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[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"
28fdb04f 15//#include "proxusb.h"
902cb3c0 16#include "proxmark3.h"
db09cb3a 17#include "ui.h"
18#include "cmdparser.h"
19#include "common.h"
20#include "util.h"
21#include "hitag2.h"
902cb3c0 22#include "sleep.h"
23#include "cmdmain.h"
db09cb3a 24
25static int CmdHelp(const char *Cmd);
26
47e18126 27size_t nbytes(size_t nbits) {
28 return (nbits/8)+((nbits%8)>0);
29}
30
db09cb3a 31int CmdLFHitagList(const char *Cmd)
32{
33 uint8_t got[3000];
34 GetFromBigBuf(got,sizeof(got),0);
902cb3c0 35 WaitForResponse(CMD_ACK,NULL);
36
db09cb3a 37 PrintAndLog("recorded activity:");
47e18126 38 PrintAndLog(" ETU :nbits: who bytes");
39 PrintAndLog("---------+-----+----+-----------");
db09cb3a 40
41 int i = 0;
42 int prev = -1;
43
ab4da50d 44 char filename[256];
45 FILE* pf = NULL;
46
db09cb3a 47 for (;;) {
48 if(i >= 1900) {
49 break;
50 }
51
52 bool isResponse;
53 int timestamp = *((uint32_t *)(got+i));
54 if (timestamp & 0x80000000) {
55 timestamp &= 0x7fffffff;
56 isResponse = 1;
57 } else {
58 isResponse = 0;
59 }
60
db09cb3a 61 int parityBits = *((uint32_t *)(got+i+4));
62 // 4 bytes of additional information...
63 // maximum of 32 additional parity bit information
64 //
65 // TODO:
66 // at each quarter bit period we can send power level (16 levels)
67 // or each half bit period in 256 levels.
68
47e18126 69 int bits = got[i+8];
70 int len = nbytes(got[i+8]);
db09cb3a 71
72 if (len > 100) {
73 break;
74 }
75 if (i + len >= 1900) {
76 break;
77 }
78
79 uint8_t *frame = (got+i+9);
80
81 // Break and stick with current result if buffer was not completely full
82 if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
83
84 char line[1000] = "";
85 int j;
86 for (j = 0; j < len; j++) {
87 int oddparity = 0x01;
88 int k;
89
90 for (k=0;k<8;k++) {
91 oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
92 }
93
94 //if((parityBits >> (len - j - 1)) & 0x01) {
95 if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
96 sprintf(line+(j*4), "%02x! ", frame[j]);
97 }
98 else {
99 sprintf(line+(j*4), "%02x ", frame[j]);
100 }
101 }
102
47e18126 103 PrintAndLog(" +%7d: %3d: %s %s",
db09cb3a 104 (prev < 0 ? 0 : (timestamp - prev)),
47e18126 105 bits,
db09cb3a 106 (isResponse ? "TAG" : " "),
107 line);
108
2d495a81 109
902cb3c0 110 if (pf) {
47e18126 111 fprintf(pf," +%7d: %3d: %s %s\n",
2d495a81 112 (prev < 0 ? 0 : (timestamp - prev)),
47e18126 113 bits,
2d495a81 114 (isResponse ? "TAG" : " "),
47e18126 115 line);
2d495a81 116 }
117
db09cb3a 118 prev = timestamp;
119 i += (len + 9);
120 }
2d495a81 121
902cb3c0 122 if (pf) {
2d495a81 123 PrintAndLog("Recorded activity succesfully written to file: %s", filename);
124 fclose(pf);
125 }
126
127 return 0;
db09cb3a 128}
129
130int CmdLFHitagSnoop(const char *Cmd) {
131 UsbCommand c = {CMD_SNOOP_HITAG};
132 SendCommand(&c);
133 return 0;
134}
135
136int CmdLFHitagSim(const char *Cmd) {
137 UsbCommand c = {CMD_SIMULATE_HITAG};
bde10a50 138 char filename[256] = { 0x00 };
db09cb3a 139 FILE* pf;
140 bool tag_mem_supplied;
141
142 param_getstr(Cmd,0,filename);
143
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) {
151 PrintAndLog("Error: File reading error");
152 return 1;
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
234static command_t CommandTableHitag[] =
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{
246 CmdsParse(CommandTableHitag, Cmd);
247 return 0;
248}
249
250int CmdHelp(const char *Cmd)
251{
252 CmdsHelp(CommandTableHitag);
253 return 0;
254}
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