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db25599d | 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 | |
7838f4be | 19 | #include "cmdmain.h" |
db25599d | 20 | static int CmdHelp(const char *Cmd); |
21 | ||
22 | ||
23 | int usage_lf_awid_fskdemod(void) { | |
24 | PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags."); | |
25 | PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued."); | |
26 | PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card."); | |
27 | PrintAndLog(""); | |
28 | PrintAndLog("Usage: lf awid fskdemod ['1']"); | |
29 | PrintAndLog(" Options : "); | |
30 | PrintAndLog(" 1 : (optional) stop after reading a single card"); | |
31 | PrintAndLog(""); | |
32 | PrintAndLog(" sample : lf awid fskdemod"); | |
33 | PrintAndLog(" : lf awid fskdemod 1"); | |
34 | return 0; | |
35 | } | |
36 | ||
37 | int usage_lf_awid_sim(void) { | |
38 | PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number."); | |
39 | PrintAndLog("Simulation runs until the button is pressed or another USB command is issued."); | |
40 | PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated."); | |
41 | PrintAndLog(""); | |
42 | PrintAndLog("Usage: lf awid sim <Facility-Code> <Card-Number>"); | |
43 | PrintAndLog(" Options : "); | |
44 | PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code"); | |
45 | PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number"); | |
46 | PrintAndLog(""); | |
47 | PrintAndLog(" sample : lf awid sim 224 1337"); | |
48 | return 0; | |
49 | } | |
50 | ||
51 | int usage_lf_awid_clone(void) { | |
52 | PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7."); | |
53 | PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process."); | |
54 | PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated."); | |
55 | PrintAndLog(""); | |
56 | PrintAndLog("Usage: lf awid clone <Facility-Code> <Card-Number>"); | |
57 | PrintAndLog(" Options : "); | |
58 | PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code"); | |
59 | PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number"); | |
60 | PrintAndLog(""); | |
61 | PrintAndLog(" sample : lf awid clone 224 1337"); | |
62 | return 0; | |
63 | } | |
64 | ||
65 | int CmdAWIDDemodFSK(const char *Cmd) | |
66 | { | |
67 | int findone=0; | |
68 | if(Cmd[0]=='1') findone=1; | |
69 | if (Cmd[0]=='h' || Cmd[0] == 'H') return usage_lf_awid_fskdemod(); | |
70 | UsbCommand c={CMD_AWID_DEMOD_FSK}; | |
71 | c.arg[0]=findone; | |
7838f4be | 72 | clearCommandBuffer(); |
db25599d | 73 | SendCommand(&c); |
74 | return 0; | |
75 | } | |
76 | ||
77 | int getAWIDBits(unsigned int fc, unsigned int cn, uint8_t *AWIDBits) | |
78 | { | |
79 | int i; | |
80 | uint32_t fcode=(fc & 0x000000FF), cnum=(cn & 0x0000FFFF), uBits=0; | |
81 | if (fcode != fc) | |
82 | PrintAndLog("NOTE: Facility code truncated for AWID26 format (8-bit facility code)"); | |
83 | if (cnum!=cn) | |
84 | PrintAndLog("NOTE: Card number was truncated for AWID26 format (16-bit card number)"); | |
85 | ||
86 | AWIDBits[0] = 0x01; // 6-bit Preamble with 2 parity bits | |
87 | AWIDBits[1] = 0x1D; // First byte from card format (26-bit) plus parity bits | |
88 | AWIDBits[2] = 0x80; // Set the next two bits as 0b10 to finish card format | |
89 | uBits = (fcode<<4) + (cnum>>12); | |
90 | if (!parityTest(uBits,12,0)) | |
91 | AWIDBits[2] |= (1<<5); // If not already even parity, set bit to make even | |
92 | uBits = AWIDBits[2]>>5; | |
93 | if (!parityTest(uBits, 3, 1)) | |
94 | AWIDBits[2] |= (1<<4); | |
95 | uBits = fcode>>5; // first 3 bits of facility-code | |
96 | AWIDBits[2] += (uBits<<1); | |
97 | if (!parityTest(uBits, 3, 1)) | |
98 | AWIDBits[2]++; // Set parity bit to make odd parity | |
99 | uBits = (fcode & 0x1C)>>2; | |
100 | AWIDBits[3] = 0; | |
101 | if (!parityTest(uBits,3,1)) | |
102 | AWIDBits[3] |= (1<<4); | |
103 | AWIDBits[3] += (uBits<<5); | |
104 | uBits = ((fcode & 0x3)<<1) + ((cnum & 0x8000)>>15); // Grab/shift 2 LSBs from facility code and add shifted MSB from cardnum | |
105 | if (!parityTest(uBits,3,1)) | |
106 | AWIDBits[3]++; // Set LSB for parity | |
107 | AWIDBits[3]+= (uBits<<1); | |
108 | uBits = (cnum & 0x7000)>>12; | |
109 | AWIDBits[4] = uBits<<5; | |
110 | if (!parityTest(uBits,3,1)) | |
111 | AWIDBits[4] |= (1<<4); | |
112 | uBits = (cnum & 0x0E00)>>9; | |
113 | AWIDBits[4] += (uBits<<1); | |
114 | if (!parityTest(uBits,3,1)) | |
115 | AWIDBits[4]++; // Set LSB for parity | |
116 | uBits = (cnum & 0x1C0)>>6; // Next bits from card number | |
117 | AWIDBits[5]=(uBits<<5); | |
118 | if (!parityTest(uBits,3,1)) | |
119 | AWIDBits[5] |= (1<<4); // Set odd parity bit as needed | |
120 | uBits = (cnum & 0x38)>>3; | |
121 | AWIDBits[5]+= (uBits<<1); | |
122 | if (!parityTest(uBits,3,1)) | |
123 | AWIDBits[5]++; // Set odd parity bit as needed | |
124 | uBits = (cnum & 0x7); // Last three bits from card number! | |
125 | AWIDBits[6] = (uBits<<5); | |
126 | if (!parityTest(uBits,3,1)) | |
127 | AWIDBits[6] |= (1<<4); | |
128 | uBits = (cnum & 0x0FFF); | |
129 | if (!parityTest(uBits,12,1)) | |
130 | AWIDBits[6] |= (1<<3); | |
131 | else | |
132 | AWIDBits[6]++; | |
133 | for (i = 7; i<12; i++) | |
134 | AWIDBits[i]=0x11; | |
135 | return 1; | |
136 | } | |
137 | ||
138 | int CmdAWIDSim(const char *Cmd) | |
139 | { | |
140 | uint32_t fcode = 0, cnum = 0, fc=0, cn=0, i=0; | |
141 | uint8_t *BS, BitStream[12]; | |
142 | uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8 | |
143 | uint64_t arg2 = 50; // clk RF/50 invert=0 | |
144 | BS = BitStream; | |
145 | if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) { | |
146 | return usage_lf_awid_sim(); | |
147 | } | |
148 | ||
149 | fcode=(fc & 0x000000FF); | |
150 | cnum=(cn & 0x0000FFFF); | |
151 | if (fc!=fcode) | |
152 | PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode); | |
153 | if (cn!=cnum) | |
154 | PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum); | |
155 | PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum); | |
156 | PrintAndLog("Press pm3-button to abort simulation or run another command"); | |
157 | // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0 | |
158 | if (getAWIDBits(fc, cn, BS)) { | |
159 | PrintAndLog("Running 'lf simfsk c 50 H 10 L 8 d %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x'", | |
160 | BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6], | |
161 | BS[7],BS[8],BS[9],BS[10],BS[11]); | |
162 | } else | |
163 | PrintAndLog("Error with tag bitstream generation."); | |
164 | UsbCommand c; | |
165 | c.cmd = CMD_FSK_SIM_TAG; | |
166 | c.arg[0] = arg1; // fcHigh<<8 + fcLow | |
167 | c.arg[1] = arg2; // Inversion and clk setting | |
168 | c.arg[2] = 96; // Bitstream length: 96-bits == 12 bytes | |
169 | for (i=0; i < 96; i++) | |
170 | c.d.asBytes[i] = (BS[i/8] & (1<<(7-(i%8))))?1:0; | |
7838f4be | 171 | clearCommandBuffer(); |
172 | SendCommand(&c); | |
db25599d | 173 | return 0; |
174 | } | |
175 | ||
176 | int CmdAWIDClone(const char *Cmd) | |
177 | { | |
f3cfe428 | 178 | clearCommandBuffer(); |
179 | uint32_t fc=0,cn=0,blocks[4] = {0x00107060, 0, 0, 0x11111111}, i=0; | |
180 | uint8_t BitStream[12]; | |
181 | uint8_t *BS=BitStream; | |
7838f4be | 182 | UsbCommand c, resp; |
db25599d | 183 | |
f3cfe428 | 184 | if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) { |
185 | return usage_lf_awid_clone(); | |
186 | } | |
187 | ||
188 | if ((fc & 0xFF) != fc) { | |
189 | fc &= 0xFF; | |
190 | PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc); | |
191 | } | |
192 | ||
193 | if ((cn & 0xFFFF) != cn) { | |
194 | cn &= 0xFFFF; | |
195 | PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn); | |
196 | } | |
197 | ||
198 | if (getAWIDBits(fc,cn,BS)) { | |
199 | PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u (Raw: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x)", | |
200 | fc,cn, BS[0],BS[1],BS[2],BS[3],BS[4],BS[5],BS[6],BS[7],BS[8],BS[9],BS[10],BS[11]); | |
201 | blocks[1] = (BS[0]<<24) + (BS[1]<<16) + (BS[2]<<8) + (BS[3]); | |
202 | blocks[2] = (BS[4]<<24) + (BS[5]<<16) + (BS[6]<<8) + (BS[7]); | |
203 | PrintAndLog("Block 0: 0x%08x", blocks[0]); | |
204 | PrintAndLog("Block 1: 0x%08x", blocks[1]); | |
205 | PrintAndLog("Block 2: 0x%08x", blocks[2]); | |
206 | PrintAndLog("Block 3: 0x%08x", blocks[3]); | |
207 | for (i=0; i<4; i++) { | |
208 | c.cmd = CMD_T55XX_WRITE_BLOCK; | |
209 | c.arg[0] = blocks[i]; | |
210 | c.arg[1] = i; | |
211 | c.arg[2] = 0; | |
212 | SendCommand(&c); | |
7838f4be | 213 | if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){ |
214 | PrintAndLog("Error occurred, device did not respond during write operation."); | |
215 | return -1; | |
216 | } | |
f3cfe428 | 217 | } |
218 | } | |
219 | return 0; | |
db25599d | 220 | } |
221 | ||
222 | static command_t CommandTable[] = | |
223 | { | |
f3cfe428 | 224 | {"help", CmdHelp, 1, "This help"}, |
225 | {"fskdemod", CmdAWIDDemodFSK, 0, "['1'] Realtime AWID FSK demodulator (option '1' for one tag only)"}, | |
226 | {"sim", CmdAWIDSim, 0, "<Facility-Code> <Card Number> -- AWID tag simulator"}, | |
227 | {"clone", CmdAWIDClone, 0, "<Facility-Code> <Card Number> -- Clone AWID to T55x7 (tag must be in range of antenna)"}, | |
228 | {NULL, NULL, 0, NULL} | |
db25599d | 229 | }; |
230 | ||
231 | int CmdLFAWID(const char *Cmd) | |
232 | { | |
f3cfe428 | 233 | CmdsParse(CommandTable, Cmd); |
234 | return 0; | |
db25599d | 235 | } |
236 | ||
237 | int CmdHelp(const char *Cmd) | |
238 | { | |
f3cfe428 | 239 | CmdsHelp(CommandTable); |
240 | return 0; | |
db25599d | 241 | } |