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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 fdx-b tag commands |
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8 | // Differential Biphase, rf/32, 128 bits (known) |
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9 | //----------------------------------------------------------------------------- |
10 | |
11 | #include "cmdlffdx.h" |
12 | |
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13 | #include <stdio.h> |
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14 | #include <inttypes.h> |
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15 | #include <string.h> |
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16 | #include "proxmark3.h" |
17 | #include "ui.h" // for PrintAndLog |
18 | #include "util.h" |
19 | #include "cmdparser.h" |
20 | #include "cmddata.h" |
21 | #include "cmdmain.h" |
22 | #include "cmdlf.h" |
23 | #include "crc16.h" |
24 | #include "protocols.h" |
25 | #include "lfdemod.h" |
26 | |
27 | /* |
28 | FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits) |
29 | 8 databits + 1 parity (1) |
30 | CIITT 16 checksum |
31 | NATIONAL CODE, ICAR database |
32 | COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf |
33 | FLAG (animal/non-animal) |
34 | |
35 | 38 IDbits |
36 | 10 country code |
37 | 1 extra app bit |
38 | 14 reserved bits |
39 | 1 animal bit |
40 | 16 ccitt CRC chksum over 64bit ID CODE. |
41 | 24 appli bits. |
42 | |
43 | sample: 985121004515220 [ 37FF65B88EF94 ] |
44 | */ |
45 | |
46 | static int CmdHelp(const char *Cmd); |
47 | |
48 | int usage_lf_fdx_clone(void){ |
49 | PrintAndLog("Clone a FDX-B animal tag to a T55x7 tag."); |
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50 | PrintAndLog("Usage: lf fdx clone [h] <country id> <animal id> <Q5>"); |
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51 | PrintAndLog("Options:"); |
52 | PrintAndLog(" h : This help"); |
53 | PrintAndLog(" <country id> : Country id"); |
54 | PrintAndLog(" <animal id> : Animal id"); |
55 | // has extended data? |
56 | //reserved/rfu |
57 | //is animal tag |
58 | // extended data |
59 | PrintAndLog(" <Q5> : Specify write to Q5 (t5555 instead of t55x7)"); |
60 | PrintAndLog(""); |
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61 | PrintAndLog("Sample: lf fdx clone 999 112233"); |
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62 | return 0; |
63 | } |
64 | |
65 | int usage_lf_fdx_sim(void) { |
66 | PrintAndLog("Enables simulation of FDX-B animal tag"); |
67 | PrintAndLog("Simulation runs until the button is pressed or another USB command is issued."); |
68 | PrintAndLog(""); |
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69 | PrintAndLog("Usage: lf fdx sim [h] <country id> <animal id>"); |
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70 | PrintAndLog("Options:"); |
71 | PrintAndLog(" h : This help"); |
72 | PrintAndLog(" <country id> : Country ID"); |
73 | PrintAndLog(" <animal id> : Animal ID"); |
74 | PrintAndLog(""); |
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75 | PrintAndLog("Sample: lf fdx sim 999 112233"); |
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76 | return 0; |
77 | } |
78 | // clearing the topbit needed for the preambl detection. |
79 | static void verify_values(uint32_t countryid, uint64_t animalid){ |
80 | if ((animalid & 0x3FFFFFFFFF) != animalid) { |
81 | animalid &= 0x3FFFFFFFFF; |
82 | PrintAndLog("Animal ID Truncated to 38bits: %"PRIx64, animalid); |
83 | } |
84 | if ( (countryid & 0x3ff) != countryid ) { |
85 | countryid &= 0x3ff; |
86 | PrintAndLog("Country ID Truncated to 10bits: %03d", countryid); |
87 | } |
88 | } |
89 | |
90 | int getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) { |
91 | |
92 | // 128bits |
93 | // every 9th bit is 0x01, but we can just fill the rest with 0x01 and overwrite |
94 | memset(bits, 0x01, 128); |
95 | |
96 | // add preamble ten 0x00 and one 0x01 |
97 | memset(bits, 0x00, 10); |
98 | |
99 | // add reserved |
100 | num_to_bytebitsLSBF(0x00, 7, bits + 66); |
101 | num_to_bytebitsLSBF(0x00 >> 7, 7, bits + 74); |
102 | |
103 | // add animal flag - OK |
104 | bits[65] = isanimal; |
105 | |
106 | // add extended flag - OK |
107 | bits[81] = isextended; |
108 | |
109 | // add national code 40bits - OK |
110 | num_to_bytebitsLSBF(national_id >> 0, 8, bits+11); |
111 | num_to_bytebitsLSBF(national_id >> 8, 8, bits+20); |
112 | num_to_bytebitsLSBF(national_id >> 16, 8, bits+29); |
113 | num_to_bytebitsLSBF(national_id >> 24, 8, bits+38); |
114 | num_to_bytebitsLSBF(national_id >> 32, 6, bits+47); |
115 | |
116 | // add country code - OK |
117 | num_to_bytebitsLSBF(country >> 0, 2, bits+53); |
118 | num_to_bytebitsLSBF(country >> 2, 8, bits+56); |
119 | |
120 | // add crc-16 - OK |
121 | uint8_t raw[8]; |
122 | for (uint8_t i=0; i<8; ++i) |
123 | raw[i] = bytebits_to_byte(bits + 11 + i * 9, 8); |
124 | |
125 | uint16_t crc = crc16_ccitt_kermit(raw, 8); |
126 | num_to_bytebitsLSBF(crc >> 0, 8, bits+83); |
127 | num_to_bytebitsLSBF(crc >> 8, 8, bits+92); |
128 | |
129 | // extended data - OK |
130 | num_to_bytebitsLSBF( extended >> 0 , 8, bits+101); |
131 | num_to_bytebitsLSBF( extended >> 8 , 8, bits+110); |
132 | num_to_bytebitsLSBF( extended >> 16, 8, bits+119); |
133 | return 1; |
134 | } |
135 | |
136 | int CmdFdxDemod(const char *Cmd){ |
137 | |
138 | //Differential Biphase / di-phase (inverted biphase) |
139 | //get binary from ask wave |
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140 | if (!ASKbiphaseDemod("0 32 1 0", false)) { |
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141 | if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B ASKbiphaseDemod failed"); |
142 | return 0; |
143 | } |
144 | size_t size = DemodBufferLen; |
145 | int preambleIndex = FDXBdemodBI(DemodBuffer, &size); |
146 | if (preambleIndex < 0){ |
147 | if (g_debugMode){ |
148 | if (preambleIndex == -1) |
149 | PrintAndLog("DEBUG: Error - FDX-B too few bits found"); |
150 | else if (preambleIndex == -2) |
151 | PrintAndLog("DEBUG: Error - FDX-B preamble not found"); |
152 | else if (preambleIndex == -3) |
153 | PrintAndLog("DEBUG: Error - FDX-B Size not correct: %d", size); |
154 | else |
155 | PrintAndLog("DEBUG: Error - FDX-B ans: %d", preambleIndex); |
156 | } |
157 | return 0; |
158 | } |
159 | |
160 | // set and leave DemodBuffer intact |
161 | setDemodBuf(DemodBuffer, 128, preambleIndex); |
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162 | setClockGrid(g_DemodClock, g_DemodStartIdx + (preambleIndex*g_DemodClock)); |
163 | |
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164 | uint8_t bits_no_spacer[117]; |
165 | memcpy(bits_no_spacer, DemodBuffer + 11, 117); |
166 | |
167 | // remove marker bits (1's every 9th digit after preamble) (pType = 2) |
168 | size = removeParity(bits_no_spacer, 0, 9, 2, 117); |
169 | if ( size != 104 ) { |
170 | if (g_debugMode) PrintAndLog("DEBUG: Error removeParity:: %d", size); |
171 | return 0; |
172 | } |
173 | |
174 | //got a good demod |
175 | uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(bits_no_spacer+32,6)) << 32) | bytebits_to_byteLSBF(bits_no_spacer,32); |
176 | uint32_t countryCode = bytebits_to_byteLSBF(bits_no_spacer+38,10); |
177 | uint8_t dataBlockBit = bits_no_spacer[48]; |
178 | uint32_t reservedCode = bytebits_to_byteLSBF(bits_no_spacer+49,14); |
179 | uint8_t animalBit = bits_no_spacer[63]; |
180 | uint32_t crc16 = bytebits_to_byteLSBF(bits_no_spacer+64,16); |
181 | uint32_t extended = bytebits_to_byteLSBF(bits_no_spacer+80,24); |
182 | |
183 | uint64_t rawid = ((uint64_t)bytebits_to_byte(bits_no_spacer,32)<<32) | bytebits_to_byte(bits_no_spacer+32,32); |
184 | uint8_t raw[8]; |
185 | num_to_bytes(rawid, 8, raw); |
186 | |
187 | if (g_debugMode) { |
188 | PrintAndLog("DEBUG: bits_no_spacer:\n%s",sprint_bin_break(bits_no_spacer,size,16)); |
189 | PrintAndLog("DEBUG: Start marker %d; Size %d", preambleIndex, size); |
190 | PrintAndLog("DEBUG: Raw ID Hex: %s", sprint_hex(raw,8)); |
191 | } |
192 | |
193 | uint16_t calcCrc = crc16_ccitt_kermit(raw, 8); |
194 | PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:"); |
195 | PrintAndLog("Animal ID: %04u-%012" PRIu64, countryCode, NationalCode); |
196 | PrintAndLog("National Code: %012" PRIu64, NationalCode); |
197 | PrintAndLog("CountryCode: %04u", countryCode); |
198 | PrintAndLog("Reserved Code: %u", reservedCode); |
199 | PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False"); |
200 | PrintAndLog("Has Extended: %s [0x%X]", dataBlockBit ? "True" : "False", extended); |
201 | PrintAndLog("CRC: 0x%04X - 0x%04X - [%s]\n", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed"); |
202 | |
203 | // set block 0 for later |
204 | //g_DemodConfig = T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT; |
205 | return 1; |
206 | } |
207 | |
208 | int CmdFdxRead(const char *Cmd) { |
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209 | lf_read(true, 10000); |
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210 | return CmdFdxDemod(Cmd); |
211 | } |
212 | |
213 | int CmdFdxClone(const char *Cmd) { |
214 | |
215 | uint32_t countryid = 0; |
216 | uint64_t animalid = 0; |
217 | uint32_t blocks[5] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0}; |
218 | uint8_t bits[128]; |
219 | uint8_t *bs = bits; |
220 | memset(bs, 0, sizeof(bits)); |
221 | |
222 | char cmdp = param_getchar(Cmd, 0); |
223 | if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_clone(); |
224 | |
225 | countryid = param_get32ex(Cmd, 0, 0, 10); |
226 | animalid = param_get64ex(Cmd, 1, 0, 10); |
227 | |
228 | //Q5 |
229 | if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q') { |
230 | //t5555 (Q5) BITRATE = (RF-2)/2 (iceman) |
231 | blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | ((32-2)>>1) << T5555_BITRATE_SHIFT | 4 << T5555_MAXBLOCK_SHIFT; |
232 | } |
233 | |
234 | verify_values(countryid, animalid); |
235 | |
236 | // getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) |
237 | if ( !getFDXBits(animalid, countryid, 1, 0, 0, bs)) { |
238 | PrintAndLog("Error with tag bitstream generation."); |
239 | return 1; |
240 | } |
241 | |
242 | // convert from bit stream to block data |
243 | blocks[1] = bytebits_to_byte(bs,32); |
244 | blocks[2] = bytebits_to_byte(bs+32,32); |
245 | blocks[3] = bytebits_to_byte(bs+64,32); |
246 | blocks[4] = bytebits_to_byte(bs+96,32); |
247 | |
248 | PrintAndLog("Preparing to clone FDX-B to T55x7 with animal ID: %04u-%"PRIu64, countryid, animalid); |
249 | PrintAndLog("Blk | Data "); |
250 | PrintAndLog("----+------------"); |
251 | PrintAndLog(" 00 | 0x%08x", blocks[0]); |
252 | PrintAndLog(" 01 | 0x%08x", blocks[1]); |
253 | PrintAndLog(" 02 | 0x%08x", blocks[2]); |
254 | PrintAndLog(" 03 | 0x%08x", blocks[3]); |
255 | PrintAndLog(" 04 | 0x%08x", blocks[4]); |
256 | |
257 | UsbCommand resp; |
258 | UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}}; |
259 | |
260 | for (int i = 4; i >= 0; --i) { |
261 | c.arg[0] = blocks[i]; |
262 | c.arg[1] = i; |
263 | clearCommandBuffer(); |
264 | SendCommand(&c); |
265 | if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){ |
266 | PrintAndLog("Error occurred, device did not respond during write operation."); |
267 | return -1; |
268 | } |
269 | } |
270 | return 0; |
271 | } |
272 | |
273 | int CmdFdxSim(const char *Cmd) { |
274 | uint32_t countryid = 0; |
275 | uint64_t animalid = 0; |
276 | |
277 | char cmdp = param_getchar(Cmd, 0); |
278 | if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_sim(); |
279 | |
280 | countryid = param_get32ex(Cmd, 0, 0, 10); |
281 | animalid = param_get64ex(Cmd, 1, 0, 10); |
282 | |
283 | verify_values(countryid, animalid); |
284 | |
285 | uint8_t clk = 32, encoding = 2, separator = 0, invert = 1; |
286 | uint16_t arg1, arg2; |
287 | size_t size = 128; |
288 | arg1 = clk << 8 | encoding; |
289 | arg2 = invert << 8 | separator; |
290 | |
291 | PrintAndLog("Simulating FDX-B animal ID: %04u-%"PRIu64, countryid, animalid); |
292 | |
293 | UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}}; |
294 | |
295 | //getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) |
296 | getFDXBits(animalid, countryid, 1, 0, 0, c.d.asBytes); |
297 | clearCommandBuffer(); |
298 | SendCommand(&c); |
299 | return 0; |
300 | } |
301 | |
302 | static command_t CommandTable[] = { |
303 | {"help", CmdHelp, 1, "This help"}, |
304 | {"demod", CmdFdxDemod,1, "Attempt to extract FDX-B ISO11784/85 data from the GraphBuffer"}, |
305 | {"read", CmdFdxRead, 0, "Attempt to read and extract FDX-B ISO11784/85 data"}, |
306 | {"clone", CmdFdxClone,0, "Clone animal ID tag to T55x7 (or to q5/T5555)"}, |
307 | {"sim", CmdFdxSim, 0, "Animal ID tag simulator"}, |
308 | {NULL, NULL, 0, NULL} |
309 | }; |
310 | |
311 | int CmdLFFdx(const char *Cmd) { |
312 | clearCommandBuffer(); |
313 | CmdsParse(CommandTable, Cmd); |
314 | return 0; |
315 | } |
316 | |
317 | int CmdHelp(const char *Cmd) { |
318 | CmdsHelp(CommandTable); |
319 | return 0; |
320 | } |