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1 //-----------------------------------------------------------------------------
2 // Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure
3 //
4 // cmdlfhid.c is Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
5 //
6 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
7 // at your option, any later version. See the LICENSE.txt file for the text of
8 // the license.
9 //-----------------------------------------------------------------------------
10 // Low frequency AWID26 commands
11 //-----------------------------------------------------------------------------
12
13 #include <string.h>
14 #include <stdio.h> // sscanf
15 #include "proxmark3.h" // Definitions, USB controls, etc
16 #include "ui.h" // PrintAndLog
17 #include "cmdparser.h" // CmdsParse, CmdsHelp
18 #include "cmdlfawid.h" // AWID function declarations
19 #include "lfdemod.h" // parityTest +
20 #include "util.h" // weigandparity
21 #include "protocols.h" // for T55xx config register definitions
22 #include "cmddata.h" // for printDemod and demodbuffer commands
23 #include "graph.h" // for getFromGraphBuff cmds
24 #include "cmdmain.h"
25
26 static int CmdHelp(const char *Cmd);
27
28 int usage_lf_awid_read(void) {
29 PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");
30 PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");
31 PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");
32 PrintAndLog("");
33 PrintAndLog("Usage: lf awid read ['1']");
34 PrintAndLog("Options : ");
35 PrintAndLog(" 1 : (optional) stop after reading a single card");
36 PrintAndLog("");
37 PrintAndLog("Samples : lf awid read");
38 PrintAndLog(" : lf awid read 1");
39 return 0;
40 }
41
42 int usage_lf_awid_sim(void) {
43 PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");
44 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
45 PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
46 PrintAndLog("");
47 PrintAndLog("Usage: lf awid sim <Facility-Code> <Card-Number>");
48 PrintAndLog("Options : ");
49 PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");
50 PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");
51 PrintAndLog("");
52 PrintAndLog("Sample : lf awid sim 224 1337");
53 return 0;
54 }
55
56 int usage_lf_awid_clone(void) {
57 PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");
58 PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process.");
59 PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
60 PrintAndLog("");
61 PrintAndLog("Usage: lf awid clone <Facility-Code> <Card-Number>");
62 PrintAndLog("Options : ");
63 PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");
64 PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");
65 PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
66 PrintAndLog("");
67 PrintAndLog("Sample : lf awid clone 224 1337");
68 return 0;
69 }
70
71 int CmdAWIDReadFSK(const char *Cmd) {
72 int findone=0;
73 if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_read();
74 if (Cmd[0] == '1') findone = 1;
75
76 UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};
77 clearCommandBuffer();
78 SendCommand(&c);
79 return 0;
80 }
81 //by marshmellow
82 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
83 //print full AWID Prox ID and some bit format details if found
84 int CmdFSKdemodAWID(const char *Cmd)
85 {
86 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
87 size_t size = getFromGraphBuf(BitStream);
88 if (size==0) return 0;
89
90 //get binary from fsk wave
91 int idx = AWIDdemodFSK(BitStream, &size);
92 if (idx<=0){
93 if (g_debugMode){
94 if (idx == -1)
95 PrintAndLog("DEBUG: Error - not enough samples");
96 else if (idx == -2)
97 PrintAndLog("DEBUG: Error - only noise found");
98 else if (idx == -3)
99 PrintAndLog("DEBUG: Error - problem during FSK demod");
100 else if (idx == -4)
101 PrintAndLog("DEBUG: Error - AWID preamble not found");
102 else if (idx == -5)
103 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
104 else
105 PrintAndLog("DEBUG: Error %d",idx);
106 }
107 return 0;
108 }
109
110 // Index map
111 // 0 10 20 30 40 50 60
112 // | | | | | | |
113 // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
114 // -----------------------------------------------------------------------------
115 // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
116 // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
117 // |---26 bit---| |-----117----||-------------142-------------|
118 // b = format bit len, o = odd parity of last 3 bits
119 // f = facility code, c = card number
120 // w = wiegand parity
121 // (26 bit format shown)
122
123 //get raw ID before removing parities
124 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
125 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
126 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
127 setDemodBuf(BitStream,96,idx);
128
129 size = removeParity(BitStream, idx+8, 4, 1, 88);
130 if (size != 66){
131 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
132 return 0;
133 }
134 // ok valid card found!
135
136 // Index map
137 // 0 10 20 30 40 50 60
138 // | | | | | | |
139 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
140 // -----------------------------------------------------------------------------
141 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
142 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
143 // |26 bit| |-117--| |-----142------|
144 // b = format bit len, o = odd parity of last 3 bits
145 // f = facility code, c = card number
146 // w = wiegand parity
147 // (26 bit format shown)
148
149 uint32_t fc = 0;
150 uint32_t cardnum = 0;
151 uint32_t code1 = 0;
152 uint32_t code2 = 0;
153 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
154 if (fmtLen==26){
155 fc = bytebits_to_byte(BitStream+9, 8);
156 cardnum = bytebits_to_byte(BitStream+17, 16);
157 code1 = bytebits_to_byte(BitStream+8,fmtLen);
158 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
159 } else {
160 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
161 if (fmtLen>32){
162 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
163 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
164 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
165 } else{
166 code1 = bytebits_to_byte(BitStream+8,fmtLen);
167 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
168 }
169 }
170 if (g_debugMode){
171 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
172 printDemodBuff();
173 }
174 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
175 return 1;
176 }
177
178 //refactored by marshmellow
179 int getAWIDBits(uint32_t fc, uint32_t cn, uint8_t *AWIDBits) {
180 uint8_t pre[66];
181 memset(pre, 0, sizeof(pre));
182 AWIDBits[7]=1;
183 num_to_bytebits(26, 8, pre);
184
185 uint8_t wiegand[24];
186 num_to_bytebits(fc, 8, wiegand);
187 num_to_bytebits(cn, 16, wiegand+8);
188
189 wiegand_add_parity(pre+8, wiegand, 24);
190
191 size_t bitLen = addParity(pre, AWIDBits+8, 66, 4, 1);
192 if (bitLen != 88) return 0;
193 //for (uint8_t i = 0; i<3; i++){
194 // PrintAndLog("DEBUG: %08X", bytebits_to_byte(AWIDBits+(32*i),32));
195 //}
196 return 1;
197 }
198
199 int CmdAWIDSim(const char *Cmd) {
200 uint32_t fcode = 0, cnum = 0, fc=0, cn=0;
201 uint8_t BitStream[96];
202 uint8_t *bs = BitStream;
203 size_t size = sizeof(BitStream);
204 memset(bs, 0, size);
205
206 uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
207 uint64_t arg2 = 50; // clk RF/50 invert=0
208
209 if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_sim();
210
211 fcode = (fc & 0x000000FF);
212 cnum = (cn & 0x0000FFFF);
213
214 if (fc != fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
215 if (cn != cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
216
217 PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
218 PrintAndLog("Press pm3-button to abort simulation or run another command");
219
220 if (!getAWIDBits(fc, cn, bs)) {
221 PrintAndLog("Error with tag bitstream generation.");
222 return 1;
223 }
224 // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
225 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
226 memcpy(c.d.asBytes, bs, size);
227 clearCommandBuffer();
228 SendCommand(&c);
229 return 0;
230 }
231
232 int CmdAWIDClone(const char *Cmd) {
233 uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
234 uint32_t fc=0,cn=0;
235 uint8_t BitStream[96];
236 uint8_t *bs=BitStream;
237 memset(bs,0,sizeof(BitStream));
238
239 if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_clone();
240
241 if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
242 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | ((50-2)>>1)<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
243
244 if ((fc & 0xFF) != fc) {
245 fc &= 0xFF;
246 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
247 }
248 if ((cn & 0xFFFF) != cn) {
249 cn &= 0xFFFF;
250 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
251 }
252
253 if ( !getAWIDBits(fc, cn, bs)) {
254 PrintAndLog("Error with tag bitstream generation.");
255 return 1;
256 }
257
258 blocks[1] = bytebits_to_byte(bs,32);
259 blocks[2] = bytebits_to_byte(bs+32,32);
260 blocks[3] = bytebits_to_byte(bs+64,32);
261
262 PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u",
263 fc, cn);
264 PrintAndLog("Blk | Data ");
265 PrintAndLog("----+------------");
266 PrintAndLog(" 00 | 0x%08x", blocks[0]);
267 PrintAndLog(" 01 | 0x%08x", blocks[1]);
268 PrintAndLog(" 02 | 0x%08x", blocks[2]);
269 PrintAndLog(" 03 | 0x%08x", blocks[3]);
270
271 UsbCommand resp;
272 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
273
274 for (uint8_t i=0; i<4; i++) {
275 c.cmd = CMD_T55XX_WRITE_BLOCK;
276 c.arg[0] = blocks[i];
277 c.arg[1] = i;
278 c.arg[2] = 0;
279 clearCommandBuffer();
280 SendCommand(&c);
281 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
282 PrintAndLog("Error occurred, device did not respond during write operation.");
283 return -1;
284 }
285
286 }
287 return 0;
288 }
289
290 static command_t CommandTable[] = {
291 {"help", CmdHelp, 1, "This help"},
292 {"demod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from the GraphBuffer"},
293 {"read", CmdAWIDReadFSK, 0, "['1'] Realtime AWID FSK read from the antenna (option '1' for one tag only)"},
294 {"sim", CmdAWIDSim, 0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
295 {"clone", CmdAWIDClone, 0, "<Facility-Code> <Card Number> <Q5> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
296 {NULL, NULL, 0, NULL}
297 };
298
299 int CmdLFAWID(const char *Cmd) {
300 CmdsParse(CommandTable, Cmd);
301 return 0;
302 }
303
304 int CmdHelp(const char *Cmd) {
305 CmdsHelp(CommandTable);
306 return 0;
307 }
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