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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 // Data and Graph commands
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <limits.h>
15 #include "proxmark3.h"
16 #include "data.h"
17 #include "ui.h"
18 #include "graph.h"
19 #include "cmdparser.h"
20 #include "util.h"
21 #include "cmdmain.h"
22 #include "cmddata.h"
23 #include "lfdemod.h"
24 #include "usb_cmd.h"
25 #include "crc.h"
26 #include "crc16.h"
27 #include "loclass/cipherutils.h"
28
29 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
30 uint8_t g_debugMode=0;
31 size_t DemodBufferLen=0;
32 static int CmdHelp(const char *Cmd);
33
34 //set the demod buffer with given array of binary (one bit per byte)
35 //by marshmellow
36 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
37 {
38 if (buff == NULL)
39 return;
40
41 if ( size >= MAX_DEMOD_BUF_LEN)
42 size = MAX_DEMOD_BUF_LEN;
43
44 size_t i = 0;
45 for (; i < size; i++){
46 DemodBuffer[i]=buff[startIdx++];
47 }
48 DemodBufferLen=size;
49 return;
50 }
51
52 int CmdSetDebugMode(const char *Cmd)
53 {
54 int demod=0;
55 sscanf(Cmd, "%i", &demod);
56 g_debugMode=(uint8_t)demod;
57 return 1;
58 }
59
60 int usage_data_printdemodbuf(){
61 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
62 PrintAndLog("Options:");
63 PrintAndLog(" h This help");
64 PrintAndLog(" x output in hex (omit for binary output)");
65 PrintAndLog(" o <offset> enter offset in # of bits");
66 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
67 return 0;
68 }
69
70 //by marshmellow
71 void printDemodBuff(void)
72 {
73 int bitLen = DemodBufferLen;
74 if (bitLen<1) {
75 PrintAndLog("no bits found in demod buffer");
76 return;
77 }
78 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
79
80 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
81 PrintAndLog("%s",bin);
82
83 return;
84 }
85
86 int CmdPrintDemodBuff(const char *Cmd)
87 {
88 char hex[512]={0x00};
89 bool hexMode = false;
90 bool errors = false;
91 uint32_t offset = 0; //could be size_t but no param_get16...
92 uint32_t length = 512;
93 char cmdp = 0;
94 while(param_getchar(Cmd, cmdp) != 0x00)
95 {
96 switch(param_getchar(Cmd, cmdp))
97 {
98 case 'h':
99 case 'H':
100 return usage_data_printdemodbuf();
101 case 'x':
102 case 'X':
103 hexMode = true;
104 cmdp++;
105 break;
106 case 'o':
107 case 'O':
108 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
109 if (!offset) errors = true;
110 cmdp += 2;
111 break;
112 case 'l':
113 case 'L':
114 length = param_get32ex(Cmd, cmdp+1, 512, 10);
115 if (!length) errors = true;
116 cmdp += 2;
117 break;
118 default:
119 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
120 errors = true;
121 break;
122 }
123 if(errors) break;
124 }
125 //Validations
126 if(errors) return usage_data_printdemodbuf();
127 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
128 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
129
130 if (hexMode){
131 char *buf = (char *) (DemodBuffer + offset);
132 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
133 numBits = binarraytohex(hex, buf, numBits);
134 if (numBits==0) return 0;
135 PrintAndLog("DemodBuffer: %s",hex);
136 } else {
137 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
138 }
139 return 1;
140 }
141
142 //by marshmellow
143 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
144 int CmdGetBitStream(const char *Cmd)
145 {
146 int i;
147 CmdHpf(Cmd);
148 for (i = 0; i < GraphTraceLen; i++) {
149 if (GraphBuffer[i] >= 1) {
150 GraphBuffer[i] = 1;
151 } else {
152 GraphBuffer[i] = 0;
153 }
154 }
155 RepaintGraphWindow();
156 return 0;
157 }
158
159 //by marshmellow
160 //print 64 bit EM410x ID in multiple formats
161 void printEM410x(uint32_t hi, uint64_t id)
162 {
163 if (id || hi){
164 uint64_t iii=1;
165 uint64_t id2lo=0;
166 uint32_t ii=0;
167 uint32_t i=0;
168 for (ii=5; ii>0;ii--){
169 for (i=0;i<8;i++){
170 id2lo=(id2lo<<1LL) | ((id & (iii << (i+((ii-1)*8)))) >> (i+((ii-1)*8)));
171 }
172 }
173 if (hi){
174 //output 88 bit em id
175 PrintAndLog("\nEM TAG ID : %06X%016llX", hi, id);
176 } else{
177 //output 40 bit em id
178 PrintAndLog("\nEM TAG ID : %010llX", id);
179 PrintAndLog("Unique TAG ID : %010llX", id2lo);
180 PrintAndLog("\nPossible de-scramble patterns");
181 PrintAndLog("HoneyWell IdentKey {");
182 PrintAndLog("DEZ 8 : %08lld",id & 0xFFFFFF);
183 PrintAndLog("DEZ 10 : %010lld",id & 0xFFFFFFFF);
184 PrintAndLog("DEZ 5.5 : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
185 PrintAndLog("DEZ 3.5A : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
186 PrintAndLog("DEZ 3.5B : %03lld.%05lld",(id & 0xFF000000) >> 24,(id & 0xFFFF));
187 PrintAndLog("DEZ 3.5C : %03lld.%05lld",(id & 0xFF0000) >> 16,(id & 0xFFFF));
188 PrintAndLog("DEZ 14/IK2 : %014lld",id);
189 PrintAndLog("DEZ 15/IK3 : %015lld",id2lo);
190 PrintAndLog("DEZ 20/ZK : %02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld",
191 (id2lo & 0xf000000000) >> 36,
192 (id2lo & 0x0f00000000) >> 32,
193 (id2lo & 0x00f0000000) >> 28,
194 (id2lo & 0x000f000000) >> 24,
195 (id2lo & 0x0000f00000) >> 20,
196 (id2lo & 0x00000f0000) >> 16,
197 (id2lo & 0x000000f000) >> 12,
198 (id2lo & 0x0000000f00) >> 8,
199 (id2lo & 0x00000000f0) >> 4,
200 (id2lo & 0x000000000f)
201 );
202 uint64_t paxton = (((id>>32) << 24) | (id & 0xffffff)) + 0x143e00;
203 PrintAndLog("}\nOther : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
204 PrintAndLog("Pattern Paxton : %lld [0x%llX]", paxton, paxton);
205
206 uint32_t p1id = (id & 0xFFFFFF);
207 uint8_t arr[32] = {0x00};
208 int i =0;
209 int j = 23;
210 for (; i < 24; ++i, --j ){
211 arr[i] = (p1id >> i) & 1;
212 }
213
214 uint32_t p1 = 0;
215
216 p1 |= arr[23] << 21;
217 p1 |= arr[22] << 23;
218 p1 |= arr[21] << 20;
219 p1 |= arr[20] << 22;
220
221 p1 |= arr[19] << 18;
222 p1 |= arr[18] << 16;
223 p1 |= arr[17] << 19;
224 p1 |= arr[16] << 17;
225
226 p1 |= arr[15] << 13;
227 p1 |= arr[14] << 15;
228 p1 |= arr[13] << 12;
229 p1 |= arr[12] << 14;
230
231 p1 |= arr[11] << 6;
232 p1 |= arr[10] << 2;
233 p1 |= arr[9] << 7;
234 p1 |= arr[8] << 1;
235
236 p1 |= arr[7] << 0;
237 p1 |= arr[6] << 8;
238 p1 |= arr[5] << 11;
239 p1 |= arr[4] << 3;
240
241 p1 |= arr[3] << 10;
242 p1 |= arr[2] << 4;
243 p1 |= arr[1] << 5;
244 p1 |= arr[0] << 9;
245 PrintAndLog("Pattern 1 : %d [0x%X]", p1, p1);
246
247 uint16_t sebury1 = id & 0xFFFF;
248 uint8_t sebury2 = (id >> 16) & 0x7F;
249 uint32_t sebury3 = id & 0x7FFFFF;
250 PrintAndLog("Pattern Sebury : %d %d %d [0x%X 0x%X 0x%X]", sebury1, sebury2, sebury3, sebury1, sebury2, sebury3);
251 }
252 }
253 return;
254 }
255
256 int AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )
257 {
258 size_t idx = 0;
259 size_t BitLen = DemodBufferLen;
260 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
261 memcpy(BitStream, DemodBuffer, BitLen);
262 if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)){
263 //set GraphBuffer for clone or sim command
264 setDemodBuf(BitStream, BitLen, idx);
265 if (g_debugMode){
266 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
267 printDemodBuff();
268 }
269 if (verbose){
270 PrintAndLog("EM410x pattern found: ");
271 printEM410x(*hi, *lo);
272 }
273 return 1;
274 }
275 return 0;
276 }
277
278 int AskEm410xDemod(const char *Cmd, uint32_t *hi, uint64_t *lo, bool verbose)
279 {
280 bool st = TRUE;
281 if (!ASKDemod_ext(Cmd, FALSE, FALSE, 1, &st)) return 0;
282 return AskEm410xDecode(verbose, hi, lo);
283 }
284
285 //by marshmellow
286 //takes 3 arguments - clock, invert and maxErr as integers
287 //attempts to demodulate ask while decoding manchester
288 //prints binary found and saves in graphbuffer for further commands
289 int CmdAskEM410xDemod(const char *Cmd)
290 {
291 char cmdp = param_getchar(Cmd, 0);
292 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
293 PrintAndLog("Usage: data askem410xdemod [clock] <0|1> [maxError]");
294 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
295 PrintAndLog(" <invert>, 1 for invert output");
296 PrintAndLog(" [set maximum allowed errors], default = 100.");
297 PrintAndLog("");
298 PrintAndLog(" sample: data askem410xdemod = demod an EM410x Tag ID from GraphBuffer");
299 PrintAndLog(" : data askem410xdemod 32 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32");
300 PrintAndLog(" : data askem410xdemod 32 1 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32 and inverting data");
301 PrintAndLog(" : data askem410xdemod 1 = demod an EM410x Tag ID from GraphBuffer while inverting data");
302 PrintAndLog(" : data askem410xdemod 64 1 0 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/64 and inverting data and allowing 0 demod errors");
303 return 0;
304 }
305 uint64_t lo = 0;
306 uint32_t hi = 0;
307 return AskEm410xDemod(Cmd, &hi, &lo, true);
308 }
309
310 //by marshmellow
311 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
312 // (amp may not be needed anymore)
313 //verbose will print results and demoding messages
314 //emSearch will auto search for EM410x format in bitstream
315 //askType switches decode: ask/raw = 0, ask/manchester = 1
316 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
317 int invert=0;
318 int clk=0;
319 int maxErr=100;
320 int maxLen=0;
321 uint8_t askAmp = 0;
322 char amp = param_getchar(Cmd, 0);
323 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
324 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
325 if (!maxLen) maxLen = BIGBUF_SIZE;
326 if (invert != 0 && invert != 1) {
327 PrintAndLog("Invalid argument: %s", Cmd);
328 return 0;
329 }
330 if (clk==1){
331 invert=1;
332 clk=0;
333 }
334 if (amp == 'a' || amp == 'A') askAmp=1;
335 size_t BitLen = getFromGraphBuf(BitStream);
336 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
337 if (BitLen<255) return 0;
338 if (maxLen<BitLen && maxLen != 0) BitLen = maxLen;
339 int foundclk = 0;
340 bool st = false;
341 if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk);
342 if (st) {
343 *stCheck = st;
344 clk = (clk == 0) ? foundclk : clk;
345 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator");
346 }
347 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askAmp, askType);
348 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
349 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
350 return 0;
351 }
352 if (errCnt>maxErr){
353 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
354 return 0;
355 }
356 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
357
358 //output
359 setDemodBuf(BitStream,BitLen,0);
360 if (verbose || g_debugMode){
361 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
362 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
363 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
364 // Now output the bitstream to the scrollback by line of 16 bits
365 printDemodBuff();
366
367 }
368 uint64_t lo = 0;
369 uint32_t hi = 0;
370 if (emSearch){
371 AskEm410xDecode(true, &hi, &lo);
372 }
373 return 1;
374 }
375 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
376 bool st = false;
377 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
378 }
379
380 //by marshmellow
381 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
382 //attempts to demodulate ask while decoding manchester
383 //prints binary found and saves in graphbuffer for further commands
384 int Cmdaskmandemod(const char *Cmd)
385 {
386 char cmdp = param_getchar(Cmd, 0);
387 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
388 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
389 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
390 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
391 PrintAndLog(" <invert>, 1 to invert output");
392 PrintAndLog(" [set maximum allowed errors], default = 100");
393 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
394 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
395 PrintAndLog("");
396 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
397 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
398 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
399 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
400 PrintAndLog(" : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
401 return 0;
402 }
403 bool st = TRUE;
404 if (Cmd[0]=='s')
405 return ASKDemod_ext(Cmd++, TRUE, TRUE, 1, &st);
406 else if (Cmd[1] == 's')
407 return ASKDemod_ext(Cmd+=2, TRUE, TRUE, 1, &st);
408 else
409 return ASKDemod(Cmd, TRUE, TRUE, 1);
410 }
411
412 //by marshmellow
413 //manchester decode
414 //stricktly take 10 and 01 and convert to 0 and 1
415 int Cmdmandecoderaw(const char *Cmd)
416 {
417 int i =0;
418 int errCnt=0;
419 size_t size=0;
420 int invert=0;
421 int maxErr = 20;
422 char cmdp = param_getchar(Cmd, 0);
423 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
424 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
425 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
426 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
427 PrintAndLog(" [invert] invert output");
428 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
429 PrintAndLog("");
430 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
431 return 0;
432 }
433 if (DemodBufferLen==0) return 0;
434 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
435 int high=0,low=0;
436 for (;i<DemodBufferLen;++i){
437 if (DemodBuffer[i]>high) high=DemodBuffer[i];
438 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
439 BitStream[i]=DemodBuffer[i];
440 }
441 if (high>7 || low <0 ){
442 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
443 return 0;
444 }
445
446 sscanf(Cmd, "%i %i", &invert, &maxErr);
447 size=i;
448 errCnt=manrawdecode(BitStream, &size, invert);
449 if (errCnt>=maxErr){
450 PrintAndLog("Too many errors: %d",errCnt);
451 return 0;
452 }
453 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
454 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
455 if (errCnt==0){
456 uint64_t id = 0;
457 uint32_t hi = 0;
458 size_t idx=0;
459 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
460 //need to adjust to set bitstream back to manchester encoded data
461 //setDemodBuf(BitStream, size, idx);
462
463 printEM410x(hi, id);
464 }
465 }
466 return 1;
467 }
468
469 //by marshmellow
470 //biphase decode
471 //take 01 or 10 = 0 and 11 or 00 = 1
472 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
473 // and "invert" default = 0 if 1 it will invert output
474 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
475 int CmdBiphaseDecodeRaw(const char *Cmd)
476 {
477 size_t size=0;
478 int offset=0, invert=0, maxErr=20, errCnt=0;
479 char cmdp = param_getchar(Cmd, 0);
480 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
481 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
482 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
483 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
484 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
485 PrintAndLog("");
486 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
487 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
488 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
489 PrintAndLog("");
490 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
491 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
492 return 0;
493 }
494 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
495 if (DemodBufferLen==0){
496 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
497 return 0;
498 }
499 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
500 memcpy(BitStream, DemodBuffer, DemodBufferLen);
501 size = DemodBufferLen;
502 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
503 if (errCnt<0){
504 PrintAndLog("Error during decode:%d", errCnt);
505 return 0;
506 }
507 if (errCnt>maxErr){
508 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
509 return 0;
510 }
511
512 if (errCnt>0){
513 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
514 }
515 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
516 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
517
518 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
519 return 1;
520 }
521
522 //by marshmellow
523 // - ASK Demod then Biphase decode GraphBuffer samples
524 int ASKbiphaseDemod(const char *Cmd, bool verbose)
525 {
526 //ask raw demod GraphBuffer first
527 int offset=0, clk=0, invert=0, maxErr=0;
528 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
529
530 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
531 size_t size = getFromGraphBuf(BitStream);
532 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
533 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
534 if ( errCnt < 0 || errCnt > maxErr ) {
535 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
536 return 0;
537 }
538
539 //attempt to Biphase decode BitStream
540 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
541 if (errCnt < 0){
542 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
543 return 0;
544 }
545 if (errCnt > maxErr) {
546 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
547 return 0;
548 }
549 //success set DemodBuffer and return
550 setDemodBuf(BitStream, size, 0);
551 if (g_debugMode || verbose){
552 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
553 printDemodBuff();
554 }
555 return 1;
556 }
557 //by marshmellow - see ASKbiphaseDemod
558 int Cmdaskbiphdemod(const char *Cmd)
559 {
560 char cmdp = param_getchar(Cmd, 0);
561 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
562 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
563 PrintAndLog(" [offset], offset to begin biphase, default=0");
564 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
565 PrintAndLog(" <invert>, 1 to invert output");
566 PrintAndLog(" [set maximum allowed errors], default = 100");
567 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
568 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
569 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
570 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
571 PrintAndLog(" NOTE: any other arg must have previous args set to work");
572 PrintAndLog("");
573 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
574 PrintAndLog("");
575 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
576 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
577 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
578 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
579 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
580 PrintAndLog(" : data rawdemod ab 0 64 1 0 = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
581 PrintAndLog(" : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
582 return 0;
583 }
584 return ASKbiphaseDemod(Cmd, TRUE);
585 }
586
587 //by marshmellow
588 //attempts to demodulate and identify a G_Prox_II verex/chubb card
589 //WARNING: if it fails during some points it will destroy the DemodBuffer data
590 // but will leave the GraphBuffer intact.
591 //if successful it will push askraw data back to demod buffer ready for emulation
592 int CmdG_Prox_II_Demod(const char *Cmd)
593 {
594 if (!ASKbiphaseDemod(Cmd, FALSE)){
595 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
596 return 0;
597 }
598 size_t size = DemodBufferLen;
599 //call lfdemod.c demod for gProxII
600 int ans = gProxII_Demod(DemodBuffer, &size);
601 if (ans < 0){
602 if (g_debugMode) PrintAndLog("Error gProxII_Demod");
603 return 0;
604 }
605 //got a good demod of 96 bits
606 uint8_t ByteStream[8] = {0x00};
607 uint8_t xorKey=0;
608 size_t startIdx = ans + 6; //start after 6 bit preamble
609
610 uint8_t bits_no_spacer[90];
611 //so as to not mess with raw DemodBuffer copy to a new sample array
612 memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
613 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
614 size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
615 if (bitLen != 72) {
616 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
617 return 0;
618 }
619 // get key and then get all 8 bytes of payload decoded
620 xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
621 for (size_t idx = 0; idx < 8; idx++) {
622 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
623 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
624 }
625 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
626 //
627 uint8_t fmtLen = ByteStream[0]>>2;
628 uint32_t FC = 0;
629 uint32_t Card = 0;
630 //get raw 96 bits to print
631 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
632 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
633 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
634
635 if (fmtLen==36){
636 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
637 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
638 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
639 } else if(fmtLen==26){
640 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
641 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
642 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
643 } else {
644 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
645 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
646 }
647 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
648 setDemodBuf(DemodBuffer+ans, 96, 0);
649 return 1;
650 }
651
652 //by marshmellow
653 //see ASKDemod for what args are accepted
654 int CmdVikingDemod(const char *Cmd)
655 {
656 if (!ASKDemod(Cmd, false, false, 1)) {
657 if (g_debugMode) PrintAndLog("ASKDemod failed");
658 return 0;
659 }
660 size_t size = DemodBufferLen;
661 //call lfdemod.c demod for Viking
662 int ans = VikingDemod_AM(DemodBuffer, &size);
663 if (ans < 0) {
664 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
665 return 0;
666 }
667 //got a good demod
668 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
669 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
670 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
671 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
672 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, checksum);
673 PrintAndLog("Raw: %08X%08X", raw1,raw2);
674 setDemodBuf(DemodBuffer+ans, 64, 0);
675 return 1;
676 }
677
678 //by marshmellow - see ASKDemod
679 int Cmdaskrawdemod(const char *Cmd)
680 {
681 char cmdp = param_getchar(Cmd, 0);
682 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
683 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
684 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
685 PrintAndLog(" <invert>, 1 to invert output");
686 PrintAndLog(" [set maximum allowed errors], default = 100");
687 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
688 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
689 PrintAndLog("");
690 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
691 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
692 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
693 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
694 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
695 PrintAndLog(" : data rawdemod ar 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
696 PrintAndLog(" : data rawdemod ar 64 1 0 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
697 return 0;
698 }
699 return ASKDemod(Cmd, TRUE, FALSE, 0);
700 }
701
702 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
703 {
704 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
705 size_t Correlation = 0;
706 int maxSum = 0;
707 int lastMax = 0;
708 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
709 for (int i = 0; i < GraphTraceLen - window; ++i) {
710 int sum = 0;
711 for (int j = 0; j < window; ++j) {
712 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
713 }
714 CorrelBuffer[i] = sum;
715 if (sum >= maxSum-100 && sum <= maxSum+100){
716 //another max
717 Correlation = i-lastMax;
718 lastMax = i;
719 if (sum > maxSum) maxSum = sum;
720 } else if (sum > maxSum){
721 maxSum=sum;
722 lastMax = i;
723 }
724 }
725 if (Correlation==0){
726 //try again with wider margin
727 for (int i = 0; i < GraphTraceLen - window; i++){
728 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
729 //another max
730 Correlation = i-lastMax;
731 lastMax = i;
732 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
733 }
734 }
735 }
736 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
737
738 if (SaveGrph){
739 GraphTraceLen = GraphTraceLen - window;
740 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
741 RepaintGraphWindow();
742 }
743 return Correlation;
744 }
745
746 int usage_data_autocorr(void)
747 {
748 //print help
749 PrintAndLog("Usage: data autocorr [window] [g]");
750 PrintAndLog("Options: ");
751 PrintAndLog(" h This help");
752 PrintAndLog(" [window] window length for correlation - default = 4000");
753 PrintAndLog(" g save back to GraphBuffer (overwrite)");
754 return 0;
755 }
756
757 int CmdAutoCorr(const char *Cmd)
758 {
759 char cmdp = param_getchar(Cmd, 0);
760 if (cmdp == 'h' || cmdp == 'H')
761 return usage_data_autocorr();
762 int window = 4000; //set default
763 char grph=0;
764 bool updateGrph = FALSE;
765 sscanf(Cmd, "%i %c", &window, &grph);
766
767 if (window >= GraphTraceLen) {
768 PrintAndLog("window must be smaller than trace (%d samples)",
769 GraphTraceLen);
770 return 0;
771 }
772 if (grph == 'g') updateGrph=TRUE;
773 return AutoCorrelate(window, updateGrph, TRUE);
774 }
775
776 int CmdBitsamples(const char *Cmd)
777 {
778 int cnt = 0;
779 uint8_t got[12288];
780
781 GetFromBigBuf(got,sizeof(got),0);
782 WaitForResponse(CMD_ACK,NULL);
783
784 for (int j = 0; j < sizeof(got); j++) {
785 for (int k = 0; k < 8; k++) {
786 if(got[j] & (1 << (7 - k))) {
787 GraphBuffer[cnt++] = 1;
788 } else {
789 GraphBuffer[cnt++] = 0;
790 }
791 }
792 }
793 GraphTraceLen = cnt;
794 RepaintGraphWindow();
795 return 0;
796 }
797
798 int CmdBuffClear(const char *Cmd)
799 {
800 UsbCommand c = {CMD_BUFF_CLEAR};
801 SendCommand(&c);
802 ClearGraph(true);
803 return 0;
804 }
805
806 int CmdDec(const char *Cmd)
807 {
808 for (int i = 0; i < (GraphTraceLen / 2); ++i)
809 GraphBuffer[i] = GraphBuffer[i * 2];
810 GraphTraceLen /= 2;
811 PrintAndLog("decimated by 2");
812 RepaintGraphWindow();
813 return 0;
814 }
815 /**
816 * Undecimate - I'd call it 'interpolate', but we'll save that
817 * name until someone does an actual interpolation command, not just
818 * blindly repeating samples
819 * @param Cmd
820 * @return
821 */
822 int CmdUndec(const char *Cmd)
823 {
824 if(param_getchar(Cmd, 0) == 'h')
825 {
826 PrintAndLog("Usage: data undec [factor]");
827 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
828 PrintAndLog("Options: ");
829 PrintAndLog(" h This help");
830 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
831 PrintAndLog("Example: 'data undec 3'");
832 return 0;
833 }
834
835 uint8_t factor = param_get8ex(Cmd, 0, 2, 10);
836 //We have memory, don't we?
837 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
838 uint32_t g_index = 0 ,s_index = 0;
839 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
840 {
841 int count = 0;
842 for (count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
843 swap[s_index+count] = GraphBuffer[g_index];
844 s_index += count;
845 g_index++;
846 }
847
848 memcpy(GraphBuffer, swap, s_index * sizeof(int));
849 GraphTraceLen = s_index;
850 RepaintGraphWindow();
851 return 0;
852 }
853
854 //by marshmellow
855 //shift graph zero up or down based on input + or -
856 int CmdGraphShiftZero(const char *Cmd)
857 {
858
859 int shift=0;
860 //set options from parameters entered with the command
861 sscanf(Cmd, "%i", &shift);
862 int shiftedVal=0;
863 for(int i = 0; i<GraphTraceLen; i++){
864 shiftedVal=GraphBuffer[i]+shift;
865 if (shiftedVal>127)
866 shiftedVal=127;
867 else if (shiftedVal<-127)
868 shiftedVal=-127;
869 GraphBuffer[i]= shiftedVal;
870 }
871 CmdNorm("");
872 return 0;
873 }
874
875 //by marshmellow
876 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
877 //similar to dirtheshold, threshold commands
878 //takes a threshold length which is the measured length between two samples then determines an edge
879 int CmdAskEdgeDetect(const char *Cmd)
880 {
881 int thresLen = 25;
882 sscanf(Cmd, "%i", &thresLen);
883
884 for(int i = 1; i<GraphTraceLen; i++){
885 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
886 GraphBuffer[i-1] = 127;
887 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
888 GraphBuffer[i-1] = -127;
889 }
890 RepaintGraphWindow();
891 return 0;
892 }
893
894 /* Print our clock rate */
895 // uses data from graphbuffer
896 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
897 int CmdDetectClockRate(const char *Cmd)
898 {
899 char cmdp = param_getchar(Cmd, 0);
900 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
901 PrintAndLog("Usage: data detectclock [modulation] <clock>");
902 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
903 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
904 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
905 PrintAndLog("");
906 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
907 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
908 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
909 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
910 }
911 int ans=0;
912 if (cmdp == 'a'){
913 ans = GetAskClock(Cmd+1, true, false);
914 } else if (cmdp == 'f'){
915 ans = GetFskClock("", true, false);
916 } else if (cmdp == 'n'){
917 ans = GetNrzClock("", true, false);
918 } else if (cmdp == 'p'){
919 ans = GetPskClock("", true, false);
920 } else {
921 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
922 }
923 return ans;
924 }
925
926 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
927 {
928 static char fType[8];
929 memset(fType, 0x00, 8);
930 char *fskType = fType;
931 if (fchigh==10 && fclow==8){
932 if (invert) //fsk2a
933 memcpy(fskType, "FSK2a", 5);
934 else //fsk2
935 memcpy(fskType, "FSK2", 4);
936 } else if (fchigh == 8 && fclow == 5) {
937 if (invert)
938 memcpy(fskType, "FSK1", 4);
939 else
940 memcpy(fskType, "FSK1a", 5);
941 } else {
942 memcpy(fskType, "FSK??", 5);
943 }
944 return fskType;
945 }
946
947 //by marshmellow
948 //fsk raw demod and print binary
949 //takes 4 arguments - Clock, invert, fchigh, fclow
950 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
951 int FSKrawDemod(const char *Cmd, bool verbose)
952 {
953 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
954 uint8_t rfLen, invert, fchigh, fclow;
955
956 //set defaults
957 //set options from parameters entered with the command
958 rfLen = param_get8(Cmd, 0);
959 invert = param_get8(Cmd, 1);
960 fchigh = param_get8(Cmd, 2);
961 fclow = param_get8(Cmd, 3);
962 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
963 if (rfLen==1) {
964 invert = 1; //if invert option only is used
965 rfLen = 0;
966 }
967 }
968
969 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
970 size_t BitLen = getFromGraphBuf(BitStream);
971 if (BitLen==0) return 0;
972 //get field clock lengths
973 uint16_t fcs=0;
974 if (!fchigh || !fclow) {
975 fcs = countFC(BitStream, BitLen, 1);
976 if (!fcs) {
977 fchigh = 10;
978 fclow = 8;
979 } else {
980 fchigh = (fcs >> 8) & 0x00FF;
981 fclow = fcs & 0x00FF;
982 }
983 }
984 //get bit clock length
985 if (!rfLen) {
986 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
987 if (!rfLen) rfLen = 50;
988 }
989 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
990 if (size > 0) {
991 setDemodBuf(BitStream, size, 0);
992
993 // Now output the bitstream to the scrollback by line of 16 bits
994 if (verbose || g_debugMode) {
995 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
996 PrintAndLog("%s decoded bitstream:", GetFSKType(fchigh, fclow, invert));
997 printDemodBuff();
998 }
999
1000 return 1;
1001 } else {
1002 if (g_debugMode) PrintAndLog("no FSK data found");
1003 }
1004 return 0;
1005 }
1006
1007 //by marshmellow
1008 //fsk raw demod and print binary
1009 //takes 4 arguments - Clock, invert, fchigh, fclow
1010 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
1011 int CmdFSKrawdemod(const char *Cmd)
1012 {
1013 char cmdp = param_getchar(Cmd, 0);
1014 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1015 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
1016 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
1017 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
1018 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
1019 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
1020 PrintAndLog("");
1021 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
1022 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
1023 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
1024 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
1025 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
1026 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
1027 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
1028 return 0;
1029 }
1030 return FSKrawDemod(Cmd, TRUE);
1031 }
1032
1033 //by marshmellow (based on existing demod + holiman's refactor)
1034 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
1035 //print full HID Prox ID and some bit format details if found
1036 int CmdFSKdemodHID(const char *Cmd)
1037 {
1038 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1039 uint32_t hi2=0, hi=0, lo=0;
1040
1041 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1042 size_t BitLen = getFromGraphBuf(BitStream);
1043 if (BitLen==0) return 0;
1044 //get binary from fsk wave
1045 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1046 if (idx<0){
1047 if (g_debugMode){
1048 if (idx==-1){
1049 PrintAndLog("DEBUG: Just Noise Detected");
1050 } else if (idx == -2) {
1051 PrintAndLog("DEBUG: Error demoding fsk");
1052 } else if (idx == -3) {
1053 PrintAndLog("DEBUG: Preamble not found");
1054 } else if (idx == -4) {
1055 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
1056 } else {
1057 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1058 }
1059 }
1060 return 0;
1061 }
1062 if (hi2==0 && hi==0 && lo==0) {
1063 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
1064 return 0;
1065 }
1066 if (hi2 != 0){ //extra large HID tags
1067 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
1068 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
1069 }
1070 else { //standard HID tags <38 bits
1071 uint8_t fmtLen = 0;
1072 uint32_t fc = 0;
1073 uint32_t cardnum = 0;
1074 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
1075 uint32_t lo2=0;
1076 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
1077 uint8_t idx3 = 1;
1078 while(lo2>1){ //find last bit set to 1 (format len bit)
1079 lo2=lo2>>1;
1080 idx3++;
1081 }
1082 fmtLen =idx3+19;
1083 fc =0;
1084 cardnum=0;
1085 if(fmtLen==26){
1086 cardnum = (lo>>1)&0xFFFF;
1087 fc = (lo>>17)&0xFF;
1088 }
1089 if(fmtLen==34){
1090 cardnum = (lo>>1)&0xFFFF;
1091 fc= ((hi&1)<<15)|(lo>>17);
1092 }
1093 if(fmtLen==35){
1094 cardnum = (lo>>1)&0xFFFFF;
1095 fc = ((hi&1)<<11)|(lo>>21);
1096 }
1097 }
1098 else { //if bit 38 is not set then 37 bit format is used
1099 fmtLen = 37;
1100 fc = 0;
1101 cardnum = 0;
1102 if(fmtLen == 37){
1103 cardnum = (lo>>1)&0x7FFFF;
1104 fc = ((hi&0xF)<<12)|(lo>>20);
1105 }
1106 }
1107 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
1108 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
1109 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
1110 }
1111 setDemodBuf(BitStream,BitLen,idx);
1112 if (g_debugMode){
1113 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
1114 printDemodBuff();
1115 }
1116 return 1;
1117 }
1118
1119 //by marshmellow
1120 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
1121 //print full Paradox Prox ID and some bit format details if found
1122 int CmdFSKdemodParadox(const char *Cmd)
1123 {
1124 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1125 uint32_t hi2=0, hi=0, lo=0;
1126
1127 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1128 size_t BitLen = getFromGraphBuf(BitStream);
1129 if (BitLen==0) return 0;
1130 //get binary from fsk wave
1131 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1132 if (idx<0){
1133 if (g_debugMode){
1134 if (idx==-1){
1135 PrintAndLog("DEBUG: Just Noise Detected");
1136 } else if (idx == -2) {
1137 PrintAndLog("DEBUG: Error demoding fsk");
1138 } else if (idx == -3) {
1139 PrintAndLog("DEBUG: Preamble not found");
1140 } else if (idx == -4) {
1141 PrintAndLog("DEBUG: Error in Manchester data");
1142 } else {
1143 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1144 }
1145 }
1146 return 0;
1147 }
1148 if (hi2==0 && hi==0 && lo==0){
1149 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1150 return 0;
1151 }
1152 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1153 uint32_t cardnum = (lo>>10)&0xFFFF;
1154 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1155 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1156 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1157
1158 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1159 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
1160 setDemodBuf(BitStream,BitLen,idx);
1161 if (g_debugMode){
1162 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1163 printDemodBuff();
1164 }
1165 return 1;
1166 }
1167
1168 //by marshmellow
1169 //IO-Prox demod - FSK RF/64 with preamble of 000000001
1170 //print ioprox ID and some format details
1171 int CmdFSKdemodIO(const char *Cmd)
1172 {
1173 int idx=0;
1174 //something in graphbuffer?
1175 if (GraphTraceLen < 65) {
1176 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1177 return 0;
1178 }
1179 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1180 size_t BitLen = getFromGraphBuf(BitStream);
1181 if (BitLen==0) return 0;
1182
1183 //get binary from fsk wave
1184 idx = IOdemodFSK(BitStream,BitLen);
1185 if (idx<0){
1186 if (g_debugMode){
1187 if (idx==-1){
1188 PrintAndLog("DEBUG: Just Noise Detected");
1189 } else if (idx == -2) {
1190 PrintAndLog("DEBUG: not enough samples");
1191 } else if (idx == -3) {
1192 PrintAndLog("DEBUG: error during fskdemod");
1193 } else if (idx == -4) {
1194 PrintAndLog("DEBUG: Preamble not found");
1195 } else if (idx == -5) {
1196 PrintAndLog("DEBUG: Separator bits not found");
1197 } else {
1198 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1199 }
1200 }
1201 return 0;
1202 }
1203 if (idx==0){
1204 if (g_debugMode){
1205 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1206 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
1207 }
1208 return 0;
1209 }
1210 //Index map
1211 //0 10 20 30 40 50 60
1212 //| | | | | | |
1213 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1214 //-----------------------------------------------------------------------------
1215 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1216 //
1217 //XSF(version)facility:codeone+codetwo (raw)
1218 //Handle the data
1219 if (idx+64>BitLen) {
1220 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1221 return 0;
1222 }
1223 PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx], BitStream[idx+1], BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
1224 PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9], BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
1225 PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
1226 PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
1227 PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
1228 PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
1229 PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
1230
1231 uint32_t code = bytebits_to_byte(BitStream+idx,32);
1232 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
1233 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1234 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
1235 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
1236 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
1237 uint16_t calccrc = 0;
1238
1239 for (uint8_t i=1; i<6; ++i){
1240 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
1241 }
1242 calccrc &= 0xff;
1243 calccrc = 0xff - calccrc;
1244
1245 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
1246
1247 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
1248 setDemodBuf(BitStream,64,idx);
1249 if (g_debugMode){
1250 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1251 printDemodBuff();
1252 }
1253 return 1;
1254 }
1255
1256 //by marshmellow
1257 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1258 //print full AWID Prox ID and some bit format details if found
1259 int CmdFSKdemodAWID(const char *Cmd)
1260 {
1261 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1262 size_t size = getFromGraphBuf(BitStream);
1263 if (size==0) return 0;
1264
1265 //get binary from fsk wave
1266 int idx = AWIDdemodFSK(BitStream, &size);
1267 if (idx<=0){
1268 if (g_debugMode==1){
1269 if (idx == -1)
1270 PrintAndLog("DEBUG: Error - not enough samples");
1271 else if (idx == -2)
1272 PrintAndLog("DEBUG: Error - only noise found");
1273 else if (idx == -3)
1274 PrintAndLog("DEBUG: Error - problem during FSK demod");
1275 else if (idx == -4)
1276 PrintAndLog("DEBUG: Error - AWID preamble not found");
1277 else if (idx == -5)
1278 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1279 else
1280 PrintAndLog("DEBUG: Error %d",idx);
1281 }
1282 return 0;
1283 }
1284
1285 // Index map
1286 // 0 10 20 30 40 50 60
1287 // | | | | | | |
1288 // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
1289 // -----------------------------------------------------------------------------
1290 // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
1291 // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
1292 // |---26 bit---| |-----117----||-------------142-------------|
1293 // b = format bit len, o = odd parity of last 3 bits
1294 // f = facility code, c = card number
1295 // w = wiegand parity
1296 // (26 bit format shown)
1297
1298 //get raw ID before removing parities
1299 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1300 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1301 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1302 setDemodBuf(BitStream,96,idx);
1303
1304 size = removeParity(BitStream, idx+8, 4, 1, 88);
1305 if (size != 66){
1306 if (g_debugMode==1) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1307 return 0;
1308 }
1309 // ok valid card found!
1310
1311 // Index map
1312 // 0 10 20 30 40 50 60
1313 // | | | | | | |
1314 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1315 // -----------------------------------------------------------------------------
1316 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1317 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1318 // |26 bit| |-117--| |-----142------|
1319 // b = format bit len, o = odd parity of last 3 bits
1320 // f = facility code, c = card number
1321 // w = wiegand parity
1322 // (26 bit format shown)
1323
1324 uint32_t fc = 0;
1325 uint32_t cardnum = 0;
1326 uint32_t code1 = 0;
1327 uint32_t code2 = 0;
1328 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
1329 if (fmtLen==26){
1330 fc = bytebits_to_byte(BitStream+9, 8);
1331 cardnum = bytebits_to_byte(BitStream+17, 16);
1332 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1333 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1334 } else {
1335 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1336 if (fmtLen>32){
1337 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1338 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
1339 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1340 } else{
1341 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1342 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1343 }
1344 }
1345 if (g_debugMode){
1346 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1347 printDemodBuff();
1348 }
1349 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
1350 return 1;
1351 }
1352
1353 //by marshmellow
1354 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1355 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1356 int CmdFSKdemodPyramid(const char *Cmd)
1357 {
1358 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1359 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1360 size_t size = getFromGraphBuf(BitStream);
1361 if (size==0) return 0;
1362
1363 //get binary from fsk wave
1364 int idx = PyramiddemodFSK(BitStream, &size);
1365 if (idx < 0){
1366 if (g_debugMode==1){
1367 if (idx == -5)
1368 PrintAndLog("DEBUG: Error - not enough samples");
1369 else if (idx == -1)
1370 PrintAndLog("DEBUG: Error - only noise found");
1371 else if (idx == -2)
1372 PrintAndLog("DEBUG: Error - problem during FSK demod");
1373 else if (idx == -3)
1374 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1375 else if (idx == -4)
1376 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1377 else
1378 PrintAndLog("DEBUG: Error - idx: %d",idx);
1379 }
1380 return 0;
1381 }
1382 // Index map
1383 // 0 10 20 30 40 50 60
1384 // | | | | | | |
1385 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1386 // -----------------------------------------------------------------------------
1387 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1388 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1389
1390 // 64 70 80 90 100 110 120
1391 // | | | | | | |
1392 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1393 // -----------------------------------------------------------------------------
1394 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1395 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1396 // |---115---||---------71---------|
1397 // s = format start bit, o = odd parity of last 7 bits
1398 // f = facility code, c = card number
1399 // w = wiegand parity, x = extra space for other formats
1400 // p = CRC8maxim checksum
1401 // (26 bit format shown)
1402
1403 //get bytes for checksum calc
1404 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
1405 uint8_t csBuff[14] = {0x00};
1406 for (uint8_t i = 0; i < 13; i++){
1407 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
1408 }
1409 //check checksum calc
1410 //checksum calc thanks to ICEMAN!!
1411 uint32_t checkCS = CRC8Maxim(csBuff,13);
1412
1413 //get raw ID before removing parities
1414 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1415 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1416 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1417 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
1418 setDemodBuf(BitStream,128,idx);
1419
1420 size = removeParity(BitStream, idx+8, 8, 1, 120);
1421 if (size != 105){
1422 if (g_debugMode==1)
1423 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1424 return 0;
1425 }
1426
1427 // ok valid card found!
1428
1429 // Index map
1430 // 0 10 20 30 40 50 60 70
1431 // | | | | | | | |
1432 // 01234567890123456789012345678901234567890123456789012345678901234567890
1433 // -----------------------------------------------------------------------
1434 // 00000000000000000000000000000000000000000000000000000000000000000000000
1435 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1436
1437 // 71 80 90 100
1438 // | | | |
1439 // 1 2 34567890 1234567890123456 7 8901234
1440 // ---------------------------------------
1441 // 1 1 01110011 0000000001000110 0 1001010
1442 // s w ffffffff cccccccccccccccc w ppppppp
1443 // |--115-| |------71------|
1444 // s = format start bit, o = odd parity of last 7 bits
1445 // f = facility code, c = card number
1446 // w = wiegand parity, x = extra space for other formats
1447 // p = CRC8-Maxim checksum
1448 // (26 bit format shown)
1449
1450 //find start bit to get fmtLen
1451 int j;
1452 for (j=0; j < size; ++j){
1453 if(BitStream[j]) break;
1454 }
1455
1456 uint8_t fmtLen = size-j-8;
1457 uint32_t fc = 0;
1458 uint32_t cardnum = 0;
1459 uint32_t code1 = 0;
1460
1461 if ( fmtLen == 26 ){
1462 fc = bytebits_to_byte(BitStream+73, 8);
1463 cardnum = bytebits_to_byte(BitStream+81, 16);
1464 code1 = bytebits_to_byte(BitStream+72,fmtLen);
1465 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi3, rawHi2, rawHi, rawLo);
1466 } else if (fmtLen == 45) {
1467 fmtLen = 42; //end = 10 bits not 7 like 26 bit fmt
1468 fc = bytebits_to_byte(BitStream+53, 10);
1469 cardnum = bytebits_to_byte(BitStream+63, 32);
1470 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1471 } else {
1472 cardnum = bytebits_to_byte(BitStream+81, 16);
1473 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1474 }
1475 if (checksum == checkCS)
1476 PrintAndLog("Checksum %02x passed", checksum);
1477 else
1478 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
1479
1480 if (g_debugMode){
1481 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1482 printDemodBuff();
1483 }
1484 return 1;
1485 }
1486
1487 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
1488 // 8 databits + 1 parity (1)
1489 // CIITT 16 chksum
1490 // NATIONAL CODE, ICAR database
1491 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
1492 // FLAG (animal/non-animal)
1493 /*
1494 38 IDbits
1495 10 country code
1496 1 extra app bit
1497 14 reserved bits
1498 1 animal bit
1499 16 ccitt CRC chksum over 64bit ID CODE.
1500 24 appli bits.
1501
1502 -- sample: 985121004515220 [ 37FF65B88EF94 ]
1503 */
1504 int CmdFDXBdemodBI(const char *Cmd){
1505
1506 int invert = 1;
1507 int clk = 32;
1508 int errCnt = 0;
1509 int maxErr = 0;
1510 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
1511 size_t size = getFromGraphBuf(BitStream);
1512
1513 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
1514 if ( errCnt < 0 || errCnt > maxErr ) {
1515 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
1516 return 0;
1517 }
1518
1519 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
1520 if (errCnt < 0 || errCnt > maxErr ) {
1521 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
1522 return 0;
1523 }
1524
1525 int preambleIndex = FDXBdemodBI(BitStream, &size);
1526 if (preambleIndex < 0){
1527 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
1528 return 0;
1529 }
1530 if (size != 128) {
1531 if (g_debugMode) PrintAndLog("Error incorrect data length found");
1532 return 0;
1533 }
1534
1535 setDemodBuf(BitStream, 128, preambleIndex);
1536
1537 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
1538 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
1539 if ( size != 104 ) {
1540 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1541 return 0;
1542 }
1543 if (g_debugMode) {
1544 char *bin = sprint_bin_break(BitStream,size,16);
1545 PrintAndLog("DEBUG BinStream:\n%s",bin);
1546 }
1547 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1548 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1549
1550 //got a good demod
1551 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1552 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1553 uint8_t dataBlockBit = BitStream[48];
1554 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1555 uint8_t animalBit = BitStream[63];
1556 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1557 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1558
1559 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1560 uint8_t raw[8];
1561 num_to_bytes(rawid, 8, raw);
1562
1563 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1564
1565 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1566 PrintAndLog("Animal ID: %04u-%012llu", countryCode, NationalCode);
1567 PrintAndLog("National Code: %012llu", NationalCode);
1568 PrintAndLog("CountryCode: %04u", countryCode);
1569 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1570 PrintAndLog("reserved Code: %u", reservedCode);
1571 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1572 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1573 PrintAndLog("Extended: 0x%X\n", extended);
1574
1575 return 1;
1576 }
1577
1578
1579 //by marshmellow
1580 //attempt to psk1 demod graph buffer
1581 int PSKDemod(const char *Cmd, bool verbose)
1582 {
1583 int invert=0;
1584 int clk=0;
1585 int maxErr=100;
1586 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1587 if (clk==1){
1588 invert=1;
1589 clk=0;
1590 }
1591 if (invert != 0 && invert != 1) {
1592 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1593 return 0;
1594 }
1595 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1596 size_t BitLen = getFromGraphBuf(BitStream);
1597 if (BitLen==0) return 0;
1598 uint8_t carrier=countFC(BitStream, BitLen, 0);
1599 if (carrier!=2 && carrier!=4 && carrier!=8){
1600 //invalid carrier
1601 return 0;
1602 }
1603 if (g_debugMode){
1604 PrintAndLog("Carrier: rf/%d",carrier);
1605 }
1606 int errCnt=0;
1607 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1608 if (errCnt > maxErr){
1609 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1610 return 0;
1611 }
1612 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1613 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1614 return 0;
1615 }
1616 if (verbose || g_debugMode){
1617 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1618 if (errCnt>0){
1619 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1620 }
1621 }
1622 //prime demod buffer for output
1623 setDemodBuf(BitStream,BitLen,0);
1624 return 1;
1625 }
1626
1627 // Indala 26 bit decode
1628 // by marshmellow
1629 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1630 int CmdIndalaDecode(const char *Cmd)
1631 {
1632 int ans;
1633 if (strlen(Cmd)>0){
1634 ans = PSKDemod(Cmd, 0);
1635 } else{ //default to RF/32
1636 ans = PSKDemod("32", 0);
1637 }
1638
1639 if (!ans){
1640 if (g_debugMode==1)
1641 PrintAndLog("Error1: %d",ans);
1642 return 0;
1643 }
1644 uint8_t invert=0;
1645 size_t size = DemodBufferLen;
1646 size_t startIdx = indala26decode(DemodBuffer, &size, &invert);
1647 if (startIdx < 1 || size > 224) {
1648 if (g_debugMode==1)
1649 PrintAndLog("Error2: %d",ans);
1650 return -1;
1651 }
1652 setDemodBuf(DemodBuffer, size, startIdx);
1653 if (invert)
1654 if (g_debugMode==1)
1655 PrintAndLog("Had to invert bits");
1656
1657 PrintAndLog("BitLen: %d",DemodBufferLen);
1658 //convert UID to HEX
1659 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1660 uid1=bytebits_to_byte(DemodBuffer,32);
1661 uid2=bytebits_to_byte(DemodBuffer+32,32);
1662 if (DemodBufferLen==64){
1663 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1664 } else {
1665 uid3=bytebits_to_byte(DemodBuffer+64,32);
1666 uid4=bytebits_to_byte(DemodBuffer+96,32);
1667 uid5=bytebits_to_byte(DemodBuffer+128,32);
1668 uid6=bytebits_to_byte(DemodBuffer+160,32);
1669 uid7=bytebits_to_byte(DemodBuffer+192,32);
1670 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1671 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1672 }
1673 if (g_debugMode){
1674 PrintAndLog("DEBUG: printing demodbuffer:");
1675 printDemodBuff();
1676 }
1677 return 1;
1678 }
1679
1680 int CmdPSKNexWatch(const char *Cmd)
1681 {
1682 if (!PSKDemod("", false)) return 0;
1683 uint8_t preamble[28] = {0,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
1684 size_t startIdx = 0, size = DemodBufferLen;
1685 bool invert = false;
1686 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1687 // if didn't find preamble try again inverting
1688 if (!PSKDemod("1", false)) return 0;
1689 size = DemodBufferLen;
1690 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1691 invert = true;
1692 }
1693 if (size != 128) return 0;
1694 setDemodBuf(DemodBuffer, size, startIdx+4);
1695 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1696 //get ID
1697 uint32_t ID = 0;
1698 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1699 for (uint8_t idx=0; idx<8; idx++){
1700 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1701 }
1702 }
1703 //parity check (TBD)
1704
1705 //checksum check (TBD)
1706
1707 //output
1708 PrintAndLog("NexWatch ID: %d", ID);
1709 if (invert){
1710 PrintAndLog("Had to Invert - probably NexKey");
1711 for (uint8_t idx=0; idx<size; idx++)
1712 DemodBuffer[idx] ^= 1;
1713 }
1714
1715 CmdPrintDemodBuff("x");
1716 return 1;
1717 }
1718
1719 // by marshmellow
1720 // takes 3 arguments - clock, invert, maxErr as integers
1721 // attempts to demodulate nrz only
1722 // prints binary found and saves in demodbuffer for further commands
1723 int NRZrawDemod(const char *Cmd, bool verbose)
1724 {
1725 int invert=0;
1726 int clk=0;
1727 int maxErr=100;
1728 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1729 if (clk==1){
1730 invert=1;
1731 clk=0;
1732 }
1733 if (invert != 0 && invert != 1) {
1734 PrintAndLog("Invalid argument: %s", Cmd);
1735 return 0;
1736 }
1737 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1738 size_t BitLen = getFromGraphBuf(BitStream);
1739 if (BitLen==0) return 0;
1740 int errCnt=0;
1741 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
1742 if (errCnt > maxErr){
1743 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1744 return 0;
1745 }
1746 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1747 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1748 return 0;
1749 }
1750 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1751 //prime demod buffer for output
1752 setDemodBuf(BitStream,BitLen,0);
1753
1754 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1755 if (verbose || g_debugMode) {
1756 PrintAndLog("NRZ demoded bitstream:");
1757 // Now output the bitstream to the scrollback by line of 16 bits
1758 printDemodBuff();
1759 }
1760 return 1;
1761 }
1762
1763 int CmdNRZrawDemod(const char *Cmd)
1764 {
1765 char cmdp = param_getchar(Cmd, 0);
1766 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1767 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1768 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1769 PrintAndLog(" <invert>, 1 for invert output");
1770 PrintAndLog(" [set maximum allowed errors], default = 100.");
1771 PrintAndLog("");
1772 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1773 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1774 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1775 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1776 PrintAndLog(" : data rawdemod nr 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
1777 return 0;
1778 }
1779 return NRZrawDemod(Cmd, TRUE);
1780 }
1781
1782 // by marshmellow
1783 // takes 3 arguments - clock, invert, maxErr as integers
1784 // attempts to demodulate psk only
1785 // prints binary found and saves in demodbuffer for further commands
1786 int CmdPSK1rawDemod(const char *Cmd)
1787 {
1788 int ans;
1789 char cmdp = param_getchar(Cmd, 0);
1790 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1791 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1792 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1793 PrintAndLog(" <invert>, 1 for invert output");
1794 PrintAndLog(" [set maximum allowed errors], default = 100.");
1795 PrintAndLog("");
1796 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1797 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1798 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1799 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1800 PrintAndLog(" : data rawdemod p1 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
1801 return 0;
1802 }
1803 ans = PSKDemod(Cmd, TRUE);
1804 //output
1805 if (!ans){
1806 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1807 return 0;
1808 }
1809
1810 PrintAndLog("PSK1 demoded bitstream:");
1811 // Now output the bitstream to the scrollback by line of 16 bits
1812 printDemodBuff();
1813 return 1;
1814 }
1815
1816 // by marshmellow
1817 // takes same args as cmdpsk1rawdemod
1818 int CmdPSK2rawDemod(const char *Cmd)
1819 {
1820 int ans=0;
1821 char cmdp = param_getchar(Cmd, 0);
1822 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1823 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1824 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1825 PrintAndLog(" <invert>, 1 for invert output");
1826 PrintAndLog(" [set maximum allowed errors], default = 100.");
1827 PrintAndLog("");
1828 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1829 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1830 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1831 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1832 PrintAndLog(" : data rawdemod p2 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
1833 return 0;
1834 }
1835 ans=PSKDemod(Cmd, TRUE);
1836 if (!ans){
1837 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1838 return 0;
1839 }
1840 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1841 PrintAndLog("PSK2 demoded bitstream:");
1842 // Now output the bitstream to the scrollback by line of 16 bits
1843 printDemodBuff();
1844 return 1;
1845 }
1846
1847 // by marshmellow - combines all raw demod functions into one menu command
1848 int CmdRawDemod(const char *Cmd)
1849 {
1850 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1851
1852 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1853 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1854 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1855 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1856 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1857 PrintAndLog(" <options> see specific modulation help for optional parameters");
1858 PrintAndLog("");
1859 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1860 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1861 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1862 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1863 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1864 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1865 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1866 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1867 return 0;
1868 }
1869 char cmdp2 = Cmd[1];
1870 int ans = 0;
1871 if (cmdp == 'f' && cmdp2 == 's'){
1872 ans = CmdFSKrawdemod(Cmd+2);
1873 } else if(cmdp == 'a' && cmdp2 == 'b'){
1874 ans = Cmdaskbiphdemod(Cmd+2);
1875 } else if(cmdp == 'a' && cmdp2 == 'm'){
1876 ans = Cmdaskmandemod(Cmd+2);
1877 } else if(cmdp == 'a' && cmdp2 == 'r'){
1878 ans = Cmdaskrawdemod(Cmd+2);
1879 } else if(cmdp == 'n' && cmdp2 == 'r'){
1880 ans = CmdNRZrawDemod(Cmd+2);
1881 } else if(cmdp == 'p' && cmdp2 == '1'){
1882 ans = CmdPSK1rawDemod(Cmd+2);
1883 } else if(cmdp == 'p' && cmdp2 == '2'){
1884 ans = CmdPSK2rawDemod(Cmd+2);
1885 } else {
1886 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1887 }
1888 return ans;
1889 }
1890
1891 int CmdGrid(const char *Cmd)
1892 {
1893 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1894 PlotGridXdefault= PlotGridX;
1895 PlotGridYdefault= PlotGridY;
1896 RepaintGraphWindow();
1897 return 0;
1898 }
1899
1900 int CmdHexsamples(const char *Cmd)
1901 {
1902 int i, j;
1903 int requested = 0;
1904 int offset = 0;
1905 char string_buf[25];
1906 char* string_ptr = string_buf;
1907 uint8_t got[BIGBUF_SIZE];
1908
1909 sscanf(Cmd, "%i %i", &requested, &offset);
1910
1911 /* if no args send something */
1912 if (requested == 0) {
1913 requested = 8;
1914 }
1915 if (offset + requested > sizeof(got)) {
1916 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1917 return 0;
1918 }
1919
1920 GetFromBigBuf(got,requested,offset);
1921 WaitForResponse(CMD_ACK,NULL);
1922
1923 i = 0;
1924 for (j = 0; j < requested; j++) {
1925 i++;
1926 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1927 if (i == 8) {
1928 *(string_ptr - 1) = '\0'; // remove the trailing space
1929 PrintAndLog("%s", string_buf);
1930 string_buf[0] = '\0';
1931 string_ptr = string_buf;
1932 i = 0;
1933 }
1934 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1935 *(string_ptr - 1) = '\0';
1936 PrintAndLog("%s", string_buf);
1937 string_buf[0] = '\0';
1938 }
1939 }
1940 return 0;
1941 }
1942
1943 int CmdHide(const char *Cmd)
1944 {
1945 HideGraphWindow();
1946 return 0;
1947 }
1948
1949 //zero mean GraphBuffer
1950 int CmdHpf(const char *Cmd)
1951 {
1952 int i;
1953 int accum = 0;
1954
1955 for (i = 10; i < GraphTraceLen; ++i)
1956 accum += GraphBuffer[i];
1957 accum /= (GraphTraceLen - 10);
1958 for (i = 0; i < GraphTraceLen; ++i)
1959 GraphBuffer[i] -= accum;
1960
1961 RepaintGraphWindow();
1962 return 0;
1963 }
1964
1965 bool _headBit( BitstreamOut *stream)
1966 {
1967 int bytepos = stream->position >> 3; // divide by 8
1968 int bitpos = (stream->position++) & 7; // mask out 00000111
1969 return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
1970 }
1971
1972 uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
1973 {
1974 int i;
1975 uint8_t val = 0;
1976 for(i =0 ; i < bits_per_sample; i++)
1977 {
1978 val |= (_headBit(b) << (7-i));
1979 }
1980 return val;
1981 }
1982
1983 int getSamples(const char *Cmd, bool silent)
1984 {
1985 //If we get all but the last byte in bigbuf,
1986 // we don't have to worry about remaining trash
1987 // in the last byte in case the bits-per-sample
1988 // does not line up on byte boundaries
1989
1990 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1991
1992 int n = strtol(Cmd, NULL, 0);
1993
1994 if ( n == 0 || n > sizeof(got))
1995 n = sizeof(got);
1996
1997 PrintAndLog("Reading %d bytes from device memory\n", n);
1998 GetFromBigBuf(got,n,0);
1999 PrintAndLog("Data fetched");
2000 UsbCommand response;
2001 if ( !WaitForResponseTimeout(CMD_ACK, &response, 10000) ) {
2002 PrintAndLog("timeout while waiting for reply.");
2003 return 1;
2004 }
2005
2006 uint8_t bits_per_sample = 8;
2007
2008 //Old devices without this feature would send 0 at arg[0]
2009 if(response.arg[0] > 0)
2010 {
2011 sample_config *sc = (sample_config *) response.d.asBytes;
2012 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample, sc->decimation);
2013 bits_per_sample = sc->bits_per_sample;
2014 }
2015 if(bits_per_sample < 8)
2016 {
2017 PrintAndLog("Unpacking...");
2018 BitstreamOut bout = { got, bits_per_sample * n, 0};
2019 int j =0;
2020 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
2021 uint8_t sample = getByte(bits_per_sample, &bout);
2022 GraphBuffer[j] = ((int) sample )- 128;
2023 }
2024 GraphTraceLen = j;
2025 PrintAndLog("Unpacked %d samples" , j );
2026 }else
2027 {
2028 for (int j = 0; j < n; j++) {
2029 GraphBuffer[j] = ((int)got[j]) - 128;
2030 }
2031 GraphTraceLen = n;
2032 }
2033
2034 RepaintGraphWindow();
2035 return 0;
2036 }
2037
2038 int CmdSamples(const char *Cmd)
2039 {
2040 return getSamples(Cmd, false);
2041 }
2042
2043 int CmdTuneSamples(const char *Cmd)
2044 {
2045 int timeout = 0;
2046 printf("\nMeasuring antenna characteristics, please wait...");
2047
2048 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {0,0,0}};
2049 clearCommandBuffer();
2050 SendCommand(&c);
2051 UsbCommand resp;
2052 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING, &resp, 2000)) {
2053 timeout++;
2054 printf(".");
2055 if (timeout > 7) {
2056 PrintAndLog("\nNo response from Proxmark. Aborting...");
2057 return 1;
2058 }
2059 }
2060
2061 int peakv, peakf;
2062 int vLf125, vLf134, vHf;
2063 vLf125 = resp.arg[0] & 0xffff;
2064 vLf134 = resp.arg[0] >> 16;
2065 vHf = resp.arg[1] & 0xffff;;
2066 peakf = resp.arg[2] & 0xffff;
2067 peakv = resp.arg[2] >> 16;
2068 PrintAndLog("");
2069 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
2070 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
2071 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
2072 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
2073
2074 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
2075 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
2076 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2077 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2078
2079 if (peakv < LF_UNUSABLE_V)
2080 PrintAndLog("# Your LF antenna is unusable.");
2081 else if (peakv < LF_MARGINAL_V)
2082 PrintAndLog("# Your LF antenna is marginal.");
2083 if (vHf < HF_UNUSABLE_V)
2084 PrintAndLog("# Your HF antenna is unusable.");
2085 else if (vHf < HF_MARGINAL_V)
2086 PrintAndLog("# Your HF antenna is marginal.");
2087
2088 if (peakv >= LF_UNUSABLE_V) {
2089 for (int i = 0; i < 256; i++) {
2090 GraphBuffer[i] = resp.d.asBytes[i] - 128;
2091 }
2092 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
2093 PrintAndLog("\n");
2094 GraphTraceLen = 256;
2095 ShowGraphWindow();
2096 RepaintGraphWindow();
2097 }
2098 return 0;
2099 }
2100
2101
2102 int CmdLoad(const char *Cmd)
2103 {
2104 char filename[FILE_PATH_SIZE] = {0x00};
2105 int len = 0;
2106
2107 len = strlen(Cmd);
2108 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2109 memcpy(filename, Cmd, len);
2110
2111 FILE *f = fopen(filename, "r");
2112 if (!f) {
2113 PrintAndLog("couldn't open '%s'", filename);
2114 return 0;
2115 }
2116
2117 GraphTraceLen = 0;
2118 char line[80];
2119 while (fgets(line, sizeof (line), f)) {
2120 GraphBuffer[GraphTraceLen] = atoi(line);
2121 GraphTraceLen++;
2122 }
2123 fclose(f);
2124 PrintAndLog("loaded %d samples", GraphTraceLen);
2125 RepaintGraphWindow();
2126 return 0;
2127 }
2128
2129 int CmdLtrim(const char *Cmd)
2130 {
2131 int ds = atoi(Cmd);
2132
2133 if (GraphTraceLen <= 0) return 0;
2134
2135 for (int i = ds; i < GraphTraceLen; ++i)
2136 GraphBuffer[i-ds] = GraphBuffer[i];
2137
2138 GraphTraceLen -= ds;
2139 RepaintGraphWindow();
2140 return 0;
2141 }
2142
2143 // trim graph to input argument length
2144 int CmdRtrim(const char *Cmd)
2145 {
2146 int ds = atoi(Cmd);
2147 GraphTraceLen = ds;
2148 RepaintGraphWindow();
2149 return 0;
2150 }
2151
2152 int CmdNorm(const char *Cmd)
2153 {
2154 int i;
2155 int max = INT_MIN, min = INT_MAX;
2156
2157 for (i = 10; i < GraphTraceLen; ++i) {
2158 if (GraphBuffer[i] > max)
2159 max = GraphBuffer[i];
2160 if (GraphBuffer[i] < min)
2161 min = GraphBuffer[i];
2162 }
2163
2164 if (max != min) {
2165 for (i = 0; i < GraphTraceLen; ++i) {
2166 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
2167 (max - min);
2168 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
2169 }
2170 }
2171 RepaintGraphWindow();
2172 return 0;
2173 }
2174
2175 int CmdPlot(const char *Cmd)
2176 {
2177 ShowGraphWindow();
2178 return 0;
2179 }
2180
2181 int CmdSave(const char *Cmd)
2182 {
2183 char filename[FILE_PATH_SIZE] = {0x00};
2184 int len = 0;
2185
2186 len = strlen(Cmd);
2187 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2188 memcpy(filename, Cmd, len);
2189
2190
2191 FILE *f = fopen(filename, "w");
2192 if(!f) {
2193 PrintAndLog("couldn't open '%s'", filename);
2194 return 0;
2195 }
2196 int i;
2197 for (i = 0; i < GraphTraceLen; i++) {
2198 fprintf(f, "%d\n", GraphBuffer[i]);
2199 }
2200 fclose(f);
2201 PrintAndLog("saved to '%s'", Cmd);
2202 return 0;
2203 }
2204
2205 int CmdScale(const char *Cmd)
2206 {
2207 CursorScaleFactor = atoi(Cmd);
2208 if (CursorScaleFactor == 0) {
2209 PrintAndLog("bad, can't have zero scale");
2210 CursorScaleFactor = 1;
2211 }
2212 RepaintGraphWindow();
2213 return 0;
2214 }
2215
2216 int CmdDirectionalThreshold(const char *Cmd)
2217 {
2218 int8_t upThres = param_get8(Cmd, 0);
2219 int8_t downThres = param_get8(Cmd, 1);
2220
2221 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
2222
2223 int lastValue = GraphBuffer[0];
2224 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
2225
2226 for (int i = 1; i < GraphTraceLen; ++i) {
2227 // Apply first threshold to samples heading up
2228 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2229 {
2230 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2231 GraphBuffer[i] = 1;
2232 }
2233 // Apply second threshold to samples heading down
2234 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2235 {
2236 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2237 GraphBuffer[i] = -1;
2238 }
2239 else
2240 {
2241 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2242 GraphBuffer[i] = GraphBuffer[i-1];
2243
2244 }
2245 }
2246 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2247 RepaintGraphWindow();
2248 return 0;
2249 }
2250
2251 int CmdZerocrossings(const char *Cmd)
2252 {
2253 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2254 CmdHpf("");
2255
2256 int sign = 1;
2257 int zc = 0;
2258 int lastZc = 0;
2259
2260 for (int i = 0; i < GraphTraceLen; ++i) {
2261 if (GraphBuffer[i] * sign >= 0) {
2262 // No change in sign, reproduce the previous sample count.
2263 zc++;
2264 GraphBuffer[i] = lastZc;
2265 } else {
2266 // Change in sign, reset the sample count.
2267 sign = -sign;
2268 GraphBuffer[i] = lastZc;
2269 if (sign > 0) {
2270 lastZc = zc;
2271 zc = 0;
2272 }
2273 }
2274 }
2275
2276 RepaintGraphWindow();
2277 return 0;
2278 }
2279
2280 int usage_data_bin2hex(){
2281 PrintAndLog("Usage: data bin2hex <binary_digits>");
2282 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
2283 return 0;
2284 }
2285
2286 /**
2287 * @brief Utility for conversion via cmdline.
2288 * @param Cmd
2289 * @return
2290 */
2291 int Cmdbin2hex(const char *Cmd)
2292 {
2293 int bg =0, en =0;
2294 if(param_getptr(Cmd, &bg, &en, 0))
2295 {
2296 return usage_data_bin2hex();
2297 }
2298 //Number of digits supplied as argument
2299 size_t length = en - bg +1;
2300 size_t bytelen = (length+7) / 8;
2301 uint8_t* arr = (uint8_t *) malloc(bytelen);
2302 memset(arr, 0, bytelen);
2303 BitstreamOut bout = { arr, 0, 0 };
2304
2305 for(; bg <= en ;bg++)
2306 {
2307 char c = Cmd[bg];
2308 if( c == '1') pushBit(&bout, 1);
2309 else if( c == '0') pushBit(&bout, 0);
2310 else PrintAndLog("Ignoring '%c'", c);
2311 }
2312
2313 if(bout.numbits % 8 != 0)
2314 {
2315 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
2316 }
2317
2318 //Uses printf instead of PrintAndLog since the latter
2319 // adds linebreaks to each printout - this way was more convenient since we don't have to
2320 // allocate a string and write to that first...
2321 for(size_t x = 0; x < bytelen ; x++)
2322 {
2323 printf("%02X", arr[x]);
2324 }
2325 printf("\n");
2326 free(arr);
2327 return 0;
2328 }
2329
2330 int usage_data_hex2bin(){
2331 PrintAndLog("Usage: data hex2bin <hex_digits>");
2332 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
2333 return 0;
2334 }
2335
2336 int Cmdhex2bin(const char *Cmd)
2337 {
2338 int bg =0, en =0;
2339 if(param_getptr(Cmd, &bg, &en, 0)) return usage_data_hex2bin();
2340
2341 while(bg <= en )
2342 {
2343 char x = Cmd[bg++];
2344 // capitalize
2345 if (x >= 'a' && x <= 'f')
2346 x -= 32;
2347 // convert to numeric value
2348 if (x >= '0' && x <= '9')
2349 x -= '0';
2350 else if (x >= 'A' && x <= 'F')
2351 x -= 'A' - 10;
2352 else
2353 continue;
2354
2355 //Uses printf instead of PrintAndLog since the latter
2356 // adds linebreaks to each printout - this way was more convenient since we don't have to
2357 // allocate a string and write to that first...
2358
2359 for(int i= 0 ; i < 4 ; ++i)
2360 printf("%d",(x >> (3 - i)) & 1);
2361 }
2362 printf("\n");
2363
2364 return 0;
2365 }
2366
2367 static command_t CommandTable[] =
2368 {
2369 {"help", CmdHelp, 1, "This help"},
2370 {"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using the length of sample differences to detect the edge of a wave (use 20-45, def:25)"},
2371 {"askem410xdemod", CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
2372 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
2373 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking AM tag from GraphBuffer"},
2374 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
2375 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
2376 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
2377 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
2378 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2379 {"dec", CmdDec, 1, "Decimate samples"},
2380 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
2381 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
2382 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
2383 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
2384 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2385 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2386 {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2387 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
2388 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
2389 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
2390 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
2391 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
2392 {"hide", CmdHide, 1, "Hide graph window"},
2393 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
2394 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2395 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
2396 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
2397 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
2398 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
2399 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
2400 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
2401 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
2402 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
2403 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2404 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
2405 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2406 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
2407 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
2408 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
2409 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2410 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
2411 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
2412 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
2413 {NULL, NULL, 0, NULL}
2414 };
2415
2416 int CmdData(const char *Cmd){
2417 clearCommandBuffer();
2418 CmdsParse(CommandTable, Cmd);
2419 return 0;
2420 }
2421
2422 int CmdHelp(const char *Cmd)
2423 {
2424 CmdsHelp(CommandTable);
2425 return 0;
2426 }
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