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add psk to em4x05 reads and tweak psk demod
[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 size_t BitLen = getFromGraphBuf(BitStream);
334 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
335 if (BitLen < 255) return 0;
336 if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
337 int foundclk = 0;
338 //amp before ST check
339 if (amp == 'a' || amp == 'A') {
340 askAmp(BitStream, BitLen);
341 }
342 bool st = false;
343 if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk);
344 if (st) {
345 *stCheck = st;
346 clk = (clk == 0) ? foundclk : clk;
347 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator");
348 }
349 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);
350 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
351 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
352 return 0;
353 }
354 if (errCnt > maxErr){
355 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
356 return 0;
357 }
358 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
359
360 //output
361 setDemodBuf(BitStream,BitLen,0);
362 if (verbose || g_debugMode){
363 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
364 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
365 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
366 // Now output the bitstream to the scrollback by line of 16 bits
367 printDemodBuff();
368
369 }
370 uint64_t lo = 0;
371 uint32_t hi = 0;
372 if (emSearch){
373 AskEm410xDecode(true, &hi, &lo);
374 }
375 return 1;
376 }
377 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
378 bool st = false;
379 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
380 }
381
382 //by marshmellow
383 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
384 //attempts to demodulate ask while decoding manchester
385 //prints binary found and saves in graphbuffer for further commands
386 int Cmdaskmandemod(const char *Cmd)
387 {
388 char cmdp = param_getchar(Cmd, 0);
389 if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
390 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
391 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
392 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
393 PrintAndLog(" <invert>, 1 to invert output");
394 PrintAndLog(" [set maximum allowed errors], default = 100");
395 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
396 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
397 PrintAndLog("");
398 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
399 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
400 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
401 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
402 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");
403 return 0;
404 }
405 bool st = TRUE;
406 if (Cmd[0]=='s')
407 return ASKDemod_ext(Cmd++, TRUE, TRUE, 1, &st);
408 else if (Cmd[1] == 's')
409 return ASKDemod_ext(Cmd+=2, TRUE, TRUE, 1, &st);
410 else
411 return ASKDemod(Cmd, TRUE, TRUE, 1);
412 }
413
414 //by marshmellow
415 //manchester decode
416 //stricktly take 10 and 01 and convert to 0 and 1
417 int Cmdmandecoderaw(const char *Cmd)
418 {
419 int i =0;
420 int errCnt=0;
421 size_t size=0;
422 int invert=0;
423 int maxErr = 20;
424 char cmdp = param_getchar(Cmd, 0);
425 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
426 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
427 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
428 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
429 PrintAndLog(" [invert] invert output");
430 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
431 PrintAndLog("");
432 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
433 return 0;
434 }
435 if (DemodBufferLen==0) return 0;
436 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
437 int high=0,low=0;
438 for (;i<DemodBufferLen;++i){
439 if (DemodBuffer[i]>high) high=DemodBuffer[i];
440 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
441 BitStream[i]=DemodBuffer[i];
442 }
443 if (high>7 || low <0 ){
444 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
445 return 0;
446 }
447
448 sscanf(Cmd, "%i %i", &invert, &maxErr);
449 size=i;
450 errCnt=manrawdecode(BitStream, &size, invert);
451 if (errCnt>=maxErr){
452 PrintAndLog("Too many errors: %d",errCnt);
453 return 0;
454 }
455 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
456 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
457 if (errCnt==0){
458 uint64_t id = 0;
459 uint32_t hi = 0;
460 size_t idx=0;
461 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
462 //need to adjust to set bitstream back to manchester encoded data
463 //setDemodBuf(BitStream, size, idx);
464
465 printEM410x(hi, id);
466 }
467 }
468 return 1;
469 }
470
471 //by marshmellow
472 //biphase decode
473 //take 01 or 10 = 0 and 11 or 00 = 1
474 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
475 // and "invert" default = 0 if 1 it will invert output
476 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
477 int CmdBiphaseDecodeRaw(const char *Cmd)
478 {
479 size_t size=0;
480 int offset=0, invert=0, maxErr=20, errCnt=0;
481 char cmdp = param_getchar(Cmd, 0);
482 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
483 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
484 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
485 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
486 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
487 PrintAndLog("");
488 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
489 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
490 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
491 PrintAndLog("");
492 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
493 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
494 return 0;
495 }
496 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
497 if (DemodBufferLen==0){
498 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
499 return 0;
500 }
501 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
502 memcpy(BitStream, DemodBuffer, DemodBufferLen);
503 size = DemodBufferLen;
504 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
505 if (errCnt<0){
506 PrintAndLog("Error during decode:%d", errCnt);
507 return 0;
508 }
509 if (errCnt>maxErr){
510 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
511 return 0;
512 }
513
514 if (errCnt>0){
515 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
516 }
517 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
518 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
519
520 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
521 return 1;
522 }
523
524 //by marshmellow
525 // - ASK Demod then Biphase decode GraphBuffer samples
526 int ASKbiphaseDemod(const char *Cmd, bool verbose)
527 {
528 //ask raw demod GraphBuffer first
529 int offset=0, clk=0, invert=0, maxErr=0;
530 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
531
532 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
533 size_t size = getFromGraphBuf(BitStream);
534 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
535 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
536 if ( errCnt < 0 || errCnt > maxErr ) {
537 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
538 return 0;
539 }
540
541 //attempt to Biphase decode BitStream
542 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
543 if (errCnt < 0){
544 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
545 return 0;
546 }
547 if (errCnt > maxErr) {
548 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
549 return 0;
550 }
551 //success set DemodBuffer and return
552 setDemodBuf(BitStream, size, 0);
553 if (g_debugMode || verbose){
554 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
555 printDemodBuff();
556 }
557 return 1;
558 }
559 //by marshmellow - see ASKbiphaseDemod
560 int Cmdaskbiphdemod(const char *Cmd)
561 {
562 char cmdp = param_getchar(Cmd, 0);
563 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
564 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
565 PrintAndLog(" [offset], offset to begin biphase, default=0");
566 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
567 PrintAndLog(" <invert>, 1 to invert output");
568 PrintAndLog(" [set maximum allowed errors], default = 100");
569 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
570 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
571 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
572 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
573 PrintAndLog(" NOTE: any other arg must have previous args set to work");
574 PrintAndLog("");
575 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
576 PrintAndLog("");
577 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
578 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
579 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
580 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
581 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
582 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");
583 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");
584 return 0;
585 }
586 return ASKbiphaseDemod(Cmd, TRUE);
587 }
588
589 //by marshmellow
590 //attempts to demodulate and identify a G_Prox_II verex/chubb card
591 //WARNING: if it fails during some points it will destroy the DemodBuffer data
592 // but will leave the GraphBuffer intact.
593 //if successful it will push askraw data back to demod buffer ready for emulation
594 int CmdG_Prox_II_Demod(const char *Cmd)
595 {
596 if (!ASKbiphaseDemod(Cmd, FALSE)){
597 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
598 return 0;
599 }
600 size_t size = DemodBufferLen;
601 //call lfdemod.c demod for gProxII
602 int ans = gProxII_Demod(DemodBuffer, &size);
603 if (ans < 0){
604 if (g_debugMode) PrintAndLog("Error gProxII_Demod");
605 return 0;
606 }
607 //got a good demod of 96 bits
608 uint8_t ByteStream[8] = {0x00};
609 uint8_t xorKey=0;
610 size_t startIdx = ans + 6; //start after 6 bit preamble
611
612 uint8_t bits_no_spacer[90];
613 //so as to not mess with raw DemodBuffer copy to a new sample array
614 memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
615 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
616 size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
617 if (bitLen != 72) {
618 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
619 return 0;
620 }
621 // get key and then get all 8 bytes of payload decoded
622 xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
623 for (size_t idx = 0; idx < 8; idx++) {
624 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
625 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
626 }
627 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
628 //
629 uint8_t fmtLen = ByteStream[0]>>2;
630 uint32_t FC = 0;
631 uint32_t Card = 0;
632 //get raw 96 bits to print
633 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
634 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
635 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
636
637 if (fmtLen==36){
638 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
639 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
640 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
641 } else if(fmtLen==26){
642 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
643 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
644 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
645 } else {
646 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
647 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
648 }
649 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
650 setDemodBuf(DemodBuffer+ans, 96, 0);
651 return 1;
652 }
653
654 //by marshmellow
655 //see ASKDemod for what args are accepted
656 int CmdVikingDemod(const char *Cmd)
657 {
658 if (!ASKDemod(Cmd, false, false, 1)) {
659 if (g_debugMode) PrintAndLog("ASKDemod failed");
660 return 0;
661 }
662 size_t size = DemodBufferLen;
663 //call lfdemod.c demod for Viking
664 int ans = VikingDemod_AM(DemodBuffer, &size);
665 if (ans < 0) {
666 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
667 return 0;
668 }
669 //got a good demod
670 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
671 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
672 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
673 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
674 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);
675 PrintAndLog("Raw: %08X%08X", raw1,raw2);
676 setDemodBuf(DemodBuffer+ans, 64, 0);
677 return 1;
678 }
679
680 //by marshmellow - see ASKDemod
681 int Cmdaskrawdemod(const char *Cmd)
682 {
683 char cmdp = param_getchar(Cmd, 0);
684 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
685 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
686 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
687 PrintAndLog(" <invert>, 1 to invert output");
688 PrintAndLog(" [set maximum allowed errors], default = 100");
689 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
690 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
691 PrintAndLog("");
692 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
693 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
694 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
695 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
696 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
697 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");
698 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");
699 return 0;
700 }
701 return ASKDemod(Cmd, TRUE, FALSE, 0);
702 }
703
704 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
705 {
706 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
707 size_t Correlation = 0;
708 int maxSum = 0;
709 int lastMax = 0;
710 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
711 for (int i = 0; i < GraphTraceLen - window; ++i) {
712 int sum = 0;
713 for (int j = 0; j < window; ++j) {
714 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
715 }
716 CorrelBuffer[i] = sum;
717 if (sum >= maxSum-100 && sum <= maxSum+100){
718 //another max
719 Correlation = i-lastMax;
720 lastMax = i;
721 if (sum > maxSum) maxSum = sum;
722 } else if (sum > maxSum){
723 maxSum=sum;
724 lastMax = i;
725 }
726 }
727 if (Correlation==0){
728 //try again with wider margin
729 for (int i = 0; i < GraphTraceLen - window; i++){
730 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
731 //another max
732 Correlation = i-lastMax;
733 lastMax = i;
734 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
735 }
736 }
737 }
738 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
739
740 if (SaveGrph){
741 GraphTraceLen = GraphTraceLen - window;
742 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
743 RepaintGraphWindow();
744 }
745 return Correlation;
746 }
747
748 int usage_data_autocorr(void)
749 {
750 //print help
751 PrintAndLog("Usage: data autocorr [window] [g]");
752 PrintAndLog("Options: ");
753 PrintAndLog(" h This help");
754 PrintAndLog(" [window] window length for correlation - default = 4000");
755 PrintAndLog(" g save back to GraphBuffer (overwrite)");
756 return 0;
757 }
758
759 int CmdAutoCorr(const char *Cmd)
760 {
761 char cmdp = param_getchar(Cmd, 0);
762 if (cmdp == 'h' || cmdp == 'H')
763 return usage_data_autocorr();
764 int window = 4000; //set default
765 char grph=0;
766 bool updateGrph = FALSE;
767 sscanf(Cmd, "%i %c", &window, &grph);
768
769 if (window >= GraphTraceLen) {
770 PrintAndLog("window must be smaller than trace (%d samples)",
771 GraphTraceLen);
772 return 0;
773 }
774 if (grph == 'g') updateGrph=TRUE;
775 return AutoCorrelate(window, updateGrph, TRUE);
776 }
777
778 int CmdBitsamples(const char *Cmd)
779 {
780 int cnt = 0;
781 uint8_t got[12288];
782
783 GetFromBigBuf(got,sizeof(got),0);
784 WaitForResponse(CMD_ACK,NULL);
785
786 for (int j = 0; j < sizeof(got); j++) {
787 for (int k = 0; k < 8; k++) {
788 if(got[j] & (1 << (7 - k))) {
789 GraphBuffer[cnt++] = 1;
790 } else {
791 GraphBuffer[cnt++] = 0;
792 }
793 }
794 }
795 GraphTraceLen = cnt;
796 RepaintGraphWindow();
797 return 0;
798 }
799
800 int CmdBuffClear(const char *Cmd)
801 {
802 UsbCommand c = {CMD_BUFF_CLEAR};
803 SendCommand(&c);
804 ClearGraph(true);
805 return 0;
806 }
807
808 int CmdDec(const char *Cmd)
809 {
810 for (int i = 0; i < (GraphTraceLen / 2); ++i)
811 GraphBuffer[i] = GraphBuffer[i * 2];
812 GraphTraceLen /= 2;
813 PrintAndLog("decimated by 2");
814 RepaintGraphWindow();
815 return 0;
816 }
817 /**
818 * Undecimate - I'd call it 'interpolate', but we'll save that
819 * name until someone does an actual interpolation command, not just
820 * blindly repeating samples
821 * @param Cmd
822 * @return
823 */
824 int CmdUndec(const char *Cmd)
825 {
826 if(param_getchar(Cmd, 0) == 'h')
827 {
828 PrintAndLog("Usage: data undec [factor]");
829 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
830 PrintAndLog("Options: ");
831 PrintAndLog(" h This help");
832 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
833 PrintAndLog("Example: 'data undec 3'");
834 return 0;
835 }
836
837 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
838 //We have memory, don't we?
839 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
840 uint32_t g_index = 0, s_index = 0;
841 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
842 {
843 int count = 0;
844 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
845 swap[s_index+count] = GraphBuffer[g_index];
846
847 s_index += count;
848 g_index++;
849 }
850
851 memcpy(GraphBuffer, swap, s_index * sizeof(int));
852 GraphTraceLen = s_index;
853 RepaintGraphWindow();
854 return 0;
855 }
856
857 //by marshmellow
858 //shift graph zero up or down based on input + or -
859 int CmdGraphShiftZero(const char *Cmd)
860 {
861
862 int shift=0;
863 //set options from parameters entered with the command
864 sscanf(Cmd, "%i", &shift);
865 int shiftedVal=0;
866 for(int i = 0; i<GraphTraceLen; i++){
867 shiftedVal=GraphBuffer[i]+shift;
868 if (shiftedVal>127)
869 shiftedVal=127;
870 else if (shiftedVal<-127)
871 shiftedVal=-127;
872 GraphBuffer[i]= shiftedVal;
873 }
874 CmdNorm("");
875 return 0;
876 }
877
878 //by marshmellow
879 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
880 //similar to dirtheshold, threshold commands
881 //takes a threshold length which is the measured length between two samples then determines an edge
882 int CmdAskEdgeDetect(const char *Cmd)
883 {
884 int thresLen = 25;
885 int Last = 0;
886 sscanf(Cmd, "%i", &thresLen);
887
888 for(int i = 1; i<GraphTraceLen; i++){
889 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
890 Last = 127;
891 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
892 Last = -127;
893 GraphBuffer[i-1] = Last;
894 }
895 RepaintGraphWindow();
896 return 0;
897 }
898
899 /* Print our clock rate */
900 // uses data from graphbuffer
901 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
902 int CmdDetectClockRate(const char *Cmd)
903 {
904 char cmdp = param_getchar(Cmd, 0);
905 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
906 PrintAndLog("Usage: data detectclock [modulation] <clock>");
907 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
908 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
909 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
910 PrintAndLog("");
911 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
912 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
913 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
914 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
915 }
916 int ans=0;
917 if (cmdp == 'a'){
918 ans = GetAskClock(Cmd+1, true, false);
919 } else if (cmdp == 'f'){
920 ans = GetFskClock("", true, false);
921 } else if (cmdp == 'n'){
922 ans = GetNrzClock("", true, false);
923 } else if (cmdp == 'p'){
924 ans = GetPskClock("", true, false);
925 } else {
926 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
927 }
928 return ans;
929 }
930
931 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
932 {
933 static char fType[8];
934 memset(fType, 0x00, 8);
935 char *fskType = fType;
936 if (fchigh==10 && fclow==8){
937 if (invert) //fsk2a
938 memcpy(fskType, "FSK2a", 5);
939 else //fsk2
940 memcpy(fskType, "FSK2", 4);
941 } else if (fchigh == 8 && fclow == 5) {
942 if (invert)
943 memcpy(fskType, "FSK1", 4);
944 else
945 memcpy(fskType, "FSK1a", 5);
946 } else {
947 memcpy(fskType, "FSK??", 5);
948 }
949 return fskType;
950 }
951
952 //by marshmellow
953 //fsk raw demod and print binary
954 //takes 4 arguments - Clock, invert, fchigh, fclow
955 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
956 int FSKrawDemod(const char *Cmd, bool verbose)
957 {
958 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
959 uint8_t rfLen, invert, fchigh, fclow;
960 //set defaults
961 //set options from parameters entered with the command
962 rfLen = param_get8(Cmd, 0);
963 invert = param_get8(Cmd, 1);
964 fchigh = param_get8(Cmd, 2);
965 fclow = param_get8(Cmd, 3);
966
967 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
968 if (rfLen==1) {
969 invert = 1; //if invert option only is used
970 rfLen = 0;
971 }
972 }
973 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
974 size_t BitLen = getFromGraphBuf(BitStream);
975 if (BitLen==0) return 0;
976 //get field clock lengths
977 uint16_t fcs=0;
978 if (!fchigh || !fclow) {
979 fcs = countFC(BitStream, BitLen, 1);
980 if (!fcs) {
981 fchigh = 10;
982 fclow = 8;
983 } else {
984 fchigh = (fcs >> 8) & 0x00FF;
985 fclow = fcs & 0x00FF;
986 }
987 }
988 //get bit clock length
989 if (!rfLen) {
990 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
991 if (!rfLen) rfLen = 50;
992 }
993 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
994 if (size > 0) {
995 setDemodBuf(BitStream,size,0);
996
997 // Now output the bitstream to the scrollback by line of 16 bits
998 if (verbose || g_debugMode) {
999 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
1000 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
1001 printDemodBuff();
1002 }
1003
1004 return 1;
1005 } else {
1006 if (g_debugMode) PrintAndLog("no FSK data found");
1007 }
1008 return 0;
1009 }
1010
1011 //by marshmellow
1012 //fsk raw demod and print binary
1013 //takes 4 arguments - Clock, invert, fchigh, fclow
1014 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
1015 int CmdFSKrawdemod(const char *Cmd)
1016 {
1017 char cmdp = param_getchar(Cmd, 0);
1018 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
1019 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
1020 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
1021 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
1022 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
1023 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
1024 PrintAndLog("");
1025 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
1026 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
1027 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
1028 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
1029 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
1030 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
1031 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
1032 return 0;
1033 }
1034 return FSKrawDemod(Cmd, TRUE);
1035 }
1036
1037 //by marshmellow (based on existing demod + holiman's refactor)
1038 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
1039 //print full HID Prox ID and some bit format details if found
1040 int CmdFSKdemodHID(const char *Cmd)
1041 {
1042 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1043 uint32_t hi2=0, hi=0, lo=0;
1044
1045 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1046 size_t BitLen = getFromGraphBuf(BitStream);
1047 if (BitLen==0) return 0;
1048 //get binary from fsk wave
1049 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1050 if (idx<0){
1051 if (g_debugMode){
1052 if (idx==-1){
1053 PrintAndLog("DEBUG: Just Noise Detected");
1054 } else if (idx == -2) {
1055 PrintAndLog("DEBUG: Error demoding fsk");
1056 } else if (idx == -3) {
1057 PrintAndLog("DEBUG: Preamble not found");
1058 } else if (idx == -4) {
1059 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
1060 } else {
1061 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1062 }
1063 }
1064 return 0;
1065 }
1066 if (hi2==0 && hi==0 && lo==0) {
1067 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
1068 return 0;
1069 }
1070 if (hi2 != 0){ //extra large HID tags
1071 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
1072 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
1073 }
1074 else { //standard HID tags <38 bits
1075 uint8_t fmtLen = 0;
1076 uint32_t fc = 0;
1077 uint32_t cardnum = 0;
1078 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
1079 uint32_t lo2=0;
1080 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
1081 uint8_t idx3 = 1;
1082 while(lo2>1){ //find last bit set to 1 (format len bit)
1083 lo2=lo2>>1;
1084 idx3++;
1085 }
1086 fmtLen =idx3+19;
1087 fc =0;
1088 cardnum=0;
1089 if(fmtLen==26){
1090 cardnum = (lo>>1)&0xFFFF;
1091 fc = (lo>>17)&0xFF;
1092 }
1093 if(fmtLen==34){
1094 cardnum = (lo>>1)&0xFFFF;
1095 fc= ((hi&1)<<15)|(lo>>17);
1096 }
1097 if(fmtLen==35){
1098 cardnum = (lo>>1)&0xFFFFF;
1099 fc = ((hi&1)<<11)|(lo>>21);
1100 }
1101 }
1102 else { //if bit 38 is not set then 37 bit format is used
1103 fmtLen = 37;
1104 fc = 0;
1105 cardnum = 0;
1106 if(fmtLen == 37){
1107 cardnum = (lo>>1)&0x7FFFF;
1108 fc = ((hi&0xF)<<12)|(lo>>20);
1109 }
1110 }
1111 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
1112 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
1113 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
1114 }
1115 setDemodBuf(BitStream,BitLen,idx);
1116 if (g_debugMode){
1117 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
1118 printDemodBuff();
1119 }
1120 return 1;
1121 }
1122
1123 //by marshmellow
1124 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
1125 //print full Paradox Prox ID and some bit format details if found
1126 int CmdFSKdemodParadox(const char *Cmd)
1127 {
1128 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1129 uint32_t hi2=0, hi=0, lo=0;
1130
1131 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1132 size_t BitLen = getFromGraphBuf(BitStream);
1133 if (BitLen==0) return 0;
1134 //get binary from fsk wave
1135 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1136 if (idx<0){
1137 if (g_debugMode){
1138 if (idx==-1){
1139 PrintAndLog("DEBUG: Just Noise Detected");
1140 } else if (idx == -2) {
1141 PrintAndLog("DEBUG: Error demoding fsk");
1142 } else if (idx == -3) {
1143 PrintAndLog("DEBUG: Preamble not found");
1144 } else if (idx == -4) {
1145 PrintAndLog("DEBUG: Error in Manchester data");
1146 } else {
1147 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1148 }
1149 }
1150 return 0;
1151 }
1152 if (hi2==0 && hi==0 && lo==0){
1153 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1154 return 0;
1155 }
1156 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1157 uint32_t cardnum = (lo>>10)&0xFFFF;
1158 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1159 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1160 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1161
1162 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1163 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
1164 setDemodBuf(BitStream,BitLen,idx);
1165 if (g_debugMode){
1166 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1167 printDemodBuff();
1168 }
1169 return 1;
1170 }
1171
1172 //by marshmellow
1173 //IO-Prox demod - FSK RF/64 with preamble of 000000001
1174 //print ioprox ID and some format details
1175 int CmdFSKdemodIO(const char *Cmd)
1176 {
1177 int idx=0;
1178 //something in graphbuffer?
1179 if (GraphTraceLen < 65) {
1180 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1181 return 0;
1182 }
1183 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1184 size_t BitLen = getFromGraphBuf(BitStream);
1185 if (BitLen==0) return 0;
1186
1187 //get binary from fsk wave
1188 idx = IOdemodFSK(BitStream,BitLen);
1189 if (idx<0){
1190 if (g_debugMode){
1191 if (idx==-1){
1192 PrintAndLog("DEBUG: Just Noise Detected");
1193 } else if (idx == -2) {
1194 PrintAndLog("DEBUG: not enough samples");
1195 } else if (idx == -3) {
1196 PrintAndLog("DEBUG: error during fskdemod");
1197 } else if (idx == -4) {
1198 PrintAndLog("DEBUG: Preamble not found");
1199 } else if (idx == -5) {
1200 PrintAndLog("DEBUG: Separator bits not found");
1201 } else {
1202 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1203 }
1204 }
1205 return 0;
1206 }
1207 if (idx==0){
1208 if (g_debugMode){
1209 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1210 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
1211 }
1212 return 0;
1213 }
1214 //Index map
1215 //0 10 20 30 40 50 60
1216 //| | | | | | |
1217 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1218 //-----------------------------------------------------------------------------
1219 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1220 //
1221 //XSF(version)facility:codeone+codetwo (raw)
1222 //Handle the data
1223 if (idx+64>BitLen) {
1224 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1225 return 0;
1226 }
1227 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]);
1228 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]);
1229 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]);
1230 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]);
1231 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]);
1232 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]);
1233 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]);
1234
1235 uint32_t code = bytebits_to_byte(BitStream+idx,32);
1236 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
1237 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1238 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
1239 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
1240 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
1241 uint16_t calccrc = 0;
1242
1243 for (uint8_t i=1; i<6; ++i){
1244 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
1245 }
1246 calccrc &= 0xff;
1247 calccrc = 0xff - calccrc;
1248
1249 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
1250
1251 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
1252 setDemodBuf(BitStream,64,idx);
1253 if (g_debugMode){
1254 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1255 printDemodBuff();
1256 }
1257 return 1;
1258 }
1259
1260 //by marshmellow
1261 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1262 //print full AWID Prox ID and some bit format details if found
1263 int CmdFSKdemodAWID(const char *Cmd)
1264 {
1265 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1266 size_t size = getFromGraphBuf(BitStream);
1267 if (size==0) return 0;
1268
1269 //get binary from fsk wave
1270 int idx = AWIDdemodFSK(BitStream, &size);
1271 if (idx<=0){
1272 if (g_debugMode){
1273 if (idx == -1)
1274 PrintAndLog("DEBUG: Error - not enough samples");
1275 else if (idx == -2)
1276 PrintAndLog("DEBUG: Error - only noise found");
1277 else if (idx == -3)
1278 PrintAndLog("DEBUG: Error - problem during FSK demod");
1279 else if (idx == -4)
1280 PrintAndLog("DEBUG: Error - AWID preamble not found");
1281 else if (idx == -5)
1282 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1283 else
1284 PrintAndLog("DEBUG: Error %d",idx);
1285 }
1286 return 0;
1287 }
1288
1289 // Index map
1290 // 0 10 20 30 40 50 60
1291 // | | | | | | |
1292 // 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
1293 // -----------------------------------------------------------------------------
1294 // 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
1295 // 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
1296 // |---26 bit---| |-----117----||-------------142-------------|
1297 // b = format bit len, o = odd parity of last 3 bits
1298 // f = facility code, c = card number
1299 // w = wiegand parity
1300 // (26 bit format shown)
1301
1302 //get raw ID before removing parities
1303 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1304 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1305 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1306 setDemodBuf(BitStream,96,idx);
1307
1308 size = removeParity(BitStream, idx+8, 4, 1, 88);
1309 if (size != 66){
1310 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1311 return 0;
1312 }
1313 // ok valid card found!
1314
1315 // Index map
1316 // 0 10 20 30 40 50 60
1317 // | | | | | | |
1318 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1319 // -----------------------------------------------------------------------------
1320 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1321 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1322 // |26 bit| |-117--| |-----142------|
1323 // b = format bit len, o = odd parity of last 3 bits
1324 // f = facility code, c = card number
1325 // w = wiegand parity
1326 // (26 bit format shown)
1327
1328 uint32_t fc = 0;
1329 uint32_t cardnum = 0;
1330 uint32_t code1 = 0;
1331 uint32_t code2 = 0;
1332 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
1333 if (fmtLen==26){
1334 fc = bytebits_to_byte(BitStream+9, 8);
1335 cardnum = bytebits_to_byte(BitStream+17, 16);
1336 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1337 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1338 } else {
1339 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1340 if (fmtLen>32){
1341 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1342 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
1343 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1344 } else{
1345 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1346 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1347 }
1348 }
1349 if (g_debugMode){
1350 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1351 printDemodBuff();
1352 }
1353 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
1354 return 1;
1355 }
1356
1357 //by marshmellow
1358 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1359 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1360 int CmdFSKdemodPyramid(const char *Cmd)
1361 {
1362 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1363 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1364 size_t size = getFromGraphBuf(BitStream);
1365 if (size==0) return 0;
1366
1367 //get binary from fsk wave
1368 int idx = PyramiddemodFSK(BitStream, &size);
1369 if (idx < 0){
1370 if (g_debugMode){
1371 if (idx == -5)
1372 PrintAndLog("DEBUG: Error - not enough samples");
1373 else if (idx == -1)
1374 PrintAndLog("DEBUG: Error - only noise found");
1375 else if (idx == -2)
1376 PrintAndLog("DEBUG: Error - problem during FSK demod");
1377 else if (idx == -3)
1378 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1379 else if (idx == -4)
1380 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1381 else
1382 PrintAndLog("DEBUG: Error - idx: %d",idx);
1383 }
1384 return 0;
1385 }
1386 // Index map
1387 // 0 10 20 30 40 50 60
1388 // | | | | | | |
1389 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1390 // -----------------------------------------------------------------------------
1391 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1392 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1393
1394 // 64 70 80 90 100 110 120
1395 // | | | | | | |
1396 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1397 // -----------------------------------------------------------------------------
1398 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1399 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1400 // |---115---||---------71---------|
1401 // s = format start bit, o = odd parity of last 7 bits
1402 // f = facility code, c = card number
1403 // w = wiegand parity, x = extra space for other formats
1404 // p = unknown checksum
1405 // (26 bit format shown)
1406
1407 //get bytes for checksum calc
1408 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
1409 uint8_t csBuff[14] = {0x00};
1410 for (uint8_t i = 0; i < 13; i++){
1411 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
1412 }
1413 //check checksum calc
1414 //checksum calc thanks to ICEMAN!!
1415 uint32_t checkCS = CRC8Maxim(csBuff,13);
1416
1417 //get raw ID before removing parities
1418 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1419 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1420 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1421 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
1422 setDemodBuf(BitStream,128,idx);
1423
1424 size = removeParity(BitStream, idx+8, 8, 1, 120);
1425 if (size != 105){
1426 if (g_debugMode)
1427 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1428 return 0;
1429 }
1430
1431 // ok valid card found!
1432
1433 // Index map
1434 // 0 10 20 30 40 50 60 70
1435 // | | | | | | | |
1436 // 01234567890123456789012345678901234567890123456789012345678901234567890
1437 // -----------------------------------------------------------------------
1438 // 00000000000000000000000000000000000000000000000000000000000000000000000
1439 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1440
1441 // 71 80 90 100
1442 // | | | |
1443 // 1 2 34567890 1234567890123456 7 8901234
1444 // ---------------------------------------
1445 // 1 1 01110011 0000000001000110 0 1001010
1446 // s w ffffffff cccccccccccccccc w ppppppp
1447 // |--115-| |------71------|
1448 // s = format start bit, o = odd parity of last 7 bits
1449 // f = facility code, c = card number
1450 // w = wiegand parity, x = extra space for other formats
1451 // p = unknown checksum
1452 // (26 bit format shown)
1453
1454 //find start bit to get fmtLen
1455 int j;
1456 for (j=0; j<size; j++){
1457 if(BitStream[j]) break;
1458 }
1459 uint8_t fmtLen = size-j-8;
1460 uint32_t fc = 0;
1461 uint32_t cardnum = 0;
1462 uint32_t code1 = 0;
1463 if (fmtLen==26){
1464 fc = bytebits_to_byte(BitStream+73, 8);
1465 cardnum = bytebits_to_byte(BitStream+81, 16);
1466 code1 = bytebits_to_byte(BitStream+72,fmtLen);
1467 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);
1468 } else if (fmtLen==45){
1469 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
1470 fc = bytebits_to_byte(BitStream+53, 10);
1471 cardnum = bytebits_to_byte(BitStream+63, 32);
1472 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1473 } else {
1474 cardnum = bytebits_to_byte(BitStream+81, 16);
1475 if (fmtLen>32){
1476 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
1477 //code2 = bytebits_to_byte(BitStream+(size-32),32);
1478 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1479 } else{
1480 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
1481 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1482 }
1483 }
1484 if (checksum == checkCS)
1485 PrintAndLog("Checksum %02x passed", checksum);
1486 else
1487 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
1488
1489 if (g_debugMode){
1490 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1491 printDemodBuff();
1492 }
1493 return 1;
1494 }
1495
1496 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
1497 // 8 databits + 1 parity (1)
1498 // CIITT 16 chksum
1499 // NATIONAL CODE, ICAR database
1500 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
1501 // FLAG (animal/non-animal)
1502 /*
1503 38 IDbits
1504 10 country code
1505 1 extra app bit
1506 14 reserved bits
1507 1 animal bit
1508 16 ccitt CRC chksum over 64bit ID CODE.
1509 24 appli bits.
1510
1511 -- sample: 985121004515220 [ 37FF65B88EF94 ]
1512 */
1513 int CmdFDXBdemodBI(const char *Cmd){
1514
1515 int invert = 1;
1516 int clk = 32;
1517 int errCnt = 0;
1518 int maxErr = 0;
1519 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
1520 size_t size = getFromGraphBuf(BitStream);
1521
1522 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
1523 if ( errCnt < 0 || errCnt > maxErr ) {
1524 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
1525 return 0;
1526 }
1527
1528 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
1529 if (errCnt < 0 || errCnt > maxErr ) {
1530 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
1531 return 0;
1532 }
1533
1534 int preambleIndex = FDXBdemodBI(BitStream, &size);
1535 if (preambleIndex < 0){
1536 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
1537 return 0;
1538 }
1539 if (size != 128) {
1540 if (g_debugMode) PrintAndLog("Error incorrect data length found");
1541 return 0;
1542 }
1543
1544 setDemodBuf(BitStream, 128, preambleIndex);
1545
1546 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
1547 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
1548 if ( size != 104 ) {
1549 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1550 return 0;
1551 }
1552 if (g_debugMode) {
1553 char *bin = sprint_bin_break(BitStream,size,16);
1554 PrintAndLog("DEBUG BinStream:\n%s",bin);
1555 }
1556 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1557 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1558
1559 //got a good demod
1560 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1561 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1562 uint8_t dataBlockBit = BitStream[48];
1563 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1564 uint8_t animalBit = BitStream[63];
1565 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1566 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1567
1568 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1569 uint8_t raw[8];
1570 num_to_bytes(rawid, 8, raw);
1571
1572 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1573
1574 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1575 PrintAndLog("Animal ID: %04u-%012llu", countryCode, NationalCode);
1576 PrintAndLog("National Code: %012llu", NationalCode);
1577 PrintAndLog("CountryCode: %04u", countryCode);
1578 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1579 PrintAndLog("reserved Code: %u", reservedCode);
1580 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1581 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1582 PrintAndLog("Extended: 0x%X\n", extended);
1583
1584 return 1;
1585 }
1586
1587
1588 //by marshmellow
1589 //attempt to psk1 demod graph buffer
1590 int PSKDemod(const char *Cmd, bool verbose)
1591 {
1592 int invert=0;
1593 int clk=0;
1594 int maxErr=100;
1595 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1596 if (clk==1){
1597 invert=1;
1598 clk=0;
1599 }
1600 if (invert != 0 && invert != 1) {
1601 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1602 return 0;
1603 }
1604 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1605 size_t BitLen = getFromGraphBuf(BitStream);
1606 if (BitLen==0) return 0;
1607 uint8_t carrier=countFC(BitStream, BitLen, 0);
1608 if (carrier!=2 && carrier!=4 && carrier!=8){
1609 //invalid carrier
1610 return 0;
1611 }
1612 if (g_debugMode){
1613 PrintAndLog("Carrier: rf/%d",carrier);
1614 }
1615 int errCnt=0;
1616 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1617 if (errCnt > maxErr){
1618 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1619 return 0;
1620 }
1621 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1622 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1623 return 0;
1624 }
1625 if (verbose || g_debugMode){
1626 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1627 if (errCnt>0){
1628 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1629 }
1630 }
1631 //prime demod buffer for output
1632 setDemodBuf(BitStream,BitLen,0);
1633 return 1;
1634 }
1635
1636 // Indala 26 bit decode
1637 // by marshmellow
1638 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1639 int CmdIndalaDecode(const char *Cmd)
1640 {
1641 int ans;
1642 if (strlen(Cmd)>0){
1643 ans = PSKDemod(Cmd, 0);
1644 } else{ //default to RF/32
1645 ans = PSKDemod("32", 0);
1646 }
1647
1648 if (!ans){
1649 if (g_debugMode)
1650 PrintAndLog("Error1: %d",ans);
1651 return 0;
1652 }
1653 uint8_t invert=0;
1654 size_t size = DemodBufferLen;
1655 int startIdx = indala26decode(DemodBuffer, &size, &invert);
1656 if (startIdx < 0 || size > 224) {
1657 if (g_debugMode)
1658 PrintAndLog("Error2: %d",ans);
1659 return -1;
1660 }
1661 setDemodBuf(DemodBuffer, size, (size_t)startIdx);
1662 if (invert)
1663 if (g_debugMode)
1664 PrintAndLog("Had to invert bits");
1665
1666 PrintAndLog("BitLen: %d",DemodBufferLen);
1667 //convert UID to HEX
1668 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1669 uid1=bytebits_to_byte(DemodBuffer,32);
1670 uid2=bytebits_to_byte(DemodBuffer+32,32);
1671 if (DemodBufferLen==64) {
1672 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1673 } else {
1674 uid3=bytebits_to_byte(DemodBuffer+64,32);
1675 uid4=bytebits_to_byte(DemodBuffer+96,32);
1676 uid5=bytebits_to_byte(DemodBuffer+128,32);
1677 uid6=bytebits_to_byte(DemodBuffer+160,32);
1678 uid7=bytebits_to_byte(DemodBuffer+192,32);
1679 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1680 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1681 }
1682 if (g_debugMode){
1683 PrintAndLog("DEBUG: printing demodbuffer:");
1684 printDemodBuff();
1685 }
1686 return 1;
1687 }
1688
1689 int CmdPSKNexWatch(const char *Cmd)
1690 {
1691 if (!PSKDemod("", false)) return 0;
1692 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};
1693 size_t startIdx = 0, size = DemodBufferLen;
1694 bool invert = false;
1695 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1696 // if didn't find preamble try again inverting
1697 if (!PSKDemod("1", false)) return 0;
1698 size = DemodBufferLen;
1699 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1700 invert = true;
1701 }
1702 if (size != 128) return 0;
1703 setDemodBuf(DemodBuffer, size, startIdx+4);
1704 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1705 //get ID
1706 uint32_t ID = 0;
1707 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1708 for (uint8_t idx=0; idx<8; idx++){
1709 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1710 }
1711 }
1712 //parity check (TBD)
1713
1714 //checksum check (TBD)
1715
1716 //output
1717 PrintAndLog("NexWatch ID: %d", ID);
1718 if (invert){
1719 PrintAndLog("Had to Invert - probably NexKey");
1720 for (uint8_t idx=0; idx<size; idx++)
1721 DemodBuffer[idx] ^= 1;
1722 }
1723
1724 CmdPrintDemodBuff("x");
1725 return 1;
1726 }
1727
1728 // by marshmellow
1729 // takes 3 arguments - clock, invert, maxErr as integers
1730 // attempts to demodulate nrz only
1731 // prints binary found and saves in demodbuffer for further commands
1732 int NRZrawDemod(const char *Cmd, bool verbose)
1733 {
1734 int invert=0;
1735 int clk=0;
1736 int maxErr=100;
1737 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1738 if (clk==1){
1739 invert=1;
1740 clk=0;
1741 }
1742 if (invert != 0 && invert != 1) {
1743 PrintAndLog("Invalid argument: %s", Cmd);
1744 return 0;
1745 }
1746 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1747 size_t BitLen = getFromGraphBuf(BitStream);
1748 if (BitLen==0) return 0;
1749 int errCnt=0;
1750 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
1751 if (errCnt > maxErr){
1752 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1753 return 0;
1754 }
1755 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1756 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1757 return 0;
1758 }
1759 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1760 //prime demod buffer for output
1761 setDemodBuf(BitStream,BitLen,0);
1762
1763 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1764 if (verbose || g_debugMode) {
1765 PrintAndLog("NRZ demoded bitstream:");
1766 // Now output the bitstream to the scrollback by line of 16 bits
1767 printDemodBuff();
1768 }
1769 return 1;
1770 }
1771
1772 int CmdNRZrawDemod(const char *Cmd)
1773 {
1774 char cmdp = param_getchar(Cmd, 0);
1775 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1776 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1777 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1778 PrintAndLog(" <invert>, 1 for invert output");
1779 PrintAndLog(" [set maximum allowed errors], default = 100.");
1780 PrintAndLog("");
1781 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1782 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1783 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1784 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1785 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");
1786 return 0;
1787 }
1788 return NRZrawDemod(Cmd, TRUE);
1789 }
1790
1791 // by marshmellow
1792 // takes 3 arguments - clock, invert, maxErr as integers
1793 // attempts to demodulate psk only
1794 // prints binary found and saves in demodbuffer for further commands
1795 int CmdPSK1rawDemod(const char *Cmd)
1796 {
1797 int ans;
1798 char cmdp = param_getchar(Cmd, 0);
1799 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1800 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1801 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1802 PrintAndLog(" <invert>, 1 for invert output");
1803 PrintAndLog(" [set maximum allowed errors], default = 100.");
1804 PrintAndLog("");
1805 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1806 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1807 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1808 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1809 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");
1810 return 0;
1811 }
1812 ans = PSKDemod(Cmd, TRUE);
1813 //output
1814 if (!ans){
1815 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1816 return 0;
1817 }
1818
1819 PrintAndLog("PSK1 demoded bitstream:");
1820 // Now output the bitstream to the scrollback by line of 16 bits
1821 printDemodBuff();
1822 return 1;
1823 }
1824
1825 // by marshmellow
1826 // takes same args as cmdpsk1rawdemod
1827 int CmdPSK2rawDemod(const char *Cmd)
1828 {
1829 int ans=0;
1830 char cmdp = param_getchar(Cmd, 0);
1831 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1832 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1833 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1834 PrintAndLog(" <invert>, 1 for invert output");
1835 PrintAndLog(" [set maximum allowed errors], default = 100.");
1836 PrintAndLog("");
1837 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1838 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1839 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1840 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1841 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");
1842 return 0;
1843 }
1844 ans=PSKDemod(Cmd, TRUE);
1845 if (!ans){
1846 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1847 return 0;
1848 }
1849 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1850 PrintAndLog("PSK2 demoded bitstream:");
1851 // Now output the bitstream to the scrollback by line of 16 bits
1852 printDemodBuff();
1853 return 1;
1854 }
1855
1856 // by marshmellow - combines all raw demod functions into one menu command
1857 int CmdRawDemod(const char *Cmd)
1858 {
1859 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1860
1861 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1862 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1863 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1864 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1865 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1866 PrintAndLog(" <options> see specific modulation help for optional parameters");
1867 PrintAndLog("");
1868 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1869 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1870 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1871 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1872 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1873 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1874 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1875 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1876 return 0;
1877 }
1878 char cmdp2 = Cmd[1];
1879 int ans = 0;
1880 if (cmdp == 'f' && cmdp2 == 's'){
1881 ans = CmdFSKrawdemod(Cmd+2);
1882 } else if(cmdp == 'a' && cmdp2 == 'b'){
1883 ans = Cmdaskbiphdemod(Cmd+2);
1884 } else if(cmdp == 'a' && cmdp2 == 'm'){
1885 ans = Cmdaskmandemod(Cmd+2);
1886 } else if(cmdp == 'a' && cmdp2 == 'r'){
1887 ans = Cmdaskrawdemod(Cmd+2);
1888 } else if(cmdp == 'n' && cmdp2 == 'r'){
1889 ans = CmdNRZrawDemod(Cmd+2);
1890 } else if(cmdp == 'p' && cmdp2 == '1'){
1891 ans = CmdPSK1rawDemod(Cmd+2);
1892 } else if(cmdp == 'p' && cmdp2 == '2'){
1893 ans = CmdPSK2rawDemod(Cmd+2);
1894 } else {
1895 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1896 }
1897 return ans;
1898 }
1899
1900 int CmdGrid(const char *Cmd)
1901 {
1902 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1903 PlotGridXdefault= PlotGridX;
1904 PlotGridYdefault= PlotGridY;
1905 RepaintGraphWindow();
1906 return 0;
1907 }
1908
1909 int CmdHexsamples(const char *Cmd)
1910 {
1911 int i, j;
1912 int requested = 0;
1913 int offset = 0;
1914 char string_buf[25];
1915 char* string_ptr = string_buf;
1916 uint8_t got[BIGBUF_SIZE];
1917
1918 sscanf(Cmd, "%i %i", &requested, &offset);
1919
1920 /* if no args send something */
1921 if (requested == 0) {
1922 requested = 8;
1923 }
1924 if (offset + requested > sizeof(got)) {
1925 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1926 return 0;
1927 }
1928
1929 GetFromBigBuf(got,requested,offset);
1930 WaitForResponse(CMD_ACK,NULL);
1931
1932 i = 0;
1933 for (j = 0; j < requested; j++) {
1934 i++;
1935 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1936 if (i == 8) {
1937 *(string_ptr - 1) = '\0'; // remove the trailing space
1938 PrintAndLog("%s", string_buf);
1939 string_buf[0] = '\0';
1940 string_ptr = string_buf;
1941 i = 0;
1942 }
1943 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1944 *(string_ptr - 1) = '\0';
1945 PrintAndLog("%s", string_buf);
1946 string_buf[0] = '\0';
1947 }
1948 }
1949 return 0;
1950 }
1951
1952 int CmdHide(const char *Cmd)
1953 {
1954 HideGraphWindow();
1955 return 0;
1956 }
1957
1958 //zero mean GraphBuffer
1959 int CmdHpf(const char *Cmd)
1960 {
1961 int i;
1962 int accum = 0;
1963
1964 for (i = 10; i < GraphTraceLen; ++i)
1965 accum += GraphBuffer[i];
1966 accum /= (GraphTraceLen - 10);
1967 for (i = 0; i < GraphTraceLen; ++i)
1968 GraphBuffer[i] -= accum;
1969
1970 RepaintGraphWindow();
1971 return 0;
1972 }
1973
1974 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1975 {
1976 int i;
1977 uint8_t val = 0;
1978 for(i =0 ; i < bits_per_sample; i++)
1979 {
1980 val |= (headBit(b) << (7-i));
1981 }
1982 return val;
1983 }
1984
1985 int getSamples(const char *Cmd, bool silent)
1986 {
1987 //If we get all but the last byte in bigbuf,
1988 // we don't have to worry about remaining trash
1989 // in the last byte in case the bits-per-sample
1990 // does not line up on byte boundaries
1991
1992 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1993
1994 int n = strtol(Cmd, NULL, 0);
1995
1996 if (n == 0 || n > sizeof(got))
1997 n = sizeof(got);
1998
1999 PrintAndLog("Reading %d bytes from device memory\n", n);
2000 GetFromBigBuf(got,n,0);
2001 PrintAndLog("Data fetched");
2002 UsbCommand response;
2003 WaitForResponse(CMD_ACK, &response);
2004 uint8_t bits_per_sample = 8;
2005
2006 //Old devices without this feature would send 0 at arg[0]
2007 if(response.arg[0] > 0)
2008 {
2009 sample_config *sc = (sample_config *) response.d.asBytes;
2010 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
2011 , sc->decimation);
2012 bits_per_sample = sc->bits_per_sample;
2013 }
2014 if(bits_per_sample < 8)
2015 {
2016 PrintAndLog("Unpacking...");
2017 BitstreamIn bout = { got, bits_per_sample * n, 0};
2018 int j =0;
2019 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
2020 uint8_t sample = getByte(bits_per_sample, &bout);
2021 GraphBuffer[j] = ((int) sample )- 128;
2022 }
2023 GraphTraceLen = j;
2024 PrintAndLog("Unpacked %d samples" , j );
2025 }else
2026 {
2027 for (int j = 0; j < n; j++) {
2028 GraphBuffer[j] = ((int)got[j]) - 128;
2029 }
2030 GraphTraceLen = n;
2031 }
2032
2033 RepaintGraphWindow();
2034 return 0;
2035 }
2036
2037 int CmdSamples(const char *Cmd)
2038 {
2039 return getSamples(Cmd, false);
2040 }
2041
2042 int CmdTuneSamples(const char *Cmd)
2043 {
2044 int timeout = 0, arg = FLAG_TUNE_ALL;
2045
2046 if(*Cmd == 'l') {
2047 arg = FLAG_TUNE_LF;
2048 } else if (*Cmd == 'h') {
2049 arg = FLAG_TUNE_HF;
2050 } else if (*Cmd != '\0') {
2051 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
2052 return 0;
2053 }
2054
2055 printf("\nMeasuring antenna characteristics, please wait...");
2056
2057 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
2058 SendCommand(&c);
2059
2060 UsbCommand resp;
2061 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
2062 timeout++;
2063 printf(".");
2064 if (timeout > 7) {
2065 PrintAndLog("\nNo response from Proxmark. Aborting...");
2066 return 1;
2067 }
2068 }
2069
2070 int peakv, peakf;
2071 int vLf125, vLf134, vHf;
2072 vLf125 = resp.arg[0] & 0xffff;
2073 vLf134 = resp.arg[0] >> 16;
2074 vHf = resp.arg[1] & 0xffff;;
2075 peakf = resp.arg[2] & 0xffff;
2076 peakv = resp.arg[2] >> 16;
2077 PrintAndLog("");
2078 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
2079 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
2080 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
2081 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
2082
2083 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
2084 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
2085 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2086 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2087
2088 if (peakv < LF_UNUSABLE_V)
2089 PrintAndLog("# Your LF antenna is unusable.");
2090 else if (peakv < LF_MARGINAL_V)
2091 PrintAndLog("# Your LF antenna is marginal.");
2092 if (vHf < HF_UNUSABLE_V)
2093 PrintAndLog("# Your HF antenna is unusable.");
2094 else if (vHf < HF_MARGINAL_V)
2095 PrintAndLog("# Your HF antenna is marginal.");
2096
2097 if (peakv >= LF_UNUSABLE_V) {
2098 for (int i = 0; i < 256; i++) {
2099 GraphBuffer[i] = resp.d.asBytes[i] - 128;
2100 }
2101 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
2102 PrintAndLog("\n");
2103 GraphTraceLen = 256;
2104 ShowGraphWindow();
2105 RepaintGraphWindow();
2106 }
2107
2108 return 0;
2109 }
2110
2111
2112 int CmdLoad(const char *Cmd)
2113 {
2114 char filename[FILE_PATH_SIZE] = {0x00};
2115 int len = 0;
2116
2117 len = strlen(Cmd);
2118 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2119 memcpy(filename, Cmd, len);
2120
2121 FILE *f = fopen(filename, "r");
2122 if (!f) {
2123 PrintAndLog("couldn't open '%s'", filename);
2124 return 0;
2125 }
2126
2127 GraphTraceLen = 0;
2128 char line[80];
2129 while (fgets(line, sizeof (line), f)) {
2130 GraphBuffer[GraphTraceLen] = atoi(line);
2131 GraphTraceLen++;
2132 }
2133 fclose(f);
2134 PrintAndLog("loaded %d samples", GraphTraceLen);
2135 RepaintGraphWindow();
2136 return 0;
2137 }
2138
2139 int CmdLtrim(const char *Cmd)
2140 {
2141 int ds = atoi(Cmd);
2142 if (GraphTraceLen<=0) return 0;
2143 for (int i = ds; i < GraphTraceLen; ++i)
2144 GraphBuffer[i-ds] = GraphBuffer[i];
2145 GraphTraceLen -= ds;
2146
2147 RepaintGraphWindow();
2148 return 0;
2149 }
2150
2151 // trim graph to input argument length
2152 int CmdRtrim(const char *Cmd)
2153 {
2154 int ds = atoi(Cmd);
2155
2156 GraphTraceLen = ds;
2157
2158 RepaintGraphWindow();
2159 return 0;
2160 }
2161
2162 int CmdNorm(const char *Cmd)
2163 {
2164 int i;
2165 int max = INT_MIN, min = INT_MAX;
2166
2167 for (i = 10; i < GraphTraceLen; ++i) {
2168 if (GraphBuffer[i] > max)
2169 max = GraphBuffer[i];
2170 if (GraphBuffer[i] < min)
2171 min = GraphBuffer[i];
2172 }
2173
2174 if (max != min) {
2175 for (i = 0; i < GraphTraceLen; ++i) {
2176 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
2177 (max - min);
2178 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
2179 }
2180 }
2181 RepaintGraphWindow();
2182 return 0;
2183 }
2184
2185 int CmdPlot(const char *Cmd)
2186 {
2187 ShowGraphWindow();
2188 return 0;
2189 }
2190
2191 int CmdSave(const char *Cmd)
2192 {
2193 char filename[FILE_PATH_SIZE] = {0x00};
2194 int len = 0;
2195
2196 len = strlen(Cmd);
2197 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2198 memcpy(filename, Cmd, len);
2199
2200
2201 FILE *f = fopen(filename, "w");
2202 if(!f) {
2203 PrintAndLog("couldn't open '%s'", filename);
2204 return 0;
2205 }
2206 int i;
2207 for (i = 0; i < GraphTraceLen; i++) {
2208 fprintf(f, "%d\n", GraphBuffer[i]);
2209 }
2210 fclose(f);
2211 PrintAndLog("saved to '%s'", Cmd);
2212 return 0;
2213 }
2214
2215 int CmdScale(const char *Cmd)
2216 {
2217 CursorScaleFactor = atoi(Cmd);
2218 if (CursorScaleFactor == 0) {
2219 PrintAndLog("bad, can't have zero scale");
2220 CursorScaleFactor = 1;
2221 }
2222 RepaintGraphWindow();
2223 return 0;
2224 }
2225
2226 int CmdDirectionalThreshold(const char *Cmd)
2227 {
2228 int8_t upThres = param_get8(Cmd, 0);
2229 int8_t downThres = param_get8(Cmd, 1);
2230
2231 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
2232
2233 int lastValue = GraphBuffer[0];
2234 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
2235
2236 for (int i = 1; i < GraphTraceLen; ++i) {
2237 // Apply first threshold to samples heading up
2238 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2239 {
2240 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2241 GraphBuffer[i] = 1;
2242 }
2243 // Apply second threshold to samples heading down
2244 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2245 {
2246 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2247 GraphBuffer[i] = -1;
2248 }
2249 else
2250 {
2251 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2252 GraphBuffer[i] = GraphBuffer[i-1];
2253
2254 }
2255 }
2256 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2257 RepaintGraphWindow();
2258 return 0;
2259 }
2260
2261 int CmdZerocrossings(const char *Cmd)
2262 {
2263 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2264 CmdHpf("");
2265
2266 int sign = 1;
2267 int zc = 0;
2268 int lastZc = 0;
2269
2270 for (int i = 0; i < GraphTraceLen; ++i) {
2271 if (GraphBuffer[i] * sign >= 0) {
2272 // No change in sign, reproduce the previous sample count.
2273 zc++;
2274 GraphBuffer[i] = lastZc;
2275 } else {
2276 // Change in sign, reset the sample count.
2277 sign = -sign;
2278 GraphBuffer[i] = lastZc;
2279 if (sign > 0) {
2280 lastZc = zc;
2281 zc = 0;
2282 }
2283 }
2284 }
2285
2286 RepaintGraphWindow();
2287 return 0;
2288 }
2289
2290 int usage_data_bin2hex(){
2291 PrintAndLog("Usage: data bin2hex <binary_digits>");
2292 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
2293 return 0;
2294 }
2295
2296 /**
2297 * @brief Utility for conversion via cmdline.
2298 * @param Cmd
2299 * @return
2300 */
2301 int Cmdbin2hex(const char *Cmd)
2302 {
2303 int bg =0, en =0;
2304 if(param_getptr(Cmd, &bg, &en, 0))
2305 {
2306 return usage_data_bin2hex();
2307 }
2308 //Number of digits supplied as argument
2309 size_t length = en - bg +1;
2310 size_t bytelen = (length+7) / 8;
2311 uint8_t* arr = (uint8_t *) malloc(bytelen);
2312 memset(arr, 0, bytelen);
2313 BitstreamOut bout = { arr, 0, 0 };
2314
2315 for(; bg <= en ;bg++)
2316 {
2317 char c = Cmd[bg];
2318 if( c == '1') pushBit(&bout, 1);
2319 else if( c == '0') pushBit(&bout, 0);
2320 else PrintAndLog("Ignoring '%c'", c);
2321 }
2322
2323 if(bout.numbits % 8 != 0)
2324 {
2325 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
2326 }
2327
2328 //Uses printf instead of PrintAndLog since the latter
2329 // adds linebreaks to each printout - this way was more convenient since we don't have to
2330 // allocate a string and write to that first...
2331 for(size_t x = 0; x < bytelen ; x++)
2332 {
2333 printf("%02X", arr[x]);
2334 }
2335 printf("\n");
2336 free(arr);
2337 return 0;
2338 }
2339
2340 int usage_data_hex2bin() {
2341 PrintAndLog("Usage: data hex2bin <hex_digits>");
2342 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
2343 return 0;
2344
2345 }
2346
2347 int Cmdhex2bin(const char *Cmd)
2348 {
2349 int bg =0, en =0;
2350 if(param_getptr(Cmd, &bg, &en, 0))
2351 {
2352 return usage_data_hex2bin();
2353 }
2354
2355
2356 while(bg <= en )
2357 {
2358 char x = Cmd[bg++];
2359 // capitalize
2360 if (x >= 'a' && x <= 'f')
2361 x -= 32;
2362 // convert to numeric value
2363 if (x >= '0' && x <= '9')
2364 x -= '0';
2365 else if (x >= 'A' && x <= 'F')
2366 x -= 'A' - 10;
2367 else
2368 continue;
2369
2370 //Uses printf instead of PrintAndLog since the latter
2371 // adds linebreaks to each printout - this way was more convenient since we don't have to
2372 // allocate a string and write to that first...
2373
2374 for(int i= 0 ; i < 4 ; ++i)
2375 printf("%d",(x >> (3 - i)) & 1);
2376 }
2377 printf("\n");
2378
2379 return 0;
2380 }
2381
2382 static command_t CommandTable[] =
2383 {
2384 {"help", CmdHelp, 1, "This help"},
2385 {"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)"},
2386 {"askem410xdemod", CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
2387 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
2388 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking tag from GraphBuffer"},
2389 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
2390 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
2391 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
2392 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
2393 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2394 {"dec", CmdDec, 1, "Decimate samples"},
2395 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
2396 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
2397 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
2398 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
2399 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2400 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2401 {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2402 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
2403 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
2404 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
2405 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
2406 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
2407 {"hide", CmdHide, 1, "Hide graph window"},
2408 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
2409 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2410 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
2411 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
2412 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
2413 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
2414 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
2415 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
2416 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
2417 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
2418 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2419 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
2420 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2421 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
2422 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
2423 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
2424 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2425 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
2426 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
2427 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
2428 {NULL, NULL, 0, NULL}
2429 };
2430
2431 int CmdData(const char *Cmd)
2432 {
2433 CmdsParse(CommandTable, Cmd);
2434 return 0;
2435 }
2436
2437 int CmdHelp(const char *Cmd)
2438 {
2439 CmdsHelp(CommandTable);
2440 return 0;
2441 }
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