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Fix #1 for pm3 iclass simulation, remove erroneous extra bit after transmission
[proxmark3-svn] / client / cmdhf14b.c
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1//-----------------------------------------------------------------------------
2// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
3//
4// This code is licensed to you under the terms of the GNU GPL, version 2 or,
5// at your option, any later version. See the LICENSE.txt file for the text of
6// the license.
7//-----------------------------------------------------------------------------
8// High frequency ISO14443B commands
9//-----------------------------------------------------------------------------
10
11#include <stdio.h>
12#include <stdlib.h>
13#include <stdbool.h>
14#include <string.h>
15#include <stdint.h>
16#include "iso14443crc.h"
17#include "proxmark3.h"
18#include "data.h"
19#include "graph.h"
20#include "util.h"
21#include "ui.h"
22#include "cmdparser.h"
23#include "cmdhf14b.h"
24#include "cmdmain.h"
25
26static int CmdHelp(const char *Cmd);
27
28int CmdHF14BDemod(const char *Cmd)
29{
30 int i, j, iold;
31 int isum, qsum;
32 int outOfWeakAt;
33 bool negateI, negateQ;
34
35 uint8_t data[256];
36 int dataLen = 0;
37
38 // As received, the samples are pairs, correlations against I and Q
39 // square waves. So estimate angle of initial carrier (or just
40 // quadrant, actually), and then do the demod.
41
42 // First, estimate where the tag starts modulating.
43 for (i = 0; i < GraphTraceLen; i += 2) {
44 if (abs(GraphBuffer[i]) + abs(GraphBuffer[i + 1]) > 40) {
45 break;
46 }
47 }
48 if (i >= GraphTraceLen) {
49 PrintAndLog("too weak to sync");
50 return 0;
51 }
52 PrintAndLog("out of weak at %d", i);
53 outOfWeakAt = i;
54
55 // Now, estimate the phase in the initial modulation of the tag
56 isum = 0;
57 qsum = 0;
58 for (; i < (outOfWeakAt + 16); i += 2) {
59 isum += GraphBuffer[i + 0];
60 qsum += GraphBuffer[i + 1];
61 }
62 negateI = (isum < 0);
63 negateQ = (qsum < 0);
64
65 // Turn the correlation pairs into soft decisions on the bit.
66 j = 0;
67 for (i = 0; i < GraphTraceLen / 2; i++) {
68 int si = GraphBuffer[j];
69 int sq = GraphBuffer[j + 1];
70 if (negateI) si = -si;
71 if (negateQ) sq = -sq;
72 GraphBuffer[i] = si + sq;
73 j += 2;
74 }
75 GraphTraceLen = i;
76
77 i = outOfWeakAt / 2;
78 while (GraphBuffer[i] > 0 && i < GraphTraceLen)
79 i++;
80 if (i >= GraphTraceLen) goto demodError;
81
82 iold = i;
83 while (GraphBuffer[i] < 0 && i < GraphTraceLen)
84 i++;
85 if (i >= GraphTraceLen) goto demodError;
86 if ((i - iold) > 23) goto demodError;
87
88 PrintAndLog("make it to demod loop");
89
90 for (;;) {
91 iold = i;
92 while (GraphBuffer[i] >= 0 && i < GraphTraceLen)
93 i++;
94 if (i >= GraphTraceLen) goto demodError;
95 if ((i - iold) > 6) goto demodError;
96
97 uint16_t shiftReg = 0;
98 if (i + 20 >= GraphTraceLen) goto demodError;
99
100 for (j = 0; j < 10; j++) {
101 int soft = GraphBuffer[i] + GraphBuffer[i + 1];
102
103 if (abs(soft) < (abs(isum) + abs(qsum)) / 20) {
104 PrintAndLog("weak bit");
105 }
106
107 shiftReg >>= 1;
108 if(GraphBuffer[i] + GraphBuffer[i+1] >= 0) {
109 shiftReg |= 0x200;
110 }
111
112 i+= 2;
113 }
114
115 if ((shiftReg & 0x200) && !(shiftReg & 0x001))
116 {
117 // valid data byte, start and stop bits okay
118 PrintAndLog(" %02x", (shiftReg >> 1) & 0xff);
119 data[dataLen++] = (shiftReg >> 1) & 0xff;
120 if (dataLen >= sizeof(data)) {
121 return 0;
122 }
123 } else if (shiftReg == 0x000) {
124 // this is EOF
125 break;
126 } else {
127 goto demodError;
128 }
129 }
130
131 uint8_t first, second;
132 ComputeCrc14443(CRC_14443_B, data, dataLen-2, &first, &second);
133 PrintAndLog("CRC: %02x %02x (%s)\n", first, second,
134 (first == data[dataLen-2] && second == data[dataLen-1]) ?
135 "ok" : "****FAIL****");
136
137 RepaintGraphWindow();
138 return 0;
139
140demodError:
141 PrintAndLog("demod error");
142 RepaintGraphWindow();
143 return 0;
144}
145
146int CmdHF14BList(const char *Cmd)
147{
148 uint8_t *got = malloc(USB_CMD_DATA_SIZE);
149
150 // Query for the actual size of the trace
151 UsbCommand response;
152 GetFromBigBuf(got, USB_CMD_DATA_SIZE, 0);
153 WaitForResponse(CMD_ACK, &response);
154 uint16_t traceLen = response.arg[2];
155 if (traceLen > USB_CMD_DATA_SIZE) {
156 uint8_t *p = realloc(got, traceLen);
157 if (p == NULL) {
158 PrintAndLog("Cannot allocate memory for trace");
159 free(got);
160 return 2;
161 }
162 got = p;
163 GetFromBigBuf(got, traceLen, 0);
164 WaitForResponse(CMD_ACK,NULL);
165 }
166 PrintAndLog("recorded activity: (TraceLen = %d bytes)", traceLen);
167 PrintAndLog(" time :rssi: who bytes");
168 PrintAndLog("---------+----+----+-----------");
169
170 int i = 0;
171 int prev = -1;
172
173 for(;;) {
174
175 if(i >= traceLen) { break; }
176
177 bool isResponse;
178 int timestamp = *((uint32_t *)(got+i));
179 if(timestamp & 0x80000000) {
180 timestamp &= 0x7fffffff;
181 isResponse = 1;
182 } else {
183 isResponse = 0;
184 }
185 int metric = *((uint32_t *)(got+i+4));
186
187 int len = got[i+8];
188
189 if(len > 100) {
190 break;
191 }
192 if(i + len >= traceLen) {
193 break;
194 }
195
196 uint8_t *frame = (got+i+9);
197
198 // Break and stick with current result if buffer was not completely full
199 if (frame[0] == 0x44 && frame[1] == 0x44 && frame[2] == 0x44 && frame[3] == 0x44) break;
200
201 char line[1000] = "";
202 int j;
203 for(j = 0; j < len; j++) {
204 sprintf(line+(j*3), "%02x ", frame[j]);
205 }
206
207 char *crc;
208 if(len > 2) {
209 uint8_t b1, b2;
210 ComputeCrc14443(CRC_14443_B, frame, len-2, &b1, &b2);
211 if(b1 != frame[len-2] || b2 != frame[len-1]) {
212 crc = "**FAIL CRC**";
213 } else {
214 crc = "";
215 }
216 } else {
217 crc = "(SHORT)";
218 }
219
220 char metricString[100];
221 if(isResponse) {
222 sprintf(metricString, "%3d", metric);
223 } else {
224 strcpy(metricString, " ");
225 }
226
227 PrintAndLog(" +%7d: %s: %s %s %s",
228 (prev < 0 ? 0 : timestamp - prev),
229 metricString,
230 (isResponse ? "TAG" : " "), line, crc);
231
232 prev = timestamp;
233 i += (len + 9);
234 }
235 free(got);
236 return 0;
237}
238
239int CmdHF14BRead(const char *Cmd)
240{
241 UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443, {strtol(Cmd, NULL, 0), 0, 0}};
242 SendCommand(&c);
243 return 0;
244}
245
246int CmdHF14Sim(const char *Cmd)
247{
248 UsbCommand c={CMD_SIMULATE_TAG_ISO_14443};
249 SendCommand(&c);
250 return 0;
251}
252
253int CmdHFSimlisten(const char *Cmd)
254{
255 UsbCommand c = {CMD_SIMULATE_TAG_HF_LISTEN};
256 SendCommand(&c);
257 return 0;
258}
259
260int CmdHF14BSnoop(const char *Cmd)
261{
262 UsbCommand c = {CMD_SNOOP_ISO_14443};
263 SendCommand(&c);
264 return 0;
265}
266
267/* New command to read the contents of a SRI512 tag
268 * SRI512 tags are ISO14443-B modulated memory tags,
269 * this command just dumps the contents of the memory
270 */
271int CmdSri512Read(const char *Cmd)
272{
273 UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
274 SendCommand(&c);
275 return 0;
276}
277
278/* New command to read the contents of a SRIX4K tag
279 * SRIX4K tags are ISO14443-B modulated memory tags,
280 * this command just dumps the contents of the memory/
281 */
282int CmdSrix4kRead(const char *Cmd)
283{
284 UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
285 SendCommand(&c);
286 return 0;
287}
288
289int CmdHF14BCmdRaw (const char *cmd) {
290 UsbCommand resp;
291 uint8_t *recv;
292 UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv?
293 uint8_t reply=1;
294 uint8_t crc=0;
295 uint8_t power=0;
296 char buf[5]="";
297 int i=0;
298 uint8_t data[100] = {0x00};
299 unsigned int datalen=0, temp;
300 char *hexout;
301
302 if (strlen(cmd)<3) {
303 PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] <0A 0B 0C ... hex>");
304 PrintAndLog(" -r do not read response");
305 PrintAndLog(" -c calculate and append CRC");
306 PrintAndLog(" -p leave the field on after receive");
307 return 0;
308 }
309
310 // strip
311 while (*cmd==' ' || *cmd=='\t') cmd++;
312
313 while (cmd[i]!='\0') {
314 if (cmd[i]==' ' || cmd[i]=='\t') { i++; continue; }
315 if (cmd[i]=='-') {
316 switch (cmd[i+1]) {
317 case 'r':
318 case 'R':
319 reply=0;
320 break;
321 case 'c':
322 case 'C':
323 crc=1;
324 break;
325 case 'p':
326 case 'P':
327 power=1;
328 break;
329 default:
330 PrintAndLog("Invalid option");
331 return 0;
332 }
333 i+=2;
334 continue;
335 }
336 if ((cmd[i]>='0' && cmd[i]<='9') ||
337 (cmd[i]>='a' && cmd[i]<='f') ||
338 (cmd[i]>='A' && cmd[i]<='F') ) {
339 buf[strlen(buf)+1]=0;
340 buf[strlen(buf)]=cmd[i];
341 i++;
342
343 if (strlen(buf)>=2) {
344 sscanf(buf,"%x",&temp);
345 data[datalen]=(uint8_t)(temp & 0xff);
346 datalen++;
347 *buf=0;
348 }
349 continue;
350 }
351 PrintAndLog("Invalid char on input");
352 return 1;
353 }
354 if (datalen == 0)
355 {
356 PrintAndLog("Missing data input");
357 return 0;
358 }
359 if(crc)
360 {
361 uint8_t first, second;
362 ComputeCrc14443(CRC_14443_B, data, datalen, &first, &second);
363 data[datalen++] = first;
364 data[datalen++] = second;
365 }
366
367 c.arg[0] = datalen;
368 c.arg[1] = reply;
369 c.arg[2] = power;
370 memcpy(c.d.asBytes,data,datalen);
371
372 SendCommand(&c);
373
374 if (reply) {
375 if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
376 recv = resp.d.asBytes;
377 PrintAndLog("received %i octets",resp.arg[0]);
378 if(!resp.arg[0])
379 return 0;
380 hexout = (char *)malloc(resp.arg[0] * 3 + 1);
381 if (hexout != NULL) {
382 uint8_t first, second;
383 for (int i = 0; i < resp.arg[0]; i++) { // data in hex
384 sprintf(&hexout[i * 3], "%02X ", recv[i]);
385 }
386 PrintAndLog("%s", hexout);
387 free(hexout);
388 ComputeCrc14443(CRC_14443_B, recv, resp.arg[0]-2, &first, &second);
389 if(recv[resp.arg[0]-2]==first && recv[resp.arg[0]-1]==second) {
390 PrintAndLog("CRC OK");
391 } else {
392 PrintAndLog("CRC failed");
393 }
394 } else {
395 PrintAndLog("malloc failed your client has low memory?");
396 }
397 } else {
398 PrintAndLog("timeout while waiting for reply.");
399 }
400 } // if reply
401 return 0;
402}
403
404int CmdHF14BWrite( const char *Cmd){
405
406/*
407 * For SRIX4K blocks 00 - 7F
408 * hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
409 *
410 * For SR512 blocks 00 - 0F
411 * hf 14b raw -c -p 09 $sr512wblock $sr512wdata
412 *
413 * Special block FF = otp_lock_reg block.
414 * Data len 4 bytes-
415 */
416 char cmdp = param_getchar(Cmd, 0);
417 uint8_t blockno = -1;
418 uint8_t data[4] = {0x00};
419 bool isSrix4k = true;
420 char str[20];
421
422 if (strlen(Cmd) < 1 || cmdp == 'h' || cmdp == 'H') {
423 PrintAndLog("Usage: hf 14b write <1|2> <BLOCK> <DATA>");
424 PrintAndLog(" [1 = SRIX4K]");
425 PrintAndLog(" [2 = SRI512]");
426 PrintAndLog(" [BLOCK number depends on tag, special block == FF]");
427 PrintAndLog(" sample: hf 14b write 1 7F 11223344");
428 PrintAndLog(" : hf 14b write 1 FF 11223344");
429 PrintAndLog(" : hf 14b write 2 15 11223344");
430 PrintAndLog(" : hf 14b write 2 FF 11223344");
431 return 0;
432 }
433
434 if ( cmdp == '2' )
435 isSrix4k = false;
436
437 //blockno = param_get8(Cmd, 1);
438
439 if ( param_gethex(Cmd,1, &blockno, 2) ) {
440 PrintAndLog("Block number must include 2 HEX symbols");
441 return 0;
442 }
443
444 if ( isSrix4k ){
445 if ( blockno > 0x7f && blockno != 0xff ){
446 PrintAndLog("Block number out of range");
447 return 0;
448 }
449 } else {
450 if ( blockno > 0x0f && blockno != 0xff ){
451 PrintAndLog("Block number out of range");
452 return 0;
453 }
454 }
455
456 if (param_gethex(Cmd, 2, data, 8)) {
457 PrintAndLog("Data must include 8 HEX symbols");
458 return 0;
459 }
460
461 if ( blockno == 0xff)
462 PrintAndLog("[%s] Write special block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512" , blockno, sprint_hex(data,4) );
463 else
464 PrintAndLog("[%s] Write block %02X [ %s ]", (isSrix4k)?"SRIX4K":"SRI512", blockno, sprint_hex(data,4) );
465
466 sprintf(str, "-c 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);
467
468 CmdHF14BCmdRaw(str);
469 return 0;
470}
471
472static command_t CommandTable[] =
473{
474 {"help", CmdHelp, 1, "This help"},
475 {"demod", CmdHF14BDemod, 1, "Demodulate ISO14443 Type B from tag"},
476 {"list", CmdHF14BList, 0, "List ISO 14443 history"},
477 {"read", CmdHF14BRead, 0, "Read HF tag (ISO 14443)"},
478 {"sim", CmdHF14Sim, 0, "Fake ISO 14443 tag"},
479 {"simlisten", CmdHFSimlisten, 0, "Get HF samples as fake tag"},
480 {"snoop", CmdHF14BSnoop, 0, "Eavesdrop ISO 14443"},
481 {"sri512read", CmdSri512Read, 0, "Read contents of a SRI512 tag"},
482 {"srix4kread", CmdSrix4kRead, 0, "Read contents of a SRIX4K tag"},
483 {"raw", CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
484 {"write", CmdHF14BWrite, 0, "Write data to a SRI512 | SRIX4K tag"},
485 {NULL, NULL, 0, NULL}
486};
487
488int CmdHF14B(const char *Cmd)
489{
490 CmdsParse(CommandTable, Cmd);
491 return 0;
492}
493
494int CmdHelp(const char *Cmd)
495{
496 CmdsHelp(CommandTable);
497 return 0;
498}
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