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[proxmark3-svn] / client / cmdlfhitag.c
1 //-----------------------------------------------------------------------------
2 // Copyright (C) 2012 Roel Verdult
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 // Low frequency Hitag support
9 //-----------------------------------------------------------------------------
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include "data.h"
15 #include "proxmark3.h"
16 #include "ui.h"
17 #include "cmdparser.h"
18 #include "common.h"
19 #include "util.h"
20 #include "hitag2.h"
21 #include "hitagS.h"
22 #include "sleep.h"
23 #include "cmdmain.h"
24
25 static int CmdHelp(const char *Cmd);
26
27 size_t nbytes(size_t nbits) {
28 return (nbits/8)+((nbits%8)>0);
29 }
30
31 int CmdLFHitagList(const char *Cmd) {
32 uint8_t *got = malloc(USB_CMD_DATA_SIZE);
33
34 // Query for the actual size of the trace
35 UsbCommand response;
36 GetFromBigBuf(got, USB_CMD_DATA_SIZE, 0);
37 WaitForResponse(CMD_ACK, &response);
38 uint16_t traceLen = response.arg[2];
39 if (traceLen > USB_CMD_DATA_SIZE) {
40 uint8_t *p = realloc(got, traceLen);
41 if (p == NULL) {
42 PrintAndLog("Cannot allocate memory for trace");
43 free(got);
44 return 2;
45 }
46 got = p;
47 GetFromBigBuf(got, traceLen, 0);
48 WaitForResponse(CMD_ACK,NULL);
49 }
50
51 PrintAndLog("recorded activity (TraceLen = %d bytes):");
52 PrintAndLog(" ETU :nbits: who bytes");
53 PrintAndLog("---------+-----+----+-----------");
54
55 int i = 0;
56 int prev = -1;
57 int len = strlen(Cmd);
58
59 char filename[FILE_PATH_SIZE] = { 0x00 };
60 FILE* f = NULL;
61
62 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
63 memcpy(filename, Cmd, len);
64
65 if (strlen(filename) > 0) {
66 f = fopen(filename,"wb");
67 if (!f) {
68 PrintAndLog("Error: Could not open file [%s]",filename);
69 return 1;
70 }
71 }
72
73 for (;;) {
74
75 if(i >= traceLen) { break; }
76
77 bool isResponse;
78 int timestamp = *((uint32_t *)(got+i));
79 if (timestamp & 0x80000000) {
80 timestamp &= 0x7fffffff;
81 isResponse = 1;
82 } else {
83 isResponse = 0;
84 }
85
86 int parityBits = *((uint32_t *)(got+i+4));
87 // 4 bytes of additional information...
88 // maximum of 32 additional parity bit information
89 //
90 // TODO:
91 // at each quarter bit period we can send power level (16 levels)
92 // or each half bit period in 256 levels.
93
94 int bits = got[i+8];
95 int len = nbytes(got[i+8]);
96
97 if (len > 100) {
98 break;
99 }
100 if (i + len > traceLen) { break;}
101
102 uint8_t *frame = (got+i+9);
103
104 // Break and stick with current result if buffer was not completely full
105 if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
106
107 char line[1000] = "";
108 int j;
109 for (j = 0; j < len; j++) {
110 int oddparity = 0x01;
111 int k;
112
113 for (k=0;k<8;k++) {
114 oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
115 }
116
117 //if((parityBits >> (len - j - 1)) & 0x01) {
118 if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
119 sprintf(line+(j*4), "%02x! ", frame[j]);
120 }
121 else {
122 sprintf(line+(j*4), "%02x ", frame[j]);
123 }
124 }
125
126 PrintAndLog(" +%7d: %3d: %s %s",
127 (prev < 0 ? 0 : (timestamp - prev)),
128 bits,
129 (isResponse ? "TAG" : " "),
130 line);
131
132 if (f) {
133 fprintf(f," +%7d: %3d: %s %s\n",
134 (prev < 0 ? 0 : (timestamp - prev)),
135 bits,
136 (isResponse ? "TAG" : " "),
137 line);
138 }
139
140 prev = timestamp;
141 i += (len + 9);
142 }
143
144 if (f) {
145 fclose(f);
146 PrintAndLog("Recorded activity succesfully written to file: %s", filename);
147 }
148
149 free(got);
150 return 0;
151 }
152
153 int CmdLFHitagSnoop(const char *Cmd) {
154 UsbCommand c = {CMD_SNOOP_HITAG};
155 clearCommandBuffer();
156 SendCommand(&c);
157 return 0;
158 }
159
160 int CmdLFHitagSim(const char *Cmd) {
161
162 UsbCommand c = {CMD_SIMULATE_HITAG};
163 char filename[FILE_PATH_SIZE] = { 0x00 };
164 FILE* f;
165 bool tag_mem_supplied;
166
167 int len = strlen(Cmd);
168 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
169 memcpy(filename, Cmd, len);
170
171 if (strlen(filename) > 0) {
172 f = fopen(filename,"rb+");
173 if (!f) {
174 PrintAndLog("Error: Could not open file [%s]",filename);
175 return 1;
176 }
177 tag_mem_supplied = true;
178 size_t bytes_read = fread(c.d.asBytes, 48, 1, f);
179 if ( bytes_read == 0) {
180 PrintAndLog("Error: File reading error");
181 fclose(f);
182 return 1;
183 }
184 fclose(f);
185 } else {
186 tag_mem_supplied = false;
187 }
188
189 // Does the tag comes with memory
190 c.arg[0] = (uint32_t)tag_mem_supplied;
191 clearCommandBuffer();
192 SendCommand(&c);
193 return 0;
194 }
195
196 int CmdLFHitagReader(const char *Cmd) {
197
198 UsbCommand c = {CMD_READER_HITAG};//, {param_get32ex(Cmd,0,0,10),param_get32ex(Cmd,1,0,16),param_get32ex(Cmd,2,0,16),param_get32ex(Cmd,3,0,16)}};
199 hitag_data* htd = (hitag_data*)c.d.asBytes;
200 hitag_function htf = param_get32ex(Cmd,0,0,10);
201
202 switch (htf) {
203 case 01: { //RHTSF_CHALLENGE
204 c = (UsbCommand){ CMD_READ_HITAG_S };
205 num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
206 num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
207 } break;
208 case 02: { //RHTSF_KEY
209 c = (UsbCommand){ CMD_READ_HITAG_S };
210 num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
211 } break;
212 case RHT2F_PASSWORD: {
213 num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
214 } break;
215 case RHT2F_AUTHENTICATE: {
216 num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
217 num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
218 } break;
219 case RHT2F_CRYPTO: {
220 num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
221 } break;
222 case RHT2F_TEST_AUTH_ATTEMPTS: {
223 // No additional parameters needed
224 } break;
225 case RHT2F_UID_ONLY: {
226 // No additional parameters needed
227 } break;
228 default: {
229 PrintAndLog("\nError: unkown reader function %d",htf);
230 PrintAndLog("");
231 PrintAndLog("Usage: hitag reader <Reader Function #>");
232 PrintAndLog("Reader Functions:");
233 PrintAndLog(" HitagS (0*)");
234 PrintAndLog(" 01 <nr> <ar> (Challenge) read all pages from a Hitag S tag");
235 PrintAndLog(" 02 <key> (set to 0 if no authentication is needed) read all pages from a Hitag S tag");
236 PrintAndLog(" Hitag1 (1*)");
237 PrintAndLog(" Hitag2 (2*)");
238 PrintAndLog(" 21 <password> (password mode)");
239 PrintAndLog(" 22 <nr> <ar> (authentication)");
240 PrintAndLog(" 23 <key> (authentication) key is in format: ISK high + ISK low");
241 PrintAndLog(" 25 (test recorded authentications)");
242 PrintAndLog(" 26 just read UID");
243 return 1;
244 } break;
245 }
246
247 // Copy the hitag2 function into the first argument
248 c.arg[0] = htf;
249 clearCommandBuffer();
250 SendCommand(&c);
251 UsbCommand resp;
252 WaitForResponse(CMD_ACK,&resp);
253
254 // Check the return status, stored in the first argument
255 if (resp.arg[0] == false) return 1;
256
257 uint32_t id = bytes_to_num(resp.d.asBytes,4);
258
259 if (htf == RHT2F_UID_ONLY){
260 PrintAndLog("Valid Hitag2 tag found - UID: %08x",id);
261 } else {
262 char filename[FILE_PATH_SIZE];
263 FILE* f = NULL;
264 sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
265 f = fopen(filename,"wb");
266 if (!f) {
267 PrintAndLog("Error: Could not open file [%s]",filename);
268 return 1;
269 }
270
271 // Write the 48 tag memory bytes to file and finalize
272 fwrite(resp.d.asBytes, 1, 48, f);
273 fclose(f);
274 PrintAndLog("Succesfully saved tag memory to [%s]",filename);
275 }
276 return 0;
277 }
278
279 int CmdLFHitagSimS(const char *Cmd) {
280 UsbCommand c = { CMD_SIMULATE_HITAG_S };
281 char filename[FILE_PATH_SIZE] = { 0x00 };
282 FILE* f;
283 bool tag_mem_supplied;
284 int len = strlen(Cmd);
285 if (len > FILE_PATH_SIZE)
286 len = FILE_PATH_SIZE;
287 memcpy(filename, Cmd, len);
288
289 if (strlen(filename) > 0) {
290 f = fopen(filename, "rb+");
291 if (!f) {
292 PrintAndLog("Error: Could not open file [%s]", filename);
293 return 1;
294 }
295 tag_mem_supplied = true;
296 size_t bytes_read = fread(c.d.asBytes, 4*64, 1, f);
297 if ( bytes_read == 0) {
298 PrintAndLog("Error: File reading error");
299 fclose(f);
300 return 1;
301 }
302 fclose(f);
303 } else {
304 tag_mem_supplied = false;
305 }
306
307 // Does the tag comes with memory
308 c.arg[0] = (uint32_t) tag_mem_supplied;
309 clearCommandBuffer();
310 SendCommand(&c);
311 return 0;
312 }
313
314 int CmdLFHitagCheckChallenges(const char *Cmd) {
315 UsbCommand c = { CMD_TEST_HITAGS_TRACES };
316 char filename[FILE_PATH_SIZE] = { 0x00 };
317 FILE* f;
318 bool file_given;
319 int len = strlen(Cmd);
320 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
321 memcpy(filename, Cmd, len);
322
323 if (strlen(filename) > 0) {
324 f = fopen(filename,"rb+");
325 if( !f ) {
326 PrintAndLog("Error: Could not open file [%s]", filename);
327 return 1;
328 }
329 file_given = true;
330 size_t bytes_read = fread(c.d.asBytes, 8*60, 1, f);
331 if ( bytes_read == 0) {
332 PrintAndLog("Error: File reading error");
333 fclose(f);
334 return 1;
335 }
336 fclose(f);
337 } else {
338 file_given = false;
339 }
340
341 //file with all the challenges to try
342 c.arg[0] = (uint32_t)file_given;
343 clearCommandBuffer();
344 SendCommand(&c);
345 return 0;
346 }
347
348 int CmdLFHitagWP(const char *Cmd) {
349 UsbCommand c = { CMD_WR_HITAG_S };
350 hitag_data* htd = (hitag_data*)c.d.asBytes;
351 hitag_function htf = param_get32ex(Cmd,0,0,10);
352 switch (htf) {
353 case 03: { //WHTSF_CHALLENGE
354 num_to_bytes(param_get64ex(Cmd,1,0,16),8,htd->auth.NrAr);
355 c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
356 num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->auth.data);
357 } break;
358 case 04: { //WHTSF_KEY
359 num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
360 c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
361 num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->crypto.data);
362
363 } break;
364 default: {
365 PrintAndLog("Error: unkown writer function %d",htf);
366 PrintAndLog("Hitag writer functions");
367 PrintAndLog(" HitagS (0*)");
368 PrintAndLog(" 03 <nr,ar> (Challenge) <page> <byte0...byte3> write page on a Hitag S tag");
369 PrintAndLog(" 04 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
370 PrintAndLog(" Hitag1 (1*)");
371 PrintAndLog(" Hitag2 (2*)");
372 return 1;
373 } break;
374 }
375 // Copy the hitag function into the first argument
376 c.arg[0] = htf;
377
378 clearCommandBuffer();
379 SendCommand(&c);
380 UsbCommand resp;
381 WaitForResponse(CMD_ACK,&resp);
382
383 // Check the return status, stored in the first argument
384 if (resp.arg[0] == false) return 1;
385 return 0;
386 }
387
388 static command_t CommandTable[] =
389 {
390 {"help", CmdHelp, 1, "This help"},
391 {"list", CmdLFHitagList, 1, "<outfile> List Hitag trace history"},
392 {"reader", CmdLFHitagReader, 1, "Act like a Hitag Reader"},
393 {"sim", CmdLFHitagSim, 1, "<infile> Simulate Hitag transponder"},
394 {"snoop", CmdLFHitagSnoop, 1, "Eavesdrop Hitag communication"},
395 {"writer", CmdLFHitagWP, 1, "Act like a Hitag Writer" },
396 {"simS", CmdLFHitagSimS, 1, "<hitagS.hts> Simulate HitagS transponder" },
397 {"checkChallenges", CmdLFHitagCheckChallenges, 1, "<challenges.cc> test all challenges" }, {
398 NULL,NULL, 0, NULL }
399 };
400
401 int CmdLFHitag(const char *Cmd) {
402 clearCommandBuffer();
403 CmdsParse(CommandTable, Cmd);
404 return 0;
405 }
406
407 int CmdHelp(const char *Cmd) {
408 CmdsHelp(CommandTable);
409 return 0;
410 }
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