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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 //-----------------------------------------------------------------------------
13 #include "proxmark3.h"
16 #include "cmdlfcotag.h"
21 static int CmdHelp(const char *Cmd
);
23 int usage_lf_cotag_read(void){
24 PrintAndLog("Usage: lf COTAG read [h] <signaldata>");
25 PrintAndLog("Options:");
26 PrintAndLog(" h : This help");
27 PrintAndLog(" <0|1|2> : 0 - HIGH/LOW signal; maxlength bigbuff");
28 PrintAndLog(" : 1 - translation of HI/LO into bytes with manchester 0,1");
29 PrintAndLog(" : 2 - raw signal; maxlength bigbuff");
31 PrintAndLog("Sample:");
32 PrintAndLog(" lf cotag read 0");
33 PrintAndLog(" lf cotag read 1");
37 // COTAG demod should be able to use GraphBuffer,
38 // when data load samples
39 int CmdCOTAGDemod(const char *Cmd
) {
41 uint8_t bits
[COTAG_BITS
] = {0};
42 size_t bitlen
= COTAG_BITS
;
43 memcpy(bits
, DemodBuffer
, COTAG_BITS
);
46 int err
= manrawdecode(bits
, &bitlen
, 1, &alignPos
);
48 if (g_debugMode
) PrintAndLog("DEBUG: Error - COTAG too many errors: %d", err
);
52 setDemodBuf(bits
, bitlen
, 0);
55 uint16_t cn
= bytebits_to_byteLSBF(bits
+1, 16);
56 uint32_t fc
= bytebits_to_byteLSBF(bits
+1+16, 8);
58 uint32_t raw1
= bytebits_to_byteLSBF(bits
, 32);
59 uint32_t raw2
= bytebits_to_byteLSBF(bits
+32, 32);
60 uint32_t raw3
= bytebits_to_byteLSBF(bits
+64, 32);
61 uint32_t raw4
= bytebits_to_byteLSBF(bits
+96, 32);
64 fc 161: 1010 0001 -> LSB 1000 0101
65 cn 33593 1000 0011 0011 1001 -> LSB 1001 1100 1100 0001
66 cccc cccc cccc cccc ffffffff
67 0 1001 1100 1100 0001 1000 0101 0000 0000 100001010000000001111011100000011010000010000000000000000000000000000000000000000000000000000000100111001100000110000101000
68 1001 1100 1100 0001 10000101
70 PrintAndLog("COTAG Found: FC %u, CN: %u Raw: %08X%08X%08X%08X", fc
, cn
, raw1
,raw2
, raw3
, raw4
);
74 // When reading a COTAG.
75 // 0 = HIGH/LOW signal - maxlength bigbuff
76 // 1 = translation for HI/LO into bytes with manchester 0,1 - length 300
77 // 2 = raw signal - maxlength bigbuff
78 int CmdCOTAGRead(const char *Cmd
) {
80 if (Cmd
[0] == 'h' || Cmd
[0] == 'H') return usage_lf_cotag_read();
82 uint32_t rawsignal
= 1;
83 sscanf(Cmd
, "%u", &rawsignal
);
85 UsbCommand c
= {CMD_COTAG
, {rawsignal
, 0, 0}};
88 if ( !WaitForResponseTimeout(CMD_ACK
, NULL
, 7000) ) {
89 PrintAndLog("command execution time out");
98 getSamples(0, true); break;
102 DemodBufferLen
= COTAG_BITS
;
103 if (!GetFromBigBuf(DemodBuffer
, COTAG_BITS
, 0, &response
, 1000, true)) {
104 PrintAndLog("timeout while waiting for reply.");
107 return CmdCOTAGDemod("");
113 static command_t CommandTable
[] = {
114 {"help", CmdHelp
, 1, "This help"},
115 {"demod", CmdCOTAGDemod
, 1, "Tries to decode a COTAG signal"},
116 {"read", CmdCOTAGRead
, 0, "Attempt to read and extract tag data"},
117 {NULL
, NULL
, 0, NULL
}
120 int CmdLFCOTAG(const char *Cmd
) {
121 clearCommandBuffer();
122 CmdsParse(CommandTable
, Cmd
);
126 int CmdHelp(const char *Cmd
) {
127 CmdsHelp(CommandTable
);