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1 //-----------------------------------------------------------------------------
2 //
3 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
4 // at your option, any later version. See the LICENSE.txt file for the text of
5 // the license.
6 //-----------------------------------------------------------------------------
7 // Low frequency Presco tag commands
8 //-----------------------------------------------------------------------------
9
10 #include "cmdlffdx.h"
11
12 /*
13 FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
14 8 databits + 1 parity (1)
15 CIITT 16 checksum
16 NATIONAL CODE, ICAR database
17 COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
18 FLAG (animal/non-animal)
19
20 38 IDbits
21 10 country code
22 1 extra app bit
23 14 reserved bits
24 1 animal bit
25 16 ccitt CRC chksum over 64bit ID CODE.
26 24 appli bits.
27
28 sample: 985121004515220 [ 37FF65B88EF94 ]
29 */
30
31 static int CmdHelp(const char *Cmd);
32
33 int usage_lf_fdx_clone(void){
34 PrintAndLog("clone a FDX-B Animal tag to a T55x7 tag.");
35 PrintAndLog("Usage: lf fdx clone [h] <country id> <animal id> <Q5>");
36 PrintAndLog("Options:");
37 PrintAndLog(" h : This help");
38 PrintAndLog(" <country id> : Country id");
39 PrintAndLog(" <animal id> : Animal id");
40 // has extended data?
41 //reserved/rfu
42 //is animal tag
43 // extended data
44 PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");
45 PrintAndLog("");
46 PrintAndLog("Sample: lf fdx clone 999 112233");
47 return 0;
48 }
49
50 int usage_lf_fdx_sim(void) {
51 PrintAndLog("Enables simulation of FDX-B Animal tag");
52 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
53 PrintAndLog("");
54 PrintAndLog("Usage: lf fdx sim [h] <country id> <animal id>");
55 PrintAndLog("Options:");
56 PrintAndLog(" h : This help");
57 PrintAndLog(" <country id> : Country id");
58 PrintAndLog(" <animal id> : Animal id");
59 PrintAndLog("");
60 PrintAndLog("Sample: lf fdx sim 999 112233");
61 return 0;
62 }
63 // clearing the topbit needed for the preambl detection.
64 static void verify_values(uint32_t countryid, uint64_t animalid){
65 if ((animalid & 0x3FFFFFFFFF) != animalid) {
66 animalid &= 0x3FFFFFFFFF;
67 PrintAndLog("Animal ID Truncated to 38bits: %"PRIx64, animalid);
68 }
69 if ( (countryid & 0x3ff) != countryid ) {
70 countryid &= 0x3ff;
71 PrintAndLog("Country ID Truncated to 10bits: %03d", countryid);
72 }
73 }
74
75 int getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) {
76
77 // add preamble ten 0x00 and one 0x01
78 memset(bits, 0x00, 10);
79 bits[10] = 1;
80
81 // 128bits
82 // every 9th bit is 0x01, but we can just fill the rest with 0x01 and overwrite
83 memset(bits, 0x01, 128);
84
85 // add preamble ten 0x00 and one 0x01
86 memset(bits, 0x00, 10);
87
88 // add reserved
89 num_to_bytebitsLSBF(0x00, 7, bits + 66);
90 num_to_bytebitsLSBF(0x00 >> 7, 7, bits + 74);
91
92 // add animal flag - OK
93 bits[65] = isanimal;
94
95 // add extended flag - OK
96 bits[81] = isextended;
97
98 // add national code 40bits - OK
99 num_to_bytebitsLSBF(national_id >> 0, 8, bits+11);
100 num_to_bytebitsLSBF(national_id >> 8, 8, bits+20);
101 num_to_bytebitsLSBF(national_id >> 16, 8, bits+29);
102 num_to_bytebitsLSBF(national_id >> 24, 8, bits+38);
103 num_to_bytebitsLSBF(national_id >> 32, 6, bits+47);
104
105 // add country code - OK
106 num_to_bytebitsLSBF(country >> 0, 2, bits+53);
107 num_to_bytebitsLSBF(country >> 2, 8, bits+56);
108
109 // add crc-16 - OK
110 uint8_t raw[8];
111 for (uint8_t i=0; i<8; ++i)
112 raw[i] = bytebits_to_byte(bits + 11 + i * 9, 8);
113
114 uint16_t crc = crc16_ccitt_kermit(raw, 8);
115 num_to_bytebitsLSBF(crc >> 0, 8, bits+83);
116 num_to_bytebitsLSBF(crc >> 8, 8, bits+92);
117
118 // extended data - OK
119 num_to_bytebitsLSBF( extended >> 0 , 8, bits+101);
120 num_to_bytebitsLSBF( extended >> 8 , 8, bits+110);
121 num_to_bytebitsLSBF( extended >> 16, 8, bits+119);
122 return 1;
123 }
124
125 //see ASKDemod for what args are accepted
126 //almost the same demod as cmddata.c/CmdFDXBdemodBI
127 int CmdFdxDemod(const char *Cmd) {
128
129 //Differential Biphase / di-phase (inverted biphase)
130 //get binary from ask wave
131 if (!ASKbiphaseDemod("0 32 1 0", FALSE)) {
132 if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B ASKbiphaseDemod failed");
133 return 0;
134 }
135 size_t size = DemodBufferLen;
136 int ans = FDXBdemodBI(DemodBuffer, &size);
137 if (ans < 0){
138 if (g_debugMode){
139 if (ans == -1)
140 PrintAndLog("DEBUG: Error - FDX-B too few bits found");
141 else if (ans == -2)
142 PrintAndLog("DEBUG: Error - FDX-B preamble not found");
143 else if (ans == -3)
144 PrintAndLog("DEBUG: Error - FDX-B Size not correct: %d", size);
145 else
146 PrintAndLog("DEBUG: Error - FDX-B ans: %d", ans);
147 }
148 return 0;
149 }
150
151 setDemodBuf(DemodBuffer, 128, ans);
152 // remove marker bits (1's every 9th digit after preamble) (pType = 2)
153 size = removeParity(DemodBuffer, 11, 9, 2, 117);
154 if ( size != 104 ) {
155 if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B error removeParity: %d", size);
156 return 0;
157 }
158
159 //got a good demod
160 uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(DemodBuffer+32,6)) << 32) | bytebits_to_byteLSBF(DemodBuffer,32);
161 uint16_t countryCode = bytebits_to_byteLSBF(DemodBuffer+38,10);
162 uint8_t dataBlockBit = DemodBuffer[48];
163 uint32_t reservedCode = bytebits_to_byteLSBF(DemodBuffer+49,14);
164 uint8_t animalBit = DemodBuffer[63];
165 uint32_t crc16 = bytebits_to_byteLSBF(DemodBuffer+64,16);
166 uint32_t extended = bytebits_to_byteLSBF(DemodBuffer+80,24);
167 uint64_t rawid = ((uint64_t)
168 //bytebits_to_byte(DemodBuffer, 8) << 96) |
169 //bytebits_to_byte(DemodBuffer,32) << 64) |
170 bytebits_to_byte(DemodBuffer,32) << 32) |
171 bytebits_to_byte(DemodBuffer+32, 32);
172 uint8_t raw[8];
173 num_to_bytes(rawid, 8, raw);
174
175 uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
176
177 PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found: Raw : %s", sprint_hex(raw, 8));
178 PrintAndLog("Animal ID %04u-%012llu", countryCode, NationalCode);
179 PrintAndLog("National Code %012llu (0x%llX)", NationalCode, NationalCode);
180 PrintAndLog("Country Code %04u", countryCode);
181 PrintAndLog("Reserved/RFU %u (0x04%X)", reservedCode, reservedCode);
182 PrintAndLog("");
183 PrintAndLog("Animal Tag %s", animalBit ? "True" : "False");
184 PrintAndLog("Has extended data %s [0x%X]", dataBlockBit ? "True" : "False", extended);
185 PrintAndLog("CRC-16 0x%04X - 0x%04X [%s]", crc16, calcCrc, (calcCrc == crc16) ? "Ok" : "Failed");
186
187 if (g_debugMode) {
188 PrintAndLog("Start marker %d; Size %d", ans, size);
189 char *bin = sprint_bin_break(DemodBuffer, size, 16);
190 PrintAndLog("DEBUG bin stream:\n%s", bin);
191 }
192 return 1;
193 }
194
195 int CmdFdxRead(const char *Cmd) {
196 CmdLFRead("s");
197 getSamples("12000", TRUE);
198 return CmdFdxDemod(Cmd);
199 }
200
201 int CmdFdxClone(const char *Cmd) {
202
203 uint32_t countryid = 0;
204 uint64_t animalid = 0;
205 uint32_t blocks[5] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0};
206 uint8_t bits[128];
207 uint8_t *bs = bits;
208 memset(bs, 0, sizeof(bits));
209
210 char cmdp = param_getchar(Cmd, 0);
211 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_clone();
212
213 countryid = param_get32ex(Cmd, 0, 0, 10);
214 animalid = param_get64ex(Cmd, 1, 0, 10);
215
216 //Q5
217 if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
218 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
219 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 32<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
220 }
221
222 verify_values(countryid, animalid);
223
224 // getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits)
225 if ( !getFDXBits(animalid, countryid, 1, 0, 0, bs)) {
226 PrintAndLog("Error with tag bitstream generation.");
227 return 1;
228 }
229
230 // convert from bit stream to block data
231 blocks[1] = bytebits_to_byte(bs,32);
232 blocks[2] = bytebits_to_byte(bs+32,32);
233 blocks[3] = bytebits_to_byte(bs+64,32);
234 blocks[4] = bytebits_to_byte(bs+96,32);
235
236 PrintAndLog("Preparing to clone FDX-B to T55x7 with animal ID: %04u-%"PRIu64, countryid, animalid);
237 PrintAndLog("Blk | Data ");
238 PrintAndLog("----+------------");
239 PrintAndLog(" 00 | 0x%08x", blocks[0]);
240 PrintAndLog(" 01 | 0x%08x", blocks[1]);
241 PrintAndLog(" 02 | 0x%08x", blocks[2]);
242 PrintAndLog(" 03 | 0x%08x", blocks[3]);
243 PrintAndLog(" 04 | 0x%08x", blocks[4]);
244
245 UsbCommand resp;
246 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
247
248 for (int i = 4; i >= 0; --i) {
249 c.arg[0] = blocks[i];
250 c.arg[1] = i;
251 clearCommandBuffer();
252 SendCommand(&c);
253 if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
254 PrintAndLog("Error occurred, device did not respond during write operation.");
255 return -1;
256 }
257 }
258 return 0;
259 }
260
261 int CmdFdxSim(const char *Cmd) {
262 uint32_t countryid = 0;
263 uint64_t animalid = 0;
264
265 char cmdp = param_getchar(Cmd, 0);
266 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_sim();
267
268 countryid = param_get32ex(Cmd, 0, 0, 10);
269 animalid = param_get64ex(Cmd, 1, 0, 10);
270
271 verify_values(countryid, animalid);
272
273 uint8_t clk = 32, encoding = 2, separator = 0, invert = 1;
274 uint16_t arg1, arg2;
275 size_t size = 128;
276 arg1 = clk << 8 | encoding;
277 arg2 = invert << 8 | separator;
278
279 PrintAndLog("Simulating FDX-B animal ID: %04u-%"PRIu64, countryid, animalid);
280
281 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
282
283 //getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits)
284 getFDXBits(animalid, countryid, 1, 0, 0, c.d.asBytes);
285 clearCommandBuffer();
286 SendCommand(&c);
287 return 0;
288 }
289
290 static command_t CommandTable[] = {
291 {"help", CmdHelp, 1, "This help"},
292 {"demod", CmdFdxDemod,1, "Attempt extract tag data from graphbuf"},
293 {"read", CmdFdxRead, 0, "Attempt to read and extract tag data"},
294 {"clone", CmdFdxClone,0, "Clone animal ID tag to T55x7"},
295 {"sim", CmdFdxSim, 0, "Animal ID tag simulator"},
296 {NULL, NULL, 0, NULL}
297 };
298
299 int CmdLFFdx(const char *Cmd) {
300 clearCommandBuffer();
301 CmdsParse(CommandTable, Cmd);
302 return 0;
303 }
304
305 int CmdHelp(const char *Cmd) {
306 CmdsHelp(CommandTable);
307 return 0;
308 }
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