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ADD: AWID 50bit demod, thanks to @FrancoisM and @ntk
[proxmark3-svn] / client / cmddata.c
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 <limits.h> // for CmdNorm INT_MIN && INT_MAX
14 #include "data.h" // also included in util.h
15 #include "cmddata.h"
16 #include "util.h"
17 #include "cmdmain.h"
18 #include "proxmark3.h"
19 #include "ui.h" // for show graph controls
20 #include "graph.h" // for graph data
21 #include "cmdparser.h"// already included in cmdmain.h
22 #include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
23 #include "lfdemod.h" // for demod code
24 #include "crc.h" // for pyramid checksum maxim
25 #include "crc16.h" // for FDXB demod checksum
26 #include "loclass/cipherutils.h" // for decimating samples in getsamples
27
28 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
29 uint8_t g_debugMode=0;
30 size_t DemodBufferLen=0;
31 static int CmdHelp(const char *Cmd);
32
33 //set the demod buffer with given array of binary (one bit per byte)
34 //by marshmellow
35 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
36 {
37 if (buff == NULL)
38 return;
39
40 if ( size >= MAX_DEMOD_BUF_LEN)
41 size = MAX_DEMOD_BUF_LEN;
42
43 size_t i = 0;
44 for (; i < size; i++){
45 DemodBuffer[i]=buff[startIdx++];
46 }
47 DemodBufferLen=size;
48 return;
49 }
50
51 int CmdSetDebugMode(const char *Cmd)
52 {
53 int demod=0;
54 sscanf(Cmd, "%i", &demod);
55 g_debugMode=(uint8_t)demod;
56 return 1;
57 }
58
59 int usage_data_printdemodbuf(){
60 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
61 PrintAndLog("Options:");
62 PrintAndLog(" h This help");
63 PrintAndLog(" x output in hex (omit for binary output)");
64 PrintAndLog(" o <offset> enter offset in # of bits");
65 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
66 return 0;
67 }
68
69 //by marshmellow
70 void printDemodBuff(void)
71 {
72 int bitLen = DemodBufferLen;
73 if (bitLen<1) {
74 PrintAndLog("no bits found in demod buffer");
75 return;
76 }
77 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
78
79 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
80 PrintAndLog("%s",bin);
81
82 return;
83 }
84
85 int CmdPrintDemodBuff(const char *Cmd)
86 {
87 char hex[512]={0x00};
88 bool hexMode = false;
89 bool errors = false;
90 uint32_t offset = 0; //could be size_t but no param_get16...
91 uint32_t length = 512;
92 char cmdp = 0;
93 while(param_getchar(Cmd, cmdp) != 0x00)
94 {
95 switch(param_getchar(Cmd, cmdp))
96 {
97 case 'h':
98 case 'H':
99 return usage_data_printdemodbuf();
100 case 'x':
101 case 'X':
102 hexMode = true;
103 cmdp++;
104 break;
105 case 'o':
106 case 'O':
107 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
108 if (!offset) errors = true;
109 cmdp += 2;
110 break;
111 case 'l':
112 case 'L':
113 length = param_get32ex(Cmd, cmdp+1, 512, 10);
114 if (!length) errors = true;
115 cmdp += 2;
116 break;
117 default:
118 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
119 errors = true;
120 break;
121 }
122 if(errors) break;
123 }
124 //Validations
125 if(errors) return usage_data_printdemodbuf();
126 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
127 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
128
129 if (hexMode){
130 char *buf = (char *) (DemodBuffer + offset);
131 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
132 numBits = binarraytohex(hex, buf, numBits);
133 if (numBits==0) return 0;
134 PrintAndLog("DemodBuffer: %s",hex);
135 } else {
136 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
137 }
138 return 1;
139 }
140
141 //by marshmellow
142 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
143 int CmdGetBitStream(const char *Cmd)
144 {
145 int i;
146 CmdHpf(Cmd);
147 for (i = 0; i < GraphTraceLen; i++) {
148 if (GraphBuffer[i] >= 1) {
149 GraphBuffer[i] = 1;
150 } else {
151 GraphBuffer[i] = 0;
152 }
153 }
154 RepaintGraphWindow();
155 return 0;
156 }
157
158 //by marshmellow
159 //print 64 bit EM410x ID in multiple formats
160 void printEM410x(uint32_t hi, uint64_t id)
161 {
162 if (id || hi){
163 uint64_t iii=1;
164 uint64_t id2lo=0;
165 uint32_t ii=0;
166 uint32_t i=0;
167 for (ii=5; ii>0;ii--){
168 for (i=0;i<8;i++){
169 id2lo=(id2lo<<1LL) | ((id & (iii << (i+((ii-1)*8)))) >> (i+((ii-1)*8)));
170 }
171 }
172 if (hi){
173 //output 88 bit em id
174 PrintAndLog("\nEM TAG ID : %06X%016llX", hi, id);
175 } else{
176 //output 40 bit em id
177 PrintAndLog("\nEM TAG ID : %010llX", id);
178 PrintAndLog("Unique TAG ID : %010llX", id2lo);
179 PrintAndLog("\nPossible de-scramble patterns");
180 PrintAndLog("HoneyWell IdentKey {");
181 PrintAndLog("DEZ 8 : %08lld",id & 0xFFFFFF);
182 PrintAndLog("DEZ 10 : %010lld",id & 0xFFFFFFFF);
183 PrintAndLog("DEZ 5.5 : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
184 PrintAndLog("DEZ 3.5A : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
185 PrintAndLog("DEZ 3.5B : %03lld.%05lld",(id & 0xFF000000) >> 24,(id & 0xFFFF));
186 PrintAndLog("DEZ 3.5C : %03lld.%05lld",(id & 0xFF0000) >> 16,(id & 0xFFFF));
187 PrintAndLog("DEZ 14/IK2 : %014lld",id);
188 PrintAndLog("DEZ 15/IK3 : %015lld",id2lo);
189 PrintAndLog("DEZ 20/ZK : %02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld",
190 (id2lo & 0xf000000000) >> 36,
191 (id2lo & 0x0f00000000) >> 32,
192 (id2lo & 0x00f0000000) >> 28,
193 (id2lo & 0x000f000000) >> 24,
194 (id2lo & 0x0000f00000) >> 20,
195 (id2lo & 0x00000f0000) >> 16,
196 (id2lo & 0x000000f000) >> 12,
197 (id2lo & 0x0000000f00) >> 8,
198 (id2lo & 0x00000000f0) >> 4,
199 (id2lo & 0x000000000f)
200 );
201 uint64_t paxton = (((id>>32) << 24) | (id & 0xffffff)) + 0x143e00;
202 PrintAndLog("}\nOther : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
203 PrintAndLog("Pattern Paxton : %lld [0x%llX]", paxton, paxton);
204
205 uint32_t p1id = (id & 0xFFFFFF);
206 uint8_t arr[32] = {0x00};
207 int i =0;
208 int j = 23;
209 for (; i < 24; ++i, --j ){
210 arr[i] = (p1id >> i) & 1;
211 }
212
213 uint32_t p1 = 0;
214
215 p1 |= arr[23] << 21;
216 p1 |= arr[22] << 23;
217 p1 |= arr[21] << 20;
218 p1 |= arr[20] << 22;
219
220 p1 |= arr[19] << 18;
221 p1 |= arr[18] << 16;
222 p1 |= arr[17] << 19;
223 p1 |= arr[16] << 17;
224
225 p1 |= arr[15] << 13;
226 p1 |= arr[14] << 15;
227 p1 |= arr[13] << 12;
228 p1 |= arr[12] << 14;
229
230 p1 |= arr[11] << 6;
231 p1 |= arr[10] << 2;
232 p1 |= arr[9] << 7;
233 p1 |= arr[8] << 1;
234
235 p1 |= arr[7] << 0;
236 p1 |= arr[6] << 8;
237 p1 |= arr[5] << 11;
238 p1 |= arr[4] << 3;
239
240 p1 |= arr[3] << 10;
241 p1 |= arr[2] << 4;
242 p1 |= arr[1] << 5;
243 p1 |= arr[0] << 9;
244 PrintAndLog("Pattern 1 : %d [0x%X]", p1, p1);
245
246 uint16_t sebury1 = id & 0xFFFF;
247 uint8_t sebury2 = (id >> 16) & 0x7F;
248 uint32_t sebury3 = id & 0x7FFFFF;
249 PrintAndLog("Pattern Sebury : %d %d %d [0x%X 0x%X 0x%X]", sebury1, sebury2, sebury3, sebury1, sebury2, sebury3);
250 }
251 }
252 return;
253 }
254
255 int AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )
256 {
257 size_t idx = 0;
258 size_t BitLen = DemodBufferLen;
259 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
260 memcpy(BitStream, DemodBuffer, BitLen);
261 if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)){
262 //set GraphBuffer for clone or sim command
263 setDemodBuf(BitStream, BitLen, idx);
264 if (g_debugMode){
265 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
266 printDemodBuff();
267 }
268 if (verbose){
269 PrintAndLog("EM410x pattern found: ");
270 printEM410x(*hi, *lo);
271 }
272 return 1;
273 }
274 return 0;
275 }
276
277 int AskEm410xDemod(const char *Cmd, uint32_t *hi, uint64_t *lo, bool verbose)
278 {
279 bool st = TRUE;
280 if (!ASKDemod_ext(Cmd, FALSE, FALSE, 1, &st)) return 0;
281 return AskEm410xDecode(verbose, hi, lo);
282 }
283
284 //by marshmellow
285 //takes 3 arguments - clock, invert and maxErr as integers
286 //attempts to demodulate ask while decoding manchester
287 //prints binary found and saves in graphbuffer for further commands
288 int CmdAskEM410xDemod(const char *Cmd)
289 {
290 char cmdp = param_getchar(Cmd, 0);
291 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
292 PrintAndLog("Usage: data askem410xdemod [clock] <0|1> [maxError]");
293 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
294 PrintAndLog(" <invert>, 1 for invert output");
295 PrintAndLog(" [set maximum allowed errors], default = 100.");
296 PrintAndLog("");
297 PrintAndLog(" sample: data askem410xdemod = demod an EM410x Tag ID from GraphBuffer");
298 PrintAndLog(" : data askem410xdemod 32 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32");
299 PrintAndLog(" : data askem410xdemod 32 1 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32 and inverting data");
300 PrintAndLog(" : data askem410xdemod 1 = demod an EM410x Tag ID from GraphBuffer while inverting data");
301 PrintAndLog(" : data askem410xdemod 64 1 0 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/64 and inverting data and allowing 0 demod errors");
302 return 0;
303 }
304 uint64_t lo = 0;
305 uint32_t hi = 0;
306 return AskEm410xDemod(Cmd, &hi, &lo, true);
307 }
308
309 //by marshmellow
310 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
311 // (amp may not be needed anymore)
312 //verbose will print results and demoding messages
313 //emSearch will auto search for EM410x format in bitstream
314 //askType switches decode: ask/raw = 0, ask/manchester = 1
315 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
316 int invert=0;
317 int clk=0;
318 int maxErr=100;
319 int maxLen=0;
320 uint8_t askAmp = 0;
321 char amp = param_getchar(Cmd, 0);
322 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
323 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
324 if (!maxLen) maxLen = BIGBUF_SIZE;
325 if (invert != 0 && invert != 1) {
326 PrintAndLog("Invalid argument: %s", Cmd);
327 return 0;
328 }
329 if (clk==1){
330 invert=1;
331 clk=0;
332 }
333 if (amp == 'a' || amp == 'A') askAmp=1;
334 size_t BitLen = getFromGraphBuf(BitStream);
335 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
336 if (BitLen<255) return 0;
337 if (maxLen<BitLen && maxLen != 0) BitLen = maxLen;
338 int foundclk = 0;
339 bool st = false;
340 if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk);
341 if (st) {
342 *stCheck = st;
343 clk = (clk == 0) ? foundclk : clk;
344 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator");
345 }
346 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askAmp, askType);
347 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
348 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
349 return 0;
350 }
351 if (errCnt>maxErr){
352 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
353 return 0;
354 }
355 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
356
357 //output
358 setDemodBuf(BitStream,BitLen,0);
359 if (verbose || g_debugMode){
360 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
361 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
362 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
363 // Now output the bitstream to the scrollback by line of 16 bits
364 printDemodBuff();
365
366 }
367 uint64_t lo = 0;
368 uint32_t hi = 0;
369 if (emSearch){
370 AskEm410xDecode(true, &hi, &lo);
371 }
372 return 1;
373 }
374 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
375 bool st = false;
376 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
377 }
378
379 //by marshmellow
380 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
381 //attempts to demodulate ask while decoding manchester
382 //prints binary found and saves in graphbuffer for further commands
383 int Cmdaskmandemod(const char *Cmd)
384 {
385 char cmdp = param_getchar(Cmd, 0);
386 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
387 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
388 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
389 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
390 PrintAndLog(" <invert>, 1 to invert output");
391 PrintAndLog(" [set maximum allowed errors], default = 100");
392 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
393 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
394 PrintAndLog("");
395 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
396 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
397 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
398 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
399 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");
400 return 0;
401 }
402 bool st = TRUE;
403 if (Cmd[0]=='s')
404 return ASKDemod_ext(Cmd++, TRUE, TRUE, 1, &st);
405 else if (Cmd[1] == 's')
406 return ASKDemod_ext(Cmd+=2, TRUE, TRUE, 1, &st);
407 else
408 return ASKDemod(Cmd, TRUE, TRUE, 1);
409 }
410
411 //by marshmellow
412 //manchester decode
413 //stricktly take 10 and 01 and convert to 0 and 1
414 int Cmdmandecoderaw(const char *Cmd)
415 {
416 int i =0;
417 int errCnt=0;
418 size_t size=0;
419 int invert=0;
420 int maxErr = 20;
421 char cmdp = param_getchar(Cmd, 0);
422 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
423 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
424 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
425 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
426 PrintAndLog(" [invert] invert output");
427 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
428 PrintAndLog("");
429 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
430 return 0;
431 }
432 if (DemodBufferLen==0) return 0;
433 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
434 int high=0,low=0;
435 for (;i<DemodBufferLen;++i){
436 if (DemodBuffer[i]>high) high=DemodBuffer[i];
437 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
438 BitStream[i]=DemodBuffer[i];
439 }
440 if (high>7 || low <0 ){
441 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
442 return 0;
443 }
444
445 sscanf(Cmd, "%i %i", &invert, &maxErr);
446 size=i;
447 errCnt=manrawdecode(BitStream, &size, invert);
448 if (errCnt>=maxErr){
449 PrintAndLog("Too many errors: %d",errCnt);
450 return 0;
451 }
452 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
453 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
454 if (errCnt==0){
455 uint64_t id = 0;
456 uint32_t hi = 0;
457 size_t idx=0;
458 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
459 //need to adjust to set bitstream back to manchester encoded data
460 //setDemodBuf(BitStream, size, idx);
461
462 printEM410x(hi, id);
463 }
464 }
465 return 1;
466 }
467
468 //by marshmellow
469 //biphase decode
470 //take 01 or 10 = 0 and 11 or 00 = 1
471 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
472 // and "invert" default = 0 if 1 it will invert output
473 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
474 int CmdBiphaseDecodeRaw(const char *Cmd)
475 {
476 size_t size=0;
477 int offset=0, invert=0, maxErr=20, errCnt=0;
478 char cmdp = param_getchar(Cmd, 0);
479 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
480 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
481 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
482 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
483 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
484 PrintAndLog("");
485 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
486 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
487 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
488 PrintAndLog("");
489 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
490 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
491 return 0;
492 }
493 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
494 if (DemodBufferLen==0){
495 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
496 return 0;
497 }
498 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
499 memcpy(BitStream, DemodBuffer, DemodBufferLen);
500 size = DemodBufferLen;
501 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
502 if (errCnt<0){
503 PrintAndLog("Error during decode:%d", errCnt);
504 return 0;
505 }
506 if (errCnt>maxErr){
507 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
508 return 0;
509 }
510
511 if (errCnt>0){
512 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
513 }
514 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
515 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
516
517 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
518 return 1;
519 }
520
521 //by marshmellow
522 // - ASK Demod then Biphase decode GraphBuffer samples
523 int ASKbiphaseDemod(const char *Cmd, bool verbose)
524 {
525 //ask raw demod GraphBuffer first
526 int offset=0, clk=0, invert=0, maxErr=0;
527 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
528
529 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
530 size_t size = getFromGraphBuf(BitStream);
531 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
532 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
533 if ( errCnt < 0 || errCnt > maxErr ) {
534 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
535 return 0;
536 }
537
538 //attempt to Biphase decode BitStream
539 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
540 if (errCnt < 0){
541 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
542 return 0;
543 }
544 if (errCnt > maxErr) {
545 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
546 return 0;
547 }
548 //success set DemodBuffer and return
549 setDemodBuf(BitStream, size, 0);
550 if (g_debugMode || verbose){
551 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
552 printDemodBuff();
553 }
554 return 1;
555 }
556 //by marshmellow - see ASKbiphaseDemod
557 int Cmdaskbiphdemod(const char *Cmd)
558 {
559 char cmdp = param_getchar(Cmd, 0);
560 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
561 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
562 PrintAndLog(" [offset], offset to begin biphase, default=0");
563 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
564 PrintAndLog(" <invert>, 1 to invert output");
565 PrintAndLog(" [set maximum allowed errors], default = 100");
566 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
567 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
568 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
569 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
570 PrintAndLog(" NOTE: any other arg must have previous args set to work");
571 PrintAndLog("");
572 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
573 PrintAndLog("");
574 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
575 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
576 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
577 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
578 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
579 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");
580 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");
581 return 0;
582 }
583 return ASKbiphaseDemod(Cmd, TRUE);
584 }
585
586 //by marshmellow
587 //attempts to demodulate and identify a G_Prox_II verex/chubb card
588 //WARNING: if it fails during some points it will destroy the DemodBuffer data
589 // but will leave the GraphBuffer intact.
590 //if successful it will push askraw data back to demod buffer ready for emulation
591 int CmdG_Prox_II_Demod(const char *Cmd)
592 {
593 if (!ASKbiphaseDemod(Cmd, FALSE)){
594 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
595 return 0;
596 }
597 size_t size = DemodBufferLen;
598 //call lfdemod.c demod for gProxII
599 int ans = gProxII_Demod(DemodBuffer, &size);
600 if (ans < 0){
601 if (g_debugMode) PrintAndLog("Error gProxII_Demod");
602 return 0;
603 }
604 //got a good demod of 96 bits
605 uint8_t ByteStream[8] = {0x00};
606 uint8_t xorKey=0;
607 size_t startIdx = ans + 6; //start after 6 bit preamble
608
609 uint8_t bits_no_spacer[90];
610 //so as to not mess with raw DemodBuffer copy to a new sample array
611 memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
612 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
613 size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
614 if (bitLen != 72) {
615 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
616 return 0;
617 }
618 // get key and then get all 8 bytes of payload decoded
619 xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
620 for (size_t idx = 0; idx < 8; idx++) {
621 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
622 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
623 }
624 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
625 //
626 uint8_t fmtLen = ByteStream[0]>>2;
627 uint32_t FC = 0;
628 uint32_t Card = 0;
629 //get raw 96 bits to print
630 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
631 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
632 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
633
634 if (fmtLen==36){
635 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
636 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
637 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
638 } else if(fmtLen==26){
639 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
640 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
641 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
642 } else {
643 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
644 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
645 }
646 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
647 setDemodBuf(DemodBuffer+ans, 96, 0);
648 return 1;
649 }
650
651 //by marshmellow
652 //see ASKDemod for what args are accepted
653 int CmdVikingDemod(const char *Cmd)
654 {
655 if (!ASKDemod(Cmd, false, false, 1)) {
656 if (g_debugMode) PrintAndLog("ASKDemod failed");
657 return 0;
658 }
659 size_t size = DemodBufferLen;
660 //call lfdemod.c demod for Viking
661 int ans = VikingDemod_AM(DemodBuffer, &size);
662 if (ans < 0) {
663 if (g_debugMode) PrintAndLog("Error Viking_Demod %d %s", ans, (ans == -5)?"[chksum error]":"");
664 return 0;
665 }
666 //got a good demod
667 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
668 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
669 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
670 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
671 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, checksum);
672 PrintAndLog("Raw: %08X%08X", raw1,raw2);
673 setDemodBuf(DemodBuffer+ans, 64, 0);
674 return 1;
675 }
676
677 //by marshmellow - see ASKDemod
678 int Cmdaskrawdemod(const char *Cmd)
679 {
680 char cmdp = param_getchar(Cmd, 0);
681 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
682 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
683 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
684 PrintAndLog(" <invert>, 1 to invert output");
685 PrintAndLog(" [set maximum allowed errors], default = 100");
686 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
687 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
688 PrintAndLog("");
689 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
690 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
691 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
692 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
693 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
694 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");
695 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");
696 return 0;
697 }
698 return ASKDemod(Cmd, TRUE, FALSE, 0);
699 }
700
701 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
702 {
703 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
704 size_t Correlation = 0;
705 int maxSum = 0;
706 int lastMax = 0;
707 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
708 for (int i = 0; i < GraphTraceLen - window; ++i) {
709 int sum = 0;
710 for (int j = 0; j < window; ++j) {
711 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
712 }
713 CorrelBuffer[i] = sum;
714 if (sum >= maxSum-100 && sum <= maxSum+100){
715 //another max
716 Correlation = i-lastMax;
717 lastMax = i;
718 if (sum > maxSum) maxSum = sum;
719 } else if (sum > maxSum){
720 maxSum=sum;
721 lastMax = i;
722 }
723 }
724 if (Correlation==0){
725 //try again with wider margin
726 for (int i = 0; i < GraphTraceLen - window; i++){
727 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
728 //another max
729 Correlation = i-lastMax;
730 lastMax = i;
731 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
732 }
733 }
734 }
735 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
736
737 if (SaveGrph){
738 GraphTraceLen = GraphTraceLen - window;
739 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
740 RepaintGraphWindow();
741 }
742 return Correlation;
743 }
744
745 int usage_data_autocorr(void)
746 {
747 //print help
748 PrintAndLog("Usage: data autocorr [window] [g]");
749 PrintAndLog("Options: ");
750 PrintAndLog(" h This help");
751 PrintAndLog(" [window] window length for correlation - default = 4000");
752 PrintAndLog(" g save back to GraphBuffer (overwrite)");
753 return 0;
754 }
755
756 int CmdAutoCorr(const char *Cmd)
757 {
758 char cmdp = param_getchar(Cmd, 0);
759 if (cmdp == 'h' || cmdp == 'H') return usage_data_autocorr();
760 int window = 4000; //set default
761 char grph=0;
762 bool updateGrph = FALSE;
763 sscanf(Cmd, "%i %c", &window, &grph);
764
765 if (window >= GraphTraceLen) {
766 PrintAndLog("window must be smaller than trace (%d samples)",
767 GraphTraceLen);
768 return 0;
769 }
770 if (grph == 'g') updateGrph=TRUE;
771 return AutoCorrelate(window, updateGrph, TRUE);
772 }
773
774 int CmdBitsamples(const char *Cmd)
775 {
776 int cnt = 0;
777 uint8_t got[12288];
778
779 GetFromBigBuf(got,sizeof(got),0);
780 WaitForResponse(CMD_ACK,NULL);
781
782 for (int j = 0; j < sizeof(got); j++) {
783 for (int k = 0; k < 8; k++) {
784 if(got[j] & (1 << (7 - k))) {
785 GraphBuffer[cnt++] = 1;
786 } else {
787 GraphBuffer[cnt++] = 0;
788 }
789 }
790 }
791 GraphTraceLen = cnt;
792 RepaintGraphWindow();
793 return 0;
794 }
795
796 int CmdBuffClear(const char *Cmd)
797 {
798 UsbCommand c = {CMD_BUFF_CLEAR};
799 SendCommand(&c);
800 ClearGraph(true);
801 return 0;
802 }
803
804 int CmdDec(const char *Cmd)
805 {
806 for (int i = 0; i < (GraphTraceLen / 2); ++i)
807 GraphBuffer[i] = GraphBuffer[i * 2];
808 GraphTraceLen /= 2;
809 PrintAndLog("decimated by 2");
810 RepaintGraphWindow();
811 return 0;
812 }
813 /**
814 * Undecimate - I'd call it 'interpolate', but we'll save that
815 * name until someone does an actual interpolation command, not just
816 * blindly repeating samples
817 * @param Cmd
818 * @return
819 */
820 int CmdUndec(const char *Cmd)
821 {
822 if(param_getchar(Cmd, 0) == 'h')
823 {
824 PrintAndLog("Usage: data undec [factor]");
825 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
826 PrintAndLog("Options: ");
827 PrintAndLog(" h This help");
828 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
829 PrintAndLog("Example: 'data undec 3'");
830 return 0;
831 }
832
833 uint8_t factor = param_get8ex(Cmd, 0, 2, 10);
834 //We have memory, don't we?
835 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
836 uint32_t g_index = 0 ,s_index = 0;
837 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
838 {
839 int count = 0;
840 for (count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
841 swap[s_index+count] = GraphBuffer[g_index];
842 s_index += count;
843 g_index++;
844 }
845
846 memcpy(GraphBuffer, swap, s_index * sizeof(int));
847 GraphTraceLen = s_index;
848 RepaintGraphWindow();
849 return 0;
850 }
851
852 //by marshmellow
853 //shift graph zero up or down based on input + or -
854 int CmdGraphShiftZero(const char *Cmd)
855 {
856
857 int shift=0;
858 //set options from parameters entered with the command
859 sscanf(Cmd, "%i", &shift);
860 int shiftedVal=0;
861 for(int i = 0; i<GraphTraceLen; i++){
862 shiftedVal=GraphBuffer[i]+shift;
863 if (shiftedVal>127)
864 shiftedVal=127;
865 else if (shiftedVal<-127)
866 shiftedVal=-127;
867 GraphBuffer[i]= shiftedVal;
868 }
869 CmdNorm("");
870 return 0;
871 }
872
873 //by marshmellow
874 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
875 //similar to dirtheshold, threshold commands
876 //takes a threshold length which is the measured length between two samples then determines an edge
877 int CmdAskEdgeDetect(const char *Cmd)
878 {
879 int thresLen = 25;
880 sscanf(Cmd, "%i", &thresLen);
881
882 for(int i = 1; i<GraphTraceLen; i++){
883 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
884 GraphBuffer[i-1] = 127;
885 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
886 GraphBuffer[i-1] = -127;
887 }
888 RepaintGraphWindow();
889 return 0;
890 }
891
892 /* Print our clock rate */
893 // uses data from graphbuffer
894 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
895 int CmdDetectClockRate(const char *Cmd)
896 {
897 char cmdp = param_getchar(Cmd, 0);
898 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
899 PrintAndLog("Usage: data detectclock [modulation] <clock>");
900 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
901 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
902 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
903 PrintAndLog("");
904 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
905 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
906 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
907 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
908 }
909 int ans=0;
910 if (cmdp == 'a'){
911 ans = GetAskClock(Cmd+1, true, false);
912 } else if (cmdp == 'f'){
913 ans = GetFskClock("", true, false);
914 } else if (cmdp == 'n'){
915 ans = GetNrzClock("", true, false);
916 } else if (cmdp == 'p'){
917 ans = GetPskClock("", true, false);
918 } else {
919 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
920 }
921 return ans;
922 }
923
924 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
925 {
926 static char fType[8];
927 memset(fType, 0x00, 8);
928 char *fskType = fType;
929 if (fchigh==10 && fclow==8){
930 if (invert) //fsk2a
931 memcpy(fskType, "FSK2a", 5);
932 else //fsk2
933 memcpy(fskType, "FSK2", 4);
934 } else if (fchigh == 8 && fclow == 5) {
935 if (invert)
936 memcpy(fskType, "FSK1", 4);
937 else
938 memcpy(fskType, "FSK1a", 5);
939 } else {
940 memcpy(fskType, "FSK??", 5);
941 }
942 return fskType;
943 }
944
945 //by marshmellow
946 //fsk raw demod and print binary
947 //takes 4 arguments - Clock, invert, fchigh, fclow
948 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
949 int FSKrawDemod(const char *Cmd, bool verbose)
950 {
951 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
952 uint8_t rfLen, invert, fchigh, fclow;
953
954 //set defaults
955 //set options from parameters entered with the command
956 rfLen = param_get8(Cmd, 0);
957 invert = param_get8(Cmd, 1);
958 fchigh = param_get8(Cmd, 2);
959 fclow = param_get8(Cmd, 3);
960 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
961 if (rfLen==1) {
962 invert = 1; //if invert option only is used
963 rfLen = 0;
964 }
965 }
966
967 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
968 size_t BitLen = getFromGraphBuf(BitStream);
969 if (BitLen==0) return 0;
970 //get field clock lengths
971 uint16_t fcs=0;
972 if (!fchigh || !fclow) {
973 fcs = countFC(BitStream, BitLen, 1);
974 if (!fcs) {
975 fchigh = 10;
976 fclow = 8;
977 } else {
978 fchigh = (fcs >> 8) & 0x00FF;
979 fclow = fcs & 0x00FF;
980 }
981 }
982 //get bit clock length
983 if (!rfLen) {
984 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
985 if (!rfLen) rfLen = 50;
986 }
987 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
988 if (size > 0) {
989 setDemodBuf(BitStream, size, 0);
990
991 // Now output the bitstream to the scrollback by line of 16 bits
992 if (verbose || g_debugMode) {
993 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
994 PrintAndLog("%s decoded bitstream:", GetFSKType(fchigh, fclow, invert));
995 printDemodBuff();
996 }
997
998 return 1;
999 } else {
1000 if (g_debugMode) PrintAndLog("no FSK data found");
1001 }
1002 return 0;
1003 }
1004
1005 //by marshmellow
1006 //fsk raw demod and print binary
1007 //takes 4 arguments - Clock, invert, fchigh, fclow
1008 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
1009 int CmdFSKrawdemod(const char *Cmd)
1010 {
1011 char cmdp = param_getchar(Cmd, 0);
1012 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1013 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
1014 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
1015 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
1016 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
1017 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
1018 PrintAndLog("");
1019 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
1020 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
1021 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
1022 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
1023 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
1024 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
1025 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
1026 return 0;
1027 }
1028 return FSKrawDemod(Cmd, TRUE);
1029 }
1030
1031 //by marshmellow (based on existing demod + holiman's refactor)
1032 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
1033 //print full HID Prox ID and some bit format details if found
1034 int CmdFSKdemodHID(const char *Cmd)
1035 {
1036 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1037 uint32_t hi2=0, hi=0, lo=0;
1038
1039 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1040 size_t BitLen = getFromGraphBuf(BitStream);
1041 if (BitLen==0) return 0;
1042 //get binary from fsk wave
1043 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1044 if (idx<0){
1045 if (g_debugMode){
1046 if (idx==-1){
1047 PrintAndLog("DEBUG: Just Noise Detected");
1048 } else if (idx == -2) {
1049 PrintAndLog("DEBUG: Error demoding fsk");
1050 } else if (idx == -3) {
1051 PrintAndLog("DEBUG: Preamble not found");
1052 } else if (idx == -4) {
1053 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
1054 } else {
1055 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1056 }
1057 }
1058 return 0;
1059 }
1060 if (hi2==0 && hi==0 && lo==0) {
1061 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
1062 return 0;
1063 }
1064 if (hi2 != 0){ //extra large HID tags
1065 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
1066 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
1067 }
1068 else { //standard HID tags <38 bits
1069 uint8_t fmtLen = 0;
1070 uint32_t fc = 0;
1071 uint32_t cardnum = 0;
1072 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
1073 uint32_t lo2=0;
1074 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
1075 uint8_t idx3 = 1;
1076 while(lo2>1){ //find last bit set to 1 (format len bit)
1077 lo2=lo2>>1;
1078 idx3++;
1079 }
1080 fmtLen =idx3+19;
1081 fc =0;
1082 cardnum=0;
1083 if(fmtLen==26){
1084 cardnum = (lo>>1)&0xFFFF;
1085 fc = (lo>>17)&0xFF;
1086 }
1087 if(fmtLen==34){
1088 cardnum = (lo>>1)&0xFFFF;
1089 fc= ((hi&1)<<15)|(lo>>17);
1090 }
1091 if(fmtLen==35){
1092 cardnum = (lo>>1)&0xFFFFF;
1093 fc = ((hi&1)<<11)|(lo>>21);
1094 }
1095 }
1096 else { //if bit 38 is not set then 37 bit format is used
1097 fmtLen = 37;
1098 fc = 0;
1099 cardnum = 0;
1100 if(fmtLen == 37){
1101 cardnum = (lo>>1)&0x7FFFF;
1102 fc = ((hi&0xF)<<12)|(lo>>20);
1103 }
1104 }
1105 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
1106 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
1107 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
1108 }
1109 setDemodBuf(BitStream,BitLen,idx);
1110 if (g_debugMode){
1111 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
1112 printDemodBuff();
1113 }
1114 return 1;
1115 }
1116
1117 //by marshmellow
1118 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
1119 //print full Paradox Prox ID and some bit format details if found
1120 int CmdFSKdemodParadox(const char *Cmd)
1121 {
1122 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1123 uint32_t hi2=0, hi=0, lo=0;
1124
1125 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1126 size_t BitLen = getFromGraphBuf(BitStream);
1127 if (BitLen==0) return 0;
1128 //get binary from fsk wave
1129 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1130 if (idx<0){
1131 if (g_debugMode){
1132 if (idx==-1){
1133 PrintAndLog("DEBUG: Just Noise Detected");
1134 } else if (idx == -2) {
1135 PrintAndLog("DEBUG: Error demoding fsk");
1136 } else if (idx == -3) {
1137 PrintAndLog("DEBUG: Preamble not found");
1138 } else if (idx == -4) {
1139 PrintAndLog("DEBUG: Error in Manchester data");
1140 } else {
1141 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1142 }
1143 }
1144 return 0;
1145 }
1146 if (hi2==0 && hi==0 && lo==0){
1147 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1148 return 0;
1149 }
1150 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1151 uint32_t cardnum = (lo>>10)&0xFFFF;
1152 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1153 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1154 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1155
1156 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1157 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
1158 setDemodBuf(BitStream,BitLen,idx);
1159 if (g_debugMode){
1160 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1161 printDemodBuff();
1162 }
1163 return 1;
1164 }
1165
1166 //by marshmellow
1167 //IO-Prox demod - FSK RF/64 with preamble of 000000001
1168 //print ioprox ID and some format details
1169 int CmdFSKdemodIO(const char *Cmd)
1170 {
1171 int idx=0;
1172 //something in graphbuffer?
1173 if (GraphTraceLen < 65) {
1174 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1175 return 0;
1176 }
1177 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1178 size_t BitLen = getFromGraphBuf(BitStream);
1179 if (BitLen==0) return 0;
1180
1181 //get binary from fsk wave
1182 idx = IOdemodFSK(BitStream,BitLen);
1183 if (idx<0){
1184 if (g_debugMode){
1185 if (idx==-1){
1186 PrintAndLog("DEBUG: Just Noise Detected");
1187 } else if (idx == -2) {
1188 PrintAndLog("DEBUG: not enough samples");
1189 } else if (idx == -3) {
1190 PrintAndLog("DEBUG: error during fskdemod");
1191 } else if (idx == -4) {
1192 PrintAndLog("DEBUG: Preamble not found");
1193 } else if (idx == -5) {
1194 PrintAndLog("DEBUG: Separator bits not found");
1195 } else {
1196 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1197 }
1198 }
1199 return 0;
1200 }
1201 if (idx==0){
1202 if (g_debugMode){
1203 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1204 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
1205 }
1206 return 0;
1207 }
1208 //Index map
1209 //0 10 20 30 40 50 60
1210 //| | | | | | |
1211 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1212 //-----------------------------------------------------------------------------
1213 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1214 //
1215 //XSF(version)facility:codeone+codetwo (raw)
1216 //Handle the data
1217 if (idx+64>BitLen) {
1218 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1219 return 0;
1220 }
1221 PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx], BitStream[idx+1], BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
1222 PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9], BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
1223 PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
1224 PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
1225 PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
1226 PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
1227 PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
1228
1229 uint32_t code = bytebits_to_byte(BitStream+idx,32);
1230 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
1231 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1232 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
1233 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
1234 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
1235 uint16_t calccrc = 0;
1236
1237 for (uint8_t i=1; i<6; ++i){
1238 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
1239 }
1240 calccrc &= 0xff;
1241 calccrc = 0xff - calccrc;
1242
1243 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
1244
1245 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
1246 setDemodBuf(BitStream,64,idx);
1247 if (g_debugMode){
1248 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1249 printDemodBuff();
1250 }
1251 return 1;
1252 }
1253
1254 //by marshmellow
1255 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1256 //print full AWID Prox ID and some bit format details if found
1257 int CmdFSKdemodAWID(const char *Cmd)
1258 {
1259 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1260 size_t size = getFromGraphBuf(BitStream);
1261 if (size==0) return 0;
1262
1263 //get binary from fsk wave
1264 int idx = AWIDdemodFSK(BitStream, &size);
1265 if (idx<=0){
1266 if (g_debugMode){
1267 if (idx == -1)
1268 PrintAndLog("DEBUG: Error - not enough samples");
1269 else if (idx == -2)
1270 PrintAndLog("DEBUG: Error - only noise found");
1271 else if (idx == -3)
1272 PrintAndLog("DEBUG: Error - problem during FSK demod");
1273 else if (idx == -4)
1274 PrintAndLog("DEBUG: Error - AWID preamble not found");
1275 else if (idx == -5)
1276 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1277 else
1278 PrintAndLog("DEBUG: Error %d",idx);
1279 }
1280 return 0;
1281 }
1282
1283 // Index map
1284 // 0 10 20 30 40 50 60
1285 // | | | | | | |
1286 // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
1287 // -----------------------------------------------------------------------------
1288 // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
1289 // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
1290 // |---26 bit---| |-----117----||-------------142-------------|
1291 // b = format bit len, o = odd parity of last 3 bits
1292 // f = facility code, c = card number
1293 // w = wiegand parity
1294 // (26 bit format shown)
1295
1296 //get raw ID before removing parities
1297 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1298 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1299 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1300 setDemodBuf(BitStream,96,idx);
1301
1302 size = removeParity(BitStream, idx+8, 4, 1, 88);
1303 if (size != 66){
1304 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1305 return 0;
1306 }
1307 // ok valid card found!
1308
1309 // Index map
1310 // 0 10 20 30 40 50 60
1311 // | | | | | | |
1312 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1313 // -----------------------------------------------------------------------------
1314 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1315 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1316 // |26 bit| |-117--| |-----142------|
1317 //
1318 // 00110010 0 0000011111010000000000000001000100101000100001111 0 00000000
1319 // bbbbbbbb w ffffffffffffffffccccccccccccccccccccccccccccccccc w xxxxxxxx
1320 // |50 bit| |----4000------||-----------2248975-------------|
1321 // b = format bit len, o = odd parity of last 3 bits
1322 // f = facility code, c = card number
1323 // w = wiegand parity
1324
1325 uint32_t fc = 0;
1326 uint32_t cardnum = 0;
1327 uint32_t code1 = 0;
1328 uint32_t code2 = 0;
1329 uint8_t fmtLen = bytebits_to_byte(BitStream, 8);
1330 switch(fmtLen) {
1331 case 26:
1332 fc = bytebits_to_byte(BitStream + 9, 8);
1333 cardnum = bytebits_to_byte(BitStream + 17, 16);
1334 code1 = bytebits_to_byte(BitStream + 8,fmtLen);
1335 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1336 break;
1337 case 50:
1338 fc = bytebits_to_byte(BitStream + 9, 16);
1339 cardnum = bytebits_to_byte(BitStream + 25, 32);
1340 code1 = bytebits_to_byte(BitStream + 8, (fmtLen-32) );
1341 code2 = bytebits_to_byte(BitStream + 8 + (fmtLen-32), 32);
1342 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1343 break;
1344 default:
1345 if (fmtLen > 32 ) {
1346 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1347 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1348 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
1349 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1350 } else {
1351 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1352 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1353 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1354 }
1355 break;
1356 }
1357
1358 if (g_debugMode){
1359 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1360 printDemodBuff();
1361 }
1362 return 1;
1363 }
1364
1365 //by marshmellow
1366 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1367 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1368 int CmdFSKdemodPyramid(const char *Cmd)
1369 {
1370 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1371 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1372 size_t size = getFromGraphBuf(BitStream);
1373 if (size==0) return 0;
1374
1375 //get binary from fsk wave
1376 int idx = PyramiddemodFSK(BitStream, &size);
1377 if (idx < 0){
1378 if (g_debugMode){
1379 if (idx == -5)
1380 PrintAndLog("DEBUG: Error - not enough samples");
1381 else if (idx == -1)
1382 PrintAndLog("DEBUG: Error - only noise found");
1383 else if (idx == -2)
1384 PrintAndLog("DEBUG: Error - problem during FSK demod");
1385 else if (idx == -3)
1386 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1387 else if (idx == -4)
1388 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1389 else
1390 PrintAndLog("DEBUG: Error - idx: %d",idx);
1391 }
1392 return 0;
1393 }
1394 // Index map
1395 // 0 10 20 30 40 50 60
1396 // | | | | | | |
1397 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1398 // -----------------------------------------------------------------------------
1399 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1400 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1401
1402 // 64 70 80 90 100 110 120
1403 // | | | | | | |
1404 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1405 // -----------------------------------------------------------------------------
1406 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1407 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1408 // |---115---||---------71---------|
1409 // s = format start bit, o = odd parity of last 7 bits
1410 // f = facility code, c = card number
1411 // w = wiegand parity, x = extra space for other formats
1412 // p = CRC8maxim checksum
1413 // (26 bit format shown)
1414
1415 //get bytes for checksum calc
1416 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
1417 uint8_t csBuff[14] = {0x00};
1418 for (uint8_t i = 0; i < 13; i++){
1419 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
1420 }
1421 //check checksum calc
1422 //checksum calc thanks to ICEMAN!!
1423 uint32_t checkCS = CRC8Maxim(csBuff,13);
1424
1425 //get raw ID before removing parities
1426 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1427 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1428 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1429 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
1430 setDemodBuf(BitStream,128,idx);
1431
1432 size = removeParity(BitStream, idx+8, 8, 1, 120);
1433 if (size != 105){
1434 if (g_debugMode)
1435 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1436 return 0;
1437 }
1438
1439 // ok valid card found!
1440
1441 // Index map
1442 // 0 10 20 30 40 50 60 70
1443 // | | | | | | | |
1444 // 01234567890123456789012345678901234567890123456789012345678901234567890
1445 // -----------------------------------------------------------------------
1446 // 00000000000000000000000000000000000000000000000000000000000000000000000
1447 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1448
1449 // 71 80 90 100
1450 // | | | |
1451 // 1 2 34567890 1234567890123456 7 8901234
1452 // ---------------------------------------
1453 // 1 1 01110011 0000000001000110 0 1001010
1454 // s w ffffffff cccccccccccccccc w ppppppp
1455 // |--115-| |------71------|
1456 // s = format start bit, o = odd parity of last 7 bits
1457 // f = facility code, c = card number
1458 // w = wiegand parity, x = extra space for other formats
1459 // p = CRC8-Maxim checksum
1460 // (26 bit format shown)
1461
1462 //find start bit to get fmtLen
1463 int j;
1464 for (j=0; j < size; ++j){
1465 if(BitStream[j]) break;
1466 }
1467
1468 uint8_t fmtLen = size-j-8;
1469 uint32_t fc = 0;
1470 uint32_t cardnum = 0;
1471 uint32_t code1 = 0;
1472
1473 if ( fmtLen == 26 ){
1474 fc = bytebits_to_byte(BitStream+73, 8);
1475 cardnum = bytebits_to_byte(BitStream+81, 16);
1476 code1 = bytebits_to_byte(BitStream+72,fmtLen);
1477 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi3, rawHi2, rawHi, rawLo);
1478 } else if (fmtLen == 45) {
1479 fmtLen = 42; //end = 10 bits not 7 like 26 bit fmt
1480 fc = bytebits_to_byte(BitStream+53, 10);
1481 cardnum = bytebits_to_byte(BitStream+63, 32);
1482 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1483 } else {
1484 cardnum = bytebits_to_byte(BitStream+81, 16);
1485 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1486 }
1487 if (checksum == checkCS)
1488 PrintAndLog("Checksum %02x passed", checksum);
1489 else
1490 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
1491
1492 if (g_debugMode){
1493 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1494 printDemodBuff();
1495 }
1496 return 1;
1497 }
1498
1499 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
1500 // 8 databits + 1 parity (1)
1501 // CIITT 16 chksum
1502 // NATIONAL CODE, ICAR database
1503 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
1504 // FLAG (animal/non-animal)
1505 /*
1506 38 IDbits
1507 10 country code
1508 1 extra app bit
1509 14 reserved bits
1510 1 animal bit
1511 16 ccitt CRC chksum over 64bit ID CODE.
1512 24 appli bits.
1513
1514 -- sample: 985121004515220 [ 37FF65B88EF94 ]
1515 */
1516 int CmdFDXBdemodBI(const char *Cmd){
1517
1518 int invert = 1;
1519 int clk = 32;
1520 int errCnt = 0;
1521 int maxErr = 0;
1522 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
1523 size_t size = getFromGraphBuf(BitStream);
1524
1525 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
1526 if ( errCnt < 0 || errCnt > maxErr ) {
1527 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
1528 return 0;
1529 }
1530
1531 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
1532 if (errCnt < 0 || errCnt > maxErr ) {
1533 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
1534 return 0;
1535 }
1536
1537 int preambleIndex = FDXBdemodBI(BitStream, &size);
1538 if (preambleIndex < 0){
1539 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
1540 return 0;
1541 }
1542 if (size != 128) {
1543 if (g_debugMode) PrintAndLog("Error incorrect data length found");
1544 return 0;
1545 }
1546
1547 setDemodBuf(BitStream, 128, preambleIndex);
1548
1549 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
1550 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
1551 if ( size != 104 ) {
1552 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1553 return 0;
1554 }
1555 if (g_debugMode) {
1556 char *bin = sprint_bin_break(BitStream,size,16);
1557 PrintAndLog("DEBUG BinStream:\n%s",bin);
1558 }
1559 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1560 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1561
1562 //got a good demod
1563 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1564 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1565 uint8_t dataBlockBit = BitStream[48];
1566 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1567 uint8_t animalBit = BitStream[63];
1568 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1569 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1570
1571 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1572 uint8_t raw[8];
1573 num_to_bytes(rawid, 8, raw);
1574
1575 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1576
1577 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1578 PrintAndLog("Animal ID: %04u-%012llu", countryCode, NationalCode);
1579 PrintAndLog("National Code: %012llu", NationalCode);
1580 PrintAndLog("CountryCode: %04u", countryCode);
1581 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1582 PrintAndLog("reserved Code: %u", reservedCode);
1583 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1584 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1585 PrintAndLog("Extended: 0x%X\n", extended);
1586
1587 return 1;
1588 }
1589
1590
1591 //by marshmellow
1592 //attempt to psk1 demod graph buffer
1593 int PSKDemod(const char *Cmd, bool verbose)
1594 {
1595 int invert=0;
1596 int clk=0;
1597 int maxErr=100;
1598 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1599 if (clk==1){
1600 invert=1;
1601 clk=0;
1602 }
1603 if (invert != 0 && invert != 1) {
1604 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1605 return 0;
1606 }
1607 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1608 size_t BitLen = getFromGraphBuf(BitStream);
1609 if (BitLen==0) return 0;
1610 uint8_t carrier=countFC(BitStream, BitLen, 0);
1611 if (carrier!=2 && carrier!=4 && carrier!=8){
1612 //invalid carrier
1613 return 0;
1614 }
1615 if (g_debugMode){
1616 PrintAndLog("Carrier: rf/%d",carrier);
1617 }
1618 int errCnt=0;
1619 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1620 if (errCnt > maxErr){
1621 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1622 return 0;
1623 }
1624 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1625 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1626 return 0;
1627 }
1628 if (verbose || g_debugMode){
1629 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1630 if (errCnt>0){
1631 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1632 }
1633 }
1634 //prime demod buffer for output
1635 setDemodBuf(BitStream,BitLen,0);
1636 return 1;
1637 }
1638
1639 // Indala 26 bit decode
1640 // by marshmellow
1641 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1642 int CmdIndalaDecode(const char *Cmd)
1643 {
1644 int ans;
1645 if (strlen(Cmd)>0){
1646 ans = PSKDemod(Cmd, 0);
1647 } else{ //default to RF/32
1648 ans = PSKDemod("32", 0);
1649 }
1650
1651 if (!ans){
1652 if (g_debugMode)
1653 PrintAndLog("Error1: %d",ans);
1654 return 0;
1655 }
1656 uint8_t invert=0;
1657 size_t size = DemodBufferLen;
1658 int startIdx = indala26decode(DemodBuffer, &size, &invert);
1659 if (startIdx < 0 || size > 224) {
1660 if (g_debugMode)
1661 PrintAndLog("Error2: %d",ans);
1662 return -1;
1663 }
1664 setDemodBuf(DemodBuffer, size, (size_t)startIdx);
1665 if (invert)
1666 if (g_debugMode)
1667 PrintAndLog("Had to invert bits");
1668
1669 PrintAndLog("BitLen: %d",DemodBufferLen);
1670 //convert UID to HEX
1671 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1672 uid1=bytebits_to_byte(DemodBuffer,32);
1673 uid2=bytebits_to_byte(DemodBuffer+32,32);
1674 if (DemodBufferLen==64){
1675 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1676 } else {
1677 uid3=bytebits_to_byte(DemodBuffer+64,32);
1678 uid4=bytebits_to_byte(DemodBuffer+96,32);
1679 uid5=bytebits_to_byte(DemodBuffer+128,32);
1680 uid6=bytebits_to_byte(DemodBuffer+160,32);
1681 uid7=bytebits_to_byte(DemodBuffer+192,32);
1682 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1683 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1684 }
1685 if (g_debugMode){
1686 PrintAndLog("DEBUG: printing demodbuffer:");
1687 printDemodBuff();
1688 }
1689 return 1;
1690 }
1691
1692 int CmdPSKNexWatch(const char *Cmd)
1693 {
1694 if (!PSKDemod("", false)) return 0;
1695 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};
1696 size_t startIdx = 0, size = DemodBufferLen;
1697 bool invert = false;
1698 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1699 // if didn't find preamble try again inverting
1700 if (!PSKDemod("1", false)) return 0;
1701 size = DemodBufferLen;
1702 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1703 invert = true;
1704 }
1705 if (size != 128) return 0;
1706 setDemodBuf(DemodBuffer, size, startIdx+4);
1707 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1708 //get ID
1709 uint32_t ID = 0;
1710 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1711 for (uint8_t idx=0; idx<8; idx++){
1712 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1713 }
1714 }
1715 //parity check (TBD)
1716
1717 //checksum check (TBD)
1718
1719 //output
1720 PrintAndLog("NexWatch ID: %d", ID);
1721 if (invert){
1722 PrintAndLog("Had to Invert - probably NexKey");
1723 for (uint8_t idx=0; idx<size; idx++)
1724 DemodBuffer[idx] ^= 1;
1725 }
1726
1727 CmdPrintDemodBuff("x");
1728 return 1;
1729 }
1730
1731 // by marshmellow
1732 // takes 3 arguments - clock, invert, maxErr as integers
1733 // attempts to demodulate nrz only
1734 // prints binary found and saves in demodbuffer for further commands
1735 int NRZrawDemod(const char *Cmd, bool verbose)
1736 {
1737 int invert=0;
1738 int clk=0;
1739 int maxErr=100;
1740 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1741 if (clk==1){
1742 invert=1;
1743 clk=0;
1744 }
1745 if (invert != 0 && invert != 1) {
1746 PrintAndLog("Invalid argument: %s", Cmd);
1747 return 0;
1748 }
1749 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1750 size_t BitLen = getFromGraphBuf(BitStream);
1751 if (BitLen==0) return 0;
1752 int errCnt=0;
1753 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
1754 if (errCnt > maxErr){
1755 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1756 return 0;
1757 }
1758 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1759 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1760 return 0;
1761 }
1762 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1763 //prime demod buffer for output
1764 setDemodBuf(BitStream,BitLen,0);
1765
1766 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1767 if (verbose || g_debugMode) {
1768 PrintAndLog("NRZ demoded bitstream:");
1769 // Now output the bitstream to the scrollback by line of 16 bits
1770 printDemodBuff();
1771 }
1772 return 1;
1773 }
1774
1775 int CmdNRZrawDemod(const char *Cmd)
1776 {
1777 char cmdp = param_getchar(Cmd, 0);
1778 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1779 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1780 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1781 PrintAndLog(" <invert>, 1 for invert output");
1782 PrintAndLog(" [set maximum allowed errors], default = 100.");
1783 PrintAndLog("");
1784 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1785 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1786 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1787 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1788 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");
1789 return 0;
1790 }
1791 return NRZrawDemod(Cmd, TRUE);
1792 }
1793
1794 // by marshmellow
1795 // takes 3 arguments - clock, invert, maxErr as integers
1796 // attempts to demodulate psk only
1797 // prints binary found and saves in demodbuffer for further commands
1798 int CmdPSK1rawDemod(const char *Cmd)
1799 {
1800 int ans;
1801 char cmdp = param_getchar(Cmd, 0);
1802 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1803 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1804 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1805 PrintAndLog(" <invert>, 1 for invert output");
1806 PrintAndLog(" [set maximum allowed errors], default = 100.");
1807 PrintAndLog("");
1808 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1809 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1810 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1811 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1812 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");
1813 return 0;
1814 }
1815 ans = PSKDemod(Cmd, TRUE);
1816 //output
1817 if (!ans){
1818 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1819 return 0;
1820 }
1821
1822 PrintAndLog("PSK1 demoded bitstream:");
1823 // Now output the bitstream to the scrollback by line of 16 bits
1824 printDemodBuff();
1825 return 1;
1826 }
1827
1828 // by marshmellow
1829 // takes same args as cmdpsk1rawdemod
1830 int CmdPSK2rawDemod(const char *Cmd)
1831 {
1832 int ans=0;
1833 char cmdp = param_getchar(Cmd, 0);
1834 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1835 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1836 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1837 PrintAndLog(" <invert>, 1 for invert output");
1838 PrintAndLog(" [set maximum allowed errors], default = 100.");
1839 PrintAndLog("");
1840 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1841 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1842 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1843 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1844 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");
1845 return 0;
1846 }
1847 ans=PSKDemod(Cmd, TRUE);
1848 if (!ans){
1849 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1850 return 0;
1851 }
1852 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1853 PrintAndLog("PSK2 demoded bitstream:");
1854 // Now output the bitstream to the scrollback by line of 16 bits
1855 printDemodBuff();
1856 return 1;
1857 }
1858
1859 // by marshmellow - combines all raw demod functions into one menu command
1860 int CmdRawDemod(const char *Cmd)
1861 {
1862 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1863
1864 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1865 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1866 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1867 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1868 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1869 PrintAndLog(" <options> see specific modulation help for optional parameters");
1870 PrintAndLog("");
1871 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1872 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1873 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1874 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1875 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1876 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1877 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1878 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1879 return 0;
1880 }
1881 char cmdp2 = Cmd[1];
1882 int ans = 0;
1883 if (cmdp == 'f' && cmdp2 == 's'){
1884 ans = CmdFSKrawdemod(Cmd+2);
1885 } else if(cmdp == 'a' && cmdp2 == 'b'){
1886 ans = Cmdaskbiphdemod(Cmd+2);
1887 } else if(cmdp == 'a' && cmdp2 == 'm'){
1888 ans = Cmdaskmandemod(Cmd+2);
1889 } else if(cmdp == 'a' && cmdp2 == 'r'){
1890 ans = Cmdaskrawdemod(Cmd+2);
1891 } else if(cmdp == 'n' && cmdp2 == 'r'){
1892 ans = CmdNRZrawDemod(Cmd+2);
1893 } else if(cmdp == 'p' && cmdp2 == '1'){
1894 ans = CmdPSK1rawDemod(Cmd+2);
1895 } else if(cmdp == 'p' && cmdp2 == '2'){
1896 ans = CmdPSK2rawDemod(Cmd+2);
1897 } else {
1898 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1899 }
1900 return ans;
1901 }
1902
1903 int CmdGrid(const char *Cmd)
1904 {
1905 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1906 PlotGridXdefault= PlotGridX;
1907 PlotGridYdefault= PlotGridY;
1908 RepaintGraphWindow();
1909 return 0;
1910 }
1911
1912 int CmdHexsamples(const char *Cmd)
1913 {
1914 int i, j;
1915 int requested = 0;
1916 int offset = 0;
1917 char string_buf[25];
1918 char* string_ptr = string_buf;
1919 uint8_t got[BIGBUF_SIZE];
1920
1921 sscanf(Cmd, "%i %i", &requested, &offset);
1922
1923 /* if no args send something */
1924 if (requested == 0) {
1925 requested = 8;
1926 }
1927 if (offset + requested > sizeof(got)) {
1928 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1929 return 0;
1930 }
1931
1932 GetFromBigBuf(got,requested,offset);
1933 WaitForResponse(CMD_ACK,NULL);
1934
1935 i = 0;
1936 for (j = 0; j < requested; j++) {
1937 i++;
1938 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1939 if (i == 8) {
1940 *(string_ptr - 1) = '\0'; // remove the trailing space
1941 PrintAndLog("%s", string_buf);
1942 string_buf[0] = '\0';
1943 string_ptr = string_buf;
1944 i = 0;
1945 }
1946 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1947 *(string_ptr - 1) = '\0';
1948 PrintAndLog("%s", string_buf);
1949 string_buf[0] = '\0';
1950 }
1951 }
1952 return 0;
1953 }
1954
1955 int CmdHide(const char *Cmd)
1956 {
1957 HideGraphWindow();
1958 return 0;
1959 }
1960
1961 //zero mean GraphBuffer
1962 int CmdHpf(const char *Cmd)
1963 {
1964 int i;
1965 int accum = 0;
1966
1967 for (i = 10; i < GraphTraceLen; ++i)
1968 accum += GraphBuffer[i];
1969 accum /= (GraphTraceLen - 10);
1970 for (i = 0; i < GraphTraceLen; ++i)
1971 GraphBuffer[i] -= accum;
1972
1973 RepaintGraphWindow();
1974 return 0;
1975 }
1976
1977 bool _headBit( BitstreamOut *stream)
1978 {
1979 int bytepos = stream->position >> 3; // divide by 8
1980 int bitpos = (stream->position++) & 7; // mask out 00000111
1981 return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
1982 }
1983
1984 uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
1985 {
1986 int i;
1987 uint8_t val = 0;
1988 for(i =0 ; i < bits_per_sample; i++)
1989 {
1990 val |= (_headBit(b) << (7-i));
1991 }
1992 return val;
1993 }
1994
1995 int getSamples(const char *Cmd, bool silent)
1996 {
1997 //If we get all but the last byte in bigbuf,
1998 // we don't have to worry about remaining trash
1999 // in the last byte in case the bits-per-sample
2000 // does not line up on byte boundaries
2001
2002 uint8_t got[BIGBUF_SIZE-1] = { 0 };
2003
2004 int n = strtol(Cmd, NULL, 0);
2005
2006 if ( n == 0 || n > sizeof(got))
2007 n = sizeof(got);
2008
2009 PrintAndLog("Reading %d bytes from device memory\n", n);
2010 GetFromBigBuf(got,n,0);
2011 PrintAndLog("Data fetched");
2012 UsbCommand response;
2013 if ( !WaitForResponseTimeout(CMD_ACK, &response, 10000) ) {
2014 PrintAndLog("timeout while waiting for reply.");
2015 return 1;
2016 }
2017
2018 uint8_t bits_per_sample = 8;
2019
2020 //Old devices without this feature would send 0 at arg[0]
2021 if(response.arg[0] > 0)
2022 {
2023 sample_config *sc = (sample_config *) response.d.asBytes;
2024 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample, sc->decimation);
2025 bits_per_sample = sc->bits_per_sample;
2026 }
2027 if(bits_per_sample < 8)
2028 {
2029 PrintAndLog("Unpacking...");
2030 BitstreamOut bout = { got, bits_per_sample * n, 0};
2031 int j =0;
2032 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
2033 uint8_t sample = getByte(bits_per_sample, &bout);
2034 GraphBuffer[j] = ((int) sample )- 128;
2035 }
2036 GraphTraceLen = j;
2037 PrintAndLog("Unpacked %d samples" , j );
2038 }else
2039 {
2040 for (int j = 0; j < n; j++) {
2041 GraphBuffer[j] = ((int)got[j]) - 128;
2042 }
2043 GraphTraceLen = n;
2044 }
2045
2046 RepaintGraphWindow();
2047 return 0;
2048 }
2049
2050 int CmdSamples(const char *Cmd)
2051 {
2052 return getSamples(Cmd, false);
2053 }
2054
2055 int CmdTuneSamples(const char *Cmd)
2056 {
2057 int timeout = 0;
2058 printf("\nMeasuring antenna characteristics, please wait...");
2059
2060 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {0,0,0}};
2061 clearCommandBuffer();
2062 SendCommand(&c);
2063 UsbCommand resp;
2064 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING, &resp, 2000)) {
2065 timeout++;
2066 printf(".");
2067 if (timeout > 7) {
2068 PrintAndLog("\nNo response from Proxmark. Aborting...");
2069 return 1;
2070 }
2071 }
2072
2073 int peakv, peakf;
2074 int vLf125, vLf134, vHf;
2075 vLf125 = resp.arg[0] & 0xffff;
2076 vLf134 = resp.arg[0] >> 16;
2077 vHf = resp.arg[1] & 0xffff;;
2078 peakf = resp.arg[2] & 0xffff;
2079 peakv = resp.arg[2] >> 16;
2080 PrintAndLog("");
2081 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
2082 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
2083 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
2084 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
2085
2086 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
2087 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
2088 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2089 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2090
2091 if (peakv < LF_UNUSABLE_V)
2092 PrintAndLog("# Your LF antenna is unusable.");
2093 else if (peakv < LF_MARGINAL_V)
2094 PrintAndLog("# Your LF antenna is marginal.");
2095 if (vHf < HF_UNUSABLE_V)
2096 PrintAndLog("# Your HF antenna is unusable.");
2097 else if (vHf < HF_MARGINAL_V)
2098 PrintAndLog("# Your HF antenna is marginal.");
2099
2100 if (peakv >= LF_UNUSABLE_V) {
2101 for (int i = 0; i < 256; i++) {
2102 GraphBuffer[i] = resp.d.asBytes[i] - 128;
2103 }
2104 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
2105 PrintAndLog("\n");
2106 GraphTraceLen = 256;
2107 ShowGraphWindow();
2108 RepaintGraphWindow();
2109 }
2110 return 0;
2111 }
2112
2113
2114 int CmdLoad(const char *Cmd)
2115 {
2116 char filename[FILE_PATH_SIZE] = {0x00};
2117 int len = 0;
2118
2119 len = strlen(Cmd);
2120 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2121 memcpy(filename, Cmd, len);
2122
2123 FILE *f = fopen(filename, "r");
2124 if (!f) {
2125 PrintAndLog("couldn't open '%s'", filename);
2126 return 0;
2127 }
2128
2129 GraphTraceLen = 0;
2130 char line[80];
2131 while (fgets(line, sizeof (line), f)) {
2132 GraphBuffer[GraphTraceLen] = atoi(line);
2133 GraphTraceLen++;
2134 }
2135 fclose(f);
2136 PrintAndLog("loaded %d samples", GraphTraceLen);
2137 RepaintGraphWindow();
2138 return 0;
2139 }
2140
2141 int CmdLtrim(const char *Cmd)
2142 {
2143 int ds = atoi(Cmd);
2144
2145 if (GraphTraceLen <= 0) return 0;
2146
2147 for (int i = ds; i < GraphTraceLen; ++i)
2148 GraphBuffer[i-ds] = GraphBuffer[i];
2149
2150 GraphTraceLen -= ds;
2151 RepaintGraphWindow();
2152 return 0;
2153 }
2154
2155 // trim graph to input argument length
2156 int CmdRtrim(const char *Cmd)
2157 {
2158 int ds = atoi(Cmd);
2159 GraphTraceLen = ds;
2160 RepaintGraphWindow();
2161 return 0;
2162 }
2163
2164 int CmdNorm(const char *Cmd)
2165 {
2166 int i;
2167 int max = INT_MIN, min = INT_MAX;
2168
2169 for (i = 10; i < GraphTraceLen; ++i) {
2170 if (GraphBuffer[i] > max)
2171 max = GraphBuffer[i];
2172 if (GraphBuffer[i] < min)
2173 min = GraphBuffer[i];
2174 }
2175
2176 if (max != min) {
2177 for (i = 0; i < GraphTraceLen; ++i) {
2178 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
2179 (max - min);
2180 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
2181 }
2182 }
2183 RepaintGraphWindow();
2184 return 0;
2185 }
2186
2187 int CmdPlot(const char *Cmd)
2188 {
2189 ShowGraphWindow();
2190 return 0;
2191 }
2192
2193 int CmdSave(const char *Cmd)
2194 {
2195 char filename[FILE_PATH_SIZE] = {0x00};
2196 int len = 0;
2197
2198 len = strlen(Cmd);
2199 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2200 memcpy(filename, Cmd, len);
2201
2202
2203 FILE *f = fopen(filename, "w");
2204 if(!f) {
2205 PrintAndLog("couldn't open '%s'", filename);
2206 return 0;
2207 }
2208 int i;
2209 for (i = 0; i < GraphTraceLen; i++) {
2210 fprintf(f, "%d\n", GraphBuffer[i]);
2211 }
2212 fclose(f);
2213 PrintAndLog("saved to '%s'", Cmd);
2214 return 0;
2215 }
2216
2217 int CmdScale(const char *Cmd)
2218 {
2219 CursorScaleFactor = atoi(Cmd);
2220 if (CursorScaleFactor == 0) {
2221 PrintAndLog("bad, can't have zero scale");
2222 CursorScaleFactor = 1;
2223 }
2224 RepaintGraphWindow();
2225 return 0;
2226 }
2227
2228 int CmdDirectionalThreshold(const char *Cmd)
2229 {
2230 int8_t upThres = param_get8(Cmd, 0);
2231 int8_t downThres = param_get8(Cmd, 1);
2232
2233 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
2234
2235 int lastValue = GraphBuffer[0];
2236 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
2237
2238 for (int i = 1; i < GraphTraceLen; ++i) {
2239 // Apply first threshold to samples heading up
2240 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2241 {
2242 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2243 GraphBuffer[i] = 1;
2244 }
2245 // Apply second threshold to samples heading down
2246 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2247 {
2248 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2249 GraphBuffer[i] = -1;
2250 }
2251 else
2252 {
2253 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2254 GraphBuffer[i] = GraphBuffer[i-1];
2255
2256 }
2257 }
2258 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2259 RepaintGraphWindow();
2260 return 0;
2261 }
2262
2263 int CmdZerocrossings(const char *Cmd)
2264 {
2265 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2266 CmdHpf("");
2267
2268 int sign = 1;
2269 int zc = 0;
2270 int lastZc = 0;
2271
2272 for (int i = 0; i < GraphTraceLen; ++i) {
2273 if (GraphBuffer[i] * sign >= 0) {
2274 // No change in sign, reproduce the previous sample count.
2275 zc++;
2276 GraphBuffer[i] = lastZc;
2277 } else {
2278 // Change in sign, reset the sample count.
2279 sign = -sign;
2280 GraphBuffer[i] = lastZc;
2281 if (sign > 0) {
2282 lastZc = zc;
2283 zc = 0;
2284 }
2285 }
2286 }
2287
2288 RepaintGraphWindow();
2289 return 0;
2290 }
2291
2292 int usage_data_bin2hex(){
2293 PrintAndLog("Usage: data bin2hex <binary_digits>");
2294 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
2295 return 0;
2296 }
2297
2298 /**
2299 * @brief Utility for conversion via cmdline.
2300 * @param Cmd
2301 * @return
2302 */
2303 int Cmdbin2hex(const char *Cmd)
2304 {
2305 int bg =0, en =0;
2306 if(param_getptr(Cmd, &bg, &en, 0))
2307 {
2308 return usage_data_bin2hex();
2309 }
2310 //Number of digits supplied as argument
2311 size_t length = en - bg +1;
2312 size_t bytelen = (length+7) / 8;
2313 uint8_t* arr = (uint8_t *) malloc(bytelen);
2314 memset(arr, 0, bytelen);
2315 BitstreamOut bout = { arr, 0, 0 };
2316
2317 for(; bg <= en ;bg++)
2318 {
2319 char c = Cmd[bg];
2320 if( c == '1') pushBit(&bout, 1);
2321 else if( c == '0') pushBit(&bout, 0);
2322 else PrintAndLog("Ignoring '%c'", c);
2323 }
2324
2325 if(bout.numbits % 8 != 0)
2326 {
2327 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
2328 }
2329
2330 //Uses printf instead of PrintAndLog since the latter
2331 // adds linebreaks to each printout - this way was more convenient since we don't have to
2332 // allocate a string and write to that first...
2333 for(size_t x = 0; x < bytelen ; x++)
2334 {
2335 printf("%02X", arr[x]);
2336 }
2337 printf("\n");
2338 free(arr);
2339 return 0;
2340 }
2341
2342 int usage_data_hex2bin(){
2343 PrintAndLog("Usage: data hex2bin <hex_digits>");
2344 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
2345 return 0;
2346 }
2347
2348 int Cmdhex2bin(const char *Cmd)
2349 {
2350 int bg =0, en =0;
2351 if(param_getptr(Cmd, &bg, &en, 0)) return usage_data_hex2bin();
2352
2353 while(bg <= en )
2354 {
2355 char x = Cmd[bg++];
2356 // capitalize
2357 if (x >= 'a' && x <= 'f')
2358 x -= 32;
2359 // convert to numeric value
2360 if (x >= '0' && x <= '9')
2361 x -= '0';
2362 else if (x >= 'A' && x <= 'F')
2363 x -= 'A' - 10;
2364 else
2365 continue;
2366
2367 //Uses printf instead of PrintAndLog since the latter
2368 // adds linebreaks to each printout - this way was more convenient since we don't have to
2369 // allocate a string and write to that first...
2370
2371 for(int i= 0 ; i < 4 ; ++i)
2372 printf("%d",(x >> (3 - i)) & 1);
2373 }
2374 printf("\n");
2375
2376 return 0;
2377 }
2378
2379 int CmdDataIIR(const char *Cmd){
2380 iceIIR_Butterworth(GraphBuffer, GraphTraceLen);
2381 RepaintGraphWindow();
2382 return 0;
2383 }
2384
2385 static command_t CommandTable[] =
2386 {
2387 {"help", CmdHelp, 1, "This help"},
2388 {"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)"},
2389 {"askem410xdemod", CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
2390 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
2391 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking AM tag from GraphBuffer"},
2392 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
2393 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
2394 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
2395 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
2396 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2397 {"dec", CmdDec, 1, "Decimate samples"},
2398 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
2399 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
2400 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
2401 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
2402 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2403 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2404 {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2405 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
2406 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
2407 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
2408 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
2409 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
2410 {"hide", CmdHide, 1, "Hide graph window"},
2411 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
2412 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2413 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
2414 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
2415 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
2416 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
2417 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
2418 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
2419 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
2420 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
2421 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2422 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
2423 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2424 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
2425 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
2426 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
2427 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2428 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
2429 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
2430 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
2431 {"iir", CmdDataIIR, 0, "apply IIR buttersworth filter on plotdata"},
2432 {NULL, NULL, 0, NULL}
2433 };
2434
2435 int CmdData(const char *Cmd){
2436 clearCommandBuffer();
2437 CmdsParse(CommandTable, Cmd);
2438 return 0;
2439 }
2440
2441 int CmdHelp(const char *Cmd)
2442 {
2443 CmdsHelp(CommandTable);
2444 return 0;
2445 }
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