mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-11 01:55:38 +08:00
365 lines
9.3 KiB
C
365 lines
9.3 KiB
C
//-----------------------------------------------------------------------------
|
|
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
|
|
//
|
|
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
|
|
// at your option, any later version. See the LICENSE.txt file for the text of
|
|
// the license.
|
|
//-----------------------------------------------------------------------------
|
|
// High frequency Legic commands
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include "proxusb.h"
|
|
#include "data.h"
|
|
#include "ui.h"
|
|
#include "cmdparser.h"
|
|
#include "cmdhflegic.h"
|
|
#include "cmdmain.h"
|
|
|
|
static int CmdHelp(const char *Cmd);
|
|
|
|
static command_t CommandTable[] =
|
|
{
|
|
{"help", CmdHelp, 1, "This help"},
|
|
{"decode", CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
|
|
{"reader", CmdLegicRFRead, 0, "[offset [length]] -- read bytes from a LEGIC card"},
|
|
{"save", CmdLegicSave, 0, "<filename> [<length>] -- Store samples"},
|
|
{"load", CmdLegicLoad, 0, "<filename> -- Restore samples"},
|
|
{"sim", CmdLegicRfSim, 0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},
|
|
{"write", CmdLegicRfWrite,0, "<offset> <length> -- Write sample buffer (user after load or read)"},
|
|
{"fill", CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
|
|
{NULL, NULL, 0, NULL}
|
|
};
|
|
|
|
int CmdHFLegic(const char *Cmd)
|
|
{
|
|
CmdsParse(CommandTable, Cmd);
|
|
return 0;
|
|
}
|
|
|
|
int CmdHelp(const char *Cmd)
|
|
{
|
|
CmdsHelp(CommandTable);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Output BigBuf and deobfuscate LEGIC RF tag data.
|
|
* This is based on information given in the talk held
|
|
* by Henryk Ploetz and Karsten Nohl at 26c3
|
|
*/
|
|
int CmdLegicDecode(const char *Cmd)
|
|
{
|
|
int h, i, j, k, n;
|
|
int segment_len = 0;
|
|
int segment_flag = 0;
|
|
int stamp_len = 0;
|
|
int crc = 0;
|
|
int wrp = 0;
|
|
int wrc = 0;
|
|
int data_buf[1032]; // receiver buffer
|
|
char out_string[3076]; // just use big buffer - bad practice
|
|
char token_type[4];
|
|
int delivered = 0;
|
|
|
|
h = 0;
|
|
|
|
// copy data from proxmark into buffer
|
|
for (i = 0; i < 256; i += 12, h += 48) {
|
|
UsbCommand c = {CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K, {i, 0, 0}};
|
|
SendCommand(&c);
|
|
WaitForResponse(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K);
|
|
|
|
for (j = 0; j < 48; j += 8) {
|
|
for (k = 0; k < 8; k++) {
|
|
data_buf[h+j+k] = sample_buf[j+k];
|
|
}
|
|
delivered += 8;
|
|
if (delivered >= 1024)
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Output CDF System area (9 bytes) plus remaining header area (12 bytes)
|
|
|
|
PrintAndLog("\nCDF: System Area");
|
|
|
|
PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x",
|
|
data_buf[0],
|
|
data_buf[1],
|
|
data_buf[2],
|
|
data_buf[3],
|
|
data_buf[4]
|
|
);
|
|
|
|
crc = data_buf[4];
|
|
|
|
switch (data_buf[5]&0x7f) {
|
|
case 0x00 ... 0x2f:
|
|
strncpy(token_type, "IAM",sizeof(token_type));
|
|
break;
|
|
case 0x30 ... 0x6f:
|
|
strcpy(token_type, "SAM");
|
|
break;
|
|
case 0x70 ... 0x7f:
|
|
strcpy(token_type, "GAM");
|
|
break;
|
|
default:
|
|
strcpy(token_type, "???");
|
|
break;
|
|
}
|
|
|
|
stamp_len = 0xfc - data_buf[6];
|
|
|
|
PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
|
|
data_buf[5],
|
|
data_buf[6],
|
|
token_type,
|
|
(data_buf[5]&0x80)>>7,
|
|
stamp_len
|
|
);
|
|
|
|
PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
|
|
data_buf[7]&0x0f,
|
|
(data_buf[7]&0x70)>>4,
|
|
(data_buf[7]&0x80)>>7,
|
|
data_buf[7],
|
|
data_buf[8]
|
|
);
|
|
|
|
PrintAndLog("Remaining Header Area");
|
|
|
|
PrintAndLog("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
|
|
data_buf[9],
|
|
data_buf[10],
|
|
data_buf[11],
|
|
data_buf[12],
|
|
data_buf[13],
|
|
data_buf[14],
|
|
data_buf[15],
|
|
data_buf[16],
|
|
data_buf[17],
|
|
data_buf[18],
|
|
data_buf[19],
|
|
data_buf[20],
|
|
data_buf[21]
|
|
);
|
|
|
|
PrintAndLog("\nADF: User Area");
|
|
|
|
i = 22;
|
|
for (n=0; n<64; n++) {
|
|
segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc);
|
|
segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4;
|
|
|
|
wrp = (data_buf[i+2]^crc);
|
|
wrc = ((data_buf[i+3]^crc)&0x70)>>4;
|
|
|
|
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",
|
|
n,
|
|
data_buf[i]^crc,
|
|
data_buf[i+1]^crc,
|
|
data_buf[i+2]^crc,
|
|
data_buf[i+3]^crc,
|
|
segment_flag,
|
|
(segment_flag&0x4)>>2,
|
|
(segment_flag&0x8)>>3,
|
|
segment_len,
|
|
wrp,
|
|
wrc,
|
|
((data_buf[i+3]^crc)&0x80)>>7,
|
|
(data_buf[i+4]^crc)
|
|
);
|
|
|
|
i+=5;
|
|
|
|
if (wrc>0) {
|
|
PrintAndLog("WRC protected area:");
|
|
for (k=0, j=0; k < wrc && j<(sizeof(out_string)-3); k++, i++, j += 3) {
|
|
sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
|
|
out_string[j+2] = ' ';
|
|
};
|
|
|
|
out_string[j] = '\0';
|
|
|
|
PrintAndLog("%s", out_string);
|
|
}
|
|
|
|
if (wrp>wrc) {
|
|
PrintAndLog("Remaining write protected area:");
|
|
|
|
for (k=0, j=0; k < (wrp-wrc) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
|
|
sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
|
|
out_string[j+2] = ' ';
|
|
};
|
|
|
|
out_string[j] = '\0';
|
|
|
|
PrintAndLog("%s", out_string);
|
|
if((wrp-wrc) == 8) {
|
|
sprintf(out_string,"Card ID: %2X%02X%02X",data_buf[i-4]^crc,data_buf[i-3]^crc,data_buf[i-2]^crc);
|
|
PrintAndLog("%s", out_string);
|
|
}
|
|
}
|
|
|
|
PrintAndLog("Remaining segment payload:");
|
|
for (k=0, j=0; k < (segment_len - wrp - 5) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
|
|
sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
|
|
out_string[j+2] = ' ';
|
|
};
|
|
|
|
out_string[j] = '\0';
|
|
|
|
PrintAndLog("%s", out_string);
|
|
|
|
// end with last segment
|
|
if (segment_flag & 0x8)
|
|
return 0;
|
|
};
|
|
return 0;
|
|
}
|
|
|
|
int CmdLegicRFRead(const char *Cmd)
|
|
{
|
|
int byte_count=0,offset=0;
|
|
sscanf(Cmd, "%i %i", &offset, &byte_count);
|
|
if(byte_count == 0) byte_count = -1;
|
|
if(byte_count + offset > 1024) byte_count = 1024 - offset;
|
|
UsbCommand c={CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
|
|
SendCommand(&c);
|
|
return 0;
|
|
}
|
|
|
|
int CmdLegicLoad(const char *Cmd)
|
|
{
|
|
FILE *f = fopen(Cmd, "r");
|
|
if(!f) {
|
|
PrintAndLog("couldn't open '%s'", Cmd);
|
|
return -1;
|
|
}
|
|
char line[80]; int offset = 0; unsigned int data[8];
|
|
while(fgets(line, sizeof(line), f)) {
|
|
int res = sscanf(line, "%x %x %x %x %x %x %x %x",
|
|
&data[0], &data[1], &data[2], &data[3],
|
|
&data[4], &data[5], &data[6], &data[7]);
|
|
if(res != 8) {
|
|
PrintAndLog("Error: could not read samples");
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
|
|
int j; for(j = 0; j < 8; j++) {
|
|
c.d.asBytes[j] = data[j];
|
|
}
|
|
SendCommand(&c);
|
|
WaitForResponse(CMD_ACK);
|
|
offset += 8;
|
|
}
|
|
fclose(f);
|
|
PrintAndLog("loaded %u samples", offset);
|
|
return 0;
|
|
}
|
|
|
|
int CmdLegicSave(const char *Cmd)
|
|
{
|
|
int n;
|
|
int requested = 1024;
|
|
int offset = 0;
|
|
char filename[1024];
|
|
sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
|
|
if (offset % 4 != 0) {
|
|
PrintAndLog("Offset must be a multiple of 4");
|
|
return 0;
|
|
}
|
|
offset = offset/4;
|
|
|
|
int delivered = 0;
|
|
|
|
if (requested == 0) {
|
|
n = 12;
|
|
requested = 12;
|
|
} else {
|
|
n = requested/4;
|
|
}
|
|
|
|
FILE *f = fopen(filename, "w");
|
|
if(!f) {
|
|
PrintAndLog("couldn't open '%s'", Cmd+1);
|
|
return -1;
|
|
}
|
|
|
|
for (int i = offset; i < n+offset; i += 12) {
|
|
UsbCommand c = {CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K, {i, 0, 0}};
|
|
SendCommand(&c);
|
|
WaitForResponse(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K);
|
|
for (int j = 0; j < 48; j += 8) {
|
|
fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
|
|
sample_buf[j+0],
|
|
sample_buf[j+1],
|
|
sample_buf[j+2],
|
|
sample_buf[j+3],
|
|
sample_buf[j+4],
|
|
sample_buf[j+5],
|
|
sample_buf[j+6],
|
|
sample_buf[j+7]
|
|
);
|
|
delivered += 8;
|
|
if (delivered >= requested)
|
|
break;
|
|
}
|
|
if (delivered >= requested)
|
|
break;
|
|
}
|
|
|
|
fclose(f);
|
|
PrintAndLog("saved %u samples", delivered);
|
|
return 0;
|
|
}
|
|
|
|
int CmdLegicRfSim(const char *Cmd)
|
|
{
|
|
UsbCommand c={CMD_SIMULATE_TAG_LEGIC_RF};
|
|
c.arg[0] = 6;
|
|
c.arg[1] = 3;
|
|
c.arg[2] = 0;
|
|
sscanf(Cmd, " %i %i %i", &c.arg[0], &c.arg[1], &c.arg[2]);
|
|
SendCommand(&c);
|
|
return 0;
|
|
}
|
|
|
|
int CmdLegicRfWrite(const char *Cmd)
|
|
{
|
|
UsbCommand c={CMD_WRITER_LEGIC_RF};
|
|
int res = sscanf(Cmd, " 0x%x 0x%x", &c.arg[0], &c.arg[1]);
|
|
if(res != 2) {
|
|
PrintAndLog("Please specify the offset and length as two hex strings");
|
|
return -1;
|
|
}
|
|
SendCommand(&c);
|
|
return 0;
|
|
}
|
|
|
|
int CmdLegicRfFill(const char *Cmd)
|
|
{
|
|
UsbCommand cmd ={CMD_WRITER_LEGIC_RF};
|
|
int res = sscanf(Cmd, " 0x%x 0x%x 0x%x", &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]);
|
|
if(res != 3) {
|
|
PrintAndLog("Please specify the offset, length and value as two hex strings");
|
|
return -1;
|
|
}
|
|
|
|
int i;
|
|
UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 0, 0}};
|
|
for(i = 0; i < 48; i++) {
|
|
c.d.asBytes[i] = cmd.arg[2];
|
|
}
|
|
for(i = 0; i < 22; i++) {
|
|
c.arg[0] = i*48;
|
|
SendCommand(&c);
|
|
WaitForResponse(CMD_ACK);
|
|
}
|
|
SendCommand(&cmd);
|
|
return 0;
|
|
}
|
|
|