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CHG: revert legiccrc8 to old algo.

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CHG: "hf legic decode" now loads EML memory
CHG: legic timings is better.
This commit is contained in:
iceman1001 2016-10-04 00:07:07 +02:00
parent 0b0b182fe2
commit 77a689dbeb
3 changed files with 68 additions and 68 deletions
armsrc
legicrf.c
client
cmdhflegic.c
common
crc.c

2
armsrc/legicrf.c

@ -320,7 +320,7 @@ static uint32_t setup_phase_reader(uint8_t iv) {
// Switch on carrier and let the tag charge for 1ms
HIGH(GPIO_SSC_DOUT);
WaitUS(2000);
WaitUS(5000);
ResetTicks();

132
client/cmdhflegic.c

@ -109,86 +109,86 @@ int CmdLegicDecode(const char *Cmd) {
int i = 0, k = 0, segmentNum = 0, segment_len = 0, segment_flag = 0;
int crc = 0, wrp = 0, wrc = 0;
uint8_t stamp_len = 0;
uint8_t data_buf[1024]; // receiver buffer
uint8_t data[1024]; // receiver buffer
char token_type[5] = {0,0,0,0,0};
int dcf = 0;
int bIsSegmented = 0;
// copy data from proxmark into buffer
GetFromBigBuf(data_buf,sizeof(data_buf),0);
// copy data from device
GetEMLFromBigBuf(data, sizeof(data), 0);
if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
PrintAndLog("Command execute timeout");
return 1;
}
// Output CDF System area (9 bytes) plus remaining header area (12 bytes)
crc = data_buf[4];
uint32_t calc_crc = CRC8Legic(data_buf, 4);
crc = data[4];
uint32_t calc_crc = CRC8Legic(data, 4);
PrintAndLog("\nCDF: System Area");
PrintAndLog("------------------------------------------------------");
PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s",
data_buf[0],
data_buf[1],
data_buf[2],
data_buf[3],
data_buf[4],
(calc_crc == crc) ? "OK":"Fail"
data[0],
data[1],
data[2],
data[3],
data[4],
(calc_crc == crc) ? "OK":"Fail"
);
token_type[0] = 0;
dcf = ((int)data_buf[6] << 8) | (int)data_buf[5];
dcf = ((int)data[6] << 8) | (int)data[5];
// New unwritten media?
if(dcf == 0xFFFF) {
PrintAndLog("DCF: %d (%02x %02x), Token Type=NM (New Media)",
dcf,
data_buf[5],
data_buf[6]
data[5],
data[6]
);
} else if(dcf > 60000) { // Master token?
int fl = 0;
if(data_buf[6] == 0xec) {
if(data[6] == 0xec) {
strncpy(token_type, "XAM", sizeof(token_type));
fl = 1;
stamp_len = 0x0c - (data_buf[5] >> 4);
stamp_len = 0x0c - (data[5] >> 4);
} else {
switch (data_buf[5] & 0x7f) {
switch (data[5] & 0x7f) {
case 0x00 ... 0x2f:
strncpy(token_type, "IAM", sizeof(token_type));
fl = (0x2f - (data_buf[5] & 0x7f)) + 1;
fl = (0x2f - (data[5] & 0x7f)) + 1;
break;
case 0x30 ... 0x6f:
strncpy(token_type, "SAM", sizeof(token_type));
fl = (0x6f - (data_buf[5] & 0x7f)) + 1;
fl = (0x6f - (data[5] & 0x7f)) + 1;
break;
case 0x70 ... 0x7f:
strncpy(token_type, "GAM", sizeof(token_type));
fl = (0x7f - (data_buf[5] & 0x7f)) + 1;
fl = (0x7f - (data[5] & 0x7f)) + 1;
break;
}
stamp_len = 0xfc - data_buf[6];
stamp_len = 0xfc - data[6];
}
PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u), OL=%02u, FL=%02u",
dcf,
data_buf[5],
data_buf[6],
data[5],
data[6],
token_type,
(data_buf[5] & 0x80 )>> 7,
(data[5] & 0x80 )>> 7,
stamp_len,
fl
);
} else { // Is IM(-S) type of card...
if(data_buf[7] == 0x9F && data_buf[8] == 0xFF) {
if(data[7] == 0x9F && data[8] == 0xFF) {
bIsSegmented = 1;
strncpy(token_type, "IM-S", sizeof(token_type));
} else {
@ -197,10 +197,10 @@ int CmdLegicDecode(const char *Cmd) {
PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u)",
dcf,
data_buf[5],
data_buf[6],
data[5],
data[6],
token_type,
(data_buf[5]&0x80) >> 7
(data[5]&0x80) >> 7
);
}
@ -209,10 +209,10 @@ int CmdLegicDecode(const char *Cmd) {
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[8]
data[7] & 0x0f,
(data[7] & 0x70) >> 4,
(data[7] & 0x80) >> 7,
data[8]
);
}
@ -220,10 +220,10 @@ int CmdLegicDecode(const char *Cmd) {
if(bIsSegmented || dcf > 60000) {
if(dcf > 60000) {
PrintAndLog("Master token data");
PrintAndLog("%s", sprint_hex(data_buf+8, 14));
PrintAndLog("%s", sprint_hex(data+8, 14));
} else {
PrintAndLog("Remaining Header Area");
PrintAndLog("%s", sprint_hex(data_buf+9, 13));
PrintAndLog("%s", sprint_hex(data+9, 13));
}
}
}
@ -246,10 +246,10 @@ int CmdLegicDecode(const char *Cmd) {
// 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;
segment_len = ((data[i+1] ^ crc) & 0x0f) * 256 + (data[i] ^ crc);
segment_flag = ((data[i+1] ^ crc) & 0xf0) >> 4;
wrp = (data[i+2] ^ crc);
wrc = ((data[i+3] ^ crc) & 0x70) >> 4;
bool hasWRC = (wrc > 0);
bool hasWRP = (wrp > wrc);
@ -257,31 +257,31 @@ int CmdLegicDecode(const char *Cmd) {
int remain_seg_payload_len = (segment_len - wrp - 5);
// validate segment-crc
segCrcBytes[0]=data_buf[0]; //uid0
segCrcBytes[1]=data_buf[1]; //uid1
segCrcBytes[2]=data_buf[2]; //uid2
segCrcBytes[3]=data_buf[3]; //uid3
segCrcBytes[4]=(data_buf[i] ^ crc); //hdr0
segCrcBytes[5]=(data_buf[i+1] ^ crc); //hdr1
segCrcBytes[6]=(data_buf[i+2] ^ crc); //hdr2
segCrcBytes[7]=(data_buf[i+3] ^ crc); //hdr3
segCrcBytes[0]=data[0]; //uid0
segCrcBytes[1]=data[1]; //uid1
segCrcBytes[2]=data[2]; //uid2
segCrcBytes[3]=data[3]; //uid3
segCrcBytes[4]=(data[i] ^ crc); //hdr0
segCrcBytes[5]=(data[i+1] ^ crc); //hdr1
segCrcBytes[6]=(data[i+2] ^ crc); //hdr2
segCrcBytes[7]=(data[i+3] ^ crc); //hdr3
segCalcCRC = CRC8Legic(segCrcBytes, 8);
segCRC = data_buf[i+4] ^ crc;
segCRC = data[i+4] ^ crc;
PrintAndLog("Segment %02u \nraw header | 0x%02X 0x%02X 0x%02X 0x%02X \nSegment len: %u, Flag: 0x%X (valid:%01u, last:%01u), WRP: %02u, WRC: %02u, RD: %01u, CRC: 0x%02X (%s)",
segmentNum,
data_buf[i] ^ crc,
data_buf[i+1] ^ crc,
data_buf[i+2] ^ crc,
data_buf[i+3] ^ crc,
data[i] ^ crc,
data[i+1] ^ crc,
data[i+2] ^ crc,
data[i+3] ^ crc,
segment_len,
segment_flag,
(segment_flag & 0x4) >> 2,
(segment_flag & 0x8) >> 3,
wrp,
wrc,
((data_buf[i+3]^crc) & 0x80) >> 7,
((data[i+3]^crc) & 0x80) >> 7,
segCRC,
( segCRC == segCalcCRC ) ? "OK" : "fail"
);
@ -294,9 +294,9 @@ int CmdLegicDecode(const char *Cmd) {
PrintAndLog("-----+------------------------------------------------");
for ( k=i; k < (i + wrc); ++k)
data_buf[k] ^= crc;
data[k] ^= crc;
print_hex_break( data_buf+i, wrc, 16);
print_hex_break( data+i, wrc, 16);
i += wrc;
}
@ -307,15 +307,15 @@ int CmdLegicDecode(const char *Cmd) {
PrintAndLog("-----+------------------------------------------------");
for (k=i; k < (i+wrp_len); ++k)
data_buf[k] ^= crc;
data[k] ^= crc;
print_hex_break( data_buf+i, wrp_len, 16);
print_hex_break( data+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]^crc, data_buf[i-3]^crc, data_buf[i-2]^crc);
PrintAndLog("Card ID: %2X%02X%02X", data[i-4]^crc, data[i-3]^crc, data[i-2]^crc);
}
PrintAndLog("Remaining segment payload: (I %d | K %d | Remain LEN %d)", i, k, remain_seg_payload_len);
@ -323,9 +323,9 @@ int CmdLegicDecode(const char *Cmd) {
PrintAndLog("-----+------------------------------------------------");
for ( k=i; k < (i+remain_seg_payload_len); ++k)
data_buf[k] ^= crc;
data[k] ^= crc;
print_hex_break( data_buf+i, remain_seg_payload_len, 16);
print_hex_break( data+i, remain_seg_payload_len, 16);
i += remain_seg_payload_len;
@ -341,8 +341,8 @@ int CmdLegicDecode(const char *Cmd) {
// Data start point on unsegmented cards
i = 8;
wrp = data_buf[7] & 0x0F;
wrc = (data_buf[7] & 0x70) >> 4;
wrp = data[7] & 0x0F;
wrc = (data[7] & 0x70) >> 4;
bool hasWRC = (wrc > 0);
bool hasWRP = (wrp > wrc);
@ -352,14 +352,14 @@ int CmdLegicDecode(const char *Cmd) {
PrintAndLog("Unsegmented card - WRP: %02u, WRC: %02u, RD: %01u",
wrp,
wrc,
(data_buf[7] & 0x80) >> 7
(data[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);
print_hex_break( data+i, wrc, 16);
i += wrc;
}
@ -367,18 +367,18 @@ int CmdLegicDecode(const char *Cmd) {
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);
print_hex_break( data + 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("Card ID: %2X%02X%02X", data[i-4], data[i-3], data[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);
print_hex_break( data + i, remain_seg_payload_len, 16);
i += remain_seg_payload_len;
PrintAndLog("-----+------------------------------------------------\n");

2
common/crc.c

@ -115,7 +115,7 @@ uint32_t CRC8Legic(uint8_t *buff, size_t size) {
crc_t crc;
crc_init_ref(&crc, 8, 0x63, 0x55, 0, TRUE, TRUE);
for ( int i = 0; i < size; ++i)
crc_update(&crc, buff[i], 8);
crc_update2(&crc, buff[i], 8);
return reflect(crc_finish(&crc), 8);
}