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