mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2025-08-14 02:27:26 -07:00
CHG: merged the forum user @jason 's fixes to LEGIC. *UNTESTED*
CHG: changed the CRC implementations.
This commit is contained in:
iceman1001
parent
83dad64b91
commit
3e134b4c20
16 changed files with 1368 additions and 163 deletions
|
|
@ -7,27 +7,21 @@
|
|||
//-----------------------------------------------------------------------------
|
||||
// High frequency Legic commands
|
||||
//-----------------------------------------------------------------------------
|
||||
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include "proxmark3.h"
|
||||
#include "data.h"
|
||||
#include "ui.h"
|
||||
#include "cmdparser.h"
|
||||
#include "cmdhflegic.h"
|
||||
#include "cmdmain.h"
|
||||
#include "util.h"
|
||||
#include "crc.h"
|
||||
|
||||
static int CmdHelp(const char *Cmd);
|
||||
|
||||
int usage_legic_calccrc8(void){
|
||||
PrintAndLog("Calculates the legic crc8 on the input hexbytes.");
|
||||
PrintAndLog("Calculates the legic crc8/crc16 on the input hexbytes.");
|
||||
PrintAndLog("There must be an even number of hexsymbols as input.");
|
||||
PrintAndLog("Usage: hf legic crc8 <hexbytes>");
|
||||
PrintAndLog("Usage: hf legic crc8 [h] b <hexbytes> u <uidcrc>");
|
||||
PrintAndLog("Options :");
|
||||
PrintAndLog(" <hexbytes> : hex bytes in a string");
|
||||
PrintAndLog(" b <hexbytes> : hex bytes");
|
||||
PrintAndLog(" u <uidcrc> : MCC hexbyte");
|
||||
PrintAndLog("");
|
||||
PrintAndLog("Sample : hf legic crc8 deadbeef1122");
|
||||
PrintAndLog("Samples :");
|
||||
PrintAndLog(" hf legic crc8 b deadbeef1122");
|
||||
PrintAndLog(" hf legic crc8 b deadbeef1122 u 9A");
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -64,8 +58,10 @@ int CmdLegicDecode(const char *Cmd) {
|
|||
int crc = 0;
|
||||
int wrp = 0;
|
||||
int wrc = 0;
|
||||
uint8_t data_buf[1024]; // receiver buffer, should be 1024..
|
||||
char token_type[4];
|
||||
uint8_t data_buf[1052]; // receiver buffer, should be 1024..
|
||||
char token_type[5];
|
||||
int dcf;
|
||||
int bIsSegmented = 0;
|
||||
|
||||
// download EML memory, where the "legic read" command puts the data.
|
||||
GetEMLFromBigBuf(data_buf, sizeof(data_buf), 0);
|
||||
|
|
@ -89,71 +85,120 @@ int CmdLegicDecode(const char *Cmd) {
|
|||
(calc_crc == crc) ? "OK":"Fail"
|
||||
);
|
||||
|
||||
|
||||
token_type[0] = 0;
|
||||
dcf = ((int)data_buf[6] << 8) | (int)data_buf[5];
|
||||
|
||||
// New unwritten media?
|
||||
if(dcf == 0xFFFF) {
|
||||
|
||||
PrintAndLog("DCF: %d (%02x %02x), Token Type=NM (New Media)",
|
||||
dcf,
|
||||
data_buf[5],
|
||||
data_buf[6]
|
||||
);
|
||||
|
||||
} else if(dcf > 60000) { // Master token?
|
||||
|
||||
int fl = 0;
|
||||
|
||||
if(data_buf[6] == 0xec) {
|
||||
strncpy(token_type, "XAM", sizeof(token_type));
|
||||
fl = 1;
|
||||
stamp_len = 0x0c - (data_buf[5] >> 4);
|
||||
} else {
|
||||
switch (data_buf[5] & 0x7f) {
|
||||
case 0x00 ... 0x2f:
|
||||
strncpy(token_type, "IAM",sizeof(token_type));
|
||||
fl = (0x2f - (data_buf[5] & 0x7f)) + 1;
|
||||
break;
|
||||
case 0x30 ... 0x6f:
|
||||
strncpy(token_type, "SAM",sizeof(token_type));
|
||||
fl = (0x6f - (data_buf[5] & 0x7f)) + 1;
|
||||
break;
|
||||
case 0x70 ... 0x7f:
|
||||
strncpy(token_type, "GAM",sizeof(token_type));
|
||||
break;
|
||||
default:
|
||||
strncpy(token_type, "???",sizeof(token_type));
|
||||
fl = (0x7f - (data_buf[5] & 0x7f)) + 1;
|
||||
break;
|
||||
}
|
||||
|
||||
stamp_len = 0xfc - data_buf[6];
|
||||
}
|
||||
|
||||
PrintAndLog("DCF: %02x %02x, Token Type=%s (OLE=%01u), Stamp len=%02u",
|
||||
PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u), OL=%02u, FL=%02u",
|
||||
dcf,
|
||||
data_buf[5],
|
||||
data_buf[6],
|
||||
token_type,
|
||||
(data_buf[5]&0x80)>>7,
|
||||
stamp_len
|
||||
stamp_len,
|
||||
fl
|
||||
);
|
||||
|
||||
PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
|
||||
} else { // Is IM(-S) type of card...
|
||||
|
||||
if(data_buf[7] == 0x9F && data_buf[8] == 0xFF) {
|
||||
bIsSegmented = 1;
|
||||
strncpy(token_type, "IM-S", sizeof(token_type));
|
||||
} else {
|
||||
strncpy(token_type, "IM", sizeof(token_type));
|
||||
}
|
||||
|
||||
PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u)",
|
||||
dcf,
|
||||
data_buf[5],
|
||||
data_buf[6],
|
||||
token_type,
|
||||
(data_buf[5]&0x80)>>7
|
||||
);
|
||||
}
|
||||
|
||||
// Makes no sence to show this on blank media...
|
||||
if(dcf != 0xFFFF) {
|
||||
|
||||
if(bIsSegmented) {
|
||||
PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, SSC=%02x",
|
||||
data_buf[7]&0x0f,
|
||||
(data_buf[7]&0x70)>>4,
|
||||
(data_buf[7]&0x80)>>7,
|
||||
data_buf[7],
|
||||
data_buf[8]
|
||||
);
|
||||
}
|
||||
|
||||
// Header area is only available on IM-S cards, on master tokens this data is the master token data itself
|
||||
if(bIsSegmented || dcf > 60000) {
|
||||
if(dcf > 60000) {
|
||||
PrintAndLog("Master token data");
|
||||
PrintAndLog("%s", sprint_hex(data_buf+8, 14));
|
||||
} else {
|
||||
PrintAndLog("Remaining Header Area");
|
||||
PrintAndLog("%s", sprint_hex(data_buf+9, 13));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
uint8_t segCrcBytes[8] = {0x00};
|
||||
uint32_t segCalcCRC = 0;
|
||||
uint32_t segCRC = 0;
|
||||
|
||||
// see if user area is xored or just zeros.
|
||||
int numOfZeros = 0;
|
||||
for (int index=22; index < 256; ++index){
|
||||
if ( data_buf[index] == 0x00 )
|
||||
++numOfZeros;
|
||||
}
|
||||
// if possible zeros is less then 60%, lets assume data is xored
|
||||
// 256 - 22 (header) = 234
|
||||
// 1024 - 22 (header) = 1002
|
||||
int isXored = (numOfZeros*100/stamp_len) < 50;
|
||||
PrintAndLog("is data xored? %d ( %d %)", isXored, (numOfZeros*100/stamp_len));
|
||||
|
||||
print_hex_break( data_buf, 33, 16);
|
||||
|
||||
return 0;
|
||||
// Data card?
|
||||
if(dcf <= 60000) {
|
||||
|
||||
PrintAndLog("\nADF: User Area");
|
||||
PrintAndLog("------------------------------------------------------");
|
||||
|
||||
if(bIsSegmented) {
|
||||
|
||||
// Data start point on segmented cards
|
||||
i = 22;
|
||||
// 64 potential segements
|
||||
// how to detect there is no segments?!?
|
||||
for ( segmentNum=0; segmentNum<64; segmentNum++ ) {
|
||||
|
||||
// decode segments
|
||||
for (segmentNum=1; segmentNum < 128; segmentNum++ )
|
||||
{
|
||||
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;
|
||||
|
||||
|
|
@ -198,11 +243,10 @@ int CmdLegicDecode(const char *Cmd) {
|
|||
PrintAndLog("WRC protected area: (I %d | K %d| WRC %d)", i, k, wrc);
|
||||
PrintAndLog("\nrow | data");
|
||||
PrintAndLog("-----+------------------------------------------------");
|
||||
// de-xor? if not zero, assume it needs xoring.
|
||||
if ( isXored) {
|
||||
for ( k=i; k < wrc; ++k)
|
||||
|
||||
for ( k=i; k < (i+wrc); ++k)
|
||||
data_buf[k] ^= crc;
|
||||
}
|
||||
|
||||
print_hex_break( data_buf+i, wrc, 16);
|
||||
|
||||
i += wrc;
|
||||
|
|
@ -213,16 +257,14 @@ int CmdLegicDecode(const char *Cmd) {
|
|||
PrintAndLog("\nrow | data");
|
||||
PrintAndLog("-----+------------------------------------------------");
|
||||
|
||||
if (isXored) {
|
||||
for (k=i; k < wrp_len; ++k)
|
||||
for (k=i; k < (i+wrp_len); ++k)
|
||||
data_buf[k] ^= crc;
|
||||
}
|
||||
|
||||
print_hex_break( data_buf+i, wrp_len, 16);
|
||||
|
||||
i += wrp_len;
|
||||
|
||||
// does this one work?
|
||||
// does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...)
|
||||
if( wrp_len == 8 )
|
||||
PrintAndLog("Card ID: %2X%02X%02X", data_buf[i-4]^crc, data_buf[i-3]^crc, data_buf[i-2]^crc);
|
||||
}
|
||||
|
|
@ -230,10 +272,9 @@ int CmdLegicDecode(const char *Cmd) {
|
|||
PrintAndLog("Remaining segment payload: (I %d | K %d | Remain LEN %d)", i, k, remain_seg_payload_len);
|
||||
PrintAndLog("\nrow | data");
|
||||
PrintAndLog("-----+------------------------------------------------");
|
||||
if ( isXored ) {
|
||||
for ( k=i; k < remain_seg_payload_len; ++k)
|
||||
|
||||
for ( k=i; k < (i+remain_seg_payload_len); ++k)
|
||||
data_buf[k] ^= crc;
|
||||
}
|
||||
|
||||
print_hex_break( data_buf+i, remain_seg_payload_len, 16);
|
||||
|
||||
|
|
@ -245,6 +286,56 @@ int CmdLegicDecode(const char *Cmd) {
|
|||
if (segment_flag & 0x8) return 0;
|
||||
|
||||
} // end for loop
|
||||
|
||||
} else {
|
||||
|
||||
// Data start point on unsegmented cards
|
||||
i = 8;
|
||||
|
||||
wrp = data_buf[7] & 0x0F;
|
||||
wrc = (data_buf[7] & 0x07) >> 4;
|
||||
|
||||
bool hasWRC = (wrc > 0);
|
||||
bool hasWRP = (wrp > wrc);
|
||||
int wrp_len = (wrp - wrc);
|
||||
int remain_seg_payload_len = (1024 - 22 - wrp); // Any chance to get physical card size here!?
|
||||
|
||||
PrintAndLog("Unsegmented card - WRP: %02u, WRC: %02u, RD: %01u",
|
||||
wrp,
|
||||
wrc,
|
||||
(data_buf[7] & 0x80) >> 7
|
||||
);
|
||||
|
||||
if ( hasWRC ) {
|
||||
PrintAndLog("WRC protected area: (I %d | WRC %d)", i, wrc);
|
||||
PrintAndLog("\nrow | data");
|
||||
PrintAndLog("-----+------------------------------------------------");
|
||||
print_hex_break( data_buf+i, wrc, 16);
|
||||
i += wrc;
|
||||
}
|
||||
|
||||
if ( hasWRP ) {
|
||||
PrintAndLog("Remaining write protected area: (I %d | WRC %d | WRP %d | WRP_LEN %d)", i, wrc, wrp, wrp_len);
|
||||
PrintAndLog("\nrow | data");
|
||||
PrintAndLog("-----+------------------------------------------------");
|
||||
print_hex_break( data_buf+i, wrp_len, 16);
|
||||
i += wrp_len;
|
||||
|
||||
// does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...)
|
||||
if( wrp_len == 8 )
|
||||
PrintAndLog("Card ID: %2X%02X%02X", data_buf[i-4], data_buf[i-3], data_buf[i-2]);
|
||||
}
|
||||
|
||||
PrintAndLog("Remaining segment payload: (I %d | Remain LEN %d)", i, remain_seg_payload_len);
|
||||
PrintAndLog("\nrow | data");
|
||||
PrintAndLog("-----+------------------------------------------------");
|
||||
print_hex_break( data_buf+i, remain_seg_payload_len, 16);
|
||||
i += remain_seg_payload_len;
|
||||
|
||||
PrintAndLog("-----+------------------------------------------------\n");
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -417,8 +508,37 @@ int CmdLegicRfWrite(const char *Cmd) {
|
|||
return 0;
|
||||
}
|
||||
|
||||
//TODO: write a help text (iceman)
|
||||
int CmdLegicRfRawWrite(const char *Cmd) {
|
||||
char answer;
|
||||
UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {0,0,0} };
|
||||
int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]);
|
||||
if(res != 2) {
|
||||
PrintAndLog("Please specify the offset and value as two hex strings");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (c.arg[0] == 0x05 || c.arg[0] == 0x06) {
|
||||
PrintAndLog("############# DANGER !! #############");
|
||||
PrintAndLog("# changing the DCF is irreversible #");
|
||||
PrintAndLog("#####################################");
|
||||
PrintAndLog("do youe really want to continue? y(es) n(o)");
|
||||
scanf(" %c", &answer);
|
||||
if (answer == 'y' || answer == 'Y') {
|
||||
SendCommand(&c);
|
||||
return 0;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
clearCommandBuffer();
|
||||
SendCommand(&c);
|
||||
return 0;
|
||||
}
|
||||
|
||||
//TODO: write a help text (iceman)
|
||||
int CmdLegicRfFill(const char *Cmd) {
|
||||
UsbCommand cmd = {CMD_WRITER_LEGIC_RF};
|
||||
UsbCommand cmd = {CMD_WRITER_LEGIC_RF, {0,0,0} };
|
||||
int res = sscanf(Cmd, " 0x%"llx" 0x%"llx" 0x%"llx, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]);
|
||||
if(res != 3) {
|
||||
PrintAndLog("Please specify the offset, length and value as two hex strings");
|
||||
|
|
@ -427,14 +547,14 @@ int CmdLegicRfFill(const char *Cmd) {
|
|||
|
||||
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];
|
||||
}
|
||||
|
||||
memcpy(c.d.asBytes, cmd.arg[2], 48);
|
||||
|
||||
for(i = 0; i < 22; i++) {
|
||||
c.arg[0] = i*48;
|
||||
|
||||
clearCommandBuffer();
|
||||
SendCommand(&c);
|
||||
WaitForResponse(CMD_ACK,NULL);
|
||||
WaitForResponse(CMD_ACK, NULL);
|
||||
}
|
||||
clearCommandBuffer();
|
||||
SendCommand(&cmd);
|
||||
|
|
@ -443,20 +563,64 @@ int CmdLegicRfFill(const char *Cmd) {
|
|||
|
||||
int CmdLegicCalcCrc8(const char *Cmd){
|
||||
|
||||
int len = strlen(Cmd);
|
||||
if ( len & 1 ) return usage_legic_calccrc8();
|
||||
uint8_t *data;
|
||||
uint8_t cmdp = 0, uidcrc = 0, type=0;
|
||||
bool errors = false;
|
||||
int len = 0;
|
||||
|
||||
// add 1 for null terminator.
|
||||
uint8_t *data = malloc(len+1);
|
||||
if ( data == NULL ) return 1;
|
||||
|
||||
if (param_gethex(Cmd, 0, data, len )) {
|
||||
free(data);
|
||||
return usage_legic_calccrc8();
|
||||
while(param_getchar(Cmd, cmdp) != 0x00) {
|
||||
switch(param_getchar(Cmd, cmdp)) {
|
||||
case 'b':
|
||||
case 'B':
|
||||
data = malloc(len);
|
||||
if ( data == NULL ) {
|
||||
PrintAndLog("Can't allocate memory. exiting");
|
||||
errors = true;
|
||||
break;
|
||||
}
|
||||
param_gethex_ex(Cmd, cmdp+1, data, &len);
|
||||
// if odd symbols, (hexbyte must be two symbols)
|
||||
if ( len & 1 ) errors = true;
|
||||
|
||||
len >>= 1;
|
||||
cmdp += 2;
|
||||
break;
|
||||
case 'u':
|
||||
case 'U':
|
||||
uidcrc = param_get8ex(Cmd, cmdp+1, 0, 16);
|
||||
cmdp += 2;
|
||||
break;
|
||||
case 'c':
|
||||
case 'C':
|
||||
type = param_get8ex(Cmd, cmdp+1, 0, 10);
|
||||
cmdp += 2;
|
||||
break;
|
||||
case 'h':
|
||||
case 'H':
|
||||
errors = true;
|
||||
break;
|
||||
default:
|
||||
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
|
||||
errors = true;
|
||||
break;
|
||||
}
|
||||
if (errors) break;
|
||||
}
|
||||
//Validations
|
||||
if (errors){
|
||||
if (data != NULL) free(data);
|
||||
return usage_legic_calccrc8();
|
||||
}
|
||||
|
||||
switch (type){
|
||||
case 16:
|
||||
PrintAndLog("LEGIC CRC16: %X", CRC16Legic(data, len, uidcrc));
|
||||
break;
|
||||
default:
|
||||
PrintAndLog("LEGIC CRC8: %X", CRC8Legic(data, len) );
|
||||
break;
|
||||
}
|
||||
|
||||
uint32_t checksum = CRC8Legic(data, len/2);
|
||||
PrintAndLog("Bytes: %s || CRC8: %X", sprint_hex(data, len/2), checksum );
|
||||
free(data);
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -469,6 +633,7 @@ static command_t CommandTable[] = {
|
|||
{"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)"},
|
||||
{"writeRaw",CmdLegicRfRawWrite, 0, "<address> <value> -- Write direct to address"},
|
||||
{"fill", CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
|
||||
{"crc8", CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"},
|
||||
{NULL, NULL, 0, NULL}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue