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ADD: first try to implement crc-16 for Legic Advant *not working yet* Can't verify it.
[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 #define MAX_BIN_BREAK_LENGTH (3072+384+1)
13
14 #ifndef _WIN32
15 #include <termios.h>
16 #include <sys/ioctl.h>
17
18 int ukbhit(void)
19 {
20 int cnt = 0;
21 int error;
22 static struct termios Otty, Ntty;
23
24 if ( tcgetattr( 0, &Otty) == -1) return -1;
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 void print_hex(const uint8_t * data, const size_t len) {
101 size_t i;
102 for (i=0; i < len; ++i)
103 printf("%02x ", data[i]);
104 printf("\n");
105 }
106 void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
107 size_t i;
108 for ( i = 0; i < len; ++i) {
109
110 printf("%02X ", data[i]);
111
112 // check if a line break is needed
113 if ( (breaks > 0) && (i > 0) && !(i % breaks) )
114 printf("(%d %d)\n", i , breaks);
115 }
116 printf("\n");
117 }
118
119 char *sprint_hex(const uint8_t *data, const size_t len) {
120
121 int maxLen = ( len > 1024/3) ? 1024/3 : len;
122 static char buf[1024];
123 memset(buf, 0x00, 1024);
124 char * tmp = buf;
125 size_t i;
126
127 for (i=0; i < maxLen; ++i, tmp += 3)
128 sprintf(tmp, "%02X ", data[i]);
129
130 return buf;
131 }
132
133 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
134 // make sure we don't go beyond our char array memory
135 int max_len;
136 if (breaks==0)
137 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
138 else
139 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
140
141 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
142 //clear memory
143 memset(buf, 0x00, sizeof(buf));
144 char *tmp = buf;
145
146 size_t in_index = 0;
147 // loop through the out_index to make sure we don't go too far
148 for (size_t out_index=0; out_index < max_len-2; out_index++) {
149 // set character
150 sprintf(tmp++, "%u", data[in_index]);
151 // check if a line break is needed and we have room to print it in our array
152 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
153 // increment and print line break
154 out_index++;
155 sprintf(tmp++, "%s","\n");
156 }
157 in_index++;
158 }
159
160 return buf;
161 }
162
163 char *sprint_bin(const uint8_t *data, const size_t len) {
164 return sprint_bin_break(data, len, 0);
165 }
166
167 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
168 static char buf[1024];
169 char *tmp = buf;
170 memset(buf, 0x00, 1024);
171 size_t max_len = (len > 1010) ? 1010 : len;
172 sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);
173 return buf;
174 }
175 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
176 {
177 while (len--) {
178 dest[len] = (uint8_t) n;
179 n >>= 8;
180 }
181 }
182
183 uint64_t bytes_to_num(uint8_t* src, size_t len)
184 {
185 uint64_t num = 0;
186 while (len--)
187 {
188 num = (num << 8) | (*src);
189 src++;
190 }
191 return num;
192 }
193
194 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
195 while (len--) {
196 dest[len] = n & 1;
197 n >>= 1;
198 }
199 }
200
201 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
202 // to
203 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
204 // up to 64 bytes or 512 bits
205 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
206 uint8_t buf[64];
207 memset(buf, 0x00, 64);
208 uint8_t *tmp = buf;
209 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
210 for (size_t i = 0; i < blockSize; i++){
211 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
212 }
213 }
214 return tmp;
215 }
216
217 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
218 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
219 for (size_t i = 0; i < blockSize; i++){
220 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
221 }
222 }
223 }
224
225
226 // -------------------------------------------------------------------------
227 // string parameters lib
228 // -------------------------------------------------------------------------
229
230 // -------------------------------------------------------------------------
231 // line - param line
232 // bg, en - symbol numbers in param line of beginning an ending parameter
233 // paramnum - param number (from 0)
234 // -------------------------------------------------------------------------
235 int param_getptr(const char *line, int *bg, int *en, int paramnum)
236 {
237 int i;
238 int len = strlen(line);
239
240 *bg = 0;
241 *en = 0;
242
243 // skip spaces
244 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
245 if (*bg >= len) {
246 return 1;
247 }
248
249 for (i = 0; i < paramnum; i++) {
250 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
251 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
252
253 if (line[*bg] == '\0') return 1;
254 }
255
256 *en = *bg;
257 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
258
259 (*en)--;
260
261 return 0;
262 }
263
264
265 char param_getchar(const char *line, int paramnum)
266 {
267 int bg, en;
268
269 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
270
271 return line[bg];
272 }
273
274 uint8_t param_get8(const char *line, int paramnum)
275 {
276 return param_get8ex(line, paramnum, 0, 10);
277 }
278
279 /**
280 * @brief Reads a decimal integer (actually, 0-254, not 255)
281 * @param line
282 * @param paramnum
283 * @return -1 if error
284 */
285 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
286 {
287 uint8_t val = param_get8ex(line, paramnum, 255, 10);
288 if( (int8_t) val == -1) return 1;
289 (*destination) = val;
290 return 0;
291 }
292 /**
293 * @brief Checks if param is decimal
294 * @param line
295 * @param paramnum
296 * @return
297 */
298 uint8_t param_isdec(const char *line, int paramnum)
299 {
300 int bg, en;
301 //TODO, check more thorougly
302 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
303 // return strtoul(&line[bg], NULL, 10) & 0xff;
304
305 return 0;
306 }
307
308 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
309 {
310 int bg, en;
311
312 if (!param_getptr(line, &bg, &en, paramnum))
313 return strtoul(&line[bg], NULL, base) & 0xff;
314 else
315 return deflt;
316 }
317
318 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
319 {
320 int bg, en;
321
322 if (!param_getptr(line, &bg, &en, paramnum))
323 return strtoul(&line[bg], NULL, base);
324 else
325 return deflt;
326 }
327
328 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
329 {
330 int bg, en;
331
332 if (!param_getptr(line, &bg, &en, paramnum))
333 return strtoull(&line[bg], NULL, base);
334 else
335 return deflt;
336
337 return 0;
338 }
339
340 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
341 {
342 int bg, en, temp, i;
343
344 if (hexcnt & 1) return 1;
345
346 if (param_getptr(line, &bg, &en, paramnum)) return 1;
347
348 if (en - bg + 1 != hexcnt) return 1;
349
350 for(i = 0; i < hexcnt; i += 2) {
351 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
352
353 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
354 data[i / 2] = temp & 0xff;
355 }
356
357 return 0;
358 }
359 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
360 {
361 int bg, en, temp, i;
362
363 //if (hexcnt % 2)
364 // return 1;
365
366 if (param_getptr(line, &bg, &en, paramnum)) return 1;
367
368 *hexcnt = en - bg + 1;
369 if (*hexcnt % 2) //error if not complete hex bytes
370 return 1;
371
372 for(i = 0; i < *hexcnt; i += 2) {
373 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
374
375 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
376 data[i / 2] = temp & 0xff;
377 }
378
379 return 0;
380 }
381 int param_getstr(const char *line, int paramnum, char * str)
382 {
383 int bg, en;
384
385 if (param_getptr(line, &bg, &en, paramnum)) return 0;
386
387 memcpy(str, line + bg, en - bg + 1);
388 str[en - bg + 1] = 0;
389
390 return en - bg + 1;
391 }
392
393 /*
394 The following methods comes from Rfidler sourcecode.
395 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
396 */
397
398 // convert hex to sequence of 0/1 bit values
399 // returns number of bits converted
400 int hextobinarray(char *target, char *source)
401 {
402 int length, i, count= 0;
403 char x;
404
405 length = strlen(source);
406 // process 4 bits (1 hex digit) at a time
407 while(length--)
408 {
409 x= *(source++);
410 // capitalize
411 if (x >= 'a' && x <= 'f')
412 x -= 32;
413 // convert to numeric value
414 if (x >= '0' && x <= '9')
415 x -= '0';
416 else if (x >= 'A' && x <= 'F')
417 x -= 'A' - 10;
418 else
419 return 0;
420 // output
421 for(i= 0 ; i < 4 ; ++i, ++count)
422 *(target++)= (x >> (3 - i)) & 1;
423 }
424
425 return count;
426 }
427
428 // convert hex to human readable binary string
429 int hextobinstring(char *target, char *source)
430 {
431 int length;
432
433 if(!(length= hextobinarray(target, source)))
434 return 0;
435 binarraytobinstring(target, target, length);
436 return length;
437 }
438
439 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
440 // return number of bits converted
441 int binarraytohex(char *target, char *source, int length)
442 {
443 unsigned char i, x;
444 int j = length;
445
446 if(j % 4)
447 return 0;
448
449 while(j)
450 {
451 for(i= x= 0 ; i < 4 ; ++i)
452 x += ( source[i] << (3 - i));
453 sprintf(target,"%X", x);
454 ++target;
455 source += 4;
456 j -= 4;
457 }
458 return length;
459 }
460
461 // convert binary array to human readable binary
462 void binarraytobinstring(char *target, char *source, int length)
463 {
464 int i;
465
466 for(i= 0 ; i < length ; ++i)
467 *(target++)= *(source++) + '0';
468 *target= '\0';
469 }
470
471 // return parity bit required to match type
472 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
473 {
474 int x;
475 for( x = 0 ; length > 0 ; --length)
476 x += bits[length - 1];
477 x %= 2;
478 return x ^ type;
479 }
480
481 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
482 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
483 {
484 *(target++)= GetParity(source, EVEN, length / 2);
485 memcpy(target, source, length);
486 target += length;
487 *(target)= GetParity(source + length / 2, ODD, length / 2);
488 }
489
490 void xor(unsigned char * dst, unsigned char * src, size_t len) {
491 for( ; len > 0; len--,dst++,src++)
492 *dst ^= *src;
493 }
494
495 int32_t le24toh (uint8_t data[3]) {
496 return (data[2] << 16) | (data[1] << 8) | data[0];
497 }
498
499 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
500
501 if (len > 32) return 0;
502
503 int i = start;
504 int j = len-1;
505 uint32_t tmp = 0;
506
507 for (; j >= 0; --j, ++i)
508 tmp |= bits[i] << j;
509
510 return tmp;
511 }
512
513 // RotateLeft - Ultralight, Desfire, works on byte level
514 // 00-01-02 >> 01-02-00
515 void rol(uint8_t *data, const size_t len){
516 uint8_t first = data[0];
517 for (size_t i = 0; i < len-1; i++) {
518 data[i] = data[i+1];
519 }
520 data[len-1] = first;
521 }
522
523 uint32_t SwapBits(uint32_t value, int nrbits) {
524 uint32_t newvalue = 0;
525 for(int i = 0; i < nrbits; i++) {
526 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
527 }
528 return newvalue;
529 }
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