git.zerfleddert.de Git - proxmark3-svn/blob

1 //-----------------------------------------------------------------------------

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 //-----------------------------------------------------------------------------

11 #include <stdio.h> // also included in util.h

12 #include <string.h> // also included in util.h

13 #include <inttypes.h>

14 #include <limits.h> // for CmdNorm INT_MIN && INT_MAX

 #include "data.h"     // also included in util.h

16 #include "cmddata.h"

17 #include "util.h"

18 #include "cmdmain.h"

19 #include "proxmark3.h"

20 #include "ui.h" // for show graph controls

 #include "graph.h"    // for graph data

 #include "cmdparser.h"// already included in cmdmain.h

 #include "usb_cmd.h"  // already included in cmdmain.h and proxmark3.h

 #include "lfdemod.h"  // for demod code

 #include "crc.h"      // for pyramid checksum maxim

 #include "crc16.h"    // for FDXB demod checksum

 #include "loclass/cipherutils.h" // for decimating samples in getsamples

 #include "cmdlfem4x.h"// for em410x demod

30 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];

31 uint8_t g_debugMode=0;

32 size_t DemodBufferLen=0;

33 //size_t g_demodStartIdx=0;

34 //uint8_t g_demodClock=0;

 static int CmdHelp(const char *Cmd);

38 //set the demod buffer with given array of binary (one bit per byte)

39 //by marshmellow

 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)

41 {

42 if (buff == NULL)

43 return;

45 if ( size >= MAX_DEMOD_BUF_LEN)

46 size = MAX_DEMOD_BUF_LEN;

48 size_t i = 0;

         for (; i < size; i++){

50 DemodBuffer[i]=buff[startIdx++];

51 }

52 DemodBufferLen=size;

53 return;

54 }

 int CmdSetDebugMode(const char *Cmd)

57 {

58 int demod=0;

         sscanf(Cmd, "%i", &demod);

60 g_debugMode=(uint8_t)demod;

61 return 1;

62 }

64 int usage_data_printdemodbuf(){

65 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");

66 PrintAndLog("Options: ");

67 PrintAndLog(" h This help");

68 PrintAndLog(" x output in hex (omit for binary output)");

69 PrintAndLog(" o <offset> enter offset in # of bits");

70 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");

71 return 0;

72 }

74 //by marshmellow

 void printDemodBuff(void)

76 {

77 int bitLen = DemodBufferLen;

         if (bitLen<1) {

79 PrintAndLog("no bits found in demod buffer");

80 return;

81 }

         if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty

         char *bin = sprint_bin_break(DemodBuffer,bitLen,16);

         PrintAndLog("%s",bin);

87 return;

88 }

 int CmdPrintDemodBuff(const char *Cmd)

91 {

         char hex[512]={0x00};

93 bool hexMode = false;

94 bool errors = false;

         uint32_t offset = 0; //could be size_t but no param_get16...

96 uint32_t length = 512;

97 char cmdp = 0;

         while(param_getchar(Cmd, cmdp) != 0x00)

99 {

                 switch(param_getchar(Cmd, cmdp))

101 {

102 case 'h':

103 case 'H':

104 return usage_data_printdemodbuf();

105 case 'x':

106 case 'X':

107 hexMode = true;

108 cmdp++;

109 break;

110 case 'o':

111 case 'O':

                         offset = param_get32ex(Cmd, cmdp+1, 0, 10);

                         if (!offset) errors = true;

114 cmdp += 2;

115 break;

116 case 'l':

117 case 'L':

                         length = param_get32ex(Cmd, cmdp+1, 512, 10);

                         if (!length) errors = true;

120 cmdp += 2;

121 break;

122 default:

                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));

124 errors = true;

125 break;

126 }

                 if(errors) break;

128 }

129 //Validations

         if(errors) return usage_data_printdemodbuf();

         length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length; 

         int numBits = (length) & 0x00FFC; //make sure we don't exceed our string

133

134 if (hexMode){

                 char *buf = (char *) (DemodBuffer + offset);

                 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;

                 numBits = binarraytohex(hex, buf, numBits);

                 if (numBits==0) return 0;

                 PrintAndLog("DemodBuffer: %s",hex);             

140 } else {

                 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));

142 }

143 return 1;

144 }

145

146 //by marshmellow

147 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer

 int CmdGetBitStream(const char *Cmd)

149 {

150 int i;

151 CmdHpf(Cmd);

         for (i = 0; i < GraphTraceLen; i++) {

                 if (GraphBuffer[i] >= 1) {

154 GraphBuffer[i] = 1;

155 } else {

156 GraphBuffer[i] = 0;

157 }

158 }

159 RepaintGraphWindow();

160 return 0;

161 }

162

163 //by marshmellow

164 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'

165 // (amp may not be needed anymore)

166 //verbose will print results and demoding messages

167 //emSearch will auto search for EM410x format in bitstream

168 //askType switches decode: ask/raw = 0, ask/manchester = 1

 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {

170 int invert=0;

171 int clk=0;

172 int maxErr=100;

173 int maxLen=0;

174 uint8_t askamp = 0;

         char amp = param_getchar(Cmd, 0);

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);

         if (!maxLen) maxLen = BIGBUF_SIZE;

         if (invert != 0 && invert != 1) {

                 PrintAndLog("Invalid argument: %s", Cmd);

181 return 0;

182 }

         if (clk==1){

184 invert=1;

185 clk=0;

186 }

         size_t BitLen = getFromGraphBuf(BitStream);

         if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);

         if (BitLen < 255) return 0;

         if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;

191 int foundclk = 0;

192 //amp before ST check

         if (amp == 'a' || amp == 'A') {

194 askAmp(BitStream, BitLen);

195 }

196 bool st = false;

         size_t ststart = 0, stend = 0;

         if (*stCheck) st = DetectST_ext(BitStream, &BitLen, &foundclk, &ststart, &stend);

199 if (st) {

200 *stCheck = st;

                 clk = (clk == 0) ? foundclk : clk;

202 CursorCPos = ststart;

203 CursorDPos = stend;

                 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");

205 }

         int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);

         if (errCnt<0 || BitLen<16){  //if fatal error (or -1)

                 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);

209 return 0;

210 }

211 if (errCnt > maxErr){

                 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);

213 return 0;

214 }

         if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);

216

217 //output

         setDemodBuf(BitStream,BitLen,0);

219 if (verbose || g_debugMode){

                 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);

                 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);

                 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);

223 // Now output the bitstream to the scrollback by line of 16 bits

224 printDemodBuff();

225

226 }

227 uint64_t lo = 0;

228 uint32_t hi = 0;

229 if (emSearch){

                 AskEm410xDecode(true, &hi, &lo);

231 }

232 return 1;

233 }

 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {

235 bool st = false;

         return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);

237 }

238

239 //by marshmellow

240 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'

241 //attempts to demodulate ask while decoding manchester

242 //prints binary found and saves in graphbuffer for further commands

 int Cmdaskmandemod(const char *Cmd)

244 {

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {

247 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");

248 PrintAndLog(" ['s'] optional, check for Sequence Terminator");

249 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");

250 PrintAndLog(" <invert>, 1 to invert output");

251 PrintAndLog(" [set maximum allowed errors], default = 100");

252 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");

253 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");

254 PrintAndLog("");

255 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");

256 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");

257 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");

258 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");

259 PrintAndLog(" : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");

260 return 0;

261 }

262 bool st = true;

         if (Cmd[0]=='s') 

                 return ASKDemod_ext(Cmd++, true, true, 1, &st);

         else if (Cmd[1] == 's')

                 return ASKDemod_ext(Cmd+=2, true, true, 1, &st);

267 else

                 return ASKDemod(Cmd, true, true, 1);

269 }

270

271 //by marshmellow

272 //manchester decode

273 //stricktly take 10 and 01 and convert to 0 and 1

 int Cmdmandecoderaw(const char *Cmd)

275 {

276 int i =0;

277 int errCnt=0;

278 size_t size=0;

279 int invert=0;

280 int maxErr = 20;

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {

283 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");

284 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");

285 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");

286 PrintAndLog(" [invert] invert output");

287 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");

288 PrintAndLog("");

289 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");

290 return 0;

291 }

         if (DemodBufferLen==0) return 0;

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         int high=0,low=0;

         for (;i<DemodBufferLen;++i){

                 if (DemodBuffer[i]>high) high=DemodBuffer[i];

                 else if(DemodBuffer[i]<low) low=DemodBuffer[i];

298 BitStream[i]=DemodBuffer[i];

299 }

         if (high>7 || low <0 ){

301 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");

302 return 0;

303 }

304

         sscanf(Cmd, "%i %i", &invert, &maxErr);

306 size=i;

307 uint8_t alignPos = 0;

         errCnt=manrawdecode(BitStream, &size, invert, &alignPos);

309 if (errCnt>=maxErr){

                 PrintAndLog("Too many errors: %d",errCnt);

311 return 0;

312 }

         PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);

         PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));

         if (errCnt==0){

316 uint64_t id = 0;

317 uint32_t hi = 0;

318 size_t idx=0;

                 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){

320 //need to adjust to set bitstream back to manchester encoded data

321 //setDemodBuf(BitStream, size, idx);

322

323 printEM410x(hi, id);

324 }

325 }

326 return 1;

327 }

328

329 //by marshmellow

330 //biphase decode

331 //take 01 or 10 = 0 and 11 or 00 = 1

332 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit

333 // and "invert" default = 0 if 1 it will invert output

334 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]

 int CmdBiphaseDecodeRaw(const char *Cmd)

336 {

337 size_t size=0;

         int offset=0, invert=0, maxErr=20, errCnt=0;

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {

341 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");

342 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");

343 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");

344 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");

345 PrintAndLog("");

346 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");

347 PrintAndLog(" [invert <0|1>], set to 1 to invert output");

348 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");

349 PrintAndLog("");

350 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");

351 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");

352 return 0;

353 }

         sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);

         if (DemodBufferLen==0){

356 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");

357 return 0;

358 }

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         memcpy(BitStream, DemodBuffer, DemodBufferLen); 

361 size = DemodBufferLen;

         errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);

         if (errCnt<0){

                 PrintAndLog("Error during decode:%d", errCnt);

365 return 0;

366 }

367 if (errCnt>maxErr){

                 PrintAndLog("Too many errors attempting to decode: %d",errCnt);

369 return 0;

370 }

371

         if (errCnt>0){

                 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);

374 }

         PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);

         PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));

377

         if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset);  //remove first bit from raw demod

379 return 1;

380 }

381

382 //by marshmellow

383 // - ASK Demod then Biphase decode GraphBuffer samples

 int ASKbiphaseDemod(const char *Cmd, bool verbose)

385 {

386 //ask raw demod GraphBuffer first

         int offset=0, clk=0, invert=0, maxErr=0;

         sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);

389

390 uint8_t BitStream[MAX_DEMOD_BUF_LEN];

         size_t size = getFromGraphBuf(BitStream);         

392 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer

         int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);  

         if ( errCnt < 0 || errCnt > maxErr ) {   

                 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);  

396 return 0;

397 }

398

399 //attempt to Biphase decode BitStream

         errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);

         if (errCnt < 0){

                 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);

403 return 0;

404 }

405 if (errCnt > maxErr) {

                 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);

407 return 0;

408 }

409 //success set DemodBuffer and return

         setDemodBuf(BitStream, size, 0);

411 if (g_debugMode || verbose){

                 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);

413 printDemodBuff();

414 }

415 return 1;

416 }

417 //by marshmellow - see ASKbiphaseDemod

 int Cmdaskbiphdemod(const char *Cmd)

419 {

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {

422 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");

423 PrintAndLog(" [offset], offset to begin biphase, default=0");

424 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");

425 PrintAndLog(" <invert>, 1 to invert output");

426 PrintAndLog(" [set maximum allowed errors], default = 100");

427 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");

428 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");

429 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");

430 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");

431 PrintAndLog(" NOTE: any other arg must have previous args set to work");

432 PrintAndLog("");

433 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");

434 PrintAndLog("");

435 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");

436 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");

437 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");

438 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");

439 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");

440 PrintAndLog(" : data rawdemod ab 0 64 1 0 = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");

441 PrintAndLog(" : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");

442 return 0;

443 }

         return ASKbiphaseDemod(Cmd, true);

445 }

446

447 //could be split to a gProxII file

448 //by marshmellow

449 //attempts to demodulate and identify a G_Prox_II verex/chubb card

450 //WARNING: if it fails during some points it will destroy the DemodBuffer data

451 // but will leave the GraphBuffer intact.

452 //if successful it will push askraw data back to demod buffer ready for emulation

 int CmdG_Prox_II_Demod(const char *Cmd)

454 {

         if (!ASKbiphaseDemod(Cmd, false)){

                 if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");

457 return 0;

458 }

459 size_t size = DemodBufferLen;

460 //call lfdemod.c demod for gProxII

         int ans = gProxII_Demod(DemodBuffer, &size);

         if (ans < 0){

                 if (g_debugMode) PrintAndLog("Error gProxII_Demod");

464 return 0;

465 }

466 //got a good demod of 96 bits

         uint8_t ByteStream[8] = {0x00};

468 uint8_t xorKey=0;

         size_t startIdx = ans + 6; //start after 6 bit preamble

470

471 uint8_t bits_no_spacer[90];

472 //so as to not mess with raw DemodBuffer copy to a new sample array

         memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);

474 // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))

         size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run

         if (bitLen != 72) {

                 if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);

478 return 0;

479 }

480 // get key and then get all 8 bytes of payload decoded

         xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);

         for (size_t idx = 0; idx < 8; idx++) {

                 ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;

                 if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);

485 }

486 //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data

487 //

         uint8_t fmtLen = ByteStream[0]>>2;

489 uint32_t FC = 0;

490 uint32_t Card = 0;

491 //get raw 96 bits to print

         uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);

         uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);

         uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);

495

         if (fmtLen==36){

                 FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);

                 Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);

                 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);

         } else if(fmtLen==26){

                 FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);

                 Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);

                 PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);

504 } else {

                 PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);

                 PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8)); 

507 }

         PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);

         setDemodBuf(DemodBuffer+ans, 96, 0);

510 return 1;

511 }

512

513 //by marshmellow - see ASKDemod

 int Cmdaskrawdemod(const char *Cmd)

515 {

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {

518 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");

519 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");

520 PrintAndLog(" <invert>, 1 to invert output");

521 PrintAndLog(" [set maximum allowed errors], default = 100");

522 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");

523 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");

524 PrintAndLog("");

525 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");

526 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");

527 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");

528 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");

529 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");

530 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");

531 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");

532 return 0;

533 }

         return ASKDemod(Cmd, true, false, 0);

535 }

536

 int AutoCorrelate(int window, bool SaveGrph, bool verbose)

538 {

539 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];

540 size_t Correlation = 0;

541 int maxSum = 0;

542 int lastMax = 0;

         if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);

         for (int i = 0; i < GraphTraceLen - window; ++i) {

545 int sum = 0;

                 for (int j = 0; j < window; ++j) {

                         sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;

548 }

549 CorrelBuffer[i] = sum;

                 if (sum >= maxSum-100 && sum <= maxSum+100){

551 //another max

552 Correlation = i-lastMax;

553 lastMax = i;

                         if (sum > maxSum) maxSum = sum;

                 } else if (sum > maxSum){

556 maxSum=sum;

557 lastMax = i;

558 }

559 }

         if (Correlation==0){

561 //try again with wider margin

                 for (int i = 0; i < GraphTraceLen - window; i++){

                         if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){

564 //another max

565 Correlation = i-lastMax;

566 lastMax = i;

567 //if (CorrelBuffer[i] > maxSum) maxSum = sum;

568 }

569 }

570 }

         if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);

572

573 if (SaveGrph){

574 GraphTraceLen = GraphTraceLen - window;

                 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));

576 RepaintGraphWindow();

577 }

578 return Correlation;

579 }

580

 int usage_data_autocorr(void)

582 {

583 //print help

584 PrintAndLog("Usage: data autocorr [window] [g]");

585 PrintAndLog("Options: ");

586 PrintAndLog(" h This help");

587 PrintAndLog(" [window] window length for correlation - default = 4000");

588 PrintAndLog(" g save back to GraphBuffer (overwrite)");

589 return 0;

590 }

591

 int CmdAutoCorr(const char *Cmd)

593 {

         char cmdp = param_getchar(Cmd, 0);

         if (cmdp == 'h' || cmdp == 'H') 

596 return usage_data_autocorr();

         int window = 4000; //set default

598 char grph=0;

599 bool updateGrph = false;

         sscanf(Cmd, "%i %c", &window, &grph);

601

602 if (window >= GraphTraceLen) {

603 PrintAndLog("window must be smaller than trace (%d samples)",

604 GraphTraceLen);

605 return 0;

606 }

         if (grph == 'g') updateGrph=true;

         return AutoCorrelate(window, updateGrph, true);

609 }

610

 int CmdBitsamples(const char *Cmd)

612 {

613 int cnt = 0;

614 uint8_t got[12288];

615

         GetFromBigBuf(got,sizeof(got),0);

617 WaitForResponse(CMD_ACK,NULL);

618

                 for (int j = 0; j < sizeof(got); j++) {

                         for (int k = 0; k < 8; k++) {

                                 if(got[j] & (1 << (7 - k))) {

622 GraphBuffer[cnt++] = 1;

623 } else {

624 GraphBuffer[cnt++] = 0;

625 }

626 }

627 }

628 GraphTraceLen = cnt;

629 RepaintGraphWindow();

630 return 0;

631 }

632

 int CmdBuffClear(const char *Cmd)

634 {

635 UsbCommand c = {CMD_BUFF_CLEAR};

636 SendCommand(&c);

637 ClearGraph(true);

638 return 0;

639 }

640

 int CmdDec(const char *Cmd)

642 {

         for (int i = 0; i < (GraphTraceLen / 2); ++i)

                 GraphBuffer[i] = GraphBuffer[i * 2];

645 GraphTraceLen /= 2;

646 PrintAndLog("decimated by 2");

647 RepaintGraphWindow();

648 return 0;

649 }

650 /**

651 * Undecimate - I'd call it 'interpolate', but we'll save that

652 * name until someone does an actual interpolation command, not just

653 * blindly repeating samples

654 * @param Cmd

655 * @return

656 */

 int CmdUndec(const char *Cmd)

658 {

         if(param_getchar(Cmd, 0) == 'h')

660 {

661 PrintAndLog("Usage: data undec [factor]");

662 PrintAndLog("This function performs un-decimation, by repeating each sample N times");

663 PrintAndLog("Options: ");

664 PrintAndLog(" h This help");

665 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");

666 PrintAndLog("Example: 'data undec 3'");

667 return 0;

668 }

669

         uint8_t factor = param_get8ex(Cmd, 0,2, 10);

671 //We have memory, don't we?

         int swap[MAX_GRAPH_TRACE_LEN] = { 0 };

         uint32_t g_index = 0, s_index = 0;

         while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)

675 {

676 int count = 0;

                 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)

                         swap[s_index+count] = GraphBuffer[g_index];

679

680 s_index += count;

681 g_index++;

682 }

683

         memcpy(GraphBuffer, swap, s_index * sizeof(int));

685 GraphTraceLen = s_index;

686 RepaintGraphWindow();

687 return 0;

688 }

689

690 //by marshmellow

691 //shift graph zero up or down based on input + or -

 int CmdGraphShiftZero(const char *Cmd)

693 {

694

695 int shift=0;

696 //set options from parameters entered with the command

         sscanf(Cmd, "%i", &shift);

698 int shiftedVal=0;

         for(int i = 0; i<GraphTraceLen; i++){

700 shiftedVal=GraphBuffer[i]+shift;

                 if (shiftedVal>127) 

702 shiftedVal=127;

                 else if (shiftedVal<-127) 

704 shiftedVal=-127;

705 GraphBuffer[i]= shiftedVal;

706 }

707 CmdNorm("");

708 return 0;

709 }

710

711 //by marshmellow

712 //use large jumps in read samples to identify edges of waves and then amplify that wave to max

713 //similar to dirtheshold, threshold commands

714 //takes a threshold length which is the measured length between two samples then determines an edge

 int CmdAskEdgeDetect(const char *Cmd)

716 {

717 int thresLen = 25;

718 int Last = 0;

         sscanf(Cmd, "%i", &thresLen); 

720

         for(int i = 1; i<GraphTraceLen; i++){

                 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up

723 Last = 127;

                 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down

725 Last = -127;

                 GraphBuffer[i-1] = Last;

727 }

728 RepaintGraphWindow();

729 return 0;

730 }

731

732 /* Print our clock rate */

733 // uses data from graphbuffer

734 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.

 int CmdDetectClockRate(const char *Cmd)

736 {

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {

739 PrintAndLog("Usage: data detectclock [modulation] <clock>");

740 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");

741 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");

742 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");

743 PrintAndLog("");

744 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");

745 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");

746 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");

747 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");

748 }

749 int ans=0;

         if (cmdp == 'a'){

                 ans = GetAskClock(Cmd+1, true, false);

         } else if (cmdp == 'f'){

                 ans = GetFskClock("", true, false);

         } else if (cmdp == 'n'){

                 ans = GetNrzClock("", true, false);

         } else if (cmdp == 'p'){

                 ans = GetPskClock("", true, false);

758 } else {

759 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");

760 }

761 return ans;

762 }

763

 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)

765 {

766 static char fType[8];

         memset(fType, 0x00, 8);

768 char *fskType = fType;

         if (fchigh==10 && fclow==8){

770 if (invert) //fsk2a

                         memcpy(fskType, "FSK2a", 5);

772 else //fsk2

                         memcpy(fskType, "FSK2", 4);

         } else if (fchigh == 8 && fclow == 5) {

775 if (invert)

                         memcpy(fskType, "FSK1", 4);

777 else

                         memcpy(fskType, "FSK1a", 5);

779 } else {

                 memcpy(fskType, "FSK??", 5);

781 }

782 return fskType;

783 }

784

785 //by marshmellow

786 //fsk raw demod and print binary

787 //takes 4 arguments - Clock, invert, fchigh, fclow

788 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))

 int FSKrawDemod(const char *Cmd, bool verbose)

790 {

791 //raw fsk demod no manchester decoding no start bit finding just get binary from wave

         uint8_t rfLen, invert, fchigh, fclow;

793 //set defaults

794 //set options from parameters entered with the command

         rfLen = param_get8(Cmd, 0);

         invert = param_get8(Cmd, 1);

         fchigh = param_get8(Cmd, 2);

         fclow = param_get8(Cmd, 3);

799

         if (strlen(Cmd)>0 && strlen(Cmd)<=2) {

                 if (rfLen==1) {

802 invert = 1; //if invert option only is used

803 rfLen = 0;

804 }

805 }

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         size_t BitLen = getFromGraphBuf(BitStream);

         if (BitLen==0) return 0;

809 //get field clock lengths

810 uint16_t fcs=0;

811 if (!fchigh || !fclow) {

                 fcs = countFC(BitStream, BitLen, 1);

813 if (!fcs) {

814 fchigh = 10;

815 fclow = 8;

816 } else {

                         fchigh = (fcs >> 8) & 0x00FF;

818 fclow = fcs & 0x00FF;

819 }

820 }

821 //get bit clock length

822 if (!rfLen) {

                 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);

                 if (!rfLen) rfLen = 50;

825 }

         int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);

         if (size > 0) {

                 setDemodBuf(BitStream,size,0);

829

830 // Now output the bitstream to the scrollback by line of 16 bits

831 if (verbose || g_debugMode) {

                         PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);

                         PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));

834 printDemodBuff();

835 }

836

837 return 1;

838 } else {

                 if (g_debugMode) PrintAndLog("no FSK data found");

840 }

841 return 0;

842 }

843

844 //by marshmellow

845 //fsk raw demod and print binary

846 //takes 4 arguments - Clock, invert, fchigh, fclow

847 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))

 int CmdFSKrawdemod(const char *Cmd)

849 {

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {

852 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");

853 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");

854 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");

855 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");

856 PrintAndLog(" [fclow], small field clock length, omit for autodetect");

857 PrintAndLog("");

858 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");

859 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");

860 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");

861 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");

862 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");

863 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");

864 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");

865 return 0;

866 }

         return FSKrawDemod(Cmd, true);

868 }

869

870 //by marshmellow

871 //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)

872 //print full Paradox Prox ID and some bit format details if found

 int CmdFSKdemodParadox(const char *Cmd)

874 {

875 //raw fsk demod no manchester decoding no start bit finding just get binary from wave

         uint32_t hi2=0, hi=0, lo=0;

877

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         size_t BitLen = getFromGraphBuf(BitStream);

         if (BitLen==0) return 0;

881 //get binary from fsk wave

         int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);

         if (idx<0){

884 if (g_debugMode){

                         if (idx==-1){

886 PrintAndLog("DEBUG: Just Noise Detected");

                         } else if (idx == -2) {

888 PrintAndLog("DEBUG: Error demoding fsk");

                         } else if (idx == -3) {

890 PrintAndLog("DEBUG: Preamble not found");

                         } else if (idx == -4) {

892 PrintAndLog("DEBUG: Error in Manchester data");

893 } else {

                                 PrintAndLog("DEBUG: Error demoding fsk %d", idx);

895 }

896 }

897 return 0;

898 }

         if (hi2==0 && hi==0 && lo==0){

                 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");

901 return 0;

902 }

         uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);

         uint32_t cardnum = (lo>>10)&0xFFFF;

         uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);

         uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);

         uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);

908

909 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",

                 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);

         setDemodBuf(BitStream,BitLen,idx);

912 if (g_debugMode){

                 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);

914 printDemodBuff();

915 }

916 return 1;

917 }

918

919 // FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)

920 // 8 databits + 1 parity (1)

921 // CIITT 16 chksum

922 // NATIONAL CODE, ICAR database

923 // COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf

924 // FLAG (animal/non-animal)

925 /*

926 38 IDbits

927 10 country code

928 1 extra app bit

929 14 reserved bits

930 1 animal bit

931 16 ccitt CRC chksum over 64bit ID CODE.

932 24 appli bits.

933

934 -- sample: 985121004515220 [ 37FF65B88EF94 ]

935 */

 int CmdFDXBdemodBI(const char *Cmd){

937

938 int invert = 1;

939 int clk = 32;

940 int errCnt = 0;

941 int maxErr = 0;

942 uint8_t BitStream[MAX_DEMOD_BUF_LEN];

         size_t size = getFromGraphBuf(BitStream);       

944

         errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);

         if ( errCnt < 0 || errCnt > maxErr ) { 

                 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);

948 return 0;

949 }

950

         errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);

         if (errCnt < 0 || errCnt > maxErr ) {

                 if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);

954 return 0;

955 }

956

         int preambleIndex = FDXBdemodBI(BitStream, &size);

         if (preambleIndex < 0){

                 if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);

960 return 0;

961 }

         if (size != 128) {

                 if (g_debugMode) PrintAndLog("Error incorrect data length found");

964 return 0;

965 }

966

         setDemodBuf(BitStream, 128, preambleIndex);

968

969 // remove marker bits (1's every 9th digit after preamble) (pType = 2)

         size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);

         if ( size != 104 ) {

                 if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);

973 return 0;

974 }

975 if (g_debugMode) {

                 char *bin = sprint_bin_break(BitStream,size,16);

                 PrintAndLog("DEBUG BinStream:\n%s",bin);

978 }

         PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");

         if (g_debugMode) PrintAndLog("Start marker %d;   Size %d", preambleIndex, size);

981

982 //got a good demod

         uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);

         uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);

         uint8_t dataBlockBit = BitStream[48];

         uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);

         uint8_t animalBit = BitStream[63];

         uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);

         uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);

990

         uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);

992 uint8_t raw[8];

         num_to_bytes(rawid, 8, raw);

994

         if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));

996

         uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);

         PrintAndLog("Animal ID:     %04u-%012" PRIu64, countryCode, NationalCode);

         PrintAndLog("National Code: %012" PRIu64, NationalCode);

         PrintAndLog("CountryCode:   %04u", countryCode);

         PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");

         PrintAndLog("reserved Code: %u", reservedCode);

         PrintAndLog("Animal Tag:    %s", animalBit ? "True" : "False");

         PrintAndLog("CRC:           0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");

         PrintAndLog("Extended:      0x%X\n", extended);

1006

1007 return 1;

1008 }

1009

1010

1011 //by marshmellow

1012 //attempt to psk1 demod graph buffer

 int PSKDemod(const char *Cmd, bool verbose)

1014 {

1015 int invert=0;

1016 int clk=0;

1017 int maxErr=100;

         sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);

         if (clk==1){

1020 invert=1;

1021 clk=0;

1022 }

         if (invert != 0 && invert != 1) {

                 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);

1025 return 0;

1026 }

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         size_t BitLen = getFromGraphBuf(BitStream);

         if (BitLen==0) return 0;

         uint8_t carrier=countFC(BitStream, BitLen, 0);

         if (carrier!=2 && carrier!=4 && carrier!=8){

1032 //invalid carrier

1033 return 0;

1034 }

1035 if (g_debugMode){

                 PrintAndLog("Carrier: rf/%d",carrier);

1037 }

1038 int errCnt=0;

         errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);

1040 if (errCnt > maxErr){

                 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);

1042 return 0;

1043 }

         if (errCnt<0|| BitLen<16){  //throw away static - allow 1 and -1 (in case of threshold command first)

                 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);

1046 return 0;

1047 }

1048 if (verbose || g_debugMode){

                 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);

                 if (errCnt>0){

                         PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);

1052 }

1053 }

1054 //prime demod buffer for output

         setDemodBuf(BitStream,BitLen,0);

1056 return 1;

1057 }

1058

1059 // Indala 26 bit decode

1060 // by marshmellow

1061 // optional arguments - same as CmdpskNRZrawDemod (clock & invert)

 int CmdIndalaDecode(const char *Cmd)

1063 {

1064 int ans;

         if (strlen(Cmd)>0){

                 ans = PSKDemod(Cmd, 0);

1067 } else{ //default to RF/32

                 ans = PSKDemod("32", 0);

1069 }

1070

1071 if (!ans){

1072 if (g_debugMode)

                         PrintAndLog("Error1: %d",ans);

1074 return 0;

1075 }

1076 uint8_t invert=0;

1077 size_t size = DemodBufferLen;

         int startIdx = indala26decode(DemodBuffer, &size, &invert);

         if (startIdx < 0 || size > 224) {

1080 if (g_debugMode)

                         PrintAndLog("Error2: %d",ans);

1082 return -1;

1083 }

         setDemodBuf(DemodBuffer, size, (size_t)startIdx);

1085 if (invert)

1086 if (g_debugMode)

1087 PrintAndLog("Had to invert bits");

1088

         PrintAndLog("BitLen: %d",DemodBufferLen);

1090 //convert UID to HEX

         uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;

         uid1=bytebits_to_byte(DemodBuffer,32);

         uid2=bytebits_to_byte(DemodBuffer+32,32);

         if (DemodBufferLen==64) {

                 PrintAndLog("Indala UID=%s (%x%08x)", sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);

1096 } else {

                 uid3=bytebits_to_byte(DemodBuffer+64,32);

                 uid4=bytebits_to_byte(DemodBuffer+96,32);

                 uid5=bytebits_to_byte(DemodBuffer+128,32);

                 uid6=bytebits_to_byte(DemodBuffer+160,32);

                 uid7=bytebits_to_byte(DemodBuffer+192,32);

1102 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)",

                     sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);

1104 }

1105 if (g_debugMode){

1106 PrintAndLog("DEBUG: printing demodbuffer:");

1107 printDemodBuff();

1108 }

1109 return 1;

1110 }

1111

 int CmdPSKNexWatch(const char *Cmd)

1113 {

         if (!PSKDemod("", false)) return 0;

         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};

         size_t startIdx = 0, size = DemodBufferLen; 

1117 bool invert = false;

         if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){

1119 // if didn't find preamble try again inverting

                 if (!PSKDemod("1", false)) return 0; 

1121 size = DemodBufferLen;

                 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;

1123 invert = true;

1124 }

         if (size != 128) return 0;

         setDemodBuf(DemodBuffer, size, startIdx+4);

         startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)

1128 //get ID

1129 uint32_t ID = 0;

         for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){

                 for (uint8_t idx=0; idx<8; idx++){

                         ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];

1133 }

1134 }

1135 //parity check (TBD)

1136

1137 //checksum check (TBD)

1138

1139 //output

         PrintAndLog("NexWatch ID: %d", ID);

1141 if (invert){

1142 PrintAndLog("Had to Invert - probably NexKey");

                 for (uint8_t idx=0; idx<size; idx++)

1144 DemodBuffer[idx] ^= 1;

1145 }

1146

1147 CmdPrintDemodBuff("x");

1148 return 1;

1149 }

1150

1151 // by marshmellow

1152 // takes 3 arguments - clock, invert, maxErr as integers

1153 // attempts to demodulate nrz only

1154 // prints binary found and saves in demodbuffer for further commands

 int NRZrawDemod(const char *Cmd, bool verbose)

1156 {

1157 int invert=0;

1158 int clk=0;

1159 int maxErr=100;

         sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);

         if (clk==1){

1162 invert=1;

1163 clk=0;

1164 }

         if (invert != 0 && invert != 1) {

                 PrintAndLog("Invalid argument: %s", Cmd);

1167 return 0;

1168 }

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         size_t BitLen = getFromGraphBuf(BitStream);

         if (BitLen==0) return 0;

1172 int errCnt=0;

1173 int clkStartIdx = 0;

         errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);

1175 if (errCnt > maxErr){

                 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);

1177 return 0;

1178 }

         if (errCnt<0 || BitLen<16){  //throw away static - allow 1 and -1 (in case of threshold command first)

                 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);

1181 return 0;

1182 }

         if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);

1184 //prime demod buffer for output

         setDemodBuf(BitStream,BitLen,0);

1186

         if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);

1188 if (verbose || g_debugMode) {

1189 PrintAndLog("NRZ demoded bitstream:");

1190 // Now output the bitstream to the scrollback by line of 16 bits

1191 printDemodBuff();

1192 }

1193 return 1;

1194 }

1195

 int CmdNRZrawDemod(const char *Cmd)

1197 {

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {

1200 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");

1201 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");

1202 PrintAndLog(" <invert>, 1 for invert output");

1203 PrintAndLog(" [set maximum allowed errors], default = 100.");

1204 PrintAndLog("");

1205 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");

1206 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");

1207 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");

1208 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");

1209 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");

1210 return 0;

1211 }

         return NRZrawDemod(Cmd, true);

1213 }

1214

1215 // by marshmellow

1216 // takes 3 arguments - clock, invert, maxErr as integers

1217 // attempts to demodulate psk only

1218 // prints binary found and saves in demodbuffer for further commands

 int CmdPSK1rawDemod(const char *Cmd)

1220 {

1221 int ans;

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {

1224 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");

1225 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");

1226 PrintAndLog(" <invert>, 1 for invert output");

1227 PrintAndLog(" [set maximum allowed errors], default = 100.");

1228 PrintAndLog("");

1229 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");

1230 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");

1231 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");

1232 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");

1233 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");

1234 return 0;

1235 }

         ans = PSKDemod(Cmd, true);

1237 //output

1238 if (!ans){

                 if (g_debugMode) PrintAndLog("Error demoding: %d",ans); 

1240 return 0;

1241 }

1242

1243 PrintAndLog("PSK1 demoded bitstream:");

1244 // Now output the bitstream to the scrollback by line of 16 bits

1245 printDemodBuff();

1246 return 1;

1247 }

1248

1249 // by marshmellow

1250 // takes same args as cmdpsk1rawdemod

 int CmdPSK2rawDemod(const char *Cmd)

1252 {

1253 int ans=0;

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {

1256 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");

1257 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");

1258 PrintAndLog(" <invert>, 1 for invert output");

1259 PrintAndLog(" [set maximum allowed errors], default = 100.");

1260 PrintAndLog("");

1261 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");

1262 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");

1263 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");

1264 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");

1265 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");

1266 return 0;

1267 }

         ans=PSKDemod(Cmd, true);

1269 if (!ans){

                 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);  

1271 return 0;

1272 }

1273 psk1TOpsk2(DemodBuffer, DemodBufferLen);

1274 PrintAndLog("PSK2 demoded bitstream:");

1275 // Now output the bitstream to the scrollback by line of 16 bits

1276 printDemodBuff();

1277 return 1;

1278 }

1279

1280 // by marshmellow - combines all raw demod functions into one menu command

 int CmdRawDemod(const char *Cmd)

1282 {

         char cmdp = Cmd[0]; //param_getchar(Cmd, 0);

1284

         if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {

1286 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");

1287 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");

1288 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");

1289 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");

1290 PrintAndLog(" <options> see specific modulation help for optional parameters");

1291 PrintAndLog("");

1292 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");

1293 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");

1294 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");

1295 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");

1296 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");

1297 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");

1298 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");

1299 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");

1300 return 0;

1301 }

         char cmdp2 = Cmd[1];

1303 int ans = 0;

         if (cmdp == 'f' && cmdp2 == 's'){

                 ans = CmdFSKrawdemod(Cmd+2);

         } else if(cmdp == 'a' && cmdp2 == 'b'){

                 ans = Cmdaskbiphdemod(Cmd+2);

         } else if(cmdp == 'a' && cmdp2 == 'm'){

                 ans = Cmdaskmandemod(Cmd+2);

         } else if(cmdp == 'a' && cmdp2 == 'r'){

                 ans = Cmdaskrawdemod(Cmd+2);

         } else if(cmdp == 'n' && cmdp2 == 'r'){

                 ans = CmdNRZrawDemod(Cmd+2);

         } else if(cmdp == 'p' && cmdp2 == '1'){

                 ans = CmdPSK1rawDemod(Cmd+2);

         } else if(cmdp == 'p' && cmdp2 == '2'){

                 ans = CmdPSK2rawDemod(Cmd+2);

1318 } else {

1319 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");

1320 }

1321 return ans;

1322 }

1323

 int CmdGrid(const char *Cmd)

1325 {

         sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);

1327 PlotGridXdefault= PlotGridX;

1328 PlotGridYdefault= PlotGridY;

1329 RepaintGraphWindow();

1330 return 0;

1331 }

1332

 int CmdSetGraphMarkers(const char *Cmd) {

         sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);

1335 RepaintGraphWindow();

1336 return 0;

1337 }

1338

 int CmdHexsamples(const char *Cmd)

1340 {

1341 int i, j;

1342 int requested = 0;

1343 int offset = 0;

1344 char string_buf[25];

1345 char* string_ptr = string_buf;

1346 uint8_t got[BIGBUF_SIZE];

1347

         sscanf(Cmd, "%i %i", &requested, &offset);

1349

1350 /* if no args send something */

         if (requested == 0) {

1352 requested = 8;

1353 }

         if (offset + requested > sizeof(got)) {

                 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);

1356 return 0;

1357 }

1358

         GetFromBigBuf(got,requested,offset);

1360 WaitForResponse(CMD_ACK,NULL);

1361

1362 i = 0;

         for (j = 0; j < requested; j++) {

1364 i++;

                 string_ptr += sprintf(string_ptr, "%02x ", got[j]);

                 if (i == 8) {

                         *(string_ptr - 1) = '\0';    // remove the trailing space

                         PrintAndLog("%s", string_buf);

                         string_buf[0] = '\0';

1370 string_ptr = string_buf;

1371 i = 0;

1372 }

                 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes

                         *(string_ptr - 1) = '\0';

                         PrintAndLog("%s", string_buf);

                         string_buf[0] = '\0';

1377 }

1378 }

1379 return 0;

1380 }

1381

 int CmdHide(const char *Cmd)

1383 {

1384 HideGraphWindow();

1385 return 0;

1386 }

1387

1388 //zero mean GraphBuffer

 int CmdHpf(const char *Cmd)

1390 {

1391 int i;

1392 int accum = 0;

1393

         for (i = 10; i < GraphTraceLen; ++i)

1395 accum += GraphBuffer[i];

1396 accum /= (GraphTraceLen - 10);

         for (i = 0; i < GraphTraceLen; ++i)

1398 GraphBuffer[i] -= accum;

1399

1400 RepaintGraphWindow();

1401 return 0;

1402 }

1403

 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)

1405 {

1406 int i;

1407 uint8_t val = 0;

         for(i =0 ; i < bits_per_sample; i++)

1409 {

                 val |= (headBit(b) << (7-i));

1411 }

1412 return val;

1413 }

1414

 int getSamples(const char *Cmd, bool silent)

1416 {

1417 //If we get all but the last byte in bigbuf,

1418 // we don't have to worry about remaining trash

1419 // in the last byte in case the bits-per-sample

1420 // does not line up on byte boundaries

1421

         uint8_t got[BIGBUF_SIZE-1] = { 0 };

1423

         int n = strtol(Cmd, NULL, 0);

1425

         if (n == 0 || n > sizeof(got))

1427 n = sizeof(got);

1428

         PrintAndLog("Reading %d bytes from device memory\n", n);

         GetFromBigBuf(got,n,0);

1431 PrintAndLog("Data fetched");

1432 UsbCommand response;

1433 WaitForResponse(CMD_ACK, &response);

1434 uint8_t bits_per_sample = 8;

1435

1436 //Old devices without this feature would send 0 at arg[0]

         if(response.arg[0] > 0)

1438 {

                 sample_config *sc = (sample_config *) response.d.asBytes;

                 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample

1441 , sc->decimation);

1442 bits_per_sample = sc->bits_per_sample;

1443 }

         if(bits_per_sample < 8)

1445 {

1446 PrintAndLog("Unpacking...");

                 BitstreamIn bout = { got, bits_per_sample * n,  0};

1448 int j =0;

                 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {

                         uint8_t sample = getByte(bits_per_sample, &bout);

                         GraphBuffer[j] = ((int) sample )- 128;

1452 }

1453 GraphTraceLen = j;

                 PrintAndLog("Unpacked %d samples" , j );

1455 }else

1456 {

                 for (int j = 0; j < n; j++) {

                         GraphBuffer[j] = ((int)got[j]) - 128;

1459 }

1460 GraphTraceLen = n;

1461 }

1462

1463 RepaintGraphWindow();

1464 return 0;

1465 }

1466

 int CmdSamples(const char *Cmd)

1468 {

         return getSamples(Cmd, false);

1470 }

1471

 int CmdTuneSamples(const char *Cmd)

1473 {

         int timeout = 0, arg = FLAG_TUNE_ALL;

1475

         if(*Cmd == 'l') {

1477 arg = FLAG_TUNE_LF;

         } else if (*Cmd == 'h') {

1479 arg = FLAG_TUNE_HF;

         } else if (*Cmd != '\0') {

1481 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");

1482 return 0;

1483 }

1484

         printf("\nMeasuring antenna characteristics, please wait...");

1486

         UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};

1488 SendCommand(&c);

1489

1490 UsbCommand resp;

         while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {

1492 timeout++;

1493 printf(".");

                 if (timeout > 7) {

                         PrintAndLog("\nNo response from Proxmark. Aborting...");

1496 return 1;

1497 }

1498 }

1499

1500 int peakv, peakf;

1501 int vLf125, vLf134, vHf;

         vLf125 = resp.arg[0] & 0xffff;

         vLf134 = resp.arg[0] >> 16;

         vHf = resp.arg[1] & 0xffff;;

         peakf = resp.arg[2] & 0xffff;

         peakv = resp.arg[2] >> 16;

1507 PrintAndLog("");

         PrintAndLog("# LF antenna: %5.2f V @   125.00 kHz", vLf125/1000.0);

         PrintAndLog("# LF antenna: %5.2f V @   134.00 kHz", vLf134/1000.0);

         PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));

         PrintAndLog("# HF antenna: %5.2f V @    13.56 MHz", vHf/1000.0);

1512

1513 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.

1514 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.

1515 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.

1516 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.

1517

1518 if (peakv < LF_UNUSABLE_V)

1519 PrintAndLog("# Your LF antenna is unusable.");

1520 else if (peakv < LF_MARGINAL_V)

1521 PrintAndLog("# Your LF antenna is marginal.");

1522 if (vHf < HF_UNUSABLE_V)

1523 PrintAndLog("# Your HF antenna is unusable.");

1524 else if (vHf < HF_MARGINAL_V)

1525 PrintAndLog("# Your HF antenna is marginal.");

1526

1527 if (peakv >= LF_UNUSABLE_V) {

                 for (int i = 0; i < 256; i++) {

                         GraphBuffer[i] = resp.d.asBytes[i] - 128;

1530 }

                 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");

                 PrintAndLog("\n");

1533 GraphTraceLen = 256;

1534 ShowGraphWindow();

1535 RepaintGraphWindow();

1536 }

1537

1538 return 0;

1539 }

1540

1541

 int CmdLoad(const char *Cmd)

1543 {

         char filename[FILE_PATH_SIZE] = {0x00};

1545 int len = 0;

1546

1547 len = strlen(Cmd);

         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;

         memcpy(filename, Cmd, len);

1550

         FILE *f = fopen(filename, "r");

1552 if (!f) {

                  PrintAndLog("couldn't open '%s'", filename);

1554 return 0;

1555 }

1556

1557 GraphTraceLen = 0;

1558 char line[80];

         while (fgets(line, sizeof (line), f)) {

                 GraphBuffer[GraphTraceLen] = atoi(line);

1561 GraphTraceLen++;

1562 }

1563 fclose(f);

         PrintAndLog("loaded %d samples", GraphTraceLen);

1565 RepaintGraphWindow();

1566 return 0;

1567 }

1568

 int CmdLtrim(const char *Cmd)

1570 {

         int ds = atoi(Cmd);

         if (GraphTraceLen<=0) return 0;

         for (int i = ds; i < GraphTraceLen; ++i)

                 GraphBuffer[i-ds] = GraphBuffer[i];

1575 GraphTraceLen -= ds;

1576

1577 RepaintGraphWindow();

1578 return 0;

1579 }

1580

1581 // trim graph to input argument length

 int CmdRtrim(const char *Cmd)

1583 {

         int ds = atoi(Cmd);

1585

1586 GraphTraceLen = ds;

1587

1588 RepaintGraphWindow();

1589 return 0;

1590 }

1591

1592 // trim graph (middle) piece

 int CmdMtrim(const char *Cmd) {

         int start = 0, stop = 0;

         sscanf(Cmd, "%i %i", &start, &stop);

1596

         if (start > GraphTraceLen       || stop > GraphTraceLen || start > stop) return 0;

1598 start++; //leave start position sample

1599

1600 GraphTraceLen -= stop - start;

         for (int i = 0; i < GraphTraceLen; i++) {

                 GraphBuffer[start+i] = GraphBuffer[stop+i];

1603 }

1604 return 0;

1605 }

1606

1607

 int CmdNorm(const char *Cmd)

1609 {

1610 int i;

         int max = INT_MIN, min = INT_MAX;

1612

         for (i = 10; i < GraphTraceLen; ++i) {

                 if (GraphBuffer[i] > max)

1615 max = GraphBuffer[i];

                 if (GraphBuffer[i] < min)

1617 min = GraphBuffer[i];

1618 }

1619

1620 if (max != min) {

                 for (i = 0; i < GraphTraceLen; ++i) {

                         GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /

1623 (max - min);

1624 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work

1625 }

1626 }

1627 RepaintGraphWindow();

1628 return 0;

1629 }

1630

 int CmdPlot(const char *Cmd)

1632 {

1633 ShowGraphWindow();

1634 return 0;

1635 }

1636

 int CmdSave(const char *Cmd)

1638 {

         char filename[FILE_PATH_SIZE] = {0x00};

1640 int len = 0;

1641

1642 len = strlen(Cmd);

         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;

         memcpy(filename, Cmd, len);

1645

1646

         FILE *f = fopen(filename, "w");

1648 if(!f) {

                 PrintAndLog("couldn't open '%s'", filename);

1650 return 0;

1651 }

1652 int i;

         for (i = 0; i < GraphTraceLen; i++) {

                 fprintf(f, "%d\n", GraphBuffer[i]);

1655 }

1656 fclose(f);

         PrintAndLog("saved to '%s'", Cmd);

1658 return 0;

1659 }

1660

 int CmdScale(const char *Cmd)

1662 {

1663 CursorScaleFactor = atoi(Cmd);

         if (CursorScaleFactor == 0) {

1665 PrintAndLog("bad, can't have zero scale");

1666 CursorScaleFactor = 1;

1667 }

1668 RepaintGraphWindow();

1669 return 0;

1670 }

1671

 int CmdDirectionalThreshold(const char *Cmd)

1673 {

         int8_t upThres = param_get8(Cmd, 0);

         int8_t downThres = param_get8(Cmd, 1);

1676

         printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);

1678

         int lastValue = GraphBuffer[0];

         GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.

1681

         for (int i = 1; i < GraphTraceLen; ++i) {

1683 // Apply first threshold to samples heading up

                 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)

1685 {

1686 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.

1687 GraphBuffer[i] = 127;

1688 }

1689 // Apply second threshold to samples heading down

                 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)

1691 {

1692 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.

1693 GraphBuffer[i] = -127;

1694 }

1695 else

1696 {

1697 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.

                         GraphBuffer[i] = GraphBuffer[i-1];

1699

1700 }

1701 }

         GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.

1703 RepaintGraphWindow();

1704 return 0;

1705 }

1706

 int CmdZerocrossings(const char *Cmd)

1708 {

1709 // Zero-crossings aren't meaningful unless the signal is zero-mean.

1710 CmdHpf("");

1711

1712 int sign = 1;

1713 int zc = 0;

1714 int lastZc = 0;

1715

         for (int i = 0; i < GraphTraceLen; ++i) {

                 if (GraphBuffer[i] * sign >= 0) {

1718 // No change in sign, reproduce the previous sample count.

1719 zc++;

1720 GraphBuffer[i] = lastZc;

1721 } else {

1722 // Change in sign, reset the sample count.

1723 sign = -sign;

1724 GraphBuffer[i] = lastZc;

                         if (sign > 0) {

1726 lastZc = zc;

1727 zc = 0;

1728 }

1729 }

1730 }

1731

1732 RepaintGraphWindow();

1733 return 0;

1734 }

1735

1736 int usage_data_bin2hex(){

1737 PrintAndLog("Usage: data bin2hex <binary_digits>");

1738 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");

1739 return 0;

1740 }

1741

1742 /**

1743 * @brief Utility for conversion via cmdline.

1744 * @param Cmd

1745 * @return

1746 */

 int Cmdbin2hex(const char *Cmd)

1748 {

         int bg =0, en =0;

         if(param_getptr(Cmd, &bg, &en, 0))

1751 {

1752 return usage_data_bin2hex();

1753 }

1754 //Number of digits supplied as argument

         size_t length = en  - bg +1;

         size_t bytelen = (length+7) / 8;

         uint8_t* arr = (uint8_t *) malloc(bytelen);

         memset(arr, 0, bytelen);

         BitstreamOut bout = { arr, 0, 0 };

1760

         for(; bg <= en ;bg++)

1762 {

1763 char c = Cmd[bg];

                 if( c == '1')   pushBit(&bout, 1);

                 else if( c == '0')      pushBit(&bout, 0);

                 else PrintAndLog("Ignoring '%c'", c);

1767 }

1768

         if(bout.numbits % 8 != 0)

1770 {

                 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));

1772 }

1773

1774 //Uses printf instead of PrintAndLog since the latter

1775 // adds linebreaks to each printout - this way was more convenient since we don't have to

1776 // allocate a string and write to that first...

         for(size_t x = 0; x  < bytelen ; x++)

1778 {

                 printf("%02X", arr[x]);

1780 }

         printf("\n");

1782 free(arr);

1783 return 0;

1784 }

1785

1786 int usage_data_hex2bin() {

1787 PrintAndLog("Usage: data hex2bin <hex_digits>");

1788 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");

1789 return 0;

1790

1791 }

1792

 int Cmdhex2bin(const char *Cmd)

1794 {

         int bg =0, en =0;

         if(param_getptr(Cmd, &bg, &en, 0))

1797 {

1798 return usage_data_hex2bin();

1799 }

1800

1801

1802 while(bg <= en )

1803 {

1804 char x = Cmd[bg++];

1805 // capitalize

                 if (x >= 'a' && x <= 'f')

1807 x -= 32;

1808 // convert to numeric value

                 if (x >= '0' && x <= '9')

1810 x -= '0';

                 else if (x >= 'A' && x <= 'F')

                         x -= 'A' - 10;

1813 else

1814 continue;

1815

1816 //Uses printf instead of PrintAndLog since the latter

1817 // adds linebreaks to each printout - this way was more convenient since we don't have to

1818 // allocate a string and write to that first...

1819

                 for(int i= 0 ; i < 4 ; ++i)

                         printf("%d",(x >> (3 - i)) & 1);

1822 }

         printf("\n");

1824

1825 return 0;

1826 }

1827

1828 static command_t CommandTable[] =

1829 {

         {"help",            CmdHelp,            1, "This help"},

         {"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)"},

         {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},

         {"autocorr",        CmdAutoCorr,        1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},

         {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},

         {"bin2hex",         Cmdbin2hex,         1, "bin2hex <digits>     -- Converts binary to hexadecimal"},

         {"bitsamples",      CmdBitsamples,      0, "Get raw samples as bitstring"},

         {"buffclear",       CmdBuffClear,       1, "Clear sample buffer and graph window"},

         {"dec",             CmdDec,             1, "Decimate samples"},

         {"detectclock",     CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},

         {"fdxbdemod",       CmdFDXBdemodBI    , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},

1841 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},

         {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},

         {"getbitstream",    CmdGetBitStream,    1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},

         {"grid",            CmdGrid,            1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},

         {"hexsamples",      CmdHexsamples,      0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},

         {"hex2bin",         Cmdhex2bin,         1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},

         {"hide",            CmdHide,            1, "Hide graph window"},

         {"hpf",             CmdHpf,             1, "Remove DC offset from trace"},

         {"load",            CmdLoad,            1, "<filename> -- Load trace (to graph window"},

         {"ltrim",           CmdLtrim,           1, "<samples> -- Trim samples from left of trace"},

         {"rtrim",           CmdRtrim,           1, "<location to end trace> -- Trim samples from right of trace"},

         {"mtrim",           CmdMtrim,           1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},

         {"manrawdecode",    Cmdmandecoderaw,    1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},

         {"norm",            CmdNorm,            1, "Normalize max/min to +/-128"},

         {"plot",            CmdPlot,            1, "Show graph window (hit 'h' in window for keystroke help)"},

         {"printdemodbuffer",CmdPrintDemodBuff,  1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},

         {"pskindalademod",  CmdIndalaDecode,    1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},

         {"psknexwatchdemod",CmdPSKNexWatch,     1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},

         {"rawdemod",        CmdRawDemod,        1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},  

         {"samples",         CmdSamples,         0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},

         {"save",            CmdSave,            1, "<filename> -- Save trace (from graph window)"},

         {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},

         {"scale",           CmdScale,           1, "<int> -- Set cursor display scale"},

         {"setdebugmode",    CmdSetDebugMode,    1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},

         {"shiftgraphzero",  CmdGraphShiftZero,  1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},

         {"dirthreshold",    CmdDirectionalThreshold,   1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},

         {"tune",            CmdTuneSamples,     0, "Get hw tune samples for graph window"},

         {"undec",           CmdUndec,           1, "Un-decimate samples by 2"},

         {"zerocrossings",   CmdZerocrossings,   1, "Count time between zero-crossings"},

         {NULL, NULL, 0, NULL}

1871 };

1872

 int CmdData(const char *Cmd)

1874 {

1875 CmdsParse(CommandTable, Cmd);

1876 return 0;

1877 }

1878

 int CmdHelp(const char *Cmd)

1880 {

1881 CmdsHelp(CommandTable);

1882 return 0;

1883 }