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FIX: T5555/Q5 datarate when used in "Q" parameter, consequential fix in lf commands...
[proxmark3-svn] / client / cmdlfvisa2000.c
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371535d5 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
0a7e86db 12#define BL0CK1 0x56495332
13
371535d5 14static int CmdHelp(const char *Cmd);
15
16int 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
28int 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
0a7e86db 41static 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
ff9c043d 48/**
49*
50* 56495332 00096ebd 00000077 —> tag id 618173
51* aaaaaaaa iiiiiiii -----..c
52*
53* a = fixed value ascii 'VIS2'
54* i = card id
55* c = checksum (xor of card id)
56* . = unknown
57*
58**/
371535d5 59//see ASKDemod for what args are accepted
60int CmdVisa2kDemod(const char *Cmd) {
61
92014925 62 // save GraphBuffer - to restore it later
63 save_restoreGB(1);
64
65 CmdAskEdgeDetect("");
66
371535d5 67 //ASK / Manchester
0a7e86db 68 bool st = TRUE;
371535d5 69 if (!ASKDemod_ext("64 0 0", FALSE, FALSE, 1, &st)) {
70 if (g_debugMode) PrintAndLog("DEBUG: Error - Visa2k: ASK/Manchester Demod failed");
92014925 71 save_restoreGB(0);
371535d5 72 return 0;
73 }
74 size_t size = DemodBufferLen;
75 int ans = Visa2kDemod_AM(DemodBuffer, &size);
76 if (ans < 0){
77 if (g_debugMode){
78 if (ans == -1)
79 PrintAndLog("DEBUG: Error - Visa2k: too few bits found");
80 else if (ans == -2)
81 PrintAndLog("DEBUG: Error - Visa2k: preamble not found");
82 else if (ans == -3)
83 PrintAndLog("DEBUG: Error - Visa2k: Size not correct: %d", size);
84 else
85 PrintAndLog("DEBUG: Error - Visa2k: ans: %d", ans);
86 }
92014925 87 save_restoreGB(0);
371535d5 88 return 0;
89 }
90 setDemodBuf(DemodBuffer, 96, ans);
91
92 //got a good demod
93 uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
94 uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
95 uint32_t raw3 = bytebits_to_byte(DemodBuffer+64, 32);
ff9c043d 96
0a7e86db 97 // chksum
98 uint8_t calc = visa_chksum(raw2);
99 uint8_t chk = raw3 & 0xF;
100 // test checksums
101 if ( chk != calc ) {
102 printf("DEBUG: error: Visa2000 checksum failed %x - %x\n", chk, calc);
92014925 103 save_restoreGB(0);
0a7e86db 104 return 0;
105 }
371535d5 106 PrintAndLog("Visa2000 Tag Found: Card ID %u, Raw: %08X%08X%08X", raw2, raw1 ,raw2, raw3);
92014925 107 save_restoreGB(0);
371535d5 108 return 1;
109}
110
111int CmdVisa2kRead(const char *Cmd) {
112 CmdLFRead("s");
c840385e 113 getSamples("16000",TRUE);
371535d5 114 return CmdVisa2kDemod(Cmd);
115}
116
117int CmdVisa2kClone(const char *Cmd) {
118
119 uint64_t id = 0;
ff9c043d 120 uint32_t blocks[4] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_64 | T55x7_ST_TERMINATOR | 3 << T55x7_MAXBLOCK_SHIFT, BL0CK1, 0};
371535d5 121
371535d5 122 char cmdp = param_getchar(Cmd, 0);
123 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_visa2k_clone();
124
125 id = param_get32ex(Cmd, 0, 0, 10);
126
127 //Q5
128 if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
129 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
ff9c043d 130 blocks[0] = T5555_MODULATION_MANCHESTER | ((64-2)>>1) << T5555_BITRATE_SHIFT | T5555_ST_TERMINATOR | 3 << T5555_MAXBLOCK_SHIFT;
371535d5 131 }
132
371535d5 133 //
371535d5 134 blocks[2] = id;
3acac886 135 blocks[3] = visa_chksum(id);
371535d5 136
137 PrintAndLog("Preparing to clone Visa2000 to T55x7 with CardId: %u", id);
138 PrintAndLog("Blk | Data ");
139 PrintAndLog("----+------------");
3375daee 140 for(int i = 0; i<4; ++i)
3acac886 141 PrintAndLog(" %02d | 0x%08x", i , blocks[i]);
371535d5 142
143 UsbCommand resp;
144 UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
145
146 for (int i = 3; i >= 0; --i) {
147 c.arg[0] = blocks[i];
148 c.arg[1] = i;
149 clearCommandBuffer();
150 SendCommand(&c);
42c235e7 151 if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
371535d5 152 PrintAndLog("Error occurred, device did not respond during write operation.");
153 return -1;
154 }
155 }
156 return 0;
157}
158
159int CmdVisa2kSim(const char *Cmd) {
160
161 uint32_t id = 0;
162 char cmdp = param_getchar(Cmd, 0);
163 if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_visa2k_sim();
164
165 id = param_get32ex(Cmd, 0, 0, 10);
166
167 uint8_t clk = 64, encoding = 1, separator = 1, invert = 0;
168 uint16_t arg1, arg2;
169 size_t size = 96;
170 arg1 = clk << 8 | encoding;
171 arg2 = invert << 8 | separator;
172
173 PrintAndLog("Simulating Visa2000 - CardId: %u", id);
174
175 UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
371535d5 176
0a7e86db 177 uint32_t blocks[3] = { BL0CK1, id, visa_chksum(id) };
178
179 for(int i=0; i<3; ++i)
371535d5 180 num_to_bytebits(blocks[i], 32, c.d.asBytes + i*32);
0a7e86db 181
371535d5 182 clearCommandBuffer();
183 SendCommand(&c);
184 return 0;
185}
186
187static command_t CommandTable[] = {
188 {"help", CmdHelp, 1, "This help"},
189 {"read", CmdVisa2kRead, 0, "Attempt to read and extract tag data"},
190 {"clone", CmdVisa2kClone, 0, "clone Visa2000 tag"},
191 {"sim", CmdVisa2kSim, 0, "simulate Visa2000 tag"},
192 {NULL, NULL, 0, NULL}
193};
194
195int CmdLFVisa2k(const char *Cmd) {
196 clearCommandBuffer();
197 CmdsParse(CommandTable, Cmd);
198 return 0;
199}
200
201int CmdHelp(const char *Cmd) {
202 CmdsHelp(CommandTable);
203 return 0;
204}
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