7 #include "cmdhflegic.h"
10 static int CmdHelp(const char *Cmd
);
12 static command_t CommandTable
[] =
14 {"help", CmdHelp
, 1, "This help"},
15 {"decode", CmdLegicDecode
, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
16 {"reader", CmdLegicRFRead
, 0, "[offset [length]] -- read bytes from a LEGIC card"},
20 int CmdHFLegic(const char *Cmd
)
22 CmdsParse(CommandTable
, Cmd
);
26 int CmdHelp(const char *Cmd
)
28 CmdsHelp(CommandTable
);
33 * Output BigBuf and deobfuscate LEGIC RF tag data.
34 * This is based on information given in the talk held
35 * by Henryk Ploetz and Karsten Nohl at 26c3
37 int CmdLegicDecode(const char *Cmd
)
46 int data_buf
[1032]; // receiver buffer
47 char out_string
[3076]; // just use big buffer - bad practice
53 // copy data from proxmark into buffer
54 for (i
= 0; i
< 256; i
+= 12, h
+= 48) {
55 UsbCommand c
= {CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K
, {i
, 0, 0}};
57 WaitForResponse(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K
);
59 for (j
= 0; j
< 48; j
+= 8) {
60 for (k
= 0; k
< 8; k
++) {
61 data_buf
[h
+j
+k
] = sample_buf
[j
+k
];
64 if (delivered
>= 1024)
69 // Output CDF System area (9 bytes) plus remaining header area (12 bytes)
71 PrintAndLog("\nCDF: System Area");
73 PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x",
83 switch (data_buf
[5]&0x7f) {
85 strncpy(token_type
, "IAM",sizeof(token_type
));
88 strcpy(token_type
, "SAM");
91 strcpy(token_type
, "GAM");
94 strcpy(token_type
, "???");
98 stamp_len
= 0xfc - data_buf
[6];
100 PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
104 (data_buf
[5]&0x80)>>7,
108 PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
110 (data_buf
[7]&0x70)>>4,
111 (data_buf
[7]&0x80)>>7,
116 PrintAndLog("Remaining Header Area");
118 PrintAndLog("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
134 PrintAndLog("\nADF: User Area");
137 for (n
=0; n
<64; n
++) {
138 segment_len
= ((data_buf
[i
+1]^crc
)&0x0f) * 256 + (data_buf
[i
]^crc
);
139 segment_flag
= ((data_buf
[i
+1]^crc
)&0xf0)>>4;
141 wrp
= (data_buf
[i
+2]^crc
);
142 wrc
= ((data_buf
[i
+3]^crc
)&0x70)>>4;
144 PrintAndLog("Segment %02u: raw header=%02x %02x %02x %02x, flag=%01x (valid=%01u, last=%01u), len=%04u, WRP=%02u, WRC=%02u, RD=%01u, CRC=%02x",
151 (segment_flag
&0x4)>>2,
152 (segment_flag
&0x8)>>3,
156 ((data_buf
[i
+3]^crc
)&0x80)>>7,
163 PrintAndLog("WRC protected area:");
164 for (k
=0, j
=0; k
< wrc
&& j
<(sizeof(out_string
)-3); k
++, i
++, j
+= 3) {
165 sprintf(&out_string
[j
], "%02x", (data_buf
[i
]^crc
));
166 out_string
[j
+2] = ' ';
169 out_string
[j
] = '\0';
171 PrintAndLog("%s", out_string
);
175 PrintAndLog("Remaining write protected area:");
177 for (k
=0, j
=0; k
< (wrp
-wrc
) && j
<(sizeof(out_string
)-3); k
++, i
++, j
+= 3) {
178 sprintf(&out_string
[j
], "%02x", (data_buf
[i
]^crc
));
179 out_string
[j
+2] = ' ';
182 out_string
[j
] = '\0';
184 PrintAndLog("%s", out_string
);
186 sprintf(out_string
,"Card ID: %2X%02X%02X",data_buf
[i
-4]^crc
,data_buf
[i
-3]^crc
,data_buf
[i
-2]^crc
);
187 PrintAndLog("%s", out_string
);
191 PrintAndLog("Remaining segment payload:");
192 for (k
=0, j
=0; k
< (segment_len
- wrp
- 5) && j
<(sizeof(out_string
)-3); k
++, i
++, j
+= 3) {
193 sprintf(&out_string
[j
], "%02x", (data_buf
[i
]^crc
));
194 out_string
[j
+2] = ' ';
197 out_string
[j
] = '\0';
199 PrintAndLog("%s", out_string
);
201 // end with last segment
202 if (segment_flag
& 0x8)
208 int CmdLegicRFRead(const char *Cmd
)
210 int byte_count
=0,offset
=0;
211 sscanf(Cmd
, "%i %i", &offset
, &byte_count
);
212 if(byte_count
== 0) byte_count
= 256;
213 if(byte_count
+ offset
> 256) byte_count
= 256 - offset
;
214 UsbCommand c
={CMD_READER_LEGIC_RF
, {offset
, byte_count
, 0}};