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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 #include "proxmark3.h"
13 #define MAX_BIN_BREAK_LENGTH (3072+384+1)
14
15 #ifndef _WIN32
16 #include <termios.h>
17 #include <sys/ioctl.h>
18
19 int ukbhit(void)
20 {
21 int cnt = 0;
22 int error;
23 static struct termios Otty, Ntty;
24
25 if ( tcgetattr( 0, &Otty) == -1) return -1;
26 Ntty = Otty;
27
28 Ntty.c_iflag = 0; /* input mode */
29 Ntty.c_oflag = 0; /* output mode */
30 Ntty.c_lflag &= ~ICANON; /* raw mode */
31 Ntty.c_cc[VMIN] = CMIN; /* minimum time to wait */
32 Ntty.c_cc[VTIME] = CTIME; /* minimum characters to wait for */
33
34 if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
35 error += ioctl(0, FIONREAD, &cnt);
36 error += tcsetattr(0, TCSANOW, &Otty);
37 }
38
39 return ( error == 0 ? cnt : -1 );
40 }
41
42 #else
43 #include <conio.h>
44 int ukbhit(void) {
45 return kbhit();
46 }
47 #endif
48
49 // log files functions
50 void AddLogLine(char *file, char *extData, char *c) {
51 FILE *f = NULL;
52 char filename[FILE_PATH_SIZE] = {0x00};
53 int len = 0;
54
55 len = strlen(file);
56 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
57 memcpy(filename, file, len);
58
59 f = fopen(filename, "a");
60 if (!f) {
61 printf("Could not append log file %s", filename);
62 return;
63 }
64
65 fprintf(f, "%s", extData);
66 fprintf(f, "%s\n", c);
67 fflush(f);
68 fclose(f);
69 }
70
71 void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
72 AddLogLine(fileName, extData, sprint_hex(data, len));
73 }
74
75 void AddLogUint64(char *fileName, char *extData, const uint64_t data) {
76 char buf[20] = {0};
77 memset(buf, 0x00, sizeof(buf));
78 //sprintf(buf, "%X%X", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
79 sprintf(buf, "%012"llx"", data);
80 AddLogLine(fileName, extData, buf);
81 }
82
83 void AddLogCurrentDT(char *fileName) {
84 char buf[20];
85 memset(buf, 0x00, sizeof(buf));
86 struct tm *curTime;
87 time_t now = time(0);
88 curTime = gmtime(&now);
89 strftime (buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", curTime);
90 AddLogLine(fileName, "\nanticollision: ", buf);
91 }
92
93 void FillFileNameByUID(char *fileName, uint8_t *uid, char *ext, int byteCount) {
94 if ( fileName == NULL || uid == NULL || ext == NULL ){
95 printf("error: parameter is NULL\n");
96 return;
97 }
98 char * fnameptr = fileName;
99 memset(fileName, 0x00, FILE_PATH_SIZE);
100
101 for (int j = 0; j < byteCount; j++, fnameptr += 2)
102 sprintf(fnameptr, "%02X", uid[j]);
103 sprintf(fnameptr, "%s", ext);
104 }
105
106 // printing and converting functions
107 void print_hex(const uint8_t * data, const size_t len) {
108 size_t i;
109 for (i=0; i < len; ++i)
110 printf("%02x ", data[i]);
111 printf("\n");
112 }
113
114 void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
115
116 int rownum = 0;
117 printf("[%02d] | ", rownum);
118 for (int i = 0; i < len; ++i) {
119
120 printf("%02X ", data[i]);
121
122 // check if a line break is needed
123 if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
124 ++rownum;
125 printf("\n[%02d] | ", rownum);
126 }
127 }
128 printf("\n");
129 }
130
131 char *sprint_hex(const uint8_t *data, const size_t len) {
132
133 int maxLen = ( len > 1024/3) ? 1024/3 : len;
134 static char buf[1024];
135 memset(buf, 0x00, 1024);
136 char * tmp = buf;
137 size_t i;
138
139 for (i=0; i < maxLen; ++i, tmp += 3)
140 sprintf(tmp, "%02X ", data[i]);
141 return buf;
142 }
143
144 char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
145
146 // make sure we don't go beyond our char array memory
147 size_t in_index = 0, out_index = 0;
148 int max_len;
149 if (breaks==0)
150 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
151 else
152 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
153
154 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
155 //clear memory
156 memset(buf, 0x00, sizeof(buf));
157 char *tmp = buf;
158
159 // loop through the out_index to make sure we don't go too far
160 for (out_index=0; out_index < max_len-2; out_index++) {
161 // set character
162 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
163 // check if a line break is needed and we have room to print it in our array
164 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
165 // increment and print line break
166 out_index++;
167 sprintf(tmp++, "%s","\n");
168 }
169 in_index++;
170 }
171 // last char.
172 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
173 return buf;
174 }
175
176 char *sprint_bin(const uint8_t *data, const size_t len) {
177 return sprint_bin_break(data, len, 0);
178 }
179
180 char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
181 static char buf[1024];
182 char *tmp = buf;
183 memset(buf, 0x00, 1024);
184 size_t max_len = (len > 1010) ? 1010 : len;
185 sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);
186 return buf;
187 }
188
189 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
190 while (len--) {
191 dest[len] = (uint8_t) n;
192 n >>= 8;
193 }
194 }
195
196 uint64_t bytes_to_num(uint8_t* src, size_t len) {
197 uint64_t num = 0;
198 while (len--) {
199 num = (num << 8) | (*src);
200 src++;
201 }
202 return num;
203 }
204
205 // takes a number (uint64_t) and creates a binarray in dest.
206 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
207 while (len--) {
208 dest[len] = n & 1;
209 n >>= 1;
210 }
211 }
212
213 //least significant bit first
214 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
215 for(int i = 0 ; i < len ; ++i) {
216 dest[i] = n & 1;
217 n >>= 1;
218 }
219 }
220
221 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
222 // to
223 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
224 // up to 64 bytes or 512 bits
225 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
226 uint8_t buf[64];
227 memset(buf, 0x00, 64);
228 uint8_t *tmp = buf;
229 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
230 for (size_t i = 0; i < blockSize; i++){
231 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
232 }
233 }
234 return tmp;
235 }
236
237 // takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
238 // returns: the dest array contains the reordered src array.
239 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
240 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
241 for (size_t i = 0; i < blockSize; i++){
242 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
243 }
244 }
245 }
246
247 // -------------------------------------------------------------------------
248 // string parameters lib
249 // -------------------------------------------------------------------------
250
251 // -------------------------------------------------------------------------
252 // line - param line
253 // bg, en - symbol numbers in param line of beginning an ending parameter
254 // paramnum - param number (from 0)
255 // -------------------------------------------------------------------------
256 int param_getptr(const char *line, int *bg, int *en, int paramnum)
257 {
258 int i;
259 int len = strlen(line);
260
261 *bg = 0;
262 *en = 0;
263
264 // skip spaces
265 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
266 if (*bg >= len) {
267 return 1;
268 }
269
270 for (i = 0; i < paramnum; i++) {
271 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
272 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
273
274 if (line[*bg] == '\0') return 1;
275 }
276
277 *en = *bg;
278 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
279
280 (*en)--;
281
282 return 0;
283 }
284
285
286 char param_getchar(const char *line, int paramnum)
287 {
288 int bg, en;
289
290 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
291
292 return line[bg];
293 }
294
295 uint8_t param_get8(const char *line, int paramnum)
296 {
297 return param_get8ex(line, paramnum, 0, 10);
298 }
299
300 /**
301 * @brief Reads a decimal integer (actually, 0-254, not 255)
302 * @param line
303 * @param paramnum
304 * @return -1 if error
305 */
306 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
307 {
308 uint8_t val = param_get8ex(line, paramnum, 255, 10);
309 if( (int8_t) val == -1) return 1;
310 (*destination) = val;
311 return 0;
312 }
313 /**
314 * @brief Checks if param is decimal
315 * @param line
316 * @param paramnum
317 * @return
318 */
319 uint8_t param_isdec(const char *line, int paramnum)
320 {
321 int bg, en;
322 //TODO, check more thorougly
323 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
324 // return strtoul(&line[bg], NULL, 10) & 0xff;
325
326 return 0;
327 }
328
329 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
330 {
331 int bg, en;
332
333 if (!param_getptr(line, &bg, &en, paramnum))
334 return strtoul(&line[bg], NULL, base) & 0xff;
335 else
336 return deflt;
337 }
338
339 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
340 {
341 int bg, en;
342
343 if (!param_getptr(line, &bg, &en, paramnum))
344 return strtoul(&line[bg], NULL, base);
345 else
346 return deflt;
347 }
348
349 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
350 {
351 int bg, en;
352
353 if (!param_getptr(line, &bg, &en, paramnum))
354 return strtoull(&line[bg], NULL, base);
355 else
356 return deflt;
357
358 return 0;
359 }
360
361 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
362 {
363 int bg, en, temp, i;
364
365 if (hexcnt & 1) return 1;
366
367 if (param_getptr(line, &bg, &en, paramnum)) return 1;
368
369 if (en - bg + 1 != hexcnt) return 1;
370
371 for(i = 0; i < hexcnt; i += 2) {
372 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
373
374 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
375 data[i / 2] = temp & 0xff;
376 }
377
378 return 0;
379 }
380 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
381 {
382 int bg, en, temp, i;
383
384 //if (hexcnt % 2)
385 // return 1;
386
387 if (param_getptr(line, &bg, &en, paramnum)) return 1;
388
389 *hexcnt = en - bg + 1;
390 if (*hexcnt % 2) //error if not complete hex bytes
391 return 1;
392
393 for(i = 0; i < *hexcnt; i += 2) {
394 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
395
396 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
397 data[i / 2] = temp & 0xff;
398 }
399
400 return 0;
401 }
402 int param_getstr(const char *line, int paramnum, char * str)
403 {
404 int bg, en;
405
406 if (param_getptr(line, &bg, &en, paramnum)) return 0;
407
408 memcpy(str, line + bg, en - bg + 1);
409 str[en - bg + 1] = 0;
410
411 return en - bg + 1;
412 }
413
414 /*
415 The following methods comes from Rfidler sourcecode.
416 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
417 */
418
419 // convert hex to sequence of 0/1 bit values
420 // returns number of bits converted
421 int hextobinarray(char *target, char *source)
422 {
423 int length, i, count= 0;
424 char x;
425
426 length = strlen(source);
427 // process 4 bits (1 hex digit) at a time
428 while(length--)
429 {
430 x= *(source++);
431 // capitalize
432 if (x >= 'a' && x <= 'f')
433 x -= 32;
434 // convert to numeric value
435 if (x >= '0' && x <= '9')
436 x -= '0';
437 else if (x >= 'A' && x <= 'F')
438 x -= 'A' - 10;
439 else
440 return 0;
441 // output
442 for(i= 0 ; i < 4 ; ++i, ++count)
443 *(target++)= (x >> (3 - i)) & 1;
444 }
445
446 return count;
447 }
448
449 // convert hex to human readable binary string
450 int hextobinstring(char *target, char *source)
451 {
452 int length;
453
454 if(!(length= hextobinarray(target, source)))
455 return 0;
456 binarraytobinstring(target, target, length);
457 return length;
458 }
459
460 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
461 // return number of bits converted
462 int binarraytohex(char *target, char *source, int length)
463 {
464 unsigned char i, x;
465 int j = length;
466
467 if(j % 4)
468 return 0;
469
470 while(j)
471 {
472 for(i= x= 0 ; i < 4 ; ++i)
473 x += ( source[i] << (3 - i));
474 sprintf(target,"%X", x);
475 ++target;
476 source += 4;
477 j -= 4;
478 }
479 return length;
480 }
481
482 // convert binary array to human readable binary
483 void binarraytobinstring(char *target, char *source, int length)
484 {
485 int i;
486
487 for(i= 0 ; i < length ; ++i)
488 *(target++)= *(source++) + '0';
489 *target= '\0';
490 }
491
492 // return parity bit required to match type
493 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
494 {
495 int x;
496 for( x = 0 ; length > 0 ; --length)
497 x += bits[length - 1];
498 x %= 2;
499 return x ^ type;
500 }
501
502 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
503 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
504 {
505 *(target++)= GetParity(source, EVEN, length / 2);
506 memcpy(target, source, length);
507 target += length;
508 *(target)= GetParity(source + length / 2, ODD, length / 2);
509 }
510
511 // xor two arrays together for len items. The dst array contains the new xored values.
512 void xor(unsigned char * dst, unsigned char * src, size_t len) {
513 for( ; len > 0; len--,dst++,src++)
514 *dst ^= *src;
515 }
516
517 int32_t le24toh (uint8_t data[3]) {
518 return (data[2] << 16) | (data[1] << 8) | data[0];
519 }
520 uint32_t le32toh (uint8_t *data) {
521 return (uint32_t)( (data[3]<<24) | (data[2]<<16) | (data[1]<<8) | data[0]);
522 }
523 // Pack a bitarray into a uint32_t.
524 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
525
526 if (len > 32) return 0;
527
528 int i = start;
529 int j = len-1;
530 uint32_t tmp = 0;
531
532 for (; j >= 0; --j, ++i)
533 tmp |= bits[i] << j;
534
535 return tmp;
536 }
537
538 // RotateLeft - Ultralight, Desfire, works on byte level
539 // 00-01-02 >> 01-02-00
540 void rol(uint8_t *data, const size_t len){
541 uint8_t first = data[0];
542 for (size_t i = 0; i < len-1; i++) {
543 data[i] = data[i+1];
544 }
545 data[len-1] = first;
546 }
547
548 // Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
549 // And clears the rest of the bits.
550 uint32_t SwapBits(uint32_t value, int nrbits) {
551 uint32_t newvalue = 0;
552 for(int i = 0; i < nrbits; i++) {
553 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
554 }
555 return newvalue;
556 }
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