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CHG: 'LF VISA2000 CLONE' fixed the wrong blocknum index in output. Thanks @martin...
[proxmark3-svn] / client / cmdlfvisa2000.c
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 Presco tag commands
8 //-----------------------------------------------------------------------------
9
10 #include "cmdlfvisa2000.h"
11
12 #define BL0CK1 0x56495332
13
14 static int CmdHelp(const char *Cmd);
15
16 int usage_lf_visa2k_clone(void){
17 PrintAndLog("clone a Visa2000 tag to a T55x7 tag.");
18 PrintAndLog("Usage: lf visa2k clone [h] <card ID> <Q5>");
19 PrintAndLog("Options:");
20 PrintAndLog(" h : This help");
21 PrintAndLog(" <card ID> : Visa2k card ID");
22 PrintAndLog(" <Q5> : specify write to Q5 (t5555 instead of t55x7)");
23 PrintAndLog("");
24 PrintAndLog("Sample: lf visa2k clone 112233");
25 return 0;
26 }
27
28 int usage_lf_visa2k_sim(void) {
29 PrintAndLog("Enables simulation of visa2k card with specified card number.");
30 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
31 PrintAndLog("");
32 PrintAndLog("Usage: lf visa2k sim [h] <card ID>");
33 PrintAndLog("Options:");
34 PrintAndLog(" h : This help");
35 PrintAndLog(" <card ID> : Visa2k card ID");
36 PrintAndLog("");
37 PrintAndLog("Sample: lf visa2k sim 112233");
38 return 0;
39 }
40
41 static uint8_t visa_chksum( uint32_t id ) {
42 uint8_t sum = 0;
43 for (uint8_t i = 0; i < 32; i += 4)
44 sum ^= (id >> i) & 0xF;
45 return sum & 0xF;
46 }
47
48 //see ASKDemod for what args are accepted
49 int CmdVisa2kDemod(const char *Cmd) {
50
51 //ASK / Manchester
52 bool st = TRUE;
53 if (!ASKDemod_ext("64 0 0", FALSE, FALSE, 1, &st)) {
54 if (g_debugMode) PrintAndLog("DEBUG: Error - Visa2k: ASK/Manchester Demod failed");
55 return 0;
56 }
57 size_t size = DemodBufferLen;
58 int ans = Visa2kDemod_AM(DemodBuffer, &size);
59 if (ans < 0){
60 if (g_debugMode){
61 if (ans == -1)
62 PrintAndLog("DEBUG: Error - Visa2k: too few bits found");
63 else if (ans == -2)
64 PrintAndLog("DEBUG: Error - Visa2k: preamble not found");
65 else if (ans == -3)
66 PrintAndLog("DEBUG: Error - Visa2k: Size not correct: %d", size);
67 else
68 PrintAndLog("DEBUG: Error - Visa2k: ans: %d", ans);
69 }
70 return 0;
71 }
72 setDemodBuf(DemodBuffer, 96, ans);
73
74 //got a good demod
75 uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
76 uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
77 uint32_t raw3 = bytebits_to_byte(DemodBuffer+64, 32);
78
79 // chksum
80 uint8_t calc = visa_chksum(raw2);
81 uint8_t chk = raw3 & 0xF;
82 // test checksums
83 if ( chk != calc ) {
84 printf("DEBUG: error: Visa2000 checksum failed %x - %x\n", chk, calc);
85 return 0;
86 }
87 PrintAndLog("Visa2000 Tag Found: Card ID %u, Raw: %08X%08X%08X", raw2, raw1 ,raw2, raw3);
88
89 return 1;
90 }
91
92 int CmdVisa2kRead(const char *Cmd) {
93 CmdLFRead("s");
94 getSamples("20000",TRUE);
95 return CmdVisa2kDemod(Cmd);
96 }
97
98 int CmdVisa2kClone(const char *Cmd) {
99
100 uint64_t id = 0;
101 uint32_t blocks[4] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_64 | T55x7_ST_TERMINATOR |3<<T55x7_MAXBLOCK_SHIFT, BL0CK1, 0};
102
103 char cmdp = param_getchar(Cmd, 0);
104 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_visa2k_clone();
105
106 id = param_get32ex(Cmd, 0, 0, 10);
107
108 //Q5
109 if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
110 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
111 blocks[0] = T5555_MODULATION_MANCHESTER | 64<<T5555_BITRATE_SHIFT | T5555_ST_TERMINATOR | 3<<T5555_MAXBLOCK_SHIFT;
112 }
113
114 //
115 blocks[2] = id;
116 blocks[3] = visa_chksum( id);
117
118 PrintAndLog("Preparing to clone Visa2000 to T55x7 with CardId: %u", id);
119 PrintAndLog("Blk | Data ");
120 PrintAndLog("----+------------");
121 for(int i = 0; i<4; ++i)
122 PrintAndLog(" %02d | 0x%08x", i , blocks[i]);
123
124 UsbCommand resp;
125 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
126
127 for (int i = 3; i >= 0; --i) {
128 c.arg[0] = blocks[i];
129 c.arg[1] = i;
130 clearCommandBuffer();
131 SendCommand(&c);
132 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
133 PrintAndLog("Error occurred, device did not respond during write operation.");
134 return -1;
135 }
136 }
137 return 0;
138 }
139
140 int CmdVisa2kSim(const char *Cmd) {
141
142 uint32_t id = 0;
143 char cmdp = param_getchar(Cmd, 0);
144 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_visa2k_sim();
145
146 id = param_get32ex(Cmd, 0, 0, 10);
147
148 uint8_t clk = 64, encoding = 1, separator = 1, invert = 0;
149 uint16_t arg1, arg2;
150 size_t size = 96;
151 arg1 = clk << 8 | encoding;
152 arg2 = invert << 8 | separator;
153
154 PrintAndLog("Simulating Visa2000 - CardId: %u", id);
155
156 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
157
158 uint32_t blocks[3] = { BL0CK1, id, visa_chksum(id) };
159
160 for(int i=0; i<3; ++i)
161 num_to_bytebits(blocks[i], 32, c.d.asBytes + i*32);
162
163 clearCommandBuffer();
164 SendCommand(&c);
165 return 0;
166 }
167
168 static command_t CommandTable[] = {
169 {"help", CmdHelp, 1, "This help"},
170 {"read", CmdVisa2kRead, 0, "Attempt to read and extract tag data"},
171 {"clone", CmdVisa2kClone, 0, "clone Visa2000 tag"},
172 {"sim", CmdVisa2kSim, 0, "simulate Visa2000 tag"},
173 {NULL, NULL, 0, NULL}
174 };
175
176 int CmdLFVisa2k(const char *Cmd) {
177 clearCommandBuffer();
178 CmdsParse(CommandTable, Cmd);
179 return 0;
180 }
181
182 int CmdHelp(const char *Cmd) {
183 CmdsHelp(CommandTable);
184 return 0;
185 }
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