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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 <stdio.h> // sscanf | |
14 | #include "proxmark3.h" // Definitions, USB controls, etc | |
15 | #include "ui.h" // PrintAndLog | |
16 | #include "cmdparser.h" // CmdsParse, CmdsHelp | |
17 | #include "cmdlfawid.h" // AWID function declarations | |
18 | #include "lfdemod.h" // parityTest | |
19 | #include "cmdmain.h" | |
20 | static int CmdHelp(const char *Cmd); | |
21 | ||
22 | int usage_lf_awid_fskdemod(void) { | |
23 | PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags."); | |
24 | PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued."); | |
25 | PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card."); | |
26 | PrintAndLog(""); | |
27 | PrintAndLog("Usage: lf awid fskdemod ['1']"); | |
28 | PrintAndLog("Options :"); | |
29 | PrintAndLog(" 1 : (optional) stop after reading a single card"); | |
30 | PrintAndLog(""); | |
31 | PrintAndLog(" sample : lf awid fskdemod"); | |
32 | PrintAndLog(" : lf awid fskdemod 1"); | |
33 | return 0; | |
34 | } | |
35 | ||
36 | int usage_lf_awid_sim(void) { | |
37 | PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number."); | |
38 | PrintAndLog("Simulation runs until the button is pressed or another USB command is issued."); | |
39 | PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated."); | |
40 | PrintAndLog(""); | |
41 | PrintAndLog("Usage: lf awid sim <Facility-Code> <Card-Number>"); | |
42 | PrintAndLog("Options :"); | |
43 | PrintAndLog(" <Facility-Code> : 8-bit value AWID facility code"); | |
44 | PrintAndLog(" <Card Number> : 16-bit value AWID card number"); | |
45 | PrintAndLog(""); | |
46 | PrintAndLog("sample : lf awid sim 224 1337"); | |
47 | return 0; | |
48 | } | |
49 | ||
50 | int usage_lf_awid_clone(void) { | |
51 | PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7."); | |
52 | PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process."); | |
53 | PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated."); | |
54 | PrintAndLog(""); | |
55 | PrintAndLog("Usage: lf awid clone <Facility-Code> <Card-Number>"); | |
56 | PrintAndLog("Options :"); | |
57 | PrintAndLog(" <Facility-Code> : 8-bit value AWID facility code"); | |
58 | PrintAndLog(" <Card Number> : 16-bit value AWID card number"); | |
59 | PrintAndLog(""); | |
60 | PrintAndLog("sample : lf awid clone 224 1337"); | |
61 | return 0; | |
62 | } | |
63 | ||
64 | int CmdAWIDDemodFSK(const char *Cmd) { | |
65 | int findone = 0; | |
66 | if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod(); | |
67 | ||
68 | if (Cmd[0] == '1') findone = 1; | |
69 | ||
70 | UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}}; | |
71 | clearCommandBuffer(); | |
72 | SendCommand(&c); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | int getAWIDBits(unsigned int fc, unsigned int cn, uint8_t *AWIDBits) | |
77 | { | |
78 | //int i; | |
79 | uint32_t fcode = (fc & 0x000000FF); | |
80 | uint32_t cnum = (cn & 0x0000FFFF); | |
81 | uint32_t uBits = 0; | |
82 | ||
83 | if (fcode != fc) | |
84 | PrintAndLog("NOTE: Facility code truncated for AWID26 format (8-bit facility code)"); | |
85 | if (cnum!=cn) | |
86 | PrintAndLog("NOTE: Card number was truncated for AWID26 format (16-bit card number)"); | |
87 | ||
88 | uint8_t pre[] = {0x01, 0x1D, 0x80, 0x00,0x00,0x00,0x00, 0x11, 0x11, 0x11, 0x11, 0x11}; | |
89 | memcpy(AWIDBits, pre , sizeof(pre)); | |
90 | ||
91 | // AWIDBits[0] = 0x01; // 6-bit Preamble with 2 parity bits | |
92 | // AWIDBits[1] = 0x1D; // First byte from card format (26-bit) plus parity bits | |
93 | // AWIDBits[2] = 0x80; // Set the next two bits as 0b10 to finish card format | |
94 | ||
95 | // for (i = 7; i<12; i++) | |
96 | // AWIDBits[i]=0x11; | |
97 | ||
98 | uBits = (fcode<<4) + (cnum>>12); | |
99 | ||
100 | if (!parityTest(uBits,12,0)) AWIDBits[2] |= (1<<5); // If not already even parity, set bit to make even | |
101 | ||
102 | uBits = AWIDBits[2]>>5; | |
103 | ||
104 | if (!parityTest(uBits, 3, 1)) AWIDBits[2] |= (1<<4); | |
105 | ||
106 | uBits = fcode>>5; // first 3 bits of facility-code | |
107 | AWIDBits[2] += (uBits<<1); | |
108 | ||
109 | if (!parityTest(uBits, 3, 1)) AWIDBits[2]++; // Set parity bit to make odd parity | |
110 | ||
111 | uBits = (fcode & 0x1C)>>2; | |
112 | AWIDBits[3] = 0; | |
113 | ||
114 | if (!parityTest(uBits,3,1)) AWIDBits[3] |= (1<<4); | |
115 | ||
116 | AWIDBits[3] += (uBits<<5); | |
117 | uBits = ((fcode & 0x3)<<1) + ((cnum & 0x8000)>>15); // Grab/shift 2 LSBs from facility code and add shifted MSB from cardnum | |
118 | ||
119 | if (!parityTest(uBits,3,1)) AWIDBits[3]++; // Set LSB for parity | |
120 | ||
121 | AWIDBits[3]+= (uBits<<1); | |
122 | uBits = (cnum & 0x7000)>>12; | |
123 | AWIDBits[4] = uBits<<5; | |
124 | ||
125 | if (!parityTest(uBits,3,1)) AWIDBits[4] |= (1<<4); | |
126 | ||
127 | uBits = (cnum & 0x0E00)>>9; | |
128 | AWIDBits[4] += (uBits<<1); | |
129 | ||
130 | if (!parityTest(uBits,3,1)) AWIDBits[4]++; // Set LSB for parity | |
131 | ||
132 | uBits = (cnum & 0x1C0)>>6; // Next bits from card number | |
133 | AWIDBits[5]=(uBits<<5); | |
134 | ||
135 | if (!parityTest(uBits,3,1)) AWIDBits[5] |= (1<<4); // Set odd parity bit as needed | |
136 | ||
137 | uBits = (cnum & 0x38)>>3; | |
138 | AWIDBits[5]+= (uBits<<1); | |
139 | ||
140 | if (!parityTest(uBits,3,1)) AWIDBits[5]++; // Set odd parity bit as needed | |
141 | ||
142 | uBits = (cnum & 0x7); // Last three bits from card number! | |
143 | AWIDBits[6] = (uBits<<5); | |
144 | ||
145 | if (!parityTest(uBits,3,1)) AWIDBits[6] |= (1<<4); | |
146 | ||
147 | uBits = (cnum & 0x0FFF); | |
148 | ||
149 | if (!parityTest(uBits,12,1)) | |
150 | AWIDBits[6] |= (1<<3); | |
151 | else | |
152 | AWIDBits[6]++; | |
153 | ||
154 | return 1; | |
155 | } | |
156 | ||
157 | int CmdAWIDSim(const char *Cmd) | |
158 | { | |
159 | uint32_t fcode = 0, cnum = 0, fc=0, cn=0, i=0; | |
160 | uint8_t bits[12]; | |
161 | uint8_t *bs=bits; | |
162 | ||
163 | uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8 | |
164 | uint64_t arg2 = 50; // clk RF/50 invert=0 | |
165 | ||
166 | if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_sim(); | |
167 | ||
168 | fcode = (fc & 0x000000FF); | |
169 | cnum = (cn & 0x0000FFFF); | |
170 | ||
171 | if (fc!=fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u", fc, fcode); | |
172 | if (cn!=cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u", cn, cnum); | |
173 | ||
174 | PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n", fcode, cnum); | |
175 | PrintAndLog("Press pm3-button to abort simulation or run another command"); | |
176 | ||
177 | if (!getAWIDBits(fc, cn, bs)) { | |
178 | PrintAndLog("Error with tag bitstream generation."); | |
179 | return 1; | |
180 | } | |
181 | // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0 | |
182 | PrintAndLog("Running 'lf simfsk c 50 H 10 L 8 d %s'", sprint_hex(bs, sizeof(bs))); | |
183 | ||
184 | // arg1 --- fcHigh<<8 + fcLow | |
185 | // arg2 --- Inversion and clk setting | |
186 | // 96 --- Bitstream length: 96-bits == 12 bytes | |
187 | UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, 96}}; | |
188 | ||
189 | for (i=0; i < 96; i++) | |
190 | c.d.asBytes[i] = (bs[i/8] & (1<<(7-(i%8)))) ? 1 : 0; | |
191 | ||
192 | clearCommandBuffer(); | |
193 | SendCommand(&c); | |
194 | return 0; | |
195 | } | |
196 | ||
197 | int CmdAWIDClone(const char *Cmd) | |
198 | { | |
199 | uint32_t blocks[4] = {0x00107060, 0, 0, 0x11111111}; | |
200 | uint32_t fc=0, cn=0, i=0; | |
201 | uint8_t bits[12]; | |
202 | uint8_t *bs=bits; | |
203 | ||
204 | if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_clone(); | |
205 | ||
206 | if ((fc & 0xFF) != fc) { | |
207 | fc &= 0xFF; | |
208 | PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc); | |
209 | } | |
210 | ||
211 | if ((cn & 0xFFFF) != cn) { | |
212 | cn &= 0xFFFF; | |
213 | PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn); | |
214 | } | |
215 | ||
216 | if ( !getAWIDBits(fc, cn, bs)) { | |
217 | PrintAndLog("Error with tag bitstream generation."); | |
218 | return 1; | |
219 | } | |
220 | ||
221 | PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u ", fc, cn); | |
222 | PrintAndLog("Raw: %s", sprint_hex(bs, sizeof(bs))); | |
223 | ||
224 | blocks[1] = (bs[0]<<24) + (bs[1]<<16) + (bs[2]<<8) + (bs[3]); | |
225 | blocks[2] = (bs[4]<<24) + (bs[5]<<16) + (bs[6]<<8) + (bs[7]); | |
226 | ||
227 | PrintAndLog("Blk | Data "); | |
228 | PrintAndLog("----+------------"); | |
229 | PrintAndLog(" 00 | 0x%08x", blocks[0]); | |
230 | PrintAndLog(" 01 | 0x%08x", blocks[1]); | |
231 | PrintAndLog(" 02 | 0x%08x", blocks[2]); | |
232 | PrintAndLog(" 03 | 0x%08x", blocks[3]); | |
233 | ||
234 | UsbCommand resp; | |
235 | UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}}; | |
236 | ||
237 | for (i=0; i<4; i++) { | |
238 | c.arg[0] = blocks[i]; | |
239 | c.arg[1] = i; | |
240 | clearCommandBuffer(); | |
241 | SendCommand(&c); | |
242 | if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){ | |
243 | PrintAndLog("Error occurred, device did not respond during write operation."); | |
244 | return -1; | |
245 | } | |
246 | } | |
247 | return 0; | |
248 | } | |
249 | ||
250 | static command_t CommandTable[] = | |
251 | { | |
252 | {"help", CmdHelp, 1, "This help"}, | |
253 | {"fskdemod", CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"}, | |
254 | {"sim", CmdAWIDSim, 0, "<Facility-Code> <Card Number> -- AWID tag simulator"}, | |
255 | {"clone", CmdAWIDClone, 0, "<Facility-Code> <Card Number> -- Clone AWID to T55x7 (tag must be in range of antenna)"}, | |
256 | {NULL, NULL, 0, NULL} | |
257 | }; | |
258 | ||
259 | int CmdLFAWID(const char *Cmd) | |
260 | { | |
261 | CmdsParse(CommandTable, Cmd); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | int CmdHelp(const char *Cmd) | |
266 | { | |
267 | CmdsHelp(CommandTable); | |
268 | return 0; | |
269 | } |