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