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