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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#define MAX_BIN_BREAK_LENGTH (3072+384+1)
13
14#ifndef _WIN32
15#include <termios.h>
16#include <sys/ioctl.h>
17
18int 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>
43int ukbhit(void) {
44 return kbhit();
45}
46#endif
47
48// log files functions
49void 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
69void AddLogHex(char *fileName, char *extData, const uint8_t * data, const size_t len){
70 AddLogLine(fileName, extData, sprint_hex(data, len));
71}
72
73void 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
79void 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
90void 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
100void 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}
106void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
107
108 int rownum = 0;
109 printf("[%02d] | ", rownum);
110 for (int i = 0; i < len; ++i) {
111
112 printf("%02X ", data[i]);
113
114 // check if a line break is needed
115 if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
116 ++rownum;
117 printf("\n[%02d] | ", rownum);
118 }
119 }
120 printf("\n");
121}
122
123char *sprint_hex(const uint8_t *data, const size_t len) {
124
125 int maxLen = ( len > 1024/3) ? 1024/3 : len;
126 static char buf[1024];
127 memset(buf, 0x00, 1024);
128 char * tmp = buf;
129 size_t i;
130
131 for (i=0; i < maxLen; ++i, tmp += 3)
132 sprintf(tmp, "%02X ", data[i]);
133
134 return buf;
135}
136
137char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
138 // make sure we don't go beyond our char array memory
139 int max_len;
140 if (breaks==0)
141 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
142 else
143 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
144
145 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
146 //clear memory
147 memset(buf, 0x00, sizeof(buf));
148 char *tmp = buf;
149
150 size_t in_index = 0;
151 // loop through the out_index to make sure we don't go too far
152 for (size_t out_index=0; out_index < max_len-2; out_index++) {
153 // set character
154 sprintf(tmp++, "%u", data[in_index]);
155 // check if a line break is needed and we have room to print it in our array
156 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
157 // increment and print line break
158 out_index++;
159 sprintf(tmp++, "%s","\n");
160 }
161 in_index++;
162 }
163
164 return buf;
165}
166
167char *sprint_bin(const uint8_t *data, const size_t len) {
168 return sprint_bin_break(data, len, 0);
169}
170
171char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
172 static char buf[1024];
173 char *tmp = buf;
174 memset(buf, 0x00, 1024);
175 size_t max_len = (len > 1010) ? 1010 : len;
176 sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);
177 return buf;
178}
179void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
180{
181 while (len--) {
182 dest[len] = (uint8_t) n;
183 n >>= 8;
184 }
185}
186
187uint64_t bytes_to_num(uint8_t* src, size_t len)
188{
189 uint64_t num = 0;
190 while (len--)
191 {
192 num = (num << 8) | (*src);
193 src++;
194 }
195 return num;
196}
197
198void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
199 while (len--) {
200 dest[len] = n & 1;
201 n >>= 1;
202 }
203}
204
205// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
206// to
207// hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
208// up to 64 bytes or 512 bits
209uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
210 uint8_t buf[64];
211 memset(buf, 0x00, 64);
212 uint8_t *tmp = buf;
213 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
214 for (size_t i = 0; i < blockSize; i++){
215 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
216 }
217 }
218 return tmp;
219}
220
221void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
222 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
223 for (size_t i = 0; i < blockSize; i++){
224 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
225 }
226 }
227}
228
229
230// -------------------------------------------------------------------------
231// string parameters lib
232// -------------------------------------------------------------------------
233
234// -------------------------------------------------------------------------
235// line - param line
236// bg, en - symbol numbers in param line of beginning an ending parameter
237// paramnum - param number (from 0)
238// -------------------------------------------------------------------------
239int param_getptr(const char *line, int *bg, int *en, int paramnum)
240{
241 int i;
242 int len = strlen(line);
243
244 *bg = 0;
245 *en = 0;
246
247 // skip spaces
248 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
249 if (*bg >= len) {
250 return 1;
251 }
252
253 for (i = 0; i < paramnum; i++) {
254 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
255 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
256
257 if (line[*bg] == '\0') return 1;
258 }
259
260 *en = *bg;
261 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
262
263 (*en)--;
264
265 return 0;
266}
267
268
269char param_getchar(const char *line, int paramnum)
270{
271 int bg, en;
272
273 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
274
275 return line[bg];
276}
277
278uint8_t param_get8(const char *line, int paramnum)
279{
280 return param_get8ex(line, paramnum, 0, 10);
281}
282
283/**
284 * @brief Reads a decimal integer (actually, 0-254, not 255)
285 * @param line
286 * @param paramnum
287 * @return -1 if error
288 */
289uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
290{
291 uint8_t val = param_get8ex(line, paramnum, 255, 10);
292 if( (int8_t) val == -1) return 1;
293 (*destination) = val;
294 return 0;
295}
296/**
297 * @brief Checks if param is decimal
298 * @param line
299 * @param paramnum
300 * @return
301 */
302uint8_t param_isdec(const char *line, int paramnum)
303{
304 int bg, en;
305 //TODO, check more thorougly
306 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
307 // return strtoul(&line[bg], NULL, 10) & 0xff;
308
309 return 0;
310}
311
312uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
313{
314 int bg, en;
315
316 if (!param_getptr(line, &bg, &en, paramnum))
317 return strtoul(&line[bg], NULL, base) & 0xff;
318 else
319 return deflt;
320}
321
322uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
323{
324 int bg, en;
325
326 if (!param_getptr(line, &bg, &en, paramnum))
327 return strtoul(&line[bg], NULL, base);
328 else
329 return deflt;
330}
331
332uint64_t param_get64ex(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 strtoull(&line[bg], NULL, base);
338 else
339 return deflt;
340
341 return 0;
342}
343
344int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
345{
346 int bg, en, temp, i;
347
348 if (hexcnt & 1) return 1;
349
350 if (param_getptr(line, &bg, &en, paramnum)) return 1;
351
352 if (en - bg + 1 != hexcnt) return 1;
353
354 for(i = 0; i < hexcnt; i += 2) {
355 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
356
357 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
358 data[i / 2] = temp & 0xff;
359 }
360
361 return 0;
362}
363int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
364{
365 int bg, en, temp, i;
366
367 //if (hexcnt % 2)
368 // return 1;
369
370 if (param_getptr(line, &bg, &en, paramnum)) return 1;
371
372 *hexcnt = en - bg + 1;
373 if (*hexcnt % 2) //error if not complete hex bytes
374 return 1;
375
376 for(i = 0; i < *hexcnt; i += 2) {
377 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
378
379 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
380 data[i / 2] = temp & 0xff;
381 }
382
383 return 0;
384}
385int param_getstr(const char *line, int paramnum, char * str)
386{
387 int bg, en;
388
389 if (param_getptr(line, &bg, &en, paramnum)) return 0;
390
391 memcpy(str, line + bg, en - bg + 1);
392 str[en - bg + 1] = 0;
393
394 return en - bg + 1;
395}
396
397/*
398The following methods comes from Rfidler sourcecode.
399https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
400*/
401
402// convert hex to sequence of 0/1 bit values
403// returns number of bits converted
404int hextobinarray(char *target, char *source)
405{
406 int length, i, count= 0;
407 char x;
408
409 length = strlen(source);
410 // process 4 bits (1 hex digit) at a time
411 while(length--)
412 {
413 x= *(source++);
414 // capitalize
415 if (x >= 'a' && x <= 'f')
416 x -= 32;
417 // convert to numeric value
418 if (x >= '0' && x <= '9')
419 x -= '0';
420 else if (x >= 'A' && x <= 'F')
421 x -= 'A' - 10;
422 else
423 return 0;
424 // output
425 for(i= 0 ; i < 4 ; ++i, ++count)
426 *(target++)= (x >> (3 - i)) & 1;
427 }
428
429 return count;
430}
431
432// convert hex to human readable binary string
433int hextobinstring(char *target, char *source)
434{
435 int length;
436
437 if(!(length= hextobinarray(target, source)))
438 return 0;
439 binarraytobinstring(target, target, length);
440 return length;
441}
442
443// convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
444// return number of bits converted
445int binarraytohex(char *target, char *source, int length)
446{
447 unsigned char i, x;
448 int j = length;
449
450 if(j % 4)
451 return 0;
452
453 while(j)
454 {
455 for(i= x= 0 ; i < 4 ; ++i)
456 x += ( source[i] << (3 - i));
457 sprintf(target,"%X", x);
458 ++target;
459 source += 4;
460 j -= 4;
461 }
462 return length;
463}
464
465// convert binary array to human readable binary
466void binarraytobinstring(char *target, char *source, int length)
467{
468 int i;
469
470 for(i= 0 ; i < length ; ++i)
471 *(target++)= *(source++) + '0';
472 *target= '\0';
473}
474
475// return parity bit required to match type
476uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
477{
478 int x;
479 for( x = 0 ; length > 0 ; --length)
480 x += bits[length - 1];
481 x %= 2;
482 return x ^ type;
483}
484
485// add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
486void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
487{
488 *(target++)= GetParity(source, EVEN, length / 2);
489 memcpy(target, source, length);
490 target += length;
491 *(target)= GetParity(source + length / 2, ODD, length / 2);
492}
493
494void xor(unsigned char * dst, unsigned char * src, size_t len) {
495 for( ; len > 0; len--,dst++,src++)
496 *dst ^= *src;
497}
498
499int32_t le24toh (uint8_t data[3]) {
500 return (data[2] << 16) | (data[1] << 8) | data[0];
501}
502
503uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
504
505 if (len > 32) return 0;
506
507 int i = start;
508 int j = len-1;
509 uint32_t tmp = 0;
510
511 for (; j >= 0; --j, ++i)
512 tmp |= bits[i] << j;
513
514 return tmp;
515}
516
517// RotateLeft - Ultralight, Desfire, works on byte level
518// 00-01-02 >> 01-02-00
519void rol(uint8_t *data, const size_t len){
520 uint8_t first = data[0];
521 for (size_t i = 0; i < len-1; i++) {
522 data[i] = data[i+1];
523 }
524 data[len-1] = first;
525}
526
527uint32_t SwapBits(uint32_t value, int nrbits) {
528 uint32_t newvalue = 0;
529 for(int i = 0; i < nrbits; i++) {
530 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
531 }
532 return newvalue;
533}
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