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FIX: Coverity, strlen(Cmd) can never be lesser than zero.. *douh*
[proxmark3-svn] / client / cmdhf14b.c
1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
3 //
4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
5 // at your option, any later version. See the LICENSE.txt file for the text of
6 // the license.
7 //-----------------------------------------------------------------------------
8 // High frequency ISO14443B commands
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <stdbool.h>
14 #include <stdint.h>
15 #include "iso14443crc.h"
16 #include "proxmark3.h"
17 #include "data.h"
18 #include "graph.h"
19 #include "util.h"
20 #include "ui.h"
21 #include "cmdparser.h"
22 #include "cmdhf14b.h"
23 #include "cmdmain.h"
24 #include "cmdhf14a.h"
25 #include "tea.h"
26 #include "cmdhf.h"
27 #include "prng.h"
28 #include "sha1.h"
29
30 static int CmdHelp(const char *Cmd);
31
32 int CmdHF14BList(const char *Cmd) {
33 CmdHFList("14b");
34 return 0;
35 }
36
37 int CmdHF14BSim(const char *Cmd)
38 {
39 UsbCommand c = {CMD_SIMULATE_TAG_ISO_14443B};
40 clearCommandBuffer();
41 SendCommand(&c);
42 return 0;
43 }
44
45 int CmdHF14BSnoop(const char *Cmd)
46 {
47 UsbCommand c = {CMD_SNOOP_ISO_14443B};
48 clearCommandBuffer();
49 SendCommand(&c);
50 return 0;
51 }
52
53 /* New command to read the contents of a SRI512 tag
54 * SRI512 tags are ISO14443-B modulated memory tags,
55 * this command just dumps the contents of the memory
56 */
57 int CmdSri512Read(const char *Cmd)
58 {
59 UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
60 clearCommandBuffer();
61 SendCommand(&c);
62 return 0;
63 }
64
65 /* New command to read the contents of a SRIX4K tag
66 * SRIX4K tags are ISO14443-B modulated memory tags,
67 * this command just dumps the contents of the memory/
68 */
69 int CmdSrix4kRead(const char *Cmd) {
70 UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
71 clearCommandBuffer();
72 SendCommand(&c);
73 return 0;
74 }
75
76 int rawClose(void){
77 UsbCommand resp;
78 UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}};
79 clearCommandBuffer();
80 SendCommand(&c);
81 if (!WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
82 PrintAndLog("Command time-out");
83 return 1;
84 }
85 return 0;
86 }
87
88 int HF14BCmdRaw(bool reply, bool *crc, bool power, uint8_t *data, uint8_t *datalen, bool verbose){
89
90 if(*crc) {
91 ComputeCrc14443(CRC_14443_B, data, *datalen, data+*datalen, data+*datalen+1);
92 *datalen += 2;
93 }
94
95 UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv,power
96 c.arg[0] = *datalen;
97 c.arg[1] = reply;
98 c.arg[2] = power;
99 memcpy(c.d.asBytes, data, *datalen);
100 clearCommandBuffer();
101 SendCommand(&c);
102
103 if (!reply) return 1;
104
105 UsbCommand resp;
106 if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
107 if (verbose) PrintAndLog("timeout while waiting for reply.");
108 return 0;
109 }
110
111 *datalen = resp.arg[0];
112 if (verbose) PrintAndLog("received %u octets", *datalen);
113 if(*datalen<3) return 0;
114
115 memcpy(data, resp.d.asBytes, *datalen);
116
117 uint8_t first = 0, second = 0;
118 ComputeCrc14443(CRC_14443_B, data, *datalen-2, &first, &second);
119 *crc = ( data[*datalen-2] == first && data[*datalen-1] == second);
120
121 if (verbose)
122 PrintAndLog("[LEN %u] %s[%02X %02X] %s",
123 *datalen,
124 sprint_hex(data, *datalen-2),
125 data[*datalen-2],
126 data[*datalen-1],
127 (*crc)?"OK":"FAIL"
128 );
129
130 return 1;
131 }
132
133 int CmdHF14BCmdRaw (const char *Cmd) {
134 bool reply = true;
135 bool crc = false;
136 bool power = false;
137 bool select = false;
138 bool SRx = false;
139 char buf[5]="";
140 uint8_t data[USB_CMD_DATA_SIZE] = {0x00};
141 uint8_t datalen = 0;
142 unsigned int temp;
143 int i = 0;
144 if (strlen(Cmd)<3) {
145 PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] [-s || -ss] <0A 0B 0C ... hex>");
146 PrintAndLog(" -r do not read response");
147 PrintAndLog(" -c calculate and append CRC");
148 PrintAndLog(" -p leave the field on after receive");
149 PrintAndLog(" -s active signal field ON with select");
150 PrintAndLog(" -ss active signal field ON with select for SRx ST Microelectronics tags");
151 return 0;
152 }
153
154 // strip
155 while (*Cmd==' ' || *Cmd=='\t') Cmd++;
156
157 while (Cmd[i]!='\0') {
158 if (Cmd[i]==' ' || Cmd[i]=='\t') { i++; continue; }
159 if (Cmd[i]=='-') {
160 switch (Cmd[i+1]) {
161 case 'r':
162 case 'R':
163 reply = false;
164 break;
165 case 'c':
166 case 'C':
167 crc = true;
168 break;
169 case 'p':
170 case 'P':
171 power = true;
172 break;
173 case 's':
174 case 'S':
175 select = true;
176 if (Cmd[i+2]=='s' || Cmd[i+2]=='S') {
177 SRx = true;
178 i++;
179 }
180 break;
181 default:
182 PrintAndLog("Invalid option");
183 return 0;
184 }
185 i+=2;
186 continue;
187 }
188 if ((Cmd[i]>='0' && Cmd[i]<='9') ||
189 (Cmd[i]>='a' && Cmd[i]<='f') ||
190 (Cmd[i]>='A' && Cmd[i]<='F') ) {
191 buf[strlen(buf)+1]=0;
192 buf[strlen(buf)]=Cmd[i];
193 i++;
194
195 if (strlen(buf)>=2) {
196 sscanf(buf,"%x",&temp);
197 data[datalen++]=(uint8_t)(temp & 0xff);
198 *buf=0;
199 memset(buf, 0x00, sizeof(buf));
200 }
201 continue;
202 }
203 PrintAndLog("Invalid char on input");
204 return 0;
205 }
206 if (datalen == 0)
207 {
208 PrintAndLog("Missing data input");
209 return 0;
210 }
211
212 if (select){ //auto select 14b tag
213 uint8_t cmd2[16];
214 bool crc2 = true;
215 uint8_t cmdLen;
216
217 if (SRx) {
218 // REQ SRx
219 cmdLen = 2;
220 cmd2[0] = 0x06;
221 cmd2[1] = 0x00;
222 } else {
223 // REQB
224 cmdLen = 3;
225 cmd2[0] = 0x05;
226 cmd2[1] = 0x00;
227 cmd2[2] = 0x08;
228 }
229
230 // REQB
231 if (HF14BCmdRaw(true, &crc2, true, cmd2, &cmdLen, false)==0) return rawClose();
232
233 PrintAndLog("REQB : %s", sprint_hex(cmd2, cmdLen));
234
235 if ( SRx && (cmdLen != 3 || !crc2) ) return rawClose();
236 else if (cmd2[0] != 0x50 || cmdLen != 14 || !crc2) return rawClose();
237
238 uint8_t chipID = 0;
239 if (SRx) {
240 // select
241 chipID = cmd2[0];
242 cmd2[0] = 0x0E;
243 cmd2[1] = chipID;
244 cmdLen = 2;
245 } else {
246 // attrib
247 cmd2[0] = 0x1D;
248 // UID from cmd2[1 - 4]
249 cmd2[5] = 0x00;
250 cmd2[6] = 0x08;
251 cmd2[7] = 0x01;
252 cmd2[8] = 0x00;
253 cmdLen = 9;
254 }
255 // wait
256
257 // attrib
258 if (HF14BCmdRaw(true, &crc2, true, cmd2, &cmdLen, false)==0) return rawClose();
259 PrintAndLog("ATTRIB : %s", sprint_hex(cmd2, cmdLen));
260
261 if (cmdLen != 3 || !crc2) return rawClose();
262 if (SRx && cmd2[0] != chipID) return rawClose();
263
264 }
265 return HF14BCmdRaw(reply, &crc, power, data, &datalen, true);
266 }
267
268 // print full atqb info
269 static void print_atqb_resp(uint8_t *data){
270 //PrintAndLog (" UID: %s", sprint_hex(data+1,4));
271 PrintAndLog (" App Data: %s", sprint_hex(data+5,4));
272 PrintAndLog (" Protocol: %s", sprint_hex(data+9,3));
273 uint8_t BitRate = data[9];
274 if (!BitRate) PrintAndLog (" Bit Rate: 106 kbit/s only PICC <-> PCD");
275 if (BitRate & 0x10) PrintAndLog (" Bit Rate: 212 kbit/s PICC -> PCD supported");
276 if (BitRate & 0x20) PrintAndLog (" Bit Rate: 424 kbit/s PICC -> PCD supported");
277 if (BitRate & 0x40) PrintAndLog (" Bit Rate: 847 kbit/s PICC -> PCD supported");
278 if (BitRate & 0x01) PrintAndLog (" Bit Rate: 212 kbit/s PICC <- PCD supported");
279 if (BitRate & 0x02) PrintAndLog (" Bit Rate: 424 kbit/s PICC <- PCD supported");
280 if (BitRate & 0x04) PrintAndLog (" Bit Rate: 847 kbit/s PICC <- PCD supported");
281 if (BitRate & 0x80) PrintAndLog (" Same bit rate <-> required");
282
283 uint16_t maxFrame = data[10]>>4;
284 if (maxFrame < 5) maxFrame = 8 * maxFrame + 16;
285 else if (maxFrame == 5) maxFrame = 64;
286 else if (maxFrame == 6) maxFrame = 96;
287 else if (maxFrame == 7) maxFrame = 128;
288 else if (maxFrame == 8) maxFrame = 256;
289 else maxFrame = 257;
290
291 PrintAndLog ("Max Frame Size: %u%s",maxFrame, (maxFrame == 257) ? "+ RFU" : "");
292
293 uint8_t protocolT = data[10] & 0xF;
294 PrintAndLog (" Protocol Type: Protocol is %scompliant with ISO/IEC 14443-4",(protocolT) ? "" : "not " );
295 PrintAndLog ("Frame Wait Int: %u", data[11]>>4);
296 PrintAndLog (" App Data Code: Application is %s",(data[11]&4) ? "Standard" : "Proprietary");
297 PrintAndLog (" Frame Options: NAD is %ssupported",(data[11]&2) ? "" : "not ");
298 PrintAndLog (" Frame Options: CID is %ssupported",(data[11]&1) ? "" : "not ");
299 PrintAndLog ("Max Buf Length: %u (MBLI) %s",data[14]>>4, (data[14] & 0xF0) ? "" : "not supported");
300
301 return;
302 }
303
304 // get SRx chip model (from UID) // from ST Microelectronics
305 char *get_ST_Chip_Model(uint8_t data){
306 static char model[20];
307 char *retStr = model;
308 memset(model,0, sizeof(model));
309
310 switch (data) {
311 case 0x0: sprintf(retStr, "SRIX4K (Special)"); break;
312 case 0x2: sprintf(retStr, "SR176"); break;
313 case 0x3: sprintf(retStr, "SRIX4K"); break;
314 case 0x4: sprintf(retStr, "SRIX512"); break;
315 case 0x6: sprintf(retStr, "SRI512"); break;
316 case 0x7: sprintf(retStr, "SRI4K"); break;
317 case 0xC: sprintf(retStr, "SRT512"); break;
318 default : sprintf(retStr, "Unknown"); break;
319 }
320 return retStr;
321 }
322
323 int print_ST_Lock_info(uint8_t model){
324 //assume connection open and tag selected...
325 uint8_t data[16] = {0x00};
326 uint8_t datalen = 2;
327 bool crc = true;
328 uint8_t resplen;
329 uint8_t blk1;
330 data[0] = 0x08;
331
332 if (model == 0x2) { //SR176 has special command:
333 data[1] = 0xf;
334 resplen = 4;
335 } else {
336 data[1] = 0xff;
337 resplen = 6;
338 }
339
340 //std read cmd
341 if (HF14BCmdRaw(true, &crc, true, data, &datalen, false)==0) return rawClose();
342
343 if (datalen != resplen || !crc) return rawClose();
344
345 PrintAndLog("Chip Write Protection Bits:");
346 // now interpret the data
347 switch (model){
348 case 0x0: //fall through (SRIX4K special)
349 case 0x3: //fall through (SRIx4K)
350 case 0x7: // (SRI4K)
351 //only need data[3]
352 blk1 = 9;
353 PrintAndLog(" raw: %s", sprint_bin(data+3, 1));
354 PrintAndLog(" 07/08:%slocked", (data[3] & 1) ? " not " : " " );
355 for (uint8_t i = 1; i<8; i++){
356 PrintAndLog(" %02u:%slocked", blk1, (data[3] & (1 << i)) ? " not " : " " );
357 blk1++;
358 }
359 break;
360 case 0x4: //fall through (SRIX512)
361 case 0x6: //fall through (SRI512)
362 case 0xC: // (SRT512)
363 //need data[2] and data[3]
364 blk1 = 0;
365 PrintAndLog(" raw: %s", sprint_bin(data+2, 2));
366 for (uint8_t b=2; b<4; b++){
367 for (uint8_t i=0; i<8; i++){
368 PrintAndLog(" %02u:%slocked", blk1, (data[b] & (1 << i)) ? " not " : " " );
369 blk1++;
370 }
371 }
372 break;
373 case 0x2: // (SR176)
374 //need data[2]
375 blk1 = 0;
376 PrintAndLog(" raw: %s", sprint_bin(data+2, 1));
377 for (uint8_t i = 0; i<8; i++){
378 PrintAndLog(" %02u/%02u:%slocked", blk1, blk1+1, (data[2] & (1 << i)) ? " " : " not " );
379 blk1+=2;
380 }
381 break;
382 default:
383 return rawClose();
384 }
385 return 1;
386 }
387
388 // print UID info from SRx chips (ST Microelectronics)
389 static void print_st_general_info(uint8_t *data){
390 //uid = first 8 bytes in data
391 PrintAndLog(" UID: %s", sprint_hex(SwapEndian64(data,8,8),8));
392 PrintAndLog(" MFG: %02X, %s", data[6], getTagInfo(data[6]));
393 PrintAndLog("Chip: %02X, %s", data[5]>>2, get_ST_Chip_Model(data[5]>>2));
394 return;
395 }
396
397 // 14b get and print UID only (general info)
398 int HF14BStdReader(uint8_t *data, uint8_t *datalen){
399 //05 00 00 = find one tag in field
400 //1d xx xx xx xx 00 08 01 00 = attrib xx=UID (resp 10 [f9 e0])
401 //a3 = ? (resp 03 [e2 c2])
402 //02 = ? (resp 02 [6a d3])
403 // 022b (resp 02 67 00 [29 5b])
404 // 0200a40400 (resp 02 67 00 [29 5b])
405 // 0200a4040c07a0000002480300 (resp 02 67 00 [29 5b])
406 // 0200a4040c07a0000002480200 (resp 02 67 00 [29 5b])
407 // 0200a4040006a0000000010100 (resp 02 6a 82 [4b 4c])
408 // 0200a4040c09d27600002545500200 (resp 02 67 00 [29 5b])
409 // 0200a404000cd2760001354b414e4d30310000 (resp 02 6a 82 [4b 4c])
410 // 0200a404000ca000000063504b43532d313500 (resp 02 6a 82 [4b 4c])
411 // 0200a4040010a000000018300301000000000000000000 (resp 02 6a 82 [4b 4c])
412 //03 = ? (resp 03 [e3 c2])
413 //c2 = ? (resp c2 [66 15])
414 //b2 = ? (resp a3 [e9 67])
415 //a2 = ? (resp 02 [6a d3])
416 bool crc = true;
417 *datalen = 3;
418 //std read cmd
419 data[0] = 0x05;
420 data[1] = 0x00;
421 data[2] = 0x08;
422
423 if (HF14BCmdRaw(true, &crc, true, data, datalen, false)==0) return rawClose();
424
425 if (data[0] != 0x50 || *datalen != 14 || !crc) return rawClose();
426
427 PrintAndLog ("\n14443-3b tag found:");
428 PrintAndLog (" UID: %s", sprint_hex(data+1,4));
429
430 uint8_t cmd2[16];
431 uint8_t cmdLen = 3;
432 bool crc2 = true;
433
434 cmd2[0] = 0x1D;
435 // UID from data[1 - 4]
436 cmd2[1] = data[1];
437 cmd2[2] = data[2];
438 cmd2[3] = data[3];
439 cmd2[4] = data[4];
440 cmd2[5] = 0x00;
441 cmd2[6] = 0x08;
442 cmd2[7] = 0x01;
443 cmd2[8] = 0x00;
444 cmdLen = 9;
445
446 // attrib
447 if (HF14BCmdRaw(true, &crc2, true, cmd2, &cmdLen, false)==0) return rawClose();
448
449 if (cmdLen != 3 || !crc2) return rawClose();
450 // add attrib responce to data
451 data[14] = cmd2[0];
452 rawClose();
453 return 1;
454 }
455
456 // 14b get and print Full Info (as much as we know)
457 int HF14BStdInfo(uint8_t *data, uint8_t *datalen){
458 if (!HF14BStdReader(data,datalen)) return 0;
459
460 //add more info here
461 print_atqb_resp(data);
462 return 1;
463 }
464
465 // SRx get and print general info about SRx chip from UID
466 int HF14B_ST_Reader(uint8_t *data, uint8_t *datalen, bool closeCon){
467 bool crc = true;
468 *datalen = 2;
469 //wake cmd
470 data[0] = 0x06;
471 data[1] = 0x00;
472
473 //leave power on
474 // verbose on for now for testing - turn off when functional
475 if (HF14BCmdRaw(true, &crc, true, data, datalen, false)==0) return rawClose();
476
477 if (*datalen != 3 || !crc) return rawClose();
478
479 uint8_t chipID = data[0];
480 // select
481 data[0] = 0x0E;
482 data[1] = chipID;
483 *datalen = 2;
484
485 //leave power on
486 if (HF14BCmdRaw(true, &crc, true, data, datalen, false)==0) return rawClose();
487
488 if (*datalen != 3 || !crc || data[0] != chipID) return rawClose();
489
490 // get uid
491 data[0] = 0x0B;
492 *datalen = 1;
493
494 //leave power on
495 if (HF14BCmdRaw(true, &crc, true, data, datalen, false)==0) return rawClose();
496
497 if (*datalen != 10 || !crc) return rawClose();
498
499 //power off ?
500 if (closeCon) rawClose();
501
502 PrintAndLog("\n14443-3b ST tag found:");
503 print_st_general_info(data);
504 return 1;
505 }
506
507 // SRx get and print full info (needs more info...)
508 int HF14B_ST_Info(uint8_t *data, uint8_t *datalen){
509 if (!HF14B_ST_Reader(data, datalen, false)) return 0;
510
511 //add locking bit information here.
512 if (print_ST_Lock_info(data[5]>>2))
513 rawClose();
514
515 return 1;
516 }
517
518 // test for other 14b type tags (mimic another reader - don't have tags to identify)
519 int HF14B_Other_Reader(uint8_t *data, uint8_t *datalen){
520 bool crc = true;
521 *datalen = 4;
522 //std read cmd
523 data[0] = 0x00;
524 data[1] = 0x0b;
525 data[2] = 0x3f;
526 data[3] = 0x80;
527
528 if (HF14BCmdRaw(true, &crc, true, data, datalen, false)!=0) {
529 if (*datalen > 2 || !crc) {
530 PrintAndLog ("\n14443-3b tag found:");
531 PrintAndLog ("Unknown tag type answered to a 0x000b3f80 command ans:");
532 PrintAndLog ("%s",sprint_hex(data,*datalen));
533 rawClose();
534 return 1;
535 }
536 }
537
538 crc = false;
539 *datalen = 1;
540 data[0] = 0x0a;
541
542 if (HF14BCmdRaw(true, &crc, true, data, datalen, false)!=0) {
543 if (*datalen > 0) {
544 PrintAndLog ("\n14443-3b tag found:");
545 PrintAndLog ("Unknown tag type answered to a 0x0A command ans:");
546 PrintAndLog ("%s",sprint_hex(data,*datalen));
547 rawClose();
548 return 1;
549 }
550 }
551
552 crc = false;
553 *datalen = 1;
554 data[0] = 0x0c;
555
556 if (HF14BCmdRaw(true, &crc, true, data, datalen, false)!=0) {
557 if (*datalen > 0) {
558 PrintAndLog ("\n14443-3b tag found:");
559 PrintAndLog ("Unknown tag type answered to a 0x0C command ans:");
560 PrintAndLog ("%s",sprint_hex(data,*datalen));
561 rawClose();
562 return 1;
563 }
564 }
565 rawClose();
566 return 0;
567 }
568
569 // get and print all info known about any known 14b tag
570 int HF14BInfo(bool verbose){
571 uint8_t data[USB_CMD_DATA_SIZE];
572 uint8_t datalen = 5;
573
574 // try std 14b (atqb)
575 if (HF14BStdInfo(data, &datalen)) return 1;
576
577 // try st 14b
578 if (HF14B_ST_Info(data, &datalen)) return 1;
579
580 // try unknown 14b read commands (to be identified later)
581 // could be read of calypso, CEPAS, moneo, or pico pass.
582 if (HF14B_Other_Reader(data, &datalen)) return 1;
583
584 if (verbose) PrintAndLog("no 14443B tag found");
585 return 0;
586 }
587
588 // menu command to get and print all info known about any known 14b tag
589 int CmdHF14Binfo(const char *Cmd){
590 return HF14BInfo(true);
591 }
592
593 // get and print general info about all known 14b chips
594 int HF14BReader(bool verbose){
595 uint8_t data[USB_CMD_DATA_SIZE];
596 uint8_t datalen = 5;
597
598 // try std 14b (atqb)
599 if (HF14BStdReader(data, &datalen)) return 1;
600
601 // try st 14b
602 if (HF14B_ST_Reader(data, &datalen, true)) return 1;
603
604 // try unknown 14b read commands (to be identified later)
605 // could be read of calypso, CEPAS, moneo, or pico pass.
606 if (HF14B_Other_Reader(data, &datalen)) return 1;
607
608 if (verbose) PrintAndLog("no 14443B tag found");
609 return 0;
610 }
611
612 // menu command to get and print general info about all known 14b chips
613 int CmdHF14BReader(const char *Cmd){
614 return HF14BReader(true);
615 }
616
617 int CmdSriWrite( const char *Cmd){
618 /*
619 * For SRIX4K blocks 00 - 7F
620 * hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
621 *
622 * For SR512 blocks 00 - 0F
623 * hf 14b raw -c -p 09 $sr512wblock $sr512wdata
624 *
625 * Special block FF = otp_lock_reg block.
626 * Data len 4 bytes-
627 */
628 char cmdp = param_getchar(Cmd, 0);
629 uint8_t blockno = -1;
630 uint8_t data[4] = {0x00};
631 bool isSrix4k = true;
632 char str[20];
633
634 if (strlen(Cmd) < 1 || cmdp == 'h' || cmdp == 'H') {
635 PrintAndLog("Usage: hf 14b write <1|2> <BLOCK> <DATA>");
636 PrintAndLog(" [1 = SRIX4K]");
637 PrintAndLog(" [2 = SRI512]");
638 PrintAndLog(" [BLOCK number depends on tag, special block == FF]");
639 PrintAndLog(" sample: hf 14b write 1 7F 11223344");
640 PrintAndLog(" : hf 14b write 1 FF 11223344");
641 PrintAndLog(" : hf 14b write 2 15 11223344");
642 PrintAndLog(" : hf 14b write 2 FF 11223344");
643 return 0;
644 }
645
646 if ( cmdp == '2' )
647 isSrix4k = false;
648
649 //blockno = param_get8(Cmd, 1);
650
651 if ( param_gethex(Cmd,1, &blockno, 2) ) {
652 PrintAndLog("Block number must include 2 HEX symbols");
653 return 0;
654 }
655
656 if ( isSrix4k ){
657 if ( blockno > 0x7f && blockno != 0xff ){
658 PrintAndLog("Block number out of range");
659 return 0;
660 }
661 } else {
662 if ( blockno > 0x0f && blockno != 0xff ){
663 PrintAndLog("Block number out of range");
664 return 0;
665 }
666 }
667
668 if (param_gethex(Cmd, 2, data, 8)) {
669 PrintAndLog("Data must include 8 HEX symbols");
670 return 0;
671 }
672
673 if ( blockno == 0xff)
674 PrintAndLog("[%s] Write special block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512" , blockno, sprint_hex(data,4) );
675 else
676 PrintAndLog("[%s] Write block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512", blockno, sprint_hex(data,4) );
677
678 sprintf(str, "-c 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);
679
680 CmdHF14BCmdRaw(str);
681 return 0;
682 }
683
684 uint32_t srix4kEncode(uint32_t value) {
685 /*
686 // vv = value
687 // pp = position
688 // vv vv vv pp
689 4 bytes : 00 1A 20 01
690 */
691
692 #define NibbleHigh(b) ( (b & 0xF0) >> 4 )
693 #define NibbleLow(b) ( b & 0x0F )
694 #define Crumb(b,p) (((b & (0x3 << p) ) >> p ) & 0xF)
695
696 // only the lower crumbs.
697 uint8_t block = (value & 0xFF);
698 uint8_t i = 0;
699 uint8_t valuebytes[] = {0,0,0};
700
701 num_to_bytes(value, 3, valuebytes);
702
703 // Scrambled part
704 // Crumb swapping of value.
705 uint8_t temp[] = {0,0};
706 temp[0] = (Crumb(value, 22) << 4 | Crumb(value, 14 ) << 2 | Crumb(value, 6)) << 4;
707 temp[0] |= Crumb(value, 20) << 4 | Crumb(value, 12 ) << 2 | Crumb(value, 4);
708 temp[1] = (Crumb(value, 18) << 4 | Crumb(value, 10 ) << 2 | Crumb(value, 2)) << 4;
709 temp[1] |= Crumb(value, 16) << 4 | Crumb(value, 8 ) << 2 | Crumb(value, 0);
710
711 // chksum part
712 uint32_t chksum = 0xFF - block;
713
714 // chksum is reduced by each nibbles of value.
715 for (i = 0; i < 3; ++i){
716 chksum -= NibbleHigh(valuebytes[i]);
717 chksum -= NibbleLow(valuebytes[i]);
718 }
719
720 // base4 conversion and left shift twice
721 i = 3;
722 uint8_t base4[] = {0,0,0,0};
723 while( chksum !=0 ){
724 base4[i--] = (chksum % 4 << 2);
725 chksum /= 4;
726 }
727
728 // merge scambled and chksum parts
729 uint32_t encvalue =
730 ( NibbleLow ( base4[0]) << 28 ) |
731 ( NibbleHigh( temp[0]) << 24 ) |
732
733 ( NibbleLow ( base4[1]) << 20 ) |
734 ( NibbleLow ( temp[0]) << 16 ) |
735
736 ( NibbleLow ( base4[2]) << 12 ) |
737 ( NibbleHigh( temp[1]) << 8 ) |
738
739 ( NibbleLow ( base4[3]) << 4 ) |
740 NibbleLow ( temp[1] );
741
742 PrintAndLog("ICE encoded | %08X -> %08X", value, encvalue);
743 return encvalue;
744 }
745 uint32_t srix4kDecode(uint32_t value) {
746 switch(value) {
747 case 0xC04F42C5: return 0x003139;
748 case 0xC1484807: return 0x002943;
749 case 0xC0C60848: return 0x001A20;
750 }
751 return 0;
752 }
753 uint32_t srix4kDecodeCounter(uint32_t num) {
754 uint32_t value = ~num;
755 ++value;
756 return value;
757 }
758
759 uint32_t srix4kGetMagicbytes( uint64_t uid, uint32_t block6, uint32_t block18, uint32_t block19 ){
760 #define MASK 0xFFFFFFFF;
761 uint32_t uid32 = uid & MASK;
762 uint32_t counter = srix4kDecodeCounter(block6);
763 uint32_t decodedBlock18 = srix4kDecode(block18);
764 uint32_t decodedBlock19 = srix4kDecode(block19);
765 uint32_t doubleBlock = (decodedBlock18 << 16 | decodedBlock19) + 1;
766
767 uint32_t result = (uid32 * doubleBlock * counter) & MASK;
768 PrintAndLog("Magic bytes | %08X", result);
769 return result;
770 }
771 int srix4kValid(const char *Cmd){
772
773 uint64_t uid = 0xD00202501A4532F9;
774 uint32_t block6 = 0xFFFFFFFF;
775 uint32_t block18 = 0xC04F42C5;
776 uint32_t block19 = 0xC1484807;
777 uint32_t block21 = 0xD1BCABA4;
778
779 uint32_t test_b18 = 0x00313918;
780 uint32_t test_b18_enc = srix4kEncode(test_b18);
781 //uint32_t test_b18_dec = srix4kDecode(test_b18_enc);
782 PrintAndLog("ENCODE & CHECKSUM | %08X -> %08X (%s)", test_b18, test_b18_enc , "");
783
784 uint32_t magic = srix4kGetMagicbytes(uid, block6, block18, block19);
785 PrintAndLog("BLOCK 21 | %08X -> %08X (no XOR)", block21, magic ^ block21);
786 return 0;
787 }
788
789 int CmdteaSelfTest(const char *Cmd){
790
791 uint8_t v[8], v_le[8];
792 memset(v, 0x00, sizeof(v));
793 memset(v_le, 0x00, sizeof(v_le));
794 uint8_t* v_ptr = v_le;
795
796 uint8_t cmdlen = strlen(Cmd);
797 cmdlen = ( sizeof(v)<<2 < cmdlen ) ? sizeof(v)<<2 : cmdlen;
798
799 if ( param_gethex(Cmd, 0, v, cmdlen) > 0 ){
800 PrintAndLog("can't read hex chars, uneven? :: %u", cmdlen);
801 return 1;
802 }
803
804 SwapEndian64ex(v , 8, 4, v_ptr);
805
806 // ENCRYPTION KEY:
807
808 uint8_t key[16] = {0x00};
809 uint8_t keyle[16];
810 uint8_t* key_ptr = keyle;
811 SwapEndian64ex(key , sizeof(key), 4, key_ptr);
812
813 PrintAndLog("TEST LE enc| %s", sprint_hex(v_ptr, 8));
814
815 tea_decrypt(v_ptr, key_ptr);
816 PrintAndLog("TEST LE dec | %s", sprint_hex_ascii(v_ptr, 8));
817
818 tea_encrypt(v_ptr, key_ptr);
819 tea_encrypt(v_ptr, key_ptr);
820 PrintAndLog("TEST enc2 | %s", sprint_hex_ascii(v_ptr, 8));
821
822 return 0;
823 }
824
825 static command_t CommandTable[] = {
826 {"help", CmdHelp, 1, "This help"},
827 {"info", CmdHF14Binfo, 0, "Find and print details about a 14443B tag"},
828 {"list", CmdHF14BList, 0, "[Deprecated] List ISO 14443B history"},
829 {"reader", CmdHF14BReader, 0, "Act as a 14443B reader to identify a tag"},
830 {"sim", CmdHF14BSim, 0, "Fake ISO 14443B tag"},
831 {"snoop", CmdHF14BSnoop, 0, "Eavesdrop ISO 14443B"},
832 {"sri512read", CmdSri512Read, 0, "Read contents of a SRI512 tag"},
833 {"srix4kread", CmdSrix4kRead, 0, "Read contents of a SRIX4K tag"},
834 {"sriwrite", CmdSriWrite, 0, "Write data to a SRI512 | SRIX4K tag"},
835 {"raw", CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
836 //{"valid", srix4kValid, 1, "srix4k checksum test"},
837 {"valid", CmdteaSelfTest, 1, "tea test"},
838 {NULL, NULL, 0, NULL}
839 };
840
841 int CmdHF14B(const char *Cmd) {
842 clearCommandBuffer();
843 CmdsParse(CommandTable, Cmd);
844 return 0;
845 }
846
847 int CmdHelp(const char *Cmd) {
848 CmdsHelp(CommandTable);
849 return 0;
850 }
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