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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
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18int ukbhit(void)
19{
20 int cnt = 0;
21 int error;
22 static struct termios Otty, Ntty;
23
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24 tcgetattr( 0, &Otty);
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
55acbb2a 48// log files functions
b915fda3 49void AddLogLine(char *file, char *extData, char *c) {
55acbb2a 50 FILE *fLog = NULL;
b915fda3 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");
55acbb2a 59 if (!fLog) {
b915fda3 60 printf("Could not append log file %s", filename);
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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
e0c635d1 90void FillFileNameByUID(char *fileName, uint8_t * uid, char *ext, int byteCount) {
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91 char * fnameptr = fileName;
92 memset(fileName, 0x00, 200);
93
e0c635d1 94 for (int j = 0; j < byteCount; j++, fnameptr += 2)
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95 sprintf(fnameptr, "%02x", uid[j]);
96 sprintf(fnameptr, "%s", ext);
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97}
98
99// printing and converting functions
f397b5cc 100
534983d7 101void print_hex(const uint8_t * data, const size_t len)
102{
103 size_t i;
104
105 for (i=0; i < len; i++)
106 printf("%02x ", data[i]);
107
108 printf("\n");
109}
110
334cc089 111char *sprint_hex(const uint8_t *data, const size_t len) {
b915fda3 112
113 int maxLen = ( len > 1024/3) ? 1024/3 : len;
534983d7 114 static char buf[1024];
334cc089 115 memset(buf, 0x00, 1024);
534983d7 116 char * tmp = buf;
117 size_t i;
118
b915fda3 119 for (i=0; i < maxLen; ++i, tmp += 3)
334cc089 120 sprintf(tmp, "%02X ", data[i]);
534983d7 121
122 return buf;
123}
f89c7050 124
2767fc02 125char *sprint_bin_break(const uint8_t *data, const size_t len, const uint8_t breaks) {
bf32dd92 126 // make sure we don't go beyond our char array memory
0c97a456 127 int max_len;
128 if (breaks==0)
129 max_len = ( len > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len;
130 else
131 max_len = ( len+(len/breaks) > MAX_BIN_BREAK_LENGTH ) ? MAX_BIN_BREAK_LENGTH : len+(len/breaks);
132
bf32dd92 133 static char buf[MAX_BIN_BREAK_LENGTH]; // 3072 + end of line characters if broken at 8 bits
134 //clear memory
135 memset(buf, 0x00, sizeof(buf));
2767fc02 136 char *tmp = buf;
79544b28 137
bf32dd92 138 size_t in_index = 0;
139 // loop through the out_index to make sure we don't go too far
ab7bb494 140 for (size_t out_index=0; out_index < max_len-2; out_index++) {
bf32dd92 141 // set character
142 sprintf(tmp++, "%u", data[in_index]);
9332b857 143 // check if a line break is needed and we have room to print it in our array
bf32dd92 144 if ( (breaks > 0) && !((in_index+1) % breaks) && (out_index+1 != max_len) ) {
145 // increment and print line break
146 out_index++;
2767fc02 147 sprintf(tmp++, "%s","\n");
148 }
bf32dd92 149 in_index++;
150 }
79544b28 151
152 return buf;
153}
154
2767fc02 155char *sprint_bin(const uint8_t *data, const size_t len) {
156 return sprint_bin_break(data, len, 0);
157}
0c97a456 158
159char *sprint_hex_ascii(const uint8_t *data, const size_t len) {
160 static char buf[1024];
161 memset(buf, 0x00, 1024);
508b37ba 162 char *tmp = buf;
163 sprintf(tmp, "%s| %s", sprint_hex(data, len) , data);
0c97a456 164 return buf;
165}
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166void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
167{
168 while (len--) {
169 dest[len] = (uint8_t) n;
170 n >>= 8;
171 }
172}
173
174uint64_t bytes_to_num(uint8_t* src, size_t len)
175{
176 uint64_t num = 0;
177 while (len--)
178 {
179 num = (num << 8) | (*src);
180 src++;
181 }
182 return num;
183}
f397b5cc 184
a126332a 185void num_to_bytebits(uint64_t n, size_t len, uint8_t *dest) {
186 while (len--) {
187 dest[len] = n & 1;
188 n >>= 1;
189 }
190}
191
e1c88b09 192// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
193// to
194// hh,gg,ff,ee,dd,cc,bb,aa, pp,oo,nn,mm,ll,kk,jj,ii
195// up to 64 bytes or 512 bits
224e8c1a 196uint8_t *SwapEndian64(const uint8_t *src, const size_t len, const uint8_t blockSize){
f4d0ffd1 197 uint8_t buf[64];
224e8c1a 198 memset(buf, 0x00, 64);
199 uint8_t *tmp = buf;
200 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
201 for (size_t i = 0; i < blockSize; i++){
202 tmp[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
e1c88b09 203 }
204 }
224e8c1a 205 return tmp;
e1c88b09 206}
207
f4d0ffd1 208void SwapEndian64ex(const uint8_t *src, const size_t len, const uint8_t blockSize, uint8_t *dest){
209 for (uint8_t block=0; block < (uint8_t)(len/blockSize); block++){
210 for (size_t i = 0; i < blockSize; i++){
211 dest[i+(blockSize*block)] = src[(blockSize-1-i)+(blockSize*block)];
212 }
213 }
214}
215
216
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217// -------------------------------------------------------------------------
218// string parameters lib
219// -------------------------------------------------------------------------
220
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221// -------------------------------------------------------------------------
222// line - param line
223// bg, en - symbol numbers in param line of beginning an ending parameter
224// paramnum - param number (from 0)
225// -------------------------------------------------------------------------
226int param_getptr(const char *line, int *bg, int *en, int paramnum)
227{
228 int i;
229 int len = strlen(line);
230
231 *bg = 0;
232 *en = 0;
233
234 // skip spaces
235 while (line[*bg] ==' ' || line[*bg]=='\t') (*bg)++;
236 if (*bg >= len) {
237 return 1;
238 }
239
240 for (i = 0; i < paramnum; i++) {
241 while (line[*bg]!=' ' && line[*bg]!='\t' && line[*bg] != '\0') (*bg)++;
242 while (line[*bg]==' ' || line[*bg]=='\t') (*bg)++;
243
244 if (line[*bg] == '\0') return 1;
245 }
246
247 *en = *bg;
248 while (line[*en] != ' ' && line[*en] != '\t' && line[*en] != '\0') (*en)++;
249
250 (*en)--;
251
252 return 0;
253}
254
31abe49f 255
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256char param_getchar(const char *line, int paramnum)
257{
258 int bg, en;
259
260 if (param_getptr(line, &bg, &en, paramnum)) return 0x00;
261
262 return line[bg];
263}
264
265uint8_t param_get8(const char *line, int paramnum)
266{
60e86577 267 return param_get8ex(line, paramnum, 0, 10);
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268}
269
f6d9fb17 270/**
31abe49f 271 * @brief Reads a decimal integer (actually, 0-254, not 255)
f6d9fb17
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272 * @param line
273 * @param paramnum
31abe49f 274 * @return -1 if error
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275 */
276uint8_t param_getdec(const char *line, int paramnum, uint8_t *destination)
277{
31abe49f 278 uint8_t val = param_get8ex(line, paramnum, 255, 10);
31abe49f 279 if( (int8_t) val == -1) return 1;
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280 (*destination) = val;
281 return 0;
282}
283/**
284 * @brief Checks if param is decimal
285 * @param line
286 * @param paramnum
287 * @return
288 */
289uint8_t param_isdec(const char *line, int paramnum)
290{
291 int bg, en;
292 //TODO, check more thorougly
293 if (!param_getptr(line, &bg, &en, paramnum)) return 1;
294 // return strtoul(&line[bg], NULL, 10) & 0xff;
295
296 return 0;
297}
298
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299uint8_t param_get8ex(const char *line, int paramnum, int deflt, int base)
300{
301 int bg, en;
302
303 if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1 304 return strtoul(&line[bg], NULL, base) & 0xff;
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305 else
306 return deflt;
307}
308
309uint32_t param_get32ex(const char *line, int paramnum, int deflt, int base)
310{
311 int bg, en;
312
313 if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1 314 return strtoul(&line[bg], NULL, base);
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315 else
316 return deflt;
317}
318
319uint64_t param_get64ex(const char *line, int paramnum, int deflt, int base)
320{
321 int bg, en;
322
323 if (!param_getptr(line, &bg, &en, paramnum))
6c6d1ac1 324 return strtoull(&line[bg], NULL, base);
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325 else
326 return deflt;
327
328 return 0;
329}
330
331int param_gethex(const char *line, int paramnum, uint8_t * data, int hexcnt)
332{
333 int bg, en, temp, i;
334
508b37ba 335 if (hexcnt & 1) return 1;
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336
337 if (param_getptr(line, &bg, &en, paramnum)) return 1;
338
508b37ba 339 if (en - bg + 1 != hexcnt) return 1;
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340
341 for(i = 0; i < hexcnt; i += 2) {
342 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
343
344 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
345 data[i / 2] = temp & 0xff;
346 }
347
348 return 0;
349}
e98572a1 350int param_gethex_ex(const char *line, int paramnum, uint8_t * data, int *hexcnt)
351{
352 int bg, en, temp, i;
353
354 //if (hexcnt % 2)
355 // return 1;
356
357 if (param_getptr(line, &bg, &en, paramnum)) return 1;
358
359 *hexcnt = en - bg + 1;
360 if (*hexcnt % 2) //error if not complete hex bytes
361 return 1;
aea4d766 362
e98572a1 363 for(i = 0; i < *hexcnt; i += 2) {
3bc7b13d 364 if (!(isxdigit(line[bg + i]) && isxdigit(line[bg + i + 1])) ) return 1;
e98572a1 365
366 sscanf((char[]){line[bg + i], line[bg + i + 1], 0}, "%X", &temp);
367 data[i / 2] = temp & 0xff;
368 }
369
370 return 0;
371}
aea4d766 372int param_getstr(const char *line, int paramnum, char * str)
373{
374 int bg, en;
375
376 if (param_getptr(line, &bg, &en, paramnum)) return 0;
377
378 memcpy(str, line + bg, en - bg + 1);
379 str[en - bg + 1] = 0;
380
381 return en - bg + 1;
382}
79544b28 383
384/*
385The following methods comes from Rfidler sourcecode.
386https://github.com/ApertureLabsLtd/RFIDler/blob/master/firmware/Pic32/RFIDler.X/src/
387*/
388
389// convert hex to sequence of 0/1 bit values
390// returns number of bits converted
391int hextobinarray(char *target, char *source)
392{
393 int length, i, count= 0;
394 char x;
395
396 length = strlen(source);
397 // process 4 bits (1 hex digit) at a time
398 while(length--)
399 {
400 x= *(source++);
401 // capitalize
402 if (x >= 'a' && x <= 'f')
403 x -= 32;
404 // convert to numeric value
405 if (x >= '0' && x <= '9')
406 x -= '0';
407 else if (x >= 'A' && x <= 'F')
408 x -= 'A' - 10;
409 else
410 return 0;
411 // output
412 for(i= 0 ; i < 4 ; ++i, ++count)
413 *(target++)= (x >> (3 - i)) & 1;
414 }
415
416 return count;
417}
418
419// convert hex to human readable binary string
420int hextobinstring(char *target, char *source)
421{
422 int length;
423
424 if(!(length= hextobinarray(target, source)))
425 return 0;
426 binarraytobinstring(target, target, length);
427 return length;
428}
429
430// convert binary array of 0x00/0x01 values to hex (safe to do in place as target will always be shorter than source)
431// return number of bits converted
432int binarraytohex(char *target, char *source, int length)
433{
434 unsigned char i, x;
435 int j = length;
436
437 if(j % 4)
438 return 0;
439
440 while(j)
441 {
442 for(i= x= 0 ; i < 4 ; ++i)
443 x += ( source[i] << (3 - i));
444 sprintf(target,"%X", x);
445 ++target;
446 source += 4;
447 j -= 4;
448 }
449 return length;
450}
451
452// convert binary array to human readable binary
453void binarraytobinstring(char *target, char *source, int length)
454{
455 int i;
456
457 for(i= 0 ; i < length ; ++i)
458 *(target++)= *(source++) + '0';
459 *target= '\0';
460}
461
462// return parity bit required to match type
a126332a 463uint8_t GetParity( uint8_t *bits, uint8_t type, int length)
79544b28 464{
465 int x;
ab7bb494 466 for( x = 0 ; length > 0 ; --length)
79544b28 467 x += bits[length - 1];
468 x %= 2;
79544b28 469 return x ^ type;
470}
471
472// add HID parity to binary array: EVEN prefix for 1st half of ID, ODD suffix for 2nd half
a126332a 473void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length)
79544b28 474{
475 *(target++)= GetParity(source, EVEN, length / 2);
476 memcpy(target, source, length);
477 target += length;
478 *(target)= GetParity(source + length / 2, ODD, length / 2);
479}
c3c241f3 480
481void xor(unsigned char * dst, unsigned char * src, size_t len) {
482 for( ; len > 0; len--,dst++,src++)
483 *dst ^= *src;
484}
485
486int32_t le24toh (uint8_t data[3]) {
487 return (data[2] << 16) | (data[1] << 8) | data[0];
488}
ad6219fc 489
ad6219fc 490uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits) {
9984b173 491
492 if (len > 32) return 0;
ad6219fc 493
494 int i = start;
495 int j = len-1;
ad6219fc 496 uint32_t tmp = 0;
9984b173 497
ad6219fc 498 for (; j >= 0; --j, ++i)
499 tmp |= bits[i] << j;
500
501 return tmp;
502}
9984b173 503
ab7bb494 504// RotateLeft - Ultralight, Desfire, works on byte level
505// 00-01-02 >> 01-02-00
9984b173 506void rol(uint8_t *data, const size_t len){
507 uint8_t first = data[0];
508 for (size_t i = 0; i < len-1; i++) {
509 data[i] = data[i+1];
510 }
511 data[len-1] = first;
512}
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