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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 Viking tag commands
8 //-----------------------------------------------------------------------------
9 #include <stdio.h>
10 #include <string.h>
11 #include <inttypes.h>
12 #include "proxmark3.h"
13 #include "ui.h"
14 #include "util.h"
15 #include "graph.h"
16 #include "cmdparser.h"
17 #include "cmddata.h"
18 #include "cmdmain.h"
19 #include "cmdlf.h"
20 #include "cmdlfviking.h"
21 #include "lfdemod.h"
22 static int CmdHelp(const char *Cmd);
23
24 int usage_lf_viking_clone(void) {
25 PrintAndLog("clone a Viking AM tag to a T55x7 tag.");
26 PrintAndLog("Usage: lf viking clone <Card ID - 8 hex digits> <Q5>");
27 PrintAndLog("Options :");
28 PrintAndLog(" <Card Number> : 8 digit hex viking card number");
29 PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");
30 PrintAndLog("");
31 PrintAndLog("Sample : lf viking clone 1A337 Q5");
32 return 0;
33 }
34
35 int usage_lf_viking_sim(void) {
36 PrintAndLog("Enables simulation of viking card with specified card number.");
37 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
38 PrintAndLog("Per viking format, the card number is 8 digit hex number. Larger values are truncated.");
39 PrintAndLog("");
40 PrintAndLog("Usage: lf viking sim <Card-Number>");
41 PrintAndLog("Options :");
42 PrintAndLog(" <Card Number> : 8 digit hex viking card number");
43 PrintAndLog("");
44 PrintAndLog("Sample : lf viking sim 1A337");
45 return 0;
46 }
47
48 uint64_t getVikingBits(uint32_t id) {
49 //calc checksum
50 uint8_t checksum = ((id>>24) & 0xFF) ^ ((id>>16) & 0xFF) ^ ((id>>8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;
51 return ((uint64_t)0xF2 << 56) | ((uint64_t)id << 8) | checksum;
52 }
53 //by marshmellow
54 //see ASKDemod for what args are accepted
55 int CmdVikingRead(const char *Cmd) {
56 // read lf silently
57 CmdLFRead("s");
58 // get samples silently
59 getSamples("30000",false);
60 // demod and output viking ID
61 return CmdVikingDemod(Cmd);
62 }
63
64 int CmdVikingClone(const char *Cmd) {
65 uint32_t id = 0;
66 uint64_t rawID = 0;
67 bool Q5 = false;
68 char cmdp = param_getchar(Cmd, 0);
69 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();
70
71 id = param_get32ex(Cmd, 0, 0, 16);
72 if (id == 0) return usage_lf_viking_clone();
73 if (param_getchar(Cmd, 1)=='Q' || param_getchar(Cmd, 1)=='q')
74 Q5 = true;
75
76 rawID = getVikingBits(id);
77 PrintAndLog("Cloning - ID: %08X, Raw: %08X%08X",id,(uint32_t)(rawID >> 32),(uint32_t) (rawID & 0xFFFFFFFF));
78 UsbCommand c = {CMD_VIKING_CLONE_TAG,{rawID >> 32, rawID & 0xFFFFFFFF, Q5}};
79 clearCommandBuffer();
80 SendCommand(&c);
81 //check for ACK
82 WaitForResponse(CMD_ACK,NULL);
83 return 0;
84 }
85
86 int CmdVikingSim(const char *Cmd) {
87 uint32_t id = 0;
88 uint64_t rawID = 0;
89 uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;
90 char cmdp = param_getchar(Cmd, 0);
91
92 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();
93 id = param_get32ex(Cmd, 0, 0, 16);
94 if (id == 0) return usage_lf_viking_sim();
95
96 rawID = getVikingBits(id);
97
98 uint16_t arg1, arg2;
99 size_t size = 64;
100 arg1 = clk << 8 | encoding;
101 arg2 = invert << 8 | separator;
102
103 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
104 PrintAndLog("preparing to sim ask data: %d bits", size);
105 num_to_bytebits(rawID, 64, c.d.asBytes);
106 clearCommandBuffer();
107 SendCommand(&c);
108 return 0;
109 }
110
111 static command_t CommandTable[] = {
112 {"help", CmdHelp, 1, "This help"},
113 {"read", CmdVikingRead, 0, "Attempt to read and Extract tag data"},
114 {"clone", CmdVikingClone, 0, "<8 digit ID number> clone viking tag"},
115 {"sim", CmdVikingSim, 0, "<8 digit ID number> simulate viking tag"},
116 {NULL, NULL, 0, NULL}
117 };
118
119 int CmdLFViking(const char *Cmd) {
120 CmdsParse(CommandTable, Cmd);
121 return 0;
122 }
123
124 int CmdHelp(const char *Cmd) {
125 CmdsHelp(CommandTable);
126 return 0;
127 }
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