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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 Farpoint / Pyramid tag commands
8 // FSK2a, rf/50, 128 bits (complete)
9 //-----------------------------------------------------------------------------
10
11 #include "cmdlfpyramid.h"
12
13 #include <string.h>
14 #include <inttypes.h>
15 #include <stdio.h>
16 #include "comms.h"
17 #include "ui.h"
18 #include "util.h"
19 #include "graph.h"
20 #include "cmdparser.h"
21 #include "cmddata.h" // setDemodBuf +
22 #include "cmdmain.h"
23 #include "cmdlf.h"
24 #include "protocols.h" // for T55xx config register definitions
25 #include "lfdemod.h" // parityTest
26 #include "crc.h"
27
28 static int CmdHelp(const char *Cmd);
29
30 int usage_lf_pyramid_clone(void){
31 PrintAndLog("clone a Farpointe/Pyramid tag to a T55x7 tag.");
32 PrintAndLog("The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated. ");
33 PrintAndLog("Currently only works on 26bit");
34 PrintAndLog("");
35 PrintAndLog("Usage: lf pyramid clone <Facility-Code> <Card-Number>");
36 PrintAndLog("Options :");
37 PrintAndLog(" <Facility-Code> : 8-bit value facility code");
38 PrintAndLog(" <Card Number> : 16-bit value card number");
39 PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
40 PrintAndLog("");
41 PrintAndLog("Sample : lf pyramid clone 123 11223");
42 return 0;
43 }
44
45 int usage_lf_pyramid_sim(void) {
46 PrintAndLog("Enables simulation of Farpointe/Pyramid card with specified card number.");
47 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
48 PrintAndLog("The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
49 PrintAndLog("Currently work only on 26bit");
50 PrintAndLog("");
51 PrintAndLog("Usage: lf pyramid sim <Card-Number>");
52 PrintAndLog("Options :");
53 PrintAndLog(" <Facility-Code> : 8-bit value facility code");
54 PrintAndLog(" <Card Number> : 16-bit value card number");
55 PrintAndLog("");
56 PrintAndLog("Sample : lf pyramid sim 123 11223");
57 return 0;
58 }
59
60 // Works for 26bits.
61 int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {
62
63 uint8_t pre[128];
64 memset(pre, 0x00, sizeof(pre));
65
66 // format start bit
67 pre[79] = 1;
68
69 // Get 26 wiegand from FacilityCode, CardNumber
70 uint8_t wiegand[24];
71 memset(wiegand, 0x00, sizeof(wiegand));
72 num_to_bytebits(fc, 8, wiegand);
73 num_to_bytebits(cn, 16, wiegand+8);
74
75 // add wiegand parity bits (dest, source, len)
76 wiegand_add_parity(pre+80, wiegand, 24);
77
78 // add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
79 addParity(pre+8, pyramidBits+8, 102, 8, 1);
80
81 // add checksum
82 uint8_t csBuff[13];
83 for (uint8_t i = 0; i < 13; i++)
84 csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i*8), 8);
85
86 uint32_t crc = CRC8Maxim(csBuff, 13);
87 num_to_bytebits(crc, 8, pyramidBits+120);
88 return 1;
89 }
90
91 //by marshmellow
92 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
93 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
94 int CmdFSKdemodPyramid(const char *Cmd)
95 {
96 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
97 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
98 size_t size = getFromGraphBuf(BitStream);
99 if (size==0) return 0;
100
101 int waveIdx=0;
102 //get binary from fsk wave
103 int idx = PyramiddemodFSK(BitStream, &size, &waveIdx);
104 if (idx < 0){
105 if (g_debugMode){
106 if (idx == -5)
107 PrintAndLog("DEBUG: Error - not enough samples");
108 else if (idx == -1)
109 PrintAndLog("DEBUG: Error - only noise found");
110 else if (idx == -2)
111 PrintAndLog("DEBUG: Error - problem during FSK demod");
112 else if (idx == -3)
113 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
114 else if (idx == -4)
115 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
116 else
117 PrintAndLog("DEBUG: Error - idx: %d",idx);
118 }
119 return 0;
120 }
121 // Index map
122 // 0 10 20 30 40 50 60
123 // | | | | | | |
124 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
125 // -----------------------------------------------------------------------------
126 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
127 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
128
129 // 64 70 80 90 100 110 120
130 // | | | | | | |
131 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
132 // -----------------------------------------------------------------------------
133 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
134 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
135 // |---115---||---------71---------|
136 // s = format start bit, o = odd parity of last 7 bits
137 // f = facility code, c = card number
138 // w = wiegand parity, x = extra space for other formats
139 // p = unknown checksum
140 // (26 bit format shown)
141
142 //get bytes for checksum calc
143 uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
144 uint8_t csBuff[14] = {0x00};
145 for (uint8_t i = 0; i < 13; i++){
146 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
147 }
148 //check checksum calc
149 //checksum calc thanks to ICEMAN!!
150 uint32_t checkCS = CRC8Maxim(csBuff,13);
151
152 //get raw ID before removing parities
153 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
154 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
155 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
156 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
157 setDemodBuf(BitStream,128,idx);
158 setClockGrid(50, waveIdx + (idx*50));
159
160 size = removeParity(BitStream, idx+8, 8, 1, 120);
161 if (size != 105){
162 if (g_debugMode)
163 PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
164 return 0;
165 }
166
167 // ok valid card found!
168
169 // Index map
170 // 0 10 20 30 40 50 60 70
171 // | | | | | | | |
172 // 01234567890123456789012345678901234567890123456789012345678901234567890
173 // -----------------------------------------------------------------------
174 // 00000000000000000000000000000000000000000000000000000000000000000000000
175 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
176
177 // 71 80 90 100
178 // | | | |
179 // 1 2 34567890 1234567890123456 7 8901234
180 // ---------------------------------------
181 // 1 1 01110011 0000000001000110 0 1001010
182 // s w ffffffff cccccccccccccccc w ppppppp
183 // |--115-| |------71------|
184 // s = format start bit, o = odd parity of last 7 bits
185 // f = facility code, c = card number
186 // w = wiegand parity, x = extra space for other formats
187 // p = unknown checksum
188 // (26 bit format shown)
189
190 //find start bit to get fmtLen
191 int j;
192 for (j=0; j<size; j++){
193 if(BitStream[j]) break;
194 }
195 uint8_t fmtLen = size-j-8;
196 uint32_t fc = 0;
197 uint32_t cardnum = 0;
198 uint32_t code1 = 0;
199 if (fmtLen==26){
200 fc = bytebits_to_byte(BitStream+73, 8);
201 cardnum = bytebits_to_byte(BitStream+81, 16);
202 code1 = bytebits_to_byte(BitStream+72,fmtLen);
203 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi3, rawHi2, rawHi, rawLo);
204 } else if (fmtLen==45){
205 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
206 fc = bytebits_to_byte(BitStream+53, 10);
207 cardnum = bytebits_to_byte(BitStream+63, 32);
208 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
209 } else {
210 cardnum = bytebits_to_byte(BitStream+81, 16);
211 if (fmtLen>32){
212 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
213 //code2 = bytebits_to_byte(BitStream+(size-32),32);
214 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
215 } else{
216 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
217 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
218 }
219 }
220 if (checksum == checkCS)
221 PrintAndLog("Checksum %02x passed", checksum);
222 else
223 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
224
225 if (g_debugMode){
226 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
227 printDemodBuff();
228 }
229 return 1;
230 }
231
232 int CmdPyramidRead(const char *Cmd) {
233 lf_read(true, 15000);
234 return CmdFSKdemodPyramid("");
235 }
236
237 int CmdPyramidClone(const char *Cmd) {
238
239 char cmdp = param_getchar(Cmd, 0);
240 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_clone();
241
242 uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0;
243 uint32_t blocks[5];
244 uint8_t i;
245 uint8_t bs[128];
246 memset(bs, 0x00, sizeof(bs));
247
248 if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_clone();
249
250 facilitycode = (fc & 0x000000FF);
251 cardnumber = (cn & 0x0000FFFF);
252
253 if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
254 PrintAndLog("Error with tag bitstream generation.");
255 return 1;
256 }
257
258 //Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks
259 blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4<<T55x7_MAXBLOCK_SHIFT;
260
261 if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
262 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
263
264 blocks[1] = bytebits_to_byte(bs,32);
265 blocks[2] = bytebits_to_byte(bs+32,32);
266 blocks[3] = bytebits_to_byte(bs+64,32);
267 blocks[4] = bytebits_to_byte(bs+96,32);
268
269 PrintAndLog("Preparing to clone Farpointe/Pyramid to T55x7 with Facility Code: %u, Card Number: %u", facilitycode, cardnumber);
270 PrintAndLog("Blk | Data ");
271 PrintAndLog("----+------------");
272 for ( i = 0; i<5; ++i )
273 PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);
274
275 UsbCommand resp;
276 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
277
278 for ( i = 0; i<5; ++i ) {
279 c.arg[0] = blocks[i];
280 c.arg[1] = i;
281 clearCommandBuffer();
282 SendCommand(&c);
283 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
284 PrintAndLog("Error occurred, device did not respond during write operation.");
285 return -1;
286 }
287 }
288 return 0;
289 }
290
291 int CmdPyramidSim(const char *Cmd) {
292
293 char cmdp = param_getchar(Cmd, 0);
294 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_sim();
295
296 uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
297
298 uint8_t bs[128];
299 size_t size = sizeof(bs);
300 memset(bs, 0x00, size);
301
302 // Pyramid uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
303 uint64_t arg1, arg2;
304 arg1 = (10 << 8) + 8;
305 arg2 = 50 | 0;
306
307 if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_sim();
308
309 facilitycode = (fc & 0x000000FF);
310 cardnumber = (cn & 0x0000FFFF);
311
312 if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
313 PrintAndLog("Error with tag bitstream generation.");
314 return 1;
315 }
316
317 PrintAndLog("Simulating Farpointe/Pyramid - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber );
318
319 UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
320 memcpy(c.d.asBytes, bs, size);
321 clearCommandBuffer();
322 SendCommand(&c);
323 return 0;
324 }
325
326 static command_t CommandTable[] = {
327 {"help", CmdHelp, 1, "This help"},
328 {"demod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from the GraphBuffer"},
329 {"read", CmdPyramidRead, 0, "Attempt to read and extract tag data"},
330 {"clone", CmdPyramidClone, 0, "<Facility-Code> <Card Number> clone pyramid tag"},
331 {"sim", CmdPyramidSim, 0, "<Facility-Code> <Card Number> simulate pyramid tag"},
332 {NULL, NULL, 0, NULL}
333 };
334
335 int CmdLFPyramid(const char *Cmd) {
336 clearCommandBuffer();
337 CmdsParse(CommandTable, Cmd);
338 return 0;
339 }
340
341 int CmdHelp(const char *Cmd) {
342 CmdsHelp(CommandTable);
343 return 0;
344 }
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