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BUG: don't try to fix things that ain't broken.. or not. My try for a fix ended...
[proxmark3-svn] / client / cmdlfhitag.c
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db09cb3a 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"
902cb3c0 15#include "proxmark3.h"
db09cb3a 16#include "ui.h"
17#include "cmdparser.h"
f38a1528 18#include "../include/common.h"
db09cb3a 19#include "util.h"
f38a1528 20#include "../include/hitag2.h"
902cb3c0 21#include "sleep.h"
22#include "cmdmain.h"
db09cb3a 23
24static int CmdHelp(const char *Cmd);
25
47e18126 26size_t nbytes(size_t nbits) {
27 return (nbits/8)+((nbits%8)>0);
28}
29
db09cb3a 30int CmdLFHitagList(const char *Cmd)
31{
95e63594 32 uint8_t got[TRACE_BUFFER_SIZE];
db09cb3a 33 GetFromBigBuf(got,sizeof(got),0);
902cb3c0 34 WaitForResponse(CMD_ACK,NULL);
35
db09cb3a 36 PrintAndLog("recorded activity:");
47e18126 37 PrintAndLog(" ETU :nbits: who bytes");
38 PrintAndLog("---------+-----+----+-----------");
db09cb3a 39
40 int i = 0;
41 int prev = -1;
42
ab4da50d 43 char filename[256];
44 FILE* pf = NULL;
45
db09cb3a 46 for (;;) {
95e63594 47
48 if(i >= TRACE_BUFFER_SIZE) { break; }
db09cb3a 49
50 bool isResponse;
51 int timestamp = *((uint32_t *)(got+i));
52 if (timestamp & 0x80000000) {
53 timestamp &= 0x7fffffff;
54 isResponse = 1;
55 } else {
56 isResponse = 0;
57 }
58
db09cb3a 59 int parityBits = *((uint32_t *)(got+i+4));
60 // 4 bytes of additional information...
61 // maximum of 32 additional parity bit information
62 //
63 // TODO:
64 // at each quarter bit period we can send power level (16 levels)
65 // or each half bit period in 256 levels.
66
47e18126 67 int bits = got[i+8];
68 int len = nbytes(got[i+8]);
db09cb3a 69
70 if (len > 100) {
71 break;
72 }
95e63594 73 if (i + len >= TRACE_BUFFER_SIZE) { break;}
db09cb3a 74
75 uint8_t *frame = (got+i+9);
76
77 // Break and stick with current result if buffer was not completely full
78 if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
79
80 char line[1000] = "";
81 int j;
82 for (j = 0; j < len; j++) {
83 int oddparity = 0x01;
84 int k;
85
86 for (k=0;k<8;k++) {
87 oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
88 }
89
90 //if((parityBits >> (len - j - 1)) & 0x01) {
91 if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
92 sprintf(line+(j*4), "%02x! ", frame[j]);
93 }
94 else {
95 sprintf(line+(j*4), "%02x ", frame[j]);
96 }
97 }
98
47e18126 99 PrintAndLog(" +%7d: %3d: %s %s",
db09cb3a 100 (prev < 0 ? 0 : (timestamp - prev)),
47e18126 101 bits,
db09cb3a 102 (isResponse ? "TAG" : " "),
103 line);
104
2d495a81 105
902cb3c0 106 if (pf) {
47e18126 107 fprintf(pf," +%7d: %3d: %s %s\n",
2d495a81 108 (prev < 0 ? 0 : (timestamp - prev)),
47e18126 109 bits,
2d495a81 110 (isResponse ? "TAG" : " "),
47e18126 111 line);
2d495a81 112 }
113
db09cb3a 114 prev = timestamp;
115 i += (len + 9);
116 }
2d495a81 117
902cb3c0 118 if (pf) {
2d495a81 119 PrintAndLog("Recorded activity succesfully written to file: %s", filename);
120 fclose(pf);
121 }
122
123 return 0;
db09cb3a 124}
125
126int CmdLFHitagSnoop(const char *Cmd) {
127 UsbCommand c = {CMD_SNOOP_HITAG};
128 SendCommand(&c);
129 return 0;
130}
131
132int CmdLFHitagSim(const char *Cmd) {
463ca973 133
134 UsbCommand c = {CMD_SIMULATE_HITAG};
135 char filename[FILE_PATH_SIZE] = { 0x00 };
db09cb3a 136 FILE* pf;
137 bool tag_mem_supplied;
463ca973 138 int len = 0;
db09cb3a 139
463ca973 140 len = strlen(Cmd);
141 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
142 memcpy(filename, Cmd, len);
143
db09cb3a 144 if (strlen(filename) > 0) {
145 if ((pf = fopen(filename,"rb+")) == NULL) {
146 PrintAndLog("Error: Could not open file [%s]",filename);
147 return 1;
148 }
149 tag_mem_supplied = true;
759c16b3 150 if (fread(c.d.asBytes,48,1,pf) == 0) {
463ca973 151 PrintAndLog("Error: File reading error");
759c16b3 152 return 1;
463ca973 153 }
db09cb3a 154 fclose(pf);
155 } else {
156 tag_mem_supplied = false;
157 }
158
159 // Does the tag comes with memory
160 c.arg[0] = (uint32_t)tag_mem_supplied;
161
162 SendCommand(&c);
163 return 0;
164}
165
166int CmdLFHitagReader(const char *Cmd) {
167// UsbCommand c = {CMD_READER_HITAG};
168
169// param_get32ex(Cmd,1,0,16);
170 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)}};
171 hitag_data* htd = (hitag_data*)c.d.asBytes;
172 hitag_function htf = param_get32ex(Cmd,0,0,10);
173
174 switch (htf) {
175 case RHT2F_PASSWORD: {
176 num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
177 } break;
178 case RHT2F_AUTHENTICATE: {
179 num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
180 num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
181 } break;
bde10a50 182 case RHT2F_CRYPTO: {
183 num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
184// num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
185 } break;
db09cb3a 186 case RHT2F_TEST_AUTH_ATTEMPTS: {
187 // No additional parameters needed
188 } break;
189 default: {
190 PrintAndLog("Error: unkown reader function %d",htf);
ab4da50d 191 PrintAndLog("Hitag reader functions");
192 PrintAndLog(" HitagS (0*)");
193 PrintAndLog(" Hitag1 (1*)");
194 PrintAndLog(" Hitag2 (2*)");
195 PrintAndLog(" 21 <password> (password mode)");
196 PrintAndLog(" 22 <nr> <ar> (authentication)");
197 PrintAndLog(" 23 <key> (authentication) key is in format: ISK high + ISK low");
198 PrintAndLog(" 25 (test recorded authentications)");
db09cb3a 199 return 1;
200 } break;
201 }
202
203 // Copy the hitag2 function into the first argument
204 c.arg[0] = htf;
205
ab4da50d 206 // Send the command to the proxmark
db09cb3a 207 SendCommand(&c);
ab4da50d 208
209 UsbCommand resp;
210 WaitForResponse(CMD_ACK,&resp);
211
212 // Check the return status, stored in the first argument
213 if (resp.arg[0] == false) return 1;
214
215 uint32_t id = bytes_to_num(resp.d.asBytes,4);
216 char filename[256];
217 FILE* pf = NULL;
218
219 sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
220 if ((pf = fopen(filename,"wb")) == NULL) {
221 PrintAndLog("Error: Could not open file [%s]",filename);
222 return 1;
223 }
224
225 // Write the 48 tag memory bytes to file and finalize
226 fwrite(resp.d.asBytes,1,48,pf);
227 fclose(pf);
228
229 PrintAndLog("Succesfully saved tag memory to [%s]",filename);
230
db09cb3a 231 return 0;
232}
233
081151ea 234static command_t CommandTable[] =
db09cb3a 235{
236 {"help", CmdHelp, 1, "This help"},
237 {"list", CmdLFHitagList, 1, "List Hitag trace history"},
238 {"reader", CmdLFHitagReader, 1, "Act like a Hitag Reader"},
239 {"sim", CmdLFHitagSim, 1, "Simulate Hitag transponder"},
240 {"snoop", CmdLFHitagSnoop, 1, "Eavesdrop Hitag communication"},
241 {NULL, NULL, 0, NULL}
242};
243
244int CmdLFHitag(const char *Cmd)
245{
081151ea 246 CmdsParse(CommandTable, Cmd);
db09cb3a 247 return 0;
248}
249
250int CmdHelp(const char *Cmd)
251{
081151ea 252 CmdsHelp(CommandTable);
db09cb3a 253 return 0;
254}
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