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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 Paradox tag commands | |
8 | // FSK2a, rf/50, 96 bits (completely known) | |
9 | //----------------------------------------------------------------------------- | |
10 | #include <stdio.h> | |
11 | #include <string.h> | |
12 | #include <inttypes.h> | |
13 | #include "cmdlfparadox.h" | |
14 | #include "proxmark3.h" | |
15 | #include "ui.h" | |
16 | #include "util.h" | |
17 | #include "graph.h" | |
18 | #include "cmdparser.h" | |
19 | #include "cmddata.h" | |
20 | #include "cmdlf.h" | |
21 | #include "lfdemod.h" | |
22 | #include "comms.h" | |
23 | // This card type is similar to HID, so we include the utils from there | |
24 | #include "cmdlfhid.h" | |
25 | #include "hidcardformats.h" | |
26 | #include "hidcardformatutils.h" | |
27 | ||
28 | static int CmdHelp(const char *Cmd); | |
29 | void ParadoxWrite(hidproxmessage_t *packed); | |
30 | ||
31 | //by marshmellow | |
32 | //Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded) | |
33 | //print full Paradox Prox ID and some bit format details if found | |
34 | int CmdFSKdemodParadox(const char *Cmd) | |
35 | { | |
36 | //raw fsk demod no manchester decoding no start bit finding just get binary from wave | |
37 | uint32_t hi2=0, hi=0, lo=0; | |
38 | ||
39 | uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0}; | |
40 | size_t BitLen = getFromGraphBuf(BitStream); | |
41 | if (BitLen==0) return 0; | |
42 | int waveIdx=0; | |
43 | //get binary from fsk wave | |
44 | int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo,&waveIdx); | |
45 | if (idx<0){ | |
46 | if (g_debugMode){ | |
47 | if (idx==-1){ | |
48 | PrintAndLog("DEBUG: Just Noise Detected"); | |
49 | } else if (idx == -2) { | |
50 | PrintAndLog("DEBUG: Error demoding fsk"); | |
51 | } else if (idx == -3) { | |
52 | PrintAndLog("DEBUG: Preamble not found"); | |
53 | } else if (idx == -4) { | |
54 | PrintAndLog("DEBUG: Error in Manchester data"); | |
55 | } else { | |
56 | PrintAndLog("DEBUG: Error demoding fsk %d", idx); | |
57 | } | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | if (hi2==0 && hi==0 && lo==0){ | |
62 | if (g_debugMode) PrintAndLog("DEBUG: Error - no value found"); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | uint32_t fc = ((hi & 0x3)<<6) | (lo>>26); | |
67 | uint32_t cardnum = (lo>>10)&0xFFFF; | |
68 | uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32); | |
69 | uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32); | |
70 | uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32); | |
71 | ||
72 | // Steal the HID parsing to output a "full" ID we can send to the HID cloning function | |
73 | hidproxmessage_t packed = initialize_proxmessage_object(hi2, hi, lo); | |
74 | ||
75 | if (packed.top != 0) { | |
76 | PrintAndLog("Paradox TAG ID: %x%08x (Full ID: %x%08x%08x) - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x", | |
77 | hi>>10, (hi & 0x3)<<26 | (lo>>10), (uint32_t)packed.top, (uint32_t)packed.mid, (uint32_t)packed.bot, fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo); | |
78 | } else { | |
79 | PrintAndLog("Paradox TAG ID: %x%08x (Full ID: %x%08x) - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x", | |
80 | hi>>10, (hi & 0x3)<<26 | (lo>>10), (uint32_t)packed.mid, (uint32_t)packed.bot, fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo); | |
81 | ||
82 | } | |
83 | setDemodBuf(BitStream,BitLen,idx); | |
84 | setClockGrid(50, waveIdx + (idx*50)); | |
85 | if (g_debugMode){ | |
86 | PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen); | |
87 | printDemodBuff(); | |
88 | } | |
89 | return 1; | |
90 | } | |
91 | //by marshmellow | |
92 | //see ASKDemod for what args are accepted | |
93 | int CmdParadoxRead(const char *Cmd) { | |
94 | // read lf silently | |
95 | lf_read(true, 10000); | |
96 | // demod and output viking ID | |
97 | return CmdFSKdemodParadox(Cmd); | |
98 | } | |
99 | ||
100 | int CmdParadoxClone(const char *Cmd) | |
101 | { | |
102 | unsigned int top = 0, mid = 0, bot = 0; | |
103 | hid_hexstring_to_int96(&top, &mid, &bot, Cmd); | |
104 | hidproxmessage_t packed = initialize_proxmessage_object(top, mid, bot); | |
105 | ParadoxWrite(&packed); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | void ParadoxWrite(hidproxmessage_t *packed){ | |
110 | UsbCommand c; | |
111 | c.d.asBytes[0] = (packed->top != 0 && ((packed->mid & 0xFFFFFFC0) != 0)) | |
112 | ? 1 : 0; // Writing long format? | |
113 | c.cmd = CMD_PARADOX_CLONE_TAG; | |
114 | c.arg[0] = (packed->top & 0x000FFFFF); | |
115 | c.arg[1] = packed->mid; | |
116 | c.arg[2] = packed->bot; | |
117 | SendCommand(&c); | |
118 | } | |
119 | ||
120 | static command_t CommandTable[] = { | |
121 | {"help", CmdHelp, 1, "This help"}, | |
122 | {"demod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from the GraphBuffer"}, | |
123 | {"read", CmdParadoxRead, 0, "Attempt to read and Extract tag data from the antenna"}, | |
124 | {"clone", CmdParadoxClone, 0, "<ID> -- Clone Paradox to T55x7 (tag must be in antenna)"}, | |
125 | {NULL, NULL, 0, NULL} | |
126 | }; | |
127 | ||
128 | int CmdLFParadox(const char *Cmd) { | |
129 | CmdsParse(CommandTable, Cmd); | |
130 | return 0; | |
131 | } | |
132 | ||
133 | int CmdHelp(const char *Cmd) { | |
134 | CmdsHelp(CommandTable); | |
135 | return 0; | |
136 | } |