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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 #include "cmdlfem4x.h"// for em410x demod
29
30 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
31 uint8_t g_debugMode=0;
32 size_t DemodBufferLen=0;
33 //size_t g_demodStartIdx=0;
34 //uint8_t g_demodClock=0;
35
36 static int CmdHelp(const char *Cmd);
37
38 //set the demod buffer with given array of binary (one bit per byte)
39 //by marshmellow
40 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
41 {
42 if (buff == NULL)
43 return;
44
45 if ( size >= MAX_DEMOD_BUF_LEN)
46 size = MAX_DEMOD_BUF_LEN;
47
48 size_t i = 0;
49 for (; i < size; i++){
50 DemodBuffer[i]=buff[startIdx++];
51 }
52 DemodBufferLen=size;
53 return;
54 }
55
56 int CmdSetDebugMode(const char *Cmd)
57 {
58 int demod=0;
59 sscanf(Cmd, "%i", &demod);
60 g_debugMode=(uint8_t)demod;
61 return 1;
62 }
63
64 int usage_data_printdemodbuf(){
65 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
66 PrintAndLog("Options: ");
67 PrintAndLog(" h This help");
68 PrintAndLog(" x output in hex (omit for binary output)");
69 PrintAndLog(" o <offset> enter offset in # of bits");
70 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
71 return 0;
72 }
73
74 //by marshmellow
75 void printDemodBuff(void)
76 {
77 int bitLen = DemodBufferLen;
78 if (bitLen<1) {
79 PrintAndLog("no bits found in demod buffer");
80 return;
81 }
82 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
83
84 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
85 PrintAndLog("%s",bin);
86
87 return;
88 }
89
90 int CmdPrintDemodBuff(const char *Cmd)
91 {
92 char hex[512]={0x00};
93 bool hexMode = false;
94 bool errors = false;
95 uint32_t offset = 0; //could be size_t but no param_get16...
96 uint32_t length = 512;
97 char cmdp = 0;
98 while(param_getchar(Cmd, cmdp) != 0x00)
99 {
100 switch(param_getchar(Cmd, cmdp))
101 {
102 case 'h':
103 case 'H':
104 return usage_data_printdemodbuf();
105 case 'x':
106 case 'X':
107 hexMode = true;
108 cmdp++;
109 break;
110 case 'o':
111 case 'O':
112 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
113 if (!offset) errors = true;
114 cmdp += 2;
115 break;
116 case 'l':
117 case 'L':
118 length = param_get32ex(Cmd, cmdp+1, 512, 10);
119 if (!length) errors = true;
120 cmdp += 2;
121 break;
122 default:
123 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
124 errors = true;
125 break;
126 }
127 if(errors) break;
128 }
129 //Validations
130 if(errors) return usage_data_printdemodbuf();
131 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
132 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
133
134 if (hexMode){
135 char *buf = (char *) (DemodBuffer + offset);
136 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
137 numBits = binarraytohex(hex, buf, numBits);
138 if (numBits==0) return 0;
139 PrintAndLog("DemodBuffer: %s",hex);
140 } else {
141 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
142 }
143 return 1;
144 }
145
146 //by marshmellow
147 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
148 int CmdGetBitStream(const char *Cmd)
149 {
150 int i;
151 CmdHpf(Cmd);
152 for (i = 0; i < GraphTraceLen; i++) {
153 if (GraphBuffer[i] >= 1) {
154 GraphBuffer[i] = 1;
155 } else {
156 GraphBuffer[i] = 0;
157 }
158 }
159 RepaintGraphWindow();
160 return 0;
161 }
162
163 //by marshmellow
164 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
165 // (amp may not be needed anymore)
166 //verbose will print results and demoding messages
167 //emSearch will auto search for EM410x format in bitstream
168 //askType switches decode: ask/raw = 0, ask/manchester = 1
169 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
170 int invert=0;
171 int clk=0;
172 int maxErr=100;
173 int maxLen=0;
174 uint8_t askamp = 0;
175 char amp = param_getchar(Cmd, 0);
176 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
177 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
178 if (!maxLen) maxLen = BIGBUF_SIZE;
179 if (invert != 0 && invert != 1) {
180 PrintAndLog("Invalid argument: %s", Cmd);
181 return 0;
182 }
183 if (clk==1){
184 invert=1;
185 clk=0;
186 }
187 size_t BitLen = getFromGraphBuf(BitStream);
188 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
189 if (BitLen < 255) return 0;
190 if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
191 int foundclk = 0;
192 //amp before ST check
193 if (amp == 'a' || amp == 'A') {
194 askAmp(BitStream, BitLen);
195 }
196 bool st = false;
197 size_t ststart = 0, stend = 0;
198 if (*stCheck) st = DetectST_ext(BitStream, &BitLen, &foundclk, &ststart, &stend);
199 if (st) {
200 *stCheck = st;
201 clk = (clk == 0) ? foundclk : clk;
202 CursorCPos = ststart;
203 CursorDPos = stend;
204 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
205 }
206 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);
207 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
208 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
209 return 0;
210 }
211 if (errCnt > maxErr){
212 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
213 return 0;
214 }
215 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
216
217 //output
218 setDemodBuf(BitStream,BitLen,0);
219 if (verbose || g_debugMode){
220 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
221 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
222 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
223 // Now output the bitstream to the scrollback by line of 16 bits
224 printDemodBuff();
225
226 }
227 uint64_t lo = 0;
228 uint32_t hi = 0;
229 if (emSearch){
230 AskEm410xDecode(true, &hi, &lo);
231 }
232 return 1;
233 }
234 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
235 bool st = false;
236 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
237 }
238
239 //by marshmellow
240 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
241 //attempts to demodulate ask while decoding manchester
242 //prints binary found and saves in graphbuffer for further commands
243 int Cmdaskmandemod(const char *Cmd)
244 {
245 char cmdp = param_getchar(Cmd, 0);
246 if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
247 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
248 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
249 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
250 PrintAndLog(" <invert>, 1 to invert output");
251 PrintAndLog(" [set maximum allowed errors], default = 100");
252 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
253 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
254 PrintAndLog("");
255 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
256 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
257 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
258 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
259 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");
260 return 0;
261 }
262 bool st = true;
263 if (Cmd[0]=='s')
264 return ASKDemod_ext(Cmd++, true, true, 1, &st);
265 else if (Cmd[1] == 's')
266 return ASKDemod_ext(Cmd+=2, true, true, 1, &st);
267 else
268 return ASKDemod(Cmd, true, true, 1);
269 }
270
271 //by marshmellow
272 //manchester decode
273 //stricktly take 10 and 01 and convert to 0 and 1
274 int Cmdmandecoderaw(const char *Cmd)
275 {
276 int i =0;
277 int errCnt=0;
278 size_t size=0;
279 int invert=0;
280 int maxErr = 20;
281 char cmdp = param_getchar(Cmd, 0);
282 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
283 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
284 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
285 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
286 PrintAndLog(" [invert] invert output");
287 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
288 PrintAndLog("");
289 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
290 return 0;
291 }
292 if (DemodBufferLen==0) return 0;
293 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
294 int high=0,low=0;
295 for (;i<DemodBufferLen;++i){
296 if (DemodBuffer[i]>high) high=DemodBuffer[i];
297 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
298 BitStream[i]=DemodBuffer[i];
299 }
300 if (high>7 || low <0 ){
301 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
302 return 0;
303 }
304
305 sscanf(Cmd, "%i %i", &invert, &maxErr);
306 size=i;
307 uint8_t alignPos = 0;
308 errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
309 if (errCnt>=maxErr){
310 PrintAndLog("Too many errors: %d",errCnt);
311 return 0;
312 }
313 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
314 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
315 if (errCnt==0){
316 uint64_t id = 0;
317 uint32_t hi = 0;
318 size_t idx=0;
319 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
320 //need to adjust to set bitstream back to manchester encoded data
321 //setDemodBuf(BitStream, size, idx);
322
323 printEM410x(hi, id);
324 }
325 }
326 return 1;
327 }
328
329 //by marshmellow
330 //biphase decode
331 //take 01 or 10 = 0 and 11 or 00 = 1
332 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
333 // and "invert" default = 0 if 1 it will invert output
334 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
335 int CmdBiphaseDecodeRaw(const char *Cmd)
336 {
337 size_t size=0;
338 int offset=0, invert=0, maxErr=20, errCnt=0;
339 char cmdp = param_getchar(Cmd, 0);
340 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
341 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
342 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
343 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
344 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
345 PrintAndLog("");
346 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
347 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
348 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
349 PrintAndLog("");
350 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
351 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
352 return 0;
353 }
354 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
355 if (DemodBufferLen==0){
356 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
357 return 0;
358 }
359 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
360 memcpy(BitStream, DemodBuffer, DemodBufferLen);
361 size = DemodBufferLen;
362 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
363 if (errCnt<0){
364 PrintAndLog("Error during decode:%d", errCnt);
365 return 0;
366 }
367 if (errCnt>maxErr){
368 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
369 return 0;
370 }
371
372 if (errCnt>0){
373 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
374 }
375 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
376 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
377
378 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
379 return 1;
380 }
381
382 //by marshmellow
383 // - ASK Demod then Biphase decode GraphBuffer samples
384 int ASKbiphaseDemod(const char *Cmd, bool verbose)
385 {
386 //ask raw demod GraphBuffer first
387 int offset=0, clk=0, invert=0, maxErr=0;
388 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
389
390 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
391 size_t size = getFromGraphBuf(BitStream);
392 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
393 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
394 if ( errCnt < 0 || errCnt > maxErr ) {
395 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
396 return 0;
397 }
398
399 //attempt to Biphase decode BitStream
400 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
401 if (errCnt < 0){
402 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
403 return 0;
404 }
405 if (errCnt > maxErr) {
406 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
407 return 0;
408 }
409 //success set DemodBuffer and return
410 setDemodBuf(BitStream, size, 0);
411 if (g_debugMode || verbose){
412 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
413 printDemodBuff();
414 }
415 return 1;
416 }
417 //by marshmellow - see ASKbiphaseDemod
418 int Cmdaskbiphdemod(const char *Cmd)
419 {
420 char cmdp = param_getchar(Cmd, 0);
421 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
422 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
423 PrintAndLog(" [offset], offset to begin biphase, default=0");
424 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
425 PrintAndLog(" <invert>, 1 to invert output");
426 PrintAndLog(" [set maximum allowed errors], default = 100");
427 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
428 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
429 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
430 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
431 PrintAndLog(" NOTE: any other arg must have previous args set to work");
432 PrintAndLog("");
433 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
434 PrintAndLog("");
435 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
436 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
437 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
438 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
439 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
440 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");
441 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");
442 return 0;
443 }
444 return ASKbiphaseDemod(Cmd, true);
445 }
446
447 //could be split to a gProxII file
448 //by marshmellow
449 //attempts to demodulate and identify a G_Prox_II verex/chubb card
450 //WARNING: if it fails during some points it will destroy the DemodBuffer data
451 // but will leave the GraphBuffer intact.
452 //if successful it will push askraw data back to demod buffer ready for emulation
453 int CmdG_Prox_II_Demod(const char *Cmd)
454 {
455 if (!ASKbiphaseDemod(Cmd, false)){
456 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
457 return 0;
458 }
459 size_t size = DemodBufferLen;
460 //call lfdemod.c demod for gProxII
461 int ans = gProxII_Demod(DemodBuffer, &size);
462 if (ans < 0){
463 if (g_debugMode) PrintAndLog("Error gProxII_Demod");
464 return 0;
465 }
466 //got a good demod of 96 bits
467 uint8_t ByteStream[8] = {0x00};
468 uint8_t xorKey=0;
469 size_t startIdx = ans + 6; //start after 6 bit preamble
470
471 uint8_t bits_no_spacer[90];
472 //so as to not mess with raw DemodBuffer copy to a new sample array
473 memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
474 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
475 size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
476 if (bitLen != 72) {
477 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
478 return 0;
479 }
480 // get key and then get all 8 bytes of payload decoded
481 xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
482 for (size_t idx = 0; idx < 8; idx++) {
483 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
484 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
485 }
486 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
487 //
488 uint8_t fmtLen = ByteStream[0]>>2;
489 uint32_t FC = 0;
490 uint32_t Card = 0;
491 //get raw 96 bits to print
492 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
493 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
494 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
495
496 if (fmtLen==36){
497 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
498 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
499 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
500 } else if(fmtLen==26){
501 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
502 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
503 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
504 } else {
505 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
506 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
507 }
508 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
509 setDemodBuf(DemodBuffer+ans, 96, 0);
510 return 1;
511 }
512
513 //could be moved to a viking file
514 //by marshmellow
515 //see ASKDemod for what args are accepted
516 int CmdVikingDemod(const char *Cmd)
517 {
518 if (!ASKDemod(Cmd, false, false, 1)) {
519 if (g_debugMode) PrintAndLog("ASKDemod failed");
520 return 0;
521 }
522 size_t size = DemodBufferLen;
523 //call lfdemod.c demod for Viking
524 int ans = VikingDemod_AM(DemodBuffer, &size);
525 if (ans < 0) {
526 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
527 return 0;
528 }
529 //got a good demod
530 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
531 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
532 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
533 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
534 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);
535 PrintAndLog("Raw: %08X%08X", raw1,raw2);
536 setDemodBuf(DemodBuffer+ans, 64, 0);
537 return 1;
538 }
539
540 //by marshmellow - see ASKDemod
541 int Cmdaskrawdemod(const char *Cmd)
542 {
543 char cmdp = param_getchar(Cmd, 0);
544 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
545 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
546 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
547 PrintAndLog(" <invert>, 1 to invert output");
548 PrintAndLog(" [set maximum allowed errors], default = 100");
549 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
550 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
551 PrintAndLog("");
552 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
553 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
554 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
555 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
556 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
557 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");
558 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");
559 return 0;
560 }
561 return ASKDemod(Cmd, true, false, 0);
562 }
563
564 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
565 {
566 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
567 size_t Correlation = 0;
568 int maxSum = 0;
569 int lastMax = 0;
570 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
571 for (int i = 0; i < GraphTraceLen - window; ++i) {
572 int sum = 0;
573 for (int j = 0; j < window; ++j) {
574 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
575 }
576 CorrelBuffer[i] = sum;
577 if (sum >= maxSum-100 && sum <= maxSum+100){
578 //another max
579 Correlation = i-lastMax;
580 lastMax = i;
581 if (sum > maxSum) maxSum = sum;
582 } else if (sum > maxSum){
583 maxSum=sum;
584 lastMax = i;
585 }
586 }
587 if (Correlation==0){
588 //try again with wider margin
589 for (int i = 0; i < GraphTraceLen - window; i++){
590 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
591 //another max
592 Correlation = i-lastMax;
593 lastMax = i;
594 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
595 }
596 }
597 }
598 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
599
600 if (SaveGrph){
601 GraphTraceLen = GraphTraceLen - window;
602 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
603 RepaintGraphWindow();
604 }
605 return Correlation;
606 }
607
608 int usage_data_autocorr(void)
609 {
610 //print help
611 PrintAndLog("Usage: data autocorr [window] [g]");
612 PrintAndLog("Options: ");
613 PrintAndLog(" h This help");
614 PrintAndLog(" [window] window length for correlation - default = 4000");
615 PrintAndLog(" g save back to GraphBuffer (overwrite)");
616 return 0;
617 }
618
619 int CmdAutoCorr(const char *Cmd)
620 {
621 char cmdp = param_getchar(Cmd, 0);
622 if (cmdp == 'h' || cmdp == 'H')
623 return usage_data_autocorr();
624 int window = 4000; //set default
625 char grph=0;
626 bool updateGrph = false;
627 sscanf(Cmd, "%i %c", &window, &grph);
628
629 if (window >= GraphTraceLen) {
630 PrintAndLog("window must be smaller than trace (%d samples)",
631 GraphTraceLen);
632 return 0;
633 }
634 if (grph == 'g') updateGrph=true;
635 return AutoCorrelate(window, updateGrph, true);
636 }
637
638 int CmdBitsamples(const char *Cmd)
639 {
640 int cnt = 0;
641 uint8_t got[12288];
642
643 GetFromBigBuf(got,sizeof(got),0);
644 WaitForResponse(CMD_ACK,NULL);
645
646 for (int j = 0; j < sizeof(got); j++) {
647 for (int k = 0; k < 8; k++) {
648 if(got[j] & (1 << (7 - k))) {
649 GraphBuffer[cnt++] = 1;
650 } else {
651 GraphBuffer[cnt++] = 0;
652 }
653 }
654 }
655 GraphTraceLen = cnt;
656 RepaintGraphWindow();
657 return 0;
658 }
659
660 int CmdBuffClear(const char *Cmd)
661 {
662 UsbCommand c = {CMD_BUFF_CLEAR};
663 SendCommand(&c);
664 ClearGraph(true);
665 return 0;
666 }
667
668 int CmdDec(const char *Cmd)
669 {
670 for (int i = 0; i < (GraphTraceLen / 2); ++i)
671 GraphBuffer[i] = GraphBuffer[i * 2];
672 GraphTraceLen /= 2;
673 PrintAndLog("decimated by 2");
674 RepaintGraphWindow();
675 return 0;
676 }
677 /**
678 * Undecimate - I'd call it 'interpolate', but we'll save that
679 * name until someone does an actual interpolation command, not just
680 * blindly repeating samples
681 * @param Cmd
682 * @return
683 */
684 int CmdUndec(const char *Cmd)
685 {
686 if(param_getchar(Cmd, 0) == 'h')
687 {
688 PrintAndLog("Usage: data undec [factor]");
689 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
690 PrintAndLog("Options: ");
691 PrintAndLog(" h This help");
692 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
693 PrintAndLog("Example: 'data undec 3'");
694 return 0;
695 }
696
697 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
698 //We have memory, don't we?
699 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
700 uint32_t g_index = 0, s_index = 0;
701 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
702 {
703 int count = 0;
704 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
705 swap[s_index+count] = GraphBuffer[g_index];
706
707 s_index += count;
708 g_index++;
709 }
710
711 memcpy(GraphBuffer, swap, s_index * sizeof(int));
712 GraphTraceLen = s_index;
713 RepaintGraphWindow();
714 return 0;
715 }
716
717 //by marshmellow
718 //shift graph zero up or down based on input + or -
719 int CmdGraphShiftZero(const char *Cmd)
720 {
721
722 int shift=0;
723 //set options from parameters entered with the command
724 sscanf(Cmd, "%i", &shift);
725 int shiftedVal=0;
726 for(int i = 0; i<GraphTraceLen; i++){
727 shiftedVal=GraphBuffer[i]+shift;
728 if (shiftedVal>127)
729 shiftedVal=127;
730 else if (shiftedVal<-127)
731 shiftedVal=-127;
732 GraphBuffer[i]= shiftedVal;
733 }
734 CmdNorm("");
735 return 0;
736 }
737
738 //by marshmellow
739 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
740 //similar to dirtheshold, threshold commands
741 //takes a threshold length which is the measured length between two samples then determines an edge
742 int CmdAskEdgeDetect(const char *Cmd)
743 {
744 int thresLen = 25;
745 int Last = 0;
746 sscanf(Cmd, "%i", &thresLen);
747
748 for(int i = 1; i<GraphTraceLen; i++){
749 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
750 Last = 127;
751 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
752 Last = -127;
753 GraphBuffer[i-1] = Last;
754 }
755 RepaintGraphWindow();
756 return 0;
757 }
758
759 /* Print our clock rate */
760 // uses data from graphbuffer
761 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
762 int CmdDetectClockRate(const char *Cmd)
763 {
764 char cmdp = param_getchar(Cmd, 0);
765 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
766 PrintAndLog("Usage: data detectclock [modulation] <clock>");
767 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
768 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
769 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
770 PrintAndLog("");
771 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
772 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
773 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
774 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
775 }
776 int ans=0;
777 if (cmdp == 'a'){
778 ans = GetAskClock(Cmd+1, true, false);
779 } else if (cmdp == 'f'){
780 ans = GetFskClock("", true, false);
781 } else if (cmdp == 'n'){
782 ans = GetNrzClock("", true, false);
783 } else if (cmdp == 'p'){
784 ans = GetPskClock("", true, false);
785 } else {
786 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
787 }
788 return ans;
789 }
790
791 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
792 {
793 static char fType[8];
794 memset(fType, 0x00, 8);
795 char *fskType = fType;
796 if (fchigh==10 && fclow==8){
797 if (invert) //fsk2a
798 memcpy(fskType, "FSK2a", 5);
799 else //fsk2
800 memcpy(fskType, "FSK2", 4);
801 } else if (fchigh == 8 && fclow == 5) {
802 if (invert)
803 memcpy(fskType, "FSK1", 4);
804 else
805 memcpy(fskType, "FSK1a", 5);
806 } else {
807 memcpy(fskType, "FSK??", 5);
808 }
809 return fskType;
810 }
811
812 //by marshmellow
813 //fsk raw demod and print binary
814 //takes 4 arguments - Clock, invert, fchigh, fclow
815 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
816 int FSKrawDemod(const char *Cmd, bool verbose)
817 {
818 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
819 uint8_t rfLen, invert, fchigh, fclow;
820 //set defaults
821 //set options from parameters entered with the command
822 rfLen = param_get8(Cmd, 0);
823 invert = param_get8(Cmd, 1);
824 fchigh = param_get8(Cmd, 2);
825 fclow = param_get8(Cmd, 3);
826
827 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
828 if (rfLen==1) {
829 invert = 1; //if invert option only is used
830 rfLen = 0;
831 }
832 }
833 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
834 size_t BitLen = getFromGraphBuf(BitStream);
835 if (BitLen==0) return 0;
836 //get field clock lengths
837 uint16_t fcs=0;
838 if (!fchigh || !fclow) {
839 fcs = countFC(BitStream, BitLen, 1);
840 if (!fcs) {
841 fchigh = 10;
842 fclow = 8;
843 } else {
844 fchigh = (fcs >> 8) & 0x00FF;
845 fclow = fcs & 0x00FF;
846 }
847 }
848 //get bit clock length
849 if (!rfLen) {
850 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
851 if (!rfLen) rfLen = 50;
852 }
853 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
854 if (size > 0) {
855 setDemodBuf(BitStream,size,0);
856
857 // Now output the bitstream to the scrollback by line of 16 bits
858 if (verbose || g_debugMode) {
859 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
860 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
861 printDemodBuff();
862 }
863
864 return 1;
865 } else {
866 if (g_debugMode) PrintAndLog("no FSK data found");
867 }
868 return 0;
869 }
870
871 //by marshmellow
872 //fsk raw demod and print binary
873 //takes 4 arguments - Clock, invert, fchigh, fclow
874 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
875 int CmdFSKrawdemod(const char *Cmd)
876 {
877 char cmdp = param_getchar(Cmd, 0);
878 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
879 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
880 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
881 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
882 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
883 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
884 PrintAndLog("");
885 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
886 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
887 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
888 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
889 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
890 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
891 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
892 return 0;
893 }
894 return FSKrawDemod(Cmd, true);
895 }
896
897 //move to cmdlfhid.c
898 //by marshmellow (based on existing demod + holiman's refactor)
899 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
900 //print full HID Prox ID and some bit format details if found
901 int CmdFSKdemodHID(const char *Cmd)
902 {
903 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
904 uint32_t hi2=0, hi=0, lo=0;
905
906 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
907 size_t BitLen = getFromGraphBuf(BitStream);
908 if (BitLen==0) return 0;
909 //get binary from fsk wave
910 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
911 if (idx<0){
912 if (g_debugMode){
913 if (idx==-1){
914 PrintAndLog("DEBUG: Just Noise Detected");
915 } else if (idx == -2) {
916 PrintAndLog("DEBUG: Error demoding fsk");
917 } else if (idx == -3) {
918 PrintAndLog("DEBUG: Preamble not found");
919 } else if (idx == -4) {
920 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
921 } else {
922 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
923 }
924 }
925 return 0;
926 }
927 if (hi2==0 && hi==0 && lo==0) {
928 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
929 return 0;
930 }
931 if (hi2 != 0){ //extra large HID tags
932 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
933 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
934 }
935 else { //standard HID tags <38 bits
936 uint8_t fmtLen = 0;
937 uint32_t fc = 0;
938 uint32_t cardnum = 0;
939 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
940 uint32_t lo2=0;
941 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
942 uint8_t idx3 = 1;
943 while(lo2>1){ //find last bit set to 1 (format len bit)
944 lo2=lo2>>1;
945 idx3++;
946 }
947 fmtLen =idx3+19;
948 fc =0;
949 cardnum=0;
950 if(fmtLen==26){
951 cardnum = (lo>>1)&0xFFFF;
952 fc = (lo>>17)&0xFF;
953 }
954 if(fmtLen==34){
955 cardnum = (lo>>1)&0xFFFF;
956 fc= ((hi&1)<<15)|(lo>>17);
957 }
958 if(fmtLen==35){
959 cardnum = (lo>>1)&0xFFFFF;
960 fc = ((hi&1)<<11)|(lo>>21);
961 }
962 }
963 else { //if bit 38 is not set then 37 bit format is used
964 fmtLen = 37;
965 fc = 0;
966 cardnum = 0;
967 if(fmtLen == 37){
968 cardnum = (lo>>1)&0x7FFFF;
969 fc = ((hi&0xF)<<12)|(lo>>20);
970 }
971 }
972 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
973 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
974 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
975 }
976 setDemodBuf(BitStream,BitLen,idx);
977 if (g_debugMode){
978 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
979 printDemodBuff();
980 }
981 return 1;
982 }
983
984
985 //by marshmellow
986 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
987 //print full Paradox Prox ID and some bit format details if found
988 int CmdFSKdemodParadox(const char *Cmd)
989 {
990 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
991 uint32_t hi2=0, hi=0, lo=0;
992
993 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
994 size_t BitLen = getFromGraphBuf(BitStream);
995 if (BitLen==0) return 0;
996 //get binary from fsk wave
997 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
998 if (idx<0){
999 if (g_debugMode){
1000 if (idx==-1){
1001 PrintAndLog("DEBUG: Just Noise Detected");
1002 } else if (idx == -2) {
1003 PrintAndLog("DEBUG: Error demoding fsk");
1004 } else if (idx == -3) {
1005 PrintAndLog("DEBUG: Preamble not found");
1006 } else if (idx == -4) {
1007 PrintAndLog("DEBUG: Error in Manchester data");
1008 } else {
1009 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1010 }
1011 }
1012 return 0;
1013 }
1014 if (hi2==0 && hi==0 && lo==0){
1015 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1016 return 0;
1017 }
1018 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1019 uint32_t cardnum = (lo>>10)&0xFFFF;
1020 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1021 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1022 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1023
1024 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1025 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
1026 setDemodBuf(BitStream,BitLen,idx);
1027 if (g_debugMode){
1028 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1029 printDemodBuff();
1030 }
1031 return 1;
1032 }
1033
1034 //by marshmellow
1035 //IO-Prox demod - FSK RF/64 with preamble of 000000001
1036 //print ioprox ID and some format details
1037 int CmdFSKdemodIO(const char *Cmd)
1038 {
1039 int idx=0;
1040 //something in graphbuffer?
1041 if (GraphTraceLen < 65) {
1042 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1043 return 0;
1044 }
1045 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1046 size_t BitLen = getFromGraphBuf(BitStream);
1047 if (BitLen==0) return 0;
1048
1049 //get binary from fsk wave
1050 idx = IOdemodFSK(BitStream,BitLen);
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: not enough samples");
1057 } else if (idx == -3) {
1058 PrintAndLog("DEBUG: error during fskdemod");
1059 } else if (idx == -4) {
1060 PrintAndLog("DEBUG: Preamble not found");
1061 } else if (idx == -5) {
1062 PrintAndLog("DEBUG: Separator bits not found");
1063 } else {
1064 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1065 }
1066 }
1067 return 0;
1068 }
1069 if (idx==0){
1070 if (g_debugMode){
1071 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1072 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
1073 }
1074 return 0;
1075 }
1076 //Index map
1077 //0 10 20 30 40 50 60
1078 //| | | | | | |
1079 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1080 //-----------------------------------------------------------------------------
1081 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1082 //
1083 //XSF(version)facility:codeone+codetwo (raw)
1084 //Handle the data
1085 if (idx+64>BitLen) {
1086 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1087 return 0;
1088 }
1089 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]);
1090 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]);
1091 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]);
1092 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]);
1093 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]);
1094 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]);
1095 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]);
1096
1097 uint32_t code = bytebits_to_byte(BitStream+idx,32);
1098 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
1099 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1100 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
1101 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
1102 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
1103 uint16_t calccrc = 0;
1104
1105 for (uint8_t i=1; i<6; ++i){
1106 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
1107 }
1108 calccrc &= 0xff;
1109 calccrc = 0xff - calccrc;
1110
1111 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
1112
1113 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
1114 setDemodBuf(BitStream,64,idx);
1115 if (g_debugMode){
1116 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1117 printDemodBuff();
1118 }
1119 return 1;
1120 }
1121
1122 //by marshmellow
1123 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1124 //print full AWID Prox ID and some bit format details if found
1125 int CmdFSKdemodAWID(const char *Cmd)
1126 {
1127 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1128 size_t size = getFromGraphBuf(BitStream);
1129 if (size==0) return 0;
1130
1131 //get binary from fsk wave
1132 int idx = AWIDdemodFSK(BitStream, &size);
1133 if (idx<=0){
1134 if (g_debugMode){
1135 if (idx == -1)
1136 PrintAndLog("DEBUG: Error - not enough samples");
1137 else if (idx == -2)
1138 PrintAndLog("DEBUG: Error - only noise found");
1139 else if (idx == -3)
1140 PrintAndLog("DEBUG: Error - problem during FSK demod");
1141 else if (idx == -4)
1142 PrintAndLog("DEBUG: Error - AWID preamble not found");
1143 else if (idx == -5)
1144 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1145 else
1146 PrintAndLog("DEBUG: Error %d",idx);
1147 }
1148 return 0;
1149 }
1150
1151 // Index map
1152 // 0 10 20 30 40 50 60
1153 // | | | | | | |
1154 // 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
1155 // -----------------------------------------------------------------------------
1156 // 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
1157 // 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
1158 // |---26 bit---| |-----117----||-------------142-------------|
1159 // b = format bit len, o = odd parity of last 3 bits
1160 // f = facility code, c = card number
1161 // w = wiegand parity
1162 // (26 bit format shown)
1163
1164 //get raw ID before removing parities
1165 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1166 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1167 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1168 setDemodBuf(BitStream,96,idx);
1169
1170 size = removeParity(BitStream, idx+8, 4, 1, 88);
1171 if (size != 66){
1172 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1173 return 0;
1174 }
1175 // ok valid card found!
1176
1177 // Index map
1178 // 0 10 20 30 40 50 60
1179 // | | | | | | |
1180 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1181 // -----------------------------------------------------------------------------
1182 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1183 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1184 // |26 bit| |-117--| |-----142------|
1185 // b = format bit len, o = odd parity of last 3 bits
1186 // f = facility code, c = card number
1187 // w = wiegand parity
1188 // (26 bit format shown)
1189
1190 uint32_t fc = 0;
1191 uint32_t cardnum = 0;
1192 uint32_t code1 = 0;
1193 uint32_t code2 = 0;
1194 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
1195 if (fmtLen==26){
1196 fc = bytebits_to_byte(BitStream+9, 8);
1197 cardnum = bytebits_to_byte(BitStream+17, 16);
1198 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1199 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1200 } else {
1201 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1202 if (fmtLen>32){
1203 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1204 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
1205 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1206 } else{
1207 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1208 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1209 }
1210 }
1211 if (g_debugMode){
1212 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1213 printDemodBuff();
1214 }
1215 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
1216 return 1;
1217 }
1218
1219 //by marshmellow
1220 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1221 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1222 int CmdFSKdemodPyramid(const char *Cmd)
1223 {
1224 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1225 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1226 size_t size = getFromGraphBuf(BitStream);
1227 if (size==0) return 0;
1228
1229 //get binary from fsk wave
1230 int idx = PyramiddemodFSK(BitStream, &size);
1231 if (idx < 0){
1232 if (g_debugMode){
1233 if (idx == -5)
1234 PrintAndLog("DEBUG: Error - not enough samples");
1235 else if (idx == -1)
1236 PrintAndLog("DEBUG: Error - only noise found");
1237 else if (idx == -2)
1238 PrintAndLog("DEBUG: Error - problem during FSK demod");
1239 else if (idx == -3)
1240 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1241 else if (idx == -4)
1242 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1243 else
1244 PrintAndLog("DEBUG: Error - idx: %d",idx);
1245 }
1246 return 0;
1247 }
1248 // Index map
1249 // 0 10 20 30 40 50 60
1250 // | | | | | | |
1251 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1252 // -----------------------------------------------------------------------------
1253 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1254 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1255
1256 // 64 70 80 90 100 110 120
1257 // | | | | | | |
1258 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1259 // -----------------------------------------------------------------------------
1260 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1261 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1262 // |---115---||---------71---------|
1263 // s = format start bit, o = odd parity of last 7 bits
1264 // f = facility code, c = card number
1265 // w = wiegand parity, x = extra space for other formats
1266 // p = unknown checksum
1267 // (26 bit format shown)
1268
1269 //get bytes for checksum calc
1270 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
1271 uint8_t csBuff[14] = {0x00};
1272 for (uint8_t i = 0; i < 13; i++){
1273 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
1274 }
1275 //check checksum calc
1276 //checksum calc thanks to ICEMAN!!
1277 uint32_t checkCS = CRC8Maxim(csBuff,13);
1278
1279 //get raw ID before removing parities
1280 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1281 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1282 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1283 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
1284 setDemodBuf(BitStream,128,idx);
1285
1286 size = removeParity(BitStream, idx+8, 8, 1, 120);
1287 if (size != 105){
1288 if (g_debugMode)
1289 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1290 return 0;
1291 }
1292
1293 // ok valid card found!
1294
1295 // Index map
1296 // 0 10 20 30 40 50 60 70
1297 // | | | | | | | |
1298 // 01234567890123456789012345678901234567890123456789012345678901234567890
1299 // -----------------------------------------------------------------------
1300 // 00000000000000000000000000000000000000000000000000000000000000000000000
1301 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1302
1303 // 71 80 90 100
1304 // | | | |
1305 // 1 2 34567890 1234567890123456 7 8901234
1306 // ---------------------------------------
1307 // 1 1 01110011 0000000001000110 0 1001010
1308 // s w ffffffff cccccccccccccccc w ppppppp
1309 // |--115-| |------71------|
1310 // s = format start bit, o = odd parity of last 7 bits
1311 // f = facility code, c = card number
1312 // w = wiegand parity, x = extra space for other formats
1313 // p = unknown checksum
1314 // (26 bit format shown)
1315
1316 //find start bit to get fmtLen
1317 int j;
1318 for (j=0; j<size; j++){
1319 if(BitStream[j]) break;
1320 }
1321 uint8_t fmtLen = size-j-8;
1322 uint32_t fc = 0;
1323 uint32_t cardnum = 0;
1324 uint32_t code1 = 0;
1325 if (fmtLen==26){
1326 fc = bytebits_to_byte(BitStream+73, 8);
1327 cardnum = bytebits_to_byte(BitStream+81, 16);
1328 code1 = bytebits_to_byte(BitStream+72,fmtLen);
1329 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);
1330 } else if (fmtLen==45){
1331 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
1332 fc = bytebits_to_byte(BitStream+53, 10);
1333 cardnum = bytebits_to_byte(BitStream+63, 32);
1334 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1335 } else {
1336 cardnum = bytebits_to_byte(BitStream+81, 16);
1337 if (fmtLen>32){
1338 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
1339 //code2 = bytebits_to_byte(BitStream+(size-32),32);
1340 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1341 } else{
1342 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
1343 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1344 }
1345 }
1346 if (checksum == checkCS)
1347 PrintAndLog("Checksum %02x passed", checksum);
1348 else
1349 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
1350
1351 if (g_debugMode){
1352 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1353 printDemodBuff();
1354 }
1355 return 1;
1356 }
1357
1358 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
1359 // 8 databits + 1 parity (1)
1360 // CIITT 16 chksum
1361 // NATIONAL CODE, ICAR database
1362 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
1363 // FLAG (animal/non-animal)
1364 /*
1365 38 IDbits
1366 10 country code
1367 1 extra app bit
1368 14 reserved bits
1369 1 animal bit
1370 16 ccitt CRC chksum over 64bit ID CODE.
1371 24 appli bits.
1372
1373 -- sample: 985121004515220 [ 37FF65B88EF94 ]
1374 */
1375 int CmdFDXBdemodBI(const char *Cmd){
1376
1377 int invert = 1;
1378 int clk = 32;
1379 int errCnt = 0;
1380 int maxErr = 0;
1381 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
1382 size_t size = getFromGraphBuf(BitStream);
1383
1384 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
1385 if ( errCnt < 0 || errCnt > maxErr ) {
1386 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
1387 return 0;
1388 }
1389
1390 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
1391 if (errCnt < 0 || errCnt > maxErr ) {
1392 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
1393 return 0;
1394 }
1395
1396 int preambleIndex = FDXBdemodBI(BitStream, &size);
1397 if (preambleIndex < 0){
1398 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
1399 return 0;
1400 }
1401 if (size != 128) {
1402 if (g_debugMode) PrintAndLog("Error incorrect data length found");
1403 return 0;
1404 }
1405
1406 setDemodBuf(BitStream, 128, preambleIndex);
1407
1408 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
1409 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
1410 if ( size != 104 ) {
1411 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1412 return 0;
1413 }
1414 if (g_debugMode) {
1415 char *bin = sprint_bin_break(BitStream,size,16);
1416 PrintAndLog("DEBUG BinStream:\n%s",bin);
1417 }
1418 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1419 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1420
1421 //got a good demod
1422 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1423 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1424 uint8_t dataBlockBit = BitStream[48];
1425 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1426 uint8_t animalBit = BitStream[63];
1427 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1428 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1429
1430 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1431 uint8_t raw[8];
1432 num_to_bytes(rawid, 8, raw);
1433
1434 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1435
1436 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1437 PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode);
1438 PrintAndLog("National Code: %012" PRIu64, NationalCode);
1439 PrintAndLog("CountryCode: %04u", countryCode);
1440 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1441 PrintAndLog("reserved Code: %u", reservedCode);
1442 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1443 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1444 PrintAndLog("Extended: 0x%X\n", extended);
1445
1446 return 1;
1447 }
1448
1449
1450 //by marshmellow
1451 //attempt to psk1 demod graph buffer
1452 int PSKDemod(const char *Cmd, bool verbose)
1453 {
1454 int invert=0;
1455 int clk=0;
1456 int maxErr=100;
1457 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1458 if (clk==1){
1459 invert=1;
1460 clk=0;
1461 }
1462 if (invert != 0 && invert != 1) {
1463 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1464 return 0;
1465 }
1466 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1467 size_t BitLen = getFromGraphBuf(BitStream);
1468 if (BitLen==0) return 0;
1469 uint8_t carrier=countFC(BitStream, BitLen, 0);
1470 if (carrier!=2 && carrier!=4 && carrier!=8){
1471 //invalid carrier
1472 return 0;
1473 }
1474 if (g_debugMode){
1475 PrintAndLog("Carrier: rf/%d",carrier);
1476 }
1477 int errCnt=0;
1478 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1479 if (errCnt > maxErr){
1480 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1481 return 0;
1482 }
1483 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1484 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1485 return 0;
1486 }
1487 if (verbose || g_debugMode){
1488 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1489 if (errCnt>0){
1490 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1491 }
1492 }
1493 //prime demod buffer for output
1494 setDemodBuf(BitStream,BitLen,0);
1495 return 1;
1496 }
1497
1498 // Indala 26 bit decode
1499 // by marshmellow
1500 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1501 int CmdIndalaDecode(const char *Cmd)
1502 {
1503 int ans;
1504 if (strlen(Cmd)>0){
1505 ans = PSKDemod(Cmd, 0);
1506 } else{ //default to RF/32
1507 ans = PSKDemod("32", 0);
1508 }
1509
1510 if (!ans){
1511 if (g_debugMode)
1512 PrintAndLog("Error1: %d",ans);
1513 return 0;
1514 }
1515 uint8_t invert=0;
1516 size_t size = DemodBufferLen;
1517 int startIdx = indala26decode(DemodBuffer, &size, &invert);
1518 if (startIdx < 0 || size > 224) {
1519 if (g_debugMode)
1520 PrintAndLog("Error2: %d",ans);
1521 return -1;
1522 }
1523 setDemodBuf(DemodBuffer, size, (size_t)startIdx);
1524 if (invert)
1525 if (g_debugMode)
1526 PrintAndLog("Had to invert bits");
1527
1528 PrintAndLog("BitLen: %d",DemodBufferLen);
1529 //convert UID to HEX
1530 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1531 uid1=bytebits_to_byte(DemodBuffer,32);
1532 uid2=bytebits_to_byte(DemodBuffer+32,32);
1533 if (DemodBufferLen==64) {
1534 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1535 } else {
1536 uid3=bytebits_to_byte(DemodBuffer+64,32);
1537 uid4=bytebits_to_byte(DemodBuffer+96,32);
1538 uid5=bytebits_to_byte(DemodBuffer+128,32);
1539 uid6=bytebits_to_byte(DemodBuffer+160,32);
1540 uid7=bytebits_to_byte(DemodBuffer+192,32);
1541 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1542 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1543 }
1544 if (g_debugMode){
1545 PrintAndLog("DEBUG: printing demodbuffer:");
1546 printDemodBuff();
1547 }
1548 return 1;
1549 }
1550
1551 int CmdPSKNexWatch(const char *Cmd)
1552 {
1553 if (!PSKDemod("", false)) return 0;
1554 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};
1555 size_t startIdx = 0, size = DemodBufferLen;
1556 bool invert = false;
1557 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1558 // if didn't find preamble try again inverting
1559 if (!PSKDemod("1", false)) return 0;
1560 size = DemodBufferLen;
1561 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1562 invert = true;
1563 }
1564 if (size != 128) return 0;
1565 setDemodBuf(DemodBuffer, size, startIdx+4);
1566 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1567 //get ID
1568 uint32_t ID = 0;
1569 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1570 for (uint8_t idx=0; idx<8; idx++){
1571 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1572 }
1573 }
1574 //parity check (TBD)
1575
1576 //checksum check (TBD)
1577
1578 //output
1579 PrintAndLog("NexWatch ID: %d", ID);
1580 if (invert){
1581 PrintAndLog("Had to Invert - probably NexKey");
1582 for (uint8_t idx=0; idx<size; idx++)
1583 DemodBuffer[idx] ^= 1;
1584 }
1585
1586 CmdPrintDemodBuff("x");
1587 return 1;
1588 }
1589
1590 // by marshmellow
1591 // takes 3 arguments - clock, invert, maxErr as integers
1592 // attempts to demodulate nrz only
1593 // prints binary found and saves in demodbuffer for further commands
1594 int NRZrawDemod(const char *Cmd, bool verbose)
1595 {
1596 int invert=0;
1597 int clk=0;
1598 int maxErr=100;
1599 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1600 if (clk==1){
1601 invert=1;
1602 clk=0;
1603 }
1604 if (invert != 0 && invert != 1) {
1605 PrintAndLog("Invalid argument: %s", Cmd);
1606 return 0;
1607 }
1608 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1609 size_t BitLen = getFromGraphBuf(BitStream);
1610 if (BitLen==0) return 0;
1611 int errCnt=0;
1612 int clkStartIdx = 0;
1613 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
1614 if (errCnt > maxErr){
1615 if (g_debugMode) 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) 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) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1623 //prime demod buffer for output
1624 setDemodBuf(BitStream,BitLen,0);
1625
1626 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1627 if (verbose || g_debugMode) {
1628 PrintAndLog("NRZ demoded bitstream:");
1629 // Now output the bitstream to the scrollback by line of 16 bits
1630 printDemodBuff();
1631 }
1632 return 1;
1633 }
1634
1635 int CmdNRZrawDemod(const char *Cmd)
1636 {
1637 char cmdp = param_getchar(Cmd, 0);
1638 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1639 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1640 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1641 PrintAndLog(" <invert>, 1 for invert output");
1642 PrintAndLog(" [set maximum allowed errors], default = 100.");
1643 PrintAndLog("");
1644 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
1645 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1646 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1647 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1648 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");
1649 return 0;
1650 }
1651 return NRZrawDemod(Cmd, true);
1652 }
1653
1654 // by marshmellow
1655 // takes 3 arguments - clock, invert, maxErr as integers
1656 // attempts to demodulate psk only
1657 // prints binary found and saves in demodbuffer for further commands
1658 int CmdPSK1rawDemod(const char *Cmd)
1659 {
1660 int ans;
1661 char cmdp = param_getchar(Cmd, 0);
1662 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1663 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1664 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1665 PrintAndLog(" <invert>, 1 for invert output");
1666 PrintAndLog(" [set maximum allowed errors], default = 100.");
1667 PrintAndLog("");
1668 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1669 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1670 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1671 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1672 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");
1673 return 0;
1674 }
1675 ans = PSKDemod(Cmd, true);
1676 //output
1677 if (!ans){
1678 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1679 return 0;
1680 }
1681
1682 PrintAndLog("PSK1 demoded bitstream:");
1683 // Now output the bitstream to the scrollback by line of 16 bits
1684 printDemodBuff();
1685 return 1;
1686 }
1687
1688 // by marshmellow
1689 // takes same args as cmdpsk1rawdemod
1690 int CmdPSK2rawDemod(const char *Cmd)
1691 {
1692 int ans=0;
1693 char cmdp = param_getchar(Cmd, 0);
1694 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1695 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1696 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1697 PrintAndLog(" <invert>, 1 for invert output");
1698 PrintAndLog(" [set maximum allowed errors], default = 100.");
1699 PrintAndLog("");
1700 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1701 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1702 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1703 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1704 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");
1705 return 0;
1706 }
1707 ans=PSKDemod(Cmd, true);
1708 if (!ans){
1709 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1710 return 0;
1711 }
1712 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1713 PrintAndLog("PSK2 demoded bitstream:");
1714 // Now output the bitstream to the scrollback by line of 16 bits
1715 printDemodBuff();
1716 return 1;
1717 }
1718
1719 // by marshmellow - combines all raw demod functions into one menu command
1720 int CmdRawDemod(const char *Cmd)
1721 {
1722 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1723
1724 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1725 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1726 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1727 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1728 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1729 PrintAndLog(" <options> see specific modulation help for optional parameters");
1730 PrintAndLog("");
1731 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1732 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1733 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1734 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1735 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1736 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1737 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1738 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1739 return 0;
1740 }
1741 char cmdp2 = Cmd[1];
1742 int ans = 0;
1743 if (cmdp == 'f' && cmdp2 == 's'){
1744 ans = CmdFSKrawdemod(Cmd+2);
1745 } else if(cmdp == 'a' && cmdp2 == 'b'){
1746 ans = Cmdaskbiphdemod(Cmd+2);
1747 } else if(cmdp == 'a' && cmdp2 == 'm'){
1748 ans = Cmdaskmandemod(Cmd+2);
1749 } else if(cmdp == 'a' && cmdp2 == 'r'){
1750 ans = Cmdaskrawdemod(Cmd+2);
1751 } else if(cmdp == 'n' && cmdp2 == 'r'){
1752 ans = CmdNRZrawDemod(Cmd+2);
1753 } else if(cmdp == 'p' && cmdp2 == '1'){
1754 ans = CmdPSK1rawDemod(Cmd+2);
1755 } else if(cmdp == 'p' && cmdp2 == '2'){
1756 ans = CmdPSK2rawDemod(Cmd+2);
1757 } else {
1758 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1759 }
1760 return ans;
1761 }
1762
1763 int CmdGrid(const char *Cmd)
1764 {
1765 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1766 PlotGridXdefault= PlotGridX;
1767 PlotGridYdefault= PlotGridY;
1768 RepaintGraphWindow();
1769 return 0;
1770 }
1771
1772 int CmdSetGraphMarkers(const char *Cmd) {
1773 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1774 RepaintGraphWindow();
1775 return 0;
1776 }
1777
1778 int CmdHexsamples(const char *Cmd)
1779 {
1780 int i, j;
1781 int requested = 0;
1782 int offset = 0;
1783 char string_buf[25];
1784 char* string_ptr = string_buf;
1785 uint8_t got[BIGBUF_SIZE];
1786
1787 sscanf(Cmd, "%i %i", &requested, &offset);
1788
1789 /* if no args send something */
1790 if (requested == 0) {
1791 requested = 8;
1792 }
1793 if (offset + requested > sizeof(got)) {
1794 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1795 return 0;
1796 }
1797
1798 GetFromBigBuf(got,requested,offset);
1799 WaitForResponse(CMD_ACK,NULL);
1800
1801 i = 0;
1802 for (j = 0; j < requested; j++) {
1803 i++;
1804 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1805 if (i == 8) {
1806 *(string_ptr - 1) = '\0'; // remove the trailing space
1807 PrintAndLog("%s", string_buf);
1808 string_buf[0] = '\0';
1809 string_ptr = string_buf;
1810 i = 0;
1811 }
1812 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1813 *(string_ptr - 1) = '\0';
1814 PrintAndLog("%s", string_buf);
1815 string_buf[0] = '\0';
1816 }
1817 }
1818 return 0;
1819 }
1820
1821 int CmdHide(const char *Cmd)
1822 {
1823 HideGraphWindow();
1824 return 0;
1825 }
1826
1827 //zero mean GraphBuffer
1828 int CmdHpf(const char *Cmd)
1829 {
1830 int i;
1831 int accum = 0;
1832
1833 for (i = 10; i < GraphTraceLen; ++i)
1834 accum += GraphBuffer[i];
1835 accum /= (GraphTraceLen - 10);
1836 for (i = 0; i < GraphTraceLen; ++i)
1837 GraphBuffer[i] -= accum;
1838
1839 RepaintGraphWindow();
1840 return 0;
1841 }
1842
1843 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1844 {
1845 int i;
1846 uint8_t val = 0;
1847 for(i =0 ; i < bits_per_sample; i++)
1848 {
1849 val |= (headBit(b) << (7-i));
1850 }
1851 return val;
1852 }
1853
1854 int getSamples(const char *Cmd, bool silent)
1855 {
1856 //If we get all but the last byte in bigbuf,
1857 // we don't have to worry about remaining trash
1858 // in the last byte in case the bits-per-sample
1859 // does not line up on byte boundaries
1860
1861 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1862
1863 int n = strtol(Cmd, NULL, 0);
1864
1865 if (n == 0 || n > sizeof(got))
1866 n = sizeof(got);
1867
1868 PrintAndLog("Reading %d bytes from device memory\n", n);
1869 GetFromBigBuf(got,n,0);
1870 PrintAndLog("Data fetched");
1871 UsbCommand response;
1872 WaitForResponse(CMD_ACK, &response);
1873 uint8_t bits_per_sample = 8;
1874
1875 //Old devices without this feature would send 0 at arg[0]
1876 if(response.arg[0] > 0)
1877 {
1878 sample_config *sc = (sample_config *) response.d.asBytes;
1879 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1880 , sc->decimation);
1881 bits_per_sample = sc->bits_per_sample;
1882 }
1883 if(bits_per_sample < 8)
1884 {
1885 PrintAndLog("Unpacking...");
1886 BitstreamIn bout = { got, bits_per_sample * n, 0};
1887 int j =0;
1888 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1889 uint8_t sample = getByte(bits_per_sample, &bout);
1890 GraphBuffer[j] = ((int) sample )- 128;
1891 }
1892 GraphTraceLen = j;
1893 PrintAndLog("Unpacked %d samples" , j );
1894 }else
1895 {
1896 for (int j = 0; j < n; j++) {
1897 GraphBuffer[j] = ((int)got[j]) - 128;
1898 }
1899 GraphTraceLen = n;
1900 }
1901
1902 RepaintGraphWindow();
1903 return 0;
1904 }
1905
1906 int CmdSamples(const char *Cmd)
1907 {
1908 return getSamples(Cmd, false);
1909 }
1910
1911 int CmdTuneSamples(const char *Cmd)
1912 {
1913 int timeout = 0, arg = FLAG_TUNE_ALL;
1914
1915 if(*Cmd == 'l') {
1916 arg = FLAG_TUNE_LF;
1917 } else if (*Cmd == 'h') {
1918 arg = FLAG_TUNE_HF;
1919 } else if (*Cmd != '\0') {
1920 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1921 return 0;
1922 }
1923
1924 printf("\nMeasuring antenna characteristics, please wait...");
1925
1926 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1927 SendCommand(&c);
1928
1929 UsbCommand resp;
1930 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1931 timeout++;
1932 printf(".");
1933 if (timeout > 7) {
1934 PrintAndLog("\nNo response from Proxmark. Aborting...");
1935 return 1;
1936 }
1937 }
1938
1939 int peakv, peakf;
1940 int vLf125, vLf134, vHf;
1941 vLf125 = resp.arg[0] & 0xffff;
1942 vLf134 = resp.arg[0] >> 16;
1943 vHf = resp.arg[1] & 0xffff;;
1944 peakf = resp.arg[2] & 0xffff;
1945 peakv = resp.arg[2] >> 16;
1946 PrintAndLog("");
1947 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1948 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1949 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1950 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1951
1952 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1953 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1954 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1955 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1956
1957 if (peakv < LF_UNUSABLE_V)
1958 PrintAndLog("# Your LF antenna is unusable.");
1959 else if (peakv < LF_MARGINAL_V)
1960 PrintAndLog("# Your LF antenna is marginal.");
1961 if (vHf < HF_UNUSABLE_V)
1962 PrintAndLog("# Your HF antenna is unusable.");
1963 else if (vHf < HF_MARGINAL_V)
1964 PrintAndLog("# Your HF antenna is marginal.");
1965
1966 if (peakv >= LF_UNUSABLE_V) {
1967 for (int i = 0; i < 256; i++) {
1968 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1969 }
1970 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1971 PrintAndLog("\n");
1972 GraphTraceLen = 256;
1973 ShowGraphWindow();
1974 RepaintGraphWindow();
1975 }
1976
1977 return 0;
1978 }
1979
1980
1981 int CmdLoad(const char *Cmd)
1982 {
1983 char filename[FILE_PATH_SIZE] = {0x00};
1984 int len = 0;
1985
1986 len = strlen(Cmd);
1987 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1988 memcpy(filename, Cmd, len);
1989
1990 FILE *f = fopen(filename, "r");
1991 if (!f) {
1992 PrintAndLog("couldn't open '%s'", filename);
1993 return 0;
1994 }
1995
1996 GraphTraceLen = 0;
1997 char line[80];
1998 while (fgets(line, sizeof (line), f)) {
1999 GraphBuffer[GraphTraceLen] = atoi(line);
2000 GraphTraceLen++;
2001 }
2002 fclose(f);
2003 PrintAndLog("loaded %d samples", GraphTraceLen);
2004 RepaintGraphWindow();
2005 return 0;
2006 }
2007
2008 int CmdLtrim(const char *Cmd)
2009 {
2010 int ds = atoi(Cmd);
2011 if (GraphTraceLen<=0) return 0;
2012 for (int i = ds; i < GraphTraceLen; ++i)
2013 GraphBuffer[i-ds] = GraphBuffer[i];
2014 GraphTraceLen -= ds;
2015
2016 RepaintGraphWindow();
2017 return 0;
2018 }
2019
2020 // trim graph to input argument length
2021 int CmdRtrim(const char *Cmd)
2022 {
2023 int ds = atoi(Cmd);
2024
2025 GraphTraceLen = ds;
2026
2027 RepaintGraphWindow();
2028 return 0;
2029 }
2030
2031 // trim graph (middle) piece
2032 int CmdMtrim(const char *Cmd) {
2033 int start = 0, stop = 0;
2034 sscanf(Cmd, "%i %i", &start, &stop);
2035
2036 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
2037 start++; //leave start position sample
2038
2039 GraphTraceLen -= stop - start;
2040 for (int i = 0; i < GraphTraceLen; i++) {
2041 GraphBuffer[start+i] = GraphBuffer[stop+i];
2042 }
2043 return 0;
2044 }
2045
2046
2047 int CmdNorm(const char *Cmd)
2048 {
2049 int i;
2050 int max = INT_MIN, min = INT_MAX;
2051
2052 for (i = 10; i < GraphTraceLen; ++i) {
2053 if (GraphBuffer[i] > max)
2054 max = GraphBuffer[i];
2055 if (GraphBuffer[i] < min)
2056 min = GraphBuffer[i];
2057 }
2058
2059 if (max != min) {
2060 for (i = 0; i < GraphTraceLen; ++i) {
2061 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
2062 (max - min);
2063 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
2064 }
2065 }
2066 RepaintGraphWindow();
2067 return 0;
2068 }
2069
2070 int CmdPlot(const char *Cmd)
2071 {
2072 ShowGraphWindow();
2073 return 0;
2074 }
2075
2076 int CmdSave(const char *Cmd)
2077 {
2078 char filename[FILE_PATH_SIZE] = {0x00};
2079 int len = 0;
2080
2081 len = strlen(Cmd);
2082 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2083 memcpy(filename, Cmd, len);
2084
2085
2086 FILE *f = fopen(filename, "w");
2087 if(!f) {
2088 PrintAndLog("couldn't open '%s'", filename);
2089 return 0;
2090 }
2091 int i;
2092 for (i = 0; i < GraphTraceLen; i++) {
2093 fprintf(f, "%d\n", GraphBuffer[i]);
2094 }
2095 fclose(f);
2096 PrintAndLog("saved to '%s'", Cmd);
2097 return 0;
2098 }
2099
2100 int CmdScale(const char *Cmd)
2101 {
2102 CursorScaleFactor = atoi(Cmd);
2103 if (CursorScaleFactor == 0) {
2104 PrintAndLog("bad, can't have zero scale");
2105 CursorScaleFactor = 1;
2106 }
2107 RepaintGraphWindow();
2108 return 0;
2109 }
2110
2111 int CmdDirectionalThreshold(const char *Cmd)
2112 {
2113 int8_t upThres = param_get8(Cmd, 0);
2114 int8_t downThres = param_get8(Cmd, 1);
2115
2116 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
2117
2118 int lastValue = GraphBuffer[0];
2119 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
2120
2121 for (int i = 1; i < GraphTraceLen; ++i) {
2122 // Apply first threshold to samples heading up
2123 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2124 {
2125 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2126 GraphBuffer[i] = 127;
2127 }
2128 // Apply second threshold to samples heading down
2129 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2130 {
2131 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2132 GraphBuffer[i] = -127;
2133 }
2134 else
2135 {
2136 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2137 GraphBuffer[i] = GraphBuffer[i-1];
2138
2139 }
2140 }
2141 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2142 RepaintGraphWindow();
2143 return 0;
2144 }
2145
2146 int CmdZerocrossings(const char *Cmd)
2147 {
2148 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2149 CmdHpf("");
2150
2151 int sign = 1;
2152 int zc = 0;
2153 int lastZc = 0;
2154
2155 for (int i = 0; i < GraphTraceLen; ++i) {
2156 if (GraphBuffer[i] * sign >= 0) {
2157 // No change in sign, reproduce the previous sample count.
2158 zc++;
2159 GraphBuffer[i] = lastZc;
2160 } else {
2161 // Change in sign, reset the sample count.
2162 sign = -sign;
2163 GraphBuffer[i] = lastZc;
2164 if (sign > 0) {
2165 lastZc = zc;
2166 zc = 0;
2167 }
2168 }
2169 }
2170
2171 RepaintGraphWindow();
2172 return 0;
2173 }
2174
2175 int usage_data_bin2hex(){
2176 PrintAndLog("Usage: data bin2hex <binary_digits>");
2177 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
2178 return 0;
2179 }
2180
2181 /**
2182 * @brief Utility for conversion via cmdline.
2183 * @param Cmd
2184 * @return
2185 */
2186 int Cmdbin2hex(const char *Cmd)
2187 {
2188 int bg =0, en =0;
2189 if(param_getptr(Cmd, &bg, &en, 0))
2190 {
2191 return usage_data_bin2hex();
2192 }
2193 //Number of digits supplied as argument
2194 size_t length = en - bg +1;
2195 size_t bytelen = (length+7) / 8;
2196 uint8_t* arr = (uint8_t *) malloc(bytelen);
2197 memset(arr, 0, bytelen);
2198 BitstreamOut bout = { arr, 0, 0 };
2199
2200 for(; bg <= en ;bg++)
2201 {
2202 char c = Cmd[bg];
2203 if( c == '1') pushBit(&bout, 1);
2204 else if( c == '0') pushBit(&bout, 0);
2205 else PrintAndLog("Ignoring '%c'", c);
2206 }
2207
2208 if(bout.numbits % 8 != 0)
2209 {
2210 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
2211 }
2212
2213 //Uses printf instead of PrintAndLog since the latter
2214 // adds linebreaks to each printout - this way was more convenient since we don't have to
2215 // allocate a string and write to that first...
2216 for(size_t x = 0; x < bytelen ; x++)
2217 {
2218 printf("%02X", arr[x]);
2219 }
2220 printf("\n");
2221 free(arr);
2222 return 0;
2223 }
2224
2225 int usage_data_hex2bin() {
2226 PrintAndLog("Usage: data hex2bin <hex_digits>");
2227 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
2228 return 0;
2229
2230 }
2231
2232 int Cmdhex2bin(const char *Cmd)
2233 {
2234 int bg =0, en =0;
2235 if(param_getptr(Cmd, &bg, &en, 0))
2236 {
2237 return usage_data_hex2bin();
2238 }
2239
2240
2241 while(bg <= en )
2242 {
2243 char x = Cmd[bg++];
2244 // capitalize
2245 if (x >= 'a' && x <= 'f')
2246 x -= 32;
2247 // convert to numeric value
2248 if (x >= '0' && x <= '9')
2249 x -= '0';
2250 else if (x >= 'A' && x <= 'F')
2251 x -= 'A' - 10;
2252 else
2253 continue;
2254
2255 //Uses printf instead of PrintAndLog since the latter
2256 // adds linebreaks to each printout - this way was more convenient since we don't have to
2257 // allocate a string and write to that first...
2258
2259 for(int i= 0 ; i < 4 ; ++i)
2260 printf("%d",(x >> (3 - i)) & 1);
2261 }
2262 printf("\n");
2263
2264 return 0;
2265 }
2266
2267 static command_t CommandTable[] =
2268 {
2269 {"help", CmdHelp, 1, "This help"},
2270 {"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)"},
2271 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
2272 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking tag from GraphBuffer"},
2273 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
2274 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
2275 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
2276 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
2277 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2278 {"dec", CmdDec, 1, "Decimate samples"},
2279 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
2280 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
2281 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
2282 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
2283 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2284 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2285 {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2286 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
2287 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
2288 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
2289 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
2290 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
2291 {"hide", CmdHide, 1, "Hide graph window"},
2292 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
2293 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2294 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
2295 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
2296 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
2297 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
2298 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
2299 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
2300 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
2301 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
2302 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
2303 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2304 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
2305 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2306 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
2307 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
2308 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
2309 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
2310 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2311 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
2312 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
2313 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
2314 {NULL, NULL, 0, NULL}
2315 };
2316
2317 int CmdData(const char *Cmd)
2318 {
2319 CmdsParse(CommandTable, Cmd);
2320 return 0;
2321 }
2322
2323 int CmdHelp(const char *Cmd)
2324 {
2325 CmdsHelp(CommandTable);
2326 return 0;
2327 }
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