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git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfcotag.c
1 //-----------------------------------------------------------------------------
4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
5 // at your option, any later version. See the LICENSE.txt file for the text of
7 //-----------------------------------------------------------------------------
8 // Low frequency COTAG commands
9 //-----------------------------------------------------------------------------
11 #include "cmdlfcotag.h"
23 static int CmdHelp(const char *Cmd
);
25 int usage_lf_cotag_read(void){
26 PrintAndLog("Usage: lf COTAG read [h] <signaldata>");
27 PrintAndLog("Options:");
28 PrintAndLog(" h : This help");
29 PrintAndLog(" <0|1|2> : 0 - HIGH/LOW signal; maxlength bigbuff");
30 PrintAndLog(" : 1 - translation of HI/LO into bytes with manchester 0,1");
31 PrintAndLog(" : 2 - raw signal; maxlength bigbuff");
33 PrintAndLog("Sample:");
34 PrintAndLog(" lf cotag read 0");
35 PrintAndLog(" lf cotag read 1");
39 // COTAG demod should be able to use GraphBuffer,
40 // when data load samples
41 int CmdCOTAGDemod(const char *Cmd
) {
43 uint8_t bits
[COTAG_BITS
] = {0};
44 size_t bitlen
= COTAG_BITS
;
45 memcpy(bits
, DemodBuffer
, COTAG_BITS
);
48 int err
= manrawdecode(bits
, &bitlen
, 1, &alignPos
);
50 if (g_debugMode
) PrintAndLog("DEBUG: Error - COTAG too many errors: %d", err
);
54 setDemodBuf(bits
, bitlen
, 0);
57 uint16_t cn
= bytebits_to_byteLSBF(bits
+1, 16);
58 uint32_t fc
= bytebits_to_byteLSBF(bits
+1+16, 8);
60 uint32_t raw1
= bytebits_to_byteLSBF(bits
, 32);
61 uint32_t raw2
= bytebits_to_byteLSBF(bits
+32, 32);
62 uint32_t raw3
= bytebits_to_byteLSBF(bits
+64, 32);
63 uint32_t raw4
= bytebits_to_byteLSBF(bits
+96, 32);
66 fc 161: 1010 0001 -> LSB 1000 0101
67 cn 33593 1000 0011 0011 1001 -> LSB 1001 1100 1100 0001
68 cccc cccc cccc cccc ffffffff
69 0 1001 1100 1100 0001 1000 0101 0000 0000 100001010000000001111011100000011010000010000000000000000000000000000000000000000000000000000000100111001100000110000101000
70 1001 1100 1100 0001 10000101
72 PrintAndLog("COTAG Found: FC %u, CN: %u Raw: %08X%08X%08X%08X", fc
, cn
, raw1
,raw2
, raw3
, raw4
);
76 // When reading a COTAG.
77 // 0 = HIGH/LOW signal - maxlength bigbuff
78 // 1 = translation for HI/LO into bytes with manchester 0,1 - length 300
79 // 2 = raw signal - maxlength bigbuff
80 int CmdCOTAGRead(const char *Cmd
) {
82 if (Cmd
[0] == 'h' || Cmd
[0] == 'H') return usage_lf_cotag_read();
84 uint32_t rawsignal
= 1;
85 sscanf(Cmd
, "%u", &rawsignal
);
87 UsbCommand c
= {CMD_COTAG
, {rawsignal
, 0, 0}};
90 if ( !WaitForResponseTimeout(CMD_ACK
, NULL
, 7000) ) {
91 PrintAndLog("command execution time out");
100 getSamples(0, true); break;
104 DemodBufferLen
= COTAG_BITS
;
105 if (!GetFromBigBuf(DemodBuffer
, COTAG_BITS
, 0, &response
, 1000, true)) {
106 PrintAndLog("timeout while waiting for reply.");
109 return CmdCOTAGDemod("");
115 static command_t CommandTable
[] = {
116 {"help", CmdHelp
, 1, "This help"},
117 {"demod", CmdCOTAGDemod
, 1, "Tries to decode a COTAG signal"},
118 {"read", CmdCOTAGRead
, 0, "Attempt to read and extract tag data"},
119 {NULL
, NULL
, 0, NULL
}
122 int CmdLFCOTAG(const char *Cmd
) {
123 clearCommandBuffer();
124 CmdsParse(CommandTable
, Cmd
);
128 int CmdHelp(const char *Cmd
) {
129 CmdsHelp(CommandTable
);