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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 "cmdlfjablotron.h"
11
12 static int CmdHelp(const char *Cmd);
13
14 int usage_lf_jablotron_clone(void){
15 PrintAndLog("clone a Jablotron tag to a T55x7 tag.");
16 PrintAndLog("Usage: lf jablotron clone [h] <card ID> <Q5>");
17 PrintAndLog("Options:");
18 PrintAndLog(" h : This help");
19 PrintAndLog(" <card ID> : jablotron card ID");
20 PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");
21 PrintAndLog("");
22 PrintAndLog("Sample: lf jablotron clone 112233");
23 return 0;
24 }
25
26 int usage_lf_jablotron_sim(void) {
27 PrintAndLog("Enables simulation of jablotron card with specified card number.");
28 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
29 PrintAndLog("");
30 PrintAndLog("Usage: lf jablotron sim [h] <card ID>");
31 PrintAndLog("Options:");
32 PrintAndLog(" h : This help");
33 PrintAndLog(" <card ID> : jablotron card ID");
34 PrintAndLog("");
35 PrintAndLog("Sample: lf jablotron sim 112233");
36 return 0;
37 }
38
39 static uint8_t jablontron_chksum(uint8_t *bits){
40 uint8_t chksum = 0;
41 for (int i=16; i < 56; i += 8) {
42 chksum += bytebits_to_byte(bits+i,8);
43 }
44 chksum ^= 0x3A;
45 return chksum;
46 }
47
48 int getJablotronBits(uint64_t fullcode, uint8_t *bits) {
49 //preamp
50 num_to_bytebits(0xFFFF, 16, bits);
51
52 //fullcode
53 num_to_bytebits(fullcode, 40, bits+16);
54
55 //chksum byte
56 uint8_t chksum = jablontron_chksum(bits);
57 num_to_bytebits(chksum, 8, bits+56);
58 return 1;
59 }
60
61 static uint64_t getJablontronCardId( uint64_t rawcode ){
62 uint64_t id = 0;
63 uint8_t bytes[] = {0,0,0,0,0};
64 num_to_bytes(rawcode, 5, bytes);
65 for ( int i = 4, j = 0; i > -1; --i, j += 2 ) {
66 id += NIBBLE_LOW( bytes[i] ) * (int)pow(10,j);
67 id += NIBBLE_HIGH( bytes[i] ) * (int)pow(10,j+1);
68 }
69 return id;
70 }
71
72 //see ASKDemod for what args are accepted
73 int CmdJablotronDemod(const char *Cmd) {
74
75 //Differential Biphase / di-phase (inverted biphase)
76 //get binary from ask wave
77 if (!ASKbiphaseDemod("0 64 1 0", FALSE)) {
78 if (g_debugMode) PrintAndLog("DEBUG: Error - Jablotron ASKbiphaseDemod failed");
79 return 0;
80 }
81 size_t size = DemodBufferLen;
82 int ans = JablotronDemod(DemodBuffer, &size);
83 if (ans < 0){
84 if (g_debugMode){
85 if (ans == -1)
86 PrintAndLog("DEBUG: Error - Jablotron too few bits found");
87 else if (ans == -2)
88 PrintAndLog("DEBUG: Error - Jablotron preamble not found");
89 else if (ans == -3)
90 PrintAndLog("DEBUG: Error - Jablotron size not correct: %d", size);
91 else if (ans == -5)
92 PrintAndLog("DEBUG: Error - Jablotron checksum failed");
93 else
94 PrintAndLog("DEBUG: Error - Jablotron ans: %d", ans);
95 }
96 return 0;
97 }
98
99 setDemodBuf(DemodBuffer+ans, 64, 0);
100
101 //got a good demod
102 uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
103 uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
104
105 uint64_t rawid = bytebits_to_byte(DemodBuffer+16, 40);
106 uint64_t id = getJablontronCardId(rawid);
107
108 PrintAndLog("Jablotron Tag Found: Card ID %u", id);
109 PrintAndLog("Raw: %08X%08X", raw1 ,raw2);
110
111 uint8_t chksum = raw2 & 0xFF;
112 PrintAndLog("Checksum: %02X [%s]",
113 chksum,
114 (chksum == jablontron_chksum(DemodBuffer)) ? "OK":"FAIL"
115 );
116
117 id = DEC2BCD(id);
118 // Printed format: 1410-nn-nnnn-nnnn
119 PrintAndLog("Printed: 1410-%02X-%04X-%04X",
120 (uint8_t)(id >> 32) & 0xFF,
121 (uint16_t)(id >> 16) & 0xFFFF,
122 (uint16_t)id & 0xFFFF
123 );
124 return 1;
125 }
126
127 int CmdJablotronRead(const char *Cmd) {
128 CmdLFRead("s");
129 getSamples("20000", TRUE);
130 return CmdJablotronDemod(Cmd);
131 }
132
133 int CmdJablotronClone(const char *Cmd) {
134
135 uint64_t fullcode = 0;
136 uint32_t blocks[3] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_64 | 2<<T55x7_MAXBLOCK_SHIFT, 0, 0};
137
138 uint8_t bits[64];
139 uint8_t *bs = bits;
140 memset(bs, 0, sizeof(bits));
141
142 char cmdp = param_getchar(Cmd, 0);
143 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_clone();
144
145 fullcode = param_get64ex(Cmd, 0, 0, 16);
146
147 //Q5
148 if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
149 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
150 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 64<<T5555_BITRATE_SHIFT | 2<<T5555_MAXBLOCK_SHIFT;
151 }
152
153 // clearing the topbit needed for the preambl detection.
154 if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
155 fullcode &= 0x7FFFFFFFFF;
156 PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
157 }
158
159 if ( !getJablotronBits(fullcode, bs)) {
160 PrintAndLog("Error with tag bitstream generation.");
161 return 1;
162 }
163
164 //
165 blocks[1] = bytebits_to_byte(bs,32);
166 blocks[2] = bytebits_to_byte(bs+32,32);
167
168 PrintAndLog("Preparing to clone Jablotron to T55x7 with FullCode: %"PRIx64, fullcode);
169 PrintAndLog("Blk | Data ");
170 PrintAndLog("----+------------");
171 PrintAndLog(" 00 | 0x%08x", blocks[0]);
172 PrintAndLog(" 01 | 0x%08x", blocks[1]);
173 PrintAndLog(" 02 | 0x%08x", blocks[2]);
174
175 UsbCommand resp;
176 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
177
178 for (int i = 2; i >= 0; --i) {
179 c.arg[0] = blocks[i];
180 c.arg[1] = i;
181 clearCommandBuffer();
182 SendCommand(&c);
183 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
184 PrintAndLog("Error occurred, device did not respond during write operation.");
185 return -1;
186 }
187 }
188 return 0;
189 }
190
191 int CmdJablotronSim(const char *Cmd) {
192 uint64_t fullcode = 0;
193
194 char cmdp = param_getchar(Cmd, 0);
195 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_sim();
196
197 fullcode = param_get64ex(Cmd, 0, 0, 16);
198
199 // clearing the topbit needed for the preambl detection.
200 if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
201 fullcode &= 0x7FFFFFFFFF;
202 PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
203 }
204
205 uint8_t clk = 64, encoding = 2, separator = 0, invert = 1;
206 uint16_t arg1, arg2;
207 size_t size = 64;
208 arg1 = clk << 8 | encoding;
209 arg2 = invert << 8 | separator;
210
211 PrintAndLog("Simulating Jablotron - FullCode: %"PRIx64, fullcode);
212
213 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
214 getJablotronBits(fullcode, c.d.asBytes);
215 clearCommandBuffer();
216 SendCommand(&c);
217 return 0;
218 }
219
220 static command_t CommandTable[] = {
221 {"help", CmdHelp, 1, "This help"},
222 {"read", CmdJablotronRead, 0, "Attempt to read and extract tag data"},
223 {"clone", CmdJablotronClone, 0, "clone jablotron tag"},
224 {"sim", CmdJablotronSim, 0, "simulate jablotron tag"},
225 {NULL, NULL, 0, NULL}
226 };
227
228 int CmdLFJablotron(const char *Cmd) {
229 clearCommandBuffer();
230 CmdsParse(CommandTable, Cmd);
231 return 0;
232 }
233
234 int CmdHelp(const char *Cmd) {
235 CmdsHelp(CommandTable);
236 return 0;
237 }
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