count= 0;
306 char x;
307
308 length = strlen(source);
309 // process 4 bits (1 hex digit) at a time
310 while(length--)
311 {
312 x= *(source++);
313 // capitalize
314 if (x >= 'a' && x <= 'f')
315 x -= 32;
316 // convert to numeric value
317 if (x >= '0' && x <= '9')
318 x -= '0';
319 else if (x >= 'A' && x <= 'F')
320 x -= 'A' - 10;
321 else
322 return 0;
323 // output
324 for(i= 0 ; i < 4 ; ++i, ++count)
325 *(target++)= (x >> (3 - i)) & 1;
326 }
327
328 return count;
329 }
330
331 // convert hex to human readable binary string
332 int hextobinstring(char *target, char *source)
333 {
334 int length;
335
336 if(!(length= hextobinarray(target, source)))
337 return 0;
338 binarraytobinstring(target, target, length);
339 return length;
340 }
341
342 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
343 // return number of bits converted
344 int binarraytohex(char *target, char *source, int length)
345 {
346 unsigned char i, x;
347 int j = length;
348
349 if(j % 4)
350 return 0;
351
352 while(j)
353 {
354 for(i= x= 0 ; i < 4 ; ++i)
355 x += ( source[i] << (3 - i));
356 sprintf(target,"%X", x);
357 ++target;
358 source += 4;
359 j -= 4;
360 }
361 return length;
362 }
363
364 // convert binary array to human readable binary
365 void binarraytobinstring(char *target, char *source, int length)
366 {
367 int i;
368
369 for(i= 0 ; i < length ; ++i)
370 *(target++)= *(source++) + '0';
371 *target= '\0';
372 }
373
374 // return parity bit required to match type
375 uint8_t GetParity( char *bits, uint8_t type, int length)
376 {
377 int x;
378
379 for(x= 0 ; length > 0 ; --length)
380 x += bits[length - 1];
381 x %= 2;
382
383 return x ^ type;
384 }
385
386 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
387 void wiegand_add_parity(char *target, char *source, char length)
388 {
389 *(target++)= GetParity(source, EVEN, length / 2);
390 memcpy(target, source, length);
391 target += length;
392 *(target)= GetParity(source + length / 2, ODD, length / 2);
393 }
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