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