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FIX: Some Coverity Scan warnings. fread, not initialised etc etc
[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 default: {
226 PrintAndLog("Error: unkown reader function %d",htf);
227 PrintAndLog("Hitag reader functions");
228 PrintAndLog(" HitagS (0*)");
229 PrintAndLog(" 01 <nr> <ar> (Challenge) read all pages from a Hitag S tag");
230 PrintAndLog(" 02 <key> (set to 0 if no authentication is needed) read all pages from a Hitag S tag");
231 PrintAndLog(" Hitag1 (1*)");
232 PrintAndLog(" Hitag2 (2*)");
233 PrintAndLog(" 21 <password> (password mode)");
234 PrintAndLog(" 22 <nr> <ar> (authentication)");
235 PrintAndLog(" 23 <key> (authentication) key is in format: ISK high + ISK low");
236 PrintAndLog(" 25 (test recorded authentications)");
237 return 1;
238 } break;
239 }
240
241 // Copy the hitag2 function into the first argument
242 c.arg[0] = htf;
243 clearCommandBuffer();
244 SendCommand(&c);
245 UsbCommand resp;
246 WaitForResponse(CMD_ACK,&resp);
247
248 // Check the return status, stored in the first argument
249 if (resp.arg[0] == false) return 1;
250
251 uint32_t id = bytes_to_num(resp.d.asBytes,4);
252
253 char filename[FILE_PATH_SIZE];
254 FILE* f = NULL;
255 sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
256 f = fopen(filename,"wb");
257 if (!f) {
258 PrintAndLog("Error: Could not open file [%s]",filename);
259 return 1;
260 }
261
262 // Write the 48 tag memory bytes to file and finalize
263 fwrite(resp.d.asBytes, 1, 48, f);
264 fclose(f);
265 PrintAndLog("Succesfully saved tag memory to [%s]",filename);
266 return 0;
267 }
268
269 int CmdLFHitagSimS(const char *Cmd) {
270 UsbCommand c = { CMD_SIMULATE_HITAG_S };
271 char filename[FILE_PATH_SIZE] = { 0x00 };
272 FILE* f;
273 bool tag_mem_supplied;
274 int len = strlen(Cmd);
275 if (len > FILE_PATH_SIZE)
276 len = FILE_PATH_SIZE;
277 memcpy(filename, Cmd, len);
278
279 if (strlen(filename) > 0) {
280 f = fopen(filename, "rb+");
281 if (!f) {
282 PrintAndLog("Error: Could not open file [%s]", filename);
283 return 1;
284 }
285 tag_mem_supplied = true;
286 size_t bytes_read = fread(c.d.asBytes, 4*64, 1, f);
287 if ( bytes_read == 0) {
288 PrintAndLog("Error: File reading error");
289 fclose(f);
290 return 1;
291 }
292 fclose(f);
293 } else {
294 tag_mem_supplied = false;
295 }
296
297 // Does the tag comes with memory
298 c.arg[0] = (uint32_t) tag_mem_supplied;
299 clearCommandBuffer();
300 SendCommand(&c);
301 return 0;
302 }
303
304 int CmdLFHitagCheckChallenges(const char *Cmd) {
305 UsbCommand c = { CMD_TEST_HITAGS_TRACES };
306 char filename[FILE_PATH_SIZE] = { 0x00 };
307 FILE* f;
308 bool file_given;
309 int len = strlen(Cmd);
310 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
311 memcpy(filename, Cmd, len);
312
313 if (strlen(filename) > 0) {
314 f = fopen(filename,"rb+");
315 if( !f ) {
316 PrintAndLog("Error: Could not open file [%s]", filename);
317 return 1;
318 }
319 file_given = true;
320 size_t bytes_read = fread(c.d.asBytes, 8*60, 1, f);
321 if ( bytes_read == 0) {
322 PrintAndLog("Error: File reading error");
323 fclose(f);
324 return 1;
325 }
326 fclose(f);
327 } else {
328 file_given = false;
329 }
330
331 //file with all the challenges to try
332 c.arg[0] = (uint32_t)file_given;
333 clearCommandBuffer();
334 SendCommand(&c);
335 return 0;
336 }
337
338 int CmdLFHitagWP(const char *Cmd) {
339 UsbCommand c = { CMD_WR_HITAG_S };
340 hitag_data* htd = (hitag_data*)c.d.asBytes;
341 hitag_function htf = param_get32ex(Cmd,0,0,10);
342 switch (htf) {
343 case 03: { //WHTSF_CHALLENGE
344 num_to_bytes(param_get64ex(Cmd,1,0,16),8,htd->auth.NrAr);
345 c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
346 num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->auth.data);
347 } break;
348 case 04: { //WHTSF_KEY
349 num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
350 c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
351 num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->crypto.data);
352
353 } break;
354 default: {
355 PrintAndLog("Error: unkown writer function %d",htf);
356 PrintAndLog("Hitag writer functions");
357 PrintAndLog(" HitagS (0*)");
358 PrintAndLog(" 03 <nr,ar> (Challenge) <page> <byte0...byte3> write page on a Hitag S tag");
359 PrintAndLog(" 04 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
360 PrintAndLog(" Hitag1 (1*)");
361 PrintAndLog(" Hitag2 (2*)");
362 return 1;
363 } break;
364 }
365 // Copy the hitag function into the first argument
366 c.arg[0] = htf;
367
368 clearCommandBuffer();
369 SendCommand(&c);
370 UsbCommand resp;
371 WaitForResponse(CMD_ACK,&resp);
372
373 // Check the return status, stored in the first argument
374 if (resp.arg[0] == false) return 1;
375 return 0;
376 }
377
378 static command_t CommandTable[] =
379 {
380 {"help", CmdHelp, 1, "This help"},
381 {"list", CmdLFHitagList, 1, "<outfile> List Hitag trace history"},
382 {"reader", CmdLFHitagReader, 1, "Act like a Hitag Reader"},
383 {"sim", CmdLFHitagSim, 1, "<infile> Simulate Hitag transponder"},
384 {"snoop", CmdLFHitagSnoop, 1, "Eavesdrop Hitag communication"},
385 {"writer", CmdLFHitagWP, 1, "Act like a Hitag Writer" },
386 {"simS", CmdLFHitagSimS, 1, "<hitagS.hts> Simulate HitagS transponder" },
387 {"checkChallenges", CmdLFHitagCheckChallenges, 1, "<challenges.cc> test all challenges" }, {
388 NULL,NULL, 0, NULL }
389 };
390
391 int CmdLFHitag(const char *Cmd) {
392 clearCommandBuffer();
393 CmdsParse(CommandTable, Cmd);
394 return 0;
395 }
396
397 int CmdHelp(const char *Cmd) {
398 CmdsHelp(CommandTable);
399 return 0;
400 }
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