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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 <limits.h> // for CmdNorm INT_MIN && INT_MAX
14 #include "data.h" // also included in util.h
15 #include "cmddata.h"
16 #include "util.h"
17 #include "cmdmain.h"
18 #include "proxmark3.h"
19 #include "ui.h" // for show graph controls
20 #include "graph.h" // for graph data
21 #include "cmdparser.h"// already included in cmdmain.h
22 #include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
23 #include "lfdemod.h" // for demod code
24 #include "crc.h" // for pyramid checksum maxim
25 #include "crc16.h" // for FDXB demod checksum
26 #include "loclass/cipherutils.h" // for decimating samples in getsamples
27
28 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
29 uint8_t g_debugMode=0;
30 size_t DemodBufferLen=0;
31 static int CmdHelp(const char *Cmd);
32
33 int usage_data_printdemodbuf(void){
34 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
35 PrintAndLog("Options:");
36 PrintAndLog(" h This help");
37 PrintAndLog(" x output in hex (omit for binary output)");
38 PrintAndLog(" o <offset> enter offset in # of bits");
39 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
40 return 0;
41 }
42 int usage_data_askem410xdemod(void){
43 PrintAndLog("Usage: data askem410xdemod [clock] <0|1> [maxError]");
44 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
45 PrintAndLog(" <invert>, 1 for invert output");
46 PrintAndLog(" [set maximum allowed errors], default = 100.");
47 PrintAndLog("");
48 PrintAndLog(" sample: data askem410xdemod = demod an EM410x Tag ID from GraphBuffer");
49 PrintAndLog(" : data askem410xdemod 32 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32");
50 PrintAndLog(" : data askem410xdemod 32 1 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32 and inverting data");
51 PrintAndLog(" : data askem410xdemod 1 = demod an EM410x Tag ID from GraphBuffer while inverting data");
52 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");
53 return 0;
54 }
55 int usage_data_manrawdecode(void){
56 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
57 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
58 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
59 PrintAndLog(" [invert] invert output");
60 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
61 PrintAndLog("");
62 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
63 return 0;
64 }
65 int usage_data_biphaserawdecode(void){
66 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
67 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
68 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
69 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
70 PrintAndLog("");
71 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
72 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
73 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
74 PrintAndLog("");
75 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
76 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
77 return 0;
78 }
79 int usage_data_rawdemod(void){
80 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
81 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
82 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
83 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
84 PrintAndLog(" <options> see specific modulation help for optional parameters");
85 PrintAndLog("");
86 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
87 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
88 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
89 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
90 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
91 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
92 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
93 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
94 return 0;
95 }
96 int usage_data_rawdemod_am(void){
97 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
98 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
99 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
100 PrintAndLog(" <invert>, 1 to invert output");
101 PrintAndLog(" [set maximum allowed errors], default = 100");
102 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
103 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
104 PrintAndLog("");
105 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
106 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
107 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
108 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
109 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");
110 return 0;
111 }
112 int usage_data_rawdemod_ab(void){
113 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
114 PrintAndLog(" [offset], offset to begin biphase, default=0");
115 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
116 PrintAndLog(" <invert>, 1 to invert output");
117 PrintAndLog(" [set maximum allowed errors], default = 100");
118 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
119 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
120 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
121 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
122 PrintAndLog(" NOTE: any other arg must have previous args set to work");
123 PrintAndLog("");
124 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
125 PrintAndLog("");
126 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
127 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
128 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
129 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
130 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
131 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");
132 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");
133 return 0;
134 }
135 int usage_data_rawdemod_ar(void){
136 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
137 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
138 PrintAndLog(" <invert>, 1 to invert output");
139 PrintAndLog(" [set maximum allowed errors], default = 100");
140 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
141 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
142 PrintAndLog("");
143 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
144 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
145 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
146 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
147 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
148 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");
149 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");
150 return 0;
151 }
152 int usage_data_rawdemod_fs(void){
153 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
154 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
155 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
156 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
157 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
158 PrintAndLog("");
159 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
160 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
161 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
162 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
163 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
164 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
165 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
166 return 0;
167 }
168 int usage_data_rawdemod_nr(void){
169 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
170 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
171 PrintAndLog(" <invert>, 1 for invert output");
172 PrintAndLog(" [set maximum allowed errors], default = 100.");
173 PrintAndLog("");
174 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
175 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
176 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
177 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
178 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");
179 return 0;
180 }
181 int usage_data_rawdemod_p1(void){
182 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
183 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
184 PrintAndLog(" <invert>, 1 for invert output");
185 PrintAndLog(" [set maximum allowed errors], default = 100.");
186 PrintAndLog("");
187 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
188 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
189 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
190 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
191 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");
192 return 0;
193 }
194 int usage_data_rawdemod_p2(void){
195 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
196 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
197 PrintAndLog(" <invert>, 1 for invert output");
198 PrintAndLog(" [set maximum allowed errors], default = 100.");
199 PrintAndLog("");
200 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
201 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
202 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
203 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
204 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");
205 return 0;
206 }
207 int usage_data_autocorr(void) {
208 PrintAndLog("Usage: data autocorr [window] [g]");
209 PrintAndLog("Options:");
210 PrintAndLog(" h This help");
211 PrintAndLog(" [window] window length for correlation - default = 4000");
212 PrintAndLog(" g save back to GraphBuffer (overwrite)");
213 return 0;
214 }
215 int usage_data_undecimate(void){
216 PrintAndLog("Usage: data undec [factor]");
217 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
218 PrintAndLog("Options: ");
219 PrintAndLog(" h This help");
220 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
221 PrintAndLog("Example: 'data undec 3'");
222 return 0;
223 }
224 int usage_data_detectclock(void){
225 PrintAndLog("Usage: data detectclock [modulation] <clock>");
226 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
227 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
228 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
229 PrintAndLog("");
230 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
231 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
232 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
233 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
234 return 0;
235 }
236 int usage_data_hex2bin(void){
237 PrintAndLog("Usage: data hex2bin <hex_digits>");
238 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
239 return 0;
240 }
241 int usage_data_bin2hex(void){
242 PrintAndLog("Usage: data bin2hex <binary_digits>");
243 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
244 return 0;
245 }
246
247 //set the demod buffer with given array of binary (one bit per byte)
248 //by marshmellow
249 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
250 {
251 if (buff == NULL)
252 return;
253
254 if ( size >= MAX_DEMOD_BUF_LEN)
255 size = MAX_DEMOD_BUF_LEN;
256
257 size_t i = 0;
258 for (; i < size; i++){
259 DemodBuffer[i]=buff[startIdx++];
260 }
261 DemodBufferLen=size;
262 return;
263 }
264
265 int CmdSetDebugMode(const char *Cmd)
266 {
267 int demod=0;
268 sscanf(Cmd, "%i", &demod);
269 g_debugMode=(uint8_t)demod;
270 return 1;
271 }
272
273 //by marshmellow
274 void printDemodBuff(void)
275 {
276 int bitLen = DemodBufferLen;
277 if (bitLen<1) {
278 PrintAndLog("no bits found in demod buffer");
279 return;
280 }
281 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
282
283 char *bin = sprint_bin_break(DemodBuffer, bitLen,16);
284 PrintAndLog("%s",bin);
285
286 return;
287 }
288
289 int CmdPrintDemodBuff(const char *Cmd)
290 {
291 char hex[512]={0x00};
292 bool hexMode = false;
293 bool errors = false;
294 uint32_t offset = 0; //could be size_t but no param_get16...
295 uint32_t length = 512;
296 char cmdp = 0;
297 while(param_getchar(Cmd, cmdp) != 0x00)
298 {
299 switch(param_getchar(Cmd, cmdp))
300 {
301 case 'h':
302 case 'H':
303 return usage_data_printdemodbuf();
304 case 'x':
305 case 'X':
306 hexMode = true;
307 cmdp++;
308 break;
309 case 'o':
310 case 'O':
311 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
312 if (!offset) errors = true;
313 cmdp += 2;
314 break;
315 case 'l':
316 case 'L':
317 length = param_get32ex(Cmd, cmdp+1, 512, 10);
318 if (!length) errors = true;
319 cmdp += 2;
320 break;
321 default:
322 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
323 errors = true;
324 break;
325 }
326 if(errors) break;
327 }
328 //Validations
329 if(errors) return usage_data_printdemodbuf();
330 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
331 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
332
333 if (hexMode){
334 char *buf = (char *) (DemodBuffer + offset);
335 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
336 numBits = binarraytohex(hex, buf, numBits);
337 if (numBits==0) return 0;
338 PrintAndLog("DemodBuffer: %s",hex);
339 } else {
340 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
341 }
342 return 1;
343 }
344
345 //by marshmellow
346 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
347 int CmdGetBitStream(const char *Cmd)
348 {
349 int i;
350 CmdHpf(Cmd);
351 for (i = 0; i < GraphTraceLen; i++) {
352 if (GraphBuffer[i] >= 1) {
353 GraphBuffer[i] = 1;
354 } else {
355 GraphBuffer[i] = 0;
356 }
357 }
358 RepaintGraphWindow();
359 return 0;
360 }
361
362 //by marshmellow
363 //print 64 bit EM410x ID in multiple formats
364 void printEM410x(uint32_t hi, uint64_t id)
365 {
366 if (id || hi){
367 uint64_t iii=1;
368 uint64_t id2lo=0;
369 uint32_t ii=0;
370 uint32_t i=0;
371 for (ii=5; ii>0;ii--){
372 for (i=0;i<8;i++){
373 id2lo=(id2lo<<1LL) | ((id & (iii << (i+((ii-1)*8)))) >> (i+((ii-1)*8)));
374 }
375 }
376 if (hi){
377 //output 88 bit em id
378 PrintAndLog("\nEM TAG ID : %06X%016llX", hi, id);
379 } else{
380 //output 40 bit em id
381 PrintAndLog("\nEM TAG ID : %010llX", id);
382 PrintAndLog("Unique TAG ID : %010llX", id2lo);
383 PrintAndLog("\nPossible de-scramble patterns");
384 PrintAndLog("HoneyWell IdentKey {");
385 PrintAndLog("DEZ 8 : %08lld",id & 0xFFFFFF);
386 PrintAndLog("DEZ 10 : %010lld",id & 0xFFFFFFFF);
387 PrintAndLog("DEZ 5.5 : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
388 PrintAndLog("DEZ 3.5A : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
389 PrintAndLog("DEZ 3.5B : %03lld.%05lld",(id & 0xFF000000) >> 24,(id & 0xFFFF));
390 PrintAndLog("DEZ 3.5C : %03lld.%05lld",(id & 0xFF0000) >> 16,(id & 0xFFFF));
391 PrintAndLog("DEZ 14/IK2 : %014lld",id);
392 PrintAndLog("DEZ 15/IK3 : %015lld",id2lo);
393 PrintAndLog("DEZ 20/ZK : %02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld",
394 (id2lo & 0xf000000000) >> 36,
395 (id2lo & 0x0f00000000) >> 32,
396 (id2lo & 0x00f0000000) >> 28,
397 (id2lo & 0x000f000000) >> 24,
398 (id2lo & 0x0000f00000) >> 20,
399 (id2lo & 0x00000f0000) >> 16,
400 (id2lo & 0x000000f000) >> 12,
401 (id2lo & 0x0000000f00) >> 8,
402 (id2lo & 0x00000000f0) >> 4,
403 (id2lo & 0x000000000f)
404 );
405 uint64_t paxton = (((id>>32) << 24) | (id & 0xffffff)) + 0x143e00;
406 PrintAndLog("}\nOther : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
407 PrintAndLog("Pattern Paxton : %lld [0x%llX]", paxton, paxton);
408
409 uint32_t p1id = (id & 0xFFFFFF);
410 uint8_t arr[32] = {0x00};
411 int i =0;
412 int j = 23;
413 for (; i < 24; ++i, --j ){
414 arr[i] = (p1id >> i) & 1;
415 }
416
417 uint32_t p1 = 0;
418
419 p1 |= arr[23] << 21;
420 p1 |= arr[22] << 23;
421 p1 |= arr[21] << 20;
422 p1 |= arr[20] << 22;
423
424 p1 |= arr[19] << 18;
425 p1 |= arr[18] << 16;
426 p1 |= arr[17] << 19;
427 p1 |= arr[16] << 17;
428
429 p1 |= arr[15] << 13;
430 p1 |= arr[14] << 15;
431 p1 |= arr[13] << 12;
432 p1 |= arr[12] << 14;
433
434 p1 |= arr[11] << 6;
435 p1 |= arr[10] << 2;
436 p1 |= arr[9] << 7;
437 p1 |= arr[8] << 1;
438
439 p1 |= arr[7] << 0;
440 p1 |= arr[6] << 8;
441 p1 |= arr[5] << 11;
442 p1 |= arr[4] << 3;
443
444 p1 |= arr[3] << 10;
445 p1 |= arr[2] << 4;
446 p1 |= arr[1] << 5;
447 p1 |= arr[0] << 9;
448 PrintAndLog("Pattern 1 : %d [0x%X]", p1, p1);
449
450 uint16_t sebury1 = id & 0xFFFF;
451 uint8_t sebury2 = (id >> 16) & 0x7F;
452 uint32_t sebury3 = id & 0x7FFFFF;
453 PrintAndLog("Pattern Sebury : %d %d %d [0x%X 0x%X 0x%X]", sebury1, sebury2, sebury3, sebury1, sebury2, sebury3);
454 }
455 }
456 return;
457 }
458
459 int AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )
460 {
461 size_t idx = 0;
462 size_t BitLen = DemodBufferLen;
463 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
464 memcpy(BitStream, DemodBuffer, BitLen);
465 if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)){
466 //set GraphBuffer for clone or sim command
467 setDemodBuf(BitStream, BitLen, idx);
468 if (g_debugMode){
469 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
470 printDemodBuff();
471 }
472 if (verbose){
473 PrintAndLog("EM410x pattern found: ");
474 printEM410x(*hi, *lo);
475 }
476 return 1;
477 }
478 return 0;
479 }
480
481 int AskEm410xDemod(const char *Cmd, uint32_t *hi, uint64_t *lo, bool verbose)
482 {
483 bool st = TRUE;
484 if (!ASKDemod_ext(Cmd, FALSE, FALSE, 1, &st)) return 0;
485 return AskEm410xDecode(verbose, hi, lo);
486 }
487
488 //by marshmellow
489 //takes 3 arguments - clock, invert and maxErr as integers
490 //attempts to demodulate ask while decoding manchester
491 //prints binary found and saves in graphbuffer for further commands
492 int CmdAskEM410xDemod(const char *Cmd)
493 {
494 char cmdp = param_getchar(Cmd, 0);
495 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H')
496 return usage_data_askem410xdemod();
497
498 uint64_t lo = 0;
499 uint32_t hi = 0;
500 return AskEm410xDemod(Cmd, &hi, &lo, true);
501 }
502
503 //by marshmellow
504 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
505 // (amp may not be needed anymore)
506 //verbose will print results and demoding messages
507 //emSearch will auto search for EM410x format in bitstream
508 //askType switches decode: ask/raw = 0, ask/manchester = 1
509 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
510 int invert=0;
511 int clk=0;
512 int maxErr=100;
513 int maxLen=0;
514 uint8_t askAmp = 0;
515 char amp = param_getchar(Cmd, 0);
516 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
517 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
518 if (!maxLen) maxLen = BIGBUF_SIZE;
519 if (invert != 0 && invert != 1) {
520 PrintAndLog("Invalid argument: %s", Cmd);
521 return 0;
522 }
523 if (clk==1){
524 invert=1;
525 clk=0;
526 }
527 if (amp == 'a' || amp == 'A') askAmp=1;
528 size_t BitLen = getFromGraphBuf(BitStream);
529 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
530 if (BitLen<255) return 0;
531 if (maxLen<BitLen && maxLen != 0) BitLen = maxLen;
532 int foundclk = 0;
533 bool st = false;
534 if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk);
535 if (st) {
536 *stCheck = st;
537 clk = (clk == 0) ? foundclk : clk;
538 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator");
539 }
540 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askAmp, askType);
541 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
542 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
543 return 0;
544 }
545 if (errCnt>maxErr){
546 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
547 return 0;
548 }
549 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
550
551 //output
552 setDemodBuf(BitStream,BitLen,0);
553 if (verbose || g_debugMode){
554 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
555 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
556 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
557 // Now output the bitstream to the scrollback by line of 16 bits
558 printDemodBuff();
559
560 }
561 uint64_t lo = 0;
562 uint32_t hi = 0;
563 if (emSearch){
564 AskEm410xDecode(true, &hi, &lo);
565 }
566 return 1;
567 }
568 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
569 bool st = false;
570 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
571 }
572
573 //by marshmellow
574 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
575 //attempts to demodulate ask while decoding manchester
576 //prints binary found and saves in graphbuffer for further commands
577 int Cmdaskmandemod(const char *Cmd)
578 {
579 char cmdp = param_getchar(Cmd, 0);
580 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H')
581 return usage_data_rawdemod_am();
582
583 bool st = TRUE;
584 if (Cmd[0]=='s')
585 return ASKDemod_ext(Cmd++, TRUE, TRUE, 1, &st);
586 else if (Cmd[1] == 's')
587 return ASKDemod_ext(Cmd+=2, TRUE, TRUE, 1, &st);
588 else
589 return ASKDemod(Cmd, TRUE, TRUE, 1);
590 }
591
592 //by marshmellow
593 //manchester decode
594 //stricktly take 10 and 01 and convert to 0 and 1
595 int Cmdmandecoderaw(const char *Cmd)
596 {
597 int i =0;
598 int errCnt=0;
599 size_t size=0;
600 int invert=0;
601 int maxErr = 20;
602 char cmdp = param_getchar(Cmd, 0);
603 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H')
604 return usage_data_manrawdecode();
605
606 if (DemodBufferLen==0) return 0;
607 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
608 int high=0,low=0;
609 for (;i<DemodBufferLen;++i){
610 if (DemodBuffer[i]>high) high=DemodBuffer[i];
611 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
612 BitStream[i]=DemodBuffer[i];
613 }
614 if (high>7 || low <0 ){
615 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
616 return 0;
617 }
618
619 sscanf(Cmd, "%i %i", &invert, &maxErr);
620 size=i;
621 errCnt=manrawdecode(BitStream, &size, invert);
622 if (errCnt>=maxErr){
623 PrintAndLog("Too many errors: %d",errCnt);
624 return 0;
625 }
626 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
627 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
628 if (errCnt==0){
629 uint64_t id = 0;
630 uint32_t hi = 0;
631 size_t idx=0;
632 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
633 //need to adjust to set bitstream back to manchester encoded data
634 //setDemodBuf(BitStream, size, idx);
635
636 printEM410x(hi, id);
637 }
638 }
639 return 1;
640 }
641
642 //by marshmellow
643 //biphase decode
644 //take 01 or 10 = 0 and 11 or 00 = 1
645 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
646 // and "invert" default = 0 if 1 it will invert output
647 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
648 int CmdBiphaseDecodeRaw(const char *Cmd)
649 {
650 size_t size=0;
651 int offset=0, invert=0, maxErr=20, errCnt=0;
652 char cmdp = param_getchar(Cmd, 0);
653 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H')
654 return usage_data_biphaserawdecode();
655
656 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
657 if (DemodBufferLen==0){
658 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
659 return 0;
660 }
661 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
662 memcpy(BitStream, DemodBuffer, DemodBufferLen);
663 size = DemodBufferLen;
664 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
665 if (errCnt<0){
666 PrintAndLog("Error during decode:%d", errCnt);
667 return 0;
668 }
669 if (errCnt>maxErr){
670 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
671 return 0;
672 }
673
674 if (errCnt>0){
675 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
676 }
677 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
678 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
679
680 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
681 return 1;
682 }
683
684 //by marshmellow
685 // - ASK Demod then Biphase decode GraphBuffer samples
686 int ASKbiphaseDemod(const char *Cmd, bool verbose)
687 {
688 //ask raw demod GraphBuffer first
689 int offset=0, clk=0, invert=0, maxErr=0;
690 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
691
692 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
693 size_t size = getFromGraphBuf(BitStream);
694 if (size == 0 ) {
695 if (g_debugMode) PrintAndLog("DEBUG: no data in graphbuf");
696 return 0;
697 }
698 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
699 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
700 if ( errCnt < 0 || errCnt > maxErr ) {
701 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
702 return 0;
703 }
704
705 //attempt to Biphase decode BitStream
706 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
707 if (errCnt < 0){
708 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
709 return 0;
710 }
711 if (errCnt > maxErr) {
712 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
713 return 0;
714 }
715 //success set DemodBuffer and return
716 setDemodBuf(BitStream, size, 0);
717 if (g_debugMode || verbose){
718 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
719 printDemodBuff();
720 }
721 return 1;
722 }
723 //by marshmellow - see ASKbiphaseDemod
724 int Cmdaskbiphdemod(const char *Cmd)
725 {
726 char cmdp = param_getchar(Cmd, 0);
727 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H')
728 return usage_data_rawdemod_ab();
729
730 return ASKbiphaseDemod(Cmd, TRUE);
731 }
732
733 //by marshmellow
734 //attempts to demodulate and identify a G_Prox_II verex/chubb card
735 //WARNING: if it fails during some points it will destroy the DemodBuffer data
736 // but will leave the GraphBuffer intact.
737 //if successful it will push askraw data back to demod buffer ready for emulation
738 int CmdG_Prox_II_Demod(const char *Cmd)
739 {
740 if (!ASKbiphaseDemod(Cmd, FALSE)){
741 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
742 return 0;
743 }
744 size_t size = DemodBufferLen;
745 //call lfdemod.c demod for gProxII
746 int ans = gProxII_Demod(DemodBuffer, &size);
747 if (ans < 0){
748 if (g_debugMode) PrintAndLog("Error gProxII_Demod");
749 return 0;
750 }
751 //got a good demod of 96 bits
752 uint8_t ByteStream[8] = {0x00};
753 uint8_t xorKey=0;
754 size_t startIdx = ans + 6; //start after 6 bit preamble
755
756 uint8_t bits_no_spacer[90];
757 //so as to not mess with raw DemodBuffer copy to a new sample array
758 memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
759 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
760 size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
761 if (bitLen != 72) {
762 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
763 return 0;
764 }
765 // get key and then get all 8 bytes of payload decoded
766 xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
767 for (size_t idx = 0; idx < 8; idx++) {
768 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
769 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
770 }
771 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
772 //
773 uint8_t fmtLen = ByteStream[0]>>2;
774 uint32_t FC = 0;
775 uint32_t Card = 0;
776 //get raw 96 bits to print
777 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
778 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
779 uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
780
781 if (fmtLen==36){
782 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
783 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
784 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
785 } else if(fmtLen==26){
786 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
787 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
788 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
789 } else {
790 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
791 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8));
792 }
793 PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
794 setDemodBuf(DemodBuffer+ans, 96, 0);
795 return 1;
796 }
797
798 //by marshmellow
799 //see ASKDemod for what args are accepted
800 int CmdVikingDemod(const char *Cmd)
801 {
802 if (!ASKDemod(Cmd, false, false, 1)) {
803 if (g_debugMode) PrintAndLog("ASKDemod failed");
804 return 0;
805 }
806 size_t size = DemodBufferLen;
807 //call lfdemod.c demod for Viking
808 int ans = VikingDemod_AM(DemodBuffer, &size);
809 if (ans < 0) {
810 if (g_debugMode) PrintAndLog("Error Viking_Demod %d %s", ans, (ans == -5)?"[chksum error]":"");
811 return 0;
812 }
813 //got a good demod
814 uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
815 uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
816 uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
817 uint8_t checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
818 PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, checksum);
819 PrintAndLog("Raw: %08X%08X", raw1,raw2);
820 setDemodBuf(DemodBuffer+ans, 64, 0);
821 return 1;
822 }
823
824 //by marshmellow - see ASKDemod
825 int Cmdaskrawdemod(const char *Cmd)
826 {
827 char cmdp = param_getchar(Cmd, 0);
828 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H')
829 return usage_data_rawdemod_ar();
830
831 return ASKDemod(Cmd, TRUE, FALSE, 0);
832 }
833
834 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
835 {
836 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
837 size_t Correlation = 0;
838 int maxSum = 0;
839 int lastMax = 0;
840 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
841 for (int i = 0; i < GraphTraceLen - window; ++i) {
842 int sum = 0;
843 for (int j = 0; j < window; ++j) {
844 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
845 }
846 CorrelBuffer[i] = sum;
847 if (sum >= maxSum-100 && sum <= maxSum+100){
848 //another max
849 Correlation = i-lastMax;
850 lastMax = i;
851 if (sum > maxSum) maxSum = sum;
852 } else if (sum > maxSum){
853 maxSum=sum;
854 lastMax = i;
855 }
856 }
857 if (Correlation==0){
858 //try again with wider margin
859 for (int i = 0; i < GraphTraceLen - window; i++){
860 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
861 //another max
862 Correlation = i-lastMax;
863 lastMax = i;
864 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
865 }
866 }
867 }
868 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
869
870 if (SaveGrph){
871 GraphTraceLen = GraphTraceLen - window;
872 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
873 RepaintGraphWindow();
874 }
875 return Correlation;
876 }
877
878 int CmdAutoCorr(const char *Cmd)
879 {
880 char cmdp = param_getchar(Cmd, 0);
881 if (cmdp == 'h' || cmdp == 'H') return usage_data_autocorr();
882 int window = 4000; //set default
883 char grph=0;
884 bool updateGrph = FALSE;
885 sscanf(Cmd, "%i %c", &window, &grph);
886
887 if (window >= GraphTraceLen) {
888 PrintAndLog("window must be smaller than trace (%d samples)",
889 GraphTraceLen);
890 return 0;
891 }
892 if (grph == 'g') updateGrph=TRUE;
893 return AutoCorrelate(window, updateGrph, TRUE);
894 }
895
896 int CmdBitsamples(const char *Cmd)
897 {
898 int cnt = 0;
899 uint8_t got[12288];
900
901 GetFromBigBuf(got, sizeof(got), 0);
902 WaitForResponse(CMD_ACK, NULL);
903
904 for (int j = 0; j < sizeof(got); j++) {
905 for (int k = 0; k < 8; k++) {
906 if(got[j] & (1 << (7 - k))) {
907 GraphBuffer[cnt++] = 1;
908 } else {
909 GraphBuffer[cnt++] = 0;
910 }
911 }
912 }
913 GraphTraceLen = cnt;
914 RepaintGraphWindow();
915 return 0;
916 }
917
918 int CmdBuffClear(const char *Cmd)
919 {
920 UsbCommand c = {CMD_BUFF_CLEAR, {0,0,0}};
921 SendCommand(&c);
922 ClearGraph(true);
923 return 0;
924 }
925
926 int CmdDec(const char *Cmd)
927 {
928 for (int i = 0; i < (GraphTraceLen >> 2); ++i)
929 GraphBuffer[i] = GraphBuffer[i * 2];
930
931 GraphTraceLen >>= 2;
932 PrintAndLog("decimated by 2");
933 RepaintGraphWindow();
934 return 0;
935 }
936 /**
937 * Undecimate - I'd call it 'interpolate', but we'll save that
938 * name until someone does an actual interpolation command, not just
939 * blindly repeating samples
940 * @param Cmd
941 * @return
942 */
943 int CmdUndec(const char *Cmd)
944 {
945 char cmdp = param_getchar(Cmd, 0);
946 if (cmdp == 'h' || cmdp == 'H')
947 return usage_data_undecimate();
948
949 uint8_t factor = param_get8ex(Cmd, 0, 2, 10);
950
951 //We have memory, don't we?
952 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
953 uint32_t g_index = 0 ,s_index = 0;
954 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
955 {
956 int count = 0;
957 for (count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
958 swap[s_index+count] = GraphBuffer[g_index];
959 s_index += count;
960 g_index++;
961 }
962
963 memcpy(GraphBuffer, swap, s_index * sizeof(int));
964 GraphTraceLen = s_index;
965 RepaintGraphWindow();
966 return 0;
967 }
968
969 //by marshmellow
970 //shift graph zero up or down based on input + or -
971 int CmdGraphShiftZero(const char *Cmd)
972 {
973 int shift=0;
974 //set options from parameters entered with the command
975 sscanf(Cmd, "%i", &shift);
976 int shiftedVal=0;
977 for(int i = 0; i<GraphTraceLen; i++){
978 shiftedVal=GraphBuffer[i]+shift;
979 if (shiftedVal>127)
980 shiftedVal=127;
981 else if (shiftedVal<-127)
982 shiftedVal=-127;
983 GraphBuffer[i]= shiftedVal;
984 }
985 CmdNorm("");
986 return 0;
987 }
988
989 //by marshmellow
990 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
991 //similar to dirtheshold, threshold commands
992 //takes a threshold length which is the measured length between two samples then determines an edge
993 int CmdAskEdgeDetect(const char *Cmd)
994 {
995 int thresLen = 25;
996 int last = 0;
997 sscanf(Cmd, "%i", &thresLen);
998
999 for(int i = 1; i < GraphTraceLen; ++i){
1000 if (GraphBuffer[i] - GraphBuffer[i-1] >= thresLen) //large jump up
1001 last = 127;
1002 else if(GraphBuffer[i] - GraphBuffer[i-1] <= -1 * thresLen) //large jump down
1003 last = -127;
1004
1005 GraphBuffer[i-1] = last;
1006 }
1007 RepaintGraphWindow();
1008 return 0;
1009 }
1010
1011 /* Print our clock rate */
1012 // uses data from graphbuffer
1013 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
1014 int CmdDetectClockRate(const char *Cmd)
1015 {
1016 char cmdp = param_getchar(Cmd, 0);
1017 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H')
1018 return usage_data_detectclock();
1019
1020 int ans = 0;
1021 switch ( cmdp ) {
1022 case 'a' :
1023 case 'A' :
1024 ans = GetAskClock(Cmd+1, true, false);
1025 break;
1026 case 'f' :
1027 case 'F' :
1028 ans = GetFskClock("", true, false);
1029 break;
1030 case 'n' :
1031 case 'N' :
1032 ans = GetNrzClock("", true, false);
1033 break;
1034 case 'p' :
1035 case 'P' :
1036 ans = GetPskClock("", true, false);
1037 break;
1038 default :
1039 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
1040 break;
1041 }
1042 return ans;
1043 }
1044
1045 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
1046 {
1047 static char fType[8];
1048 memset(fType, 0x00, 8);
1049 char *fskType = fType;
1050 if (fchigh==10 && fclow==8){
1051 if (invert) //fsk2a
1052 memcpy(fskType, "FSK2a", 5);
1053 else //fsk2
1054 memcpy(fskType, "FSK2", 4);
1055 } else if (fchigh == 8 && fclow == 5) {
1056 if (invert)
1057 memcpy(fskType, "FSK1", 4);
1058 else
1059 memcpy(fskType, "FSK1a", 5);
1060 } else {
1061 memcpy(fskType, "FSK??", 5);
1062 }
1063 return fskType;
1064 }
1065
1066 //by marshmellow
1067 //fsk raw demod and print binary
1068 //takes 4 arguments - Clock, invert, fchigh, fclow
1069 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
1070 int FSKrawDemod(const char *Cmd, bool verbose)
1071 {
1072 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1073 uint8_t rfLen, invert, fchigh, fclow;
1074
1075 //set defaults
1076 //set options from parameters entered with the command
1077 rfLen = param_get8(Cmd, 0);
1078 invert = param_get8(Cmd, 1);
1079 fchigh = param_get8(Cmd, 2);
1080 fclow = param_get8(Cmd, 3);
1081 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
1082 if (rfLen==1) {
1083 invert = 1; //if invert option only is used
1084 rfLen = 0;
1085 }
1086 }
1087
1088 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1089 size_t BitLen = getFromGraphBuf(BitStream);
1090 if (BitLen==0) return 0;
1091 //get field clock lengths
1092 uint16_t fcs=0;
1093 if (!fchigh || !fclow) {
1094 fcs = countFC(BitStream, BitLen, 1);
1095 if (!fcs) {
1096 fchigh = 10;
1097 fclow = 8;
1098 } else {
1099 fchigh = (fcs >> 8) & 0x00FF;
1100 fclow = fcs & 0x00FF;
1101 }
1102 }
1103 //get bit clock length
1104 if (!rfLen) {
1105 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
1106 if (!rfLen) rfLen = 50;
1107 }
1108 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
1109 if (size > 0) {
1110 setDemodBuf(BitStream, size, 0);
1111
1112 // Now output the bitstream to the scrollback by line of 16 bits
1113 if (verbose || g_debugMode) {
1114 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
1115 PrintAndLog("%s decoded bitstream:", GetFSKType(fchigh, fclow, invert));
1116 printDemodBuff();
1117 }
1118
1119 return 1;
1120 } else {
1121 if (g_debugMode) PrintAndLog("no FSK data found");
1122 }
1123 return 0;
1124 }
1125
1126 //by marshmellow
1127 //fsk raw demod and print binary
1128 //takes 4 arguments - Clock, invert, fchigh, fclow
1129 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
1130 int CmdFSKrawdemod(const char *Cmd)
1131 {
1132 char cmdp = param_getchar(Cmd, 0);
1133 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H')
1134 return usage_data_rawdemod_fs();
1135
1136 return FSKrawDemod(Cmd, TRUE);
1137 }
1138
1139 //by marshmellow (based on existing demod + holiman's refactor)
1140 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
1141 //print full HID Prox ID and some bit format details if found
1142 int CmdFSKdemodHID(const char *Cmd)
1143 {
1144 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1145 uint32_t hi2=0, hi=0, lo=0;
1146
1147 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1148 size_t BitLen = getFromGraphBuf(BitStream);
1149 if (BitLen==0) return 0;
1150 //get binary from fsk wave
1151 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1152 if (idx<0){
1153 if (g_debugMode){
1154 if (idx==-1){
1155 PrintAndLog("DEBUG: Just Noise Detected");
1156 } else if (idx == -2) {
1157 PrintAndLog("DEBUG: Error demoding fsk");
1158 } else if (idx == -3) {
1159 PrintAndLog("DEBUG: Preamble not found");
1160 } else if (idx == -4) {
1161 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
1162 } else {
1163 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1164 }
1165 }
1166 return 0;
1167 }
1168 if (hi2==0 && hi==0 && lo==0) {
1169 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
1170 return 0;
1171 }
1172 if (hi2 != 0){ //extra large HID tags
1173 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
1174 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
1175 }
1176 else { //standard HID tags <38 bits
1177 uint8_t fmtLen = 0;
1178 uint32_t fc = 0;
1179 uint32_t cardnum = 0;
1180 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
1181 uint32_t lo2=0;
1182 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
1183 uint8_t idx3 = 1;
1184 while(lo2>1){ //find last bit set to 1 (format len bit)
1185 lo2=lo2>>1;
1186 idx3++;
1187 }
1188 fmtLen =idx3+19;
1189 fc =0;
1190 cardnum=0;
1191 if(fmtLen==26){
1192 cardnum = (lo>>1)&0xFFFF;
1193 fc = (lo>>17)&0xFF;
1194 }
1195 if(fmtLen==34){
1196 cardnum = (lo>>1)&0xFFFF;
1197 fc= ((hi&1)<<15)|(lo>>17);
1198 }
1199 if(fmtLen==35){
1200 cardnum = (lo>>1)&0xFFFFF;
1201 fc = ((hi&1)<<11)|(lo>>21);
1202 }
1203 }
1204 else { //if bit 38 is not set then 37 bit format is used
1205 fmtLen = 37;
1206 fc = 0;
1207 cardnum = 0;
1208 if(fmtLen == 37){
1209 cardnum = (lo>>1)&0x7FFFF;
1210 fc = ((hi&0xF)<<12)|(lo>>20);
1211 }
1212 }
1213 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
1214 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
1215 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
1216 }
1217 setDemodBuf(BitStream,BitLen,idx);
1218 if (g_debugMode){
1219 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
1220 printDemodBuff();
1221 }
1222 return 1;
1223 }
1224
1225 //by marshmellow
1226 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
1227 //print full Paradox Prox ID and some bit format details if found
1228 int CmdFSKdemodParadox(const char *Cmd)
1229 {
1230 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1231 uint32_t hi2=0, hi=0, lo=0;
1232
1233 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1234 size_t BitLen = getFromGraphBuf(BitStream);
1235 if (BitLen==0) return 0;
1236 //get binary from fsk wave
1237 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
1238 if (idx<0){
1239 if (g_debugMode){
1240 if (idx==-1){
1241 PrintAndLog("DEBUG: Just Noise Detected");
1242 } else if (idx == -2) {
1243 PrintAndLog("DEBUG: Error demoding fsk");
1244 } else if (idx == -3) {
1245 PrintAndLog("DEBUG: Preamble not found");
1246 } else if (idx == -4) {
1247 PrintAndLog("DEBUG: Error in Manchester data");
1248 } else {
1249 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1250 }
1251 }
1252 return 0;
1253 }
1254 if (hi2==0 && hi==0 && lo==0){
1255 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1256 return 0;
1257 }
1258 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1259 uint32_t cardnum = (lo>>10)&0xFFFF;
1260 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1261 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1262 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1263
1264 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1265 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
1266 setDemodBuf(BitStream,BitLen,idx);
1267 if (g_debugMode){
1268 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1269 printDemodBuff();
1270 }
1271 return 1;
1272 }
1273
1274 //by marshmellow
1275 //IO-Prox demod - FSK RF/64 with preamble of 000000001
1276 //print ioprox ID and some format details
1277 int CmdFSKdemodIO(const char *Cmd)
1278 {
1279 int idx=0;
1280 //something in graphbuffer?
1281 if (GraphTraceLen < 65) {
1282 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1283 return 0;
1284 }
1285 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1286 size_t BitLen = getFromGraphBuf(BitStream);
1287 if (BitLen==0) return 0;
1288
1289 //get binary from fsk wave
1290 idx = IOdemodFSK(BitStream,BitLen);
1291 if (idx<0){
1292 if (g_debugMode){
1293 if (idx==-1){
1294 PrintAndLog("DEBUG: Just Noise Detected");
1295 } else if (idx == -2) {
1296 PrintAndLog("DEBUG: not enough samples");
1297 } else if (idx == -3) {
1298 PrintAndLog("DEBUG: error during fskdemod");
1299 } else if (idx == -4) {
1300 PrintAndLog("DEBUG: Preamble not found");
1301 } else if (idx == -5) {
1302 PrintAndLog("DEBUG: Separator bits not found");
1303 } else {
1304 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1305 }
1306 }
1307 return 0;
1308 }
1309 if (idx==0){
1310 if (g_debugMode){
1311 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1312 if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
1313 }
1314 return 0;
1315 }
1316 //Index map
1317 //0 10 20 30 40 50 60
1318 //| | | | | | |
1319 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1320 //-----------------------------------------------------------------------------
1321 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1322 //
1323 //XSF(version)facility:codeone+codetwo (raw)
1324 //Handle the data
1325 if (idx+64>BitLen) {
1326 if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1327 return 0;
1328 }
1329 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]);
1330 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]);
1331 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]);
1332 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]);
1333 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]);
1334 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]);
1335 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]);
1336
1337 uint32_t code = bytebits_to_byte(BitStream+idx,32);
1338 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
1339 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1340 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
1341 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
1342 uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
1343 uint16_t calccrc = 0;
1344
1345 for (uint8_t i=1; i<6; ++i){
1346 calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
1347 }
1348 calccrc &= 0xff;
1349 calccrc = 0xff - calccrc;
1350
1351 char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
1352
1353 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
1354 setDemodBuf(BitStream,64,idx);
1355 if (g_debugMode){
1356 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1357 printDemodBuff();
1358 }
1359 return 1;
1360 }
1361
1362 //by marshmellow
1363 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1364 //print full AWID Prox ID and some bit format details if found
1365 int CmdFSKdemodAWID(const char *Cmd)
1366 {
1367 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1368 size_t size = getFromGraphBuf(BitStream);
1369 if (size==0) return 0;
1370
1371 //get binary from fsk wave
1372 int idx = AWIDdemodFSK(BitStream, &size);
1373 if (idx<=0){
1374 if (g_debugMode){
1375 if (idx == -1)
1376 PrintAndLog("DEBUG: Error - not enough samples");
1377 else if (idx == -2)
1378 PrintAndLog("DEBUG: Error - only noise found");
1379 else if (idx == -3)
1380 PrintAndLog("DEBUG: Error - problem during FSK demod");
1381 else if (idx == -4)
1382 PrintAndLog("DEBUG: Error - AWID preamble not found");
1383 else if (idx == -5)
1384 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1385 else
1386 PrintAndLog("DEBUG: Error %d",idx);
1387 }
1388 return 0;
1389 }
1390
1391 // Index map
1392 // 0 10 20 30 40 50 60
1393 // | | | | | | |
1394 // 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
1395 // -----------------------------------------------------------------------------
1396 // 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
1397 // 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
1398 // |---26 bit---| |-----117----||-------------142-------------|
1399 // b = format bit len, o = odd parity of last 3 bits
1400 // f = facility code, c = card number
1401 // w = wiegand parity
1402 // (26 bit format shown)
1403
1404 //get raw ID before removing parities
1405 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1406 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1407 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1408 setDemodBuf(BitStream,96,idx);
1409
1410 size = removeParity(BitStream, idx+8, 4, 1, 88);
1411 if (size != 66){
1412 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1413 return 0;
1414 }
1415 // ok valid card found!
1416
1417 // Index map
1418 // 0 10 20 30 40 50 60
1419 // | | | | | | |
1420 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1421 // -----------------------------------------------------------------------------
1422 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1423 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1424 // |26 bit| |-117--| |-----142------|
1425 //
1426 // 00110010 0 0000111110100000 00000000000100010010100010000111 1 000000000
1427 // bbbbbbbb w ffffffffffffffff cccccccccccccccccccccccccccccccc w xxxxxxxxx
1428 // |50 bit| |----4000------| |-----------2248975------------|
1429 // b = format bit len, o = odd parity of last 3 bits
1430 // f = facility code, c = card number
1431 // w = wiegand parity
1432
1433 uint32_t fc = 0;
1434 uint32_t cardnum = 0;
1435 uint32_t code1 = 0;
1436 uint32_t code2 = 0;
1437 uint8_t fmtLen = bytebits_to_byte(BitStream, 8);
1438 switch(fmtLen) {
1439 case 26:
1440 fc = bytebits_to_byte(BitStream + 9, 8);
1441 cardnum = bytebits_to_byte(BitStream + 17, 16);
1442 code1 = bytebits_to_byte(BitStream + 8,fmtLen);
1443 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %u - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1444 break;
1445 case 50:
1446 fc = bytebits_to_byte(BitStream + 9, 16);
1447 cardnum = bytebits_to_byte(BitStream + 25, 32);
1448 code1 = bytebits_to_byte(BitStream + 8, (fmtLen-32) );
1449 code2 = bytebits_to_byte(BitStream + 8 + (fmtLen-32), 32);
1450 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %u - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1451 break;
1452 default:
1453 if (fmtLen > 32 ) {
1454 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1455 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1456 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
1457 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%u) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1458 } else {
1459 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1460 code1 = bytebits_to_byte(BitStream+8,fmtLen);
1461 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%u) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1462 }
1463 break;
1464 }
1465
1466 if (g_debugMode){
1467 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1468 printDemodBuff();
1469 }
1470 return 1;
1471 }
1472
1473 //by marshmellow
1474 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1475 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1476 int CmdFSKdemodPyramid(const char *Cmd)
1477 {
1478 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1479 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1480 size_t size = getFromGraphBuf(BitStream);
1481 if (size==0) return 0;
1482
1483 //get binary from fsk wave
1484 int idx = PyramiddemodFSK(BitStream, &size);
1485 if (idx < 0){
1486 if (g_debugMode){
1487 if (idx == -5)
1488 PrintAndLog("DEBUG: Error - not enough samples");
1489 else if (idx == -1)
1490 PrintAndLog("DEBUG: Error - only noise found");
1491 else if (idx == -2)
1492 PrintAndLog("DEBUG: Error - problem during FSK demod");
1493 else if (idx == -3)
1494 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1495 else if (idx == -4)
1496 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1497 else
1498 PrintAndLog("DEBUG: Error - idx: %d",idx);
1499 }
1500 return 0;
1501 }
1502 // Index map
1503 // 0 10 20 30 40 50 60
1504 // | | | | | | |
1505 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1506 // -----------------------------------------------------------------------------
1507 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1508 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1509
1510 // 64 70 80 90 100 110 120
1511 // | | | | | | |
1512 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1513 // -----------------------------------------------------------------------------
1514 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1515 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1516 // |---115---||---------71---------|
1517 // s = format start bit, o = odd parity of last 7 bits
1518 // f = facility code, c = card number
1519 // w = wiegand parity, x = extra space for other formats
1520 // p = CRC8maxim checksum
1521 // (26 bit format shown)
1522
1523 //get bytes for checksum calc
1524 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
1525 uint8_t csBuff[14] = {0x00};
1526 for (uint8_t i = 0; i < 13; i++){
1527 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
1528 }
1529 //check checksum calc
1530 //checksum calc thanks to ICEMAN!!
1531 uint32_t checkCS = CRC8Maxim(csBuff,13);
1532
1533 //get raw ID before removing parities
1534 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1535 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1536 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1537 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
1538 setDemodBuf(BitStream,128,idx);
1539
1540 size = removeParity(BitStream, idx+8, 8, 1, 120);
1541 if (size != 105){
1542 if (g_debugMode)
1543 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1544 return 0;
1545 }
1546
1547 // ok valid card found!
1548
1549 // Index map
1550 // 0 10 20 30 40 50 60 70
1551 // | | | | | | | |
1552 // 01234567890123456789012345678901234567890123456789012345678901234567890
1553 // -----------------------------------------------------------------------
1554 // 00000000000000000000000000000000000000000000000000000000000000000000000
1555 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1556
1557 // 71 80 90 100
1558 // | | | |
1559 // 1 2 34567890 1234567890123456 7 8901234
1560 // ---------------------------------------
1561 // 1 1 01110011 0000000001000110 0 1001010
1562 // s w ffffffff cccccccccccccccc w ppppppp
1563 // |--115-| |------71------|
1564 // s = format start bit, o = odd parity of last 7 bits
1565 // f = facility code, c = card number
1566 // w = wiegand parity, x = extra space for other formats
1567 // p = CRC8-Maxim checksum
1568 // (26 bit format shown)
1569
1570 //find start bit to get fmtLen
1571 int j;
1572 for (j=0; j < size; ++j){
1573 if(BitStream[j]) break;
1574 }
1575
1576 uint8_t fmtLen = size-j-8;
1577 uint32_t fc = 0;
1578 uint32_t cardnum = 0;
1579 uint32_t code1 = 0;
1580
1581 if ( fmtLen == 26 ){
1582 fc = bytebits_to_byte(BitStream+73, 8);
1583 cardnum = bytebits_to_byte(BitStream+81, 16);
1584 code1 = bytebits_to_byte(BitStream+72,fmtLen);
1585 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);
1586 } else if (fmtLen == 45) {
1587 fmtLen = 42; //end = 10 bits not 7 like 26 bit fmt
1588 fc = bytebits_to_byte(BitStream+53, 10);
1589 cardnum = bytebits_to_byte(BitStream+63, 32);
1590 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1591 } else {
1592 cardnum = bytebits_to_byte(BitStream+81, 16);
1593 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1594 }
1595 if (checksum == checkCS)
1596 PrintAndLog("Checksum %02x passed", checksum);
1597 else
1598 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
1599
1600 if (g_debugMode){
1601 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1602 printDemodBuff();
1603 }
1604 return 1;
1605 }
1606
1607 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
1608 // 8 databits + 1 parity (1)
1609 // CIITT 16 chksum
1610 // NATIONAL CODE, ICAR database
1611 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
1612 // FLAG (animal/non-animal)
1613 /*
1614 38 IDbits
1615 10 country code
1616 1 extra app bit
1617 14 reserved bits
1618 1 animal bit
1619 16 ccitt CRC chksum over 64bit ID CODE.
1620 24 appli bits.
1621
1622 -- sample: 985121004515220 [ 37FF65B88EF94 ]
1623 */
1624 int CmdFDXBdemodBI(const char *Cmd){
1625
1626 int invert = 1;
1627 int clk = 32;
1628 int errCnt = 0;
1629 int maxErr = 0;
1630 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
1631 size_t size = getFromGraphBuf(BitStream);
1632
1633 errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
1634 if ( errCnt < 0 || errCnt > maxErr ) {
1635 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
1636 return 0;
1637 }
1638
1639 errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
1640 if (errCnt < 0 || errCnt > maxErr ) {
1641 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
1642 return 0;
1643 }
1644
1645 int preambleIndex = FDXBdemodBI(BitStream, &size);
1646 if (preambleIndex < 0){
1647 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
1648 return 0;
1649 }
1650 if (size != 128) {
1651 if (g_debugMode) PrintAndLog("Error incorrect data length found");
1652 return 0;
1653 }
1654
1655 setDemodBuf(BitStream, 128, preambleIndex);
1656
1657 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
1658 size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
1659 if ( size != 104 ) {
1660 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
1661 return 0;
1662 }
1663 if (g_debugMode) {
1664 char *bin = sprint_bin_break(BitStream,size,16);
1665 PrintAndLog("DEBUG BinStream:\n%s",bin);
1666 }
1667 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
1668 if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
1669
1670 //got a good demod
1671 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
1672 uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
1673 uint8_t dataBlockBit = BitStream[48];
1674 uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
1675 uint8_t animalBit = BitStream[63];
1676 uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
1677 uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
1678
1679 uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
1680 uint8_t raw[8];
1681 num_to_bytes(rawid, 8, raw);
1682
1683 if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
1684
1685 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
1686 PrintAndLog("Animal ID: %04u-%012llu", countryCode, NationalCode);
1687 PrintAndLog("National Code: %012llu", NationalCode);
1688 PrintAndLog("CountryCode: %04u", countryCode);
1689 PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
1690 PrintAndLog("reserved Code: %u", reservedCode);
1691 PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
1692 PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
1693 PrintAndLog("Extended: 0x%X\n", extended);
1694
1695 return 1;
1696 }
1697
1698
1699 //by marshmellow
1700 //attempt to psk1 demod graph buffer
1701 int PSKDemod(const char *Cmd, bool verbose)
1702 {
1703 int invert=0;
1704 int clk=0;
1705 int maxErr=100;
1706 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1707 if (clk==1){
1708 invert=1;
1709 clk=0;
1710 }
1711 if (invert != 0 && invert != 1) {
1712 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
1713 return 0;
1714 }
1715 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1716 size_t BitLen = getFromGraphBuf(BitStream);
1717 if (BitLen==0) return 0;
1718 uint8_t carrier=countFC(BitStream, BitLen, 0);
1719 if (carrier!=2 && carrier!=4 && carrier!=8){
1720 //invalid carrier
1721 return 0;
1722 }
1723 if (g_debugMode){
1724 PrintAndLog("Carrier: rf/%d",carrier);
1725 }
1726 int errCnt=0;
1727 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
1728 if (errCnt > maxErr){
1729 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1730 return 0;
1731 }
1732 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1733 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1734 return 0;
1735 }
1736 if (verbose || g_debugMode){
1737 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
1738 if (errCnt>0){
1739 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1740 }
1741 }
1742 //prime demod buffer for output
1743 setDemodBuf(BitStream,BitLen,0);
1744 return 1;
1745 }
1746
1747 // Indala 26 bit decode
1748 // by marshmellow
1749 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1750 int CmdIndalaDecode(const char *Cmd)
1751 {
1752 int ans;
1753 if (strlen(Cmd)>0){
1754 ans = PSKDemod(Cmd, 0);
1755 } else{ //default to RF/32
1756 ans = PSKDemod("32", 0);
1757 }
1758
1759 if (!ans){
1760 if (g_debugMode)
1761 PrintAndLog("Error1: %d",ans);
1762 return 0;
1763 }
1764 uint8_t invert=0;
1765 size_t size = DemodBufferLen;
1766 int startIdx = indala26decode(DemodBuffer, &size, &invert);
1767 if (startIdx < 0 || size > 224) {
1768 if (g_debugMode)
1769 PrintAndLog("Error2: %d",ans);
1770 return -1;
1771 }
1772 setDemodBuf(DemodBuffer, size, (size_t)startIdx);
1773 if (invert)
1774 if (g_debugMode)
1775 PrintAndLog("Had to invert bits");
1776
1777 PrintAndLog("BitLen: %d",DemodBufferLen);
1778 //convert UID to HEX
1779 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1780 uid1=bytebits_to_byte(DemodBuffer,32);
1781 uid2=bytebits_to_byte(DemodBuffer+32,32);
1782 if (DemodBufferLen==64){
1783 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
1784 } else {
1785 uid3=bytebits_to_byte(DemodBuffer+64,32);
1786 uid4=bytebits_to_byte(DemodBuffer+96,32);
1787 uid5=bytebits_to_byte(DemodBuffer+128,32);
1788 uid6=bytebits_to_byte(DemodBuffer+160,32);
1789 uid7=bytebits_to_byte(DemodBuffer+192,32);
1790 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",
1791 sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1792 }
1793 if (g_debugMode){
1794 PrintAndLog("DEBUG: printing demodbuffer:");
1795 printDemodBuff();
1796 }
1797 return 1;
1798 }
1799
1800 int CmdPSKNexWatch(const char *Cmd)
1801 {
1802 if (!PSKDemod("", false)) return 0;
1803 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};
1804 size_t startIdx = 0, size = DemodBufferLen;
1805 bool invert = false;
1806 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
1807 // if didn't find preamble try again inverting
1808 if (!PSKDemod("1", false)) return 0;
1809 size = DemodBufferLen;
1810 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
1811 invert = true;
1812 }
1813 if (size != 128) return 0;
1814 setDemodBuf(DemodBuffer, size, startIdx+4);
1815 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
1816 //get ID
1817 uint32_t ID = 0;
1818 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
1819 for (uint8_t idx=0; idx<8; idx++){
1820 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
1821 }
1822 }
1823 //parity check (TBD)
1824
1825 //checksum check (TBD)
1826
1827 //output
1828 PrintAndLog("NexWatch ID: %d", ID);
1829 if (invert){
1830 PrintAndLog("Had to Invert - probably NexKey");
1831 for (uint8_t idx=0; idx<size; idx++)
1832 DemodBuffer[idx] ^= 1;
1833 }
1834
1835 CmdPrintDemodBuff("x");
1836 return 1;
1837 }
1838
1839 // by marshmellow
1840 // takes 3 arguments - clock, invert, maxErr as integers
1841 // attempts to demodulate nrz only
1842 // prints binary found and saves in demodbuffer for further commands
1843 int NRZrawDemod(const char *Cmd, bool verbose)
1844 {
1845 int invert=0;
1846 int clk=0;
1847 int maxErr=100;
1848 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1849 if (clk==1){
1850 invert=1;
1851 clk=0;
1852 }
1853 if (invert != 0 && invert != 1) {
1854 PrintAndLog("Invalid argument: %s", Cmd);
1855 return 0;
1856 }
1857 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1858 size_t BitLen = getFromGraphBuf(BitStream);
1859 if (BitLen==0) return 0;
1860 int errCnt=0;
1861 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
1862 if (errCnt > maxErr){
1863 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1864 return 0;
1865 }
1866 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
1867 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
1868 return 0;
1869 }
1870 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1871 //prime demod buffer for output
1872 setDemodBuf(BitStream,BitLen,0);
1873
1874 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
1875 if (verbose || g_debugMode) {
1876 PrintAndLog("NRZ demoded bitstream:");
1877 // Now output the bitstream to the scrollback by line of 16 bits
1878 printDemodBuff();
1879 }
1880 return 1;
1881 }
1882
1883 int CmdNRZrawDemod(const char *Cmd)
1884 {
1885 char cmdp = param_getchar(Cmd, 0);
1886 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H')
1887 return usage_data_rawdemod_nr();
1888
1889 return NRZrawDemod(Cmd, TRUE);
1890 }
1891
1892 // by marshmellow
1893 // takes 3 arguments - clock, invert, maxErr as integers
1894 // attempts to demodulate psk only
1895 // prints binary found and saves in demodbuffer for further commands
1896 int CmdPSK1rawDemod(const char *Cmd)
1897 {
1898 int ans;
1899 char cmdp = param_getchar(Cmd, 0);
1900 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H')
1901 return usage_data_rawdemod_p1();
1902
1903 ans = PSKDemod(Cmd, TRUE);
1904 //output
1905 if (!ans){
1906 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1907 return 0;
1908 }
1909
1910 PrintAndLog("PSK1 demoded bitstream:");
1911 // Now output the bitstream to the scrollback by line of 16 bits
1912 printDemodBuff();
1913 return 1;
1914 }
1915
1916 // by marshmellow
1917 // takes same args as cmdpsk1rawdemod
1918 int CmdPSK2rawDemod(const char *Cmd)
1919 {
1920 int ans=0;
1921 char cmdp = param_getchar(Cmd, 0);
1922 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H')
1923 return usage_data_rawdemod_p2();
1924
1925 ans=PSKDemod(Cmd, TRUE);
1926 if (!ans){
1927 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1928 return 0;
1929 }
1930 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1931 PrintAndLog("PSK2 demoded bitstream:");
1932 // Now output the bitstream to the scrollback by line of 16 bits
1933 printDemodBuff();
1934 return 1;
1935 }
1936
1937 // by marshmellow - combines all raw demod functions into one menu command
1938 int CmdRawDemod(const char *Cmd)
1939 {
1940 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1941 char cmdp2 = Cmd[1];
1942 int ans = 0;
1943
1944 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd) < 2)
1945 return usage_data_rawdemod();
1946
1947 if (cmdp == 'f' && cmdp2 == 's')
1948 ans = CmdFSKrawdemod(Cmd+2);
1949 else if(cmdp == 'a' && cmdp2 == 'b')
1950 ans = Cmdaskbiphdemod(Cmd+2);
1951 else if(cmdp == 'a' && cmdp2 == 'm')
1952 ans = Cmdaskmandemod(Cmd+2);
1953 else if(cmdp == 'a' && cmdp2 == 'r')
1954 ans = Cmdaskrawdemod(Cmd+2);
1955 else if(cmdp == 'n' && cmdp2 == 'r')
1956 ans = CmdNRZrawDemod(Cmd+2);
1957 else if(cmdp == 'p' && cmdp2 == '1')
1958 ans = CmdPSK1rawDemod(Cmd+2);
1959 else if(cmdp == 'p' && cmdp2 == '2')
1960 ans = CmdPSK2rawDemod(Cmd+2);
1961 else
1962 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1963
1964 return ans;
1965 }
1966 //iceman: diff sizes on the plotwindow?
1967 int CmdGrid(const char *Cmd)
1968 {
1969 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1970 PlotGridXdefault = PlotGridX;
1971 PlotGridYdefault = PlotGridY;
1972 RepaintGraphWindow();
1973 return 0;
1974 }
1975
1976 int CmdHexsamples(const char *Cmd)
1977 {
1978 int i, j;
1979 int requested = 0;
1980 int offset = 0;
1981 char string_buf[25];
1982 char* string_ptr = string_buf;
1983 uint8_t got[BIGBUF_SIZE];
1984
1985 sscanf(Cmd, "%i %i", &requested, &offset);
1986
1987 /* if no args send something */
1988 if (requested == 0) {
1989 requested = 8;
1990 }
1991 if (offset + requested > sizeof(got)) {
1992 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1993 return 0;
1994 }
1995
1996 GetFromBigBuf(got,requested,offset);
1997 WaitForResponse(CMD_ACK,NULL);
1998
1999 i = 0;
2000 for (j = 0; j < requested; j++) {
2001 i++;
2002 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
2003 if (i == 8) {
2004 *(string_ptr - 1) = '\0'; // remove the trailing space
2005 PrintAndLog("%s", string_buf);
2006 string_buf[0] = '\0';
2007 string_ptr = string_buf;
2008 i = 0;
2009 }
2010 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
2011 *(string_ptr - 1) = '\0';
2012 PrintAndLog("%s", string_buf);
2013 string_buf[0] = '\0';
2014 }
2015 }
2016 return 0;
2017 }
2018
2019 int CmdHide(const char *Cmd)
2020 {
2021 HideGraphWindow();
2022 return 0;
2023 }
2024
2025 //zero mean GraphBuffer
2026 int CmdHpf(const char *Cmd)
2027 {
2028 int i;
2029 int accum = 0;
2030
2031 for (i = 10; i < GraphTraceLen; ++i)
2032 accum += GraphBuffer[i];
2033
2034 accum /= (GraphTraceLen - 10);
2035
2036 for (i = 0; i < GraphTraceLen; ++i)
2037 GraphBuffer[i] -= accum;
2038
2039 RepaintGraphWindow();
2040 return 0;
2041 }
2042
2043 bool _headBit( BitstreamOut *stream)
2044 {
2045 int bytepos = stream->position >> 3; // divide by 8
2046 int bitpos = (stream->position++) & 7; // mask out 00000111
2047 return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
2048 }
2049
2050 uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
2051 {
2052 int i;
2053 uint8_t val = 0;
2054 for(i = 0 ; i < bits_per_sample; i++)
2055 val |= (_headBit(b) << (7-i));
2056
2057 return val;
2058 }
2059
2060 int getSamples(const char *Cmd, bool silent)
2061 {
2062 //If we get all but the last byte in bigbuf,
2063 // we don't have to worry about remaining trash
2064 // in the last byte in case the bits-per-sample
2065 // does not line up on byte boundaries
2066
2067 uint8_t got[BIGBUF_SIZE-1] = { 0 };
2068
2069 int n = strtol(Cmd, NULL, 0);
2070
2071 if ( n == 0 || n > sizeof(got))
2072 n = sizeof(got);
2073
2074 PrintAndLog("Reading %d bytes from device memory\n", n);
2075 GetFromBigBuf(got,n,0);
2076 PrintAndLog("Data fetched");
2077 UsbCommand response;
2078 if ( !WaitForResponseTimeout(CMD_ACK, &response, 10000) ) {
2079 PrintAndLog("timeout while waiting for reply.");
2080 return 1;
2081 }
2082
2083 uint8_t bits_per_sample = 8;
2084
2085 //Old devices without this feature would send 0 at arg[0]
2086 if (response.arg[0] > 0) {
2087 sample_config *sc = (sample_config *) response.d.asBytes;
2088 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample, sc->decimation);
2089 bits_per_sample = sc->bits_per_sample;
2090 }
2091
2092 if (bits_per_sample < 8) {
2093 PrintAndLog("Unpacking...");
2094 BitstreamOut bout = { got, bits_per_sample * n, 0};
2095 int j =0;
2096 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
2097 uint8_t sample = getByte(bits_per_sample, &bout);
2098 GraphBuffer[j] = ((int) sample )- 128;
2099 }
2100 GraphTraceLen = j;
2101 PrintAndLog("Unpacked %d samples" , j );
2102 } else {
2103 for (int j = 0; j < n; j++) {
2104 GraphBuffer[j] = ((int)got[j]) - 128;
2105 }
2106 GraphTraceLen = n;
2107 }
2108
2109 RepaintGraphWindow();
2110 return 0;
2111 }
2112
2113 int CmdSamples(const char *Cmd)
2114 {
2115 return getSamples(Cmd, false);
2116 }
2117
2118 int CmdTuneSamples(const char *Cmd)
2119 {
2120 int timeout = 0;
2121 printf("\nMeasuring antenna characteristics, please wait...");
2122
2123 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {0,0,0}};
2124 clearCommandBuffer();
2125 SendCommand(&c);
2126 UsbCommand resp;
2127 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING, &resp, 2000)) {
2128 timeout++;
2129 printf(".");
2130 if (timeout > 7) {
2131 PrintAndLog("\nNo response from Proxmark. Aborting...");
2132 return 1;
2133 }
2134 }
2135
2136 int peakv, peakf;
2137 int vLf125, vLf134, vHf;
2138 vLf125 = resp.arg[0] & 0xffff;
2139 vLf134 = resp.arg[0] >> 16;
2140 vHf = resp.arg[1] & 0xffff;;
2141 peakf = resp.arg[2] & 0xffff;
2142 peakv = resp.arg[2] >> 16;
2143 PrintAndLog("");
2144 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
2145 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
2146 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
2147 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
2148
2149 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
2150 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
2151 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2152 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
2153
2154 if (peakv < LF_UNUSABLE_V)
2155 PrintAndLog("# Your LF antenna is unusable.");
2156 else if (peakv < LF_MARGINAL_V)
2157 PrintAndLog("# Your LF antenna is marginal.");
2158 if (vHf < HF_UNUSABLE_V)
2159 PrintAndLog("# Your HF antenna is unusable.");
2160 else if (vHf < HF_MARGINAL_V)
2161 PrintAndLog("# Your HF antenna is marginal.");
2162
2163 if (peakv >= LF_UNUSABLE_V) {
2164 for (int i = 0; i < 256; i++) {
2165 GraphBuffer[i] = resp.d.asBytes[i] - 128;
2166 }
2167 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
2168 PrintAndLog("\n");
2169 GraphTraceLen = 256;
2170 ShowGraphWindow();
2171 RepaintGraphWindow();
2172 }
2173 return 0;
2174 }
2175
2176 int CmdLoad(const char *Cmd)
2177 {
2178 char filename[FILE_PATH_SIZE] = {0x00};
2179 int len = 0;
2180
2181 len = strlen(Cmd);
2182 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2183 memcpy(filename, Cmd, len);
2184
2185 FILE *f = fopen(filename, "r");
2186 if (!f) {
2187 PrintAndLog("couldn't open '%s'", filename);
2188 return 0;
2189 }
2190
2191 GraphTraceLen = 0;
2192 char line[80];
2193 while (fgets(line, sizeof (line), f)) {
2194 GraphBuffer[GraphTraceLen] = atoi(line);
2195 GraphTraceLen++;
2196 }
2197 fclose(f);
2198 PrintAndLog("loaded %d samples", GraphTraceLen);
2199 RepaintGraphWindow();
2200 return 0;
2201 }
2202
2203 int CmdLtrim(const char *Cmd)
2204 {
2205 int ds = atoi(Cmd);
2206
2207 if (GraphTraceLen <= 0) return 0;
2208
2209 for (int i = ds; i < GraphTraceLen; ++i)
2210 GraphBuffer[i-ds] = GraphBuffer[i];
2211
2212 GraphTraceLen -= ds;
2213 RepaintGraphWindow();
2214 return 0;
2215 }
2216
2217 // trim graph to input argument length
2218 int CmdRtrim(const char *Cmd)
2219 {
2220 int ds = atoi(Cmd);
2221 GraphTraceLen = ds;
2222 RepaintGraphWindow();
2223 return 0;
2224 }
2225
2226 int CmdNorm(const char *Cmd)
2227 {
2228 int i;
2229 int max = INT_MIN, min = INT_MAX;
2230
2231 for (i = 10; i < GraphTraceLen; ++i) {
2232 if (GraphBuffer[i] > max) max = GraphBuffer[i];
2233 if (GraphBuffer[i] < min) min = GraphBuffer[i];
2234 }
2235
2236 if (max != min) {
2237 for (i = 0; i < GraphTraceLen; ++i) {
2238 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 / (max - min);
2239 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
2240 }
2241 }
2242 RepaintGraphWindow();
2243 return 0;
2244 }
2245
2246 int CmdPlot(const char *Cmd)
2247 {
2248 ShowGraphWindow();
2249 return 0;
2250 }
2251
2252 int CmdSave(const char *Cmd)
2253 {
2254 char filename[FILE_PATH_SIZE] = {0x00};
2255 int len = 0;
2256
2257 len = strlen(Cmd);
2258 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2259 memcpy(filename, Cmd, len);
2260
2261
2262 FILE *f = fopen(filename, "w");
2263 if(!f) {
2264 PrintAndLog("couldn't open '%s'", filename);
2265 return 0;
2266 }
2267 int i;
2268 for (i = 0; i < GraphTraceLen; i++) {
2269 fprintf(f, "%d\n", GraphBuffer[i]);
2270 }
2271 fclose(f);
2272 PrintAndLog("saved to '%s'", Cmd);
2273 return 0;
2274 }
2275
2276 int CmdScale(const char *Cmd)
2277 {
2278 CursorScaleFactor = atoi(Cmd);
2279 if (CursorScaleFactor == 0) {
2280 PrintAndLog("bad, can't have zero scale");
2281 CursorScaleFactor = 1;
2282 }
2283 RepaintGraphWindow();
2284 return 0;
2285 }
2286
2287 int CmdDirectionalThreshold(const char *Cmd)
2288 {
2289 int8_t upThres = param_get8(Cmd, 0);
2290 int8_t downThres = param_get8(Cmd, 1);
2291
2292 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
2293
2294 int lastValue = GraphBuffer[0];
2295 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
2296
2297 for (int i = 1; i < GraphTraceLen; ++i) {
2298 // Apply first threshold to samples heading up
2299 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2300 {
2301 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2302 GraphBuffer[i] = 1;
2303 }
2304 // Apply second threshold to samples heading down
2305 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2306 {
2307 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2308 GraphBuffer[i] = -1;
2309 }
2310 else
2311 {
2312 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2313 GraphBuffer[i] = GraphBuffer[i-1];
2314 }
2315 }
2316 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2317 RepaintGraphWindow();
2318 return 0;
2319 }
2320
2321 int CmdZerocrossings(const char *Cmd)
2322 {
2323 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2324 CmdHpf("");
2325
2326 int sign = 1;
2327 int zc = 0;
2328 int lastZc = 0;
2329
2330 for (int i = 0; i < GraphTraceLen; ++i) {
2331 if (GraphBuffer[i] * sign >= 0) {
2332 // No change in sign, reproduce the previous sample count.
2333 zc++;
2334 GraphBuffer[i] = lastZc;
2335 } else {
2336 // Change in sign, reset the sample count.
2337 sign = -sign;
2338 GraphBuffer[i] = lastZc;
2339 if (sign > 0) {
2340 lastZc = zc;
2341 zc = 0;
2342 }
2343 }
2344 }
2345
2346 RepaintGraphWindow();
2347 return 0;
2348 }
2349
2350 /**
2351 * @brief Utility for conversion via cmdline.
2352 * @param Cmd
2353 * @return
2354 */
2355 int Cmdbin2hex(const char *Cmd)
2356 {
2357 int bg =0, en =0;
2358 if(param_getptr(Cmd, &bg, &en, 0))
2359 return usage_data_bin2hex();
2360
2361 //Number of digits supplied as argument
2362 size_t length = en - bg +1;
2363 size_t bytelen = (length+7) / 8;
2364 uint8_t* arr = (uint8_t *) malloc(bytelen);
2365 memset(arr, 0, bytelen);
2366 BitstreamOut bout = { arr, 0, 0 };
2367
2368 for (; bg <= en ;bg++) {
2369 char c = Cmd[bg];
2370 if( c == '1') pushBit(&bout, 1);
2371 else if( c == '0') pushBit(&bout, 0);
2372 else PrintAndLog("Ignoring '%c'", c);
2373 }
2374
2375 if (bout.numbits % 8 != 0)
2376 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
2377
2378 //Uses printf instead of PrintAndLog since the latter
2379 // adds linebreaks to each printout - this way was more convenient since we don't have to
2380 // allocate a string and write to that first...
2381 for(size_t x = 0; x < bytelen ; x++)
2382 printf("%02X", arr[x]);
2383
2384 printf("\n");
2385 free(arr);
2386 return 0;
2387 }
2388
2389 int Cmdhex2bin(const char *Cmd)
2390 {
2391 int bg =0, en =0;
2392 if(param_getptr(Cmd, &bg, &en, 0)) return usage_data_hex2bin();
2393
2394 while (bg <= en ) {
2395 char x = Cmd[bg++];
2396 // capitalize
2397 if (x >= 'a' && x <= 'f')
2398 x -= 32;
2399 // convert to numeric value
2400 if (x >= '0' && x <= '9')
2401 x -= '0';
2402 else if (x >= 'A' && x <= 'F')
2403 x -= 'A' - 10;
2404 else
2405 continue;
2406
2407 //Uses printf instead of PrintAndLog since the latter
2408 // adds linebreaks to each printout - this way was more convenient since we don't have to
2409 // allocate a string and write to that first...
2410
2411 for(int i= 0 ; i < 4 ; ++i)
2412 printf("%d",(x >> (3 - i)) & 1);
2413 }
2414 printf("\n");
2415
2416 return 0;
2417 }
2418
2419 int CmdDataIIR(const char *Cmd){
2420
2421 uint8_t k = param_get8(Cmd,0);
2422 //iceIIR_Butterworth(GraphBuffer, GraphTraceLen);
2423 iceSimple_Filter(GraphBuffer, GraphTraceLen, k);
2424 RepaintGraphWindow();
2425 return 0;
2426 }
2427
2428 static command_t CommandTable[] =
2429 {
2430 {"help", CmdHelp, 1, "This help"},
2431 {"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)"},
2432 {"askem410xdemod", CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
2433 {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
2434 {"askvikingdemod", CmdVikingDemod, 1, "Demodulate a Viking AM tag from GraphBuffer"},
2435 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
2436 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
2437 {"bin2hex", Cmdbin2hex, 1, "<digits> -- Converts binary to hexadecimal"},
2438 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
2439 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2440 {"dec", CmdDec, 1, "Decimate samples"},
2441 {"detectclock", CmdDetectClockRate, 1, "[<a|f|n|p>] Detect ASK, FSK, NRZ, PSK clock rate of wave in GraphBuffer"},
2442 {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
2443 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
2444 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
2445 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2446 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2447 {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2448 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
2449 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
2450 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
2451 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
2452 {"hex2bin", Cmdhex2bin, 1, "<hexadecimal> -- Converts hexadecimal to binary"},
2453 {"hide", CmdHide, 1, "Hide graph window"},
2454 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
2455 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2456 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
2457 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
2458 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
2459 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
2460 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
2461 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
2462 {"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
2463 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
2464 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2465 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
2466 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2467 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
2468 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
2469 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
2470 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2471 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
2472 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
2473 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
2474 {"iir", CmdDataIIR, 0, "apply IIR buttersworth filter on plotdata"},
2475 {NULL, NULL, 0, NULL}
2476 };
2477
2478 int CmdData(const char *Cmd){
2479 clearCommandBuffer();
2480 CmdsParse(CommandTable, Cmd);
2481 return 0;
2482 }
2483
2484 int CmdHelp(const char *Cmd)
2485 {
2486 CmdsHelp(CommandTable);
2487 return 0;
2488 }
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