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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> // also included in util.h
12 #include <string.h> // also included in util.h
13 #include <inttypes.h>
14 #include <limits.h> // for CmdNorm INT_MIN && INT_MAX
15 #include "data.h" // also included in util.h
16 #include "cmddata.h"
17 #include "util.h"
18 #include "cmdmain.h"
19 #include "proxmark3.h"
20 #include "ui.h" // for show graph controls
21 #include "graph.h" // for graph data
22 #include "cmdparser.h"// already included in cmdmain.h
23 #include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
24 #include "lfdemod.h" // for demod code
25 #include "loclass/cipherutils.h" // for decimating samples in getsamples
26 #include "cmdlfem4x.h"// for em410x demod
27
28 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
29 uint8_t g_debugMode=0;
30 size_t DemodBufferLen=0;
31 int g_DemodStartIdx=0;
32 int g_DemodClock=0;
33
34 static int CmdHelp(const char *Cmd);
35
36 //set the demod buffer with given array of binary (one bit per byte)
37 //by marshmellow
38 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
39 {
40 if (buff == NULL)
41 return;
42
43 if ( size > MAX_DEMOD_BUF_LEN - startIdx)
44 size = MAX_DEMOD_BUF_LEN - startIdx;
45
46 size_t i = 0;
47 for (; i < size; i++){
48 DemodBuffer[i]=buff[startIdx++];
49 }
50 DemodBufferLen=size;
51 return;
52 }
53
54 bool getDemodBuf(uint8_t *buff, size_t *size) {
55 if (buff == NULL) return false;
56 if (size == NULL) return false;
57 if (*size == 0) return false;
58
59 *size = (*size > DemodBufferLen) ? DemodBufferLen : *size;
60
61 memcpy(buff, DemodBuffer, *size);
62 return true;
63 }
64
65 // option '1' to save DemodBuffer any other to restore
66 void save_restoreDB(uint8_t saveOpt)
67 {
68 static uint8_t SavedDB[MAX_DEMOD_BUF_LEN];
69 static size_t SavedDBlen;
70 static bool DB_Saved = false;
71
72 if (saveOpt==1) { //save
73
74 memcpy(SavedDB, DemodBuffer, sizeof(DemodBuffer));
75 SavedDBlen = DemodBufferLen;
76 DB_Saved=true;
77 } else if (DB_Saved) { //restore
78 memcpy(DemodBuffer, SavedDB, sizeof(DemodBuffer));
79 DemodBufferLen = SavedDBlen;
80 }
81 return;
82 }
83
84 int CmdSetDebugMode(const char *Cmd)
85 {
86 int demod=0;
87 sscanf(Cmd, "%i", &demod);
88 g_debugMode=(uint8_t)demod;
89 return 1;
90 }
91
92 int usage_data_printdemodbuf(){
93 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
94 PrintAndLog("Options: ");
95 PrintAndLog(" h This help");
96 PrintAndLog(" x output in hex (omit for binary output)");
97 PrintAndLog(" o <offset> enter offset in # of bits");
98 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
99 return 0;
100 }
101
102 //by marshmellow
103 void printDemodBuff(void)
104 {
105 int bitLen = DemodBufferLen;
106 if (bitLen<1) {
107 PrintAndLog("no bits found in demod buffer");
108 return;
109 }
110 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
111
112 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
113 PrintAndLog("%s",bin);
114
115 return;
116 }
117
118 int CmdPrintDemodBuff(const char *Cmd)
119 {
120 char hex[512]={0x00};
121 bool hexMode = false;
122 bool errors = false;
123 uint32_t offset = 0; //could be size_t but no param_get16...
124 uint32_t length = 512;
125 char cmdp = 0;
126 while(param_getchar(Cmd, cmdp) != 0x00)
127 {
128 switch(param_getchar(Cmd, cmdp))
129 {
130 case 'h':
131 case 'H':
132 return usage_data_printdemodbuf();
133 case 'x':
134 case 'X':
135 hexMode = true;
136 cmdp++;
137 break;
138 case 'o':
139 case 'O':
140 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
141 if (!offset) errors = true;
142 cmdp += 2;
143 break;
144 case 'l':
145 case 'L':
146 length = param_get32ex(Cmd, cmdp+1, 512, 10);
147 if (!length) errors = true;
148 cmdp += 2;
149 break;
150 default:
151 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
152 errors = true;
153 break;
154 }
155 if(errors) break;
156 }
157 //Validations
158 if(errors) return usage_data_printdemodbuf();
159 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
160 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
161
162 if (hexMode){
163 char *buf = (char *) (DemodBuffer + offset);
164 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
165 numBits = binarraytohex(hex, buf, numBits);
166 if (numBits==0) return 0;
167 PrintAndLog("DemodBuffer: %s",hex);
168 } else {
169 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
170 }
171 return 1;
172 }
173
174 //by marshmellow
175 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
176 int CmdGetBitStream(const char *Cmd)
177 {
178 int i;
179 CmdHpf(Cmd);
180 for (i = 0; i < GraphTraceLen; i++) {
181 if (GraphBuffer[i] >= 1) {
182 GraphBuffer[i] = 1;
183 } else {
184 GraphBuffer[i] = 0;
185 }
186 }
187 RepaintGraphWindow();
188 return 0;
189 }
190
191 //by marshmellow
192 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
193 // (amp may not be needed anymore)
194 //verbose will print results and demoding messages
195 //emSearch will auto search for EM410x format in bitstream
196 //askType switches decode: ask/raw = 0, ask/manchester = 1
197 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
198 int invert=0;
199 int clk=0;
200 int maxErr=100;
201 int maxLen=0;
202 uint8_t askamp = 0;
203 char amp = param_getchar(Cmd, 0);
204 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
205 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
206 if (!maxLen) maxLen = BIGBUF_SIZE;
207 if (invert != 0 && invert != 1) {
208 PrintAndLog("Invalid argument: %s", Cmd);
209 return 0;
210 }
211 if (clk==1){
212 invert=1;
213 clk=0;
214 }
215 size_t BitLen = getFromGraphBuf(BitStream);
216 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
217 if (BitLen < 255) return 0;
218 if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
219 int foundclk = 0;
220 //amp before ST check
221 if (amp == 'a' || amp == 'A') {
222 askAmp(BitStream, BitLen);
223 }
224 bool st = false;
225 size_t ststart = 0, stend = 0;
226 if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk, &ststart, &stend);
227 *stCheck = st;
228 if (st) {
229 clk = (clk == 0) ? foundclk : clk;
230 CursorCPos = ststart;
231 CursorDPos = stend;
232 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
233 //Graph ST trim (for testing)
234 //for (int i = 0; i < BitLen; i++) {
235 // GraphBuffer[i] = BitStream[i]-128;
236 //}
237 //RepaintGraphWindow();
238 }
239 int startIdx = 0;
240 int errCnt = askdemod_ext(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType, &startIdx);
241 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
242 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
243 return 0;
244 }
245 if (errCnt > maxErr){
246 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
247 return 0;
248 }
249 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
250 //output
251 setDemodBuf(BitStream,BitLen,0);
252 setClockGrid(clk, startIdx);
253
254 if (verbose || g_debugMode){
255 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
256 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
257 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
258 // Now output the bitstream to the scrollback by line of 16 bits
259 printDemodBuff();
260
261 }
262 uint64_t lo = 0;
263 uint32_t hi = 0;
264 if (emSearch){
265 AskEm410xDecode(true, &hi, &lo);
266 }
267 return 1;
268 }
269 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
270 bool st = false;
271 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
272 }
273
274 //by marshmellow
275 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
276 //attempts to demodulate ask while decoding manchester
277 //prints binary found and saves in graphbuffer for further commands
278 int Cmdaskmandemod(const char *Cmd)
279 {
280 char cmdp = param_getchar(Cmd, 0);
281 if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
282 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
283 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
284 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
285 PrintAndLog(" <invert>, 1 to invert output");
286 PrintAndLog(" [set maximum allowed errors], default = 100");
287 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
288 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
289 PrintAndLog("");
290 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
291 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
292 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
293 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
294 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");
295 return 0;
296 }
297 bool st = true;
298 if (Cmd[0]=='s')
299 return ASKDemod_ext(Cmd++, true, false, 1, &st);
300 else if (Cmd[1] == 's')
301 return ASKDemod_ext(Cmd+=2, true, false, 1, &st);
302 else
303 return ASKDemod(Cmd, true, false, 1);
304 }
305
306 //by marshmellow
307 //manchester decode
308 //stricktly take 10 and 01 and convert to 0 and 1
309 int Cmdmandecoderaw(const char *Cmd)
310 {
311 int i =0;
312 int errCnt=0;
313 size_t size=0;
314 int invert=0;
315 int maxErr = 20;
316 char cmdp = param_getchar(Cmd, 0);
317 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
318 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
319 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
320 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
321 PrintAndLog(" [invert] invert output");
322 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
323 PrintAndLog("");
324 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
325 return 0;
326 }
327 if (DemodBufferLen==0) return 0;
328 uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
329 int high=0,low=0;
330 for (;i<DemodBufferLen;++i){
331 if (DemodBuffer[i]>high) high=DemodBuffer[i];
332 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
333 BitStream[i]=DemodBuffer[i];
334 }
335 if (high>7 || low <0 ){
336 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
337 return 0;
338 }
339
340 sscanf(Cmd, "%i %i", &invert, &maxErr);
341 size=i;
342 uint8_t alignPos = 0;
343 errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
344 if (errCnt>=maxErr){
345 PrintAndLog("Too many errors: %d",errCnt);
346 return 0;
347 }
348 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
349 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
350 if (errCnt==0){
351 uint64_t id = 0;
352 uint32_t hi = 0;
353 size_t idx=0;
354 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
355 //need to adjust to set bitstream back to manchester encoded data
356 //setDemodBuf(BitStream, size, idx);
357
358 printEM410x(hi, id);
359 }
360 }
361 return 1;
362 }
363
364 //by marshmellow
365 //biphase decode
366 //take 01 or 10 = 0 and 11 or 00 = 1
367 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
368 // and "invert" default = 0 if 1 it will invert output
369 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
370 int CmdBiphaseDecodeRaw(const char *Cmd)
371 {
372 size_t size=0;
373 int offset=0, invert=0, maxErr=20, errCnt=0;
374 char cmdp = param_getchar(Cmd, 0);
375 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
376 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
377 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
378 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
379 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
380 PrintAndLog("");
381 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
382 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
383 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
384 PrintAndLog("");
385 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
386 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
387 return 0;
388 }
389 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
390 if (DemodBufferLen==0) {
391 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
392 return 0;
393 }
394 uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
395 size = sizeof(BitStream);
396 if ( !getDemodBuf(BitStream, &size) ) return 0;
397 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
398 if (errCnt<0){
399 PrintAndLog("Error during decode:%d", errCnt);
400 return 0;
401 }
402 if (errCnt>maxErr){
403 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
404 return 0;
405 }
406
407 if (errCnt>0){
408 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
409 }
410 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
411 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
412
413 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
414 return 1;
415 }
416
417 //by marshmellow
418 // - ASK Demod then Biphase decode GraphBuffer samples
419 int ASKbiphaseDemod(const char *Cmd, bool verbose)
420 {
421 //ask raw demod GraphBuffer first
422 int offset=0, clk=0, invert=0, maxErr=0;
423 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
424
425 uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
426 size_t size = getFromGraphBuf(BitStream);
427 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
428 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
429 if ( errCnt < 0 || errCnt > maxErr ) {
430 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
431 return 0;
432 }
433
434 //attempt to Biphase decode BitStream
435 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
436 if (errCnt < 0){
437 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
438 return 0;
439 }
440 if (errCnt > maxErr) {
441 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
442 return 0;
443 }
444 //success set DemodBuffer and return
445 setDemodBuf(BitStream, size, 0);
446 if (g_debugMode || verbose){
447 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
448 printDemodBuff();
449 }
450 return 1;
451 }
452 //by marshmellow - see ASKbiphaseDemod
453 int Cmdaskbiphdemod(const char *Cmd)
454 {
455 char cmdp = param_getchar(Cmd, 0);
456 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
457 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
458 PrintAndLog(" [offset], offset to begin biphase, default=0");
459 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
460 PrintAndLog(" <invert>, 1 to invert output");
461 PrintAndLog(" [set maximum allowed errors], default = 100");
462 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
463 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
464 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
465 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
466 PrintAndLog(" NOTE: any other arg must have previous args set to work");
467 PrintAndLog("");
468 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
469 PrintAndLog("");
470 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
471 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
472 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
473 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
474 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
475 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");
476 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");
477 return 0;
478 }
479 return ASKbiphaseDemod(Cmd, true);
480 }
481
482 //by marshmellow - see ASKDemod
483 int Cmdaskrawdemod(const char *Cmd)
484 {
485 char cmdp = param_getchar(Cmd, 0);
486 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
487 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
488 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
489 PrintAndLog(" <invert>, 1 to invert output");
490 PrintAndLog(" [set maximum allowed errors], default = 100");
491 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
492 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
493 PrintAndLog("");
494 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
495 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
496 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
497 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
498 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
499 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");
500 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");
501 return 0;
502 }
503 return ASKDemod(Cmd, true, false, 0);
504 }
505
506 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
507 {
508 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
509 size_t Correlation = 0;
510 int maxSum = 0;
511 int lastMax = 0;
512 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
513 for (int i = 0; i < GraphTraceLen - window; ++i) {
514 int sum = 0;
515 for (int j = 0; j < window; ++j) {
516 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
517 }
518 CorrelBuffer[i] = sum;
519 if (sum >= maxSum-100 && sum <= maxSum+100){
520 //another max
521 Correlation = i-lastMax;
522 lastMax = i;
523 if (sum > maxSum) maxSum = sum;
524 } else if (sum > maxSum){
525 maxSum=sum;
526 lastMax = i;
527 }
528 }
529 if (Correlation==0){
530 //try again with wider margin
531 for (int i = 0; i < GraphTraceLen - window; i++){
532 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
533 //another max
534 Correlation = i-lastMax;
535 lastMax = i;
536 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
537 }
538 }
539 }
540 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
541
542 if (SaveGrph){
543 GraphTraceLen = GraphTraceLen - window;
544 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
545 RepaintGraphWindow();
546 }
547 return Correlation;
548 }
549
550 int usage_data_autocorr(void)
551 {
552 //print help
553 PrintAndLog("Usage: data autocorr [window] [g]");
554 PrintAndLog("Options: ");
555 PrintAndLog(" h This help");
556 PrintAndLog(" [window] window length for correlation - default = 4000");
557 PrintAndLog(" g save back to GraphBuffer (overwrite)");
558 return 0;
559 }
560
561 int CmdAutoCorr(const char *Cmd)
562 {
563 char cmdp = param_getchar(Cmd, 0);
564 if (cmdp == 'h' || cmdp == 'H')
565 return usage_data_autocorr();
566 int window = 4000; //set default
567 char grph=0;
568 bool updateGrph = false;
569 sscanf(Cmd, "%i %c", &window, &grph);
570
571 if (window >= GraphTraceLen) {
572 PrintAndLog("window must be smaller than trace (%d samples)",
573 GraphTraceLen);
574 return 0;
575 }
576 if (grph == 'g') updateGrph=true;
577 return AutoCorrelate(window, updateGrph, true);
578 }
579
580 int CmdBitsamples(const char *Cmd)
581 {
582 int cnt = 0;
583 uint8_t got[12288];
584
585 GetFromBigBuf(got,sizeof(got),0);
586 WaitForResponse(CMD_ACK,NULL);
587
588 for (int j = 0; j < sizeof(got); j++) {
589 for (int k = 0; k < 8; k++) {
590 if(got[j] & (1 << (7 - k))) {
591 GraphBuffer[cnt++] = 1;
592 } else {
593 GraphBuffer[cnt++] = 0;
594 }
595 }
596 }
597 GraphTraceLen = cnt;
598 RepaintGraphWindow();
599 return 0;
600 }
601
602 int CmdBuffClear(const char *Cmd)
603 {
604 UsbCommand c = {CMD_BUFF_CLEAR};
605 SendCommand(&c);
606 ClearGraph(true);
607 return 0;
608 }
609
610 int CmdDec(const char *Cmd)
611 {
612 for (int i = 0; i < (GraphTraceLen / 2); ++i)
613 GraphBuffer[i] = GraphBuffer[i * 2];
614 GraphTraceLen /= 2;
615 PrintAndLog("decimated by 2");
616 RepaintGraphWindow();
617 return 0;
618 }
619 /**
620 * Undecimate - I'd call it 'interpolate', but we'll save that
621 * name until someone does an actual interpolation command, not just
622 * blindly repeating samples
623 * @param Cmd
624 * @return
625 */
626 int CmdUndec(const char *Cmd)
627 {
628 if(param_getchar(Cmd, 0) == 'h')
629 {
630 PrintAndLog("Usage: data undec [factor]");
631 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
632 PrintAndLog("Options: ");
633 PrintAndLog(" h This help");
634 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
635 PrintAndLog("Example: 'data undec 3'");
636 return 0;
637 }
638
639 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
640 //We have memory, don't we?
641 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
642 uint32_t g_index = 0, s_index = 0;
643 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
644 {
645 int count = 0;
646 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
647 swap[s_index+count] = GraphBuffer[g_index];
648
649 s_index += count;
650 g_index++;
651 }
652
653 memcpy(GraphBuffer, swap, s_index * sizeof(int));
654 GraphTraceLen = s_index;
655 RepaintGraphWindow();
656 return 0;
657 }
658
659 //by marshmellow
660 //shift graph zero up or down based on input + or -
661 int CmdGraphShiftZero(const char *Cmd)
662 {
663
664 int shift=0;
665 //set options from parameters entered with the command
666 sscanf(Cmd, "%i", &shift);
667 int shiftedVal=0;
668 for(int i = 0; i<GraphTraceLen; i++){
669 shiftedVal=GraphBuffer[i]+shift;
670 if (shiftedVal>127)
671 shiftedVal=127;
672 else if (shiftedVal<-127)
673 shiftedVal=-127;
674 GraphBuffer[i]= shiftedVal;
675 }
676 CmdNorm("");
677 return 0;
678 }
679
680 //by marshmellow
681 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
682 //similar to dirtheshold, threshold commands
683 //takes a threshold length which is the measured length between two samples then determines an edge
684 int CmdAskEdgeDetect(const char *Cmd)
685 {
686 int thresLen = 25;
687 int Last = 0;
688 sscanf(Cmd, "%i", &thresLen);
689
690 for(int i = 1; i<GraphTraceLen; i++){
691 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
692 Last = 127;
693 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
694 Last = -127;
695 GraphBuffer[i-1] = Last;
696 }
697 RepaintGraphWindow();
698 return 0;
699 }
700
701 /* Print our clock rate */
702 // uses data from graphbuffer
703 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
704 int CmdDetectClockRate(const char *Cmd)
705 {
706 char cmdp = param_getchar(Cmd, 0);
707 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
708 PrintAndLog("Usage: data detectclock [modulation] <clock>");
709 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
710 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
711 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
712 PrintAndLog("");
713 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
714 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
715 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
716 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
717 }
718 int ans=0;
719 if (cmdp == 'a'){
720 ans = GetAskClock(Cmd+1, true, false);
721 } else if (cmdp == 'f'){
722 ans = GetFskClock("", true, false);
723 } else if (cmdp == 'n'){
724 ans = GetNrzClock("", true, false);
725 } else if (cmdp == 'p'){
726 ans = GetPskClock("", true, false);
727 } else {
728 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
729 }
730 return ans;
731 }
732
733 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
734 {
735 static char fType[8];
736 memset(fType, 0x00, 8);
737 char *fskType = fType;
738 if (fchigh==10 && fclow==8){
739 if (invert) //fsk2a
740 memcpy(fskType, "FSK2a", 5);
741 else //fsk2
742 memcpy(fskType, "FSK2", 4);
743 } else if (fchigh == 8 && fclow == 5) {
744 if (invert)
745 memcpy(fskType, "FSK1", 4);
746 else
747 memcpy(fskType, "FSK1a", 5);
748 } else {
749 memcpy(fskType, "FSK??", 5);
750 }
751 return fskType;
752 }
753
754 //by marshmellow
755 //fsk raw demod and print binary
756 //takes 4 arguments - Clock, invert, fchigh, fclow
757 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
758 int FSKrawDemod(const char *Cmd, bool verbose)
759 {
760 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
761 uint8_t rfLen, invert, fchigh, fclow;
762 //set defaults
763 //set options from parameters entered with the command
764 rfLen = param_get8(Cmd, 0);
765 invert = param_get8(Cmd, 1);
766 fchigh = param_get8(Cmd, 2);
767 fclow = param_get8(Cmd, 3);
768
769 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
770 if (rfLen==1) {
771 invert = 1; //if invert option only is used
772 rfLen = 0;
773 }
774 }
775 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
776 size_t BitLen = getFromGraphBuf(BitStream);
777 if (BitLen==0) return 0;
778 //get field clock lengths
779 uint16_t fcs=0;
780 if (!fchigh || !fclow) {
781 fcs = countFC(BitStream, BitLen, 1);
782 if (!fcs) {
783 fchigh = 10;
784 fclow = 8;
785 } else {
786 fchigh = (fcs >> 8) & 0x00FF;
787 fclow = fcs & 0x00FF;
788 }
789 }
790 //get bit clock length
791 if (!rfLen) {
792 int firstClockEdge = 0; //todo - align grid on graph with this...
793 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge);
794 if (!rfLen) rfLen = 50;
795 }
796 int startIdx = 0;
797 int size = fskdemod_ext(BitStream, BitLen, rfLen, invert, fchigh, fclow, &startIdx);
798 if (size > 0) {
799 setDemodBuf(BitStream,size,0);
800 setClockGrid(rfLen, startIdx);
801
802 // Now output the bitstream to the scrollback by line of 16 bits
803 if (verbose || g_debugMode) {
804 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
805 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
806 printDemodBuff();
807 }
808
809 return 1;
810 } else {
811 if (g_debugMode) PrintAndLog("no FSK data found");
812 }
813 return 0;
814 }
815
816 //by marshmellow
817 //fsk raw demod and print binary
818 //takes 4 arguments - Clock, invert, fchigh, fclow
819 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
820 int CmdFSKrawdemod(const char *Cmd)
821 {
822 char cmdp = param_getchar(Cmd, 0);
823 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
824 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
825 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
826 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
827 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
828 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
829 PrintAndLog("");
830 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
831 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
832 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
833 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
834 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
835 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
836 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
837 return 0;
838 }
839 return FSKrawDemod(Cmd, true);
840 }
841
842 //by marshmellow
843 //attempt to psk1 demod graph buffer
844 int PSKDemod(const char *Cmd, bool verbose)
845 {
846 int invert=0;
847 int clk=0;
848 int maxErr=100;
849 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
850 if (clk==1){
851 invert=1;
852 clk=0;
853 }
854 if (invert != 0 && invert != 1) {
855 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
856 return 0;
857 }
858 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
859 size_t BitLen = getFromGraphBuf(BitStream);
860 if (BitLen==0) return 0;
861 int errCnt=0;
862 int startIdx = 0;
863 errCnt = pskRawDemod_ext(BitStream, &BitLen, &clk, &invert, &startIdx);
864 if (errCnt > maxErr){
865 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
866 return 0;
867 }
868 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
869 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
870 return 0;
871 }
872 if (verbose || g_debugMode){
873 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
874 if (errCnt>0){
875 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
876 }
877 }
878 //prime demod buffer for output
879 setDemodBuf(BitStream,BitLen,0);
880 setClockGrid(clk, startIdx);
881
882 return 1;
883 }
884
885 // by marshmellow
886 // takes 3 arguments - clock, invert, maxErr as integers
887 // attempts to demodulate nrz only
888 // prints binary found and saves in demodbuffer for further commands
889 int NRZrawDemod(const char *Cmd, bool verbose)
890 {
891 int invert=0;
892 int clk=0;
893 int maxErr=100;
894 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
895 if (clk==1){
896 invert=1;
897 clk=0;
898 }
899 if (invert != 0 && invert != 1) {
900 PrintAndLog("Invalid argument: %s", Cmd);
901 return 0;
902 }
903 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
904 size_t BitLen = getFromGraphBuf(BitStream);
905 if (BitLen==0) return 0;
906 int errCnt=0;
907 int clkStartIdx = 0;
908 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
909 if (errCnt > maxErr){
910 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
911 return 0;
912 }
913 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
914 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
915 return 0;
916 }
917 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
918 //prime demod buffer for output
919 setDemodBuf(BitStream,BitLen,0);
920 setClockGrid(clk, clkStartIdx);
921
922
923 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
924 if (verbose || g_debugMode) {
925 PrintAndLog("NRZ demoded bitstream:");
926 // Now output the bitstream to the scrollback by line of 16 bits
927 printDemodBuff();
928 }
929 return 1;
930 }
931
932 int CmdNRZrawDemod(const char *Cmd)
933 {
934 char cmdp = param_getchar(Cmd, 0);
935 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
936 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
937 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
938 PrintAndLog(" <invert>, 1 for invert output");
939 PrintAndLog(" [set maximum allowed errors], default = 100.");
940 PrintAndLog("");
941 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
942 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
943 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
944 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
945 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");
946 return 0;
947 }
948 return NRZrawDemod(Cmd, true);
949 }
950
951 // by marshmellow
952 // takes 3 arguments - clock, invert, maxErr as integers
953 // attempts to demodulate psk only
954 // prints binary found and saves in demodbuffer for further commands
955 int CmdPSK1rawDemod(const char *Cmd)
956 {
957 int ans;
958 char cmdp = param_getchar(Cmd, 0);
959 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
960 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
961 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
962 PrintAndLog(" <invert>, 1 for invert output");
963 PrintAndLog(" [set maximum allowed errors], default = 100.");
964 PrintAndLog("");
965 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
966 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
967 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
968 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
969 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");
970 return 0;
971 }
972 ans = PSKDemod(Cmd, true);
973 //output
974 if (!ans){
975 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
976 return 0;
977 }
978
979 PrintAndLog("PSK1 demoded bitstream:");
980 // Now output the bitstream to the scrollback by line of 16 bits
981 printDemodBuff();
982 return 1;
983 }
984
985 // by marshmellow
986 // takes same args as cmdpsk1rawdemod
987 int CmdPSK2rawDemod(const char *Cmd)
988 {
989 int ans=0;
990 char cmdp = param_getchar(Cmd, 0);
991 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
992 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
993 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
994 PrintAndLog(" <invert>, 1 for invert output");
995 PrintAndLog(" [set maximum allowed errors], default = 100.");
996 PrintAndLog("");
997 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
998 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
999 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1000 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1001 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");
1002 return 0;
1003 }
1004 ans=PSKDemod(Cmd, true);
1005 if (!ans){
1006 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1007 return 0;
1008 }
1009 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1010 PrintAndLog("PSK2 demoded bitstream:");
1011 // Now output the bitstream to the scrollback by line of 16 bits
1012 printDemodBuff();
1013 return 1;
1014 }
1015
1016 // by marshmellow - combines all raw demod functions into one menu command
1017 int CmdRawDemod(const char *Cmd)
1018 {
1019 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1020
1021 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1022 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1023 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1024 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1025 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1026 PrintAndLog(" <options> see specific modulation help for optional parameters");
1027 PrintAndLog("");
1028 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1029 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1030 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1031 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1032 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1033 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1034 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1035 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1036 return 0;
1037 }
1038 char cmdp2 = Cmd[1];
1039 int ans = 0;
1040 if (cmdp == 'f' && cmdp2 == 's'){
1041 ans = CmdFSKrawdemod(Cmd+2);
1042 } else if(cmdp == 'a' && cmdp2 == 'b'){
1043 ans = Cmdaskbiphdemod(Cmd+2);
1044 } else if(cmdp == 'a' && cmdp2 == 'm'){
1045 ans = Cmdaskmandemod(Cmd+2);
1046 } else if(cmdp == 'a' && cmdp2 == 'r'){
1047 ans = Cmdaskrawdemod(Cmd+2);
1048 } else if(cmdp == 'n' && cmdp2 == 'r'){
1049 ans = CmdNRZrawDemod(Cmd+2);
1050 } else if(cmdp == 'p' && cmdp2 == '1'){
1051 ans = CmdPSK1rawDemod(Cmd+2);
1052 } else if(cmdp == 'p' && cmdp2 == '2'){
1053 ans = CmdPSK2rawDemod(Cmd+2);
1054 } else {
1055 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1056 }
1057 return ans;
1058 }
1059
1060 void setClockGrid(int clk, int offset) {
1061 g_DemodStartIdx = offset;
1062 g_DemodClock = clk;
1063 PrintAndLog("demodoffset %d, clk %d",offset,clk);
1064 if (offset > clk) offset %= clk;
1065 if (offset < 0) offset += clk;
1066
1067 if (offset > GraphTraceLen || offset < 0) return;
1068 if (clk < 8 || clk > GraphTraceLen) {
1069 GridLocked = false;
1070 GridOffset = 0;
1071 PlotGridX = 0;
1072 PlotGridXdefault = 0;
1073 RepaintGraphWindow();
1074 } else {
1075 GridLocked = true;
1076 GridOffset = offset;
1077 PlotGridX = clk;
1078 PlotGridXdefault = clk;
1079 RepaintGraphWindow();
1080 }
1081 }
1082
1083 int CmdGrid(const char *Cmd)
1084 {
1085 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1086 PlotGridXdefault= PlotGridX;
1087 PlotGridYdefault= PlotGridY;
1088 RepaintGraphWindow();
1089 return 0;
1090 }
1091
1092 int CmdSetGraphMarkers(const char *Cmd) {
1093 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1094 RepaintGraphWindow();
1095 return 0;
1096 }
1097
1098 int CmdHexsamples(const char *Cmd)
1099 {
1100 int i, j;
1101 int requested = 0;
1102 int offset = 0;
1103 char string_buf[25];
1104 char* string_ptr = string_buf;
1105 uint8_t got[BIGBUF_SIZE];
1106
1107 sscanf(Cmd, "%i %i", &requested, &offset);
1108
1109 /* if no args send something */
1110 if (requested == 0) {
1111 requested = 8;
1112 }
1113 if (offset + requested > sizeof(got)) {
1114 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1115 return 0;
1116 }
1117
1118 GetFromBigBuf(got,requested,offset);
1119 WaitForResponse(CMD_ACK,NULL);
1120
1121 i = 0;
1122 for (j = 0; j < requested; j++) {
1123 i++;
1124 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1125 if (i == 8) {
1126 *(string_ptr - 1) = '\0'; // remove the trailing space
1127 PrintAndLog("%s", string_buf);
1128 string_buf[0] = '\0';
1129 string_ptr = string_buf;
1130 i = 0;
1131 }
1132 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1133 *(string_ptr - 1) = '\0';
1134 PrintAndLog("%s", string_buf);
1135 string_buf[0] = '\0';
1136 }
1137 }
1138 return 0;
1139 }
1140
1141 int CmdHide(const char *Cmd)
1142 {
1143 HideGraphWindow();
1144 return 0;
1145 }
1146
1147 //zero mean GraphBuffer
1148 int CmdHpf(const char *Cmd)
1149 {
1150 int i;
1151 int accum = 0;
1152
1153 for (i = 10; i < GraphTraceLen; ++i)
1154 accum += GraphBuffer[i];
1155 accum /= (GraphTraceLen - 10);
1156 for (i = 0; i < GraphTraceLen; ++i)
1157 GraphBuffer[i] -= accum;
1158
1159 RepaintGraphWindow();
1160 return 0;
1161 }
1162
1163 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1164 {
1165 int i;
1166 uint8_t val = 0;
1167 for(i =0 ; i < bits_per_sample; i++)
1168 {
1169 val |= (headBit(b) << (7-i));
1170 }
1171 return val;
1172 }
1173
1174 int getSamples(int n, bool silent)
1175 {
1176 //If we get all but the last byte in bigbuf,
1177 // we don't have to worry about remaining trash
1178 // in the last byte in case the bits-per-sample
1179 // does not line up on byte boundaries
1180
1181 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1182
1183 if (n == 0 || n > sizeof(got))
1184 n = sizeof(got);
1185
1186 if (!silent) PrintAndLog("Reading %d bytes from device memory\n", n);
1187 GetFromBigBuf(got,n,0);
1188 if (!silent) PrintAndLog("Data fetched");
1189 UsbCommand response;
1190 WaitForResponse(CMD_ACK, &response);
1191 uint8_t bits_per_sample = 8;
1192
1193 //Old devices without this feature would send 0 at arg[0]
1194 if(response.arg[0] > 0)
1195 {
1196 sample_config *sc = (sample_config *) response.d.asBytes;
1197 if (!silent) PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1198 , sc->decimation);
1199 bits_per_sample = sc->bits_per_sample;
1200 }
1201 if(bits_per_sample < 8)
1202 {
1203 if (!silent) PrintAndLog("Unpacking...");
1204 BitstreamIn bout = { got, bits_per_sample * n, 0};
1205 int j =0;
1206 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1207 uint8_t sample = getByte(bits_per_sample, &bout);
1208 GraphBuffer[j] = ((int) sample )- 128;
1209 }
1210 GraphTraceLen = j;
1211 PrintAndLog("Unpacked %d samples" , j );
1212 }else
1213 {
1214 for (int j = 0; j < n; j++) {
1215 GraphBuffer[j] = ((int)got[j]) - 128;
1216 }
1217 GraphTraceLen = n;
1218 }
1219
1220 setClockGrid(0,0);
1221 RepaintGraphWindow();
1222 return 0;
1223 }
1224
1225 int CmdSamples(const char *Cmd)
1226 {
1227 int n = strtol(Cmd, NULL, 0);
1228 return getSamples(n, false);
1229 }
1230
1231 int CmdTuneSamples(const char *Cmd)
1232 {
1233 int timeout = 0, arg = FLAG_TUNE_ALL;
1234
1235 if(*Cmd == 'l') {
1236 arg = FLAG_TUNE_LF;
1237 } else if (*Cmd == 'h') {
1238 arg = FLAG_TUNE_HF;
1239 } else if (*Cmd != '\0') {
1240 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1241 return 0;
1242 }
1243
1244 printf("\nMeasuring antenna characteristics, please wait...");
1245
1246 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1247 SendCommand(&c);
1248
1249 UsbCommand resp;
1250 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1251 timeout++;
1252 printf(".");
1253 if (timeout > 7) {
1254 PrintAndLog("\nNo response from Proxmark. Aborting...");
1255 return 1;
1256 }
1257 }
1258
1259 int peakv, peakf;
1260 int vLf125, vLf134, vHf;
1261 vLf125 = resp.arg[0] & 0xffff;
1262 vLf134 = resp.arg[0] >> 16;
1263 vHf = resp.arg[1] & 0xffff;;
1264 peakf = resp.arg[2] & 0xffff;
1265 peakv = resp.arg[2] >> 16;
1266 PrintAndLog("");
1267 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1268 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1269 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1270 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1271
1272 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1273 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1274 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1275 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1276
1277 if (peakv < LF_UNUSABLE_V)
1278 PrintAndLog("# Your LF antenna is unusable.");
1279 else if (peakv < LF_MARGINAL_V)
1280 PrintAndLog("# Your LF antenna is marginal.");
1281 if (vHf < HF_UNUSABLE_V)
1282 PrintAndLog("# Your HF antenna is unusable.");
1283 else if (vHf < HF_MARGINAL_V)
1284 PrintAndLog("# Your HF antenna is marginal.");
1285
1286 if (peakv >= LF_UNUSABLE_V) {
1287 for (int i = 0; i < 256; i++) {
1288 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1289 }
1290 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1291 PrintAndLog("\n");
1292 GraphTraceLen = 256;
1293 ShowGraphWindow();
1294 RepaintGraphWindow();
1295 }
1296
1297 return 0;
1298 }
1299
1300
1301 int CmdLoad(const char *Cmd)
1302 {
1303 char filename[FILE_PATH_SIZE] = {0x00};
1304 int len = 0;
1305
1306 len = strlen(Cmd);
1307 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1308 memcpy(filename, Cmd, len);
1309
1310 FILE *f = fopen(filename, "r");
1311 if (!f) {
1312 PrintAndLog("couldn't open '%s'", filename);
1313 return 0;
1314 }
1315
1316 GraphTraceLen = 0;
1317 char line[80];
1318 while (fgets(line, sizeof (line), f)) {
1319 GraphBuffer[GraphTraceLen] = atoi(line);
1320 GraphTraceLen++;
1321 }
1322 fclose(f);
1323 PrintAndLog("loaded %d samples", GraphTraceLen);
1324 setClockGrid(0,0);
1325 RepaintGraphWindow();
1326 return 0;
1327 }
1328
1329 int CmdLtrim(const char *Cmd)
1330 {
1331 int ds = atoi(Cmd);
1332 if (GraphTraceLen<=0) return 0;
1333 for (int i = ds; i < GraphTraceLen; ++i)
1334 GraphBuffer[i-ds] = GraphBuffer[i];
1335 GraphTraceLen -= ds;
1336
1337 RepaintGraphWindow();
1338 return 0;
1339 }
1340
1341 // trim graph to input argument length
1342 int CmdRtrim(const char *Cmd)
1343 {
1344 int ds = atoi(Cmd);
1345
1346 GraphTraceLen = ds;
1347
1348 RepaintGraphWindow();
1349 return 0;
1350 }
1351
1352 // trim graph (middle) piece
1353 int CmdMtrim(const char *Cmd) {
1354 int start = 0, stop = 0;
1355 sscanf(Cmd, "%i %i", &start, &stop);
1356
1357 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1358 start++; //leave start position sample
1359
1360 GraphTraceLen = stop - start;
1361 for (int i = 0; i < GraphTraceLen; i++) {
1362 GraphBuffer[i] = GraphBuffer[start+i];
1363 }
1364 return 0;
1365 }
1366
1367
1368 int CmdNorm(const char *Cmd)
1369 {
1370 int i;
1371 int max = INT_MIN, min = INT_MAX;
1372
1373 for (i = 10; i < GraphTraceLen; ++i) {
1374 if (GraphBuffer[i] > max)
1375 max = GraphBuffer[i];
1376 if (GraphBuffer[i] < min)
1377 min = GraphBuffer[i];
1378 }
1379
1380 if (max != min) {
1381 for (i = 0; i < GraphTraceLen; ++i) {
1382 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
1383 (max - min);
1384 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
1385 }
1386 }
1387 RepaintGraphWindow();
1388 return 0;
1389 }
1390
1391 int CmdPlot(const char *Cmd)
1392 {
1393 ShowGraphWindow();
1394 return 0;
1395 }
1396
1397 int CmdSave(const char *Cmd)
1398 {
1399 char filename[FILE_PATH_SIZE] = {0x00};
1400 int len = 0;
1401
1402 len = strlen(Cmd);
1403 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1404 memcpy(filename, Cmd, len);
1405
1406
1407 FILE *f = fopen(filename, "w");
1408 if(!f) {
1409 PrintAndLog("couldn't open '%s'", filename);
1410 return 0;
1411 }
1412 int i;
1413 for (i = 0; i < GraphTraceLen; i++) {
1414 fprintf(f, "%d\n", GraphBuffer[i]);
1415 }
1416 fclose(f);
1417 PrintAndLog("saved to '%s'", Cmd);
1418 return 0;
1419 }
1420
1421 int CmdScale(const char *Cmd)
1422 {
1423 CursorScaleFactor = atoi(Cmd);
1424 if (CursorScaleFactor == 0) {
1425 PrintAndLog("bad, can't have zero scale");
1426 CursorScaleFactor = 1;
1427 }
1428 RepaintGraphWindow();
1429 return 0;
1430 }
1431
1432 int CmdDirectionalThreshold(const char *Cmd)
1433 {
1434 int8_t upThres = param_get8(Cmd, 0);
1435 int8_t downThres = param_get8(Cmd, 1);
1436
1437 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1438
1439 int lastValue = GraphBuffer[0];
1440 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1441
1442 for (int i = 1; i < GraphTraceLen; ++i) {
1443 // Apply first threshold to samples heading up
1444 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
1445 {
1446 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1447 GraphBuffer[i] = 127;
1448 }
1449 // Apply second threshold to samples heading down
1450 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
1451 {
1452 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1453 GraphBuffer[i] = -127;
1454 }
1455 else
1456 {
1457 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1458 GraphBuffer[i] = GraphBuffer[i-1];
1459
1460 }
1461 }
1462 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
1463 RepaintGraphWindow();
1464 return 0;
1465 }
1466
1467 int CmdZerocrossings(const char *Cmd)
1468 {
1469 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1470 CmdHpf("");
1471
1472 int sign = 1;
1473 int zc = 0;
1474 int lastZc = 0;
1475
1476 for (int i = 0; i < GraphTraceLen; ++i) {
1477 if (GraphBuffer[i] * sign >= 0) {
1478 // No change in sign, reproduce the previous sample count.
1479 zc++;
1480 GraphBuffer[i] = lastZc;
1481 } else {
1482 // Change in sign, reset the sample count.
1483 sign = -sign;
1484 GraphBuffer[i] = lastZc;
1485 if (sign > 0) {
1486 lastZc = zc;
1487 zc = 0;
1488 }
1489 }
1490 }
1491
1492 RepaintGraphWindow();
1493 return 0;
1494 }
1495
1496 int usage_data_bin2hex(){
1497 PrintAndLog("Usage: data bin2hex <binary_digits>");
1498 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1499 return 0;
1500 }
1501
1502 /**
1503 * @brief Utility for conversion via cmdline.
1504 * @param Cmd
1505 * @return
1506 */
1507 int Cmdbin2hex(const char *Cmd)
1508 {
1509 int bg =0, en =0;
1510 if(param_getptr(Cmd, &bg, &en, 0))
1511 {
1512 return usage_data_bin2hex();
1513 }
1514 //Number of digits supplied as argument
1515 size_t length = en - bg +1;
1516 size_t bytelen = (length+7) / 8;
1517 uint8_t* arr = (uint8_t *) malloc(bytelen);
1518 memset(arr, 0, bytelen);
1519 BitstreamOut bout = { arr, 0, 0 };
1520
1521 for(; bg <= en ;bg++)
1522 {
1523 char c = Cmd[bg];
1524 if( c == '1') pushBit(&bout, 1);
1525 else if( c == '0') pushBit(&bout, 0);
1526 else PrintAndLog("Ignoring '%c'", c);
1527 }
1528
1529 if(bout.numbits % 8 != 0)
1530 {
1531 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1532 }
1533
1534 //Uses printf instead of PrintAndLog since the latter
1535 // adds linebreaks to each printout - this way was more convenient since we don't have to
1536 // allocate a string and write to that first...
1537 for(size_t x = 0; x < bytelen ; x++)
1538 {
1539 printf("%02X", arr[x]);
1540 }
1541 printf("\n");
1542 free(arr);
1543 return 0;
1544 }
1545
1546 int usage_data_hex2bin() {
1547 PrintAndLog("Usage: data hex2bin <hex_digits>");
1548 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1549 return 0;
1550
1551 }
1552
1553 int Cmdhex2bin(const char *Cmd)
1554 {
1555 int bg =0, en =0;
1556 if(param_getptr(Cmd, &bg, &en, 0))
1557 {
1558 return usage_data_hex2bin();
1559 }
1560
1561
1562 while(bg <= en )
1563 {
1564 char x = Cmd[bg++];
1565 // capitalize
1566 if (x >= 'a' && x <= 'f')
1567 x -= 32;
1568 // convert to numeric value
1569 if (x >= '0' && x <= '9')
1570 x -= '0';
1571 else if (x >= 'A' && x <= 'F')
1572 x -= 'A' - 10;
1573 else
1574 continue;
1575
1576 //Uses printf instead of PrintAndLog since the latter
1577 // adds linebreaks to each printout - this way was more convenient since we don't have to
1578 // allocate a string and write to that first...
1579
1580 for(int i= 0 ; i < 4 ; ++i)
1581 printf("%d",(x >> (3 - i)) & 1);
1582 }
1583 printf("\n");
1584
1585 return 0;
1586 }
1587
1588 static command_t CommandTable[] =
1589 {
1590 {"help", CmdHelp, 1, "This help"},
1591 {"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)"},
1592 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
1593 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
1594 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
1595 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1596 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1597 {"dec", CmdDec, 1, "Decimate samples"},
1598 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
1599 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1600 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1601 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1602 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
1603 {"hide", CmdHide, 1, "Hide graph window"},
1604 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1605 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1606 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1607 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1608 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
1609 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
1610 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1611 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1612 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
1613 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1614 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1615 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1616 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
1617 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1618 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
1619 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
1620 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1621 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1622 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1623 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1624 {NULL, NULL, 0, NULL}
1625 };
1626
1627 int CmdData(const char *Cmd)
1628 {
1629 CmdsParse(CommandTable, Cmd);
1630 return 0;
1631 }
1632
1633 int CmdHelp(const char *Cmd)
1634 {
1635 CmdsHelp(CommandTable);
1636 return 0;
1637 }
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