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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 {
191 while (len--) {
192 dest[len] = (uint8_t) n;
193 n >>= 8;
194 }
195 }
196
197 uint64_t bytes_to_num(uint8_t* src, size_t len)
198 {
199 uint64_t num = 0;
200 while (len--)
201 {
202 num = (num << 8) | (*src);
203 src++;
204 }
205 return num;
206 }
207
208 // takes a number (uint64_t) and creates a binarray in dest.
209 void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
210 while (len--) {
211 dest[len] = n & 1;
212 n >>= 1;
213 }
214 }
215 //least significant bit first
216 void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
217 for(int i = 0 ; i < len ; ++i) {
218 dest[i] = n & 1;
219 n >>= 1;
220 }
221 }
222
223
224 // aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
225 // to
226 // hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
227 // up to 64 bytes or 512 bits
228 uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
229 uint8_t buf[64];
230 memset(buf, 0x00, 64);
231 uint8_t *tmp = buf;
232 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
233 for (size_t i = 0; i < blockSize; i++){
234 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
235 }
236 }
237 return tmp;
238 }
239
240 // takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
241 // returns: the dest array contains the reordered src array.
242 void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
243 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
244 for (size_t i = 0; i < blockSize; i++){
245 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
246 }
247 }
248 }
249
250 // -------------------------------------------------------------------------
251 // string parameters lib
252 // -------------------------------------------------------------------------
253
254 // -------------------------------------------------------------------------
255 // line - param line
256 // bg, en - symbol numbers in param line of beginning an ending parameter
257 // paramnum - param number (from 0)
258 // -------------------------------------------------------------------------
259 int param_getptr(const char *line, int *bg, int *en, int paramnum)
260 {
261 int i;
262 int len = strlen(line);
263
264 *bg = 0;
265 *en = 0;
266
267 // skip spaces
268 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
269 if (*bg >= len) {
270 return 1;
271 }
272
273 for (i = 0; i < paramnum; i++) {
274 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
275 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
276
277 if (line[*bg] == '\0') return 1;
278 }
279
280 *en = *bg;
281 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
282
283 (*en)--;
284
285 return 0;
286 }
287
288
289 char param_getchar(const char *line, int paramnum)
290 {
291 int bg, en;
292
293 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
294
295 return line[bg];
296 }
297
298 uint8_t param_get8(const char *line, int paramnum)
299 {
300 return param_get8ex(line, paramnum, 0, 10);
301 }
302
303 /**
304 * @brief Reads a decimal integer (actually, 0-254, not 255)
305 * @param line
306 * @param paramnum
307 * @return -1 if error
308 */
309 uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
310 {
311 uint8_t val = param_get8ex(line, paramnum, 255, 10);
312 if( (int8_t) val == -1) return 1;
313 (*destination) = val;
314 return 0;
315 }
316 /**
317 * @brief Checks if param is decimal
318 * @param line
319 * @param paramnum
320 * @return
321 */
322 uint8_t param_isdec(const char *line, int paramnum)
323 {
324 int bg, en;
325 //TODO, check more thorougly
326 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
327 // return strtoul(&line[bg], NULL, 10) & 0xff;
328
329 return 0;
330 }
331
332 uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
333 {
334 int bg, en;
335
336 if (!param_getptr(line, &bg, &en, paramnum))
337 return strtoul(&line[bg], NULL, base) & 0xff;
338 else
339 return deflt;
340 }
341
342 uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
343 {
344 int bg, en;
345
346 if (!param_getptr(line, &bg, &en, paramnum))
347 return strtoul(&line[bg], NULL, base);
348 else
349 return deflt;
350 }
351
352 uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
353 {
354 int bg, en;
355
356 if (!param_getptr(line, &bg, &en, paramnum))
357 return strtoull(&line[bg], NULL, base);
358 else
359 return deflt;
360
361 return 0;
362 }
363
364 int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
365 {
366 int bg, en, temp, i;
367
368 if (hexcnt & 1) return 1;
369
370 if (param_getptr(line, &bg, &en, paramnum)) return 1;
371
372 if (en - bg + 1 != hexcnt) return 1;
373
374 for(i = 0; i < hexcnt; i += 2) {
375 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
376
377 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
378 data[i / 2] = temp & 0xff;
379 }
380
381 return 0;
382 }
383 int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
384 {
385 int bg, en, temp, i;
386
387 //if (hexcnt % 2)
388 // return 1;
389
390 if (param_getptr(line, &bg, &en, paramnum)) return 1;
391
392 *hexcnt = en - bg + 1;
393 if (*hexcnt % 2) //error if not complete hex bytes
394 return 1;
395
396 for(i = 0; i < *hexcnt; i += 2) {
397 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
398
399 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
400 data[i / 2] = temp & 0xff;
401 }
402
403 return 0;
404 }
405 int param_getstr(const char *line, int paramnum, char * str)
406 {
407 int bg, en;
408
409 if (param_getptr(line, &bg, &en, paramnum)) return 0;
410
411 memcpy(str, line + bg, en - bg + 1);
412 str[en - bg + 1] = 0;
413
414 return en - bg + 1;
415 }
416
417 /*
418 The following methods comes from Rfidler sourcecode.
419 https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
420 */
421
422 // convert hex to sequence of 0/1 bit values
423 // returns number of bits converted
424 int hextobinarray(char *target, char *source)
425 {
426 int length, i, count= 0;
427 char x;
428
429 length = strlen(source);
430 // process 4 bits (1 hex digit) at a time
431 while(length--)
432 {
433 x= *(source++);
434 // capitalize
435 if (x >= 'a' && x <= 'f')
436 x -= 32;
437 // convert to numeric value
438 if (x >= '0' && x <= '9')
439 x -= '0';
440 else if (x >= 'A' && x <= 'F')
441 x -= 'A' - 10;
442 else
443 return 0;
444 // output
445 for(i= 0 ; i < 4 ; ++i, ++count)
446 *(target++)= (x >> (3 - i)) & 1;
447 }
448
449 return count;
450 }
451
452 // convert hex to human readable binary string
453 int hextobinstring(char *target, char *source)
454 {
455 int length;
456
457 if(!(length= hextobinarray(target, source)))
458 return 0;
459 binarraytobinstring(target, target, length);
460 return length;
461 }
462
463 // convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
464 // return number of bits converted
465 int binarraytohex(char *target, char *source, int length)
466 {
467 unsigned char i, x;
468 int j = length;
469
470 if(j % 4)
471 return 0;
472
473 while(j)
474 {
475 for(i= x= 0 ; i < 4 ; ++i)
476 x += ( source[i] << (3 - i));
477 sprintf(target,"%X", x);
478 ++target;
479 source += 4;
480 j -= 4;
481 }
482 return length;
483 }
484
485 // convert binary array to human readable binary
486 void binarraytobinstring(char *target, char *source, int length)
487 {
488 int i;
489
490 for(i= 0 ; i < length ; ++i)
491 *(target++)= *(source++) + '0';
492 *target= '\0';
493 }
494
495 // return parity bit required to match type
496 uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
497 {
498 int x;
499 for( x = 0 ; length > 0 ; --length)
500 x += bits[length - 1];
501 x %= 2;
502 return x ^ type;
503 }
504
505 // add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
506 void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
507 {
508 *(target++)= GetParity(source, EVEN, length / 2);
509 memcpy(target, source, length);
510 target += length;
511 *(target)= GetParity(source + length / 2, ODD, length / 2);
512 }
513
514 // xor two arrays together for len items. The dst array contains the new xored values.
515 void xor(unsigned char * dst, unsigned char * src, size_t len) {
516 for( ; len > 0; len--,dst++,src++)
517 *dst ^= *src;
518 }
519
520 int32_t le24toh (uint8_t data[3]) {
521 return (data[2] << 16) | (data[1] << 8) | data[0];
522 }
523 uint32_t le32toh (uint8_t *data) {
524 return (uint32_t)( (data[3]<<24) | (data[2]<<16) | (data[1]<<8) | data[0]);
525 }
526 // Pack a bitarray into a uint32_t.
527 uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
528
529 if (len > 32) return 0;
530
531 int i = start;
532 int j = len-1;
533 uint32_t tmp = 0;
534
535 for (; j >= 0; --j, ++i)
536 tmp |= bits[i] << j;
537
538 return tmp;
539 }
540
541 // RotateLeft - Ultralight, Desfire, works on byte level
542 // 00-01-02 >> 01-02-00
543 void rol(uint8_t *data, const size_t len){
544 uint8_t first = data[0];
545 for (size_t i = 0; i < len-1; i++) {
546 data[i] = data[i+1];
547 }
548 data[len-1] = first;
549 }
550
551 // Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
552 uint32_t SwapBits(uint32_t value, int nrbits) {
553 uint32_t newvalue = 0;
554 for(int i = 0; i < nrbits; i++) {
555 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
556 }
557 return newvalue;
558 }
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