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1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
3 //
4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
5 // at your option, any later version. See the LICENSE.txt file for the text of
6 // the license.
7 //-----------------------------------------------------------------------------
8 // Data and Graph commands
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h> // also included in util.h
12 #include <string.h> // also included in util.h
13 #include <inttypes.h>
14 #include <limits.h> // for CmdNorm INT_MIN && INT_MAX
15 #include "data.h" // also included in util.h
16 #include "cmddata.h"
17 #include "util.h"
18 #include "cmdmain.h"
19 #include "proxmark3.h"
20 #include "ui.h" // for show graph controls
21 #include "graph.h" // for graph data
22 #include "cmdparser.h"// already included in cmdmain.h
23 #include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
24 #include "lfdemod.h" // for demod code
25 #include "crc.h" // for pyramid checksum maxim
26 #include "crc16.h" // for FDXB demod checksum
27 #include "loclass/cipherutils.h" // for decimating samples in getsamples
28
29 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
30 uint8_t g_debugMode=0;
31 size_t DemodBufferLen=0;
32 static int CmdHelp(const char *Cmd);
33
34 //set the demod buffer with given array of binary (one bit per byte)
35 //by marshmellow
36 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
37 {
38 if (buff == NULL)
39 return;
40
41 if ( size >= MAX_DEMOD_BUF_LEN)
42 size = MAX_DEMOD_BUF_LEN;
43
44 size_t i = 0;
45 for (; i < size; i++){
46 DemodBuffer[i]=buff[startIdx++];
47 }
48 DemodBufferLen=size;
49 return;
50 }
51
52 int CmdSetDebugMode(const char *Cmd)
53 {
54 int demod=0;
55 sscanf(Cmd, "%i", &demod);
56 g_debugMode=(uint8_t)demod;
57 return 1;
58 }
59
60 int usage_data_printdemodbuf(){
61 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
62 PrintAndLog("Options: ");
63 PrintAndLog(" h This help");
64 PrintAndLog(" x output in hex (omit for binary output)");
65 PrintAndLog(" o <offset> enter offset in # of bits");
66 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
67 return 0;
68 }
69
70 //by marshmellow
71 void printDemodBuff(void)
72 {
73 int bitLen = DemodBufferLen;
74 if (bitLen<1) {
75 PrintAndLog("no bits found in demod buffer");
76 return;
77 }
78 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
79
80 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
81 PrintAndLog("%s",bin);
82
83 return;
84 }
85
86 int CmdPrintDemodBuff(const char *Cmd)
87 {
88 char hex[512]={0x00};
89 bool hexMode = false;
90 bool errors = false;
91 uint32_t offset = 0; //could be size_t but no param_get16...
92 uint32_t length = 512;
93 char cmdp = 0;
94 while(param_getchar(Cmd, cmdp) != 0x00)
95 {
96 switch(param_getchar(Cmd, cmdp))
97 {
98 case 'h':
99 case 'H':
100 return usage_data_printdemodbuf();
101 case 'x':
102 case 'X':
103 hexMode = true;
104 cmdp++;
105 break;
106 case 'o':
107 case 'O':
108 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
109 if (!offset) errors = true;
110 cmdp += 2;
111 break;
112 case 'l':
113 case 'L':
114 length = param_get32ex(Cmd, cmdp+1, 512, 10);
115 if (!length) errors = true;
116 cmdp += 2;
117 break;
118 default:
119 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
120 errors = true;
121 break;
122 }
123 if(errors) break;
124 }
125 //Validations
126 if(errors) return usage_data_printdemodbuf();
127 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
128 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
129
130 if (hexMode){
131 char *buf = (char *) (DemodBuffer + offset);
132 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
133 numBits = binarraytohex(hex, buf, numBits);
134 if (numBits==0) return 0;
135 PrintAndLog("DemodBuffer: %s",hex);
136 } else {
137 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
138 }
139 return 1;
140 }
141
142 //by marshmellow
143 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
144 int CmdGetBitStream(const char *Cmd)
145 {
146 int i;
147 CmdHpf(Cmd);
148 for (i = 0; i < GraphTraceLen; i++) {
149 if (GraphBuffer[i] >= 1) {
150 GraphBuffer[i] = 1;
151 } else {
152 GraphBuffer[i] = 0;
153 }
154 }
155 RepaintGraphWindow();
156 return 0;
157 }
158
159 //by marshmellow
160 //print 64 bit EM410x ID in multiple formats
161 void printEM410x(uint32_t hi, uint64_t id)
162 {
163 if (id || hi){
164 uint64_t iii=1;
165 uint64_t id2lo=0;
166 uint32_t ii=0;
167 uint32_t i=0;
168 for (ii=5; ii>0;ii--){
169 for (i=0;i<8;i++){
170 id2lo=(id2lo<<1LL) | ((id & (iii << (i+((ii-1)*8)))) >> (i+((ii-1)*8)));
171 }
172 }
173 if (hi){
174 //output 88 bit em id
175 PrintAndLog("\nEM TAG ID : %06X%016" PRIX64, hi, id);
176 } else{
177 //output 40 bit em id
178 PrintAndLog("\nEM TAG ID : %010" PRIX64, id);
179 PrintAndLog("\nPossible de-scramble patterns");
180 PrintAndLog("Unique TAG ID : %010" PRIX64, id2lo);
181 PrintAndLog("HoneyWell IdentKey {");
182 PrintAndLog("DEZ 8 : %08" PRIu64,id & 0xFFFFFF);
183 PrintAndLog("DEZ 10 : %010" PRIu64,id & 0xFFFFFFFF);
184 PrintAndLog("DEZ 5.5 : %05lld.%05" PRIu64,(id>>16LL) & 0xFFFF,(id & 0xFFFF));
185 PrintAndLog("DEZ 3.5A : %03lld.%05" PRIu64,(id>>32ll),(id & 0xFFFF));
186 PrintAndLog("DEZ 3.5B : %03lld.%05" PRIu64,(id & 0xFF000000) >> 24,(id & 0xFFFF));
187 PrintAndLog("DEZ 3.5C : %03lld.%05" PRIu64,(id & 0xFF0000) >> 16,(id & 0xFFFF));
188 PrintAndLog("DEZ 14/IK2 : %014" PRIu64,id);
189 PrintAndLog("DEZ 15/IK3 : %015" PRIu64,id2lo);
190 PrintAndLog("DEZ 20/ZK : %02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64,
191 (id2lo & 0xf000000000) >> 36,
192 (id2lo & 0x0f00000000) >> 32,
193 (id2lo & 0x00f0000000) >> 28,
194 (id2lo & 0x000f000000) >> 24,
195 (id2lo & 0x0000f00000) >> 20,
196 (id2lo & 0x00000f0000) >> 16,
197 (id2lo & 0x000000f000) >> 12,
198 (id2lo & 0x0000000f00) >> 8,
199 (id2lo & 0x00000000f0) >> 4,
200 (id2lo & 0x000000000f)
201 );
202 uint64_t paxton = (((id>>32) << 24) | (id & 0xffffff)) + 0x143e00;
203 PrintAndLog("}\nOther : %05" PRIu64 "_%03" PRIu64 "_%08" PRIu64 "",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
204 PrintAndLog("Pattern Paxton : %" PRIu64 " [0x%" PRIX64 "]", paxton, paxton);
205
206 uint32_t p1id = (id & 0xFFFFFF);
207 uint8_t arr[32] = {0x00};
208 int i =0;
209 int j = 23;
210 for (; i < 24; ++i, --j ){
211 arr[i] = (p1id >> i) & 1;
212 }
213
214 uint32_t p1 = 0;
215
216 p1 |= arr[23] << 21;
217 p1 |= arr[22] << 23;
218 p1 |= arr[21] << 20;
219 p1 |= arr[20] << 22;
220
221 p1 |= arr[19] << 18;
222 p1 |= arr[18] << 16;
223 p1 |= arr[17] << 19;
224 p1 |= arr[16] << 17;
225
226 p1 |= arr[15] << 13;
227 p1 |= arr[14] << 15;
228 p1 |= arr[13] << 12;
229 p1 |= arr[12] << 14;
230
231 p1 |= arr[11] << 6;
232 p1 |= arr[10] << 2;
233 p1 |= arr[9] << 7;
234 p1 |= arr[8] << 1;
235
236 p1 |= arr[7] << 0;
237 p1 |= arr[6] << 8;
238 p1 |= arr[5] << 11;
239 p1 |= arr[4] << 3;
240
241 p1 |= arr[3] << 10;
242 p1 |= arr[2] << 4;
243 p1 |= arr[1] << 5;
244 p1 |= arr[0] << 9;
245 PrintAndLog("Pattern 1 : %d [0x%X]", p1, p1);
246
247 uint16_t sebury1 = id & 0xFFFF;
248 uint8_t sebury2 = (id >> 16) & 0x7F;
249 uint32_t sebury3 = id & 0x7FFFFF;
250 PrintAndLog("Pattern Sebury : %d %d %d [0x%X 0x%X 0x%X]", sebury1, sebury2, sebury3, sebury1, sebury2, sebury3);
251 }
252 }
253 return;
254 }
255
256 int AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )
257 {
258 size_t idx = 0;
259 size_t BitLen = DemodBufferLen;
260 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
261 memcpy(BitStream, DemodBuffer, BitLen);
262 if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)){
263 //set GraphBuffer for clone or sim command
264 setDemodBuf(BitStream, BitLen, idx);
265 if (g_debugMode){
266 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
267 printDemodBuff();
268 }
269 if (verbose){
270 PrintAndLog("EM410x pattern found: ");
271 printEM410x(*hi, *lo);
272 }
273 return 1;
274 }
275 return 0;
276 }
277
278 int AskEm410xDemod(const char *Cmd, uint32_t *hi, uint64_t *lo, bool verbose)
279 {
280 bool st = TRUE;
281 if (!ASKDemod_ext(Cmd, FALSE, FALSE, 1, &st)) return 0;
282 return AskEm410xDecode(verbose, hi, lo);
283 }
284
285 //by marshmellow
286 //takes 3 arguments - clock, invert and maxErr as integers
287 //attempts to demodulate ask while decoding manchester
288 //prints binary found and saves in graphbuffer for further commands
289 int CmdAskEM410xDemod(const char *Cmd)
290 {
291 char cmdp = param_getchar(Cmd, 0);
292 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
293 PrintAndLog("Usage: data askem410xdemod [clock] <0|1> [maxError]");
294 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
295 PrintAndLog(" <invert>, 1 for invert output");
296 PrintAndLog(" [set maximum allowed errors], default = 100.");
297 PrintAndLog("");
298 PrintAndLog(" sample: data askem410xdemod = demod an EM410x Tag ID from GraphBuffer");
299 PrintAndLog(" : data askem410xdemod 32 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32");
300 PrintAndLog(" : data askem410xdemod 32 1 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32 and inverting data");
301 PrintAndLog(" : data askem410xdemod 1 = demod an EM410x Tag ID from GraphBuffer while inverting data");
302 PrintAndLog(" : data askem410xdemod 64 1 0 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/64 and inverting data and allowing 0 demod errors");
303 return 0;
304 }
305 uint64_t lo = 0;
306 uint32_t hi = 0;
307 return AskEm410xDemod(Cmd, &hi, &lo, true);
308 }
309
310 //by marshmellow
311 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
312 // (amp may not be needed anymore)
313 //verbose will print results and demoding messages
314 //emSearch will auto search for EM410x format in bitstream
315 //askType switches decode: ask/raw = 0, ask/manchester = 1
316 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
317 int invert=0;
318 int clk=0;
319 int maxErr=100;
320 int maxLen=0;
321 uint8_t askamp = 0;
322 char amp = param_getchar(Cmd, 0);
323 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
324 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
325 if (!maxLen) maxLen = BIGBUF_SIZE;
326 if (invert != 0 && invert != 1) {
327 PrintAndLog("Invalid argument: %s", Cmd);
328 return 0;
329 }
330 if (clk==1){
331 invert=1;
332 clk=0;
333 }
334 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 //amp before ST check
340 if (amp == 'a' || amp == 'A') {
341 askAmp(BitStream, BitLen);
342 }
343 bool st = false;
344 if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk);
345 if (st) {
346 *stCheck = st;
347 clk = (clk == 0) ? foundclk : clk;
348 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator");
349 }
350 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);
351 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
352 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
353 return 0;
354 }
355 if (errCnt > maxErr){
356 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
357 return 0;
358 }
359 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
360
361 //output
362 setDemodBuf(BitStream,BitLen,0);
363 if (verbose || g_debugMode){
364 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
365 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
366 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
367 // Now output the bitstream to the scrollback by line of 16 bits
368 printDemodBuff();
369
370 }
371 uint64_t lo = 0;
372 uint32_t hi = 0;
373 if (emSearch){
374 AskEm410xDecode(true, &hi, &lo);
375 }
376 return 1;
377 }
378 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
379 bool st = false;
380 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
381 }
382
383 //by marshmellow
384 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
385 //attempts to demodulate ask while decoding manchester
386 //prints binary found and saves in graphbuffer for further commands
387 int Cmdaskmandemod(const char *Cmd)
388 {
389 char cmdp = param_getchar(Cmd, 0);
390 if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
391 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
392 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
393 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
394 PrintAndLog(" <invert>, 1 to invert output");
395 PrintAndLog(" [set maximum allowed errors], default = 100");
396 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
397 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
398 PrintAndLog("");
399 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
400 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
401 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
402 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
403 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");
404 return 0;
405 }
406 bool st = TRUE;
407 if (Cmd[0]=='s')
408 return ASKDemod_ext(Cmd++, TRUE, TRUE, 1, &st);
409 else if (Cmd[1] == 's')
410 return ASKDemod_ext(Cmd+=2, TRUE, TRUE, 1, &st);
411 else
412 return ASKDemod(Cmd, TRUE, TRUE, 1);
413 }
414
415 //by marshmellow
416 //manchester decode
417 //stricktly take 10 and 01 and convert to 0 and 1
418 int Cmdmandecoderaw(const char *Cmd)
419 {
420 int i =0;
421 int errCnt=0;
422 size_t size=0;
423 int invert=0;
424 int maxErr = 20;
425 char cmdp = param_getchar(Cmd, 0);
426 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
427 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
428 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
429 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
430 PrintAndLog(" [invert] invert output");
431 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
432 PrintAndLog("");
433 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
434 return 0;
435 }
436 if (DemodBufferLen==0) return 0;
437 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
438 int high=0,low=0;
439 for (;i<DemodBufferLen;++i){
440 if (DemodBuffer[i]>high) high=DemodBuffer[i];
441 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
442 BitStream[i]=DemodBuffer[i];
443 }
444 if (high>7 || low <0 ){
445 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
446 return 0;
447 }
448
449 sscanf(Cmd, "%i %i", &invert, &maxErr);
450 size=i;
451 errCnt=manrawdecode(BitStream, &size, invert);
452 if (errCnt>=maxErr){
453 PrintAndLog("Too many errors: %d",errCnt);
454 return 0;
455 }
456 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
457 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
458 if (errCnt==0){
459 uint64_t id = 0;
460 uint32_t hi = 0;
461 size_t idx=0;
462 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
463 //need to adjust to set bitstream back to manchester encoded data
464 //setDemodBuf(BitStream, size, idx);
465
466 printEM410x(hi, id);
467 }
468 }
469 return 1;
470 }
471
472 //by marshmellow
473 //biphase decode
474 //take 01 or 10 = 0 and 11 or 00 = 1
475 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
476 // and "invert" default = 0 if 1 it will invert output
477 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
478 int CmdBiphaseDecodeRaw(const char *Cmd)
479 {
480 size_t size=0;
481 int offset=0, invert=0, maxErr=20, errCnt=0;
482 char cmdp = param_getchar(Cmd, 0);
483 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
484 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
485 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
486 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
487 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
488 PrintAndLog("");
489 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
490 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
491 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
492 PrintAndLog("");
493 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
494 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
495 return 0;
496 }
497 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
498 if (DemodBufferLen==0){
499 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
500 return 0;
501 }
502 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
503 memcpy(BitStream, DemodBuffer, DemodBufferLen);
504 size = DemodBufferLen;
505 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
506 if (errCnt<0){
507 PrintAndLog("Error during decode:%d", errCnt);
508 return 0;
509 }
510 if (errCnt>maxErr){
511 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
512 return 0;
513 }
514
515 if (errCnt>0){
516 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
517 }
518 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
519 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
520
521 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
522 return 1;
523 }
524
525 //by marshmellow
526 // - ASK Demod then Biphase decode GraphBuffer samples
527 int ASKbiphaseDemod(const char *Cmd, bool verbose)
528 {
529 //ask raw demod GraphBuffer first
530 int offset=0, clk=0, invert=0, maxErr=0;
531 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
532
533 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
534 size_t size = getFromGraphBuf(BitStream);
535 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
536 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
537 if ( errCnt < 0 || errCnt > maxErr ) {
538 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
539 return 0;
540 }
541
542 //attempt to Biphase decode BitStream
543 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
544 if (errCnt < 0){
545 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
546 return 0;
547 }
548 if (errCnt > maxErr) {
549 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
550 return 0;
551 }
552 //success set DemodBuffer and return
553 setDemodBuf(BitStream, size, 0);
554 if (g_debugMode || verbose){
555 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
556 printDemodBuff();
557 }
558 return 1;
559 }
560 //by marshmellow - see ASKbiphaseDemod
561 int Cmdaskbiphdemod(const char *Cmd)
562 {
563 char cmdp = param_getchar(Cmd, 0);
564 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
565 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
566 PrintAndLog(" [offset], offset to begin biphase, default=0");
567 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
568 PrintAndLog(" <invert>, 1 to invert output");
569 PrintAndLog(" [set maximum allowed errors], default = 100");
570 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
571 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
572 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
573 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
574 PrintAndLog(" NOTE: any other arg must have previous args set to work");
575 PrintAndLog("");
576 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
577 PrintAndLog("");
578 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
579 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
580 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
581 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
582 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
583 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");
584 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");
585 return 0;
586 }
587 return ASKbiphaseDemod(Cmd, TRUE);
588 }
589
590 //by marshmellow
591 //attempts to demodulate and identify a G_Prox_II verex/chubb card
592 //WARNING: if it fails during some points it will destroy the DemodBuffer data
593 // but will leave the GraphBuffer intact.
594 //if successful it will push askraw data back to demod buffer ready for emulation
595 int CmdG_Prox_II_Demod(const char *Cmd)
596 {
597 if (!ASKbiphaseDemod(Cmd, FALSE)){
598 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
599 return 0;
600 }
601 size_t size = DemodBufferLen;
602 //call lfdemod.c demod for gProxII
603 int ans = gProxII_Demod(DemodBuffer, &size);
604 if (ans < 0){
605 if (g_debugMode) PrintAndLog("Error gProxII_Demod");
606 return 0;
607 }
608 //got a good demod of 96 bits
609 uint8_t ByteStream[8] = {0x00};
610 uint8_t xorKey=0;
611 size_t startIdx = ans + 6; //start after 6 bit preamble
612
613 uint8_t bits_no_spacer[90];
614 //so as to not mess with raw DemodBuffer copy to a new sample array
615 memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
616 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
617 size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
618 if (bitLen != 72) {
619 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
620 return 0;
621 }
622 // get key and then get all 8 bytes of payload decoded
623 xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
624 for (size_t idx = 0; idx < 8; idx++) {
625 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
626 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
627 }
628 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
629 //
630 uint8_t fmtLen = ByteStream[0]>>2;
631 uint32_t FC = 0;
632 uint32_t Card = 0;
633 //get raw 96 bits to print
634 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
635 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
636 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
637
638 if (fmtLen==36){
639 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
640 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
641 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
642 } else if(fmtLen==26){
643 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
644 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
645 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
646 } else {
647 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
648 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
649 }
650 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
651 setDemodBuf(DemodBuffer+ans, 96, 0);
652 return 1;
653 }
654
655 //by marshmellow
656 //see ASKDemod for what args are accepted
657 int CmdVikingDemod(const char *Cmd)
658 {
659 if (!ASKDemod(Cmd, false, false, 1)) {
660 if (g_debugMode) PrintAndLog("ASKDemod failed");
661 return 0;
662 }
663 size_t size = DemodBufferLen;
664 //call lfdemod.c demod for Viking
665 int ans = VikingDemod_AM(DemodBuffer, &size);
666 if (ans < 0) {
667 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
668 return 0;
669 }
670 //got a good demod
671 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
672 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
673 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
674 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
675 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);
676 PrintAndLog("Raw: %08X%08X", raw1,raw2);
677 setDemodBuf(DemodBuffer+ans, 64, 0);
678 return 1;
679 }
680
681 //by marshmellow - see ASKDemod
682 int Cmdaskrawdemod(const char *Cmd)
683 {
684 char cmdp = param_getchar(Cmd, 0);
685 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
686 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
687 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
688 PrintAndLog(" <invert>, 1 to invert output");
689 PrintAndLog(" [set maximum allowed errors], default = 100");
690 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
691 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
692 PrintAndLog("");
693 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
694 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
695 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
696 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
697 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
698 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");
699 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");
700 return 0;
701 }
702 return ASKDemod(Cmd, TRUE, FALSE, 0);
703 }
704
705 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
706 {
707 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
708 size_t Correlation = 0;
709 int maxSum = 0;
710 int lastMax = 0;
711 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
712 for (int i = 0; i < GraphTraceLen - window; ++i) {
713 int sum = 0;
714 for (int j = 0; j < window; ++j) {
715 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
716 }
717 CorrelBuffer[i] = sum;
718 if (sum >= maxSum-100 && sum <= maxSum+100){
719 //another max
720 Correlation = i-lastMax;
721 lastMax = i;
722 if (sum > maxSum) maxSum = sum;
723 } else if (sum > maxSum){
724 maxSum=sum;
725 lastMax = i;
726 }
727 }
728 if (Correlation==0){
729 //try again with wider margin
730 for (int i = 0; i < GraphTraceLen - window; i++){
731 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
732 //another max
733 Correlation = i-lastMax;
734 lastMax = i;
735 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
736 }
737 }
738 }
739 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
740
741 if (SaveGrph){
742 GraphTraceLen = GraphTraceLen - window;
743 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
744 RepaintGraphWindow();
745 }
746 return Correlation;
747 }
748
749 int usage_data_autocorr(void)
750 {
751 //print help
752 PrintAndLog("Usage: data autocorr [window] [g]");
753 PrintAndLog("Options: ");
754 PrintAndLog(" h This help");
755 PrintAndLog(" [window] window length for correlation - default = 4000");
756 PrintAndLog(" g save back to GraphBuffer (overwrite)");
757 return 0;
758 }
759
760 int CmdAutoCorr(const char *Cmd)
761 {
762 char cmdp = param_getchar(Cmd, 0);
763 if (cmdp == 'h' || cmdp == 'H')
764 return usage_data_autocorr();
765 int window = 4000; //set default
766 char grph=0;
767 bool updateGrph = FALSE;
768 sscanf(Cmd, "%i %c", &window, &grph);
769
770 if (window >= GraphTraceLen) {
771 PrintAndLog("window must be smaller than trace (%d samples)",
772 GraphTraceLen);
773 return 0;
774 }
775 if (grph == 'g') updateGrph=TRUE;
776 return AutoCorrelate(window, updateGrph, TRUE);
777 }
778
779 int CmdBitsamples(const char *Cmd)
780 {
781 int cnt = 0;
782 uint8_t got[12288];
783
784 GetFromBigBuf(got,sizeof(got),0);
785 WaitForResponse(CMD_ACK,NULL);
786
787 for (int j = 0; j < sizeof(got); j++) {
788 for (int k = 0; k < 8; k++) {
789 if(got[j] & (1 << (7 - k))) {
790 GraphBuffer[cnt++] = 1;
791 } else {
792 GraphBuffer[cnt++] = 0;
793 }
794 }
795 }
796 GraphTraceLen = cnt;
797 RepaintGraphWindow();
798 return 0;
799 }
800
801 int CmdBuffClear(const char *Cmd)
802 {
803 UsbCommand c = {CMD_BUFF_CLEAR};
804 SendCommand(&c);
805 ClearGraph(true);
806 return 0;
807 }
808
809 int CmdDec(const char *Cmd)
810 {
811 for (int i = 0; i < (GraphTraceLen / 2); ++i)
812 GraphBuffer[i] = GraphBuffer[i * 2];
813 GraphTraceLen /= 2;
814 PrintAndLog("decimated by 2");
815 RepaintGraphWindow();
816 return 0;
817 }
818 /**
819 * Undecimate - I'd call it 'interpolate', but we'll save that
820 * name until someone does an actual interpolation command, not just
821 * blindly repeating samples
822 * @param Cmd
823 * @return
824 */
825 int CmdUndec(const char *Cmd)
826 {
827 if(param_getchar(Cmd, 0) == 'h')
828 {
829 PrintAndLog("Usage: data undec [factor]");
830 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
831 PrintAndLog("Options: ");
832 PrintAndLog(" h This help");
833 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
834 PrintAndLog("Example: 'data undec 3'");
835 return 0;
836 }
837
838 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
839 //We have memory, don't we?
840 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
841 uint32_t g_index = 0, s_index = 0;
842 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
843 {
844 int count = 0;
845 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
846 swap[s_index+count] = GraphBuffer[g_index];
847
848 s_index += count;
849 g_index++;
850 }
851
852 memcpy(GraphBuffer, swap, s_index * sizeof(int));
853 GraphTraceLen = s_index;
854 RepaintGraphWindow();
855 return 0;
856 }
857
858 //by marshmellow
859 //shift graph zero up or down based on input + or -
860 int CmdGraphShiftZero(const char *Cmd)
861 {
862
863 int shift=0;
864 //set options from parameters entered with the command
865 sscanf(Cmd, "%i", &shift);
866 int shiftedVal=0;
867 for(int i = 0; i<GraphTraceLen; i++){
868 shiftedVal=GraphBuffer[i]+shift;
869 if (shiftedVal>127)
870 shiftedVal=127;
871 else if (shiftedVal<-127)
872 shiftedVal=-127;
873 GraphBuffer[i]= shiftedVal;
874 }
875 CmdNorm("");
876 return 0;
877 }
878
879 //by marshmellow
880 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
881 //similar to dirtheshold, threshold commands
882 //takes a threshold length which is the measured length between two samples then determines an edge
883 int CmdAskEdgeDetect(const char *Cmd)
884 {
885 int thresLen = 25;
886 int Last = 0;
887 sscanf(Cmd, "%i", &thresLen);
888
889 for(int i = 1; i<GraphTraceLen; i++){
890 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
891 Last = 127;
892 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
893 Last = -127;
894 GraphBuffer[i-1] = Last;
895 }
896 RepaintGraphWindow();
897 return 0;
898 }
899
900 /* Print our clock rate */
901 // uses data from graphbuffer
902 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
903 int CmdDetectClockRate(const char *Cmd)
904 {
905 char cmdp = param_getchar(Cmd, 0);
906 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
907 PrintAndLog("Usage: data detectclock [modulation] <clock>");
908 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
909 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
910 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
911 PrintAndLog("");
912 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
913 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
914 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
915 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
916 }
917 int ans=0;
918 if (cmdp == 'a'){
919 ans = GetAskClock(Cmd+1, true, false);
920 } else if (cmdp == 'f'){
921 ans = GetFskClock("", true, false);
922 } else if (cmdp == 'n'){
923 ans = GetNrzClock("", true, false);
924 } else if (cmdp == 'p'){
925 ans = GetPskClock("", true, false);
926 } else {
927 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
928 }
929 return ans;
930 }
931
932 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
933 {
934 static char fType[8];
935 memset(fType, 0x00, 8);
936 char *fskType = fType;
937 if (fchigh==10 && fclow==8){
938 if (invert) //fsk2a
939 memcpy(fskType, "FSK2a", 5);
940 else //fsk2
941 memcpy(fskType, "FSK2", 4);
942 } else if (fchigh == 8 && fclow == 5) {
943 if (invert)
944 memcpy(fskType, "FSK1", 4);
945 else
946 memcpy(fskType, "FSK1a", 5);
947 } else {
948 memcpy(fskType, "FSK??", 5);
949 }
950 return fskType;
951 }
952
953 //by marshmellow
954 //fsk raw demod and print binary
955 //takes 4 arguments - Clock, invert, fchigh, fclow
956 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
957 int FSKrawDemod(const char *Cmd, bool verbose)
958 {
959 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
960 uint8_t rfLen, invert, fchigh, fclow;
961 //set defaults
962 //set options from parameters entered with the command
963 rfLen = param_get8(Cmd, 0);
964 invert = param_get8(Cmd, 1);
965 fchigh = param_get8(Cmd, 2);
966 fclow = param_get8(Cmd, 3);
967
968 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
969 if (rfLen==1) {
970 invert = 1; //if invert option only is used
971 rfLen = 0;
972 }
973 }
974 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
975 size_t BitLen = getFromGraphBuf(BitStream);
976 if (BitLen==0) return 0;
977 //get field clock lengths
978 uint16_t fcs=0;
979 if (!fchigh || !fclow) {
980 fcs = countFC(BitStream, BitLen, 1);
981 if (!fcs) {
982 fchigh = 10;
983 fclow = 8;
984 } else {
985 fchigh = (fcs >> 8) & 0x00FF;
986 fclow = fcs & 0x00FF;
987 }
988 }
989 //get bit clock length
990 if (!rfLen) {
991 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
992 if (!rfLen) rfLen = 50;
993 }
994 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
995 if (size > 0) {
996 setDemodBuf(BitStream,size,0);
997
998 // Now output the bitstream to the scrollback by line of 16 bits
999 if (verbose || g_debugMode) {
1000 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
1001 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
1002 printDemodBuff();
1003 }
1004
1005 return 1;
1006 } else {
1007 if (g_debugMode) PrintAndLog("no FSK data found");
1008 }
1009 return 0;
1010 }
1011
1012 //by marshmellow
1013 //fsk raw demod and print binary
1014 //takes 4 arguments - Clock, invert, fchigh, fclow
1015 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
1016 int CmdFSKrawdemod(const char *Cmd)
1017 {
1018 char cmdp = param_getchar(Cmd, 0);
1019 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
1020 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
1021 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
1022 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
1023 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
1024 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
1025 PrintAndLog("");
1026 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
1027 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
1028 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
1029 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
1030 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
1031 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
1032 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
1033 return 0;
1034 }
1035 return FSKrawDemod(Cmd, TRUE);
1036 }
1037
1038 //by marshmellow (based on existing demod + holiman's refactor)
1039 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
1040 //print full HID Prox ID and some bit format details if found
1041 int CmdFSKdemodHID(const char *Cmd)
1042 {
1043 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1044 uint32_t hi2=0, hi=0, lo=0;
1045
1046 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1047 size_t BitLen = getFromGraphBuf(BitStream);
1048 if (BitLen==0) return 0;
1049 //get binary from fsk wave
1050 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1051 if (idx<0){
1052 if (g_debugMode){
1053 if (idx==-1){
1054 PrintAndLog("DEBUG: Just Noise Detected");
1055 } else if (idx == -2) {
1056 PrintAndLog("DEBUG: Error demoding fsk");
1057 } else if (idx == -3) {
1058 PrintAndLog("DEBUG: Preamble not found");
1059 } else if (idx == -4) {
1060 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
1061 } else {
1062 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1063 }
1064 }
1065 return 0;
1066 }
1067 if (hi2==0 && hi==0 && lo==0) {
1068 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
1069 return 0;
1070 }
1071 if (hi2 != 0){ //extra large HID tags
1072 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
1073 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
1074 }
1075 else { //standard HID tags <38 bits
1076 uint8_t fmtLen = 0;
1077 uint32_t fc = 0;
1078 uint32_t cardnum = 0;
1079 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
1080 uint32_t lo2=0;
1081 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
1082 uint8_t idx3 = 1;
1083 while(lo2>1){ //find last bit set to 1 (format len bit)
1084 lo2=lo2>>1;
1085 idx3++;
1086 }
1087 fmtLen =idx3+19;
1088 fc =0;
1089 cardnum=0;
1090 if(fmtLen==26){
1091 cardnum = (lo>>1)&0xFFFF;
1092 fc = (lo>>17)&0xFF;
1093 }
1094 if(fmtLen==34){
1095 cardnum = (lo>>1)&0xFFFF;
1096 fc= ((hi&1)<<15)|(lo>>17);
1097 }
1098 if(fmtLen==35){
1099 cardnum = (lo>>1)&0xFFFFF;
1100 fc = ((hi&1)<<11)|(lo>>21);
1101 }
1102 }
1103 else { //if bit 38 is not set then 37 bit format is used
1104 fmtLen = 37;
1105 fc = 0;
1106 cardnum = 0;
1107 if(fmtLen == 37){
1108 cardnum = (lo>>1)&0x7FFFF;
1109 fc = ((hi&0xF)<<12)|(lo>>20);
1110 }
1111 }
1112 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
1113 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
1114 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
1115 }
1116 setDemodBuf(BitStream,BitLen,idx);
1117 if (g_debugMode){
1118 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
1119 printDemodBuff();
1120 }
1121 return 1;
1122 }
1123
1124 //by marshmellow
1125 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
1126 //print full Paradox Prox ID and some bit format details if found
1127 int CmdFSKdemodParadox(const char *Cmd)
1128 {
1129 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1130 uint32_t hi2=0, hi=0, lo=0;
1131
1132 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1133 size_t BitLen = getFromGraphBuf(BitStream);
1134 if (BitLen==0) return 0;
1135 //get binary from fsk wave
1136 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1137 if (idx<0){
1138 if (g_debugMode){
1139 if (idx==-1){
1140 PrintAndLog("DEBUG: Just Noise Detected");
1141 } else if (idx == -2) {
1142 PrintAndLog("DEBUG: Error demoding fsk");
1143 } else if (idx == -3) {
1144 PrintAndLog("DEBUG: Preamble not found");
1145 } else if (idx == -4) {
1146 PrintAndLog("DEBUG: Error in Manchester data");
1147 } else {
1148 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1149 }
1150 }
1151 return 0;
1152 }
1153 if (hi2==0 && hi==0 && lo==0){
1154 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1155 return 0;
1156 }
1157 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1158 uint32_t cardnum = (lo>>10)&0xFFFF;
1159 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1160 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1161 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1162
1163 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1164 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
1165 setDemodBuf(BitStream,BitLen,idx);
1166 if (g_debugMode){
1167 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1168 printDemodBuff();
1169 }
1170 return 1;
1171 }
1172
1173 //by marshmellow
1174 //IO-Prox demod - FSK RF/64 with preamble of 000000001
1175 //print ioprox ID and some format details
1176 int CmdFSKdemodIO(const char *Cmd)
1177 {
1178 int idx=0;
1179 //something in graphbuffer?
1180 if (GraphTraceLen < 65) {
1181 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1182 return 0;
1183 }
1184 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1185 size_t BitLen = getFromGraphBuf(BitStream);
1186 if (BitLen==0) return 0;
1187
1188 //get binary from fsk wave
1189 idx = IOdemodFSK(BitStream,BitLen);
1190 if (idx<0){
1191 if (g_debugMode){
1192 if (idx==-1){
1193 PrintAndLog("DEBUG: Just Noise Detected");
1194 } else if (idx == -2) {
1195 PrintAndLog("DEBUG: not enough samples");
1196 } else if (idx == -3) {
1197 PrintAndLog("DEBUG: error during fskdemod");
1198 } else if (idx == -4) {
1199 PrintAndLog("DEBUG: Preamble not found");
1200 } else if (idx == -5) {
1201 PrintAndLog("DEBUG: Separator bits not found");
1202 } else {
1203 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1204 }
1205 }
1206 return 0;
1207 }
1208 if (idx==0){
1209 if (g_debugMode){
1210 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1211 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
1212 }
1213 return 0;
1214 }
1215 //Index map
1216 //0 10 20 30 40 50 60
1217 //| | | | | | |
1218 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1219 //-----------------------------------------------------------------------------
1220 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1221 //
1222 //XSF(version)facility:codeone+codetwo (raw)
1223 //Handle the data
1224 if (idx+64>BitLen) {
1225 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1226 return 0;
1227 }
1228 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]);
1229 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]);
1230 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]);
1231 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]);
1232 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]);
1233 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]);
1234 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]);
1235
1236 uint32_t code = bytebits_to_byte(BitStream+idx,32);
1237 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
1238 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1239 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
1240 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
1241 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
1242 uint16_t calccrc = 0;
1243
1244 for (uint8_t i=1; i<6; ++i){
1245 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
1246 }
1247 calccrc &= 0xff;
1248 calccrc = 0xff - calccrc;
1249
1250 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
1251
1252 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
1253 setDemodBuf(BitStream,64,idx);
1254 if (g_debugMode){
1255 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1256 printDemodBuff();
1257 }
1258 return 1;
1259 }
1260
1261 //by marshmellow
1262 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1263 //print full AWID Prox ID and some bit format details if found
1264 int CmdFSKdemodAWID(const char *Cmd)
1265 {
1266 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1267 size_t size = getFromGraphBuf(BitStream);
1268 if (size==0) return 0;
1269
1270 //get binary from fsk wave
1271 int idx = AWIDdemodFSK(BitStream, &size);
1272 if (idx<=0){
1273 if (g_debugMode){
1274 if (idx == -1)
1275 PrintAndLog("DEBUG: Error - not enough samples");
1276 else if (idx == -2)
1277 PrintAndLog("DEBUG: Error - only noise found");
1278 else if (idx == -3)
1279 PrintAndLog("DEBUG: Error - problem during FSK demod");
1280 else if (idx == -4)
1281 PrintAndLog("DEBUG: Error - AWID preamble not found");
1282 else if (idx == -5)
1283 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1284 else
1285 PrintAndLog("DEBUG: Error %d",idx);
1286 }
1287 return 0;
1288 }
1289
1290 // Index map
1291 // 0 10 20 30 40 50 60
1292 // | | | | | | |
1293 // 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
1294 // -----------------------------------------------------------------------------
1295 // 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
1296 // 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
1297 // |---26 bit---| |-----117----||-------------142-------------|
1298 // b = format bit len, o = odd parity of last 3 bits
1299 // f = facility code, c = card number
1300 // w = wiegand parity
1301 // (26 bit format shown)
1302
1303 //get raw ID before removing parities
1304 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1305 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1306 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1307 setDemodBuf(BitStream,96,idx);
1308
1309 size = removeParity(BitStream, idx+8, 4, 1, 88);
1310 if (size != 66){
1311 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1312 return 0;
1313 }
1314 // ok valid card found!
1315
1316 // Index map
1317 // 0 10 20 30 40 50 60
1318 // | | | | | | |
1319 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1320 // -----------------------------------------------------------------------------
1321 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1322 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1323 // |26 bit| |-117--| |-----142------|
1324 // b = format bit len, o = odd parity of last 3 bits
1325 // f = facility code, c = card number
1326 // w = wiegand parity
1327 // (26 bit format shown)
1328
1329 uint32_t fc = 0;
1330 uint32_t cardnum = 0;
1331 uint32_t code1 = 0;
1332 uint32_t code2 = 0;
1333 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
1334 if (fmtLen==26){
1335 fc = bytebits_to_byte(BitStream+9, 8);
1336 cardnum = bytebits_to_byte(BitStream+17, 16);
1337 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1338 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1339 } else {
1340 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1341 if (fmtLen>32){
1342 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1343 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
1344 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1345 } else{
1346 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1347 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1348 }
1349 }
1350 if (g_debugMode){
1351 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1352 printDemodBuff();
1353 }
1354 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
1355 return 1;
1356 }
1357
1358 //by marshmellow
1359 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1360 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1361 int CmdFSKdemodPyramid(const char *Cmd)
1362 {
1363 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1364 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1365 size_t size = getFromGraphBuf(BitStream);
1366 if (size==0) return 0;
1367
1368 //get binary from fsk wave
1369 int idx = PyramiddemodFSK(BitStream, &size);
1370 if (idx < 0){
1371 if (g_debugMode){
1372 if (idx == -5)
1373 PrintAndLog("DEBUG: Error - not enough samples");
1374 else if (idx == -1)
1375 PrintAndLog("DEBUG: Error - only noise found");
1376 else if (idx == -2)
1377 PrintAndLog("DEBUG: Error - problem during FSK demod");
1378 else if (idx == -3)
1379 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1380 else if (idx == -4)
1381 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1382 else
1383 PrintAndLog("DEBUG: Error - idx: %d",idx);
1384 }
1385 return 0;
1386 }
1387 // Index map
1388 // 0 10 20 30 40 50 60
1389 // | | | | | | |
1390 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1391 // -----------------------------------------------------------------------------
1392 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1393 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1394
1395 // 64 70 80 90 100 110 120
1396 // | | | | | | |
1397 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1398 // -----------------------------------------------------------------------------
1399 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1400 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1401 // |---115---||---------71---------|
1402 // s = format start bit, o = odd parity of last 7 bits
1403 // f = facility code, c = card number
1404 // w = wiegand parity, x = extra space for other formats
1405 // p = unknown checksum
1406 // (26 bit format shown)
1407
1408 //get bytes for checksum calc
1409 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
1410 uint8_t csBuff[14] = {0x00};
1411 for (uint8_t i = 0; i < 13; i++){
1412 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
1413 }
1414 //check checksum calc
1415 //checksum calc thanks to ICEMAN!!
1416 uint32_t checkCS = CRC8Maxim(csBuff,13);
1417
1418 //get raw ID before removing parities
1419 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1420 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1421 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1422 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
1423 setDemodBuf(BitStream,128,idx);
1424
1425 size = removeParity(BitStream, idx+8, 8, 1, 120);
1426 if (size != 105){
1427 if (g_debugMode)
1428 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1429 return 0;
1430 }
1431
1432 // ok valid card found!
1433
1434 // Index map
1435 // 0 10 20 30 40 50 60 70
1436 // | | | | | | | |
1437 // 01234567890123456789012345678901234567890123456789012345678901234567890
1438 // -----------------------------------------------------------------------
1439 // 00000000000000000000000000000000000000000000000000000000000000000000000
1440 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1441
1442 // 71 80 90 100
1443 // | | | |
1444 // 1 2 34567890 1234567890123456 7 8901234
1445 // ---------------------------------------
1446 // 1 1 01110011 0000000001000110 0 1001010
1447 // s w ffffffff cccccccccccccccc w ppppppp
1448 // |--115-| |------71------|
1449 // s = format start bit, o = odd parity of last 7 bits
1450 // f = facility code, c = card number
1451 // w = wiegand parity, x = extra space for other formats
1452 // p = unknown checksum
1453 // (26 bit format shown)
1454
1455 //find start bit to get fmtLen
1456 int j;
1457 for (j=0; j<size; j++){
1458 if(BitStream[j]) break;
1459 }
1460 uint8_t fmtLen = size-j-8;
1461 uint32_t fc = 0;
1462 uint32_t cardnum = 0;
1463 uint32_t code1 = 0;
1464 if (fmtLen==26){
1465 fc = bytebits_to_byte(BitStream+73, 8);
1466 cardnum = bytebits_to_byte(BitStream+81, 16);
1467 code1 = bytebits_to_byte(BitStream+72,fmtLen);
1468 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);
1469 } else if (fmtLen==45){
1470 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
1471 fc = bytebits_to_byte(BitStream+53, 10);
1472 cardnum = bytebits_to_byte(BitStream+63, 32);
1473 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1474 } else {
1475 cardnum = bytebits_to_byte(BitStream+81, 16);
1476 if (fmtLen>32){
1477 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
1478 //code2 = bytebits_to_byte(BitStream+(size-32),32);
1479 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1480 } else{
1481 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
1482 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1483 }
1484 }
1485 if (checksum == checkCS)
1486 PrintAndLog("Checksum %02x passed", checksum);
1487 else
1488 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
1489
1490 if (g_debugMode){
1491 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1492 printDemodBuff();
1493 }
1494 return 1;
1495 }
1496
1497 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
1498 // 8 databits + 1 parity (1)
1499 // CIITT 16 chksum
1500 // NATIONAL CODE, ICAR database
1501 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
1502 // FLAG (animal/non-animal)
1503 /*
1504 38 IDbits
1505 10 country code
1506 1 extra app bit
1507 14 reserved bits
1508 1 animal bit
1509 16 ccitt CRC chksum over 64bit ID CODE.
1510 24 appli bits.
1511
1512 -- sample: 985121004515220 [ 37FF65B88EF94 ]
1513 */
1514 int CmdFDXBdemodBI(const char *Cmd){
1515
1516 int invert = 1;
1517 int clk = 32;
1518 int errCnt = 0;
1519 int maxErr = 0;
1520 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
1521 size_t size = getFromGraphBuf(BitStream);
1522
1523 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
1524 if ( errCnt < 0 || errCnt > maxErr ) {
1525 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
1526 return 0;
1527 }
1528
1529 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
1530 if (errCnt < 0 || errCnt > maxErr ) {
1531 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
1532 return 0;
1533 }
1534
1535 int preambleIndex = FDXBdemodBI(BitStream, &size);
1536 if (preambleIndex < 0){
1537 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
1538 return 0;
1539 }
1540 if (size != 128) {
1541 if (g_debugMode) PrintAndLog("Error incorrect data length found");
1542 return 0;
1543 }
1544
1545 setDemodBuf(BitStream, 128, preambleIndex);
1546
1547 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
1548 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
1549 if ( size != 104 ) {
1550 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1551 return 0;
1552 }
1553 if (g_debugMode) {
1554 char *bin = sprint_bin_break(BitStream,size,16);
1555 PrintAndLog("DEBUG BinStream:\n%s",bin);
1556 }
1557 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1558 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1559
1560 //got a good demod
1561 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1562 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1563 uint8_t dataBlockBit = BitStream[48];
1564 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1565 uint8_t animalBit = BitStream[63];
1566 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1567 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1568
1569 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1570 uint8_t raw[8];
1571 num_to_bytes(rawid, 8, raw);
1572
1573 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1574
1575 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1576 PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode);
1577 PrintAndLog("National Code: %012" PRIu64, NationalCode);
1578 PrintAndLog("CountryCode: %04u", countryCode);
1579 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1580 PrintAndLog("reserved Code: %u", reservedCode);
1581 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1582 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1583 PrintAndLog("Extended: 0x%X\n", extended);
1584
1585 return 1;
1586 }
1587
1588
1589 //by marshmellow
1590 //attempt to psk1 demod graph buffer
1591 int PSKDemod(const char *Cmd, bool verbose)
1592 {
1593 int invert=0;
1594 int clk=0;
1595 int maxErr=100;
1596 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1597 if (clk==1){
1598 invert=1;
1599 clk=0;
1600 }
1601 if (invert != 0 && invert != 1) {
1602 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1603 return 0;
1604 }
1605 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1606 size_t BitLen = getFromGraphBuf(BitStream);
1607 if (BitLen==0) return 0;
1608 uint8_t carrier=countFC(BitStream, BitLen, 0);
1609 if (carrier!=2 && carrier!=4 && carrier!=8){
1610 //invalid carrier
1611 return 0;
1612 }
1613 if (g_debugMode){
1614 PrintAndLog("Carrier: rf/%d",carrier);
1615 }
1616 int errCnt=0;
1617 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1618 if (errCnt > maxErr){
1619 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1620 return 0;
1621 }
1622 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1623 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1624 return 0;
1625 }
1626 if (verbose || g_debugMode){
1627 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1628 if (errCnt>0){
1629 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1630 }
1631 }
1632 //prime demod buffer for output
1633 setDemodBuf(BitStream,BitLen,0);
1634 return 1;
1635 }
1636
1637 // Indala 26 bit decode
1638 // by marshmellow
1639 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1640 int CmdIndalaDecode(const char *Cmd)
1641 {
1642 int ans;
1643 if (strlen(Cmd)>0){
1644 ans = PSKDemod(Cmd, 0);
1645 } else{ //default to RF/32
1646 ans = PSKDemod("32", 0);
1647 }
1648
1649 if (!ans){
1650 if (g_debugMode)
1651 PrintAndLog("Error1: %d",ans);
1652 return 0;
1653 }
1654 uint8_t invert=0;
1655 size_t size = DemodBufferLen;
1656 int startIdx = indala26decode(DemodBuffer, &size, &invert);
1657 if (startIdx < 0 || size > 224) {
1658 if (g_debugMode)
1659 PrintAndLog("Error2: %d",ans);
1660 return -1;
1661 }
1662 setDemodBuf(DemodBuffer, size, (size_t)startIdx);
1663 if (invert)
1664 if (g_debugMode)
1665 PrintAndLog("Had to invert bits");
1666
1667 PrintAndLog("BitLen: %d",DemodBufferLen);
1668 //convert UID to HEX
1669 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1670 uid1=bytebits_to_byte(DemodBuffer,32);
1671 uid2=bytebits_to_byte(DemodBuffer+32,32);
1672 if (DemodBufferLen==64) {
1673 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1674 } else {
1675 uid3=bytebits_to_byte(DemodBuffer+64,32);
1676 uid4=bytebits_to_byte(DemodBuffer+96,32);
1677 uid5=bytebits_to_byte(DemodBuffer+128,32);
1678 uid6=bytebits_to_byte(DemodBuffer+160,32);
1679 uid7=bytebits_to_byte(DemodBuffer+192,32);
1680 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1681 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1682 }
1683 if (g_debugMode){
1684 PrintAndLog("DEBUG: printing demodbuffer:");
1685 printDemodBuff();
1686 }
1687 return 1;
1688 }
1689
1690 int CmdPSKNexWatch(const char *Cmd)
1691 {
1692 if (!PSKDemod("", false)) return 0;
1693 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};
1694 size_t startIdx = 0, size = DemodBufferLen;
1695 bool invert = false;
1696 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1697 // if didn't find preamble try again inverting
1698 if (!PSKDemod("1", false)) return 0;
1699 size = DemodBufferLen;
1700 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1701 invert = true;
1702 }
1703 if (size != 128) return 0;
1704 setDemodBuf(DemodBuffer, size, startIdx+4);
1705 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1706 //get ID
1707 uint32_t ID = 0;
1708 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1709 for (uint8_t idx=0; idx<8; idx++){
1710 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1711 }
1712 }
1713 //parity check (TBD)
1714
1715 //checksum check (TBD)
1716
1717 //output
1718 PrintAndLog("NexWatch ID: %d", ID);
1719 if (invert){
1720 PrintAndLog("Had to Invert - probably NexKey");
1721 for (uint8_t idx=0; idx<size; idx++)
1722 DemodBuffer[idx] ^= 1;
1723 }
1724
1725 CmdPrintDemodBuff("x");
1726 return 1;
1727 }
1728
1729 // by marshmellow
1730 // takes 3 arguments - clock, invert, maxErr as integers
1731 // attempts to demodulate nrz only
1732 // prints binary found and saves in demodbuffer for further commands
1733 int NRZrawDemod(const char *Cmd, bool verbose)
1734 {
1735 int invert=0;
1736 int clk=0;
1737 int maxErr=100;
1738 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1739 if (clk==1){
1740 invert=1;
1741 clk=0;
1742 }
1743 if (invert != 0 && invert != 1) {
1744 PrintAndLog("Invalid argument: %s", Cmd);
1745 return 0;
1746 }
1747 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1748 size_t BitLen = getFromGraphBuf(BitStream);
1749 if (BitLen==0) return 0;
1750 int errCnt=0;
1751 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
1752 if (errCnt > maxErr){
1753 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1754 return 0;
1755 }
1756 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1757 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1758 return 0;
1759 }
1760 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1761 //prime demod buffer for output
1762 setDemodBuf(BitStream,BitLen,0);
1763
1764 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1765 if (verbose || g_debugMode) {
1766 PrintAndLog("NRZ demoded bitstream:");
1767 // Now output the bitstream to the scrollback by line of 16 bits
1768 printDemodBuff();
1769 }
1770 return 1;
1771 }
1772
1773 int CmdNRZrawDemod(const char *Cmd)
1774 {
1775 char cmdp = param_getchar(Cmd, 0);
1776 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1777 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1778 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1779 PrintAndLog(" <invert>, 1 for invert output");
1780 PrintAndLog(" [set maximum allowed errors], default = 100.");
1781 PrintAndLog("");
1782 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1783 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1784 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1785 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1786 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");
1787 return 0;
1788 }
1789 return NRZrawDemod(Cmd, TRUE);
1790 }
1791
1792 // by marshmellow
1793 // takes 3 arguments - clock, invert, maxErr as integers
1794 // attempts to demodulate psk only
1795 // prints binary found and saves in demodbuffer for further commands
1796 int CmdPSK1rawDemod(const char *Cmd)
1797 {
1798 int ans;
1799 char cmdp = param_getchar(Cmd, 0);
1800 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1801 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1802 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1803 PrintAndLog(" <invert>, 1 for invert output");
1804 PrintAndLog(" [set maximum allowed errors], default = 100.");
1805 PrintAndLog("");
1806 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1807 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1808 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1809 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1810 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");
1811 return 0;
1812 }
1813 ans = PSKDemod(Cmd, TRUE);
1814 //output
1815 if (!ans){
1816 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1817 return 0;
1818 }
1819
1820 PrintAndLog("PSK1 demoded bitstream:");
1821 // Now output the bitstream to the scrollback by line of 16 bits
1822 printDemodBuff();
1823 return 1;
1824 }
1825
1826 // by marshmellow
1827 // takes same args as cmdpsk1rawdemod
1828 int CmdPSK2rawDemod(const char *Cmd)
1829 {
1830 int ans=0;
1831 char cmdp = param_getchar(Cmd, 0);
1832 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1833 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1834 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1835 PrintAndLog(" <invert>, 1 for invert output");
1836 PrintAndLog(" [set maximum allowed errors], default = 100.");
1837 PrintAndLog("");
1838 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1839 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1840 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1841 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1842 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");
1843 return 0;
1844 }
1845 ans=PSKDemod(Cmd, TRUE);
1846 if (!ans){
1847 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1848 return 0;
1849 }
1850 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1851 PrintAndLog("PSK2 demoded bitstream:");
1852 // Now output the bitstream to the scrollback by line of 16 bits
1853 printDemodBuff();
1854 return 1;
1855 }
1856
1857 // by marshmellow - combines all raw demod functions into one menu command
1858 int CmdRawDemod(const char *Cmd)
1859 {
1860 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1861
1862 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1863 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1864 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1865 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1866 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1867 PrintAndLog(" <options> see specific modulation help for optional parameters");
1868 PrintAndLog("");
1869 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1870 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1871 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1872 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1873 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1874 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1875 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1876 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1877 return 0;
1878 }
1879 char cmdp2 = Cmd[1];
1880 int ans = 0;
1881 if (cmdp == 'f' && cmdp2 == 's'){
1882 ans = CmdFSKrawdemod(Cmd+2);
1883 } else if(cmdp == 'a' && cmdp2 == 'b'){
1884 ans = Cmdaskbiphdemod(Cmd+2);
1885 } else if(cmdp == 'a' && cmdp2 == 'm'){
1886 ans = Cmdaskmandemod(Cmd+2);
1887 } else if(cmdp == 'a' && cmdp2 == 'r'){
1888 ans = Cmdaskrawdemod(Cmd+2);
1889 } else if(cmdp == 'n' && cmdp2 == 'r'){
1890 ans = CmdNRZrawDemod(Cmd+2);
1891 } else if(cmdp == 'p' && cmdp2 == '1'){
1892 ans = CmdPSK1rawDemod(Cmd+2);
1893 } else if(cmdp == 'p' && cmdp2 == '2'){
1894 ans = CmdPSK2rawDemod(Cmd+2);
1895 } else {
1896 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1897 }
1898 return ans;
1899 }
1900
1901 int CmdGrid(const char *Cmd)
1902 {
1903 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1904 PlotGridXdefault= PlotGridX;
1905 PlotGridYdefault= PlotGridY;
1906 RepaintGraphWindow();
1907 return 0;
1908 }
1909
1910 int CmdHexsamples(const char *Cmd)
1911 {
1912 int i, j;
1913 int requested = 0;
1914 int offset = 0;
1915 char string_buf[25];
1916 char* string_ptr = string_buf;
1917 uint8_t got[BIGBUF_SIZE];
1918
1919 sscanf(Cmd, "%i %i", &requested, &offset);
1920
1921 /* if no args send something */
1922 if (requested == 0) {
1923 requested = 8;
1924 }
1925 if (offset + requested > sizeof(got)) {
1926 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1927 return 0;
1928 }
1929
1930 GetFromBigBuf(got,requested,offset);
1931 WaitForResponse(CMD_ACK,NULL);
1932
1933 i = 0;
1934 for (j = 0; j < requested; j++) {
1935 i++;
1936 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1937 if (i == 8) {
1938 *(string_ptr - 1) = '\0'; // remove the trailing space
1939 PrintAndLog("%s", string_buf);
1940 string_buf[0] = '\0';
1941 string_ptr = string_buf;
1942 i = 0;
1943 }
1944 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1945 *(string_ptr - 1) = '\0';
1946 PrintAndLog("%s", string_buf);
1947 string_buf[0] = '\0';
1948 }
1949 }
1950 return 0;
1951 }
1952
1953 int CmdHide(const char *Cmd)
1954 {
1955 HideGraphWindow();
1956 return 0;
1957 }
1958
1959 //zero mean GraphBuffer
1960 int CmdHpf(const char *Cmd)
1961 {
1962 int i;
1963 int accum = 0;
1964
1965 for (i = 10; i < GraphTraceLen; ++i)
1966 accum += GraphBuffer[i];
1967 accum /= (GraphTraceLen - 10);
1968 for (i = 0; i < GraphTraceLen; ++i)
1969 GraphBuffer[i] -= accum;
1970
1971 RepaintGraphWindow();
1972 return 0;
1973 }
1974
1975 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1976 {
1977 int i;
1978 uint8_t val = 0;
1979 for(i =0 ; i < bits_per_sample; i++)
1980 {
1981 val |= (headBit(b) << (7-i));
1982 }
1983 return val;
1984 }
1985
1986 int getSamples(const char *Cmd, bool silent)
1987 {
1988 //If we get all but the last byte in bigbuf,
1989 // we don't have to worry about remaining trash
1990 // in the last byte in case the bits-per-sample
1991 // does not line up on byte boundaries
1992
1993 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1994
1995 int n = strtol(Cmd, NULL, 0);
1996
1997 if (n == 0 || n > sizeof(got))
1998 n = sizeof(got);
1999
2000 PrintAndLog("Reading %d bytes from device memory\n", n);
2001 GetFromBigBuf(got,n,0);
2002 PrintAndLog("Data fetched");
2003 UsbCommand response;
2004 WaitForResponse(CMD_ACK, &response);
2005 uint8_t bits_per_sample = 8;
2006
2007 //Old devices without this feature would send 0 at arg[0]
2008 if(response.arg[0] > 0)
2009 {
2010 sample_config *sc = (sample_config *) response.d.asBytes;
2011 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
2012 , sc->decimation);
2013 bits_per_sample = sc->bits_per_sample;
2014 }
2015 if(bits_per_sample < 8)
2016 {
2017 PrintAndLog("Unpacking...");
2018 BitstreamIn bout = { got, bits_per_sample * n, 0};
2019 int j =0;
2020 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
2021 uint8_t sample = getByte(bits_per_sample, &bout);
2022 GraphBuffer[j] = ((int) sample )- 128;
2023 }
2024 GraphTraceLen = j;
2025 PrintAndLog("Unpacked %d samples" , j );
2026 }else
2027 {
2028 for (int j = 0; j < n; j++) {
2029 GraphBuffer[j] = ((int)got[j]) - 128;
2030 }
2031 GraphTraceLen = n;
2032 }
2033
2034 RepaintGraphWindow();
2035 return 0;
2036 }
2037
2038 int CmdSamples(const char *Cmd)
2039 {
2040 return getSamples(Cmd, false);
2041 }
2042
2043 int CmdTuneSamples(const char *Cmd)
2044 {
2045 int timeout = 0, arg = FLAG_TUNE_ALL;
2046
2047 if(*Cmd == 'l') {
2048 arg = FLAG_TUNE_LF;
2049 } else if (*Cmd == 'h') {
2050 arg = FLAG_TUNE_HF;
2051 } else if (*Cmd != '\0') {
2052 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
2053 return 0;
2054 }
2055
2056 printf("\nMeasuring antenna characteristics, please wait...");
2057
2058 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
2059 SendCommand(&c);
2060
2061 UsbCommand resp;
2062 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
2063 timeout++;
2064 printf(".");
2065 if (timeout > 7) {
2066 PrintAndLog("\nNo response from Proxmark. Aborting...");
2067 return 1;
2068 }
2069 }
2070
2071 int peakv, peakf;
2072 int vLf125, vLf134, vHf;
2073 vLf125 = resp.arg[0] & 0xffff;
2074 vLf134 = resp.arg[0] >> 16;
2075 vHf = resp.arg[1] & 0xffff;;
2076 peakf = resp.arg[2] & 0xffff;
2077 peakv = resp.arg[2] >> 16;
2078 PrintAndLog("");
2079 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
2080 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
2081 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
2082 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
2083
2084 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
2085 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
2086 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2087 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2088
2089 if (peakv < LF_UNUSABLE_V)
2090 PrintAndLog("# Your LF antenna is unusable.");
2091 else if (peakv < LF_MARGINAL_V)
2092 PrintAndLog("# Your LF antenna is marginal.");
2093 if (vHf < HF_UNUSABLE_V)
2094 PrintAndLog("# Your HF antenna is unusable.");
2095 else if (vHf < HF_MARGINAL_V)
2096 PrintAndLog("# Your HF antenna is marginal.");
2097
2098 if (peakv >= LF_UNUSABLE_V) {
2099 for (int i = 0; i < 256; i++) {
2100 GraphBuffer[i] = resp.d.asBytes[i] - 128;
2101 }
2102 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
2103 PrintAndLog("\n");
2104 GraphTraceLen = 256;
2105 ShowGraphWindow();
2106 RepaintGraphWindow();
2107 }
2108
2109 return 0;
2110 }
2111
2112
2113 int CmdLoad(const char *Cmd)
2114 {
2115 char filename[FILE_PATH_SIZE] = {0x00};
2116 int len = 0;
2117
2118 len = strlen(Cmd);
2119 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2120 memcpy(filename, Cmd, len);
2121
2122 FILE *f = fopen(filename, "r");
2123 if (!f) {
2124 PrintAndLog("couldn't open '%s'", filename);
2125 return 0;
2126 }
2127
2128 GraphTraceLen = 0;
2129 char line[80];
2130 while (fgets(line, sizeof (line), f)) {
2131 GraphBuffer[GraphTraceLen] = atoi(line);
2132 GraphTraceLen++;
2133 }
2134 fclose(f);
2135 PrintAndLog("loaded %d samples", GraphTraceLen);
2136 RepaintGraphWindow();
2137 return 0;
2138 }
2139
2140 int CmdLtrim(const char *Cmd)
2141 {
2142 int ds = atoi(Cmd);
2143 if (GraphTraceLen<=0) return 0;
2144 for (int i = ds; i < GraphTraceLen; ++i)
2145 GraphBuffer[i-ds] = GraphBuffer[i];
2146 GraphTraceLen -= ds;
2147
2148 RepaintGraphWindow();
2149 return 0;
2150 }
2151
2152 // trim graph to input argument length
2153 int CmdRtrim(const char *Cmd)
2154 {
2155 int ds = atoi(Cmd);
2156
2157 GraphTraceLen = ds;
2158
2159 RepaintGraphWindow();
2160 return 0;
2161 }
2162
2163 int CmdNorm(const char *Cmd)
2164 {
2165 int i;
2166 int max = INT_MIN, min = INT_MAX;
2167
2168 for (i = 10; i < GraphTraceLen; ++i) {
2169 if (GraphBuffer[i] > max)
2170 max = GraphBuffer[i];
2171 if (GraphBuffer[i] < min)
2172 min = GraphBuffer[i];
2173 }
2174
2175 if (max != min) {
2176 for (i = 0; i < GraphTraceLen; ++i) {
2177 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
2178 (max - min);
2179 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
2180 }
2181 }
2182 RepaintGraphWindow();
2183 return 0;
2184 }
2185
2186 int CmdPlot(const char *Cmd)
2187 {
2188 ShowGraphWindow();
2189 return 0;
2190 }
2191
2192 int CmdSave(const char *Cmd)
2193 {
2194 char filename[FILE_PATH_SIZE] = {0x00};
2195 int len = 0;
2196
2197 len = strlen(Cmd);
2198 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2199 memcpy(filename, Cmd, len);
2200
2201
2202 FILE *f = fopen(filename, "w");
2203 if(!f) {
2204 PrintAndLog("couldn't open '%s'", filename);
2205 return 0;
2206 }
2207 int i;
2208 for (i = 0; i < GraphTraceLen; i++) {
2209 fprintf(f, "%d\n", GraphBuffer[i]);
2210 }
2211 fclose(f);
2212 PrintAndLog("saved to '%s'", Cmd);
2213 return 0;
2214 }
2215
2216 int CmdScale(const char *Cmd)
2217 {
2218 CursorScaleFactor = atoi(Cmd);
2219 if (CursorScaleFactor == 0) {
2220 PrintAndLog("bad, can't have zero scale");
2221 CursorScaleFactor = 1;
2222 }
2223 RepaintGraphWindow();
2224 return 0;
2225 }
2226
2227 int CmdDirectionalThreshold(const char *Cmd)
2228 {
2229 int8_t upThres = param_get8(Cmd, 0);
2230 int8_t downThres = param_get8(Cmd, 1);
2231
2232 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
2233
2234 int lastValue = GraphBuffer[0];
2235 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
2236
2237 for (int i = 1; i < GraphTraceLen; ++i) {
2238 // Apply first threshold to samples heading up
2239 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2240 {
2241 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2242 GraphBuffer[i] = 1;
2243 }
2244 // Apply second threshold to samples heading down
2245 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2246 {
2247 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2248 GraphBuffer[i] = -1;
2249 }
2250 else
2251 {
2252 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2253 GraphBuffer[i] = GraphBuffer[i-1];
2254
2255 }
2256 }
2257 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2258 RepaintGraphWindow();
2259 return 0;
2260 }
2261
2262 int CmdZerocrossings(const char *Cmd)
2263 {
2264 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2265 CmdHpf("");
2266
2267 int sign = 1;
2268 int zc = 0;
2269 int lastZc = 0;
2270
2271 for (int i = 0; i < GraphTraceLen; ++i) {
2272 if (GraphBuffer[i] * sign >= 0) {
2273 // No change in sign, reproduce the previous sample count.
2274 zc++;
2275 GraphBuffer[i] = lastZc;
2276 } else {
2277 // Change in sign, reset the sample count.
2278 sign = -sign;
2279 GraphBuffer[i] = lastZc;
2280 if (sign > 0) {
2281 lastZc = zc;
2282 zc = 0;
2283 }
2284 }
2285 }
2286
2287 RepaintGraphWindow();
2288 return 0;
2289 }
2290
2291 int usage_data_bin2hex(){
2292 PrintAndLog("Usage: data bin2hex <binary_digits>");
2293 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
2294 return 0;
2295 }
2296
2297 /**
2298 * @brief Utility for conversion via cmdline.
2299 * @param Cmd
2300 * @return
2301 */
2302 int Cmdbin2hex(const char *Cmd)
2303 {
2304 int bg =0, en =0;
2305 if(param_getptr(Cmd, &bg, &en, 0))
2306 {
2307 return usage_data_bin2hex();
2308 }
2309 //Number of digits supplied as argument
2310 size_t length = en - bg +1;
2311 size_t bytelen = (length+7) / 8;
2312 uint8_t* arr = (uint8_t *) malloc(bytelen);
2313 memset(arr, 0, bytelen);
2314 BitstreamOut bout = { arr, 0, 0 };
2315
2316 for(; bg <= en ;bg++)
2317 {
2318 char c = Cmd[bg];
2319 if( c == '1') pushBit(&bout, 1);
2320 else if( c == '0') pushBit(&bout, 0);
2321 else PrintAndLog("Ignoring '%c'", c);
2322 }
2323
2324 if(bout.numbits % 8 != 0)
2325 {
2326 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
2327 }
2328
2329 //Uses printf instead of PrintAndLog since the latter
2330 // adds linebreaks to each printout - this way was more convenient since we don't have to
2331 // allocate a string and write to that first...
2332 for(size_t x = 0; x < bytelen ; x++)
2333 {
2334 printf("%02X", arr[x]);
2335 }
2336 printf("\n");
2337 free(arr);
2338 return 0;
2339 }
2340
2341 int usage_data_hex2bin() {
2342 PrintAndLog("Usage: data hex2bin <hex_digits>");
2343 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
2344 return 0;
2345
2346 }
2347
2348 int Cmdhex2bin(const char *Cmd)
2349 {
2350 int bg =0, en =0;
2351 if(param_getptr(Cmd, &bg, &en, 0))
2352 {
2353 return usage_data_hex2bin();
2354 }
2355
2356
2357 while(bg <= en )
2358 {
2359 char x = Cmd[bg++];
2360 // capitalize
2361 if (x >= 'a' && x <= 'f')
2362 x -= 32;
2363 // convert to numeric value
2364 if (x >= '0' && x <= '9')
2365 x -= '0';
2366 else if (x >= 'A' && x <= 'F')
2367 x -= 'A' - 10;
2368 else
2369 continue;
2370
2371 //Uses printf instead of PrintAndLog since the latter
2372 // adds linebreaks to each printout - this way was more convenient since we don't have to
2373 // allocate a string and write to that first...
2374
2375 for(int i= 0 ; i < 4 ; ++i)
2376 printf("%d",(x >> (3 - i)) & 1);
2377 }
2378 printf("\n");
2379
2380 return 0;
2381 }
2382
2383 static command_t CommandTable[] =
2384 {
2385 {"help", CmdHelp, 1, "This help"},
2386 {"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)"},
2387 {"askem410xdemod", CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
2388 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
2389 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking tag from GraphBuffer"},
2390 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
2391 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
2392 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
2393 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
2394 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2395 {"dec", CmdDec, 1, "Decimate samples"},
2396 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
2397 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
2398 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
2399 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
2400 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2401 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2402 {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2403 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
2404 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
2405 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
2406 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
2407 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
2408 {"hide", CmdHide, 1, "Hide graph window"},
2409 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
2410 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2411 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
2412 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
2413 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
2414 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
2415 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
2416 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
2417 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
2418 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
2419 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2420 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
2421 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2422 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
2423 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
2424 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
2425 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2426 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
2427 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
2428 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
2429 {NULL, NULL, 0, NULL}
2430 };
2431
2432 int CmdData(const char *Cmd)
2433 {
2434 CmdsParse(CommandTable, Cmd);
2435 return 0;
2436 }
2437
2438 int CmdHelp(const char *Cmd)
2439 {
2440 CmdsHelp(CommandTable);
2441 return 0;
2442 }
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