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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"
bf32dd92 12#define MAX_BIN_BREAK_LENGTH (3072+384+1)
534983d7 13
cb64309e 14#ifndef _WIN32
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15#include <termios.h>
16#include <sys/ioctl.h>
79544b28 17
3e134b4c 18int ukbhit(void) {
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19 int cnt = 0;
20 int error;
21 static struct termios Otty, Ntty;
22
d04b71c1 23 if ( tcgetattr( 0, &Otty) == -1) return -1;
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24 Ntty = Otty;
25
d04b71c1 26 Ntty.c_iflag = 0; /* input mode */
27 Ntty.c_oflag = 0; /* output mode */
28 Ntty.c_lflag &= ~ICANON; /* raw mode */
29 Ntty.c_cc[VMIN] = CMIN; /* minimum time to wait */
30 Ntty.c_cc[VTIME] = CTIME; /* minimum characters to wait for */
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31
32 if (0 == (error = tcsetattr(0, TCSANOW, &Ntty))) {
33 error += ioctl(0, FIONREAD, &cnt);
34 error += tcsetattr(0, TCSANOW, &Otty);
35 }
36
37 return ( error == 0 ? cnt : -1 );
38}
39
40#else
41#include <conio.h>
42int ukbhit(void) {
43 return kbhit();
44}
45#endif
46
55acbb2a 47// log files functions
b915fda3 48void AddLogLine(char *file, char *extData, char *c) {
c805748f 49 FILE *f = NULL;
b915fda3 50 char filename[FILE_PATH_SIZE] = {0x00};
51 int len = 0;
52
53 len = strlen(file);
54 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
55 memcpy(filename, file, len);
56
c805748f 57 f = fopen(filename, "a");
58 if (!f) {
b915fda3 59 printf("Could not append log file %s", filename);
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60 return;
61 }
62
c805748f 63 fprintf(f, "%s", extData);
64 fprintf(f, "%s\n", c);
65 fflush(f);
66 fclose(f);
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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) {
c805748f 74 char buf[20] = {0};
75 memset(buf, 0x00, sizeof(buf));
76 //sprintf(buf, "%X%X", (unsigned int)((data & 0xFFFFFFFF00000000) >> 32), (unsigned int)(data & 0xFFFFFFFF));
77 sprintf(buf, "%012"llx"", data);
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78 AddLogLine(fileName, extData, buf);
79}
80
81void AddLogCurrentDT(char *fileName) {
c805748f 82 char buf[20];
83 memset(buf, 0x00, sizeof(buf));
55acbb2a 84 struct tm *curTime;
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85 time_t now = time(0);
86 curTime = gmtime(&now);
c805748f 87 strftime (buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", curTime);
88 AddLogLine(fileName, "\nanticollision: ", buf);
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89}
90
c805748f 91void FillFileNameByUID(char *fileName, uint8_t *uid, char *ext, int byteCount) {
92 if ( fileName == NULL || uid == NULL || ext == NULL ){
93 printf("error: parameter is NULL\n");
94 return;
95 }
55acbb2a 96 char * fnameptr = fileName;
c805748f 97 memset(fileName, 0x00, FILE_PATH_SIZE);
55acbb2a 98
e0c635d1 99 for (int j = 0; j < byteCount; j++, fnameptr += 2)
c805748f 100 sprintf(fnameptr, "%02X", uid[j]);
55acbb2a 101 sprintf(fnameptr, "%s", ext);
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102}
103
104// printing and converting functions
9827020a 105void print_hex(const uint8_t * data, const size_t len) {
534983d7 106 size_t i;
9827020a 107 for (i=0; i < len; ++i)
534983d7 108 printf("%02x ", data[i]);
9827020a 109 printf("\n");
110}
0d2c5909 111
9827020a 112void print_hex_break(const uint8_t *data, const size_t len, uint8_t breaks) {
a1689f41 113
114 int rownum = 0;
115 printf("[%02d] | ", rownum);
116 for (int i = 0; i < len; ++i) {
534983d7 117
9827020a 118 printf("%02X ", data[i]);
119
120 // check if a line break is needed
a1689f41 121 if ( breaks > 0 && !((i+1) % breaks) && (i+1 < len) ) {
122 ++rownum;
123 printf("\n[%02d] | ", rownum);
124 }
9827020a 125 }
534983d7 126 printf("\n");
127}
128
334cc089 129char *sprint_hex(const uint8_t *data, const size_t len) {
b915fda3 130
131 int maxLen = ( len > 1024/3) ? 1024/3 : len;
534983d7 132 static char buf[1024];
334cc089 133 memset(buf, 0x00, 1024);
534983d7 134 char * tmp = buf;
135 size_t i;
136
b915fda3 137 for (i=0; i < maxLen; ++i, tmp += 3)
334cc089 138 sprintf(tmp, "%02X ", data[i]);
534983d7 139 return buf;
140}
f89c7050 141
2767fc02 142char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
581b31fb 143
bf32dd92 144 // make sure we don't go beyond our char array memory
581b31fb 145 size_t in_index = 0, out_index = 0;
146 int max_len;
0c97a456 147 if (breaks==0)
148 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
149 else
150 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
151
bf32dd92 152 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
153 //clear memory
154 memset(buf, 0x00, sizeof(buf));
2767fc02 155 char *tmp = buf;
79544b28 156
bf32dd92 157 // loop through the out_index to make sure we don't go too far
581b31fb 158 for (out_index=0; out_index < max_len-2; out_index++) {
bf32dd92 159 // set character
05164399 160 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
9332b857 161 // check if a line break is needed and we have room to print it in our array
bf32dd92 162 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
163 // increment and print line break
164 out_index++;
2767fc02 165 sprintf(tmp++, "%s","\n");
581b31fb 166 }
bf32dd92 167 in_index++;
168 }
581b31fb 169 // last char.
170 sprintf(tmp++, "%u", (unsigned int) data[in_index]);
79544b28 171 return buf;
172}
173
2767fc02 174char *sprint_bin(const uint8_t *data, const size_t len) {
175 return sprint_bin_break(data, len, 0);
176}
0c97a456 177
178char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
179 static char buf[1024];
508b37ba 180 char *tmp = buf;
9827020a 181 memset(buf, 0x00, 1024);
182 size_t max_len = (len > 1010) ? 1010 : len;
183 sprintf(tmp, "%s| %s", sprint_hex(data, max_len) , data);
0c97a456 184 return buf;
185}
0d2c5909 186
1f1d974f 187void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
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188 while (len--) {
189 dest[len] = (uint8_t) n;
190 n >>= 8;
191 }
192}
193
1f1d974f 194uint64_t bytes_to_num(uint8_t* src, size_t len) {
f89c7050 195 uint64_t num = 0;
1f1d974f 196 while (len--) {
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197 num = (num << 8) | (*src);
198 src++;
199 }
200 return num;
201}
f397b5cc 202
0d2c5909 203// takes a number (uint64_t) and creates a binarray in dest.
204void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
a126332a 205 while (len--) {
206 dest[len] = n & 1;
207 n >>= 1;
208 }
209}
1f1d974f 210
0d2c5909 211//least significant bit first
c805748f 212void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
0d2c5909 213 for(int i = 0 ; i < len ; ++i) {
214 dest[i] = n & 1;
215 n >>= 1;
216 }
217}
218
e1c88b09 219// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
220// to
221// hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
222// up to 64 bytes or 512 bits
224e8c1a 223uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
3f5bcc3b 224 static uint8_t buf[64];
224e8c1a 225 memset(buf, 0x00, 64);
226 uint8_t *tmp = buf;
227 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
228 for (size_t i = 0; i < blockSize; i++){
229 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
e1c88b09 230 }
231 }
3f5bcc3b 232 return buf;
e1c88b09 233}
234
0d2c5909 235// takes a uint8_t src array, for len items and reverses the byte order in blocksizes (8,16,32,64),
236// returns: the dest array contains the reordered src array.
f4d0ffd1 237void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
238 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
239 for (size_t i = 0; i < blockSize; i++){
240 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
241 }
242 }
243}
244
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245// -------------------------------------------------------------------------
246// string parameters lib
247// -------------------------------------------------------------------------
248
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249// -------------------------------------------------------------------------
250// line - param line
251// bg, en - symbol numbers in param line of beginning an ending parameter
252// paramnum - param number (from 0)
253// -------------------------------------------------------------------------
254int param_getptr(const char *line, int *bg, int *en, int paramnum)
255{
256 int i;
257 int len = strlen(line);
258
259 *bg = 0;
260 *en = 0;
261
262 // skip spaces
263 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
264 if (*bg >= len) {
265 return 1;
266 }
267
268 for (i = 0; i < paramnum; i++) {
269 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
270 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
271
272 if (line[*bg] == '\0') return 1;
273 }
274
275 *en = *bg;
276 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
277
278 (*en)--;
279
280 return 0;
281}
282
283char param_getchar(const char *line, int paramnum)
284{
285 int bg, en;
286
287 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
288
289 return line[bg];
290}
291
292uint8_t param_get8(const char *line, int paramnum)
293{
60e86577 294 return param_get8ex(line, paramnum, 0, 10);
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295}
296
f6d9fb17 297/**
31abe49f 298 * @brief Reads a decimal integer (actually, 0-254, not 255)
f6d9fb17
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299 * @param line
300 * @param paramnum
31abe49f 301 * @return -1 if error
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302 */
303uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
304{
31abe49f 305 uint8_t val = param_get8ex(line, paramnum, 255, 10);
31abe49f 306 if( (int8_t) val == -1) return 1;
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307 (*destination) = val;
308 return 0;
309}
310/**
311 * @brief Checks if param is decimal
312 * @param line
313 * @param paramnum
314 * @return
315 */
316uint8_t param_isdec(const char *line, int paramnum)
317{
318 int bg, en;
319 //TODO, check more thorougly
320 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
321 // return strtoul(&line[bg], NULL, 10) & 0xff;
322
323 return 0;
324}
325
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326uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
327{
328 int bg, en;
329
330 if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1 331 return strtoul(&line[bg], NULL, base) & 0xff;
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332 else
333 return deflt;
334}
335
336uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
337{
338 int bg, en;
339
340 if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1 341 return strtoul(&line[bg], NULL, base);
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342 else
343 return deflt;
344}
345
346uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
347{
348 int bg, en;
349
350 if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1 351 return strtoull(&line[bg], NULL, base);
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352 else
353 return deflt;
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354}
355
356int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
357{
358 int bg, en, temp, i;
359
508b37ba 360 if (hexcnt & 1) return 1;
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361
362 if (param_getptr(line, &bg, &en, paramnum)) return 1;
363
508b37ba 364 if (en - bg + 1 != hexcnt) return 1;
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365
366 for(i = 0; i < hexcnt; i += 2) {
367 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
368
369 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
370 data[i / 2] = temp & 0xff;
371 }
372
373 return 0;
374}
e98572a1 375int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
376{
377 int bg, en, temp, i;
378
379 //if (hexcnt % 2)
380 // return 1;
381
382 if (param_getptr(line, &bg, &en, paramnum)) return 1;
383
384 *hexcnt = en - bg + 1;
385 if (*hexcnt % 2) //error if not complete hex bytes
386 return 1;
aea4d766 387
e98572a1 388 for(i = 0; i < *hexcnt; i += 2) {
3bc7b13d 389 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
e98572a1 390
391 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
392 data[i / 2] = temp & 0xff;
393 }
394
395 return 0;
396}
aea4d766 397int param_getstr(const char *line, int paramnum, char * str)
398{
399 int bg, en;
400
401 if (param_getptr(line, &bg, &en, paramnum)) return 0;
402
403 memcpy(str, line + bg, en - bg + 1);
404 str[en - bg + 1] = 0;
405
406 return en - bg + 1;
407}
79544b28 408
409/*
410The following methods comes from Rfidler sourcecode.
411https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
412*/
413
414// convert hex to sequence of 0/1 bit values
415// returns number of bits converted
416int hextobinarray(char *target, char *source)
417{
418 int length, i, count= 0;
419 char x;
420
421 length = strlen(source);
422 // process 4 bits (1 hex digit) at a time
423 while(length--)
424 {
425 x= *(source++);
426 // capitalize
427 if (x >= 'a' && x <= 'f')
428 x -= 32;
429 // convert to numeric value
430 if (x >= '0' && x <= '9')
431 x -= '0';
432 else if (x >= 'A' && x <= 'F')
433 x -= 'A' - 10;
434 else
435 return 0;
436 // output
437 for(i= 0 ; i < 4 ; ++i, ++count)
438 *(target++)= (x >> (3 - i)) & 1;
439 }
440
441 return count;
442}
443
444// convert hex to human readable binary string
445int hextobinstring(char *target, char *source)
446{
447 int length;
448
449 if(!(length= hextobinarray(target, source)))
450 return 0;
451 binarraytobinstring(target, target, length);
452 return length;
453}
454
455// convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
456// return number of bits converted
457int binarraytohex(char *target, char *source, int length)
458{
459 unsigned char i, x;
460 int j = length;
461
462 if(j % 4)
463 return 0;
464
465 while(j)
466 {
467 for(i= x= 0 ; i < 4 ; ++i)
468 x += ( source[i] << (3 - i));
469 sprintf(target,"%X", x);
470 ++target;
471 source += 4;
472 j -= 4;
473 }
474 return length;
475}
476
477// convert binary array to human readable binary
478void binarraytobinstring(char *target, char *source, int length)
479{
480 int i;
481
482 for(i= 0 ; i < length ; ++i)
483 *(target++)= *(source++) + '0';
484 *target= '\0';
485}
486
487// return parity bit required to match type
a126332a 488uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
79544b28 489{
490 int x;
ab7bb494 491 for( x = 0 ; length > 0 ; --length)
79544b28 492 x += bits[length - 1];
493 x %= 2;
79544b28 494 return x ^ type;
495}
496
497// add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
a126332a 498void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
79544b28 499{
500 *(target++)= GetParity(source, EVEN, length / 2);
501 memcpy(target, source, length);
502 target += length;
503 *(target)= GetParity(source + length / 2, ODD, length / 2);
504}
c3c241f3 505
0d2c5909 506// xor two arrays together for len items. The dst array contains the new xored values.
c3c241f3 507void xor(unsigned char * dst, unsigned char * src, size_t len) {
508 for( ; len > 0; len--,dst++,src++)
509 *dst ^= *src;
510}
511
512int32_t le24toh (uint8_t data[3]) {
513 return (data[2] << 16) | (data[1] << 8) | data[0];
514}
c805748f 515uint32_t le32toh (uint8_t *data) {
516 return (uint32_t)( (data[3]<<24) | (data[2]<<16) | (data[1]<<8) | data[0]);
517}
0d2c5909 518// Pack a bitarray into a uint32_t.
ad6219fc 519uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
9984b173 520
521 if (len > 32) return 0;
ad6219fc 522
523 int i = start;
524 int j = len-1;
ad6219fc 525 uint32_t tmp = 0;
9984b173 526
ad6219fc 527 for (; j >= 0; --j, ++i)
528 tmp |= bits[i] << j;
529
530 return tmp;
531}
9984b173 532
ab7bb494 533// RotateLeft - Ultralight, Desfire, works on byte level
534// 00-01-02 >> 01-02-00
6bb7609c 535void rol(uint8_t *data, const size_t len){
9984b173 536 uint8_t first = data[0];
537 for (size_t i = 0; i < len-1; i++) {
538 data[i] = data[i+1];
539 }
540 data[len-1] = first;
6bb7609c 541}
542
0d2c5909 543// Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
1f1d974f 544// And clears the rest of the bits.
6bb7609c 545uint32_t SwapBits(uint32_t value, int nrbits) {
546 uint32_t newvalue = 0;
547 for(int i = 0; i < nrbits; i++) {
548 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
549 }
550 return newvalue;
3e134b4c 551}
552/*
553 ref http://www.csm.ornl.gov/~dunigan/crc.html
554 Returns the value v with the bottom b [0,32] bits reflected.
555 Example: reflect(0x3e23L,3) == 0x3e26
556*/
557uint32_t reflect(uint32_t v, int b) {
558 uint32_t t = v;
559 for ( int i = 0; i < b; ++i) {
560 if (t & 1)
561 v |= BITMASK((b-1)-i);
562 else
563 v &= ~BITMASK((b-1)-i);
564 t>>=1;
565 }
566 return v;
567}
dae31af2 568
569uint64_t HornerScheme(uint64_t num, uint64_t divider, uint64_t factor) {
570 uint64_t remainder=0, quotient=0, result=0;
571 remainder = num % divider;
572 quotient = num / divider;
573 if(!(quotient == 0 && remainder == 0))
574 result += HornerScheme(quotient, divider, factor) * factor + remainder;
575 return result;
576}
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