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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("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
606 uint32_t ByteStream[65] = {0x00};
607 uint8_t xorKey=0;
608 uint8_t keyCnt=0;
609 uint8_t bitCnt=0;
610 uint8_t ByteCnt=0;
611 size_t startIdx = ans + 6; //start after preamble
612 for (size_t idx = 0; idx<size-6; idx++){
613 if ((idx+1) % 5 == 0){
614 //spacer bit - should be 0
615 if (DemodBuffer[startIdx+idx] != 0) {
616 if (g_debugMode) PrintAndLog("Error spacer not 0: %d, pos: %d",DemodBuffer[startIdx+idx],startIdx+idx);
617 return 0;
618 }
619 continue;
620 }
621 if (keyCnt<8){ //lsb first
622 xorKey = xorKey | (DemodBuffer[startIdx+idx]<<keyCnt);
623 keyCnt++;
624 if (keyCnt==8 && g_debugMode) PrintAndLog("xorKey Found: %02x", xorKey);
625 continue;
626 }
627 //lsb first
628 ByteStream[ByteCnt] = ByteStream[ByteCnt] | (DemodBuffer[startIdx+idx]<<bitCnt);
629 bitCnt++;
630 if (bitCnt % 8 == 0){
631 if (g_debugMode) PrintAndLog("byte %d: %02x",ByteCnt,ByteStream[ByteCnt]);
632 bitCnt=0;
633 ByteCnt++;
634 }
635 }
636 for (uint8_t i = 0; i < ByteCnt; i++){
637 ByteStream[i] ^= xorKey; //xor
638 if (g_debugMode) PrintAndLog("byte %d after xor: %02x", i, ByteStream[i]);
639 }
640 //now ByteStream contains 64 bytes of decrypted raw tag data
641 //
642 uint8_t fmtLen = ByteStream[0]>>2;
643 uint32_t FC = 0;
644 uint32_t Card = 0;
645 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
646 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
647 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
648
649 if (fmtLen==36){
650 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
651 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
652 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %d, Card %d",fmtLen,FC,Card);
653 } else if(fmtLen==26){
654 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
655 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
656 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %d, Card %d",fmtLen,FC,Card);
657 } else {
658 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",fmtLen);
659 }
660 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
661 setDemodBuf(DemodBuffer+ans, 96, 0);
662 return 1;
663 }
664
665 //by marshmellow
666 //see ASKDemod for what args are accepted
667 int CmdVikingDemod(const char *Cmd)
668 {
669 if (!ASKDemod(Cmd, false, false, 1)) {
670 if (g_debugMode) PrintAndLog("ASKDemod failed");
671 return 0;
672 }
673 size_t size = DemodBufferLen;
674 //call lfdemod.c demod for Viking
675 int ans = VikingDemod_AM(DemodBuffer, &size);
676 if (ans < 0) {
677 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
678 return 0;
679 }
680 //got a good demod
681 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
682 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
683 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
684 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
685 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, checksum);
686 PrintAndLog("Raw: %08X%08X", raw1,raw2);
687 setDemodBuf(DemodBuffer+ans, 64, 0);
688 return 1;
689 }
690
691 //by marshmellow - see ASKDemod
692 int Cmdaskrawdemod(const char *Cmd)
693 {
694 char cmdp = param_getchar(Cmd, 0);
695 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
696 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
697 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
698 PrintAndLog(" <invert>, 1 to invert output");
699 PrintAndLog(" [set maximum allowed errors], default = 100");
700 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
701 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
702 PrintAndLog("");
703 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
704 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
705 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
706 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
707 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
708 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");
709 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");
710 return 0;
711 }
712 return ASKDemod(Cmd, TRUE, FALSE, 0);
713 }
714
715 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
716 {
717 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
718 size_t Correlation = 0;
719 int maxSum = 0;
720 int lastMax = 0;
721 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
722 for (int i = 0; i < GraphTraceLen - window; ++i) {
723 int sum = 0;
724 for (int j = 0; j < window; ++j) {
725 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
726 }
727 CorrelBuffer[i] = sum;
728 if (sum >= maxSum-100 && sum <= maxSum+100){
729 //another max
730 Correlation = i-lastMax;
731 lastMax = i;
732 if (sum > maxSum) maxSum = sum;
733 } else if (sum > maxSum){
734 maxSum=sum;
735 lastMax = i;
736 }
737 }
738 if (Correlation==0){
739 //try again with wider margin
740 for (int i = 0; i < GraphTraceLen - window; i++){
741 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
742 //another max
743 Correlation = i-lastMax;
744 lastMax = i;
745 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
746 }
747 }
748 }
749 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
750
751 if (SaveGrph){
752 GraphTraceLen = GraphTraceLen - window;
753 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
754 RepaintGraphWindow();
755 }
756 return Correlation;
757 }
758
759 int usage_data_autocorr(void)
760 {
761 //print help
762 PrintAndLog("Usage: data autocorr [window] [g]");
763 PrintAndLog("Options: ");
764 PrintAndLog(" h This help");
765 PrintAndLog(" [window] window length for correlation - default = 4000");
766 PrintAndLog(" g save back to GraphBuffer (overwrite)");
767 return 0;
768 }
769
770 int CmdAutoCorr(const char *Cmd)
771 {
772 char cmdp = param_getchar(Cmd, 0);
773 if (cmdp == 'h' || cmdp == 'H')
774 return usage_data_autocorr();
775 int window = 4000; //set default
776 char grph=0;
777 bool updateGrph = FALSE;
778 sscanf(Cmd, "%i %c", &window, &grph);
779
780 if (window >= GraphTraceLen) {
781 PrintAndLog("window must be smaller than trace (%d samples)",
782 GraphTraceLen);
783 return 0;
784 }
785 if (grph == 'g') updateGrph=TRUE;
786 return AutoCorrelate(window, updateGrph, TRUE);
787 }
788
789 int CmdBitsamples(const char *Cmd)
790 {
791 int cnt = 0;
792 uint8_t got[12288];
793
794 GetFromBigBuf(got,sizeof(got),0);
795 WaitForResponse(CMD_ACK,NULL);
796
797 for (int j = 0; j < sizeof(got); j++) {
798 for (int k = 0; k < 8; k++) {
799 if(got[j] & (1 << (7 - k))) {
800 GraphBuffer[cnt++] = 1;
801 } else {
802 GraphBuffer[cnt++] = 0;
803 }
804 }
805 }
806 GraphTraceLen = cnt;
807 RepaintGraphWindow();
808 return 0;
809 }
810
811 int CmdBuffClear(const char *Cmd)
812 {
813 UsbCommand c = {CMD_BUFF_CLEAR};
814 SendCommand(&c);
815 ClearGraph(true);
816 return 0;
817 }
818
819 int CmdDec(const char *Cmd)
820 {
821 for (int i = 0; i < (GraphTraceLen / 2); ++i)
822 GraphBuffer[i] = GraphBuffer[i * 2];
823 GraphTraceLen /= 2;
824 PrintAndLog("decimated by 2");
825 RepaintGraphWindow();
826 return 0;
827 }
828 /**
829 * Undecimate - I'd call it 'interpolate', but we'll save that
830 * name until someone does an actual interpolation command, not just
831 * blindly repeating samples
832 * @param Cmd
833 * @return
834 */
835 int CmdUndec(const char *Cmd)
836 {
837 if(param_getchar(Cmd, 0) == 'h')
838 {
839 PrintAndLog("Usage: data undec [factor]");
840 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
841 PrintAndLog("Options: ");
842 PrintAndLog(" h This help");
843 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
844 PrintAndLog("Example: 'data undec 3'");
845 return 0;
846 }
847
848 uint8_t factor = param_get8ex(Cmd, 0, 2, 10);
849 //We have memory, don't we?
850 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
851 uint32_t g_index = 0 ,s_index = 0;
852 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
853 {
854 int count = 0;
855 for (count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
856 swap[s_index+count] = GraphBuffer[g_index];
857 s_index += count;
858 g_index++;
859 }
860
861 memcpy(GraphBuffer, swap, s_index * sizeof(int));
862 GraphTraceLen = s_index;
863 RepaintGraphWindow();
864 return 0;
865 }
866
867 //by marshmellow
868 //shift graph zero up or down based on input + or -
869 int CmdGraphShiftZero(const char *Cmd)
870 {
871
872 int shift=0;
873 //set options from parameters entered with the command
874 sscanf(Cmd, "%i", &shift);
875 int shiftedVal=0;
876 for(int i = 0; i<GraphTraceLen; i++){
877 shiftedVal=GraphBuffer[i]+shift;
878 if (shiftedVal>127)
879 shiftedVal=127;
880 else if (shiftedVal<-127)
881 shiftedVal=-127;
882 GraphBuffer[i]= shiftedVal;
883 }
884 CmdNorm("");
885 return 0;
886 }
887
888 //by marshmellow
889 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
890 //similar to dirtheshold, threshold commands
891 //takes a threshold length which is the measured length between two samples then determines an edge
892 int CmdAskEdgeDetect(const char *Cmd)
893 {
894 int thresLen = 25;
895 sscanf(Cmd, "%i", &thresLen);
896
897 for(int i = 1; i<GraphTraceLen; i++){
898 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
899 GraphBuffer[i-1] = 127;
900 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
901 GraphBuffer[i-1] = -127;
902 }
903 RepaintGraphWindow();
904 return 0;
905 }
906
907 /* Print our clock rate */
908 // uses data from graphbuffer
909 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
910 int CmdDetectClockRate(const char *Cmd)
911 {
912 char cmdp = param_getchar(Cmd, 0);
913 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
914 PrintAndLog("Usage: data detectclock [modulation] <clock>");
915 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
916 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
917 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
918 PrintAndLog("");
919 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
920 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
921 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
922 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
923 }
924 int ans=0;
925 if (cmdp == 'a'){
926 ans = GetAskClock(Cmd+1, true, false);
927 } else if (cmdp == 'f'){
928 ans = GetFskClock("", true, false);
929 } else if (cmdp == 'n'){
930 ans = GetNrzClock("", true, false);
931 } else if (cmdp == 'p'){
932 ans = GetPskClock("", true, false);
933 } else {
934 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
935 }
936 return ans;
937 }
938
939 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
940 {
941 static char fType[8];
942 memset(fType, 0x00, 8);
943 char *fskType = fType;
944 if (fchigh==10 && fclow==8){
945 if (invert) //fsk2a
946 memcpy(fskType, "FSK2a", 5);
947 else //fsk2
948 memcpy(fskType, "FSK2", 4);
949 } else if (fchigh == 8 && fclow == 5) {
950 if (invert)
951 memcpy(fskType, "FSK1", 4);
952 else
953 memcpy(fskType, "FSK1a", 5);
954 } else {
955 memcpy(fskType, "FSK??", 5);
956 }
957 return fskType;
958 }
959
960 //by marshmellow
961 //fsk raw demod and print binary
962 //takes 4 arguments - Clock, invert, fchigh, fclow
963 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
964 int FSKrawDemod(const char *Cmd, bool verbose)
965 {
966 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
967 uint8_t rfLen, invert, fchigh, fclow;
968
969 //set defaults
970 //set options from parameters entered with the command
971 rfLen = param_get8(Cmd, 0);
972 invert = param_get8(Cmd, 1);
973 fchigh = param_get8(Cmd, 2);
974 fclow = param_get8(Cmd, 3);
975 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
976 if (rfLen==1) {
977 invert = 1; //if invert option only is used
978 rfLen = 0;
979 }
980 }
981
982 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
983 size_t BitLen = getFromGraphBuf(BitStream);
984 if (BitLen==0) return 0;
985 //get field clock lengths
986 uint16_t fcs=0;
987 if (!fchigh || !fclow) {
988 fcs = countFC(BitStream, BitLen, 1);
989 if (!fcs) {
990 fchigh = 10;
991 fclow = 8;
992 } else {
993 fchigh = (fcs >> 8) & 0x00FF;
994 fclow = fcs & 0x00FF;
995 }
996 }
997 //get bit clock length
998 if (!rfLen) {
999 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
1000 if (!rfLen) rfLen = 50;
1001 }
1002 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
1003 if (size > 0) {
1004 setDemodBuf(BitStream, size, 0);
1005
1006 // Now output the bitstream to the scrollback by line of 16 bits
1007 if (verbose || g_debugMode) {
1008 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
1009 PrintAndLog("%s decoded bitstream:", GetFSKType(fchigh, fclow, invert));
1010 printDemodBuff();
1011 }
1012
1013 return 1;
1014 } else {
1015 if (g_debugMode) PrintAndLog("no FSK data found");
1016 }
1017 return 0;
1018 }
1019
1020 //by marshmellow
1021 //fsk raw demod and print binary
1022 //takes 4 arguments - Clock, invert, fchigh, fclow
1023 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
1024 int CmdFSKrawdemod(const char *Cmd)
1025 {
1026 char cmdp = param_getchar(Cmd, 0);
1027 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1028 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
1029 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
1030 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
1031 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
1032 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
1033 PrintAndLog("");
1034 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
1035 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
1036 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
1037 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
1038 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
1039 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
1040 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
1041 return 0;
1042 }
1043 return FSKrawDemod(Cmd, TRUE);
1044 }
1045
1046 //by marshmellow (based on existing demod + holiman's refactor)
1047 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
1048 //print full HID Prox ID and some bit format details if found
1049 int CmdFSKdemodHID(const char *Cmd)
1050 {
1051 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1052 uint32_t hi2=0, hi=0, lo=0;
1053
1054 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1055 size_t BitLen = getFromGraphBuf(BitStream);
1056 if (BitLen==0) return 0;
1057 //get binary from fsk wave
1058 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1059 if (idx<0){
1060 if (g_debugMode){
1061 if (idx==-1){
1062 PrintAndLog("DEBUG: Just Noise Detected");
1063 } else if (idx == -2) {
1064 PrintAndLog("DEBUG: Error demoding fsk");
1065 } else if (idx == -3) {
1066 PrintAndLog("DEBUG: Preamble not found");
1067 } else if (idx == -4) {
1068 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
1069 } else {
1070 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1071 }
1072 }
1073 return 0;
1074 }
1075 if (hi2==0 && hi==0 && lo==0) {
1076 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
1077 return 0;
1078 }
1079 if (hi2 != 0){ //extra large HID tags
1080 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
1081 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
1082 }
1083 else { //standard HID tags <38 bits
1084 uint8_t fmtLen = 0;
1085 uint32_t fc = 0;
1086 uint32_t cardnum = 0;
1087 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
1088 uint32_t lo2=0;
1089 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
1090 uint8_t idx3 = 1;
1091 while(lo2>1){ //find last bit set to 1 (format len bit)
1092 lo2=lo2>>1;
1093 idx3++;
1094 }
1095 fmtLen =idx3+19;
1096 fc =0;
1097 cardnum=0;
1098 if(fmtLen==26){
1099 cardnum = (lo>>1)&0xFFFF;
1100 fc = (lo>>17)&0xFF;
1101 }
1102 if(fmtLen==34){
1103 cardnum = (lo>>1)&0xFFFF;
1104 fc= ((hi&1)<<15)|(lo>>17);
1105 }
1106 if(fmtLen==35){
1107 cardnum = (lo>>1)&0xFFFFF;
1108 fc = ((hi&1)<<11)|(lo>>21);
1109 }
1110 }
1111 else { //if bit 38 is not set then 37 bit format is used
1112 fmtLen = 37;
1113 fc = 0;
1114 cardnum = 0;
1115 if(fmtLen == 37){
1116 cardnum = (lo>>1)&0x7FFFF;
1117 fc = ((hi&0xF)<<12)|(lo>>20);
1118 }
1119 }
1120 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
1121 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
1122 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
1123 }
1124 setDemodBuf(BitStream,BitLen,idx);
1125 if (g_debugMode){
1126 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
1127 printDemodBuff();
1128 }
1129 return 1;
1130 }
1131
1132 //by marshmellow
1133 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
1134 //print full Paradox Prox ID and some bit format details if found
1135 int CmdFSKdemodParadox(const char *Cmd)
1136 {
1137 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1138 uint32_t hi2=0, hi=0, lo=0;
1139
1140 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1141 size_t BitLen = getFromGraphBuf(BitStream);
1142 if (BitLen==0) return 0;
1143 //get binary from fsk wave
1144 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1145 if (idx<0){
1146 if (g_debugMode){
1147 if (idx==-1){
1148 PrintAndLog("DEBUG: Just Noise Detected");
1149 } else if (idx == -2) {
1150 PrintAndLog("DEBUG: Error demoding fsk");
1151 } else if (idx == -3) {
1152 PrintAndLog("DEBUG: Preamble not found");
1153 } else if (idx == -4) {
1154 PrintAndLog("DEBUG: Error in Manchester data");
1155 } else {
1156 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1157 }
1158 }
1159 return 0;
1160 }
1161 if (hi2==0 && hi==0 && lo==0){
1162 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1163 return 0;
1164 }
1165 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1166 uint32_t cardnum = (lo>>10)&0xFFFF;
1167 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1168 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1169 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1170
1171 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1172 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
1173 setDemodBuf(BitStream,BitLen,idx);
1174 if (g_debugMode){
1175 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1176 printDemodBuff();
1177 }
1178 return 1;
1179 }
1180
1181 //by marshmellow
1182 //IO-Prox demod - FSK RF/64 with preamble of 000000001
1183 //print ioprox ID and some format details
1184 int CmdFSKdemodIO(const char *Cmd)
1185 {
1186 int idx=0;
1187 //something in graphbuffer?
1188 if (GraphTraceLen < 65) {
1189 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1190 return 0;
1191 }
1192 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1193 size_t BitLen = getFromGraphBuf(BitStream);
1194 if (BitLen==0) return 0;
1195
1196 //get binary from fsk wave
1197 idx = IOdemodFSK(BitStream,BitLen);
1198 if (idx<0){
1199 if (g_debugMode){
1200 if (idx==-1){
1201 PrintAndLog("DEBUG: Just Noise Detected");
1202 } else if (idx == -2) {
1203 PrintAndLog("DEBUG: not enough samples");
1204 } else if (idx == -3) {
1205 PrintAndLog("DEBUG: error during fskdemod");
1206 } else if (idx == -4) {
1207 PrintAndLog("DEBUG: Preamble not found");
1208 } else if (idx == -5) {
1209 PrintAndLog("DEBUG: Separator bits not found");
1210 } else {
1211 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1212 }
1213 }
1214 return 0;
1215 }
1216 if (idx==0){
1217 if (g_debugMode){
1218 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1219 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
1220 }
1221 return 0;
1222 }
1223 //Index map
1224 //0 10 20 30 40 50 60
1225 //| | | | | | |
1226 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1227 //-----------------------------------------------------------------------------
1228 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1229 //
1230 //XSF(version)facility:codeone+codetwo (raw)
1231 //Handle the data
1232 if (idx+64>BitLen) {
1233 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1234 return 0;
1235 }
1236 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]);
1237 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]);
1238 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]);
1239 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]);
1240 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]);
1241 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]);
1242 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]);
1243
1244 uint32_t code = bytebits_to_byte(BitStream+idx,32);
1245 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
1246 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1247 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
1248 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
1249 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
1250 uint16_t calccrc = 0;
1251
1252 for (uint8_t i=1; i<6; ++i){
1253 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
1254 }
1255 calccrc &= 0xff;
1256 calccrc = 0xff - calccrc;
1257
1258 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
1259
1260 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
1261 setDemodBuf(BitStream,64,idx);
1262 if (g_debugMode){
1263 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1264 printDemodBuff();
1265 }
1266 return 1;
1267 }
1268
1269 //by marshmellow
1270 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1271 //print full AWID Prox ID and some bit format details if found
1272 int CmdFSKdemodAWID(const char *Cmd)
1273 {
1274 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1275 size_t size = getFromGraphBuf(BitStream);
1276 if (size==0) return 0;
1277
1278 //get binary from fsk wave
1279 int idx = AWIDdemodFSK(BitStream, &size);
1280 if (idx<=0){
1281 if (g_debugMode==1){
1282 if (idx == -1)
1283 PrintAndLog("DEBUG: Error - not enough samples");
1284 else if (idx == -2)
1285 PrintAndLog("DEBUG: Error - only noise found");
1286 else if (idx == -3)
1287 PrintAndLog("DEBUG: Error - problem during FSK demod");
1288 else if (idx == -4)
1289 PrintAndLog("DEBUG: Error - AWID preamble not found");
1290 else if (idx == -5)
1291 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1292 else
1293 PrintAndLog("DEBUG: Error %d",idx);
1294 }
1295 return 0;
1296 }
1297
1298 // Index map
1299 // 0 10 20 30 40 50 60
1300 // | | | | | | |
1301 // 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
1302 // -----------------------------------------------------------------------------
1303 // 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
1304 // 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
1305 // |---26 bit---| |-----117----||-------------142-------------|
1306 // b = format bit len, o = odd parity of last 3 bits
1307 // f = facility code, c = card number
1308 // w = wiegand parity
1309 // (26 bit format shown)
1310
1311 //get raw ID before removing parities
1312 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1313 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1314 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1315 setDemodBuf(BitStream,96,idx);
1316
1317 size = removeParity(BitStream, idx+8, 4, 1, 88);
1318 if (size != 66){
1319 if (g_debugMode==1) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1320 return 0;
1321 }
1322 // ok valid card found!
1323
1324 // Index map
1325 // 0 10 20 30 40 50 60
1326 // | | | | | | |
1327 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1328 // -----------------------------------------------------------------------------
1329 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1330 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1331 // |26 bit| |-117--| |-----142------|
1332 // b = format bit len, o = odd parity of last 3 bits
1333 // f = facility code, c = card number
1334 // w = wiegand parity
1335 // (26 bit format shown)
1336
1337 uint32_t fc = 0;
1338 uint32_t cardnum = 0;
1339 uint32_t code1 = 0;
1340 uint32_t code2 = 0;
1341 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
1342 if (fmtLen==26){
1343 fc = bytebits_to_byte(BitStream+9, 8);
1344 cardnum = bytebits_to_byte(BitStream+17, 16);
1345 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1346 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1347 } else {
1348 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1349 if (fmtLen>32){
1350 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1351 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
1352 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1353 } else{
1354 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1355 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1356 }
1357 }
1358 if (g_debugMode){
1359 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1360 printDemodBuff();
1361 }
1362 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
1363 return 1;
1364 }
1365
1366 //by marshmellow
1367 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1368 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1369 int CmdFSKdemodPyramid(const char *Cmd)
1370 {
1371 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1372 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1373 size_t size = getFromGraphBuf(BitStream);
1374 if (size==0) return 0;
1375
1376 //get binary from fsk wave
1377 int idx = PyramiddemodFSK(BitStream, &size);
1378 if (idx < 0){
1379 if (g_debugMode==1){
1380 if (idx == -5)
1381 PrintAndLog("DEBUG: Error - not enough samples");
1382 else if (idx == -1)
1383 PrintAndLog("DEBUG: Error - only noise found");
1384 else if (idx == -2)
1385 PrintAndLog("DEBUG: Error - problem during FSK demod");
1386 else if (idx == -3)
1387 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1388 else if (idx == -4)
1389 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1390 else
1391 PrintAndLog("DEBUG: Error - idx: %d",idx);
1392 }
1393 return 0;
1394 }
1395 // Index map
1396 // 0 10 20 30 40 50 60
1397 // | | | | | | |
1398 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1399 // -----------------------------------------------------------------------------
1400 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1401 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1402
1403 // 64 70 80 90 100 110 120
1404 // | | | | | | |
1405 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1406 // -----------------------------------------------------------------------------
1407 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1408 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1409 // |---115---||---------71---------|
1410 // s = format start bit, o = odd parity of last 7 bits
1411 // f = facility code, c = card number
1412 // w = wiegand parity, x = extra space for other formats
1413 // p = unknown checksum
1414 // (26 bit format shown)
1415
1416 //get bytes for checksum calc
1417 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
1418 uint8_t csBuff[14] = {0x00};
1419 for (uint8_t i = 0; i < 13; i++){
1420 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
1421 }
1422 //check checksum calc
1423 //checksum calc thanks to ICEMAN!!
1424 uint32_t checkCS = CRC8Maxim(csBuff,13);
1425
1426 //get raw ID before removing parities
1427 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1428 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1429 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1430 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
1431 setDemodBuf(BitStream,128,idx);
1432
1433 size = removeParity(BitStream, idx+8, 8, 1, 120);
1434 if (size != 105){
1435 if (g_debugMode==1)
1436 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1437 return 0;
1438 }
1439
1440 // ok valid card found!
1441
1442 // Index map
1443 // 0 10 20 30 40 50 60 70
1444 // | | | | | | | |
1445 // 01234567890123456789012345678901234567890123456789012345678901234567890
1446 // -----------------------------------------------------------------------
1447 // 00000000000000000000000000000000000000000000000000000000000000000000000
1448 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1449
1450 // 71 80 90 100
1451 // | | | |
1452 // 1 2 34567890 1234567890123456 7 8901234
1453 // ---------------------------------------
1454 // 1 1 01110011 0000000001000110 0 1001010
1455 // s w ffffffff cccccccccccccccc w ppppppp
1456 // |--115-| |------71------|
1457 // s = format start bit, o = odd parity of last 7 bits
1458 // f = facility code, c = card number
1459 // w = wiegand parity, x = extra space for other formats
1460 // p = unknown checksum
1461 // (26 bit format shown)
1462
1463 //find start bit to get fmtLen
1464 int j;
1465 for (j=0; j<size; j++){
1466 if(BitStream[j]) break;
1467 }
1468 uint8_t fmtLen = size-j-8;
1469 uint32_t fc = 0;
1470 uint32_t cardnum = 0;
1471 uint32_t code1 = 0;
1472 if (fmtLen==26){
1473 fc = bytebits_to_byte(BitStream+73, 8);
1474 cardnum = bytebits_to_byte(BitStream+81, 16);
1475 code1 = bytebits_to_byte(BitStream+72,fmtLen);
1476 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);
1477 } else if (fmtLen==45){
1478 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
1479 fc = bytebits_to_byte(BitStream+53, 10);
1480 cardnum = bytebits_to_byte(BitStream+63, 32);
1481 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1482 } else {
1483 cardnum = bytebits_to_byte(BitStream+81, 16);
1484 if (fmtLen>32){
1485 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
1486 //code2 = bytebits_to_byte(BitStream+(size-32),32);
1487 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1488 } else{
1489 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
1490 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1491 }
1492 }
1493 if (checksum == checkCS)
1494 PrintAndLog("Checksum %02x passed", checksum);
1495 else
1496 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
1497
1498 if (g_debugMode){
1499 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1500 printDemodBuff();
1501 }
1502 return 1;
1503 }
1504
1505 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
1506 // 8 databits + 1 parity (1)
1507 // CIITT 16 chksum
1508 // NATIONAL CODE, ICAR database
1509 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
1510 // FLAG (animal/non-animal)
1511 /*
1512 38 IDbits
1513 10 country code
1514 1 extra app bit
1515 14 reserved bits
1516 1 animal bit
1517 16 ccitt CRC chksum over 64bit ID CODE.
1518 24 appli bits.
1519
1520 -- sample: 985121004515220 [ 37FF65B88EF94 ]
1521 */
1522 int CmdFDXBdemodBI(const char *Cmd){
1523
1524 int invert = 1;
1525 int clk = 32;
1526 int errCnt = 0;
1527 int maxErr = 0;
1528 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
1529 size_t size = getFromGraphBuf(BitStream);
1530
1531 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
1532 if ( errCnt < 0 || errCnt > maxErr ) {
1533 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
1534 return 0;
1535 }
1536
1537 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
1538 if (errCnt < 0 || errCnt > maxErr ) {
1539 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
1540 return 0;
1541 }
1542
1543 int preambleIndex = FDXBdemodBI(BitStream, &size);
1544 if (preambleIndex < 0){
1545 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
1546 return 0;
1547 }
1548 if (size != 128) {
1549 if (g_debugMode) PrintAndLog("Error incorrect data length found");
1550 return 0;
1551 }
1552
1553 setDemodBuf(BitStream, 128, preambleIndex);
1554
1555 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
1556 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
1557 if ( size != 104 ) {
1558 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1559 return 0;
1560 }
1561 if (g_debugMode) {
1562 char *bin = sprint_bin_break(BitStream,size,16);
1563 PrintAndLog("DEBUG BinStream:\n%s",bin);
1564 }
1565 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1566 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1567
1568 //got a good demod
1569 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1570 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1571 uint8_t dataBlockBit = BitStream[48];
1572 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1573 uint8_t animalBit = BitStream[63];
1574 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1575 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1576
1577 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1578 uint8_t raw[8];
1579 num_to_bytes(rawid, 8, raw);
1580
1581 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1582
1583 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1584 PrintAndLog("Animal ID: %04u-%012llu", countryCode, NationalCode);
1585 PrintAndLog("National Code: %012llu", NationalCode);
1586 PrintAndLog("CountryCode: %04u", countryCode);
1587 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1588 PrintAndLog("reserved Code: %u", reservedCode);
1589 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1590 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1591 PrintAndLog("Extended: 0x%X\n", extended);
1592
1593 return 1;
1594 }
1595
1596
1597 //by marshmellow
1598 //attempt to psk1 demod graph buffer
1599 int PSKDemod(const char *Cmd, bool verbose)
1600 {
1601 int invert=0;
1602 int clk=0;
1603 int maxErr=100;
1604 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1605 if (clk==1){
1606 invert=1;
1607 clk=0;
1608 }
1609 if (invert != 0 && invert != 1) {
1610 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1611 return 0;
1612 }
1613 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1614 size_t BitLen = getFromGraphBuf(BitStream);
1615 if (BitLen==0) return 0;
1616 uint8_t carrier=countFC(BitStream, BitLen, 0);
1617 if (carrier!=2 && carrier!=4 && carrier!=8){
1618 //invalid carrier
1619 return 0;
1620 }
1621 if (g_debugMode){
1622 PrintAndLog("Carrier: rf/%d",carrier);
1623 }
1624 int errCnt=0;
1625 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1626 if (errCnt > maxErr){
1627 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1628 return 0;
1629 }
1630 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1631 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1632 return 0;
1633 }
1634 if (verbose || g_debugMode){
1635 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1636 if (errCnt>0){
1637 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1638 }
1639 }
1640 //prime demod buffer for output
1641 setDemodBuf(BitStream,BitLen,0);
1642 return 1;
1643 }
1644
1645 // Indala 26 bit decode
1646 // by marshmellow
1647 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1648 int CmdIndalaDecode(const char *Cmd)
1649 {
1650 int ans;
1651 if (strlen(Cmd)>0){
1652 ans = PSKDemod(Cmd, 0);
1653 } else{ //default to RF/32
1654 ans = PSKDemod("32", 0);
1655 }
1656
1657 if (!ans){
1658 if (g_debugMode==1)
1659 PrintAndLog("Error1: %d",ans);
1660 return 0;
1661 }
1662 uint8_t invert=0;
1663 size_t size = DemodBufferLen;
1664 size_t startIdx = indala26decode(DemodBuffer, &size, &invert);
1665 if (startIdx < 1 || size > 224) {
1666 if (g_debugMode==1)
1667 PrintAndLog("Error2: %d",ans);
1668 return -1;
1669 }
1670 setDemodBuf(DemodBuffer, size, startIdx);
1671 if (invert)
1672 if (g_debugMode==1)
1673 PrintAndLog("Had to invert bits");
1674
1675 PrintAndLog("BitLen: %d",DemodBufferLen);
1676 //convert UID to HEX
1677 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1678 uid1=bytebits_to_byte(DemodBuffer,32);
1679 uid2=bytebits_to_byte(DemodBuffer+32,32);
1680 if (DemodBufferLen==64){
1681 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1682 } else {
1683 uid3=bytebits_to_byte(DemodBuffer+64,32);
1684 uid4=bytebits_to_byte(DemodBuffer+96,32);
1685 uid5=bytebits_to_byte(DemodBuffer+128,32);
1686 uid6=bytebits_to_byte(DemodBuffer+160,32);
1687 uid7=bytebits_to_byte(DemodBuffer+192,32);
1688 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1689 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1690 }
1691 if (g_debugMode){
1692 PrintAndLog("DEBUG: printing demodbuffer:");
1693 printDemodBuff();
1694 }
1695 return 1;
1696 }
1697
1698 int CmdPSKNexWatch(const char *Cmd)
1699 {
1700 if (!PSKDemod("", false)) return 0;
1701 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};
1702 size_t startIdx = 0, size = DemodBufferLen;
1703 bool invert = false;
1704 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1705 // if didn't find preamble try again inverting
1706 if (!PSKDemod("1", false)) return 0;
1707 size = DemodBufferLen;
1708 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1709 invert = true;
1710 }
1711 if (size != 128) return 0;
1712 setDemodBuf(DemodBuffer, size, startIdx+4);
1713 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1714 //get ID
1715 uint32_t ID = 0;
1716 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1717 for (uint8_t idx=0; idx<8; idx++){
1718 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1719 }
1720 }
1721 //parity check (TBD)
1722
1723 //checksum check (TBD)
1724
1725 //output
1726 PrintAndLog("NexWatch ID: %d", ID);
1727 if (invert){
1728 PrintAndLog("Had to Invert - probably NexKey");
1729 for (uint8_t idx=0; idx<size; idx++)
1730 DemodBuffer[idx] ^= 1;
1731 }
1732
1733 CmdPrintDemodBuff("x");
1734 return 1;
1735 }
1736
1737 // by marshmellow
1738 // takes 3 arguments - clock, invert, maxErr as integers
1739 // attempts to demodulate nrz only
1740 // prints binary found and saves in demodbuffer for further commands
1741 int NRZrawDemod(const char *Cmd, bool verbose)
1742 {
1743 int invert=0;
1744 int clk=0;
1745 int maxErr=100;
1746 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1747 if (clk==1){
1748 invert=1;
1749 clk=0;
1750 }
1751 if (invert != 0 && invert != 1) {
1752 PrintAndLog("Invalid argument: %s", Cmd);
1753 return 0;
1754 }
1755 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1756 size_t BitLen = getFromGraphBuf(BitStream);
1757 if (BitLen==0) return 0;
1758 int errCnt=0;
1759 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
1760 if (errCnt > maxErr){
1761 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1762 return 0;
1763 }
1764 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1765 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1766 return 0;
1767 }
1768 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1769 //prime demod buffer for output
1770 setDemodBuf(BitStream,BitLen,0);
1771
1772 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1773 if (verbose || g_debugMode) {
1774 PrintAndLog("NRZ demoded bitstream:");
1775 // Now output the bitstream to the scrollback by line of 16 bits
1776 printDemodBuff();
1777 }
1778 return 1;
1779 }
1780
1781 int CmdNRZrawDemod(const char *Cmd)
1782 {
1783 char cmdp = param_getchar(Cmd, 0);
1784 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1785 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1786 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1787 PrintAndLog(" <invert>, 1 for invert output");
1788 PrintAndLog(" [set maximum allowed errors], default = 100.");
1789 PrintAndLog("");
1790 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1791 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1792 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1793 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1794 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");
1795 return 0;
1796 }
1797 return NRZrawDemod(Cmd, TRUE);
1798 }
1799
1800 // by marshmellow
1801 // takes 3 arguments - clock, invert, maxErr as integers
1802 // attempts to demodulate psk only
1803 // prints binary found and saves in demodbuffer for further commands
1804 int CmdPSK1rawDemod(const char *Cmd)
1805 {
1806 int ans;
1807 char cmdp = param_getchar(Cmd, 0);
1808 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1809 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1810 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1811 PrintAndLog(" <invert>, 1 for invert output");
1812 PrintAndLog(" [set maximum allowed errors], default = 100.");
1813 PrintAndLog("");
1814 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1815 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1816 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1817 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1818 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");
1819 return 0;
1820 }
1821 ans = PSKDemod(Cmd, TRUE);
1822 //output
1823 if (!ans){
1824 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1825 return 0;
1826 }
1827
1828 PrintAndLog("PSK1 demoded bitstream:");
1829 // Now output the bitstream to the scrollback by line of 16 bits
1830 printDemodBuff();
1831 return 1;
1832 }
1833
1834 // by marshmellow
1835 // takes same args as cmdpsk1rawdemod
1836 int CmdPSK2rawDemod(const char *Cmd)
1837 {
1838 int ans=0;
1839 char cmdp = param_getchar(Cmd, 0);
1840 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1841 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1842 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1843 PrintAndLog(" <invert>, 1 for invert output");
1844 PrintAndLog(" [set maximum allowed errors], default = 100.");
1845 PrintAndLog("");
1846 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1847 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1848 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1849 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1850 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");
1851 return 0;
1852 }
1853 ans=PSKDemod(Cmd, TRUE);
1854 if (!ans){
1855 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1856 return 0;
1857 }
1858 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1859 PrintAndLog("PSK2 demoded bitstream:");
1860 // Now output the bitstream to the scrollback by line of 16 bits
1861 printDemodBuff();
1862 return 1;
1863 }
1864
1865 // by marshmellow - combines all raw demod functions into one menu command
1866 int CmdRawDemod(const char *Cmd)
1867 {
1868 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1869
1870 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1871 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1872 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1873 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1874 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1875 PrintAndLog(" <options> see specific modulation help for optional parameters");
1876 PrintAndLog("");
1877 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1878 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1879 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1880 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1881 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1882 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1883 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1884 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1885 return 0;
1886 }
1887 char cmdp2 = Cmd[1];
1888 int ans = 0;
1889 if (cmdp == 'f' && cmdp2 == 's'){
1890 ans = CmdFSKrawdemod(Cmd+2);
1891 } else if(cmdp == 'a' && cmdp2 == 'b'){
1892 ans = Cmdaskbiphdemod(Cmd+2);
1893 } else if(cmdp == 'a' && cmdp2 == 'm'){
1894 ans = Cmdaskmandemod(Cmd+2);
1895 } else if(cmdp == 'a' && cmdp2 == 'r'){
1896 ans = Cmdaskrawdemod(Cmd+2);
1897 } else if(cmdp == 'n' && cmdp2 == 'r'){
1898 ans = CmdNRZrawDemod(Cmd+2);
1899 } else if(cmdp == 'p' && cmdp2 == '1'){
1900 ans = CmdPSK1rawDemod(Cmd+2);
1901 } else if(cmdp == 'p' && cmdp2 == '2'){
1902 ans = CmdPSK2rawDemod(Cmd+2);
1903 } else {
1904 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1905 }
1906 return ans;
1907 }
1908
1909 int CmdGrid(const char *Cmd)
1910 {
1911 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1912 PlotGridXdefault= PlotGridX;
1913 PlotGridYdefault= PlotGridY;
1914 RepaintGraphWindow();
1915 return 0;
1916 }
1917
1918 int CmdHexsamples(const char *Cmd)
1919 {
1920 int i, j;
1921 int requested = 0;
1922 int offset = 0;
1923 char string_buf[25];
1924 char* string_ptr = string_buf;
1925 uint8_t got[BIGBUF_SIZE];
1926
1927 sscanf(Cmd, "%i %i", &requested, &offset);
1928
1929 /* if no args send something */
1930 if (requested == 0) {
1931 requested = 8;
1932 }
1933 if (offset + requested > sizeof(got)) {
1934 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1935 return 0;
1936 }
1937
1938 GetFromBigBuf(got,requested,offset);
1939 WaitForResponse(CMD_ACK,NULL);
1940
1941 i = 0;
1942 for (j = 0; j < requested; j++) {
1943 i++;
1944 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1945 if (i == 8) {
1946 *(string_ptr - 1) = '\0'; // remove the trailing space
1947 PrintAndLog("%s", string_buf);
1948 string_buf[0] = '\0';
1949 string_ptr = string_buf;
1950 i = 0;
1951 }
1952 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1953 *(string_ptr - 1) = '\0';
1954 PrintAndLog("%s", string_buf);
1955 string_buf[0] = '\0';
1956 }
1957 }
1958 return 0;
1959 }
1960
1961 int CmdHide(const char *Cmd)
1962 {
1963 HideGraphWindow();
1964 return 0;
1965 }
1966
1967 //zero mean GraphBuffer
1968 int CmdHpf(const char *Cmd)
1969 {
1970 int i;
1971 int accum = 0;
1972
1973 for (i = 10; i < GraphTraceLen; ++i)
1974 accum += GraphBuffer[i];
1975 accum /= (GraphTraceLen - 10);
1976 for (i = 0; i < GraphTraceLen; ++i)
1977 GraphBuffer[i] -= accum;
1978
1979 RepaintGraphWindow();
1980 return 0;
1981 }
1982
1983 bool _headBit( BitstreamOut *stream)
1984 {
1985 int bytepos = stream->position >> 3; // divide by 8
1986 int bitpos = (stream->position++) & 7; // mask out 00000111
1987 return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
1988 }
1989
1990 uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
1991 {
1992 int i;
1993 uint8_t val = 0;
1994 for(i =0 ; i < bits_per_sample; i++)
1995 {
1996 val |= (_headBit(b) << (7-i));
1997 }
1998 return val;
1999 }
2000
2001 int getSamples(const char *Cmd, bool silent)
2002 {
2003 //If we get all but the last byte in bigbuf,
2004 // we don't have to worry about remaining trash
2005 // in the last byte in case the bits-per-sample
2006 // does not line up on byte boundaries
2007
2008 uint8_t got[BIGBUF_SIZE-1] = { 0 };
2009
2010 int n = strtol(Cmd, NULL, 0);
2011
2012 if ( n == 0 || n > sizeof(got))
2013 n = sizeof(got);
2014
2015 PrintAndLog("Reading %d bytes from device memory\n", n);
2016 GetFromBigBuf(got,n,0);
2017 PrintAndLog("Data fetched");
2018 UsbCommand response;
2019 if ( !WaitForResponseTimeout(CMD_ACK, &response, 10000) ) {
2020 PrintAndLog("timeout while waiting for reply.");
2021 return 1;
2022 }
2023
2024 uint8_t bits_per_sample = 8;
2025
2026 //Old devices without this feature would send 0 at arg[0]
2027 if(response.arg[0] > 0)
2028 {
2029 sample_config *sc = (sample_config *) response.d.asBytes;
2030 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample, sc->decimation);
2031 bits_per_sample = sc->bits_per_sample;
2032 }
2033 if(bits_per_sample < 8)
2034 {
2035 PrintAndLog("Unpacking...");
2036 BitstreamOut bout = { got, bits_per_sample * n, 0};
2037 int j =0;
2038 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
2039 uint8_t sample = getByte(bits_per_sample, &bout);
2040 GraphBuffer[j] = ((int) sample )- 128;
2041 }
2042 GraphTraceLen = j;
2043 PrintAndLog("Unpacked %d samples" , j );
2044 }else
2045 {
2046 for (int j = 0; j < n; j++) {
2047 GraphBuffer[j] = ((int)got[j]) - 128;
2048 }
2049 GraphTraceLen = n;
2050 }
2051
2052 RepaintGraphWindow();
2053 return 0;
2054 }
2055
2056 int CmdSamples(const char *Cmd)
2057 {
2058 return getSamples(Cmd, false);
2059 }
2060
2061 int CmdTuneSamples(const char *Cmd)
2062 {
2063 int timeout = 0;
2064 printf("\nMeasuring antenna characteristics, please wait...");
2065
2066 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {0,0,0}};
2067 clearCommandBuffer();
2068 SendCommand(&c);
2069 UsbCommand resp;
2070 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING, &resp, 2000)) {
2071 timeout++;
2072 printf(".");
2073 if (timeout > 7) {
2074 PrintAndLog("\nNo response from Proxmark. Aborting...");
2075 return 1;
2076 }
2077 }
2078
2079 int peakv, peakf;
2080 int vLf125, vLf134, vHf;
2081 vLf125 = resp.arg[0] & 0xffff;
2082 vLf134 = resp.arg[0] >> 16;
2083 vHf = resp.arg[1] & 0xffff;;
2084 peakf = resp.arg[2] & 0xffff;
2085 peakv = resp.arg[2] >> 16;
2086 PrintAndLog("");
2087 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
2088 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
2089 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
2090 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
2091
2092 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
2093 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
2094 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2095 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2096
2097 if (peakv < LF_UNUSABLE_V)
2098 PrintAndLog("# Your LF antenna is unusable.");
2099 else if (peakv < LF_MARGINAL_V)
2100 PrintAndLog("# Your LF antenna is marginal.");
2101 if (vHf < HF_UNUSABLE_V)
2102 PrintAndLog("# Your HF antenna is unusable.");
2103 else if (vHf < HF_MARGINAL_V)
2104 PrintAndLog("# Your HF antenna is marginal.");
2105
2106 if (peakv >= LF_UNUSABLE_V) {
2107 for (int i = 0; i < 256; i++) {
2108 GraphBuffer[i] = resp.d.asBytes[i] - 128;
2109 }
2110 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
2111 PrintAndLog("\n");
2112 GraphTraceLen = 256;
2113 ShowGraphWindow();
2114 RepaintGraphWindow();
2115 }
2116 return 0;
2117 }
2118
2119
2120 int CmdLoad(const char *Cmd)
2121 {
2122 char filename[FILE_PATH_SIZE] = {0x00};
2123 int len = 0;
2124
2125 len = strlen(Cmd);
2126 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2127 memcpy(filename, Cmd, len);
2128
2129 FILE *f = fopen(filename, "r");
2130 if (!f) {
2131 PrintAndLog("couldn't open '%s'", filename);
2132 return 0;
2133 }
2134
2135 GraphTraceLen = 0;
2136 char line[80];
2137 while (fgets(line, sizeof (line), f)) {
2138 GraphBuffer[GraphTraceLen] = atoi(line);
2139 GraphTraceLen++;
2140 }
2141 fclose(f);
2142 PrintAndLog("loaded %d samples", GraphTraceLen);
2143 RepaintGraphWindow();
2144 return 0;
2145 }
2146
2147 int CmdLtrim(const char *Cmd)
2148 {
2149 int ds = atoi(Cmd);
2150
2151 if (GraphTraceLen <= 0) return 0;
2152
2153 for (int i = ds; i < GraphTraceLen; ++i)
2154 GraphBuffer[i-ds] = GraphBuffer[i];
2155
2156 GraphTraceLen -= ds;
2157 RepaintGraphWindow();
2158 return 0;
2159 }
2160
2161 // trim graph to input argument length
2162 int CmdRtrim(const char *Cmd)
2163 {
2164 int ds = atoi(Cmd);
2165 GraphTraceLen = ds;
2166 RepaintGraphWindow();
2167 return 0;
2168 }
2169
2170 int CmdNorm(const char *Cmd)
2171 {
2172 int i;
2173 int max = INT_MIN, min = INT_MAX;
2174
2175 for (i = 10; i < GraphTraceLen; ++i) {
2176 if (GraphBuffer[i] > max)
2177 max = GraphBuffer[i];
2178 if (GraphBuffer[i] < min)
2179 min = GraphBuffer[i];
2180 }
2181
2182 if (max != min) {
2183 for (i = 0; i < GraphTraceLen; ++i) {
2184 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
2185 (max - min);
2186 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
2187 }
2188 }
2189 RepaintGraphWindow();
2190 return 0;
2191 }
2192
2193 int CmdPlot(const char *Cmd)
2194 {
2195 ShowGraphWindow();
2196 return 0;
2197 }
2198
2199 int CmdSave(const char *Cmd)
2200 {
2201 char filename[FILE_PATH_SIZE] = {0x00};
2202 int len = 0;
2203
2204 len = strlen(Cmd);
2205 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2206 memcpy(filename, Cmd, len);
2207
2208
2209 FILE *f = fopen(filename, "w");
2210 if(!f) {
2211 PrintAndLog("couldn't open '%s'", filename);
2212 return 0;
2213 }
2214 int i;
2215 for (i = 0; i < GraphTraceLen; i++) {
2216 fprintf(f, "%d\n", GraphBuffer[i]);
2217 }
2218 fclose(f);
2219 PrintAndLog("saved to '%s'", Cmd);
2220 return 0;
2221 }
2222
2223 int CmdScale(const char *Cmd)
2224 {
2225 CursorScaleFactor = atoi(Cmd);
2226 if (CursorScaleFactor == 0) {
2227 PrintAndLog("bad, can't have zero scale");
2228 CursorScaleFactor = 1;
2229 }
2230 RepaintGraphWindow();
2231 return 0;
2232 }
2233
2234 int CmdDirectionalThreshold(const char *Cmd)
2235 {
2236 int8_t upThres = param_get8(Cmd, 0);
2237 int8_t downThres = param_get8(Cmd, 1);
2238
2239 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
2240
2241 int lastValue = GraphBuffer[0];
2242 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
2243
2244 for (int i = 1; i < GraphTraceLen; ++i) {
2245 // Apply first threshold to samples heading up
2246 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2247 {
2248 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2249 GraphBuffer[i] = 1;
2250 }
2251 // Apply second threshold to samples heading down
2252 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2253 {
2254 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2255 GraphBuffer[i] = -1;
2256 }
2257 else
2258 {
2259 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2260 GraphBuffer[i] = GraphBuffer[i-1];
2261
2262 }
2263 }
2264 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2265 RepaintGraphWindow();
2266 return 0;
2267 }
2268
2269 int CmdZerocrossings(const char *Cmd)
2270 {
2271 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2272 CmdHpf("");
2273
2274 int sign = 1;
2275 int zc = 0;
2276 int lastZc = 0;
2277
2278 for (int i = 0; i < GraphTraceLen; ++i) {
2279 if (GraphBuffer[i] * sign >= 0) {
2280 // No change in sign, reproduce the previous sample count.
2281 zc++;
2282 GraphBuffer[i] = lastZc;
2283 } else {
2284 // Change in sign, reset the sample count.
2285 sign = -sign;
2286 GraphBuffer[i] = lastZc;
2287 if (sign > 0) {
2288 lastZc = zc;
2289 zc = 0;
2290 }
2291 }
2292 }
2293
2294 RepaintGraphWindow();
2295 return 0;
2296 }
2297
2298 int usage_data_bin2hex(){
2299 PrintAndLog("Usage: data bin2hex <binary_digits>");
2300 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
2301 return 0;
2302 }
2303
2304 /**
2305 * @brief Utility for conversion via cmdline.
2306 * @param Cmd
2307 * @return
2308 */
2309 int Cmdbin2hex(const char *Cmd)
2310 {
2311 int bg =0, en =0;
2312 if(param_getptr(Cmd, &bg, &en, 0))
2313 {
2314 return usage_data_bin2hex();
2315 }
2316 //Number of digits supplied as argument
2317 size_t length = en - bg +1;
2318 size_t bytelen = (length+7) / 8;
2319 uint8_t* arr = (uint8_t *) malloc(bytelen);
2320 memset(arr, 0, bytelen);
2321 BitstreamOut bout = { arr, 0, 0 };
2322
2323 for(; bg <= en ;bg++)
2324 {
2325 char c = Cmd[bg];
2326 if( c == '1') pushBit(&bout, 1);
2327 else if( c == '0') pushBit(&bout, 0);
2328 else PrintAndLog("Ignoring '%c'", c);
2329 }
2330
2331 if(bout.numbits % 8 != 0)
2332 {
2333 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
2334 }
2335
2336 //Uses printf instead of PrintAndLog since the latter
2337 // adds linebreaks to each printout - this way was more convenient since we don't have to
2338 // allocate a string and write to that first...
2339 for(size_t x = 0; x < bytelen ; x++)
2340 {
2341 printf("%02X", arr[x]);
2342 }
2343 printf("\n");
2344 free(arr);
2345 return 0;
2346 }
2347
2348 int usage_data_hex2bin(){
2349 PrintAndLog("Usage: data hex2bin <hex_digits>");
2350 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
2351 return 0;
2352 }
2353
2354 int Cmdhex2bin(const char *Cmd)
2355 {
2356 int bg =0, en =0;
2357 if(param_getptr(Cmd, &bg, &en, 0)) return usage_data_hex2bin();
2358
2359 while(bg <= en )
2360 {
2361 char x = Cmd[bg++];
2362 // capitalize
2363 if (x >= 'a' && x <= 'f')
2364 x -= 32;
2365 // convert to numeric value
2366 if (x >= '0' && x <= '9')
2367 x -= '0';
2368 else if (x >= 'A' && x <= 'F')
2369 x -= 'A' - 10;
2370 else
2371 continue;
2372
2373 //Uses printf instead of PrintAndLog since the latter
2374 // adds linebreaks to each printout - this way was more convenient since we don't have to
2375 // allocate a string and write to that first...
2376
2377 for(int i= 0 ; i < 4 ; ++i)
2378 printf("%d",(x >> (3 - i)) & 1);
2379 }
2380 printf("\n");
2381
2382 return 0;
2383 }
2384
2385 static command_t CommandTable[] =
2386 {
2387 {"help", CmdHelp, 1, "This help"},
2388 {"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)"},
2389 {"askem410xdemod", CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
2390 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
2391 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking AM tag from GraphBuffer"},
2392 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
2393 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
2394 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
2395 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
2396 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2397 {"dec", CmdDec, 1, "Decimate samples"},
2398 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
2399 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
2400 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
2401 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
2402 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2403 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2404 {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2405 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
2406 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
2407 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
2408 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
2409 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
2410 {"hide", CmdHide, 1, "Hide graph window"},
2411 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
2412 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2413 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
2414 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
2415 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
2416 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
2417 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
2418 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
2419 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
2420 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
2421 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2422 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
2423 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2424 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
2425 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
2426 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
2427 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2428 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
2429 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
2430 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
2431 {NULL, NULL, 0, NULL}
2432 };
2433
2434 int CmdData(const char *Cmd){
2435 clearCommandBuffer();
2436 CmdsParse(CommandTable, Cmd);
2437 return 0;
2438 }
2439
2440 int CmdHelp(const char *Cmd)
2441 {
2442 CmdsHelp(CommandTable);
2443 return 0;
2444 }
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