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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 //could be moved to a viking file
514 //by marshmellow
515 //see ASKDemod for what args are accepted
516 int CmdVikingDemod(const char *Cmd)
517 {
518 if (!ASKDemod(Cmd, false, false, 1)) {
519 if (g_debugMode) PrintAndLog("ASKDemod failed");
520 return 0;
521 }
522 size_t size = DemodBufferLen;
523 //call lfdemod.c demod for Viking
524 int ans = VikingDemod_AM(DemodBuffer, &size);
525 if (ans < 0) {
526 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
527 return 0;
528 }
529 //got a good demod
530 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
531 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
532 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
533 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
534 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);
535 PrintAndLog("Raw: %08X%08X", raw1,raw2);
536 setDemodBuf(DemodBuffer+ans, 64, 0);
537 return 1;
538 }
539
540 //by marshmellow - see ASKDemod
541 int Cmdaskrawdemod(const char *Cmd)
542 {
543 char cmdp = param_getchar(Cmd, 0);
544 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
545 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
546 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
547 PrintAndLog(" <invert>, 1 to invert output");
548 PrintAndLog(" [set maximum allowed errors], default = 100");
549 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
550 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
551 PrintAndLog("");
552 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
553 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
554 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
555 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
556 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
557 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");
558 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");
559 return 0;
560 }
561 return ASKDemod(Cmd, true, false, 0);
562 }
563
564 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
565 {
566 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
567 size_t Correlation = 0;
568 int maxSum = 0;
569 int lastMax = 0;
570 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
571 for (int i = 0; i < GraphTraceLen - window; ++i) {
572 int sum = 0;
573 for (int j = 0; j < window; ++j) {
574 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
575 }
576 CorrelBuffer[i] = sum;
577 if (sum >= maxSum-100 && sum <= maxSum+100){
578 //another max
579 Correlation = i-lastMax;
580 lastMax = i;
581 if (sum > maxSum) maxSum = sum;
582 } else if (sum > maxSum){
583 maxSum=sum;
584 lastMax = i;
585 }
586 }
587 if (Correlation==0){
588 //try again with wider margin
589 for (int i = 0; i < GraphTraceLen - window; i++){
590 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
591 //another max
592 Correlation = i-lastMax;
593 lastMax = i;
594 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
595 }
596 }
597 }
598 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
599
600 if (SaveGrph){
601 GraphTraceLen = GraphTraceLen - window;
602 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
603 RepaintGraphWindow();
604 }
605 return Correlation;
606 }
607
608 int usage_data_autocorr(void)
609 {
610 //print help
611 PrintAndLog("Usage: data autocorr [window] [g]");
612 PrintAndLog("Options: ");
613 PrintAndLog(" h This help");
614 PrintAndLog(" [window] window length for correlation - default = 4000");
615 PrintAndLog(" g save back to GraphBuffer (overwrite)");
616 return 0;
617 }
618
619 int CmdAutoCorr(const char *Cmd)
620 {
621 char cmdp = param_getchar(Cmd, 0);
622 if (cmdp == 'h' || cmdp == 'H')
623 return usage_data_autocorr();
624 int window = 4000; //set default
625 char grph=0;
626 bool updateGrph = false;
627 sscanf(Cmd, "%i %c", &window, &grph);
628
629 if (window >= GraphTraceLen) {
630 PrintAndLog("window must be smaller than trace (%d samples)",
631 GraphTraceLen);
632 return 0;
633 }
634 if (grph == 'g') updateGrph=true;
635 return AutoCorrelate(window, updateGrph, true);
636 }
637
638 int CmdBitsamples(const char *Cmd)
639 {
640 int cnt = 0;
641 uint8_t got[12288];
642
643 GetFromBigBuf(got,sizeof(got),0);
644 WaitForResponse(CMD_ACK,NULL);
645
646 for (int j = 0; j < sizeof(got); j++) {
647 for (int k = 0; k < 8; k++) {
648 if(got[j] & (1 << (7 - k))) {
649 GraphBuffer[cnt++] = 1;
650 } else {
651 GraphBuffer[cnt++] = 0;
652 }
653 }
654 }
655 GraphTraceLen = cnt;
656 RepaintGraphWindow();
657 return 0;
658 }
659
660 int CmdBuffClear(const char *Cmd)
661 {
662 UsbCommand c = {CMD_BUFF_CLEAR};
663 SendCommand(&c);
664 ClearGraph(true);
665 return 0;
666 }
667
668 int CmdDec(const char *Cmd)
669 {
670 for (int i = 0; i < (GraphTraceLen / 2); ++i)
671 GraphBuffer[i] = GraphBuffer[i * 2];
672 GraphTraceLen /= 2;
673 PrintAndLog("decimated by 2");
674 RepaintGraphWindow();
675 return 0;
676 }
677 /**
678 * Undecimate - I'd call it 'interpolate', but we'll save that
679 * name until someone does an actual interpolation command, not just
680 * blindly repeating samples
681 * @param Cmd
682 * @return
683 */
684 int CmdUndec(const char *Cmd)
685 {
686 if(param_getchar(Cmd, 0) == 'h')
687 {
688 PrintAndLog("Usage: data undec [factor]");
689 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
690 PrintAndLog("Options: ");
691 PrintAndLog(" h This help");
692 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
693 PrintAndLog("Example: 'data undec 3'");
694 return 0;
695 }
696
697 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
698 //We have memory, don't we?
699 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
700 uint32_t g_index = 0, s_index = 0;
701 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
702 {
703 int count = 0;
704 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
705 swap[s_index+count] = GraphBuffer[g_index];
706
707 s_index += count;
708 g_index++;
709 }
710
711 memcpy(GraphBuffer, swap, s_index * sizeof(int));
712 GraphTraceLen = s_index;
713 RepaintGraphWindow();
714 return 0;
715 }
716
717 //by marshmellow
718 //shift graph zero up or down based on input + or -
719 int CmdGraphShiftZero(const char *Cmd)
720 {
721
722 int shift=0;
723 //set options from parameters entered with the command
724 sscanf(Cmd, "%i", &shift);
725 int shiftedVal=0;
726 for(int i = 0; i<GraphTraceLen; i++){
727 shiftedVal=GraphBuffer[i]+shift;
728 if (shiftedVal>127)
729 shiftedVal=127;
730 else if (shiftedVal<-127)
731 shiftedVal=-127;
732 GraphBuffer[i]= shiftedVal;
733 }
734 CmdNorm("");
735 return 0;
736 }
737
738 //by marshmellow
739 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
740 //similar to dirtheshold, threshold commands
741 //takes a threshold length which is the measured length between two samples then determines an edge
742 int CmdAskEdgeDetect(const char *Cmd)
743 {
744 int thresLen = 25;
745 int Last = 0;
746 sscanf(Cmd, "%i", &thresLen);
747
748 for(int i = 1; i<GraphTraceLen; i++){
749 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
750 Last = 127;
751 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
752 Last = -127;
753 GraphBuffer[i-1] = Last;
754 }
755 RepaintGraphWindow();
756 return 0;
757 }
758
759 /* Print our clock rate */
760 // uses data from graphbuffer
761 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
762 int CmdDetectClockRate(const char *Cmd)
763 {
764 char cmdp = param_getchar(Cmd, 0);
765 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
766 PrintAndLog("Usage: data detectclock [modulation] <clock>");
767 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
768 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
769 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
770 PrintAndLog("");
771 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
772 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
773 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
774 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
775 }
776 int ans=0;
777 if (cmdp == 'a'){
778 ans = GetAskClock(Cmd+1, true, false);
779 } else if (cmdp == 'f'){
780 ans = GetFskClock("", true, false);
781 } else if (cmdp == 'n'){
782 ans = GetNrzClock("", true, false);
783 } else if (cmdp == 'p'){
784 ans = GetPskClock("", true, false);
785 } else {
786 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
787 }
788 return ans;
789 }
790
791 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
792 {
793 static char fType[8];
794 memset(fType, 0x00, 8);
795 char *fskType = fType;
796 if (fchigh==10 && fclow==8){
797 if (invert) //fsk2a
798 memcpy(fskType, "FSK2a", 5);
799 else //fsk2
800 memcpy(fskType, "FSK2", 4);
801 } else if (fchigh == 8 && fclow == 5) {
802 if (invert)
803 memcpy(fskType, "FSK1", 4);
804 else
805 memcpy(fskType, "FSK1a", 5);
806 } else {
807 memcpy(fskType, "FSK??", 5);
808 }
809 return fskType;
810 }
811
812 //by marshmellow
813 //fsk raw demod and print binary
814 //takes 4 arguments - Clock, invert, fchigh, fclow
815 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
816 int FSKrawDemod(const char *Cmd, bool verbose)
817 {
818 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
819 uint8_t rfLen, invert, fchigh, fclow;
820 //set defaults
821 //set options from parameters entered with the command
822 rfLen = param_get8(Cmd, 0);
823 invert = param_get8(Cmd, 1);
824 fchigh = param_get8(Cmd, 2);
825 fclow = param_get8(Cmd, 3);
826
827 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
828 if (rfLen==1) {
829 invert = 1; //if invert option only is used
830 rfLen = 0;
831 }
832 }
833 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
834 size_t BitLen = getFromGraphBuf(BitStream);
835 if (BitLen==0) return 0;
836 //get field clock lengths
837 uint16_t fcs=0;
838 if (!fchigh || !fclow) {
839 fcs = countFC(BitStream, BitLen, 1);
840 if (!fcs) {
841 fchigh = 10;
842 fclow = 8;
843 } else {
844 fchigh = (fcs >> 8) & 0x00FF;
845 fclow = fcs & 0x00FF;
846 }
847 }
848 //get bit clock length
849 if (!rfLen) {
850 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
851 if (!rfLen) rfLen = 50;
852 }
853 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
854 if (size > 0) {
855 setDemodBuf(BitStream,size,0);
856
857 // Now output the bitstream to the scrollback by line of 16 bits
858 if (verbose || g_debugMode) {
859 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
860 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
861 printDemodBuff();
862 }
863
864 return 1;
865 } else {
866 if (g_debugMode) PrintAndLog("no FSK data found");
867 }
868 return 0;
869 }
870
871 //by marshmellow
872 //fsk raw demod and print binary
873 //takes 4 arguments - Clock, invert, fchigh, fclow
874 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
875 int CmdFSKrawdemod(const char *Cmd)
876 {
877 char cmdp = param_getchar(Cmd, 0);
878 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
879 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
880 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
881 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
882 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
883 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
884 PrintAndLog("");
885 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
886 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
887 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
888 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
889 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
890 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
891 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
892 return 0;
893 }
894 return FSKrawDemod(Cmd, true);
895 }
896
897 //by marshmellow
898 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
899 //print full Paradox Prox ID and some bit format details if found
900 int CmdFSKdemodParadox(const char *Cmd)
901 {
902 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
903 uint32_t hi2=0, hi=0, lo=0;
904
905 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
906 size_t BitLen = getFromGraphBuf(BitStream);
907 if (BitLen==0) return 0;
908 //get binary from fsk wave
909 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
910 if (idx<0){
911 if (g_debugMode){
912 if (idx==-1){
913 PrintAndLog("DEBUG: Just Noise Detected");
914 } else if (idx == -2) {
915 PrintAndLog("DEBUG: Error demoding fsk");
916 } else if (idx == -3) {
917 PrintAndLog("DEBUG: Preamble not found");
918 } else if (idx == -4) {
919 PrintAndLog("DEBUG: Error in Manchester data");
920 } else {
921 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
922 }
923 }
924 return 0;
925 }
926 if (hi2==0 && hi==0 && lo==0){
927 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
928 return 0;
929 }
930 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
931 uint32_t cardnum = (lo>>10)&0xFFFF;
932 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
933 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
934 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
935
936 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
937 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
938 setDemodBuf(BitStream,BitLen,idx);
939 if (g_debugMode){
940 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
941 printDemodBuff();
942 }
943 return 1;
944 }
945
946 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
947 // 8 databits + 1 parity (1)
948 // CIITT 16 chksum
949 // NATIONAL CODE, ICAR database
950 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
951 // FLAG (animal/non-animal)
952 /*
953 38 IDbits
954 10 country code
955 1 extra app bit
956 14 reserved bits
957 1 animal bit
958 16 ccitt CRC chksum over 64bit ID CODE.
959 24 appli bits.
960
961 -- sample: 985121004515220 [ 37FF65B88EF94 ]
962 */
963 int CmdFDXBdemodBI(const char *Cmd){
964
965 int invert = 1;
966 int clk = 32;
967 int errCnt = 0;
968 int maxErr = 0;
969 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
970 size_t size = getFromGraphBuf(BitStream);
971
972 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
973 if ( errCnt < 0 || errCnt > maxErr ) {
974 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
975 return 0;
976 }
977
978 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
979 if (errCnt < 0 || errCnt > maxErr ) {
980 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
981 return 0;
982 }
983
984 int preambleIndex = FDXBdemodBI(BitStream, &size);
985 if (preambleIndex < 0){
986 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
987 return 0;
988 }
989 if (size != 128) {
990 if (g_debugMode) PrintAndLog("Error incorrect data length found");
991 return 0;
992 }
993
994 setDemodBuf(BitStream, 128, preambleIndex);
995
996 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
997 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
998 if ( size != 104 ) {
999 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1000 return 0;
1001 }
1002 if (g_debugMode) {
1003 char *bin = sprint_bin_break(BitStream,size,16);
1004 PrintAndLog("DEBUG BinStream:\n%s",bin);
1005 }
1006 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1007 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1008
1009 //got a good demod
1010 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1011 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1012 uint8_t dataBlockBit = BitStream[48];
1013 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1014 uint8_t animalBit = BitStream[63];
1015 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1016 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1017
1018 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1019 uint8_t raw[8];
1020 num_to_bytes(rawid, 8, raw);
1021
1022 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1023
1024 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1025 PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode);
1026 PrintAndLog("National Code: %012" PRIu64, NationalCode);
1027 PrintAndLog("CountryCode: %04u", countryCode);
1028 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1029 PrintAndLog("reserved Code: %u", reservedCode);
1030 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1031 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1032 PrintAndLog("Extended: 0x%X\n", extended);
1033
1034 return 1;
1035 }
1036
1037
1038 //by marshmellow
1039 //attempt to psk1 demod graph buffer
1040 int PSKDemod(const char *Cmd, bool verbose)
1041 {
1042 int invert=0;
1043 int clk=0;
1044 int maxErr=100;
1045 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1046 if (clk==1){
1047 invert=1;
1048 clk=0;
1049 }
1050 if (invert != 0 && invert != 1) {
1051 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1052 return 0;
1053 }
1054 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1055 size_t BitLen = getFromGraphBuf(BitStream);
1056 if (BitLen==0) return 0;
1057 uint8_t carrier=countFC(BitStream, BitLen, 0);
1058 if (carrier!=2 && carrier!=4 && carrier!=8){
1059 //invalid carrier
1060 return 0;
1061 }
1062 if (g_debugMode){
1063 PrintAndLog("Carrier: rf/%d",carrier);
1064 }
1065 int errCnt=0;
1066 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1067 if (errCnt > maxErr){
1068 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1069 return 0;
1070 }
1071 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1072 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1073 return 0;
1074 }
1075 if (verbose || g_debugMode){
1076 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1077 if (errCnt>0){
1078 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1079 }
1080 }
1081 //prime demod buffer for output
1082 setDemodBuf(BitStream,BitLen,0);
1083 return 1;
1084 }
1085
1086 // Indala 26 bit decode
1087 // by marshmellow
1088 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1089 int CmdIndalaDecode(const char *Cmd)
1090 {
1091 int ans;
1092 if (strlen(Cmd)>0){
1093 ans = PSKDemod(Cmd, 0);
1094 } else{ //default to RF/32
1095 ans = PSKDemod("32", 0);
1096 }
1097
1098 if (!ans){
1099 if (g_debugMode)
1100 PrintAndLog("Error1: %d",ans);
1101 return 0;
1102 }
1103 uint8_t invert=0;
1104 size_t size = DemodBufferLen;
1105 int startIdx = indala26decode(DemodBuffer, &size, &invert);
1106 if (startIdx < 0 || size > 224) {
1107 if (g_debugMode)
1108 PrintAndLog("Error2: %d",ans);
1109 return -1;
1110 }
1111 setDemodBuf(DemodBuffer, size, (size_t)startIdx);
1112 if (invert)
1113 if (g_debugMode)
1114 PrintAndLog("Had to invert bits");
1115
1116 PrintAndLog("BitLen: %d",DemodBufferLen);
1117 //convert UID to HEX
1118 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1119 uid1=bytebits_to_byte(DemodBuffer,32);
1120 uid2=bytebits_to_byte(DemodBuffer+32,32);
1121 if (DemodBufferLen==64) {
1122 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1123 } else {
1124 uid3=bytebits_to_byte(DemodBuffer+64,32);
1125 uid4=bytebits_to_byte(DemodBuffer+96,32);
1126 uid5=bytebits_to_byte(DemodBuffer+128,32);
1127 uid6=bytebits_to_byte(DemodBuffer+160,32);
1128 uid7=bytebits_to_byte(DemodBuffer+192,32);
1129 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1130 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1131 }
1132 if (g_debugMode){
1133 PrintAndLog("DEBUG: printing demodbuffer:");
1134 printDemodBuff();
1135 }
1136 return 1;
1137 }
1138
1139 int CmdPSKNexWatch(const char *Cmd)
1140 {
1141 if (!PSKDemod("", false)) return 0;
1142 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};
1143 size_t startIdx = 0, size = DemodBufferLen;
1144 bool invert = false;
1145 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1146 // if didn't find preamble try again inverting
1147 if (!PSKDemod("1", false)) return 0;
1148 size = DemodBufferLen;
1149 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1150 invert = true;
1151 }
1152 if (size != 128) return 0;
1153 setDemodBuf(DemodBuffer, size, startIdx+4);
1154 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1155 //get ID
1156 uint32_t ID = 0;
1157 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1158 for (uint8_t idx=0; idx<8; idx++){
1159 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1160 }
1161 }
1162 //parity check (TBD)
1163
1164 //checksum check (TBD)
1165
1166 //output
1167 PrintAndLog("NexWatch ID: %d", ID);
1168 if (invert){
1169 PrintAndLog("Had to Invert - probably NexKey");
1170 for (uint8_t idx=0; idx<size; idx++)
1171 DemodBuffer[idx] ^= 1;
1172 }
1173
1174 CmdPrintDemodBuff("x");
1175 return 1;
1176 }
1177
1178 // by marshmellow
1179 // takes 3 arguments - clock, invert, maxErr as integers
1180 // attempts to demodulate nrz only
1181 // prints binary found and saves in demodbuffer for further commands
1182 int NRZrawDemod(const char *Cmd, bool verbose)
1183 {
1184 int invert=0;
1185 int clk=0;
1186 int maxErr=100;
1187 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1188 if (clk==1){
1189 invert=1;
1190 clk=0;
1191 }
1192 if (invert != 0 && invert != 1) {
1193 PrintAndLog("Invalid argument: %s", Cmd);
1194 return 0;
1195 }
1196 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1197 size_t BitLen = getFromGraphBuf(BitStream);
1198 if (BitLen==0) return 0;
1199 int errCnt=0;
1200 int clkStartIdx = 0;
1201 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
1202 if (errCnt > maxErr){
1203 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1204 return 0;
1205 }
1206 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1207 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1208 return 0;
1209 }
1210 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1211 //prime demod buffer for output
1212 setDemodBuf(BitStream,BitLen,0);
1213
1214 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1215 if (verbose || g_debugMode) {
1216 PrintAndLog("NRZ demoded bitstream:");
1217 // Now output the bitstream to the scrollback by line of 16 bits
1218 printDemodBuff();
1219 }
1220 return 1;
1221 }
1222
1223 int CmdNRZrawDemod(const char *Cmd)
1224 {
1225 char cmdp = param_getchar(Cmd, 0);
1226 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1227 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1228 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1229 PrintAndLog(" <invert>, 1 for invert output");
1230 PrintAndLog(" [set maximum allowed errors], default = 100.");
1231 PrintAndLog("");
1232 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1233 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1234 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1235 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1236 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");
1237 return 0;
1238 }
1239 return NRZrawDemod(Cmd, true);
1240 }
1241
1242 // by marshmellow
1243 // takes 3 arguments - clock, invert, maxErr as integers
1244 // attempts to demodulate psk only
1245 // prints binary found and saves in demodbuffer for further commands
1246 int CmdPSK1rawDemod(const char *Cmd)
1247 {
1248 int ans;
1249 char cmdp = param_getchar(Cmd, 0);
1250 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1251 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1252 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1253 PrintAndLog(" <invert>, 1 for invert output");
1254 PrintAndLog(" [set maximum allowed errors], default = 100.");
1255 PrintAndLog("");
1256 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1257 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1258 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1259 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1260 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");
1261 return 0;
1262 }
1263 ans = PSKDemod(Cmd, true);
1264 //output
1265 if (!ans){
1266 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1267 return 0;
1268 }
1269
1270 PrintAndLog("PSK1 demoded bitstream:");
1271 // Now output the bitstream to the scrollback by line of 16 bits
1272 printDemodBuff();
1273 return 1;
1274 }
1275
1276 // by marshmellow
1277 // takes same args as cmdpsk1rawdemod
1278 int CmdPSK2rawDemod(const char *Cmd)
1279 {
1280 int ans=0;
1281 char cmdp = param_getchar(Cmd, 0);
1282 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1283 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1284 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1285 PrintAndLog(" <invert>, 1 for invert output");
1286 PrintAndLog(" [set maximum allowed errors], default = 100.");
1287 PrintAndLog("");
1288 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1289 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1290 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1291 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1292 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");
1293 return 0;
1294 }
1295 ans=PSKDemod(Cmd, true);
1296 if (!ans){
1297 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1298 return 0;
1299 }
1300 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1301 PrintAndLog("PSK2 demoded bitstream:");
1302 // Now output the bitstream to the scrollback by line of 16 bits
1303 printDemodBuff();
1304 return 1;
1305 }
1306
1307 // by marshmellow - combines all raw demod functions into one menu command
1308 int CmdRawDemod(const char *Cmd)
1309 {
1310 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1311
1312 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1313 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1314 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1315 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1316 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1317 PrintAndLog(" <options> see specific modulation help for optional parameters");
1318 PrintAndLog("");
1319 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1320 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1321 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1322 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1323 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1324 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1325 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1326 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1327 return 0;
1328 }
1329 char cmdp2 = Cmd[1];
1330 int ans = 0;
1331 if (cmdp == 'f' && cmdp2 == 's'){
1332 ans = CmdFSKrawdemod(Cmd+2);
1333 } else if(cmdp == 'a' && cmdp2 == 'b'){
1334 ans = Cmdaskbiphdemod(Cmd+2);
1335 } else if(cmdp == 'a' && cmdp2 == 'm'){
1336 ans = Cmdaskmandemod(Cmd+2);
1337 } else if(cmdp == 'a' && cmdp2 == 'r'){
1338 ans = Cmdaskrawdemod(Cmd+2);
1339 } else if(cmdp == 'n' && cmdp2 == 'r'){
1340 ans = CmdNRZrawDemod(Cmd+2);
1341 } else if(cmdp == 'p' && cmdp2 == '1'){
1342 ans = CmdPSK1rawDemod(Cmd+2);
1343 } else if(cmdp == 'p' && cmdp2 == '2'){
1344 ans = CmdPSK2rawDemod(Cmd+2);
1345 } else {
1346 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1347 }
1348 return ans;
1349 }
1350
1351 int CmdGrid(const char *Cmd)
1352 {
1353 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1354 PlotGridXdefault= PlotGridX;
1355 PlotGridYdefault= PlotGridY;
1356 RepaintGraphWindow();
1357 return 0;
1358 }
1359
1360 int CmdSetGraphMarkers(const char *Cmd) {
1361 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1362 RepaintGraphWindow();
1363 return 0;
1364 }
1365
1366 int CmdHexsamples(const char *Cmd)
1367 {
1368 int i, j;
1369 int requested = 0;
1370 int offset = 0;
1371 char string_buf[25];
1372 char* string_ptr = string_buf;
1373 uint8_t got[BIGBUF_SIZE];
1374
1375 sscanf(Cmd, "%i %i", &requested, &offset);
1376
1377 /* if no args send something */
1378 if (requested == 0) {
1379 requested = 8;
1380 }
1381 if (offset + requested > sizeof(got)) {
1382 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1383 return 0;
1384 }
1385
1386 GetFromBigBuf(got,requested,offset);
1387 WaitForResponse(CMD_ACK,NULL);
1388
1389 i = 0;
1390 for (j = 0; j < requested; j++) {
1391 i++;
1392 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1393 if (i == 8) {
1394 *(string_ptr - 1) = '\0'; // remove the trailing space
1395 PrintAndLog("%s", string_buf);
1396 string_buf[0] = '\0';
1397 string_ptr = string_buf;
1398 i = 0;
1399 }
1400 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1401 *(string_ptr - 1) = '\0';
1402 PrintAndLog("%s", string_buf);
1403 string_buf[0] = '\0';
1404 }
1405 }
1406 return 0;
1407 }
1408
1409 int CmdHide(const char *Cmd)
1410 {
1411 HideGraphWindow();
1412 return 0;
1413 }
1414
1415 //zero mean GraphBuffer
1416 int CmdHpf(const char *Cmd)
1417 {
1418 int i;
1419 int accum = 0;
1420
1421 for (i = 10; i < GraphTraceLen; ++i)
1422 accum += GraphBuffer[i];
1423 accum /= (GraphTraceLen - 10);
1424 for (i = 0; i < GraphTraceLen; ++i)
1425 GraphBuffer[i] -= accum;
1426
1427 RepaintGraphWindow();
1428 return 0;
1429 }
1430
1431 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1432 {
1433 int i;
1434 uint8_t val = 0;
1435 for(i =0 ; i < bits_per_sample; i++)
1436 {
1437 val |= (headBit(b) << (7-i));
1438 }
1439 return val;
1440 }
1441
1442 int getSamples(const char *Cmd, bool silent)
1443 {
1444 //If we get all but the last byte in bigbuf,
1445 // we don't have to worry about remaining trash
1446 // in the last byte in case the bits-per-sample
1447 // does not line up on byte boundaries
1448
1449 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1450
1451 int n = strtol(Cmd, NULL, 0);
1452
1453 if (n == 0 || n > sizeof(got))
1454 n = sizeof(got);
1455
1456 PrintAndLog("Reading %d bytes from device memory\n", n);
1457 GetFromBigBuf(got,n,0);
1458 PrintAndLog("Data fetched");
1459 UsbCommand response;
1460 WaitForResponse(CMD_ACK, &response);
1461 uint8_t bits_per_sample = 8;
1462
1463 //Old devices without this feature would send 0 at arg[0]
1464 if(response.arg[0] > 0)
1465 {
1466 sample_config *sc = (sample_config *) response.d.asBytes;
1467 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1468 , sc->decimation);
1469 bits_per_sample = sc->bits_per_sample;
1470 }
1471 if(bits_per_sample < 8)
1472 {
1473 PrintAndLog("Unpacking...");
1474 BitstreamIn bout = { got, bits_per_sample * n, 0};
1475 int j =0;
1476 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1477 uint8_t sample = getByte(bits_per_sample, &bout);
1478 GraphBuffer[j] = ((int) sample )- 128;
1479 }
1480 GraphTraceLen = j;
1481 PrintAndLog("Unpacked %d samples" , j );
1482 }else
1483 {
1484 for (int j = 0; j < n; j++) {
1485 GraphBuffer[j] = ((int)got[j]) - 128;
1486 }
1487 GraphTraceLen = n;
1488 }
1489
1490 RepaintGraphWindow();
1491 return 0;
1492 }
1493
1494 int CmdSamples(const char *Cmd)
1495 {
1496 return getSamples(Cmd, false);
1497 }
1498
1499 int CmdTuneSamples(const char *Cmd)
1500 {
1501 int timeout = 0, arg = FLAG_TUNE_ALL;
1502
1503 if(*Cmd == 'l') {
1504 arg = FLAG_TUNE_LF;
1505 } else if (*Cmd == 'h') {
1506 arg = FLAG_TUNE_HF;
1507 } else if (*Cmd != '\0') {
1508 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1509 return 0;
1510 }
1511
1512 printf("\nMeasuring antenna characteristics, please wait...");
1513
1514 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1515 SendCommand(&c);
1516
1517 UsbCommand resp;
1518 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1519 timeout++;
1520 printf(".");
1521 if (timeout > 7) {
1522 PrintAndLog("\nNo response from Proxmark. Aborting...");
1523 return 1;
1524 }
1525 }
1526
1527 int peakv, peakf;
1528 int vLf125, vLf134, vHf;
1529 vLf125 = resp.arg[0] & 0xffff;
1530 vLf134 = resp.arg[0] >> 16;
1531 vHf = resp.arg[1] & 0xffff;;
1532 peakf = resp.arg[2] & 0xffff;
1533 peakv = resp.arg[2] >> 16;
1534 PrintAndLog("");
1535 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1536 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1537 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1538 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1539
1540 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1541 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1542 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1543 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1544
1545 if (peakv < LF_UNUSABLE_V)
1546 PrintAndLog("# Your LF antenna is unusable.");
1547 else if (peakv < LF_MARGINAL_V)
1548 PrintAndLog("# Your LF antenna is marginal.");
1549 if (vHf < HF_UNUSABLE_V)
1550 PrintAndLog("# Your HF antenna is unusable.");
1551 else if (vHf < HF_MARGINAL_V)
1552 PrintAndLog("# Your HF antenna is marginal.");
1553
1554 if (peakv >= LF_UNUSABLE_V) {
1555 for (int i = 0; i < 256; i++) {
1556 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1557 }
1558 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1559 PrintAndLog("\n");
1560 GraphTraceLen = 256;
1561 ShowGraphWindow();
1562 RepaintGraphWindow();
1563 }
1564
1565 return 0;
1566 }
1567
1568
1569 int CmdLoad(const char *Cmd)
1570 {
1571 char filename[FILE_PATH_SIZE] = {0x00};
1572 int len = 0;
1573
1574 len = strlen(Cmd);
1575 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1576 memcpy(filename, Cmd, len);
1577
1578 FILE *f = fopen(filename, "r");
1579 if (!f) {
1580 PrintAndLog("couldn't open '%s'", filename);
1581 return 0;
1582 }
1583
1584 GraphTraceLen = 0;
1585 char line[80];
1586 while (fgets(line, sizeof (line), f)) {
1587 GraphBuffer[GraphTraceLen] = atoi(line);
1588 GraphTraceLen++;
1589 }
1590 fclose(f);
1591 PrintAndLog("loaded %d samples", GraphTraceLen);
1592 RepaintGraphWindow();
1593 return 0;
1594 }
1595
1596 int CmdLtrim(const char *Cmd)
1597 {
1598 int ds = atoi(Cmd);
1599 if (GraphTraceLen<=0) return 0;
1600 for (int i = ds; i < GraphTraceLen; ++i)
1601 GraphBuffer[i-ds] = GraphBuffer[i];
1602 GraphTraceLen -= ds;
1603
1604 RepaintGraphWindow();
1605 return 0;
1606 }
1607
1608 // trim graph to input argument length
1609 int CmdRtrim(const char *Cmd)
1610 {
1611 int ds = atoi(Cmd);
1612
1613 GraphTraceLen = ds;
1614
1615 RepaintGraphWindow();
1616 return 0;
1617 }
1618
1619 // trim graph (middle) piece
1620 int CmdMtrim(const char *Cmd) {
1621 int start = 0, stop = 0;
1622 sscanf(Cmd, "%i %i", &start, &stop);
1623
1624 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1625 start++; //leave start position sample
1626
1627 GraphTraceLen -= stop - start;
1628 for (int i = 0; i < GraphTraceLen; i++) {
1629 GraphBuffer[start+i] = GraphBuffer[stop+i];
1630 }
1631 return 0;
1632 }
1633
1634
1635 int CmdNorm(const char *Cmd)
1636 {
1637 int i;
1638 int max = INT_MIN, min = INT_MAX;
1639
1640 for (i = 10; i < GraphTraceLen; ++i) {
1641 if (GraphBuffer[i] > max)
1642 max = GraphBuffer[i];
1643 if (GraphBuffer[i] < min)
1644 min = GraphBuffer[i];
1645 }
1646
1647 if (max != min) {
1648 for (i = 0; i < GraphTraceLen; ++i) {
1649 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
1650 (max - min);
1651 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
1652 }
1653 }
1654 RepaintGraphWindow();
1655 return 0;
1656 }
1657
1658 int CmdPlot(const char *Cmd)
1659 {
1660 ShowGraphWindow();
1661 return 0;
1662 }
1663
1664 int CmdSave(const char *Cmd)
1665 {
1666 char filename[FILE_PATH_SIZE] = {0x00};
1667 int len = 0;
1668
1669 len = strlen(Cmd);
1670 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1671 memcpy(filename, Cmd, len);
1672
1673
1674 FILE *f = fopen(filename, "w");
1675 if(!f) {
1676 PrintAndLog("couldn't open '%s'", filename);
1677 return 0;
1678 }
1679 int i;
1680 for (i = 0; i < GraphTraceLen; i++) {
1681 fprintf(f, "%d\n", GraphBuffer[i]);
1682 }
1683 fclose(f);
1684 PrintAndLog("saved to '%s'", Cmd);
1685 return 0;
1686 }
1687
1688 int CmdScale(const char *Cmd)
1689 {
1690 CursorScaleFactor = atoi(Cmd);
1691 if (CursorScaleFactor == 0) {
1692 PrintAndLog("bad, can't have zero scale");
1693 CursorScaleFactor = 1;
1694 }
1695 RepaintGraphWindow();
1696 return 0;
1697 }
1698
1699 int CmdDirectionalThreshold(const char *Cmd)
1700 {
1701 int8_t upThres = param_get8(Cmd, 0);
1702 int8_t downThres = param_get8(Cmd, 1);
1703
1704 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1705
1706 int lastValue = GraphBuffer[0];
1707 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1708
1709 for (int i = 1; i < GraphTraceLen; ++i) {
1710 // Apply first threshold to samples heading up
1711 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
1712 {
1713 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1714 GraphBuffer[i] = 127;
1715 }
1716 // Apply second threshold to samples heading down
1717 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
1718 {
1719 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1720 GraphBuffer[i] = -127;
1721 }
1722 else
1723 {
1724 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1725 GraphBuffer[i] = GraphBuffer[i-1];
1726
1727 }
1728 }
1729 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
1730 RepaintGraphWindow();
1731 return 0;
1732 }
1733
1734 int CmdZerocrossings(const char *Cmd)
1735 {
1736 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1737 CmdHpf("");
1738
1739 int sign = 1;
1740 int zc = 0;
1741 int lastZc = 0;
1742
1743 for (int i = 0; i < GraphTraceLen; ++i) {
1744 if (GraphBuffer[i] * sign >= 0) {
1745 // No change in sign, reproduce the previous sample count.
1746 zc++;
1747 GraphBuffer[i] = lastZc;
1748 } else {
1749 // Change in sign, reset the sample count.
1750 sign = -sign;
1751 GraphBuffer[i] = lastZc;
1752 if (sign > 0) {
1753 lastZc = zc;
1754 zc = 0;
1755 }
1756 }
1757 }
1758
1759 RepaintGraphWindow();
1760 return 0;
1761 }
1762
1763 int usage_data_bin2hex(){
1764 PrintAndLog("Usage: data bin2hex <binary_digits>");
1765 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1766 return 0;
1767 }
1768
1769 /**
1770 * @brief Utility for conversion via cmdline.
1771 * @param Cmd
1772 * @return
1773 */
1774 int Cmdbin2hex(const char *Cmd)
1775 {
1776 int bg =0, en =0;
1777 if(param_getptr(Cmd, &bg, &en, 0))
1778 {
1779 return usage_data_bin2hex();
1780 }
1781 //Number of digits supplied as argument
1782 size_t length = en - bg +1;
1783 size_t bytelen = (length+7) / 8;
1784 uint8_t* arr = (uint8_t *) malloc(bytelen);
1785 memset(arr, 0, bytelen);
1786 BitstreamOut bout = { arr, 0, 0 };
1787
1788 for(; bg <= en ;bg++)
1789 {
1790 char c = Cmd[bg];
1791 if( c == '1') pushBit(&bout, 1);
1792 else if( c == '0') pushBit(&bout, 0);
1793 else PrintAndLog("Ignoring '%c'", c);
1794 }
1795
1796 if(bout.numbits % 8 != 0)
1797 {
1798 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1799 }
1800
1801 //Uses printf instead of PrintAndLog since the latter
1802 // adds linebreaks to each printout - this way was more convenient since we don't have to
1803 // allocate a string and write to that first...
1804 for(size_t x = 0; x < bytelen ; x++)
1805 {
1806 printf("%02X", arr[x]);
1807 }
1808 printf("\n");
1809 free(arr);
1810 return 0;
1811 }
1812
1813 int usage_data_hex2bin() {
1814 PrintAndLog("Usage: data hex2bin <hex_digits>");
1815 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1816 return 0;
1817
1818 }
1819
1820 int Cmdhex2bin(const char *Cmd)
1821 {
1822 int bg =0, en =0;
1823 if(param_getptr(Cmd, &bg, &en, 0))
1824 {
1825 return usage_data_hex2bin();
1826 }
1827
1828
1829 while(bg <= en )
1830 {
1831 char x = Cmd[bg++];
1832 // capitalize
1833 if (x >= 'a' && x <= 'f')
1834 x -= 32;
1835 // convert to numeric value
1836 if (x >= '0' && x <= '9')
1837 x -= '0';
1838 else if (x >= 'A' && x <= 'F')
1839 x -= 'A' - 10;
1840 else
1841 continue;
1842
1843 //Uses printf instead of PrintAndLog since the latter
1844 // adds linebreaks to each printout - this way was more convenient since we don't have to
1845 // allocate a string and write to that first...
1846
1847 for(int i= 0 ; i < 4 ; ++i)
1848 printf("%d",(x >> (3 - i)) & 1);
1849 }
1850 printf("\n");
1851
1852 return 0;
1853 }
1854
1855 static command_t CommandTable[] =
1856 {
1857 {"help", CmdHelp, 1, "This help"},
1858 {"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)"},
1859 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
1860 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking tag from GraphBuffer"},
1861 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
1862 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
1863 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
1864 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1865 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1866 {"dec", CmdDec, 1, "Decimate samples"},
1867 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
1868 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
1869 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
1870 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
1871 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1872 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1873 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1874 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
1875 {"hide", CmdHide, 1, "Hide graph window"},
1876 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1877 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1878 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1879 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1880 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
1881 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
1882 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1883 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1884 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
1885 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
1886 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
1887 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1888 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1889 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1890 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
1891 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1892 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
1893 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
1894 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1895 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1896 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1897 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1898 {NULL, NULL, 0, NULL}
1899 };
1900
1901 int CmdData(const char *Cmd)
1902 {
1903 CmdsParse(CommandTable, Cmd);
1904 return 0;
1905 }
1906
1907 int CmdHelp(const char *Cmd)
1908 {
1909 CmdsHelp(CommandTable);
1910 return 0;
1911 }
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