static int CmdHelp(const char *Cmd);
-#define SESSION_IV 0x55
#define MAX_LENGTH 1024
int usage_legic_calccrc8(void){
PrintAndLog("Usage: hf legic read [h] <offset> <length> <IV>");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
- PrintAndLog(" <offset> : offset in data array to start download from");
- PrintAndLog(" <length> : number of bytes to download");
- PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)");
+ PrintAndLog(" <offset> : offset in data array to start download from (hex)");
+ PrintAndLog(" <length> : number of bytes to read (hex)");
+ PrintAndLog(" <IV> : (optional) Initialization vector to use (hex, odd and 7bits)");
PrintAndLog("");
PrintAndLog("Samples:");
- PrintAndLog(" hf legic read");
- PrintAndLog(" hf legic read 10 4");
+ PrintAndLog(" hf legic read 0 21 - reads from byte[0] 21 bytes(system header)");
+ PrintAndLog(" hf legic read 0 4 55 - reads from byte[0] 4 bytes with IV 0x55");
+ PrintAndLog(" hf legic read 0 100 55 - reads 256bytes with IV 0x55");
return 0;
}
int usage_legic_sim(void){
PrintAndLog("Usage: hf legic write [h] <offset> <length> <IV>");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
- PrintAndLog(" <offset> : offset in data array to start writing from");
- PrintAndLog(" <length> : number of bytes to write");
+ PrintAndLog(" <offset> : offset in data array to start writing from (hex)");
+ PrintAndLog(" <length> : number of bytes to write (hex)");
PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)");
PrintAndLog("");
PrintAndLog("Samples:");
- PrintAndLog(" hf legic write");
- PrintAndLog(" hf legic write 10 4");
+ PrintAndLog(" hf legic write 10 4 - writes 0x4 to byte[0x10]");
return 0;
}
int usage_legic_rawwrite(void){
- PrintAndLog("Write raw data direct to a specific address on legic tag.");
- PrintAndLog("Usage: hf legic writeraw [h] <address> <value> <IV>");
+ PrintAndLog("Write raw data direct to a specific offset on legic tag.");
+ PrintAndLog("Usage: hf legic writeraw [h] <offset> <value> <IV>");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
- PrintAndLog(" <address> : address to write to");
- PrintAndLog(" <value> : value to write");
- PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)");
+ PrintAndLog(" <offset> : offset to write to (hex)");
+ PrintAndLog(" <value> : value (hex)");
+ PrintAndLog(" <IV> : (optional) Initialization vector to use (hex, odd and 7bits)");
PrintAndLog("");
PrintAndLog("Samples:");
- PrintAndLog(" hf legic writeraw");
- PrintAndLog(" hf legic writeraw 10 4");
+ PrintAndLog(" hf legic writeraw 10 4 - writes 0x4 to byte[0x10]");
return 0;
}
int usage_legic_fill(void){
PrintAndLog("Missing help text.");
return 0;
}
-
+int usage_legic_info(void){
+ PrintAndLog("Read info from a legic tag.");
+ PrintAndLog("Usage: hf legic info [h]");
+ PrintAndLog("Options:");
+ PrintAndLog(" h : this help");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic info");
+ return 0;
+}
/*
* Output BigBuf and deobfuscate LEGIC RF tag data.
* This is based on information given in the talk held
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 {
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
);
}
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]
);
}
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));
}
}
}
// 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);
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"
);
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;
}
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);
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;
// 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);
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;
}
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");
int CmdLegicRFRead(const char *Cmd) {
// params:
- // offset in data
- // number of bytes.
+ // offset in data memory
+ // number of bytes to read
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_read();
sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
// OUT-OF-BOUNDS check
- if(len + offset > MAX_LENGTH) len = MAX_LENGTH - offset;
+ if ( len + offset > MAX_LENGTH ) {
+ len = MAX_LENGTH - offset;
+ PrintAndLog("Out-of-bound, shorten len to %d (0x%02X)", len);
+ }
if ( (IV & 0x7F) != IV ){
IV &= 0x7F;
PrintAndLog("Truncating IV to 7bits");
}
+
if ( (IV & 1) == 0 ){
- IV |= 0x01; // IV must be odd
+ IV |= 0x01;
PrintAndLog("LSB of IV must be SET");
}
- PrintAndLog("Current IV: 0x%02x", IV);
-
- // get some prng bytes from
- uint8_t temp[12];
- legic_prng_init(IV);
- for ( uint8_t j = 0; j < sizeof(temp); ++j)
- temp[j] = legic_prng_get_bits(8);
-
- PrintAndLog("PRNG: %s", sprint_hex(temp, sizeof(temp)));
UsbCommand c = {CMD_READER_LEGIC_RF, {offset, len, IV}};
clearCommandBuffer();
SendCommand(&c);
UsbCommand resp;
- if (WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
+ if (WaitForResponseTimeout(CMD_ACK, &resp, 3000)) {
uint8_t isOK = resp.arg[0] & 0xFF;
- uint16_t len = resp.arg[1] & 0x3FF;
+ uint16_t readlen = resp.arg[1];
if ( isOK ) {
- PrintAndLog("use 'hf legic decode'");
- }
- uint8_t *data = resp.d.asBytes;
- PrintAndLog("\nData |");
+
+ uint8_t *data = malloc(readlen);
+ if ( !data ){
+ PrintAndLog("Cannot allocate memory");
+ return 2;
+ }
+
+ if ( readlen != len )
+ PrintAndLog("Fail, only managed to read 0x%02X bytes", readlen);
+
+ // copy data from device
+ GetEMLFromBigBuf(data, readlen, 0);
+ if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)){
+ PrintAndLog("Command execute timeout");
+ if ( data )
+ free(data);
+ return 1;
+ }
+
+ PrintAndLog("\nData");
PrintAndLog("-----------------------------");
- PrintAndLog(" %s|\n", sprint_hex(data, len));
- // }
+ print_hex_break( data, readlen, 32);
+ } else {
+ PrintAndLog("failed reading tag");
+ }
} else {
PrintAndLog("command execution time out");
return 1;
uint32_t offset = 0, len = 0, IV = 0;
- UsbCommand c = {CMD_WRITER_LEGIC_RF, {0,0,0}};
int res = sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
if(res < 2) {
PrintAndLog("Please specify the offset and length as two hex strings and, optionally, the IV also as an hex string");
}
// OUT-OF-BOUNDS check
- if(len + offset > MAX_LENGTH) len = MAX_LENGTH - offset;
-
+ if ( len + offset > MAX_LENGTH ) {
+ len = MAX_LENGTH - offset;
+ PrintAndLog("Out-of-bound, shorten len to %d (0x%02X)", len);
+ }
if ( (IV & 0x7F) != IV ){
IV &= 0x7F;
PrintAndLog("Truncating IV to 7bits");
PrintAndLog("LSB of IV must be SET");
}
- PrintAndLog("Current IV: 0x%02x", IV);
-
- c.arg[0] = offset;
- c.arg[1] = len;
- c.arg[2] = IV;
-
+ UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}};
clearCommandBuffer();
SendCommand(&c);
+ UsbCommand resp;
+ if (WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ if ( isOK ) {
+ } else {
+ PrintAndLog("failed writig tag");
+ }
+ } else {
+ PrintAndLog("command execution time out");
+ return 1;
+ }
+
return 0;
}
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rawwrite();
- uint32_t address = 0, data = 0, IV = 0;
+ uint32_t offset = 0, data = 0, IV = 0;
char answer;
- UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {0,0,0} };
- int res = sscanf(Cmd, "%x %x %x", &address, &data, &IV);
+ int res = sscanf(Cmd, "%x %x %x", &offset, &data, &IV);
if(res < 2)
return usage_legic_rawwrite();
-
+
// OUT-OF-BOUNDS check
- if(address > MAX_LENGTH)
- return usage_legic_rawwrite();
+ if ( offset > MAX_LENGTH ) {
+ PrintAndLog("Out-of-bound, offset");
+ return 1;
+ }
if ( (IV & 0x7F) != IV ){
IV &= 0x7F;
IV |= 0x01; // IV must be odd
PrintAndLog("LSB of IV must be SET");
}
- PrintAndLog("Current IV: 0x%02x", IV);
- c.arg[0] = address;
- c.arg[1] = data;
- c.arg[2] = IV;
+ UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {offset, data, IV} };
if (c.arg[0] == 0x05 || c.arg[0] == 0x06) {
PrintAndLog("############# DANGER !! #############");
crc_update(&crc, 1, 1); /* CMD_READ */
crc_update(&crc, cmd[0], 8);
crc_update(&crc, cmd[1], 8);
- printf("crc4 %X\n", crc_finish(&crc), 4 ) ;
+ printf("crc4 %X\n", crc_finish(&crc) ) ;
printf("---- old ---\n");
crc_update2(&crc, 1, 1); /* CMD_READ */
crc_update2(&crc, 1, 1); /* CMD_READ */
crc_update2(&crc, cmd[0], 8);
crc_update2(&crc, cmd[1], 8);
- printf("crc4 %X\n", crc_finish(&crc), 4 ) ;
+ printf("crc4 %X\n", crc_finish(&crc) ) ;
}
int CmdLegicCalcCrc8(const char *Cmd){
return 0;
}
+int HFLegicInfo(const char *Cmd, bool verbose) {
+
+ char cmdp = param_getchar(Cmd, 0);
+ if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_info();
+
+ UsbCommand c = {CMD_LEGIC_INFO, {0,0,0}};
+ clearCommandBuffer();
+ SendCommand(&c);
+ UsbCommand resp;
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 500)) {
+ if ( verbose ) PrintAndLog("command execution time out");
+ return 1;
+ }
+
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ if ( !isOK ) {
+ if ( verbose ) PrintAndLog("legic card select failed");
+ return 1;
+ }
+
+ legic_card_select_t card;
+ memcpy(&card, (legic_card_select_t *)resp.d.asBytes, sizeof(legic_card_select_t));
+
+ PrintAndLog(" UID : %s", sprint_hex(card.uid, sizeof(card.uid)));
+ switch(card.cardsize) {
+ case 22:
+ case 256:
+ case 1024:
+ PrintAndLog(" TYPE : MIM%d card (%d bytes)", card.cardsize, card.cardsize); break;
+ default: {
+ PrintAndLog("Unknown card format: %d", card.cardsize);
+ return 1;
+ }
+ }
+ return 0;
+}
+int CmdLegicInfo(const char *Cmd){
+ return HFLegicInfo(Cmd, TRUE);
+}
+
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)"},
{"writeraw",CmdLegicRfRawWrite, 0, "<address> <value> <iv> -- 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"},
- {"info", CmdLegicCalcCrc8, 1, "Information"},
+ {"info", CmdLegicInfo, 1, "Information"},
{NULL, NULL, 0, NULL}
};
projects / proxmark3-svn / blobdiff