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[proxmark3-svn] / client / util.c
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
217 char param_getchar(const char *line, int paramnum)
218 {
219 int bg, en;
220
221 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
222
223 return line[bg];
224 }
225
226 uint8_t param_get8(const char *line, int paramnum)
227 {
228 return param_get8ex(line, paramnum, 10, 0);
229 }
230
231 /**
232 * @brief Reads a decimal integer (actually, 0-254, not 255)
233 * @param line
234 * @param paramnum
235 * @return -1 if error
236 */
237 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
238 {
239 uint8_t val = param_get8ex(line, paramnum, 255, 10);
240 printf("read %i", (int8_t ) val);
241 if( (int8_t) val == -1) return 1;
242 (*destination) = val;
243 return 0;
244 }
245 /**
246 * @brief Checks if param is decimal
247 * @param line
248 * @param paramnum
249 * @return
250 */
251 uint8_t param_isdec(const char *line, int paramnum)
252 {
253 int bg, en;
254 //TODO, check more thorougly
255 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
256 // return strtoul(&line[bg], NULL, 10) & 0xff;
257
258 return 0;
259 }
260
261 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
262 {
263 int bg, en;
264
265 if (!param_getptr(line, &bg, &en, paramnum))
266 return strtoul(&line[bg], NULL, base) & 0xff;
267 else
268 return deflt;
269 }
270
271 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
272 {
273 int bg, en;
274
275 if (!param_getptr(line, &bg, &en, paramnum))
276 return strtoul(&line[bg], NULL, base);
277 else
278 return deflt;
279 }
280
281 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
282 {
283 int bg, en;
284
285 if (!param_getptr(line, &bg, &en, paramnum))
286 return strtoull(&line[bg], NULL, base);
287 else
288 return deflt;
289
290 return 0;
291 }
292
293 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
294 {
295 int bg, en, temp, i;
296
297 if (hexcnt % 2)
298 return 1;
299
300 if (param_getptr(line, &bg, &en, paramnum)) return 1;
301
302 if (en - bg + 1 != hexcnt)
303 return 1;
304
305 for(i = 0; i < hexcnt; i += 2) {
306 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
307
308 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
309 data[i / 2] = temp & 0xff;
310 }
311
312 return 0;
313 }
314
315 int param_getstr(const char *line, int paramnum, char * str)
316 {
317 int bg, en;
318
319 if (param_getptr(line, &bg, &en, paramnum)) return 0;
320
321 memcpy(str, line + bg, en - bg + 1);
322 str[en - bg + 1] = 0;
323
324 return en - bg + 1;
325 }
326
327 /*
328 The following methods comes from Rfidler sourcecode.
329 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
330 */
331
332 // convert hex to sequence of 0/1 bit values
333 // returns number of bits converted
334 int hextobinarray(char *target, char *source)
335 {
336 int length, i, count= 0;
337 char x;
338
339 length = strlen(source);
340 // process 4 bits (1 hex digit) at a time
341 while(length--)
342 {
343 x= *(source++);
344 // capitalize
345 if (x >= 'a' && x <= 'f')
346 x -= 32;
347 // convert to numeric value
348 if (x >= '0' && x <= '9')
349 x -= '0';
350 else if (x >= 'A' && x <= 'F')
351 x -= 'A' - 10;
352 else
353 return 0;
354 // output
355 for(i= 0 ; i < 4 ; ++i, ++count)
356 *(target++)= (x >> (3 - i)) & 1;
357 }
358
359 return count;
360 }
361
362 // convert hex to human readable binary string
363 int hextobinstring(char *target, char *source)
364 {
365 int length;
366
367 if(!(length= hextobinarray(target, source)))
368 return 0;
369 binarraytobinstring(target, target, length);
370 return length;
371 }
372
373 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
374 // return number of bits converted
375 int binarraytohex(char *target, char *source, int length)
376 {
377 unsigned char i, x;
378 int j = length;
379
380 if(j % 4)
381 return 0;
382
383 while(j)
384 {
385 for(i= x= 0 ; i < 4 ; ++i)
386 x += ( source[i] << (3 - i));
387 sprintf(target,"%X", x);
388 ++target;
389 source += 4;
390 j -= 4;
391 }
392 return length;
393 }
394
395 // convert binary array to human readable binary
396 void binarraytobinstring(char *target, char *source, int length)
397 {
398 int i;
399
400 for(i= 0 ; i < length ; ++i)
401 *(target++)= *(source++) + '0';
402 *target= '\0';
403 }
404
405 // return parity bit required to match type
406 uint8_t GetParity( char *bits, uint8_t type, int length)
407 {
408 int x;
409
410 for(x= 0 ; length > 0 ; --length)
411 x += bits[length - 1];
412 x %= 2;
413
414 return x ^ type;
415 }
416
417 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
418 void wiegand_add_parity(char *target, char *source, char length)
419 {
420 *(target++)= GetParity(source, EVEN, length / 2);
421 memcpy(target, source, length);
422 target += length;
423 *(target)= GetParity(source + length / 2, ODD, length / 2);
424 }
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