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improve hf mf sim x reader attack
[proxmark3-svn] / client / cmddata.c
1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
3 //
4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
5 // at your option, any later version. See the LICENSE.txt file for the text of
6 // the license.
7 //-----------------------------------------------------------------------------
8 // Data and Graph commands
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h> // also included in util.h
12 #include <string.h> // also included in util.h
13 #include <limits.h> // for CmdNorm INT_MIN && INT_MAX
14 #include "data.h" // also included in util.h
15 #include "cmddata.h"
16 #include "util.h"
17 #include "cmdmain.h"
18 #include "proxmark3.h"
19 #include "ui.h" // for show graph controls
20 #include "graph.h" // for graph data
21 #include "cmdparser.h"// already included in cmdmain.h
22 #include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
23 #include "lfdemod.h" // for demod code
24 #include "crc.h" // for pyramid checksum maxim
25 #include "crc16.h" // for FDXB demod checksum
26 #include "loclass/cipherutils.h" // for decimating samples in getsamples
27
28 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
29 uint8_t g_debugMode=0;
30 size_t DemodBufferLen=0;
31 static int CmdHelp(const char *Cmd);
32
33 //set the demod buffer with given array of binary (one bit per byte)
34 //by marshmellow
35 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
36 {
37 if (buff == NULL)
38 return;
39
40 if ( size >= MAX_DEMOD_BUF_LEN)
41 size = MAX_DEMOD_BUF_LEN;
42
43 size_t i = 0;
44 for (; i < size; i++){
45 DemodBuffer[i]=buff[startIdx++];
46 }
47 DemodBufferLen=size;
48 return;
49 }
50
51 int CmdSetDebugMode(const char *Cmd)
52 {
53 int demod=0;
54 sscanf(Cmd, "%i", &demod);
55 g_debugMode=(uint8_t)demod;
56 return 1;
57 }
58
59 int usage_data_printdemodbuf(){
60 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
61 PrintAndLog("Options: ");
62 PrintAndLog(" h This help");
63 PrintAndLog(" x output in hex (omit for binary output)");
64 PrintAndLog(" o <offset> enter offset in # of bits");
65 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
66 return 0;
67 }
68
69 //by marshmellow
70 void printDemodBuff(void)
71 {
72 int bitLen = DemodBufferLen;
73 if (bitLen<1) {
74 PrintAndLog("no bits found in demod buffer");
75 return;
76 }
77 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
78
79 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
80 PrintAndLog("%s",bin);
81
82 return;
83 }
84
85 int CmdPrintDemodBuff(const char *Cmd)
86 {
87 char hex[512]={0x00};
88 bool hexMode = false;
89 bool errors = false;
90 uint32_t offset = 0; //could be size_t but no param_get16...
91 uint32_t length = 512;
92 char cmdp = 0;
93 while(param_getchar(Cmd, cmdp) != 0x00)
94 {
95 switch(param_getchar(Cmd, cmdp))
96 {
97 case 'h':
98 case 'H':
99 return usage_data_printdemodbuf();
100 case 'x':
101 case 'X':
102 hexMode = true;
103 cmdp++;
104 break;
105 case 'o':
106 case 'O':
107 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
108 if (!offset) errors = true;
109 cmdp += 2;
110 break;
111 case 'l':
112 case 'L':
113 length = param_get32ex(Cmd, cmdp+1, 512, 10);
114 if (!length) errors = true;
115 cmdp += 2;
116 break;
117 default:
118 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
119 errors = true;
120 break;
121 }
122 if(errors) break;
123 }
124 //Validations
125 if(errors) return usage_data_printdemodbuf();
126 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
127 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
128
129 if (hexMode){
130 char *buf = (char *) (DemodBuffer + offset);
131 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
132 numBits = binarraytohex(hex, buf, numBits);
133 if (numBits==0) return 0;
134 PrintAndLog("DemodBuffer: %s",hex);
135 } else {
136 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
137 }
138 return 1;
139 }
140
141 //by marshmellow
142 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
143 int CmdGetBitStream(const char *Cmd)
144 {
145 int i;
146 CmdHpf(Cmd);
147 for (i = 0; i < GraphTraceLen; i++) {
148 if (GraphBuffer[i] >= 1) {
149 GraphBuffer[i] = 1;
150 } else {
151 GraphBuffer[i] = 0;
152 }
153 }
154 RepaintGraphWindow();
155 return 0;
156 }
157
158 //by marshmellow
159 //print 64 bit EM410x ID in multiple formats
160 void printEM410x(uint32_t hi, uint64_t id)
161 {
162 if (id || hi){
163 uint64_t iii=1;
164 uint64_t id2lo=0;
165 uint32_t ii=0;
166 uint32_t i=0;
167 for (ii=5; ii>0;ii--){
168 for (i=0;i<8;i++){
169 id2lo=(id2lo<<1LL) | ((id & (iii << (i+((ii-1)*8)))) >> (i+((ii-1)*8)));
170 }
171 }
172 if (hi){
173 //output 88 bit em id
174 PrintAndLog("\nEM TAG ID : %06X%016llX", hi, id);
175 } else{
176 //output 40 bit em id
177 PrintAndLog("\nEM TAG ID : %010llX", id);
178 PrintAndLog("Unique TAG ID : %010llX", id2lo);
179 PrintAndLog("\nPossible de-scramble patterns");
180 PrintAndLog("HoneyWell IdentKey {");
181 PrintAndLog("DEZ 8 : %08lld",id & 0xFFFFFF);
182 PrintAndLog("DEZ 10 : %010lld",id & 0xFFFFFFFF);
183 PrintAndLog("DEZ 5.5 : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
184 PrintAndLog("DEZ 3.5A : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
185 PrintAndLog("DEZ 3.5B : %03lld.%05lld",(id & 0xFF000000) >> 24,(id & 0xFFFF));
186 PrintAndLog("DEZ 3.5C : %03lld.%05lld",(id & 0xFF0000) >> 16,(id & 0xFFFF));
187 PrintAndLog("DEZ 14/IK2 : %014lld",id);
188 PrintAndLog("DEZ 15/IK3 : %015lld",id2lo);
189 PrintAndLog("DEZ 20/ZK : %02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld",
190 (id2lo & 0xf000000000) >> 36,
191 (id2lo & 0x0f00000000) >> 32,
192 (id2lo & 0x00f0000000) >> 28,
193 (id2lo & 0x000f000000) >> 24,
194 (id2lo & 0x0000f00000) >> 20,
195 (id2lo & 0x00000f0000) >> 16,
196 (id2lo & 0x000000f000) >> 12,
197 (id2lo & 0x0000000f00) >> 8,
198 (id2lo & 0x00000000f0) >> 4,
199 (id2lo & 0x000000000f)
200 );
201 uint64_t paxton = (((id>>32) << 24) | (id & 0xffffff)) + 0x143e00;
202 PrintAndLog("}\nOther : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
203 PrintAndLog("Pattern Paxton : %lld [0x%llX]", paxton, paxton);
204
205 uint32_t p1id = (id & 0xFFFFFF);
206 uint8_t arr[32] = {0x00};
207 int i =0;
208 int j = 23;
209 for (; i < 24; ++i, --j ){
210 arr[i] = (p1id >> i) & 1;
211 }
212
213 uint32_t p1 = 0;
214
215 p1 |= arr[23] << 21;
216 p1 |= arr[22] << 23;
217 p1 |= arr[21] << 20;
218 p1 |= arr[20] << 22;
219
220 p1 |= arr[19] << 18;
221 p1 |= arr[18] << 16;
222 p1 |= arr[17] << 19;
223 p1 |= arr[16] << 17;
224
225 p1 |= arr[15] << 13;
226 p1 |= arr[14] << 15;
227 p1 |= arr[13] << 12;
228 p1 |= arr[12] << 14;
229
230 p1 |= arr[11] << 6;
231 p1 |= arr[10] << 2;
232 p1 |= arr[9] << 7;
233 p1 |= arr[8] << 1;
234
235 p1 |= arr[7] << 0;
236 p1 |= arr[6] << 8;
237 p1 |= arr[5] << 11;
238 p1 |= arr[4] << 3;
239
240 p1 |= arr[3] << 10;
241 p1 |= arr[2] << 4;
242 p1 |= arr[1] << 5;
243 p1 |= arr[0] << 9;
244 PrintAndLog("Pattern 1 : %d [0x%X]", p1, p1);
245
246 uint16_t sebury1 = id & 0xFFFF;
247 uint8_t sebury2 = (id >> 16) & 0x7F;
248 uint32_t sebury3 = id & 0x7FFFFF;
249 PrintAndLog("Pattern Sebury : %d %d %d [0x%X 0x%X 0x%X]", sebury1, sebury2, sebury3, sebury1, sebury2, sebury3);
250 }
251 }
252 return;
253 }
254
255 int AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )
256 {
257 size_t idx = 0;
258 size_t BitLen = DemodBufferLen;
259 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
260 memcpy(BitStream, DemodBuffer, BitLen);
261 if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)){
262 //set GraphBuffer for clone or sim command
263 setDemodBuf(BitStream, BitLen, idx);
264 if (g_debugMode){
265 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
266 printDemodBuff();
267 }
268 if (verbose){
269 PrintAndLog("EM410x pattern found: ");
270 printEM410x(*hi, *lo);
271 }
272 return 1;
273 }
274 return 0;
275 }
276
277 int AskEm410xDemod(const char *Cmd, uint32_t *hi, uint64_t *lo, bool verbose)
278 {
279 bool st = TRUE;
280 if (!ASKDemod_ext(Cmd, FALSE, FALSE, 1, &st)) return 0;
281 return AskEm410xDecode(verbose, hi, lo);
282 }
283
284 //by marshmellow
285 //takes 3 arguments - clock, invert and maxErr as integers
286 //attempts to demodulate ask while decoding manchester
287 //prints binary found and saves in graphbuffer for further commands
288 int CmdAskEM410xDemod(const char *Cmd)
289 {
290 char cmdp = param_getchar(Cmd, 0);
291 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
292 PrintAndLog("Usage: data askem410xdemod [clock] <0|1> [maxError]");
293 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
294 PrintAndLog(" <invert>, 1 for invert output");
295 PrintAndLog(" [set maximum allowed errors], default = 100.");
296 PrintAndLog("");
297 PrintAndLog(" sample: data askem410xdemod = demod an EM410x Tag ID from GraphBuffer");
298 PrintAndLog(" : data askem410xdemod 32 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32");
299 PrintAndLog(" : data askem410xdemod 32 1 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32 and inverting data");
300 PrintAndLog(" : data askem410xdemod 1 = demod an EM410x Tag ID from GraphBuffer while inverting data");
301 PrintAndLog(" : data askem410xdemod 64 1 0 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/64 and inverting data and allowing 0 demod errors");
302 return 0;
303 }
304 uint64_t lo = 0;
305 uint32_t hi = 0;
306 return AskEm410xDemod(Cmd, &hi, &lo, true);
307 }
308
309 //by marshmellow
310 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
311 // (amp may not be needed anymore)
312 //verbose will print results and demoding messages
313 //emSearch will auto search for EM410x format in bitstream
314 //askType switches decode: ask/raw = 0, ask/manchester = 1
315 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
316 int invert=0;
317 int clk=0;
318 int maxErr=100;
319 int maxLen=0;
320 uint8_t askAmp = 0;
321 char amp = param_getchar(Cmd, 0);
322 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
323 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
324 if (!maxLen) maxLen = BIGBUF_SIZE;
325 if (invert != 0 && invert != 1) {
326 PrintAndLog("Invalid argument: %s", Cmd);
327 return 0;
328 }
329 if (clk==1){
330 invert=1;
331 clk=0;
332 }
333 if (amp == 'a' || amp == 'A') askAmp=1;
334 size_t BitLen = getFromGraphBuf(BitStream);
335 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
336 if (BitLen < 255) return 0;
337 if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
338 int foundclk = 0;
339 bool st = false;
340 if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk);
341 if (st) {
342 *stCheck = st;
343 clk = (clk == 0) ? foundclk : clk;
344 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator");
345 }
346 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askAmp, askType);
347 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
348 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
349 return 0;
350 }
351 if (errCnt > maxErr){
352 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
353 return 0;
354 }
355 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
356
357 //output
358 setDemodBuf(BitStream,BitLen,0);
359 if (verbose || g_debugMode){
360 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
361 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
362 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
363 // Now output the bitstream to the scrollback by line of 16 bits
364 printDemodBuff();
365
366 }
367 uint64_t lo = 0;
368 uint32_t hi = 0;
369 if (emSearch){
370 AskEm410xDecode(true, &hi, &lo);
371 }
372 return 1;
373 }
374 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
375 bool st = false;
376 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
377 }
378
379 //by marshmellow
380 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
381 //attempts to demodulate ask while decoding manchester
382 //prints binary found and saves in graphbuffer for further commands
383 int Cmdaskmandemod(const char *Cmd)
384 {
385 char cmdp = param_getchar(Cmd, 0);
386 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
387 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
388 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
389 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
390 PrintAndLog(" <invert>, 1 to invert output");
391 PrintAndLog(" [set maximum allowed errors], default = 100");
392 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
393 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
394 PrintAndLog("");
395 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
396 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
397 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
398 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
399 PrintAndLog(" : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
400 return 0;
401 }
402 bool st = TRUE;
403 if (Cmd[0]=='s')
404 return ASKDemod_ext(Cmd++, TRUE, TRUE, 1, &st);
405 else if (Cmd[1] == 's')
406 return ASKDemod_ext(Cmd+=2, TRUE, TRUE, 1, &st);
407 else
408 return ASKDemod(Cmd, TRUE, TRUE, 1);
409 }
410
411 //by marshmellow
412 //manchester decode
413 //stricktly take 10 and 01 and convert to 0 and 1
414 int Cmdmandecoderaw(const char *Cmd)
415 {
416 int i =0;
417 int errCnt=0;
418 size_t size=0;
419 int invert=0;
420 int maxErr = 20;
421 char cmdp = param_getchar(Cmd, 0);
422 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
423 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
424 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
425 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
426 PrintAndLog(" [invert] invert output");
427 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
428 PrintAndLog("");
429 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
430 return 0;
431 }
432 if (DemodBufferLen==0) return 0;
433 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
434 int high=0,low=0;
435 for (;i<DemodBufferLen;++i){
436 if (DemodBuffer[i]>high) high=DemodBuffer[i];
437 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
438 BitStream[i]=DemodBuffer[i];
439 }
440 if (high>7 || low <0 ){
441 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
442 return 0;
443 }
444
445 sscanf(Cmd, "%i %i", &invert, &maxErr);
446 size=i;
447 errCnt=manrawdecode(BitStream, &size, invert);
448 if (errCnt>=maxErr){
449 PrintAndLog("Too many errors: %d",errCnt);
450 return 0;
451 }
452 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
453 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
454 if (errCnt==0){
455 uint64_t id = 0;
456 uint32_t hi = 0;
457 size_t idx=0;
458 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
459 //need to adjust to set bitstream back to manchester encoded data
460 //setDemodBuf(BitStream, size, idx);
461
462 printEM410x(hi, id);
463 }
464 }
465 return 1;
466 }
467
468 //by marshmellow
469 //biphase decode
470 //take 01 or 10 = 0 and 11 or 00 = 1
471 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
472 // and "invert" default = 0 if 1 it will invert output
473 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
474 int CmdBiphaseDecodeRaw(const char *Cmd)
475 {
476 size_t size=0;
477 int offset=0, invert=0, maxErr=20, errCnt=0;
478 char cmdp = param_getchar(Cmd, 0);
479 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
480 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
481 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
482 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
483 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
484 PrintAndLog("");
485 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
486 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
487 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
488 PrintAndLog("");
489 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
490 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
491 return 0;
492 }
493 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
494 if (DemodBufferLen==0){
495 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
496 return 0;
497 }
498 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
499 memcpy(BitStream, DemodBuffer, DemodBufferLen);
500 size = DemodBufferLen;
501 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
502 if (errCnt<0){
503 PrintAndLog("Error during decode:%d", errCnt);
504 return 0;
505 }
506 if (errCnt>maxErr){
507 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
508 return 0;
509 }
510
511 if (errCnt>0){
512 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
513 }
514 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
515 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
516
517 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
518 return 1;
519 }
520
521 //by marshmellow
522 // - ASK Demod then Biphase decode GraphBuffer samples
523 int ASKbiphaseDemod(const char *Cmd, bool verbose)
524 {
525 //ask raw demod GraphBuffer first
526 int offset=0, clk=0, invert=0, maxErr=0;
527 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
528
529 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
530 size_t size = getFromGraphBuf(BitStream);
531 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
532 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
533 if ( errCnt < 0 || errCnt > maxErr ) {
534 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
535 return 0;
536 }
537
538 //attempt to Biphase decode BitStream
539 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
540 if (errCnt < 0){
541 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
542 return 0;
543 }
544 if (errCnt > maxErr) {
545 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
546 return 0;
547 }
548 //success set DemodBuffer and return
549 setDemodBuf(BitStream, size, 0);
550 if (g_debugMode || verbose){
551 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
552 printDemodBuff();
553 }
554 return 1;
555 }
556 //by marshmellow - see ASKbiphaseDemod
557 int Cmdaskbiphdemod(const char *Cmd)
558 {
559 char cmdp = param_getchar(Cmd, 0);
560 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
561 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
562 PrintAndLog(" [offset], offset to begin biphase, default=0");
563 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
564 PrintAndLog(" <invert>, 1 to invert output");
565 PrintAndLog(" [set maximum allowed errors], default = 100");
566 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
567 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
568 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
569 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
570 PrintAndLog(" NOTE: any other arg must have previous args set to work");
571 PrintAndLog("");
572 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
573 PrintAndLog("");
574 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
575 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
576 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
577 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
578 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
579 PrintAndLog(" : data rawdemod ab 0 64 1 0 = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
580 PrintAndLog(" : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
581 return 0;
582 }
583 return ASKbiphaseDemod(Cmd, TRUE);
584 }
585
586 //by marshmellow
587 //attempts to demodulate and identify a G_Prox_II verex/chubb card
588 //WARNING: if it fails during some points it will destroy the DemodBuffer data
589 // but will leave the GraphBuffer intact.
590 //if successful it will push askraw data back to demod buffer ready for emulation
591 int CmdG_Prox_II_Demod(const char *Cmd)
592 {
593 if (!ASKbiphaseDemod(Cmd, FALSE)){
594 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
595 return 0;
596 }
597 size_t size = DemodBufferLen;
598 //call lfdemod.c demod for gProxII
599 int ans = gProxII_Demod(DemodBuffer, &size);
600 if (ans < 0){
601 if (g_debugMode) PrintAndLog("Error gProxII_Demod");
602 return 0;
603 }
604 //got a good demod of 96 bits
605 uint8_t ByteStream[8] = {0x00};
606 uint8_t xorKey=0;
607 size_t startIdx = ans + 6; //start after 6 bit preamble
608
609 uint8_t bits_no_spacer[90];
610 //so as to not mess with raw DemodBuffer copy to a new sample array
611 memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
612 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
613 size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
614 if (bitLen != 72) {
615 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
616 return 0;
617 }
618 // get key and then get all 8 bytes of payload decoded
619 xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
620 for (size_t idx = 0; idx < 8; idx++) {
621 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
622 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
623 }
624 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
625 //
626 uint8_t fmtLen = ByteStream[0]>>2;
627 uint32_t FC = 0;
628 uint32_t Card = 0;
629 //get raw 96 bits to print
630 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
631 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
632 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
633
634 if (fmtLen==36){
635 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
636 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
637 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
638 } else if(fmtLen==26){
639 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
640 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
641 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
642 } else {
643 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
644 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
645 }
646 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
647 setDemodBuf(DemodBuffer+ans, 96, 0);
648 return 1;
649 }
650
651 //by marshmellow
652 //see ASKDemod for what args are accepted
653 int CmdVikingDemod(const char *Cmd)
654 {
655 if (!ASKDemod(Cmd, false, false, 1)) {
656 if (g_debugMode) PrintAndLog("ASKDemod failed");
657 return 0;
658 }
659 size_t size = DemodBufferLen;
660 //call lfdemod.c demod for Viking
661 int ans = VikingDemod_AM(DemodBuffer, &size);
662 if (ans < 0) {
663 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
664 return 0;
665 }
666 //got a good demod
667 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
668 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
669 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
670 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
671 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);
672 PrintAndLog("Raw: %08X%08X", raw1,raw2);
673 setDemodBuf(DemodBuffer+ans, 64, 0);
674 return 1;
675 }
676
677 //by marshmellow - see ASKDemod
678 int Cmdaskrawdemod(const char *Cmd)
679 {
680 char cmdp = param_getchar(Cmd, 0);
681 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
682 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
683 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
684 PrintAndLog(" <invert>, 1 to invert output");
685 PrintAndLog(" [set maximum allowed errors], default = 100");
686 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
687 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
688 PrintAndLog("");
689 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
690 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
691 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
692 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
693 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
694 PrintAndLog(" : data rawdemod ar 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
695 PrintAndLog(" : data rawdemod ar 64 1 0 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
696 return 0;
697 }
698 return ASKDemod(Cmd, TRUE, FALSE, 0);
699 }
700
701 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
702 {
703 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
704 size_t Correlation = 0;
705 int maxSum = 0;
706 int lastMax = 0;
707 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
708 for (int i = 0; i < GraphTraceLen - window; ++i) {
709 int sum = 0;
710 for (int j = 0; j < window; ++j) {
711 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
712 }
713 CorrelBuffer[i] = sum;
714 if (sum >= maxSum-100 && sum <= maxSum+100){
715 //another max
716 Correlation = i-lastMax;
717 lastMax = i;
718 if (sum > maxSum) maxSum = sum;
719 } else if (sum > maxSum){
720 maxSum=sum;
721 lastMax = i;
722 }
723 }
724 if (Correlation==0){
725 //try again with wider margin
726 for (int i = 0; i < GraphTraceLen - window; i++){
727 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
728 //another max
729 Correlation = i-lastMax;
730 lastMax = i;
731 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
732 }
733 }
734 }
735 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
736
737 if (SaveGrph){
738 GraphTraceLen = GraphTraceLen - window;
739 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
740 RepaintGraphWindow();
741 }
742 return Correlation;
743 }
744
745 int usage_data_autocorr(void)
746 {
747 //print help
748 PrintAndLog("Usage: data autocorr [window] [g]");
749 PrintAndLog("Options: ");
750 PrintAndLog(" h This help");
751 PrintAndLog(" [window] window length for correlation - default = 4000");
752 PrintAndLog(" g save back to GraphBuffer (overwrite)");
753 return 0;
754 }
755
756 int CmdAutoCorr(const char *Cmd)
757 {
758 char cmdp = param_getchar(Cmd, 0);
759 if (cmdp == 'h' || cmdp == 'H')
760 return usage_data_autocorr();
761 int window = 4000; //set default
762 char grph=0;
763 bool updateGrph = FALSE;
764 sscanf(Cmd, "%i %c", &window, &grph);
765
766 if (window >= GraphTraceLen) {
767 PrintAndLog("window must be smaller than trace (%d samples)",
768 GraphTraceLen);
769 return 0;
770 }
771 if (grph == 'g') updateGrph=TRUE;
772 return AutoCorrelate(window, updateGrph, TRUE);
773 }
774
775 int CmdBitsamples(const char *Cmd)
776 {
777 int cnt = 0;
778 uint8_t got[12288];
779
780 GetFromBigBuf(got,sizeof(got),0);
781 WaitForResponse(CMD_ACK,NULL);
782
783 for (int j = 0; j < sizeof(got); j++) {
784 for (int k = 0; k < 8; k++) {
785 if(got[j] & (1 << (7 - k))) {
786 GraphBuffer[cnt++] = 1;
787 } else {
788 GraphBuffer[cnt++] = 0;
789 }
790 }
791 }
792 GraphTraceLen = cnt;
793 RepaintGraphWindow();
794 return 0;
795 }
796
797 int CmdBuffClear(const char *Cmd)
798 {
799 UsbCommand c = {CMD_BUFF_CLEAR};
800 SendCommand(&c);
801 ClearGraph(true);
802 return 0;
803 }
804
805 int CmdDec(const char *Cmd)
806 {
807 for (int i = 0; i < (GraphTraceLen / 2); ++i)
808 GraphBuffer[i] = GraphBuffer[i * 2];
809 GraphTraceLen /= 2;
810 PrintAndLog("decimated by 2");
811 RepaintGraphWindow();
812 return 0;
813 }
814 /**
815 * Undecimate - I'd call it 'interpolate', but we'll save that
816 * name until someone does an actual interpolation command, not just
817 * blindly repeating samples
818 * @param Cmd
819 * @return
820 */
821 int CmdUndec(const char *Cmd)
822 {
823 if(param_getchar(Cmd, 0) == 'h')
824 {
825 PrintAndLog("Usage: data undec [factor]");
826 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
827 PrintAndLog("Options: ");
828 PrintAndLog(" h This help");
829 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
830 PrintAndLog("Example: 'data undec 3'");
831 return 0;
832 }
833
834 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
835 //We have memory, don't we?
836 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
837 uint32_t g_index = 0, s_index = 0;
838 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
839 {
840 int count = 0;
841 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
842 swap[s_index+count] = GraphBuffer[g_index];
843
844 s_index += count;
845 g_index++;
846 }
847
848 memcpy(GraphBuffer, swap, s_index * sizeof(int));
849 GraphTraceLen = s_index;
850 RepaintGraphWindow();
851 return 0;
852 }
853
854 //by marshmellow
855 //shift graph zero up or down based on input + or -
856 int CmdGraphShiftZero(const char *Cmd)
857 {
858
859 int shift=0;
860 //set options from parameters entered with the command
861 sscanf(Cmd, "%i", &shift);
862 int shiftedVal=0;
863 for(int i = 0; i<GraphTraceLen; i++){
864 shiftedVal=GraphBuffer[i]+shift;
865 if (shiftedVal>127)
866 shiftedVal=127;
867 else if (shiftedVal<-127)
868 shiftedVal=-127;
869 GraphBuffer[i]= shiftedVal;
870 }
871 CmdNorm("");
872 return 0;
873 }
874
875 //by marshmellow
876 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
877 //similar to dirtheshold, threshold commands
878 //takes a threshold length which is the measured length between two samples then determines an edge
879 int CmdAskEdgeDetect(const char *Cmd)
880 {
881 int thresLen = 25;
882 int Last = 0;
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 Last = 127;
888 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
889 Last = -127;
890 GraphBuffer[i-1] = Last;
891 }
892 RepaintGraphWindow();
893 return 0;
894 }
895
896 /* Print our clock rate */
897 // uses data from graphbuffer
898 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
899 int CmdDetectClockRate(const char *Cmd)
900 {
901 char cmdp = param_getchar(Cmd, 0);
902 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
903 PrintAndLog("Usage: data detectclock [modulation] <clock>");
904 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
905 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
906 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
907 PrintAndLog("");
908 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
909 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
910 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
911 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
912 }
913 int ans=0;
914 if (cmdp == 'a'){
915 ans = GetAskClock(Cmd+1, true, false);
916 } else if (cmdp == 'f'){
917 ans = GetFskClock("", true, false);
918 } else if (cmdp == 'n'){
919 ans = GetNrzClock("", true, false);
920 } else if (cmdp == 'p'){
921 ans = GetPskClock("", true, false);
922 } else {
923 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
924 }
925 return ans;
926 }
927
928 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
929 {
930 static char fType[8];
931 memset(fType, 0x00, 8);
932 char *fskType = fType;
933 if (fchigh==10 && fclow==8){
934 if (invert) //fsk2a
935 memcpy(fskType, "FSK2a", 5);
936 else //fsk2
937 memcpy(fskType, "FSK2", 4);
938 } else if (fchigh == 8 && fclow == 5) {
939 if (invert)
940 memcpy(fskType, "FSK1", 4);
941 else
942 memcpy(fskType, "FSK1a", 5);
943 } else {
944 memcpy(fskType, "FSK??", 5);
945 }
946 return fskType;
947 }
948
949 //by marshmellow
950 //fsk raw demod and print binary
951 //takes 4 arguments - Clock, invert, fchigh, fclow
952 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
953 int FSKrawDemod(const char *Cmd, bool verbose)
954 {
955 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
956 uint8_t rfLen, invert, fchigh, fclow;
957 //set defaults
958 //set options from parameters entered with the command
959 rfLen = param_get8(Cmd, 0);
960 invert = param_get8(Cmd, 1);
961 fchigh = param_get8(Cmd, 2);
962 fclow = param_get8(Cmd, 3);
963
964 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
965 if (rfLen==1) {
966 invert = 1; //if invert option only is used
967 rfLen = 0;
968 }
969 }
970 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
971 size_t BitLen = getFromGraphBuf(BitStream);
972 if (BitLen==0) return 0;
973 //get field clock lengths
974 uint16_t fcs=0;
975 if (!fchigh || !fclow) {
976 fcs = countFC(BitStream, BitLen, 1);
977 if (!fcs) {
978 fchigh = 10;
979 fclow = 8;
980 } else {
981 fchigh = (fcs >> 8) & 0x00FF;
982 fclow = fcs & 0x00FF;
983 }
984 }
985 //get bit clock length
986 if (!rfLen) {
987 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
988 if (!rfLen) rfLen = 50;
989 }
990 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
991 if (size > 0) {
992 setDemodBuf(BitStream,size,0);
993
994 // Now output the bitstream to the scrollback by line of 16 bits
995 if (verbose || g_debugMode) {
996 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
997 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
998 printDemodBuff();
999 }
1000
1001 return 1;
1002 } else {
1003 if (g_debugMode) PrintAndLog("no FSK data found");
1004 }
1005 return 0;
1006 }
1007
1008 //by marshmellow
1009 //fsk raw demod and print binary
1010 //takes 4 arguments - Clock, invert, fchigh, fclow
1011 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
1012 int CmdFSKrawdemod(const char *Cmd)
1013 {
1014 char cmdp = param_getchar(Cmd, 0);
1015 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1016 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
1017 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
1018 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
1019 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
1020 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
1021 PrintAndLog("");
1022 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
1023 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
1024 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
1025 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
1026 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
1027 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
1028 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
1029 return 0;
1030 }
1031 return FSKrawDemod(Cmd, TRUE);
1032 }
1033
1034 //by marshmellow (based on existing demod + holiman's refactor)
1035 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
1036 //print full HID Prox ID and some bit format details if found
1037 int CmdFSKdemodHID(const char *Cmd)
1038 {
1039 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1040 uint32_t hi2=0, hi=0, lo=0;
1041
1042 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1043 size_t BitLen = getFromGraphBuf(BitStream);
1044 if (BitLen==0) return 0;
1045 //get binary from fsk wave
1046 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1047 if (idx<0){
1048 if (g_debugMode){
1049 if (idx==-1){
1050 PrintAndLog("DEBUG: Just Noise Detected");
1051 } else if (idx == -2) {
1052 PrintAndLog("DEBUG: Error demoding fsk");
1053 } else if (idx == -3) {
1054 PrintAndLog("DEBUG: Preamble not found");
1055 } else if (idx == -4) {
1056 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
1057 } else {
1058 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1059 }
1060 }
1061 return 0;
1062 }
1063 if (hi2==0 && hi==0 && lo==0) {
1064 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
1065 return 0;
1066 }
1067 if (hi2 != 0){ //extra large HID tags
1068 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
1069 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
1070 }
1071 else { //standard HID tags <38 bits
1072 uint8_t fmtLen = 0;
1073 uint32_t fc = 0;
1074 uint32_t cardnum = 0;
1075 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
1076 uint32_t lo2=0;
1077 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
1078 uint8_t idx3 = 1;
1079 while(lo2>1){ //find last bit set to 1 (format len bit)
1080 lo2=lo2>>1;
1081 idx3++;
1082 }
1083 fmtLen =idx3+19;
1084 fc =0;
1085 cardnum=0;
1086 if(fmtLen==26){
1087 cardnum = (lo>>1)&0xFFFF;
1088 fc = (lo>>17)&0xFF;
1089 }
1090 if(fmtLen==34){
1091 cardnum = (lo>>1)&0xFFFF;
1092 fc= ((hi&1)<<15)|(lo>>17);
1093 }
1094 if(fmtLen==35){
1095 cardnum = (lo>>1)&0xFFFFF;
1096 fc = ((hi&1)<<11)|(lo>>21);
1097 }
1098 }
1099 else { //if bit 38 is not set then 37 bit format is used
1100 fmtLen = 37;
1101 fc = 0;
1102 cardnum = 0;
1103 if(fmtLen == 37){
1104 cardnum = (lo>>1)&0x7FFFF;
1105 fc = ((hi&0xF)<<12)|(lo>>20);
1106 }
1107 }
1108 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
1109 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
1110 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
1111 }
1112 setDemodBuf(BitStream,BitLen,idx);
1113 if (g_debugMode){
1114 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
1115 printDemodBuff();
1116 }
1117 return 1;
1118 }
1119
1120 //by marshmellow
1121 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
1122 //print full Paradox Prox ID and some bit format details if found
1123 int CmdFSKdemodParadox(const char *Cmd)
1124 {
1125 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1126 uint32_t hi2=0, hi=0, lo=0;
1127
1128 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1129 size_t BitLen = getFromGraphBuf(BitStream);
1130 if (BitLen==0) return 0;
1131 //get binary from fsk wave
1132 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1133 if (idx<0){
1134 if (g_debugMode){
1135 if (idx==-1){
1136 PrintAndLog("DEBUG: Just Noise Detected");
1137 } else if (idx == -2) {
1138 PrintAndLog("DEBUG: Error demoding fsk");
1139 } else if (idx == -3) {
1140 PrintAndLog("DEBUG: Preamble not found");
1141 } else if (idx == -4) {
1142 PrintAndLog("DEBUG: Error in Manchester data");
1143 } else {
1144 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1145 }
1146 }
1147 return 0;
1148 }
1149 if (hi2==0 && hi==0 && lo==0){
1150 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1151 return 0;
1152 }
1153 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1154 uint32_t cardnum = (lo>>10)&0xFFFF;
1155 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1156 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1157 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1158
1159 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1160 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
1161 setDemodBuf(BitStream,BitLen,idx);
1162 if (g_debugMode){
1163 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1164 printDemodBuff();
1165 }
1166 return 1;
1167 }
1168
1169 //by marshmellow
1170 //IO-Prox demod - FSK RF/64 with preamble of 000000001
1171 //print ioprox ID and some format details
1172 int CmdFSKdemodIO(const char *Cmd)
1173 {
1174 int idx=0;
1175 //something in graphbuffer?
1176 if (GraphTraceLen < 65) {
1177 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1178 return 0;
1179 }
1180 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1181 size_t BitLen = getFromGraphBuf(BitStream);
1182 if (BitLen==0) return 0;
1183
1184 //get binary from fsk wave
1185 idx = IOdemodFSK(BitStream,BitLen);
1186 if (idx<0){
1187 if (g_debugMode){
1188 if (idx==-1){
1189 PrintAndLog("DEBUG: Just Noise Detected");
1190 } else if (idx == -2) {
1191 PrintAndLog("DEBUG: not enough samples");
1192 } else if (idx == -3) {
1193 PrintAndLog("DEBUG: error during fskdemod");
1194 } else if (idx == -4) {
1195 PrintAndLog("DEBUG: Preamble not found");
1196 } else if (idx == -5) {
1197 PrintAndLog("DEBUG: Separator bits not found");
1198 } else {
1199 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1200 }
1201 }
1202 return 0;
1203 }
1204 if (idx==0){
1205 if (g_debugMode){
1206 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1207 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
1208 }
1209 return 0;
1210 }
1211 //Index map
1212 //0 10 20 30 40 50 60
1213 //| | | | | | |
1214 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1215 //-----------------------------------------------------------------------------
1216 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1217 //
1218 //XSF(version)facility:codeone+codetwo (raw)
1219 //Handle the data
1220 if (idx+64>BitLen) {
1221 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1222 return 0;
1223 }
1224 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]);
1225 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]);
1226 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]);
1227 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]);
1228 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]);
1229 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]);
1230 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]);
1231
1232 uint32_t code = bytebits_to_byte(BitStream+idx,32);
1233 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
1234 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1235 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
1236 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
1237 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
1238 uint16_t calccrc = 0;
1239
1240 for (uint8_t i=1; i<6; ++i){
1241 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
1242 }
1243 calccrc &= 0xff;
1244 calccrc = 0xff - calccrc;
1245
1246 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
1247
1248 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
1249 setDemodBuf(BitStream,64,idx);
1250 if (g_debugMode){
1251 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1252 printDemodBuff();
1253 }
1254 return 1;
1255 }
1256
1257 //by marshmellow
1258 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1259 //print full AWID Prox ID and some bit format details if found
1260 int CmdFSKdemodAWID(const char *Cmd)
1261 {
1262 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1263 size_t size = getFromGraphBuf(BitStream);
1264 if (size==0) return 0;
1265
1266 //get binary from fsk wave
1267 int idx = AWIDdemodFSK(BitStream, &size);
1268 if (idx<=0){
1269 if (g_debugMode){
1270 if (idx == -1)
1271 PrintAndLog("DEBUG: Error - not enough samples");
1272 else if (idx == -2)
1273 PrintAndLog("DEBUG: Error - only noise found");
1274 else if (idx == -3)
1275 PrintAndLog("DEBUG: Error - problem during FSK demod");
1276 else if (idx == -4)
1277 PrintAndLog("DEBUG: Error - AWID preamble not found");
1278 else if (idx == -5)
1279 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1280 else
1281 PrintAndLog("DEBUG: Error %d",idx);
1282 }
1283 return 0;
1284 }
1285
1286 // Index map
1287 // 0 10 20 30 40 50 60
1288 // | | | | | | |
1289 // 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
1290 // -----------------------------------------------------------------------------
1291 // 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
1292 // 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
1293 // |---26 bit---| |-----117----||-------------142-------------|
1294 // b = format bit len, o = odd parity of last 3 bits
1295 // f = facility code, c = card number
1296 // w = wiegand parity
1297 // (26 bit format shown)
1298
1299 //get raw ID before removing parities
1300 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1301 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1302 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1303 setDemodBuf(BitStream,96,idx);
1304
1305 size = removeParity(BitStream, idx+8, 4, 1, 88);
1306 if (size != 66){
1307 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1308 return 0;
1309 }
1310 // ok valid card found!
1311
1312 // Index map
1313 // 0 10 20 30 40 50 60
1314 // | | | | | | |
1315 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1316 // -----------------------------------------------------------------------------
1317 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1318 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1319 // |26 bit| |-117--| |-----142------|
1320 // b = format bit len, o = odd parity of last 3 bits
1321 // f = facility code, c = card number
1322 // w = wiegand parity
1323 // (26 bit format shown)
1324
1325 uint32_t fc = 0;
1326 uint32_t cardnum = 0;
1327 uint32_t code1 = 0;
1328 uint32_t code2 = 0;
1329 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
1330 if (fmtLen==26){
1331 fc = bytebits_to_byte(BitStream+9, 8);
1332 cardnum = bytebits_to_byte(BitStream+17, 16);
1333 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1334 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1335 } else {
1336 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1337 if (fmtLen>32){
1338 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1339 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
1340 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1341 } else{
1342 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1343 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1344 }
1345 }
1346 if (g_debugMode){
1347 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1348 printDemodBuff();
1349 }
1350 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
1351 return 1;
1352 }
1353
1354 //by marshmellow
1355 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1356 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1357 int CmdFSKdemodPyramid(const char *Cmd)
1358 {
1359 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1360 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1361 size_t size = getFromGraphBuf(BitStream);
1362 if (size==0) return 0;
1363
1364 //get binary from fsk wave
1365 int idx = PyramiddemodFSK(BitStream, &size);
1366 if (idx < 0){
1367 if (g_debugMode){
1368 if (idx == -5)
1369 PrintAndLog("DEBUG: Error - not enough samples");
1370 else if (idx == -1)
1371 PrintAndLog("DEBUG: Error - only noise found");
1372 else if (idx == -2)
1373 PrintAndLog("DEBUG: Error - problem during FSK demod");
1374 else if (idx == -3)
1375 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1376 else if (idx == -4)
1377 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1378 else
1379 PrintAndLog("DEBUG: Error - idx: %d",idx);
1380 }
1381 return 0;
1382 }
1383 // Index map
1384 // 0 10 20 30 40 50 60
1385 // | | | | | | |
1386 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1387 // -----------------------------------------------------------------------------
1388 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1389 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1390
1391 // 64 70 80 90 100 110 120
1392 // | | | | | | |
1393 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1394 // -----------------------------------------------------------------------------
1395 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1396 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1397 // |---115---||---------71---------|
1398 // s = format start bit, o = odd parity of last 7 bits
1399 // f = facility code, c = card number
1400 // w = wiegand parity, x = extra space for other formats
1401 // p = unknown checksum
1402 // (26 bit format shown)
1403
1404 //get bytes for checksum calc
1405 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
1406 uint8_t csBuff[14] = {0x00};
1407 for (uint8_t i = 0; i < 13; i++){
1408 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
1409 }
1410 //check checksum calc
1411 //checksum calc thanks to ICEMAN!!
1412 uint32_t checkCS = CRC8Maxim(csBuff,13);
1413
1414 //get raw ID before removing parities
1415 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1416 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1417 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1418 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
1419 setDemodBuf(BitStream,128,idx);
1420
1421 size = removeParity(BitStream, idx+8, 8, 1, 120);
1422 if (size != 105){
1423 if (g_debugMode)
1424 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1425 return 0;
1426 }
1427
1428 // ok valid card found!
1429
1430 // Index map
1431 // 0 10 20 30 40 50 60 70
1432 // | | | | | | | |
1433 // 01234567890123456789012345678901234567890123456789012345678901234567890
1434 // -----------------------------------------------------------------------
1435 // 00000000000000000000000000000000000000000000000000000000000000000000000
1436 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1437
1438 // 71 80 90 100
1439 // | | | |
1440 // 1 2 34567890 1234567890123456 7 8901234
1441 // ---------------------------------------
1442 // 1 1 01110011 0000000001000110 0 1001010
1443 // s w ffffffff cccccccccccccccc w ppppppp
1444 // |--115-| |------71------|
1445 // s = format start bit, o = odd parity of last 7 bits
1446 // f = facility code, c = card number
1447 // w = wiegand parity, x = extra space for other formats
1448 // p = unknown checksum
1449 // (26 bit format shown)
1450
1451 //find start bit to get fmtLen
1452 int j;
1453 for (j=0; j<size; j++){
1454 if(BitStream[j]) break;
1455 }
1456 uint8_t fmtLen = size-j-8;
1457 uint32_t fc = 0;
1458 uint32_t cardnum = 0;
1459 uint32_t code1 = 0;
1460 if (fmtLen==26){
1461 fc = bytebits_to_byte(BitStream+73, 8);
1462 cardnum = bytebits_to_byte(BitStream+81, 16);
1463 code1 = bytebits_to_byte(BitStream+72,fmtLen);
1464 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);
1465 } else if (fmtLen==45){
1466 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
1467 fc = bytebits_to_byte(BitStream+53, 10);
1468 cardnum = bytebits_to_byte(BitStream+63, 32);
1469 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1470 } else {
1471 cardnum = bytebits_to_byte(BitStream+81, 16);
1472 if (fmtLen>32){
1473 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
1474 //code2 = bytebits_to_byte(BitStream+(size-32),32);
1475 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1476 } else{
1477 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
1478 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1479 }
1480 }
1481 if (checksum == checkCS)
1482 PrintAndLog("Checksum %02x passed", checksum);
1483 else
1484 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
1485
1486 if (g_debugMode){
1487 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1488 printDemodBuff();
1489 }
1490 return 1;
1491 }
1492
1493 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
1494 // 8 databits + 1 parity (1)
1495 // CIITT 16 chksum
1496 // NATIONAL CODE, ICAR database
1497 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
1498 // FLAG (animal/non-animal)
1499 /*
1500 38 IDbits
1501 10 country code
1502 1 extra app bit
1503 14 reserved bits
1504 1 animal bit
1505 16 ccitt CRC chksum over 64bit ID CODE.
1506 24 appli bits.
1507
1508 -- sample: 985121004515220 [ 37FF65B88EF94 ]
1509 */
1510 int CmdFDXBdemodBI(const char *Cmd){
1511
1512 int invert = 1;
1513 int clk = 32;
1514 int errCnt = 0;
1515 int maxErr = 0;
1516 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
1517 size_t size = getFromGraphBuf(BitStream);
1518
1519 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
1520 if ( errCnt < 0 || errCnt > maxErr ) {
1521 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
1522 return 0;
1523 }
1524
1525 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
1526 if (errCnt < 0 || errCnt > maxErr ) {
1527 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
1528 return 0;
1529 }
1530
1531 int preambleIndex = FDXBdemodBI(BitStream, &size);
1532 if (preambleIndex < 0){
1533 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
1534 return 0;
1535 }
1536 if (size != 128) {
1537 if (g_debugMode) PrintAndLog("Error incorrect data length found");
1538 return 0;
1539 }
1540
1541 setDemodBuf(BitStream, 128, preambleIndex);
1542
1543 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
1544 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
1545 if ( size != 104 ) {
1546 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1547 return 0;
1548 }
1549 if (g_debugMode) {
1550 char *bin = sprint_bin_break(BitStream,size,16);
1551 PrintAndLog("DEBUG BinStream:\n%s",bin);
1552 }
1553 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1554 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1555
1556 //got a good demod
1557 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1558 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1559 uint8_t dataBlockBit = BitStream[48];
1560 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1561 uint8_t animalBit = BitStream[63];
1562 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1563 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1564
1565 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1566 uint8_t raw[8];
1567 num_to_bytes(rawid, 8, raw);
1568
1569 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1570
1571 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1572 PrintAndLog("Animal ID: %04u-%012llu", countryCode, NationalCode);
1573 PrintAndLog("National Code: %012llu", NationalCode);
1574 PrintAndLog("CountryCode: %04u", countryCode);
1575 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1576 PrintAndLog("reserved Code: %u", reservedCode);
1577 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1578 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1579 PrintAndLog("Extended: 0x%X\n", extended);
1580
1581 return 1;
1582 }
1583
1584
1585 //by marshmellow
1586 //attempt to psk1 demod graph buffer
1587 int PSKDemod(const char *Cmd, bool verbose)
1588 {
1589 int invert=0;
1590 int clk=0;
1591 int maxErr=100;
1592 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1593 if (clk==1){
1594 invert=1;
1595 clk=0;
1596 }
1597 if (invert != 0 && invert != 1) {
1598 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1599 return 0;
1600 }
1601 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1602 size_t BitLen = getFromGraphBuf(BitStream);
1603 if (BitLen==0) return 0;
1604 uint8_t carrier=countFC(BitStream, BitLen, 0);
1605 if (carrier!=2 && carrier!=4 && carrier!=8){
1606 //invalid carrier
1607 return 0;
1608 }
1609 if (g_debugMode){
1610 PrintAndLog("Carrier: rf/%d",carrier);
1611 }
1612 int errCnt=0;
1613 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1614 if (errCnt > maxErr){
1615 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1616 return 0;
1617 }
1618 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1619 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1620 return 0;
1621 }
1622 if (verbose || g_debugMode){
1623 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1624 if (errCnt>0){
1625 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1626 }
1627 }
1628 //prime demod buffer for output
1629 setDemodBuf(BitStream,BitLen,0);
1630 return 1;
1631 }
1632
1633 // Indala 26 bit decode
1634 // by marshmellow
1635 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1636 int CmdIndalaDecode(const char *Cmd)
1637 {
1638 int ans;
1639 if (strlen(Cmd)>0){
1640 ans = PSKDemod(Cmd, 0);
1641 } else{ //default to RF/32
1642 ans = PSKDemod("32", 0);
1643 }
1644
1645 if (!ans){
1646 if (g_debugMode)
1647 PrintAndLog("Error1: %d",ans);
1648 return 0;
1649 }
1650 uint8_t invert=0;
1651 size_t size = DemodBufferLen;
1652 int startIdx = indala26decode(DemodBuffer, &size, &invert);
1653 if (startIdx < 0 || size > 224) {
1654 if (g_debugMode)
1655 PrintAndLog("Error2: %d",ans);
1656 return -1;
1657 }
1658 setDemodBuf(DemodBuffer, size, (size_t)startIdx);
1659 if (invert)
1660 if (g_debugMode)
1661 PrintAndLog("Had to invert bits");
1662
1663 PrintAndLog("BitLen: %d",DemodBufferLen);
1664 //convert UID to HEX
1665 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1666 uid1=bytebits_to_byte(DemodBuffer,32);
1667 uid2=bytebits_to_byte(DemodBuffer+32,32);
1668 if (DemodBufferLen==64) {
1669 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1670 } else {
1671 uid3=bytebits_to_byte(DemodBuffer+64,32);
1672 uid4=bytebits_to_byte(DemodBuffer+96,32);
1673 uid5=bytebits_to_byte(DemodBuffer+128,32);
1674 uid6=bytebits_to_byte(DemodBuffer+160,32);
1675 uid7=bytebits_to_byte(DemodBuffer+192,32);
1676 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1677 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1678 }
1679 if (g_debugMode){
1680 PrintAndLog("DEBUG: printing demodbuffer:");
1681 printDemodBuff();
1682 }
1683 return 1;
1684 }
1685
1686 int CmdPSKNexWatch(const char *Cmd)
1687 {
1688 if (!PSKDemod("", false)) return 0;
1689 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};
1690 size_t startIdx = 0, size = DemodBufferLen;
1691 bool invert = false;
1692 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1693 // if didn't find preamble try again inverting
1694 if (!PSKDemod("1", false)) return 0;
1695 size = DemodBufferLen;
1696 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1697 invert = true;
1698 }
1699 if (size != 128) return 0;
1700 setDemodBuf(DemodBuffer, size, startIdx+4);
1701 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1702 //get ID
1703 uint32_t ID = 0;
1704 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1705 for (uint8_t idx=0; idx<8; idx++){
1706 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1707 }
1708 }
1709 //parity check (TBD)
1710
1711 //checksum check (TBD)
1712
1713 //output
1714 PrintAndLog("NexWatch ID: %d", ID);
1715 if (invert){
1716 PrintAndLog("Had to Invert - probably NexKey");
1717 for (uint8_t idx=0; idx<size; idx++)
1718 DemodBuffer[idx] ^= 1;
1719 }
1720
1721 CmdPrintDemodBuff("x");
1722 return 1;
1723 }
1724
1725 // by marshmellow
1726 // takes 3 arguments - clock, invert, maxErr as integers
1727 // attempts to demodulate nrz only
1728 // prints binary found and saves in demodbuffer for further commands
1729 int NRZrawDemod(const char *Cmd, bool verbose)
1730 {
1731 int invert=0;
1732 int clk=0;
1733 int maxErr=100;
1734 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1735 if (clk==1){
1736 invert=1;
1737 clk=0;
1738 }
1739 if (invert != 0 && invert != 1) {
1740 PrintAndLog("Invalid argument: %s", Cmd);
1741 return 0;
1742 }
1743 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1744 size_t BitLen = getFromGraphBuf(BitStream);
1745 if (BitLen==0) return 0;
1746 int errCnt=0;
1747 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
1748 if (errCnt > maxErr){
1749 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1750 return 0;
1751 }
1752 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1753 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1754 return 0;
1755 }
1756 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1757 //prime demod buffer for output
1758 setDemodBuf(BitStream,BitLen,0);
1759
1760 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1761 if (verbose || g_debugMode) {
1762 PrintAndLog("NRZ demoded bitstream:");
1763 // Now output the bitstream to the scrollback by line of 16 bits
1764 printDemodBuff();
1765 }
1766 return 1;
1767 }
1768
1769 int CmdNRZrawDemod(const char *Cmd)
1770 {
1771 char cmdp = param_getchar(Cmd, 0);
1772 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1773 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1774 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1775 PrintAndLog(" <invert>, 1 for invert output");
1776 PrintAndLog(" [set maximum allowed errors], default = 100.");
1777 PrintAndLog("");
1778 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1779 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1780 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1781 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1782 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");
1783 return 0;
1784 }
1785 return NRZrawDemod(Cmd, TRUE);
1786 }
1787
1788 // by marshmellow
1789 // takes 3 arguments - clock, invert, maxErr as integers
1790 // attempts to demodulate psk only
1791 // prints binary found and saves in demodbuffer for further commands
1792 int CmdPSK1rawDemod(const char *Cmd)
1793 {
1794 int ans;
1795 char cmdp = param_getchar(Cmd, 0);
1796 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1797 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1798 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1799 PrintAndLog(" <invert>, 1 for invert output");
1800 PrintAndLog(" [set maximum allowed errors], default = 100.");
1801 PrintAndLog("");
1802 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1803 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1804 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1805 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1806 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");
1807 return 0;
1808 }
1809 ans = PSKDemod(Cmd, TRUE);
1810 //output
1811 if (!ans){
1812 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1813 return 0;
1814 }
1815
1816 PrintAndLog("PSK1 demoded bitstream:");
1817 // Now output the bitstream to the scrollback by line of 16 bits
1818 printDemodBuff();
1819 return 1;
1820 }
1821
1822 // by marshmellow
1823 // takes same args as cmdpsk1rawdemod
1824 int CmdPSK2rawDemod(const char *Cmd)
1825 {
1826 int ans=0;
1827 char cmdp = param_getchar(Cmd, 0);
1828 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1829 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1830 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1831 PrintAndLog(" <invert>, 1 for invert output");
1832 PrintAndLog(" [set maximum allowed errors], default = 100.");
1833 PrintAndLog("");
1834 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1835 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1836 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1837 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1838 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");
1839 return 0;
1840 }
1841 ans=PSKDemod(Cmd, TRUE);
1842 if (!ans){
1843 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1844 return 0;
1845 }
1846 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1847 PrintAndLog("PSK2 demoded bitstream:");
1848 // Now output the bitstream to the scrollback by line of 16 bits
1849 printDemodBuff();
1850 return 1;
1851 }
1852
1853 // by marshmellow - combines all raw demod functions into one menu command
1854 int CmdRawDemod(const char *Cmd)
1855 {
1856 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1857
1858 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1859 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1860 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1861 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1862 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1863 PrintAndLog(" <options> see specific modulation help for optional parameters");
1864 PrintAndLog("");
1865 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1866 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1867 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1868 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1869 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1870 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1871 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1872 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1873 return 0;
1874 }
1875 char cmdp2 = Cmd[1];
1876 int ans = 0;
1877 if (cmdp == 'f' && cmdp2 == 's'){
1878 ans = CmdFSKrawdemod(Cmd+2);
1879 } else if(cmdp == 'a' && cmdp2 == 'b'){
1880 ans = Cmdaskbiphdemod(Cmd+2);
1881 } else if(cmdp == 'a' && cmdp2 == 'm'){
1882 ans = Cmdaskmandemod(Cmd+2);
1883 } else if(cmdp == 'a' && cmdp2 == 'r'){
1884 ans = Cmdaskrawdemod(Cmd+2);
1885 } else if(cmdp == 'n' && cmdp2 == 'r'){
1886 ans = CmdNRZrawDemod(Cmd+2);
1887 } else if(cmdp == 'p' && cmdp2 == '1'){
1888 ans = CmdPSK1rawDemod(Cmd+2);
1889 } else if(cmdp == 'p' && cmdp2 == '2'){
1890 ans = CmdPSK2rawDemod(Cmd+2);
1891 } else {
1892 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1893 }
1894 return ans;
1895 }
1896
1897 int CmdGrid(const char *Cmd)
1898 {
1899 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1900 PlotGridXdefault= PlotGridX;
1901 PlotGridYdefault= PlotGridY;
1902 RepaintGraphWindow();
1903 return 0;
1904 }
1905
1906 int CmdHexsamples(const char *Cmd)
1907 {
1908 int i, j;
1909 int requested = 0;
1910 int offset = 0;
1911 char string_buf[25];
1912 char* string_ptr = string_buf;
1913 uint8_t got[BIGBUF_SIZE];
1914
1915 sscanf(Cmd, "%i %i", &requested, &offset);
1916
1917 /* if no args send something */
1918 if (requested == 0) {
1919 requested = 8;
1920 }
1921 if (offset + requested > sizeof(got)) {
1922 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1923 return 0;
1924 }
1925
1926 GetFromBigBuf(got,requested,offset);
1927 WaitForResponse(CMD_ACK,NULL);
1928
1929 i = 0;
1930 for (j = 0; j < requested; j++) {
1931 i++;
1932 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1933 if (i == 8) {
1934 *(string_ptr - 1) = '\0'; // remove the trailing space
1935 PrintAndLog("%s", string_buf);
1936 string_buf[0] = '\0';
1937 string_ptr = string_buf;
1938 i = 0;
1939 }
1940 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1941 *(string_ptr - 1) = '\0';
1942 PrintAndLog("%s", string_buf);
1943 string_buf[0] = '\0';
1944 }
1945 }
1946 return 0;
1947 }
1948
1949 int CmdHide(const char *Cmd)
1950 {
1951 HideGraphWindow();
1952 return 0;
1953 }
1954
1955 //zero mean GraphBuffer
1956 int CmdHpf(const char *Cmd)
1957 {
1958 int i;
1959 int accum = 0;
1960
1961 for (i = 10; i < GraphTraceLen; ++i)
1962 accum += GraphBuffer[i];
1963 accum /= (GraphTraceLen - 10);
1964 for (i = 0; i < GraphTraceLen; ++i)
1965 GraphBuffer[i] -= accum;
1966
1967 RepaintGraphWindow();
1968 return 0;
1969 }
1970
1971 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1972 {
1973 int i;
1974 uint8_t val = 0;
1975 for(i =0 ; i < bits_per_sample; i++)
1976 {
1977 val |= (headBit(b) << (7-i));
1978 }
1979 return val;
1980 }
1981
1982 int getSamples(const char *Cmd, bool silent)
1983 {
1984 //If we get all but the last byte in bigbuf,
1985 // we don't have to worry about remaining trash
1986 // in the last byte in case the bits-per-sample
1987 // does not line up on byte boundaries
1988
1989 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1990
1991 int n = strtol(Cmd, NULL, 0);
1992
1993 if (n == 0 || n > sizeof(got))
1994 n = sizeof(got);
1995
1996 PrintAndLog("Reading %d bytes from device memory\n", n);
1997 GetFromBigBuf(got,n,0);
1998 PrintAndLog("Data fetched");
1999 UsbCommand response;
2000 WaitForResponse(CMD_ACK, &response);
2001 uint8_t bits_per_sample = 8;
2002
2003 //Old devices without this feature would send 0 at arg[0]
2004 if(response.arg[0] > 0)
2005 {
2006 sample_config *sc = (sample_config *) response.d.asBytes;
2007 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
2008 , sc->decimation);
2009 bits_per_sample = sc->bits_per_sample;
2010 }
2011 if(bits_per_sample < 8)
2012 {
2013 PrintAndLog("Unpacking...");
2014 BitstreamIn bout = { got, bits_per_sample * n, 0};
2015 int j =0;
2016 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
2017 uint8_t sample = getByte(bits_per_sample, &bout);
2018 GraphBuffer[j] = ((int) sample )- 128;
2019 }
2020 GraphTraceLen = j;
2021 PrintAndLog("Unpacked %d samples" , j );
2022 }else
2023 {
2024 for (int j = 0; j < n; j++) {
2025 GraphBuffer[j] = ((int)got[j]) - 128;
2026 }
2027 GraphTraceLen = n;
2028 }
2029
2030 RepaintGraphWindow();
2031 return 0;
2032 }
2033
2034 int CmdSamples(const char *Cmd)
2035 {
2036 return getSamples(Cmd, false);
2037 }
2038
2039 int CmdTuneSamples(const char *Cmd)
2040 {
2041 int timeout = 0;
2042 printf("\nMeasuring antenna characteristics, please wait...");
2043
2044 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING};
2045 SendCommand(&c);
2046
2047 UsbCommand resp;
2048 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
2049 timeout++;
2050 printf(".");
2051 if (timeout > 7) {
2052 PrintAndLog("\nNo response from Proxmark. Aborting...");
2053 return 1;
2054 }
2055 }
2056
2057 int peakv, peakf;
2058 int vLf125, vLf134, vHf;
2059 vLf125 = resp.arg[0] & 0xffff;
2060 vLf134 = resp.arg[0] >> 16;
2061 vHf = resp.arg[1] & 0xffff;;
2062 peakf = resp.arg[2] & 0xffff;
2063 peakv = resp.arg[2] >> 16;
2064 PrintAndLog("");
2065 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
2066 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
2067 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
2068 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
2069
2070 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
2071 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
2072 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2073 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2074
2075 if (peakv < LF_UNUSABLE_V)
2076 PrintAndLog("# Your LF antenna is unusable.");
2077 else if (peakv < LF_MARGINAL_V)
2078 PrintAndLog("# Your LF antenna is marginal.");
2079 if (vHf < HF_UNUSABLE_V)
2080 PrintAndLog("# Your HF antenna is unusable.");
2081 else if (vHf < HF_MARGINAL_V)
2082 PrintAndLog("# Your HF antenna is marginal.");
2083
2084 if (peakv >= LF_UNUSABLE_V) {
2085 for (int i = 0; i < 256; i++) {
2086 GraphBuffer[i] = resp.d.asBytes[i] - 128;
2087 }
2088 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
2089 PrintAndLog("\n");
2090 GraphTraceLen = 256;
2091 ShowGraphWindow();
2092 RepaintGraphWindow();
2093 }
2094
2095 return 0;
2096 }
2097
2098
2099 int CmdLoad(const char *Cmd)
2100 {
2101 char filename[FILE_PATH_SIZE] = {0x00};
2102 int len = 0;
2103
2104 len = strlen(Cmd);
2105 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2106 memcpy(filename, Cmd, len);
2107
2108 FILE *f = fopen(filename, "r");
2109 if (!f) {
2110 PrintAndLog("couldn't open '%s'", filename);
2111 return 0;
2112 }
2113
2114 GraphTraceLen = 0;
2115 char line[80];
2116 while (fgets(line, sizeof (line), f)) {
2117 GraphBuffer[GraphTraceLen] = atoi(line);
2118 GraphTraceLen++;
2119 }
2120 fclose(f);
2121 PrintAndLog("loaded %d samples", GraphTraceLen);
2122 RepaintGraphWindow();
2123 return 0;
2124 }
2125
2126 int CmdLtrim(const char *Cmd)
2127 {
2128 int ds = atoi(Cmd);
2129 if (GraphTraceLen<=0) return 0;
2130 for (int i = ds; i < GraphTraceLen; ++i)
2131 GraphBuffer[i-ds] = GraphBuffer[i];
2132 GraphTraceLen -= ds;
2133
2134 RepaintGraphWindow();
2135 return 0;
2136 }
2137
2138 // trim graph to input argument length
2139 int CmdRtrim(const char *Cmd)
2140 {
2141 int ds = atoi(Cmd);
2142
2143 GraphTraceLen = ds;
2144
2145 RepaintGraphWindow();
2146 return 0;
2147 }
2148
2149 int CmdNorm(const char *Cmd)
2150 {
2151 int i;
2152 int max = INT_MIN, min = INT_MAX;
2153
2154 for (i = 10; i < GraphTraceLen; ++i) {
2155 if (GraphBuffer[i] > max)
2156 max = GraphBuffer[i];
2157 if (GraphBuffer[i] < min)
2158 min = GraphBuffer[i];
2159 }
2160
2161 if (max != min) {
2162 for (i = 0; i < GraphTraceLen; ++i) {
2163 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
2164 (max - min);
2165 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
2166 }
2167 }
2168 RepaintGraphWindow();
2169 return 0;
2170 }
2171
2172 int CmdPlot(const char *Cmd)
2173 {
2174 ShowGraphWindow();
2175 return 0;
2176 }
2177
2178 int CmdSave(const char *Cmd)
2179 {
2180 char filename[FILE_PATH_SIZE] = {0x00};
2181 int len = 0;
2182
2183 len = strlen(Cmd);
2184 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2185 memcpy(filename, Cmd, len);
2186
2187
2188 FILE *f = fopen(filename, "w");
2189 if(!f) {
2190 PrintAndLog("couldn't open '%s'", filename);
2191 return 0;
2192 }
2193 int i;
2194 for (i = 0; i < GraphTraceLen; i++) {
2195 fprintf(f, "%d\n", GraphBuffer[i]);
2196 }
2197 fclose(f);
2198 PrintAndLog("saved to '%s'", Cmd);
2199 return 0;
2200 }
2201
2202 int CmdScale(const char *Cmd)
2203 {
2204 CursorScaleFactor = atoi(Cmd);
2205 if (CursorScaleFactor == 0) {
2206 PrintAndLog("bad, can't have zero scale");
2207 CursorScaleFactor = 1;
2208 }
2209 RepaintGraphWindow();
2210 return 0;
2211 }
2212
2213 int CmdDirectionalThreshold(const char *Cmd)
2214 {
2215 int8_t upThres = param_get8(Cmd, 0);
2216 int8_t downThres = param_get8(Cmd, 1);
2217
2218 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
2219
2220 int lastValue = GraphBuffer[0];
2221 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
2222
2223 for (int i = 1; i < GraphTraceLen; ++i) {
2224 // Apply first threshold to samples heading up
2225 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2226 {
2227 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2228 GraphBuffer[i] = 1;
2229 }
2230 // Apply second threshold to samples heading down
2231 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2232 {
2233 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2234 GraphBuffer[i] = -1;
2235 }
2236 else
2237 {
2238 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2239 GraphBuffer[i] = GraphBuffer[i-1];
2240
2241 }
2242 }
2243 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2244 RepaintGraphWindow();
2245 return 0;
2246 }
2247
2248 int CmdZerocrossings(const char *Cmd)
2249 {
2250 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2251 CmdHpf("");
2252
2253 int sign = 1;
2254 int zc = 0;
2255 int lastZc = 0;
2256
2257 for (int i = 0; i < GraphTraceLen; ++i) {
2258 if (GraphBuffer[i] * sign >= 0) {
2259 // No change in sign, reproduce the previous sample count.
2260 zc++;
2261 GraphBuffer[i] = lastZc;
2262 } else {
2263 // Change in sign, reset the sample count.
2264 sign = -sign;
2265 GraphBuffer[i] = lastZc;
2266 if (sign > 0) {
2267 lastZc = zc;
2268 zc = 0;
2269 }
2270 }
2271 }
2272
2273 RepaintGraphWindow();
2274 return 0;
2275 }
2276
2277 int usage_data_bin2hex(){
2278 PrintAndLog("Usage: data bin2hex <binary_digits>");
2279 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
2280 return 0;
2281 }
2282
2283 /**
2284 * @brief Utility for conversion via cmdline.
2285 * @param Cmd
2286 * @return
2287 */
2288 int Cmdbin2hex(const char *Cmd)
2289 {
2290 int bg =0, en =0;
2291 if(param_getptr(Cmd, &bg, &en, 0))
2292 {
2293 return usage_data_bin2hex();
2294 }
2295 //Number of digits supplied as argument
2296 size_t length = en - bg +1;
2297 size_t bytelen = (length+7) / 8;
2298 uint8_t* arr = (uint8_t *) malloc(bytelen);
2299 memset(arr, 0, bytelen);
2300 BitstreamOut bout = { arr, 0, 0 };
2301
2302 for(; bg <= en ;bg++)
2303 {
2304 char c = Cmd[bg];
2305 if( c == '1') pushBit(&bout, 1);
2306 else if( c == '0') pushBit(&bout, 0);
2307 else PrintAndLog("Ignoring '%c'", c);
2308 }
2309
2310 if(bout.numbits % 8 != 0)
2311 {
2312 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
2313 }
2314
2315 //Uses printf instead of PrintAndLog since the latter
2316 // adds linebreaks to each printout - this way was more convenient since we don't have to
2317 // allocate a string and write to that first...
2318 for(size_t x = 0; x < bytelen ; x++)
2319 {
2320 printf("%02X", arr[x]);
2321 }
2322 printf("\n");
2323 free(arr);
2324 return 0;
2325 }
2326
2327 int usage_data_hex2bin() {
2328 PrintAndLog("Usage: data hex2bin <hex_digits>");
2329 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
2330 return 0;
2331
2332 }
2333
2334 int Cmdhex2bin(const char *Cmd)
2335 {
2336 int bg =0, en =0;
2337 if(param_getptr(Cmd, &bg, &en, 0))
2338 {
2339 return usage_data_hex2bin();
2340 }
2341
2342
2343 while(bg <= en )
2344 {
2345 char x = Cmd[bg++];
2346 // capitalize
2347 if (x >= 'a' && x <= 'f')
2348 x -= 32;
2349 // convert to numeric value
2350 if (x >= '0' && x <= '9')
2351 x -= '0';
2352 else if (x >= 'A' && x <= 'F')
2353 x -= 'A' - 10;
2354 else
2355 continue;
2356
2357 //Uses printf instead of PrintAndLog since the latter
2358 // adds linebreaks to each printout - this way was more convenient since we don't have to
2359 // allocate a string and write to that first...
2360
2361 for(int i= 0 ; i < 4 ; ++i)
2362 printf("%d",(x >> (3 - i)) & 1);
2363 }
2364 printf("\n");
2365
2366 return 0;
2367 }
2368
2369 static command_t CommandTable[] =
2370 {
2371 {"help", CmdHelp, 1, "This help"},
2372 {"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)"},
2373 {"askem410xdemod", CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
2374 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
2375 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking tag from GraphBuffer"},
2376 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
2377 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
2378 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
2379 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
2380 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2381 {"dec", CmdDec, 1, "Decimate samples"},
2382 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
2383 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
2384 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
2385 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
2386 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2387 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2388 {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2389 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
2390 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
2391 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
2392 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
2393 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
2394 {"hide", CmdHide, 1, "Hide graph window"},
2395 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
2396 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2397 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
2398 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
2399 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
2400 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
2401 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
2402 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
2403 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
2404 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
2405 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2406 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
2407 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2408 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
2409 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
2410 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
2411 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2412 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
2413 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
2414 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
2415 {NULL, NULL, 0, NULL}
2416 };
2417
2418 int CmdData(const char *Cmd)
2419 {
2420 CmdsParse(CommandTable, Cmd);
2421 return 0;
2422 }
2423
2424 int CmdHelp(const char *Cmd)
2425 {
2426 CmdsHelp(CommandTable);
2427 return 0;
2428 }
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