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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 //could be split to a gProxII file
448 //by marshmellow
449 //attempts to demodulate and identify a G_Prox_II verex/chubb card
450 //WARNING: if it fails during some points it will destroy the DemodBuffer data
451 // but will leave the GraphBuffer intact.
452 //if successful it will push askraw data back to demod buffer ready for emulation
453 int CmdG_Prox_II_Demod(const char *Cmd)
454 {
455 if (!ASKbiphaseDemod(Cmd, false)){
456 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
457 return 0;
458 }
459 size_t size = DemodBufferLen;
460 //call lfdemod.c demod for gProxII
461 int ans = gProxII_Demod(DemodBuffer, &size);
462 if (ans < 0){
463 if (g_debugMode) PrintAndLog("Error gProxII_Demod");
464 return 0;
465 }
466 //got a good demod of 96 bits
467 uint8_t ByteStream[8] = {0x00};
468 uint8_t xorKey=0;
469 size_t startIdx = ans + 6; //start after 6 bit preamble
470
471 uint8_t bits_no_spacer[90];
472 //so as to not mess with raw DemodBuffer copy to a new sample array
473 memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
474 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
475 size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
476 if (bitLen != 72) {
477 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
478 return 0;
479 }
480 // get key and then get all 8 bytes of payload decoded
481 xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
482 for (size_t idx = 0; idx < 8; idx++) {
483 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
484 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
485 }
486 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
487 //
488 uint8_t fmtLen = ByteStream[0]>>2;
489 uint32_t FC = 0;
490 uint32_t Card = 0;
491 //get raw 96 bits to print
492 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
493 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
494 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
495
496 if (fmtLen==36){
497 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
498 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
499 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
500 } else if(fmtLen==26){
501 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
502 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
503 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
504 } else {
505 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
506 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
507 }
508 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
509 setDemodBuf(DemodBuffer+ans, 96, 0);
510 return 1;
511 }
512
513 //by marshmellow - see ASKDemod
514 int Cmdaskrawdemod(const char *Cmd)
515 {
516 char cmdp = param_getchar(Cmd, 0);
517 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
518 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
519 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
520 PrintAndLog(" <invert>, 1 to invert output");
521 PrintAndLog(" [set maximum allowed errors], default = 100");
522 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
523 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
524 PrintAndLog("");
525 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
526 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
527 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
528 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
529 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
530 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");
531 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");
532 return 0;
533 }
534 return ASKDemod(Cmd, true, false, 0);
535 }
536
537 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
538 {
539 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
540 size_t Correlation = 0;
541 int maxSum = 0;
542 int lastMax = 0;
543 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
544 for (int i = 0; i < GraphTraceLen - window; ++i) {
545 int sum = 0;
546 for (int j = 0; j < window; ++j) {
547 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
548 }
549 CorrelBuffer[i] = sum;
550 if (sum >= maxSum-100 && sum <= maxSum+100){
551 //another max
552 Correlation = i-lastMax;
553 lastMax = i;
554 if (sum > maxSum) maxSum = sum;
555 } else if (sum > maxSum){
556 maxSum=sum;
557 lastMax = i;
558 }
559 }
560 if (Correlation==0){
561 //try again with wider margin
562 for (int i = 0; i < GraphTraceLen - window; i++){
563 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
564 //another max
565 Correlation = i-lastMax;
566 lastMax = i;
567 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
568 }
569 }
570 }
571 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
572
573 if (SaveGrph){
574 GraphTraceLen = GraphTraceLen - window;
575 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
576 RepaintGraphWindow();
577 }
578 return Correlation;
579 }
580
581 int usage_data_autocorr(void)
582 {
583 //print help
584 PrintAndLog("Usage: data autocorr [window] [g]");
585 PrintAndLog("Options: ");
586 PrintAndLog(" h This help");
587 PrintAndLog(" [window] window length for correlation - default = 4000");
588 PrintAndLog(" g save back to GraphBuffer (overwrite)");
589 return 0;
590 }
591
592 int CmdAutoCorr(const char *Cmd)
593 {
594 char cmdp = param_getchar(Cmd, 0);
595 if (cmdp == 'h' || cmdp == 'H')
596 return usage_data_autocorr();
597 int window = 4000; //set default
598 char grph=0;
599 bool updateGrph = false;
600 sscanf(Cmd, "%i %c", &window, &grph);
601
602 if (window >= GraphTraceLen) {
603 PrintAndLog("window must be smaller than trace (%d samples)",
604 GraphTraceLen);
605 return 0;
606 }
607 if (grph == 'g') updateGrph=true;
608 return AutoCorrelate(window, updateGrph, true);
609 }
610
611 int CmdBitsamples(const char *Cmd)
612 {
613 int cnt = 0;
614 uint8_t got[12288];
615
616 GetFromBigBuf(got,sizeof(got),0);
617 WaitForResponse(CMD_ACK,NULL);
618
619 for (int j = 0; j < sizeof(got); j++) {
620 for (int k = 0; k < 8; k++) {
621 if(got[j] & (1 << (7 - k))) {
622 GraphBuffer[cnt++] = 1;
623 } else {
624 GraphBuffer[cnt++] = 0;
625 }
626 }
627 }
628 GraphTraceLen = cnt;
629 RepaintGraphWindow();
630 return 0;
631 }
632
633 int CmdBuffClear(const char *Cmd)
634 {
635 UsbCommand c = {CMD_BUFF_CLEAR};
636 SendCommand(&c);
637 ClearGraph(true);
638 return 0;
639 }
640
641 int CmdDec(const char *Cmd)
642 {
643 for (int i = 0; i < (GraphTraceLen / 2); ++i)
644 GraphBuffer[i] = GraphBuffer[i * 2];
645 GraphTraceLen /= 2;
646 PrintAndLog("decimated by 2");
647 RepaintGraphWindow();
648 return 0;
649 }
650 /**
651 * Undecimate - I'd call it 'interpolate', but we'll save that
652 * name until someone does an actual interpolation command, not just
653 * blindly repeating samples
654 * @param Cmd
655 * @return
656 */
657 int CmdUndec(const char *Cmd)
658 {
659 if(param_getchar(Cmd, 0) == 'h')
660 {
661 PrintAndLog("Usage: data undec [factor]");
662 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
663 PrintAndLog("Options: ");
664 PrintAndLog(" h This help");
665 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
666 PrintAndLog("Example: 'data undec 3'");
667 return 0;
668 }
669
670 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
671 //We have memory, don't we?
672 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
673 uint32_t g_index = 0, s_index = 0;
674 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
675 {
676 int count = 0;
677 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
678 swap[s_index+count] = GraphBuffer[g_index];
679
680 s_index += count;
681 g_index++;
682 }
683
684 memcpy(GraphBuffer, swap, s_index * sizeof(int));
685 GraphTraceLen = s_index;
686 RepaintGraphWindow();
687 return 0;
688 }
689
690 //by marshmellow
691 //shift graph zero up or down based on input + or -
692 int CmdGraphShiftZero(const char *Cmd)
693 {
694
695 int shift=0;
696 //set options from parameters entered with the command
697 sscanf(Cmd, "%i", &shift);
698 int shiftedVal=0;
699 for(int i = 0; i<GraphTraceLen; i++){
700 shiftedVal=GraphBuffer[i]+shift;
701 if (shiftedVal>127)
702 shiftedVal=127;
703 else if (shiftedVal<-127)
704 shiftedVal=-127;
705 GraphBuffer[i]= shiftedVal;
706 }
707 CmdNorm("");
708 return 0;
709 }
710
711 //by marshmellow
712 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
713 //similar to dirtheshold, threshold commands
714 //takes a threshold length which is the measured length between two samples then determines an edge
715 int CmdAskEdgeDetect(const char *Cmd)
716 {
717 int thresLen = 25;
718 int Last = 0;
719 sscanf(Cmd, "%i", &thresLen);
720
721 for(int i = 1; i<GraphTraceLen; i++){
722 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
723 Last = 127;
724 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
725 Last = -127;
726 GraphBuffer[i-1] = Last;
727 }
728 RepaintGraphWindow();
729 return 0;
730 }
731
732 /* Print our clock rate */
733 // uses data from graphbuffer
734 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
735 int CmdDetectClockRate(const char *Cmd)
736 {
737 char cmdp = param_getchar(Cmd, 0);
738 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
739 PrintAndLog("Usage: data detectclock [modulation] <clock>");
740 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
741 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
742 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
743 PrintAndLog("");
744 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
745 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
746 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
747 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
748 }
749 int ans=0;
750 if (cmdp == 'a'){
751 ans = GetAskClock(Cmd+1, true, false);
752 } else if (cmdp == 'f'){
753 ans = GetFskClock("", true, false);
754 } else if (cmdp == 'n'){
755 ans = GetNrzClock("", true, false);
756 } else if (cmdp == 'p'){
757 ans = GetPskClock("", true, false);
758 } else {
759 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
760 }
761 return ans;
762 }
763
764 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
765 {
766 static char fType[8];
767 memset(fType, 0x00, 8);
768 char *fskType = fType;
769 if (fchigh==10 && fclow==8){
770 if (invert) //fsk2a
771 memcpy(fskType, "FSK2a", 5);
772 else //fsk2
773 memcpy(fskType, "FSK2", 4);
774 } else if (fchigh == 8 && fclow == 5) {
775 if (invert)
776 memcpy(fskType, "FSK1", 4);
777 else
778 memcpy(fskType, "FSK1a", 5);
779 } else {
780 memcpy(fskType, "FSK??", 5);
781 }
782 return fskType;
783 }
784
785 //by marshmellow
786 //fsk raw demod and print binary
787 //takes 4 arguments - Clock, invert, fchigh, fclow
788 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
789 int FSKrawDemod(const char *Cmd, bool verbose)
790 {
791 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
792 uint8_t rfLen, invert, fchigh, fclow;
793 //set defaults
794 //set options from parameters entered with the command
795 rfLen = param_get8(Cmd, 0);
796 invert = param_get8(Cmd, 1);
797 fchigh = param_get8(Cmd, 2);
798 fclow = param_get8(Cmd, 3);
799
800 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
801 if (rfLen==1) {
802 invert = 1; //if invert option only is used
803 rfLen = 0;
804 }
805 }
806 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
807 size_t BitLen = getFromGraphBuf(BitStream);
808 if (BitLen==0) return 0;
809 //get field clock lengths
810 uint16_t fcs=0;
811 if (!fchigh || !fclow) {
812 fcs = countFC(BitStream, BitLen, 1);
813 if (!fcs) {
814 fchigh = 10;
815 fclow = 8;
816 } else {
817 fchigh = (fcs >> 8) & 0x00FF;
818 fclow = fcs & 0x00FF;
819 }
820 }
821 //get bit clock length
822 if (!rfLen) {
823 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
824 if (!rfLen) rfLen = 50;
825 }
826 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
827 if (size > 0) {
828 setDemodBuf(BitStream,size,0);
829
830 // Now output the bitstream to the scrollback by line of 16 bits
831 if (verbose || g_debugMode) {
832 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
833 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
834 printDemodBuff();
835 }
836
837 return 1;
838 } else {
839 if (g_debugMode) PrintAndLog("no FSK data found");
840 }
841 return 0;
842 }
843
844 //by marshmellow
845 //fsk raw demod and print binary
846 //takes 4 arguments - Clock, invert, fchigh, fclow
847 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
848 int CmdFSKrawdemod(const char *Cmd)
849 {
850 char cmdp = param_getchar(Cmd, 0);
851 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
852 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
853 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
854 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
855 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
856 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
857 PrintAndLog("");
858 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
859 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
860 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
861 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
862 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
863 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
864 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
865 return 0;
866 }
867 return FSKrawDemod(Cmd, true);
868 }
869
870 //by marshmellow
871 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
872 //print full Paradox Prox ID and some bit format details if found
873 int CmdFSKdemodParadox(const char *Cmd)
874 {
875 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
876 uint32_t hi2=0, hi=0, lo=0;
877
878 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
879 size_t BitLen = getFromGraphBuf(BitStream);
880 if (BitLen==0) return 0;
881 //get binary from fsk wave
882 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
883 if (idx<0){
884 if (g_debugMode){
885 if (idx==-1){
886 PrintAndLog("DEBUG: Just Noise Detected");
887 } else if (idx == -2) {
888 PrintAndLog("DEBUG: Error demoding fsk");
889 } else if (idx == -3) {
890 PrintAndLog("DEBUG: Preamble not found");
891 } else if (idx == -4) {
892 PrintAndLog("DEBUG: Error in Manchester data");
893 } else {
894 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
895 }
896 }
897 return 0;
898 }
899 if (hi2==0 && hi==0 && lo==0){
900 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
901 return 0;
902 }
903 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
904 uint32_t cardnum = (lo>>10)&0xFFFF;
905 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
906 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
907 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
908
909 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
910 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
911 setDemodBuf(BitStream,BitLen,idx);
912 if (g_debugMode){
913 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
914 printDemodBuff();
915 }
916 return 1;
917 }
918
919 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
920 // 8 databits + 1 parity (1)
921 // CIITT 16 chksum
922 // NATIONAL CODE, ICAR database
923 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
924 // FLAG (animal/non-animal)
925 /*
926 38 IDbits
927 10 country code
928 1 extra app bit
929 14 reserved bits
930 1 animal bit
931 16 ccitt CRC chksum over 64bit ID CODE.
932 24 appli bits.
933
934 -- sample: 985121004515220 [ 37FF65B88EF94 ]
935 */
936 int CmdFDXBdemodBI(const char *Cmd){
937
938 int invert = 1;
939 int clk = 32;
940 int errCnt = 0;
941 int maxErr = 0;
942 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
943 size_t size = getFromGraphBuf(BitStream);
944
945 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
946 if ( errCnt < 0 || errCnt > maxErr ) {
947 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
948 return 0;
949 }
950
951 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
952 if (errCnt < 0 || errCnt > maxErr ) {
953 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
954 return 0;
955 }
956
957 int preambleIndex = FDXBdemodBI(BitStream, &size);
958 if (preambleIndex < 0){
959 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
960 return 0;
961 }
962 if (size != 128) {
963 if (g_debugMode) PrintAndLog("Error incorrect data length found");
964 return 0;
965 }
966
967 setDemodBuf(BitStream, 128, preambleIndex);
968
969 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
970 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
971 if ( size != 104 ) {
972 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
973 return 0;
974 }
975 if (g_debugMode) {
976 char *bin = sprint_bin_break(BitStream,size,16);
977 PrintAndLog("DEBUG BinStream:\n%s",bin);
978 }
979 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
980 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
981
982 //got a good demod
983 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
984 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
985 uint8_t dataBlockBit = BitStream[48];
986 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
987 uint8_t animalBit = BitStream[63];
988 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
989 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
990
991 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
992 uint8_t raw[8];
993 num_to_bytes(rawid, 8, raw);
994
995 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
996
997 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
998 PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode);
999 PrintAndLog("National Code: %012" PRIu64, NationalCode);
1000 PrintAndLog("CountryCode: %04u", countryCode);
1001 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1002 PrintAndLog("reserved Code: %u", reservedCode);
1003 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1004 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1005 PrintAndLog("Extended: 0x%X\n", extended);
1006
1007 return 1;
1008 }
1009
1010
1011 //by marshmellow
1012 //attempt to psk1 demod graph buffer
1013 int PSKDemod(const char *Cmd, bool verbose)
1014 {
1015 int invert=0;
1016 int clk=0;
1017 int maxErr=100;
1018 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1019 if (clk==1){
1020 invert=1;
1021 clk=0;
1022 }
1023 if (invert != 0 && invert != 1) {
1024 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1025 return 0;
1026 }
1027 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1028 size_t BitLen = getFromGraphBuf(BitStream);
1029 if (BitLen==0) return 0;
1030 uint8_t carrier=countFC(BitStream, BitLen, 0);
1031 if (carrier!=2 && carrier!=4 && carrier!=8){
1032 //invalid carrier
1033 return 0;
1034 }
1035 if (g_debugMode){
1036 PrintAndLog("Carrier: rf/%d",carrier);
1037 }
1038 int errCnt=0;
1039 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1040 if (errCnt > maxErr){
1041 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1042 return 0;
1043 }
1044 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1045 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1046 return 0;
1047 }
1048 if (verbose || g_debugMode){
1049 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1050 if (errCnt>0){
1051 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1052 }
1053 }
1054 //prime demod buffer for output
1055 setDemodBuf(BitStream,BitLen,0);
1056 return 1;
1057 }
1058
1059 // Indala 26 bit decode
1060 // by marshmellow
1061 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1062 int CmdIndalaDecode(const char *Cmd)
1063 {
1064 int ans;
1065 if (strlen(Cmd)>0){
1066 ans = PSKDemod(Cmd, 0);
1067 } else{ //default to RF/32
1068 ans = PSKDemod("32", 0);
1069 }
1070
1071 if (!ans){
1072 if (g_debugMode)
1073 PrintAndLog("Error1: %d",ans);
1074 return 0;
1075 }
1076 uint8_t invert=0;
1077 size_t size = DemodBufferLen;
1078 int startIdx = indala26decode(DemodBuffer, &size, &invert);
1079 if (startIdx < 0 || size > 224) {
1080 if (g_debugMode)
1081 PrintAndLog("Error2: %d",ans);
1082 return -1;
1083 }
1084 setDemodBuf(DemodBuffer, size, (size_t)startIdx);
1085 if (invert)
1086 if (g_debugMode)
1087 PrintAndLog("Had to invert bits");
1088
1089 PrintAndLog("BitLen: %d",DemodBufferLen);
1090 //convert UID to HEX
1091 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1092 uid1=bytebits_to_byte(DemodBuffer,32);
1093 uid2=bytebits_to_byte(DemodBuffer+32,32);
1094 if (DemodBufferLen==64) {
1095 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1096 } else {
1097 uid3=bytebits_to_byte(DemodBuffer+64,32);
1098 uid4=bytebits_to_byte(DemodBuffer+96,32);
1099 uid5=bytebits_to_byte(DemodBuffer+128,32);
1100 uid6=bytebits_to_byte(DemodBuffer+160,32);
1101 uid7=bytebits_to_byte(DemodBuffer+192,32);
1102 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1103 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1104 }
1105 if (g_debugMode){
1106 PrintAndLog("DEBUG: printing demodbuffer:");
1107 printDemodBuff();
1108 }
1109 return 1;
1110 }
1111
1112 int CmdPSKNexWatch(const char *Cmd)
1113 {
1114 if (!PSKDemod("", false)) return 0;
1115 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};
1116 size_t startIdx = 0, size = DemodBufferLen;
1117 bool invert = false;
1118 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1119 // if didn't find preamble try again inverting
1120 if (!PSKDemod("1", false)) return 0;
1121 size = DemodBufferLen;
1122 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1123 invert = true;
1124 }
1125 if (size != 128) return 0;
1126 setDemodBuf(DemodBuffer, size, startIdx+4);
1127 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1128 //get ID
1129 uint32_t ID = 0;
1130 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1131 for (uint8_t idx=0; idx<8; idx++){
1132 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1133 }
1134 }
1135 //parity check (TBD)
1136
1137 //checksum check (TBD)
1138
1139 //output
1140 PrintAndLog("NexWatch ID: %d", ID);
1141 if (invert){
1142 PrintAndLog("Had to Invert - probably NexKey");
1143 for (uint8_t idx=0; idx<size; idx++)
1144 DemodBuffer[idx] ^= 1;
1145 }
1146
1147 CmdPrintDemodBuff("x");
1148 return 1;
1149 }
1150
1151 // by marshmellow
1152 // takes 3 arguments - clock, invert, maxErr as integers
1153 // attempts to demodulate nrz only
1154 // prints binary found and saves in demodbuffer for further commands
1155 int NRZrawDemod(const char *Cmd, bool verbose)
1156 {
1157 int invert=0;
1158 int clk=0;
1159 int maxErr=100;
1160 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1161 if (clk==1){
1162 invert=1;
1163 clk=0;
1164 }
1165 if (invert != 0 && invert != 1) {
1166 PrintAndLog("Invalid argument: %s", Cmd);
1167 return 0;
1168 }
1169 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1170 size_t BitLen = getFromGraphBuf(BitStream);
1171 if (BitLen==0) return 0;
1172 int errCnt=0;
1173 int clkStartIdx = 0;
1174 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
1175 if (errCnt > maxErr){
1176 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1177 return 0;
1178 }
1179 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1180 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1181 return 0;
1182 }
1183 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1184 //prime demod buffer for output
1185 setDemodBuf(BitStream,BitLen,0);
1186
1187 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1188 if (verbose || g_debugMode) {
1189 PrintAndLog("NRZ demoded bitstream:");
1190 // Now output the bitstream to the scrollback by line of 16 bits
1191 printDemodBuff();
1192 }
1193 return 1;
1194 }
1195
1196 int CmdNRZrawDemod(const char *Cmd)
1197 {
1198 char cmdp = param_getchar(Cmd, 0);
1199 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1200 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1201 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1202 PrintAndLog(" <invert>, 1 for invert output");
1203 PrintAndLog(" [set maximum allowed errors], default = 100.");
1204 PrintAndLog("");
1205 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1206 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1207 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1208 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1209 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");
1210 return 0;
1211 }
1212 return NRZrawDemod(Cmd, true);
1213 }
1214
1215 // by marshmellow
1216 // takes 3 arguments - clock, invert, maxErr as integers
1217 // attempts to demodulate psk only
1218 // prints binary found and saves in demodbuffer for further commands
1219 int CmdPSK1rawDemod(const char *Cmd)
1220 {
1221 int ans;
1222 char cmdp = param_getchar(Cmd, 0);
1223 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1224 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1225 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1226 PrintAndLog(" <invert>, 1 for invert output");
1227 PrintAndLog(" [set maximum allowed errors], default = 100.");
1228 PrintAndLog("");
1229 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1230 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1231 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1232 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1233 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");
1234 return 0;
1235 }
1236 ans = PSKDemod(Cmd, true);
1237 //output
1238 if (!ans){
1239 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1240 return 0;
1241 }
1242
1243 PrintAndLog("PSK1 demoded bitstream:");
1244 // Now output the bitstream to the scrollback by line of 16 bits
1245 printDemodBuff();
1246 return 1;
1247 }
1248
1249 // by marshmellow
1250 // takes same args as cmdpsk1rawdemod
1251 int CmdPSK2rawDemod(const char *Cmd)
1252 {
1253 int ans=0;
1254 char cmdp = param_getchar(Cmd, 0);
1255 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1256 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1257 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1258 PrintAndLog(" <invert>, 1 for invert output");
1259 PrintAndLog(" [set maximum allowed errors], default = 100.");
1260 PrintAndLog("");
1261 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1262 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1263 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1264 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1265 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");
1266 return 0;
1267 }
1268 ans=PSKDemod(Cmd, true);
1269 if (!ans){
1270 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1271 return 0;
1272 }
1273 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1274 PrintAndLog("PSK2 demoded bitstream:");
1275 // Now output the bitstream to the scrollback by line of 16 bits
1276 printDemodBuff();
1277 return 1;
1278 }
1279
1280 // by marshmellow - combines all raw demod functions into one menu command
1281 int CmdRawDemod(const char *Cmd)
1282 {
1283 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1284
1285 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1286 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1287 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1288 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1289 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1290 PrintAndLog(" <options> see specific modulation help for optional parameters");
1291 PrintAndLog("");
1292 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1293 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1294 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1295 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1296 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1297 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1298 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1299 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1300 return 0;
1301 }
1302 char cmdp2 = Cmd[1];
1303 int ans = 0;
1304 if (cmdp == 'f' && cmdp2 == 's'){
1305 ans = CmdFSKrawdemod(Cmd+2);
1306 } else if(cmdp == 'a' && cmdp2 == 'b'){
1307 ans = Cmdaskbiphdemod(Cmd+2);
1308 } else if(cmdp == 'a' && cmdp2 == 'm'){
1309 ans = Cmdaskmandemod(Cmd+2);
1310 } else if(cmdp == 'a' && cmdp2 == 'r'){
1311 ans = Cmdaskrawdemod(Cmd+2);
1312 } else if(cmdp == 'n' && cmdp2 == 'r'){
1313 ans = CmdNRZrawDemod(Cmd+2);
1314 } else if(cmdp == 'p' && cmdp2 == '1'){
1315 ans = CmdPSK1rawDemod(Cmd+2);
1316 } else if(cmdp == 'p' && cmdp2 == '2'){
1317 ans = CmdPSK2rawDemod(Cmd+2);
1318 } else {
1319 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1320 }
1321 return ans;
1322 }
1323
1324 int CmdGrid(const char *Cmd)
1325 {
1326 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1327 PlotGridXdefault= PlotGridX;
1328 PlotGridYdefault= PlotGridY;
1329 RepaintGraphWindow();
1330 return 0;
1331 }
1332
1333 int CmdSetGraphMarkers(const char *Cmd) {
1334 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1335 RepaintGraphWindow();
1336 return 0;
1337 }
1338
1339 int CmdHexsamples(const char *Cmd)
1340 {
1341 int i, j;
1342 int requested = 0;
1343 int offset = 0;
1344 char string_buf[25];
1345 char* string_ptr = string_buf;
1346 uint8_t got[BIGBUF_SIZE];
1347
1348 sscanf(Cmd, "%i %i", &requested, &offset);
1349
1350 /* if no args send something */
1351 if (requested == 0) {
1352 requested = 8;
1353 }
1354 if (offset + requested > sizeof(got)) {
1355 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1356 return 0;
1357 }
1358
1359 GetFromBigBuf(got,requested,offset);
1360 WaitForResponse(CMD_ACK,NULL);
1361
1362 i = 0;
1363 for (j = 0; j < requested; j++) {
1364 i++;
1365 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1366 if (i == 8) {
1367 *(string_ptr - 1) = '\0'; // remove the trailing space
1368 PrintAndLog("%s", string_buf);
1369 string_buf[0] = '\0';
1370 string_ptr = string_buf;
1371 i = 0;
1372 }
1373 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1374 *(string_ptr - 1) = '\0';
1375 PrintAndLog("%s", string_buf);
1376 string_buf[0] = '\0';
1377 }
1378 }
1379 return 0;
1380 }
1381
1382 int CmdHide(const char *Cmd)
1383 {
1384 HideGraphWindow();
1385 return 0;
1386 }
1387
1388 //zero mean GraphBuffer
1389 int CmdHpf(const char *Cmd)
1390 {
1391 int i;
1392 int accum = 0;
1393
1394 for (i = 10; i < GraphTraceLen; ++i)
1395 accum += GraphBuffer[i];
1396 accum /= (GraphTraceLen - 10);
1397 for (i = 0; i < GraphTraceLen; ++i)
1398 GraphBuffer[i] -= accum;
1399
1400 RepaintGraphWindow();
1401 return 0;
1402 }
1403
1404 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1405 {
1406 int i;
1407 uint8_t val = 0;
1408 for(i =0 ; i < bits_per_sample; i++)
1409 {
1410 val |= (headBit(b) << (7-i));
1411 }
1412 return val;
1413 }
1414
1415 int getSamples(const char *Cmd, bool silent)
1416 {
1417 //If we get all but the last byte in bigbuf,
1418 // we don't have to worry about remaining trash
1419 // in the last byte in case the bits-per-sample
1420 // does not line up on byte boundaries
1421
1422 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1423
1424 int n = strtol(Cmd, NULL, 0);
1425
1426 if (n == 0 || n > sizeof(got))
1427 n = sizeof(got);
1428
1429 PrintAndLog("Reading %d bytes from device memory\n", n);
1430 GetFromBigBuf(got,n,0);
1431 PrintAndLog("Data fetched");
1432 UsbCommand response;
1433 WaitForResponse(CMD_ACK, &response);
1434 uint8_t bits_per_sample = 8;
1435
1436 //Old devices without this feature would send 0 at arg[0]
1437 if(response.arg[0] > 0)
1438 {
1439 sample_config *sc = (sample_config *) response.d.asBytes;
1440 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1441 , sc->decimation);
1442 bits_per_sample = sc->bits_per_sample;
1443 }
1444 if(bits_per_sample < 8)
1445 {
1446 PrintAndLog("Unpacking...");
1447 BitstreamIn bout = { got, bits_per_sample * n, 0};
1448 int j =0;
1449 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1450 uint8_t sample = getByte(bits_per_sample, &bout);
1451 GraphBuffer[j] = ((int) sample )- 128;
1452 }
1453 GraphTraceLen = j;
1454 PrintAndLog("Unpacked %d samples" , j );
1455 }else
1456 {
1457 for (int j = 0; j < n; j++) {
1458 GraphBuffer[j] = ((int)got[j]) - 128;
1459 }
1460 GraphTraceLen = n;
1461 }
1462
1463 RepaintGraphWindow();
1464 return 0;
1465 }
1466
1467 int CmdSamples(const char *Cmd)
1468 {
1469 return getSamples(Cmd, false);
1470 }
1471
1472 int CmdTuneSamples(const char *Cmd)
1473 {
1474 int timeout = 0, arg = FLAG_TUNE_ALL;
1475
1476 if(*Cmd == 'l') {
1477 arg = FLAG_TUNE_LF;
1478 } else if (*Cmd == 'h') {
1479 arg = FLAG_TUNE_HF;
1480 } else if (*Cmd != '\0') {
1481 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1482 return 0;
1483 }
1484
1485 printf("\nMeasuring antenna characteristics, please wait...");
1486
1487 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1488 SendCommand(&c);
1489
1490 UsbCommand resp;
1491 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1492 timeout++;
1493 printf(".");
1494 if (timeout > 7) {
1495 PrintAndLog("\nNo response from Proxmark. Aborting...");
1496 return 1;
1497 }
1498 }
1499
1500 int peakv, peakf;
1501 int vLf125, vLf134, vHf;
1502 vLf125 = resp.arg[0] & 0xffff;
1503 vLf134 = resp.arg[0] >> 16;
1504 vHf = resp.arg[1] & 0xffff;;
1505 peakf = resp.arg[2] & 0xffff;
1506 peakv = resp.arg[2] >> 16;
1507 PrintAndLog("");
1508 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1509 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1510 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1511 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1512
1513 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1514 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1515 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1516 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1517
1518 if (peakv < LF_UNUSABLE_V)
1519 PrintAndLog("# Your LF antenna is unusable.");
1520 else if (peakv < LF_MARGINAL_V)
1521 PrintAndLog("# Your LF antenna is marginal.");
1522 if (vHf < HF_UNUSABLE_V)
1523 PrintAndLog("# Your HF antenna is unusable.");
1524 else if (vHf < HF_MARGINAL_V)
1525 PrintAndLog("# Your HF antenna is marginal.");
1526
1527 if (peakv >= LF_UNUSABLE_V) {
1528 for (int i = 0; i < 256; i++) {
1529 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1530 }
1531 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1532 PrintAndLog("\n");
1533 GraphTraceLen = 256;
1534 ShowGraphWindow();
1535 RepaintGraphWindow();
1536 }
1537
1538 return 0;
1539 }
1540
1541
1542 int CmdLoad(const char *Cmd)
1543 {
1544 char filename[FILE_PATH_SIZE] = {0x00};
1545 int len = 0;
1546
1547 len = strlen(Cmd);
1548 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1549 memcpy(filename, Cmd, len);
1550
1551 FILE *f = fopen(filename, "r");
1552 if (!f) {
1553 PrintAndLog("couldn't open '%s'", filename);
1554 return 0;
1555 }
1556
1557 GraphTraceLen = 0;
1558 char line[80];
1559 while (fgets(line, sizeof (line), f)) {
1560 GraphBuffer[GraphTraceLen] = atoi(line);
1561 GraphTraceLen++;
1562 }
1563 fclose(f);
1564 PrintAndLog("loaded %d samples", GraphTraceLen);
1565 RepaintGraphWindow();
1566 return 0;
1567 }
1568
1569 int CmdLtrim(const char *Cmd)
1570 {
1571 int ds = atoi(Cmd);
1572 if (GraphTraceLen<=0) return 0;
1573 for (int i = ds; i < GraphTraceLen; ++i)
1574 GraphBuffer[i-ds] = GraphBuffer[i];
1575 GraphTraceLen -= ds;
1576
1577 RepaintGraphWindow();
1578 return 0;
1579 }
1580
1581 // trim graph to input argument length
1582 int CmdRtrim(const char *Cmd)
1583 {
1584 int ds = atoi(Cmd);
1585
1586 GraphTraceLen = ds;
1587
1588 RepaintGraphWindow();
1589 return 0;
1590 }
1591
1592 // trim graph (middle) piece
1593 int CmdMtrim(const char *Cmd) {
1594 int start = 0, stop = 0;
1595 sscanf(Cmd, "%i %i", &start, &stop);
1596
1597 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1598 start++; //leave start position sample
1599
1600 GraphTraceLen -= stop - start;
1601 for (int i = 0; i < GraphTraceLen; i++) {
1602 GraphBuffer[start+i] = GraphBuffer[stop+i];
1603 }
1604 return 0;
1605 }
1606
1607
1608 int CmdNorm(const char *Cmd)
1609 {
1610 int i;
1611 int max = INT_MIN, min = INT_MAX;
1612
1613 for (i = 10; i < GraphTraceLen; ++i) {
1614 if (GraphBuffer[i] > max)
1615 max = GraphBuffer[i];
1616 if (GraphBuffer[i] < min)
1617 min = GraphBuffer[i];
1618 }
1619
1620 if (max != min) {
1621 for (i = 0; i < GraphTraceLen; ++i) {
1622 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
1623 (max - min);
1624 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
1625 }
1626 }
1627 RepaintGraphWindow();
1628 return 0;
1629 }
1630
1631 int CmdPlot(const char *Cmd)
1632 {
1633 ShowGraphWindow();
1634 return 0;
1635 }
1636
1637 int CmdSave(const char *Cmd)
1638 {
1639 char filename[FILE_PATH_SIZE] = {0x00};
1640 int len = 0;
1641
1642 len = strlen(Cmd);
1643 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1644 memcpy(filename, Cmd, len);
1645
1646
1647 FILE *f = fopen(filename, "w");
1648 if(!f) {
1649 PrintAndLog("couldn't open '%s'", filename);
1650 return 0;
1651 }
1652 int i;
1653 for (i = 0; i < GraphTraceLen; i++) {
1654 fprintf(f, "%d\n", GraphBuffer[i]);
1655 }
1656 fclose(f);
1657 PrintAndLog("saved to '%s'", Cmd);
1658 return 0;
1659 }
1660
1661 int CmdScale(const char *Cmd)
1662 {
1663 CursorScaleFactor = atoi(Cmd);
1664 if (CursorScaleFactor == 0) {
1665 PrintAndLog("bad, can't have zero scale");
1666 CursorScaleFactor = 1;
1667 }
1668 RepaintGraphWindow();
1669 return 0;
1670 }
1671
1672 int CmdDirectionalThreshold(const char *Cmd)
1673 {
1674 int8_t upThres = param_get8(Cmd, 0);
1675 int8_t downThres = param_get8(Cmd, 1);
1676
1677 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1678
1679 int lastValue = GraphBuffer[0];
1680 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1681
1682 for (int i = 1; i < GraphTraceLen; ++i) {
1683 // Apply first threshold to samples heading up
1684 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
1685 {
1686 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1687 GraphBuffer[i] = 127;
1688 }
1689 // Apply second threshold to samples heading down
1690 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
1691 {
1692 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1693 GraphBuffer[i] = -127;
1694 }
1695 else
1696 {
1697 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1698 GraphBuffer[i] = GraphBuffer[i-1];
1699
1700 }
1701 }
1702 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
1703 RepaintGraphWindow();
1704 return 0;
1705 }
1706
1707 int CmdZerocrossings(const char *Cmd)
1708 {
1709 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1710 CmdHpf("");
1711
1712 int sign = 1;
1713 int zc = 0;
1714 int lastZc = 0;
1715
1716 for (int i = 0; i < GraphTraceLen; ++i) {
1717 if (GraphBuffer[i] * sign >= 0) {
1718 // No change in sign, reproduce the previous sample count.
1719 zc++;
1720 GraphBuffer[i] = lastZc;
1721 } else {
1722 // Change in sign, reset the sample count.
1723 sign = -sign;
1724 GraphBuffer[i] = lastZc;
1725 if (sign > 0) {
1726 lastZc = zc;
1727 zc = 0;
1728 }
1729 }
1730 }
1731
1732 RepaintGraphWindow();
1733 return 0;
1734 }
1735
1736 int usage_data_bin2hex(){
1737 PrintAndLog("Usage: data bin2hex <binary_digits>");
1738 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1739 return 0;
1740 }
1741
1742 /**
1743 * @brief Utility for conversion via cmdline.
1744 * @param Cmd
1745 * @return
1746 */
1747 int Cmdbin2hex(const char *Cmd)
1748 {
1749 int bg =0, en =0;
1750 if(param_getptr(Cmd, &bg, &en, 0))
1751 {
1752 return usage_data_bin2hex();
1753 }
1754 //Number of digits supplied as argument
1755 size_t length = en - bg +1;
1756 size_t bytelen = (length+7) / 8;
1757 uint8_t* arr = (uint8_t *) malloc(bytelen);
1758 memset(arr, 0, bytelen);
1759 BitstreamOut bout = { arr, 0, 0 };
1760
1761 for(; bg <= en ;bg++)
1762 {
1763 char c = Cmd[bg];
1764 if( c == '1') pushBit(&bout, 1);
1765 else if( c == '0') pushBit(&bout, 0);
1766 else PrintAndLog("Ignoring '%c'", c);
1767 }
1768
1769 if(bout.numbits % 8 != 0)
1770 {
1771 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1772 }
1773
1774 //Uses printf instead of PrintAndLog since the latter
1775 // adds linebreaks to each printout - this way was more convenient since we don't have to
1776 // allocate a string and write to that first...
1777 for(size_t x = 0; x < bytelen ; x++)
1778 {
1779 printf("%02X", arr[x]);
1780 }
1781 printf("\n");
1782 free(arr);
1783 return 0;
1784 }
1785
1786 int usage_data_hex2bin() {
1787 PrintAndLog("Usage: data hex2bin <hex_digits>");
1788 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1789 return 0;
1790
1791 }
1792
1793 int Cmdhex2bin(const char *Cmd)
1794 {
1795 int bg =0, en =0;
1796 if(param_getptr(Cmd, &bg, &en, 0))
1797 {
1798 return usage_data_hex2bin();
1799 }
1800
1801
1802 while(bg <= en )
1803 {
1804 char x = Cmd[bg++];
1805 // capitalize
1806 if (x >= 'a' && x <= 'f')
1807 x -= 32;
1808 // convert to numeric value
1809 if (x >= '0' && x <= '9')
1810 x -= '0';
1811 else if (x >= 'A' && x <= 'F')
1812 x -= 'A' - 10;
1813 else
1814 continue;
1815
1816 //Uses printf instead of PrintAndLog since the latter
1817 // adds linebreaks to each printout - this way was more convenient since we don't have to
1818 // allocate a string and write to that first...
1819
1820 for(int i= 0 ; i < 4 ; ++i)
1821 printf("%d",(x >> (3 - i)) & 1);
1822 }
1823 printf("\n");
1824
1825 return 0;
1826 }
1827
1828 static command_t CommandTable[] =
1829 {
1830 {"help", CmdHelp, 1, "This help"},
1831 {"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)"},
1832 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
1833 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
1834 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
1835 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
1836 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1837 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1838 {"dec", CmdDec, 1, "Decimate samples"},
1839 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
1840 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
1841 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
1842 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
1843 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1844 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1845 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1846 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
1847 {"hide", CmdHide, 1, "Hide graph window"},
1848 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1849 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1850 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1851 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1852 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
1853 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
1854 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1855 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1856 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
1857 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
1858 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
1859 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1860 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1861 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1862 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
1863 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1864 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
1865 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
1866 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1867 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1868 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1869 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1870 {NULL, NULL, 0, NULL}
1871 };
1872
1873 int CmdData(const char *Cmd)
1874 {
1875 CmdsParse(CommandTable, Cmd);
1876 return 0;
1877 }
1878
1879 int CmdHelp(const char *Cmd)
1880 {
1881 CmdsHelp(CommandTable);
1882 return 0;
1883 }
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