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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 "crc.h" // for pyramid checksum maxim
26 #include "crc16.h" // for FDXB demod checksum
27 #include "loclass/cipherutils.h" // for decimating samples in getsamples
28 #include "cmdlfem4x.h"// for em410x demod
29
30 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
31 uint8_t g_debugMode=0;
32 size_t DemodBufferLen=0;
33 //size_t g_demodStartIdx=0;
34 //uint8_t g_demodClock=0;
35
36 static int CmdHelp(const char *Cmd);
37
38 //set the demod buffer with given array of binary (one bit per byte)
39 //by marshmellow
40 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
41 {
42 if (buff == NULL)
43 return;
44
45 if ( size >= MAX_DEMOD_BUF_LEN)
46 size = MAX_DEMOD_BUF_LEN;
47
48 size_t i = 0;
49 for (; i < size; i++){
50 DemodBuffer[i]=buff[startIdx++];
51 }
52 DemodBufferLen=size;
53 return;
54 }
55
56 int CmdSetDebugMode(const char *Cmd)
57 {
58 int demod=0;
59 sscanf(Cmd, "%i", &demod);
60 g_debugMode=(uint8_t)demod;
61 return 1;
62 }
63
64 int usage_data_printdemodbuf(){
65 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
66 PrintAndLog("Options: ");
67 PrintAndLog(" h This help");
68 PrintAndLog(" x output in hex (omit for binary output)");
69 PrintAndLog(" o <offset> enter offset in # of bits");
70 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
71 return 0;
72 }
73
74 //by marshmellow
75 void printDemodBuff(void)
76 {
77 int bitLen = DemodBufferLen;
78 if (bitLen<1) {
79 PrintAndLog("no bits found in demod buffer");
80 return;
81 }
82 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
83
84 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
85 PrintAndLog("%s",bin);
86
87 return;
88 }
89
90 int CmdPrintDemodBuff(const char *Cmd)
91 {
92 char hex[512]={0x00};
93 bool hexMode = false;
94 bool errors = false;
95 uint32_t offset = 0; //could be size_t but no param_get16...
96 uint32_t length = 512;
97 char cmdp = 0;
98 while(param_getchar(Cmd, cmdp) != 0x00)
99 {
100 switch(param_getchar(Cmd, cmdp))
101 {
102 case 'h':
103 case 'H':
104 return usage_data_printdemodbuf();
105 case 'x':
106 case 'X':
107 hexMode = true;
108 cmdp++;
109 break;
110 case 'o':
111 case 'O':
112 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
113 if (!offset) errors = true;
114 cmdp += 2;
115 break;
116 case 'l':
117 case 'L':
118 length = param_get32ex(Cmd, cmdp+1, 512, 10);
119 if (!length) errors = true;
120 cmdp += 2;
121 break;
122 default:
123 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
124 errors = true;
125 break;
126 }
127 if(errors) break;
128 }
129 //Validations
130 if(errors) return usage_data_printdemodbuf();
131 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
132 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
133
134 if (hexMode){
135 char *buf = (char *) (DemodBuffer + offset);
136 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
137 numBits = binarraytohex(hex, buf, numBits);
138 if (numBits==0) return 0;
139 PrintAndLog("DemodBuffer: %s",hex);
140 } else {
141 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
142 }
143 return 1;
144 }
145
146 //by marshmellow
147 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
148 int CmdGetBitStream(const char *Cmd)
149 {
150 int i;
151 CmdHpf(Cmd);
152 for (i = 0; i < GraphTraceLen; i++) {
153 if (GraphBuffer[i] >= 1) {
154 GraphBuffer[i] = 1;
155 } else {
156 GraphBuffer[i] = 0;
157 }
158 }
159 RepaintGraphWindow();
160 return 0;
161 }
162
163 //by marshmellow
164 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
165 // (amp may not be needed anymore)
166 //verbose will print results and demoding messages
167 //emSearch will auto search for EM410x format in bitstream
168 //askType switches decode: ask/raw = 0, ask/manchester = 1
169 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
170 int invert=0;
171 int clk=0;
172 int maxErr=100;
173 int maxLen=0;
174 uint8_t askamp = 0;
175 char amp = param_getchar(Cmd, 0);
176 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
177 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
178 if (!maxLen) maxLen = BIGBUF_SIZE;
179 if (invert != 0 && invert != 1) {
180 PrintAndLog("Invalid argument: %s", Cmd);
181 return 0;
182 }
183 if (clk==1){
184 invert=1;
185 clk=0;
186 }
187 size_t BitLen = getFromGraphBuf(BitStream);
188 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
189 if (BitLen < 255) return 0;
190 if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
191 int foundclk = 0;
192 //amp before ST check
193 if (amp == 'a' || amp == 'A') {
194 askAmp(BitStream, BitLen);
195 }
196 bool st = false;
197 size_t ststart = 0, stend = 0;
198 if (*stCheck) st = DetectST_ext(BitStream, &BitLen, &foundclk, &ststart, &stend);
199 if (st) {
200 *stCheck = st;
201 clk = (clk == 0) ? foundclk : clk;
202 CursorCPos = ststart;
203 CursorDPos = stend;
204 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
205 }
206 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);
207 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
208 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
209 return 0;
210 }
211 if (errCnt > maxErr){
212 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
213 return 0;
214 }
215 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
216
217 //output
218 setDemodBuf(BitStream,BitLen,0);
219 if (verbose || g_debugMode){
220 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
221 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
222 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
223 // Now output the bitstream to the scrollback by line of 16 bits
224 printDemodBuff();
225
226 }
227 uint64_t lo = 0;
228 uint32_t hi = 0;
229 if (emSearch){
230 AskEm410xDecode(true, &hi, &lo);
231 }
232 return 1;
233 }
234 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
235 bool st = false;
236 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
237 }
238
239 //by marshmellow
240 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
241 //attempts to demodulate ask while decoding manchester
242 //prints binary found and saves in graphbuffer for further commands
243 int Cmdaskmandemod(const char *Cmd)
244 {
245 char cmdp = param_getchar(Cmd, 0);
246 if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
247 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
248 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
249 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
250 PrintAndLog(" <invert>, 1 to invert output");
251 PrintAndLog(" [set maximum allowed errors], default = 100");
252 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
253 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
254 PrintAndLog("");
255 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
256 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
257 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
258 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
259 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");
260 return 0;
261 }
262 bool st = true;
263 if (Cmd[0]=='s')
264 return ASKDemod_ext(Cmd++, true, true, 1, &st);
265 else if (Cmd[1] == 's')
266 return ASKDemod_ext(Cmd+=2, true, true, 1, &st);
267 else
268 return ASKDemod(Cmd, true, true, 1);
269 }
270
271 //by marshmellow
272 //manchester decode
273 //stricktly take 10 and 01 and convert to 0 and 1
274 int Cmdmandecoderaw(const char *Cmd)
275 {
276 int i =0;
277 int errCnt=0;
278 size_t size=0;
279 int invert=0;
280 int maxErr = 20;
281 char cmdp = param_getchar(Cmd, 0);
282 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
283 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
284 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
285 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
286 PrintAndLog(" [invert] invert output");
287 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
288 PrintAndLog("");
289 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
290 return 0;
291 }
292 if (DemodBufferLen==0) return 0;
293 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
294 int high=0,low=0;
295 for (;i<DemodBufferLen;++i){
296 if (DemodBuffer[i]>high) high=DemodBuffer[i];
297 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
298 BitStream[i]=DemodBuffer[i];
299 }
300 if (high>7 || low <0 ){
301 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
302 return 0;
303 }
304
305 sscanf(Cmd, "%i %i", &invert, &maxErr);
306 size=i;
307 uint8_t alignPos = 0;
308 errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
309 if (errCnt>=maxErr){
310 PrintAndLog("Too many errors: %d",errCnt);
311 return 0;
312 }
313 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
314 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
315 if (errCnt==0){
316 uint64_t id = 0;
317 uint32_t hi = 0;
318 size_t idx=0;
319 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
320 //need to adjust to set bitstream back to manchester encoded data
321 //setDemodBuf(BitStream, size, idx);
322
323 printEM410x(hi, id);
324 }
325 }
326 return 1;
327 }
328
329 //by marshmellow
330 //biphase decode
331 //take 01 or 10 = 0 and 11 or 00 = 1
332 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
333 // and "invert" default = 0 if 1 it will invert output
334 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
335 int CmdBiphaseDecodeRaw(const char *Cmd)
336 {
337 size_t size=0;
338 int offset=0, invert=0, maxErr=20, errCnt=0;
339 char cmdp = param_getchar(Cmd, 0);
340 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
341 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
342 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
343 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
344 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
345 PrintAndLog("");
346 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
347 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
348 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
349 PrintAndLog("");
350 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
351 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
352 return 0;
353 }
354 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
355 if (DemodBufferLen==0){
356 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
357 return 0;
358 }
359 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
360 memcpy(BitStream, DemodBuffer, DemodBufferLen);
361 size = DemodBufferLen;
362 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
363 if (errCnt<0){
364 PrintAndLog("Error during decode:%d", errCnt);
365 return 0;
366 }
367 if (errCnt>maxErr){
368 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
369 return 0;
370 }
371
372 if (errCnt>0){
373 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
374 }
375 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
376 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
377
378 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
379 return 1;
380 }
381
382 //by marshmellow
383 // - ASK Demod then Biphase decode GraphBuffer samples
384 int ASKbiphaseDemod(const char *Cmd, bool verbose)
385 {
386 //ask raw demod GraphBuffer first
387 int offset=0, clk=0, invert=0, maxErr=0;
388 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
389
390 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
391 size_t size = getFromGraphBuf(BitStream);
392 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
393 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
394 if ( errCnt < 0 || errCnt > maxErr ) {
395 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
396 return 0;
397 }
398
399 //attempt to Biphase decode BitStream
400 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
401 if (errCnt < 0){
402 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
403 return 0;
404 }
405 if (errCnt > maxErr) {
406 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
407 return 0;
408 }
409 //success set DemodBuffer and return
410 setDemodBuf(BitStream, size, 0);
411 if (g_debugMode || verbose){
412 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
413 printDemodBuff();
414 }
415 return 1;
416 }
417 //by marshmellow - see ASKbiphaseDemod
418 int Cmdaskbiphdemod(const char *Cmd)
419 {
420 char cmdp = param_getchar(Cmd, 0);
421 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
422 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
423 PrintAndLog(" [offset], offset to begin biphase, default=0");
424 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
425 PrintAndLog(" <invert>, 1 to invert output");
426 PrintAndLog(" [set maximum allowed errors], default = 100");
427 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
428 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
429 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
430 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
431 PrintAndLog(" NOTE: any other arg must have previous args set to work");
432 PrintAndLog("");
433 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
434 PrintAndLog("");
435 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
436 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
437 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
438 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
439 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
440 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");
441 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");
442 return 0;
443 }
444 return ASKbiphaseDemod(Cmd, true);
445 }
446
447 //by marshmellow - see ASKDemod
448 int Cmdaskrawdemod(const char *Cmd)
449 {
450 char cmdp = param_getchar(Cmd, 0);
451 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
452 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
453 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
454 PrintAndLog(" <invert>, 1 to invert output");
455 PrintAndLog(" [set maximum allowed errors], default = 100");
456 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
457 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
458 PrintAndLog("");
459 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
460 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
461 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
462 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
463 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
464 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");
465 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");
466 return 0;
467 }
468 return ASKDemod(Cmd, true, false, 0);
469 }
470
471 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
472 {
473 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
474 size_t Correlation = 0;
475 int maxSum = 0;
476 int lastMax = 0;
477 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
478 for (int i = 0; i < GraphTraceLen - window; ++i) {
479 int sum = 0;
480 for (int j = 0; j < window; ++j) {
481 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
482 }
483 CorrelBuffer[i] = sum;
484 if (sum >= maxSum-100 && sum <= maxSum+100){
485 //another max
486 Correlation = i-lastMax;
487 lastMax = i;
488 if (sum > maxSum) maxSum = sum;
489 } else if (sum > maxSum){
490 maxSum=sum;
491 lastMax = i;
492 }
493 }
494 if (Correlation==0){
495 //try again with wider margin
496 for (int i = 0; i < GraphTraceLen - window; i++){
497 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
498 //another max
499 Correlation = i-lastMax;
500 lastMax = i;
501 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
502 }
503 }
504 }
505 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
506
507 if (SaveGrph){
508 GraphTraceLen = GraphTraceLen - window;
509 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
510 RepaintGraphWindow();
511 }
512 return Correlation;
513 }
514
515 int usage_data_autocorr(void)
516 {
517 //print help
518 PrintAndLog("Usage: data autocorr [window] [g]");
519 PrintAndLog("Options: ");
520 PrintAndLog(" h This help");
521 PrintAndLog(" [window] window length for correlation - default = 4000");
522 PrintAndLog(" g save back to GraphBuffer (overwrite)");
523 return 0;
524 }
525
526 int CmdAutoCorr(const char *Cmd)
527 {
528 char cmdp = param_getchar(Cmd, 0);
529 if (cmdp == 'h' || cmdp == 'H')
530 return usage_data_autocorr();
531 int window = 4000; //set default
532 char grph=0;
533 bool updateGrph = false;
534 sscanf(Cmd, "%i %c", &window, &grph);
535
536 if (window >= GraphTraceLen) {
537 PrintAndLog("window must be smaller than trace (%d samples)",
538 GraphTraceLen);
539 return 0;
540 }
541 if (grph == 'g') updateGrph=true;
542 return AutoCorrelate(window, updateGrph, true);
543 }
544
545 int CmdBitsamples(const char *Cmd)
546 {
547 int cnt = 0;
548 uint8_t got[12288];
549
550 GetFromBigBuf(got,sizeof(got),0);
551 WaitForResponse(CMD_ACK,NULL);
552
553 for (int j = 0; j < sizeof(got); j++) {
554 for (int k = 0; k < 8; k++) {
555 if(got[j] & (1 << (7 - k))) {
556 GraphBuffer[cnt++] = 1;
557 } else {
558 GraphBuffer[cnt++] = 0;
559 }
560 }
561 }
562 GraphTraceLen = cnt;
563 RepaintGraphWindow();
564 return 0;
565 }
566
567 int CmdBuffClear(const char *Cmd)
568 {
569 UsbCommand c = {CMD_BUFF_CLEAR};
570 SendCommand(&c);
571 ClearGraph(true);
572 return 0;
573 }
574
575 int CmdDec(const char *Cmd)
576 {
577 for (int i = 0; i < (GraphTraceLen / 2); ++i)
578 GraphBuffer[i] = GraphBuffer[i * 2];
579 GraphTraceLen /= 2;
580 PrintAndLog("decimated by 2");
581 RepaintGraphWindow();
582 return 0;
583 }
584 /**
585 * Undecimate - I'd call it 'interpolate', but we'll save that
586 * name until someone does an actual interpolation command, not just
587 * blindly repeating samples
588 * @param Cmd
589 * @return
590 */
591 int CmdUndec(const char *Cmd)
592 {
593 if(param_getchar(Cmd, 0) == 'h')
594 {
595 PrintAndLog("Usage: data undec [factor]");
596 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
597 PrintAndLog("Options: ");
598 PrintAndLog(" h This help");
599 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
600 PrintAndLog("Example: 'data undec 3'");
601 return 0;
602 }
603
604 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
605 //We have memory, don't we?
606 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
607 uint32_t g_index = 0, s_index = 0;
608 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
609 {
610 int count = 0;
611 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
612 swap[s_index+count] = GraphBuffer[g_index];
613
614 s_index += count;
615 g_index++;
616 }
617
618 memcpy(GraphBuffer, swap, s_index * sizeof(int));
619 GraphTraceLen = s_index;
620 RepaintGraphWindow();
621 return 0;
622 }
623
624 //by marshmellow
625 //shift graph zero up or down based on input + or -
626 int CmdGraphShiftZero(const char *Cmd)
627 {
628
629 int shift=0;
630 //set options from parameters entered with the command
631 sscanf(Cmd, "%i", &shift);
632 int shiftedVal=0;
633 for(int i = 0; i<GraphTraceLen; i++){
634 shiftedVal=GraphBuffer[i]+shift;
635 if (shiftedVal>127)
636 shiftedVal=127;
637 else if (shiftedVal<-127)
638 shiftedVal=-127;
639 GraphBuffer[i]= shiftedVal;
640 }
641 CmdNorm("");
642 return 0;
643 }
644
645 //by marshmellow
646 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
647 //similar to dirtheshold, threshold commands
648 //takes a threshold length which is the measured length between two samples then determines an edge
649 int CmdAskEdgeDetect(const char *Cmd)
650 {
651 int thresLen = 25;
652 int Last = 0;
653 sscanf(Cmd, "%i", &thresLen);
654
655 for(int i = 1; i<GraphTraceLen; i++){
656 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
657 Last = 127;
658 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
659 Last = -127;
660 GraphBuffer[i-1] = Last;
661 }
662 RepaintGraphWindow();
663 return 0;
664 }
665
666 /* Print our clock rate */
667 // uses data from graphbuffer
668 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
669 int CmdDetectClockRate(const char *Cmd)
670 {
671 char cmdp = param_getchar(Cmd, 0);
672 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
673 PrintAndLog("Usage: data detectclock [modulation] <clock>");
674 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
675 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
676 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
677 PrintAndLog("");
678 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
679 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
680 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
681 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
682 }
683 int ans=0;
684 if (cmdp == 'a'){
685 ans = GetAskClock(Cmd+1, true, false);
686 } else if (cmdp == 'f'){
687 ans = GetFskClock("", true, false);
688 } else if (cmdp == 'n'){
689 ans = GetNrzClock("", true, false);
690 } else if (cmdp == 'p'){
691 ans = GetPskClock("", true, false);
692 } else {
693 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
694 }
695 return ans;
696 }
697
698 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
699 {
700 static char fType[8];
701 memset(fType, 0x00, 8);
702 char *fskType = fType;
703 if (fchigh==10 && fclow==8){
704 if (invert) //fsk2a
705 memcpy(fskType, "FSK2a", 5);
706 else //fsk2
707 memcpy(fskType, "FSK2", 4);
708 } else if (fchigh == 8 && fclow == 5) {
709 if (invert)
710 memcpy(fskType, "FSK1", 4);
711 else
712 memcpy(fskType, "FSK1a", 5);
713 } else {
714 memcpy(fskType, "FSK??", 5);
715 }
716 return fskType;
717 }
718
719 //by marshmellow
720 //fsk raw demod and print binary
721 //takes 4 arguments - Clock, invert, fchigh, fclow
722 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
723 int FSKrawDemod(const char *Cmd, bool verbose)
724 {
725 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
726 uint8_t rfLen, invert, fchigh, fclow;
727 //set defaults
728 //set options from parameters entered with the command
729 rfLen = param_get8(Cmd, 0);
730 invert = param_get8(Cmd, 1);
731 fchigh = param_get8(Cmd, 2);
732 fclow = param_get8(Cmd, 3);
733
734 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
735 if (rfLen==1) {
736 invert = 1; //if invert option only is used
737 rfLen = 0;
738 }
739 }
740 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
741 size_t BitLen = getFromGraphBuf(BitStream);
742 if (BitLen==0) return 0;
743 //get field clock lengths
744 uint16_t fcs=0;
745 if (!fchigh || !fclow) {
746 fcs = countFC(BitStream, BitLen, 1);
747 if (!fcs) {
748 fchigh = 10;
749 fclow = 8;
750 } else {
751 fchigh = (fcs >> 8) & 0x00FF;
752 fclow = fcs & 0x00FF;
753 }
754 }
755 //get bit clock length
756 if (!rfLen) {
757 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
758 if (!rfLen) rfLen = 50;
759 }
760 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
761 if (size > 0) {
762 setDemodBuf(BitStream,size,0);
763
764 // Now output the bitstream to the scrollback by line of 16 bits
765 if (verbose || g_debugMode) {
766 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
767 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
768 printDemodBuff();
769 }
770
771 return 1;
772 } else {
773 if (g_debugMode) PrintAndLog("no FSK data found");
774 }
775 return 0;
776 }
777
778 //by marshmellow
779 //fsk raw demod and print binary
780 //takes 4 arguments - Clock, invert, fchigh, fclow
781 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
782 int CmdFSKrawdemod(const char *Cmd)
783 {
784 char cmdp = param_getchar(Cmd, 0);
785 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
786 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
787 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
788 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
789 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
790 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
791 PrintAndLog("");
792 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
793 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
794 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
795 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
796 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
797 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
798 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
799 return 0;
800 }
801 return FSKrawDemod(Cmd, true);
802 }
803
804 //by marshmellow
805 //attempt to psk1 demod graph buffer
806 int PSKDemod(const char *Cmd, bool verbose)
807 {
808 int invert=0;
809 int clk=0;
810 int maxErr=100;
811 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
812 if (clk==1){
813 invert=1;
814 clk=0;
815 }
816 if (invert != 0 && invert != 1) {
817 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
818 return 0;
819 }
820 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
821 size_t BitLen = getFromGraphBuf(BitStream);
822 if (BitLen==0) return 0;
823 uint8_t carrier=countFC(BitStream, BitLen, 0);
824 if (carrier!=2 && carrier!=4 && carrier!=8){
825 //invalid carrier
826 return 0;
827 }
828 if (g_debugMode){
829 PrintAndLog("Carrier: rf/%d",carrier);
830 }
831 int errCnt=0;
832 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
833 if (errCnt > maxErr){
834 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
835 return 0;
836 }
837 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
838 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
839 return 0;
840 }
841 if (verbose || g_debugMode){
842 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
843 if (errCnt>0){
844 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
845 }
846 }
847 //prime demod buffer for output
848 setDemodBuf(BitStream,BitLen,0);
849 return 1;
850 }
851
852 // by marshmellow
853 // takes 3 arguments - clock, invert, maxErr as integers
854 // attempts to demodulate nrz only
855 // prints binary found and saves in demodbuffer for further commands
856 int NRZrawDemod(const char *Cmd, bool verbose)
857 {
858 int invert=0;
859 int clk=0;
860 int maxErr=100;
861 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
862 if (clk==1){
863 invert=1;
864 clk=0;
865 }
866 if (invert != 0 && invert != 1) {
867 PrintAndLog("Invalid argument: %s", Cmd);
868 return 0;
869 }
870 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
871 size_t BitLen = getFromGraphBuf(BitStream);
872 if (BitLen==0) return 0;
873 int errCnt=0;
874 int clkStartIdx = 0;
875 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
876 if (errCnt > maxErr){
877 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
878 return 0;
879 }
880 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
881 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
882 return 0;
883 }
884 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
885 //prime demod buffer for output
886 setDemodBuf(BitStream,BitLen,0);
887
888 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
889 if (verbose || g_debugMode) {
890 PrintAndLog("NRZ demoded bitstream:");
891 // Now output the bitstream to the scrollback by line of 16 bits
892 printDemodBuff();
893 }
894 return 1;
895 }
896
897 int CmdNRZrawDemod(const char *Cmd)
898 {
899 char cmdp = param_getchar(Cmd, 0);
900 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
901 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
902 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
903 PrintAndLog(" <invert>, 1 for invert output");
904 PrintAndLog(" [set maximum allowed errors], default = 100.");
905 PrintAndLog("");
906 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
907 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
908 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
909 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
910 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");
911 return 0;
912 }
913 return NRZrawDemod(Cmd, true);
914 }
915
916 // by marshmellow
917 // takes 3 arguments - clock, invert, maxErr as integers
918 // attempts to demodulate psk only
919 // prints binary found and saves in demodbuffer for further commands
920 int CmdPSK1rawDemod(const char *Cmd)
921 {
922 int ans;
923 char cmdp = param_getchar(Cmd, 0);
924 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
925 PrintAndLog("Usage: data rawdemod p1 [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 p1 = demod a psk1 tag from GraphBuffer");
931 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
932 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
933 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
934 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");
935 return 0;
936 }
937 ans = PSKDemod(Cmd, true);
938 //output
939 if (!ans){
940 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
941 return 0;
942 }
943
944 PrintAndLog("PSK1 demoded bitstream:");
945 // Now output the bitstream to the scrollback by line of 16 bits
946 printDemodBuff();
947 return 1;
948 }
949
950 // by marshmellow
951 // takes same args as cmdpsk1rawdemod
952 int CmdPSK2rawDemod(const char *Cmd)
953 {
954 int ans=0;
955 char cmdp = param_getchar(Cmd, 0);
956 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
957 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
958 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
959 PrintAndLog(" <invert>, 1 for invert output");
960 PrintAndLog(" [set maximum allowed errors], default = 100.");
961 PrintAndLog("");
962 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
963 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
964 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
965 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
966 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");
967 return 0;
968 }
969 ans=PSKDemod(Cmd, true);
970 if (!ans){
971 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
972 return 0;
973 }
974 psk1TOpsk2(DemodBuffer, DemodBufferLen);
975 PrintAndLog("PSK2 demoded bitstream:");
976 // Now output the bitstream to the scrollback by line of 16 bits
977 printDemodBuff();
978 return 1;
979 }
980
981 // by marshmellow - combines all raw demod functions into one menu command
982 int CmdRawDemod(const char *Cmd)
983 {
984 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
985
986 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
987 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
988 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
989 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
990 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
991 PrintAndLog(" <options> see specific modulation help for optional parameters");
992 PrintAndLog("");
993 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
994 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
995 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
996 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
997 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
998 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
999 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1000 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1001 return 0;
1002 }
1003 char cmdp2 = Cmd[1];
1004 int ans = 0;
1005 if (cmdp == 'f' && cmdp2 == 's'){
1006 ans = CmdFSKrawdemod(Cmd+2);
1007 } else if(cmdp == 'a' && cmdp2 == 'b'){
1008 ans = Cmdaskbiphdemod(Cmd+2);
1009 } else if(cmdp == 'a' && cmdp2 == 'm'){
1010 ans = Cmdaskmandemod(Cmd+2);
1011 } else if(cmdp == 'a' && cmdp2 == 'r'){
1012 ans = Cmdaskrawdemod(Cmd+2);
1013 } else if(cmdp == 'n' && cmdp2 == 'r'){
1014 ans = CmdNRZrawDemod(Cmd+2);
1015 } else if(cmdp == 'p' && cmdp2 == '1'){
1016 ans = CmdPSK1rawDemod(Cmd+2);
1017 } else if(cmdp == 'p' && cmdp2 == '2'){
1018 ans = CmdPSK2rawDemod(Cmd+2);
1019 } else {
1020 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1021 }
1022 return ans;
1023 }
1024
1025 int CmdGrid(const char *Cmd)
1026 {
1027 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1028 PlotGridXdefault= PlotGridX;
1029 PlotGridYdefault= PlotGridY;
1030 RepaintGraphWindow();
1031 return 0;
1032 }
1033
1034 int CmdSetGraphMarkers(const char *Cmd) {
1035 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1036 RepaintGraphWindow();
1037 return 0;
1038 }
1039
1040 int CmdHexsamples(const char *Cmd)
1041 {
1042 int i, j;
1043 int requested = 0;
1044 int offset = 0;
1045 char string_buf[25];
1046 char* string_ptr = string_buf;
1047 uint8_t got[BIGBUF_SIZE];
1048
1049 sscanf(Cmd, "%i %i", &requested, &offset);
1050
1051 /* if no args send something */
1052 if (requested == 0) {
1053 requested = 8;
1054 }
1055 if (offset + requested > sizeof(got)) {
1056 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1057 return 0;
1058 }
1059
1060 GetFromBigBuf(got,requested,offset);
1061 WaitForResponse(CMD_ACK,NULL);
1062
1063 i = 0;
1064 for (j = 0; j < requested; j++) {
1065 i++;
1066 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1067 if (i == 8) {
1068 *(string_ptr - 1) = '\0'; // remove the trailing space
1069 PrintAndLog("%s", string_buf);
1070 string_buf[0] = '\0';
1071 string_ptr = string_buf;
1072 i = 0;
1073 }
1074 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1075 *(string_ptr - 1) = '\0';
1076 PrintAndLog("%s", string_buf);
1077 string_buf[0] = '\0';
1078 }
1079 }
1080 return 0;
1081 }
1082
1083 int CmdHide(const char *Cmd)
1084 {
1085 HideGraphWindow();
1086 return 0;
1087 }
1088
1089 //zero mean GraphBuffer
1090 int CmdHpf(const char *Cmd)
1091 {
1092 int i;
1093 int accum = 0;
1094
1095 for (i = 10; i < GraphTraceLen; ++i)
1096 accum += GraphBuffer[i];
1097 accum /= (GraphTraceLen - 10);
1098 for (i = 0; i < GraphTraceLen; ++i)
1099 GraphBuffer[i] -= accum;
1100
1101 RepaintGraphWindow();
1102 return 0;
1103 }
1104
1105 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1106 {
1107 int i;
1108 uint8_t val = 0;
1109 for(i =0 ; i < bits_per_sample; i++)
1110 {
1111 val |= (headBit(b) << (7-i));
1112 }
1113 return val;
1114 }
1115
1116 int getSamples(const char *Cmd, bool silent)
1117 {
1118 //If we get all but the last byte in bigbuf,
1119 // we don't have to worry about remaining trash
1120 // in the last byte in case the bits-per-sample
1121 // does not line up on byte boundaries
1122
1123 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1124
1125 int n = strtol(Cmd, NULL, 0);
1126
1127 if (n == 0 || n > sizeof(got))
1128 n = sizeof(got);
1129
1130 PrintAndLog("Reading %d bytes from device memory\n", n);
1131 GetFromBigBuf(got,n,0);
1132 PrintAndLog("Data fetched");
1133 UsbCommand response;
1134 WaitForResponse(CMD_ACK, &response);
1135 uint8_t bits_per_sample = 8;
1136
1137 //Old devices without this feature would send 0 at arg[0]
1138 if(response.arg[0] > 0)
1139 {
1140 sample_config *sc = (sample_config *) response.d.asBytes;
1141 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1142 , sc->decimation);
1143 bits_per_sample = sc->bits_per_sample;
1144 }
1145 if(bits_per_sample < 8)
1146 {
1147 PrintAndLog("Unpacking...");
1148 BitstreamIn bout = { got, bits_per_sample * n, 0};
1149 int j =0;
1150 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1151 uint8_t sample = getByte(bits_per_sample, &bout);
1152 GraphBuffer[j] = ((int) sample )- 128;
1153 }
1154 GraphTraceLen = j;
1155 PrintAndLog("Unpacked %d samples" , j );
1156 }else
1157 {
1158 for (int j = 0; j < n; j++) {
1159 GraphBuffer[j] = ((int)got[j]) - 128;
1160 }
1161 GraphTraceLen = n;
1162 }
1163
1164 RepaintGraphWindow();
1165 return 0;
1166 }
1167
1168 int CmdSamples(const char *Cmd)
1169 {
1170 return getSamples(Cmd, false);
1171 }
1172
1173 int CmdTuneSamples(const char *Cmd)
1174 {
1175 int timeout = 0, arg = FLAG_TUNE_ALL;
1176
1177 if(*Cmd == 'l') {
1178 arg = FLAG_TUNE_LF;
1179 } else if (*Cmd == 'h') {
1180 arg = FLAG_TUNE_HF;
1181 } else if (*Cmd != '\0') {
1182 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1183 return 0;
1184 }
1185
1186 printf("\nMeasuring antenna characteristics, please wait...");
1187
1188 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1189 SendCommand(&c);
1190
1191 UsbCommand resp;
1192 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1193 timeout++;
1194 printf(".");
1195 if (timeout > 7) {
1196 PrintAndLog("\nNo response from Proxmark. Aborting...");
1197 return 1;
1198 }
1199 }
1200
1201 int peakv, peakf;
1202 int vLf125, vLf134, vHf;
1203 vLf125 = resp.arg[0] & 0xffff;
1204 vLf134 = resp.arg[0] >> 16;
1205 vHf = resp.arg[1] & 0xffff;;
1206 peakf = resp.arg[2] & 0xffff;
1207 peakv = resp.arg[2] >> 16;
1208 PrintAndLog("");
1209 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1210 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1211 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1212 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1213
1214 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1215 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1216 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1217 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1218
1219 if (peakv < LF_UNUSABLE_V)
1220 PrintAndLog("# Your LF antenna is unusable.");
1221 else if (peakv < LF_MARGINAL_V)
1222 PrintAndLog("# Your LF antenna is marginal.");
1223 if (vHf < HF_UNUSABLE_V)
1224 PrintAndLog("# Your HF antenna is unusable.");
1225 else if (vHf < HF_MARGINAL_V)
1226 PrintAndLog("# Your HF antenna is marginal.");
1227
1228 if (peakv >= LF_UNUSABLE_V) {
1229 for (int i = 0; i < 256; i++) {
1230 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1231 }
1232 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1233 PrintAndLog("\n");
1234 GraphTraceLen = 256;
1235 ShowGraphWindow();
1236 RepaintGraphWindow();
1237 }
1238
1239 return 0;
1240 }
1241
1242
1243 int CmdLoad(const char *Cmd)
1244 {
1245 char filename[FILE_PATH_SIZE] = {0x00};
1246 int len = 0;
1247
1248 len = strlen(Cmd);
1249 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1250 memcpy(filename, Cmd, len);
1251
1252 FILE *f = fopen(filename, "r");
1253 if (!f) {
1254 PrintAndLog("couldn't open '%s'", filename);
1255 return 0;
1256 }
1257
1258 GraphTraceLen = 0;
1259 char line[80];
1260 while (fgets(line, sizeof (line), f)) {
1261 GraphBuffer[GraphTraceLen] = atoi(line);
1262 GraphTraceLen++;
1263 }
1264 fclose(f);
1265 PrintAndLog("loaded %d samples", GraphTraceLen);
1266 RepaintGraphWindow();
1267 return 0;
1268 }
1269
1270 int CmdLtrim(const char *Cmd)
1271 {
1272 int ds = atoi(Cmd);
1273 if (GraphTraceLen<=0) return 0;
1274 for (int i = ds; i < GraphTraceLen; ++i)
1275 GraphBuffer[i-ds] = GraphBuffer[i];
1276 GraphTraceLen -= ds;
1277
1278 RepaintGraphWindow();
1279 return 0;
1280 }
1281
1282 // trim graph to input argument length
1283 int CmdRtrim(const char *Cmd)
1284 {
1285 int ds = atoi(Cmd);
1286
1287 GraphTraceLen = ds;
1288
1289 RepaintGraphWindow();
1290 return 0;
1291 }
1292
1293 // trim graph (middle) piece
1294 int CmdMtrim(const char *Cmd) {
1295 int start = 0, stop = 0;
1296 sscanf(Cmd, "%i %i", &start, &stop);
1297
1298 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1299 start++; //leave start position sample
1300
1301 GraphTraceLen -= stop - start;
1302 for (int i = 0; i < GraphTraceLen; i++) {
1303 GraphBuffer[start+i] = GraphBuffer[stop+i];
1304 }
1305 return 0;
1306 }
1307
1308
1309 int CmdNorm(const char *Cmd)
1310 {
1311 int i;
1312 int max = INT_MIN, min = INT_MAX;
1313
1314 for (i = 10; i < GraphTraceLen; ++i) {
1315 if (GraphBuffer[i] > max)
1316 max = GraphBuffer[i];
1317 if (GraphBuffer[i] < min)
1318 min = GraphBuffer[i];
1319 }
1320
1321 if (max != min) {
1322 for (i = 0; i < GraphTraceLen; ++i) {
1323 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
1324 (max - min);
1325 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
1326 }
1327 }
1328 RepaintGraphWindow();
1329 return 0;
1330 }
1331
1332 int CmdPlot(const char *Cmd)
1333 {
1334 ShowGraphWindow();
1335 return 0;
1336 }
1337
1338 int CmdSave(const char *Cmd)
1339 {
1340 char filename[FILE_PATH_SIZE] = {0x00};
1341 int len = 0;
1342
1343 len = strlen(Cmd);
1344 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1345 memcpy(filename, Cmd, len);
1346
1347
1348 FILE *f = fopen(filename, "w");
1349 if(!f) {
1350 PrintAndLog("couldn't open '%s'", filename);
1351 return 0;
1352 }
1353 int i;
1354 for (i = 0; i < GraphTraceLen; i++) {
1355 fprintf(f, "%d\n", GraphBuffer[i]);
1356 }
1357 fclose(f);
1358 PrintAndLog("saved to '%s'", Cmd);
1359 return 0;
1360 }
1361
1362 int CmdScale(const char *Cmd)
1363 {
1364 CursorScaleFactor = atoi(Cmd);
1365 if (CursorScaleFactor == 0) {
1366 PrintAndLog("bad, can't have zero scale");
1367 CursorScaleFactor = 1;
1368 }
1369 RepaintGraphWindow();
1370 return 0;
1371 }
1372
1373 int CmdDirectionalThreshold(const char *Cmd)
1374 {
1375 int8_t upThres = param_get8(Cmd, 0);
1376 int8_t downThres = param_get8(Cmd, 1);
1377
1378 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1379
1380 int lastValue = GraphBuffer[0];
1381 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1382
1383 for (int i = 1; i < GraphTraceLen; ++i) {
1384 // Apply first threshold to samples heading up
1385 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
1386 {
1387 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1388 GraphBuffer[i] = 127;
1389 }
1390 // Apply second threshold to samples heading down
1391 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
1392 {
1393 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1394 GraphBuffer[i] = -127;
1395 }
1396 else
1397 {
1398 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1399 GraphBuffer[i] = GraphBuffer[i-1];
1400
1401 }
1402 }
1403 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
1404 RepaintGraphWindow();
1405 return 0;
1406 }
1407
1408 int CmdZerocrossings(const char *Cmd)
1409 {
1410 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1411 CmdHpf("");
1412
1413 int sign = 1;
1414 int zc = 0;
1415 int lastZc = 0;
1416
1417 for (int i = 0; i < GraphTraceLen; ++i) {
1418 if (GraphBuffer[i] * sign >= 0) {
1419 // No change in sign, reproduce the previous sample count.
1420 zc++;
1421 GraphBuffer[i] = lastZc;
1422 } else {
1423 // Change in sign, reset the sample count.
1424 sign = -sign;
1425 GraphBuffer[i] = lastZc;
1426 if (sign > 0) {
1427 lastZc = zc;
1428 zc = 0;
1429 }
1430 }
1431 }
1432
1433 RepaintGraphWindow();
1434 return 0;
1435 }
1436
1437 int usage_data_bin2hex(){
1438 PrintAndLog("Usage: data bin2hex <binary_digits>");
1439 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1440 return 0;
1441 }
1442
1443 /**
1444 * @brief Utility for conversion via cmdline.
1445 * @param Cmd
1446 * @return
1447 */
1448 int Cmdbin2hex(const char *Cmd)
1449 {
1450 int bg =0, en =0;
1451 if(param_getptr(Cmd, &bg, &en, 0))
1452 {
1453 return usage_data_bin2hex();
1454 }
1455 //Number of digits supplied as argument
1456 size_t length = en - bg +1;
1457 size_t bytelen = (length+7) / 8;
1458 uint8_t* arr = (uint8_t *) malloc(bytelen);
1459 memset(arr, 0, bytelen);
1460 BitstreamOut bout = { arr, 0, 0 };
1461
1462 for(; bg <= en ;bg++)
1463 {
1464 char c = Cmd[bg];
1465 if( c == '1') pushBit(&bout, 1);
1466 else if( c == '0') pushBit(&bout, 0);
1467 else PrintAndLog("Ignoring '%c'", c);
1468 }
1469
1470 if(bout.numbits % 8 != 0)
1471 {
1472 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1473 }
1474
1475 //Uses printf instead of PrintAndLog since the latter
1476 // adds linebreaks to each printout - this way was more convenient since we don't have to
1477 // allocate a string and write to that first...
1478 for(size_t x = 0; x < bytelen ; x++)
1479 {
1480 printf("%02X", arr[x]);
1481 }
1482 printf("\n");
1483 free(arr);
1484 return 0;
1485 }
1486
1487 int usage_data_hex2bin() {
1488 PrintAndLog("Usage: data hex2bin <hex_digits>");
1489 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1490 return 0;
1491
1492 }
1493
1494 int Cmdhex2bin(const char *Cmd)
1495 {
1496 int bg =0, en =0;
1497 if(param_getptr(Cmd, &bg, &en, 0))
1498 {
1499 return usage_data_hex2bin();
1500 }
1501
1502
1503 while(bg <= en )
1504 {
1505 char x = Cmd[bg++];
1506 // capitalize
1507 if (x >= 'a' && x <= 'f')
1508 x -= 32;
1509 // convert to numeric value
1510 if (x >= '0' && x <= '9')
1511 x -= '0';
1512 else if (x >= 'A' && x <= 'F')
1513 x -= 'A' - 10;
1514 else
1515 continue;
1516
1517 //Uses printf instead of PrintAndLog since the latter
1518 // adds linebreaks to each printout - this way was more convenient since we don't have to
1519 // allocate a string and write to that first...
1520
1521 for(int i= 0 ; i < 4 ; ++i)
1522 printf("%d",(x >> (3 - i)) & 1);
1523 }
1524 printf("\n");
1525
1526 return 0;
1527 }
1528
1529 static command_t CommandTable[] =
1530 {
1531 {"help", CmdHelp, 1, "This help"},
1532 {"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)"},
1533 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
1534 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
1535 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
1536 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1537 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1538 {"dec", CmdDec, 1, "Decimate samples"},
1539 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
1540 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
1541 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1542 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1543 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1544 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
1545 {"hide", CmdHide, 1, "Hide graph window"},
1546 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1547 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1548 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1549 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1550 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
1551 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
1552 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1553 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1554 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
1555 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1556 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1557 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1558 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
1559 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1560 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
1561 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
1562 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1563 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1564 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1565 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1566 {NULL, NULL, 0, NULL}
1567 };
1568
1569 int CmdData(const char *Cmd)
1570 {
1571 CmdsParse(CommandTable, Cmd);
1572 return 0;
1573 }
1574
1575 int CmdHelp(const char *Cmd)
1576 {
1577 CmdsHelp(CommandTable);
1578 return 0;
1579 }
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