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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 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
806 //print full Paradox Prox ID and some bit format details if found
807 int CmdFSKdemodParadox(const char *Cmd)
808 {
809 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
810 uint32_t hi2=0, hi=0, lo=0;
811
812 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
813 size_t BitLen = getFromGraphBuf(BitStream);
814 if (BitLen==0) return 0;
815 //get binary from fsk wave
816 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
817 if (idx<0){
818 if (g_debugMode){
819 if (idx==-1){
820 PrintAndLog("DEBUG: Just Noise Detected");
821 } else if (idx == -2) {
822 PrintAndLog("DEBUG: Error demoding fsk");
823 } else if (idx == -3) {
824 PrintAndLog("DEBUG: Preamble not found");
825 } else if (idx == -4) {
826 PrintAndLog("DEBUG: Error in Manchester data");
827 } else {
828 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
829 }
830 }
831 return 0;
832 }
833 if (hi2==0 && hi==0 && lo==0){
834 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
835 return 0;
836 }
837 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
838 uint32_t cardnum = (lo>>10)&0xFFFF;
839 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
840 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
841 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
842
843 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
844 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
845 setDemodBuf(BitStream,BitLen,idx);
846 if (g_debugMode){
847 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
848 printDemodBuff();
849 }
850 return 1;
851 }
852
853 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
854 // 8 databits + 1 parity (1)
855 // CIITT 16 chksum
856 // NATIONAL CODE, ICAR database
857 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
858 // FLAG (animal/non-animal)
859 /*
860 38 IDbits
861 10 country code
862 1 extra app bit
863 14 reserved bits
864 1 animal bit
865 16 ccitt CRC chksum over 64bit ID CODE.
866 24 appli bits.
867
868 -- sample: 985121004515220 [ 37FF65B88EF94 ]
869 */
870 int CmdFDXBdemodBI(const char *Cmd){
871
872 int invert = 1;
873 int clk = 32;
874 int errCnt = 0;
875 int maxErr = 0;
876 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
877 size_t size = getFromGraphBuf(BitStream);
878
879 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
880 if ( errCnt < 0 || errCnt > maxErr ) {
881 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
882 return 0;
883 }
884
885 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
886 if (errCnt < 0 || errCnt > maxErr ) {
887 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
888 return 0;
889 }
890
891 int preambleIndex = FDXBdemodBI(BitStream, &size);
892 if (preambleIndex < 0){
893 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
894 return 0;
895 }
896 if (size != 128) {
897 if (g_debugMode) PrintAndLog("Error incorrect data length found");
898 return 0;
899 }
900
901 setDemodBuf(BitStream, 128, preambleIndex);
902
903 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
904 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
905 if ( size != 104 ) {
906 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
907 return 0;
908 }
909 if (g_debugMode) {
910 char *bin = sprint_bin_break(BitStream,size,16);
911 PrintAndLog("DEBUG BinStream:\n%s",bin);
912 }
913 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
914 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
915
916 //got a good demod
917 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
918 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
919 uint8_t dataBlockBit = BitStream[48];
920 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
921 uint8_t animalBit = BitStream[63];
922 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
923 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
924
925 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
926 uint8_t raw[8];
927 num_to_bytes(rawid, 8, raw);
928
929 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
930
931 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
932 PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode);
933 PrintAndLog("National Code: %012" PRIu64, NationalCode);
934 PrintAndLog("CountryCode: %04u", countryCode);
935 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
936 PrintAndLog("reserved Code: %u", reservedCode);
937 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
938 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
939 PrintAndLog("Extended: 0x%X\n", extended);
940
941 return 1;
942 }
943
944
945 //by marshmellow
946 //attempt to psk1 demod graph buffer
947 int PSKDemod(const char *Cmd, bool verbose)
948 {
949 int invert=0;
950 int clk=0;
951 int maxErr=100;
952 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
953 if (clk==1){
954 invert=1;
955 clk=0;
956 }
957 if (invert != 0 && invert != 1) {
958 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
959 return 0;
960 }
961 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
962 size_t BitLen = getFromGraphBuf(BitStream);
963 if (BitLen==0) return 0;
964 uint8_t carrier=countFC(BitStream, BitLen, 0);
965 if (carrier!=2 && carrier!=4 && carrier!=8){
966 //invalid carrier
967 return 0;
968 }
969 if (g_debugMode){
970 PrintAndLog("Carrier: rf/%d",carrier);
971 }
972 int errCnt=0;
973 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
974 if (errCnt > maxErr){
975 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
976 return 0;
977 }
978 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
979 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
980 return 0;
981 }
982 if (verbose || g_debugMode){
983 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
984 if (errCnt>0){
985 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
986 }
987 }
988 //prime demod buffer for output
989 setDemodBuf(BitStream,BitLen,0);
990 return 1;
991 }
992
993 int CmdPSKNexWatch(const char *Cmd)
994 {
995 if (!PSKDemod("", false)) return 0;
996 uint8_t preamble[28] = {0,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
997 size_t startIdx = 0, size = DemodBufferLen;
998 bool invert = false;
999 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1000 // if didn't find preamble try again inverting
1001 if (!PSKDemod("1", false)) return 0;
1002 size = DemodBufferLen;
1003 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1004 invert = true;
1005 }
1006 if (size != 128) return 0;
1007 setDemodBuf(DemodBuffer, size, startIdx+4);
1008 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1009 //get ID
1010 uint32_t ID = 0;
1011 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1012 for (uint8_t idx=0; idx<8; idx++){
1013 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1014 }
1015 }
1016 //parity check (TBD)
1017
1018 //checksum check (TBD)
1019
1020 //output
1021 PrintAndLog("NexWatch ID: %d", ID);
1022 if (invert){
1023 PrintAndLog("Had to Invert - probably NexKey");
1024 for (uint8_t idx=0; idx<size; idx++)
1025 DemodBuffer[idx] ^= 1;
1026 }
1027
1028 CmdPrintDemodBuff("x");
1029 return 1;
1030 }
1031
1032 // by marshmellow
1033 // takes 3 arguments - clock, invert, maxErr as integers
1034 // attempts to demodulate nrz only
1035 // prints binary found and saves in demodbuffer for further commands
1036 int NRZrawDemod(const char *Cmd, bool verbose)
1037 {
1038 int invert=0;
1039 int clk=0;
1040 int maxErr=100;
1041 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1042 if (clk==1){
1043 invert=1;
1044 clk=0;
1045 }
1046 if (invert != 0 && invert != 1) {
1047 PrintAndLog("Invalid argument: %s", Cmd);
1048 return 0;
1049 }
1050 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1051 size_t BitLen = getFromGraphBuf(BitStream);
1052 if (BitLen==0) return 0;
1053 int errCnt=0;
1054 int clkStartIdx = 0;
1055 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
1056 if (errCnt > maxErr){
1057 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1058 return 0;
1059 }
1060 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1061 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1062 return 0;
1063 }
1064 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1065 //prime demod buffer for output
1066 setDemodBuf(BitStream,BitLen,0);
1067
1068 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1069 if (verbose || g_debugMode) {
1070 PrintAndLog("NRZ demoded bitstream:");
1071 // Now output the bitstream to the scrollback by line of 16 bits
1072 printDemodBuff();
1073 }
1074 return 1;
1075 }
1076
1077 int CmdNRZrawDemod(const char *Cmd)
1078 {
1079 char cmdp = param_getchar(Cmd, 0);
1080 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1081 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1082 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1083 PrintAndLog(" <invert>, 1 for invert output");
1084 PrintAndLog(" [set maximum allowed errors], default = 100.");
1085 PrintAndLog("");
1086 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1087 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1088 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1089 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1090 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");
1091 return 0;
1092 }
1093 return NRZrawDemod(Cmd, true);
1094 }
1095
1096 // by marshmellow
1097 // takes 3 arguments - clock, invert, maxErr as integers
1098 // attempts to demodulate psk only
1099 // prints binary found and saves in demodbuffer for further commands
1100 int CmdPSK1rawDemod(const char *Cmd)
1101 {
1102 int ans;
1103 char cmdp = param_getchar(Cmd, 0);
1104 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1105 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1106 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1107 PrintAndLog(" <invert>, 1 for invert output");
1108 PrintAndLog(" [set maximum allowed errors], default = 100.");
1109 PrintAndLog("");
1110 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1111 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1112 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1113 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1114 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");
1115 return 0;
1116 }
1117 ans = PSKDemod(Cmd, true);
1118 //output
1119 if (!ans){
1120 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1121 return 0;
1122 }
1123
1124 PrintAndLog("PSK1 demoded bitstream:");
1125 // Now output the bitstream to the scrollback by line of 16 bits
1126 printDemodBuff();
1127 return 1;
1128 }
1129
1130 // by marshmellow
1131 // takes same args as cmdpsk1rawdemod
1132 int CmdPSK2rawDemod(const char *Cmd)
1133 {
1134 int ans=0;
1135 char cmdp = param_getchar(Cmd, 0);
1136 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1137 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1138 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1139 PrintAndLog(" <invert>, 1 for invert output");
1140 PrintAndLog(" [set maximum allowed errors], default = 100.");
1141 PrintAndLog("");
1142 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1143 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1144 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1145 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1146 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");
1147 return 0;
1148 }
1149 ans=PSKDemod(Cmd, true);
1150 if (!ans){
1151 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1152 return 0;
1153 }
1154 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1155 PrintAndLog("PSK2 demoded bitstream:");
1156 // Now output the bitstream to the scrollback by line of 16 bits
1157 printDemodBuff();
1158 return 1;
1159 }
1160
1161 // by marshmellow - combines all raw demod functions into one menu command
1162 int CmdRawDemod(const char *Cmd)
1163 {
1164 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1165
1166 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1167 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1168 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1169 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1170 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1171 PrintAndLog(" <options> see specific modulation help for optional parameters");
1172 PrintAndLog("");
1173 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1174 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1175 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1176 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1177 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1178 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1179 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1180 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1181 return 0;
1182 }
1183 char cmdp2 = Cmd[1];
1184 int ans = 0;
1185 if (cmdp == 'f' && cmdp2 == 's'){
1186 ans = CmdFSKrawdemod(Cmd+2);
1187 } else if(cmdp == 'a' && cmdp2 == 'b'){
1188 ans = Cmdaskbiphdemod(Cmd+2);
1189 } else if(cmdp == 'a' && cmdp2 == 'm'){
1190 ans = Cmdaskmandemod(Cmd+2);
1191 } else if(cmdp == 'a' && cmdp2 == 'r'){
1192 ans = Cmdaskrawdemod(Cmd+2);
1193 } else if(cmdp == 'n' && cmdp2 == 'r'){
1194 ans = CmdNRZrawDemod(Cmd+2);
1195 } else if(cmdp == 'p' && cmdp2 == '1'){
1196 ans = CmdPSK1rawDemod(Cmd+2);
1197 } else if(cmdp == 'p' && cmdp2 == '2'){
1198 ans = CmdPSK2rawDemod(Cmd+2);
1199 } else {
1200 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1201 }
1202 return ans;
1203 }
1204
1205 int CmdGrid(const char *Cmd)
1206 {
1207 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1208 PlotGridXdefault= PlotGridX;
1209 PlotGridYdefault= PlotGridY;
1210 RepaintGraphWindow();
1211 return 0;
1212 }
1213
1214 int CmdSetGraphMarkers(const char *Cmd) {
1215 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1216 RepaintGraphWindow();
1217 return 0;
1218 }
1219
1220 int CmdHexsamples(const char *Cmd)
1221 {
1222 int i, j;
1223 int requested = 0;
1224 int offset = 0;
1225 char string_buf[25];
1226 char* string_ptr = string_buf;
1227 uint8_t got[BIGBUF_SIZE];
1228
1229 sscanf(Cmd, "%i %i", &requested, &offset);
1230
1231 /* if no args send something */
1232 if (requested == 0) {
1233 requested = 8;
1234 }
1235 if (offset + requested > sizeof(got)) {
1236 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1237 return 0;
1238 }
1239
1240 GetFromBigBuf(got,requested,offset);
1241 WaitForResponse(CMD_ACK,NULL);
1242
1243 i = 0;
1244 for (j = 0; j < requested; j++) {
1245 i++;
1246 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1247 if (i == 8) {
1248 *(string_ptr - 1) = '\0'; // remove the trailing space
1249 PrintAndLog("%s", string_buf);
1250 string_buf[0] = '\0';
1251 string_ptr = string_buf;
1252 i = 0;
1253 }
1254 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1255 *(string_ptr - 1) = '\0';
1256 PrintAndLog("%s", string_buf);
1257 string_buf[0] = '\0';
1258 }
1259 }
1260 return 0;
1261 }
1262
1263 int CmdHide(const char *Cmd)
1264 {
1265 HideGraphWindow();
1266 return 0;
1267 }
1268
1269 //zero mean GraphBuffer
1270 int CmdHpf(const char *Cmd)
1271 {
1272 int i;
1273 int accum = 0;
1274
1275 for (i = 10; i < GraphTraceLen; ++i)
1276 accum += GraphBuffer[i];
1277 accum /= (GraphTraceLen - 10);
1278 for (i = 0; i < GraphTraceLen; ++i)
1279 GraphBuffer[i] -= accum;
1280
1281 RepaintGraphWindow();
1282 return 0;
1283 }
1284
1285 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1286 {
1287 int i;
1288 uint8_t val = 0;
1289 for(i =0 ; i < bits_per_sample; i++)
1290 {
1291 val |= (headBit(b) << (7-i));
1292 }
1293 return val;
1294 }
1295
1296 int getSamples(const char *Cmd, bool silent)
1297 {
1298 //If we get all but the last byte in bigbuf,
1299 // we don't have to worry about remaining trash
1300 // in the last byte in case the bits-per-sample
1301 // does not line up on byte boundaries
1302
1303 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1304
1305 int n = strtol(Cmd, NULL, 0);
1306
1307 if (n == 0 || n > sizeof(got))
1308 n = sizeof(got);
1309
1310 PrintAndLog("Reading %d bytes from device memory\n", n);
1311 GetFromBigBuf(got,n,0);
1312 PrintAndLog("Data fetched");
1313 UsbCommand response;
1314 WaitForResponse(CMD_ACK, &response);
1315 uint8_t bits_per_sample = 8;
1316
1317 //Old devices without this feature would send 0 at arg[0]
1318 if(response.arg[0] > 0)
1319 {
1320 sample_config *sc = (sample_config *) response.d.asBytes;
1321 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1322 , sc->decimation);
1323 bits_per_sample = sc->bits_per_sample;
1324 }
1325 if(bits_per_sample < 8)
1326 {
1327 PrintAndLog("Unpacking...");
1328 BitstreamIn bout = { got, bits_per_sample * n, 0};
1329 int j =0;
1330 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1331 uint8_t sample = getByte(bits_per_sample, &bout);
1332 GraphBuffer[j] = ((int) sample )- 128;
1333 }
1334 GraphTraceLen = j;
1335 PrintAndLog("Unpacked %d samples" , j );
1336 }else
1337 {
1338 for (int j = 0; j < n; j++) {
1339 GraphBuffer[j] = ((int)got[j]) - 128;
1340 }
1341 GraphTraceLen = n;
1342 }
1343
1344 RepaintGraphWindow();
1345 return 0;
1346 }
1347
1348 int CmdSamples(const char *Cmd)
1349 {
1350 return getSamples(Cmd, false);
1351 }
1352
1353 int CmdTuneSamples(const char *Cmd)
1354 {
1355 int timeout = 0, arg = FLAG_TUNE_ALL;
1356
1357 if(*Cmd == 'l') {
1358 arg = FLAG_TUNE_LF;
1359 } else if (*Cmd == 'h') {
1360 arg = FLAG_TUNE_HF;
1361 } else if (*Cmd != '\0') {
1362 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1363 return 0;
1364 }
1365
1366 printf("\nMeasuring antenna characteristics, please wait...");
1367
1368 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1369 SendCommand(&c);
1370
1371 UsbCommand resp;
1372 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1373 timeout++;
1374 printf(".");
1375 if (timeout > 7) {
1376 PrintAndLog("\nNo response from Proxmark. Aborting...");
1377 return 1;
1378 }
1379 }
1380
1381 int peakv, peakf;
1382 int vLf125, vLf134, vHf;
1383 vLf125 = resp.arg[0] & 0xffff;
1384 vLf134 = resp.arg[0] >> 16;
1385 vHf = resp.arg[1] & 0xffff;;
1386 peakf = resp.arg[2] & 0xffff;
1387 peakv = resp.arg[2] >> 16;
1388 PrintAndLog("");
1389 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1390 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1391 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1392 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1393
1394 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1395 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1396 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1397 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1398
1399 if (peakv < LF_UNUSABLE_V)
1400 PrintAndLog("# Your LF antenna is unusable.");
1401 else if (peakv < LF_MARGINAL_V)
1402 PrintAndLog("# Your LF antenna is marginal.");
1403 if (vHf < HF_UNUSABLE_V)
1404 PrintAndLog("# Your HF antenna is unusable.");
1405 else if (vHf < HF_MARGINAL_V)
1406 PrintAndLog("# Your HF antenna is marginal.");
1407
1408 if (peakv >= LF_UNUSABLE_V) {
1409 for (int i = 0; i < 256; i++) {
1410 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1411 }
1412 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1413 PrintAndLog("\n");
1414 GraphTraceLen = 256;
1415 ShowGraphWindow();
1416 RepaintGraphWindow();
1417 }
1418
1419 return 0;
1420 }
1421
1422
1423 int CmdLoad(const char *Cmd)
1424 {
1425 char filename[FILE_PATH_SIZE] = {0x00};
1426 int len = 0;
1427
1428 len = strlen(Cmd);
1429 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1430 memcpy(filename, Cmd, len);
1431
1432 FILE *f = fopen(filename, "r");
1433 if (!f) {
1434 PrintAndLog("couldn't open '%s'", filename);
1435 return 0;
1436 }
1437
1438 GraphTraceLen = 0;
1439 char line[80];
1440 while (fgets(line, sizeof (line), f)) {
1441 GraphBuffer[GraphTraceLen] = atoi(line);
1442 GraphTraceLen++;
1443 }
1444 fclose(f);
1445 PrintAndLog("loaded %d samples", GraphTraceLen);
1446 RepaintGraphWindow();
1447 return 0;
1448 }
1449
1450 int CmdLtrim(const char *Cmd)
1451 {
1452 int ds = atoi(Cmd);
1453 if (GraphTraceLen<=0) return 0;
1454 for (int i = ds; i < GraphTraceLen; ++i)
1455 GraphBuffer[i-ds] = GraphBuffer[i];
1456 GraphTraceLen -= ds;
1457
1458 RepaintGraphWindow();
1459 return 0;
1460 }
1461
1462 // trim graph to input argument length
1463 int CmdRtrim(const char *Cmd)
1464 {
1465 int ds = atoi(Cmd);
1466
1467 GraphTraceLen = ds;
1468
1469 RepaintGraphWindow();
1470 return 0;
1471 }
1472
1473 // trim graph (middle) piece
1474 int CmdMtrim(const char *Cmd) {
1475 int start = 0, stop = 0;
1476 sscanf(Cmd, "%i %i", &start, &stop);
1477
1478 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1479 start++; //leave start position sample
1480
1481 GraphTraceLen -= stop - start;
1482 for (int i = 0; i < GraphTraceLen; i++) {
1483 GraphBuffer[start+i] = GraphBuffer[stop+i];
1484 }
1485 return 0;
1486 }
1487
1488
1489 int CmdNorm(const char *Cmd)
1490 {
1491 int i;
1492 int max = INT_MIN, min = INT_MAX;
1493
1494 for (i = 10; i < GraphTraceLen; ++i) {
1495 if (GraphBuffer[i] > max)
1496 max = GraphBuffer[i];
1497 if (GraphBuffer[i] < min)
1498 min = GraphBuffer[i];
1499 }
1500
1501 if (max != min) {
1502 for (i = 0; i < GraphTraceLen; ++i) {
1503 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
1504 (max - min);
1505 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
1506 }
1507 }
1508 RepaintGraphWindow();
1509 return 0;
1510 }
1511
1512 int CmdPlot(const char *Cmd)
1513 {
1514 ShowGraphWindow();
1515 return 0;
1516 }
1517
1518 int CmdSave(const char *Cmd)
1519 {
1520 char filename[FILE_PATH_SIZE] = {0x00};
1521 int len = 0;
1522
1523 len = strlen(Cmd);
1524 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1525 memcpy(filename, Cmd, len);
1526
1527
1528 FILE *f = fopen(filename, "w");
1529 if(!f) {
1530 PrintAndLog("couldn't open '%s'", filename);
1531 return 0;
1532 }
1533 int i;
1534 for (i = 0; i < GraphTraceLen; i++) {
1535 fprintf(f, "%d\n", GraphBuffer[i]);
1536 }
1537 fclose(f);
1538 PrintAndLog("saved to '%s'", Cmd);
1539 return 0;
1540 }
1541
1542 int CmdScale(const char *Cmd)
1543 {
1544 CursorScaleFactor = atoi(Cmd);
1545 if (CursorScaleFactor == 0) {
1546 PrintAndLog("bad, can't have zero scale");
1547 CursorScaleFactor = 1;
1548 }
1549 RepaintGraphWindow();
1550 return 0;
1551 }
1552
1553 int CmdDirectionalThreshold(const char *Cmd)
1554 {
1555 int8_t upThres = param_get8(Cmd, 0);
1556 int8_t downThres = param_get8(Cmd, 1);
1557
1558 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1559
1560 int lastValue = GraphBuffer[0];
1561 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1562
1563 for (int i = 1; i < GraphTraceLen; ++i) {
1564 // Apply first threshold to samples heading up
1565 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
1566 {
1567 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1568 GraphBuffer[i] = 127;
1569 }
1570 // Apply second threshold to samples heading down
1571 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
1572 {
1573 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1574 GraphBuffer[i] = -127;
1575 }
1576 else
1577 {
1578 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1579 GraphBuffer[i] = GraphBuffer[i-1];
1580
1581 }
1582 }
1583 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
1584 RepaintGraphWindow();
1585 return 0;
1586 }
1587
1588 int CmdZerocrossings(const char *Cmd)
1589 {
1590 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1591 CmdHpf("");
1592
1593 int sign = 1;
1594 int zc = 0;
1595 int lastZc = 0;
1596
1597 for (int i = 0; i < GraphTraceLen; ++i) {
1598 if (GraphBuffer[i] * sign >= 0) {
1599 // No change in sign, reproduce the previous sample count.
1600 zc++;
1601 GraphBuffer[i] = lastZc;
1602 } else {
1603 // Change in sign, reset the sample count.
1604 sign = -sign;
1605 GraphBuffer[i] = lastZc;
1606 if (sign > 0) {
1607 lastZc = zc;
1608 zc = 0;
1609 }
1610 }
1611 }
1612
1613 RepaintGraphWindow();
1614 return 0;
1615 }
1616
1617 int usage_data_bin2hex(){
1618 PrintAndLog("Usage: data bin2hex <binary_digits>");
1619 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1620 return 0;
1621 }
1622
1623 /**
1624 * @brief Utility for conversion via cmdline.
1625 * @param Cmd
1626 * @return
1627 */
1628 int Cmdbin2hex(const char *Cmd)
1629 {
1630 int bg =0, en =0;
1631 if(param_getptr(Cmd, &bg, &en, 0))
1632 {
1633 return usage_data_bin2hex();
1634 }
1635 //Number of digits supplied as argument
1636 size_t length = en - bg +1;
1637 size_t bytelen = (length+7) / 8;
1638 uint8_t* arr = (uint8_t *) malloc(bytelen);
1639 memset(arr, 0, bytelen);
1640 BitstreamOut bout = { arr, 0, 0 };
1641
1642 for(; bg <= en ;bg++)
1643 {
1644 char c = Cmd[bg];
1645 if( c == '1') pushBit(&bout, 1);
1646 else if( c == '0') pushBit(&bout, 0);
1647 else PrintAndLog("Ignoring '%c'", c);
1648 }
1649
1650 if(bout.numbits % 8 != 0)
1651 {
1652 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1653 }
1654
1655 //Uses printf instead of PrintAndLog since the latter
1656 // adds linebreaks to each printout - this way was more convenient since we don't have to
1657 // allocate a string and write to that first...
1658 for(size_t x = 0; x < bytelen ; x++)
1659 {
1660 printf("%02X", arr[x]);
1661 }
1662 printf("\n");
1663 free(arr);
1664 return 0;
1665 }
1666
1667 int usage_data_hex2bin() {
1668 PrintAndLog("Usage: data hex2bin <hex_digits>");
1669 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1670 return 0;
1671
1672 }
1673
1674 int Cmdhex2bin(const char *Cmd)
1675 {
1676 int bg =0, en =0;
1677 if(param_getptr(Cmd, &bg, &en, 0))
1678 {
1679 return usage_data_hex2bin();
1680 }
1681
1682
1683 while(bg <= en )
1684 {
1685 char x = Cmd[bg++];
1686 // capitalize
1687 if (x >= 'a' && x <= 'f')
1688 x -= 32;
1689 // convert to numeric value
1690 if (x >= '0' && x <= '9')
1691 x -= '0';
1692 else if (x >= 'A' && x <= 'F')
1693 x -= 'A' - 10;
1694 else
1695 continue;
1696
1697 //Uses printf instead of PrintAndLog since the latter
1698 // adds linebreaks to each printout - this way was more convenient since we don't have to
1699 // allocate a string and write to that first...
1700
1701 for(int i= 0 ; i < 4 ; ++i)
1702 printf("%d",(x >> (3 - i)) & 1);
1703 }
1704 printf("\n");
1705
1706 return 0;
1707 }
1708
1709 static command_t CommandTable[] =
1710 {
1711 {"help", CmdHelp, 1, "This help"},
1712 {"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)"},
1713 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
1714 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
1715 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
1716 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1717 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1718 {"dec", CmdDec, 1, "Decimate samples"},
1719 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
1720 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
1721 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
1722 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
1723 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1724 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1725 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1726 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
1727 {"hide", CmdHide, 1, "Hide graph window"},
1728 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1729 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1730 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1731 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1732 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
1733 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
1734 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1735 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1736 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
1737 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
1738 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1739 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1740 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1741 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
1742 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1743 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
1744 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
1745 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1746 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1747 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1748 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1749 {NULL, NULL, 0, NULL}
1750 };
1751
1752 int CmdData(const char *Cmd)
1753 {
1754 CmdsParse(CommandTable, Cmd);
1755 return 0;
1756 }
1757
1758 int CmdHelp(const char *Cmd)
1759 {
1760 CmdsHelp(CommandTable);
1761 return 0;
1762 }
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