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77e1bab94aa5834882b3e48013035482296df9c9
proxmark3/client/cmdhflegic.c
iceman1001 77e1bab94a REM: "hf legic writeraw" has been removed. 
FIX: "hf legic eload" uploads now correct to device mem.
2016-10-06 19:34:53 +02:00

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//-----------------------------------------------------------------------------
// 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 "cmdhflegic.h"
static int CmdHelp(const char *Cmd);
#define MAX_LENGTH 1024
int usage_legic_calccrc8(void){
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 [h] b <hexbytes> u <uidcrc> c <crc type>");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
PrintAndLog(" b <hexbytes> : hex bytes");
PrintAndLog(" u <uidcrc> : MCC hexbyte");
PrintAndLog(" c <crc type> : 8|16 bit crc size");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic crc8 b deadbeef1122");
PrintAndLog(" hf legic crc8 b deadbeef1122 u 9A c 16");
return 0;
}
int usage_legic_load(void){
PrintAndLog("It loads datasamples from the file `filename` to device memory");
PrintAndLog("Usage: hf legic load [h] <file name>");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
PrintAndLog(" <filename> : Name of file to load");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic load filename");
return 0;
}
int usage_legic_rdmem(void){
PrintAndLog("Read data from a legic tag.");
PrintAndLog("Usage: hf legic rdmem [h] <offset> <length> <IV>");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
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 rdmem 0 21 - reads from byte[0] 21 bytes(system header)");
PrintAndLog(" hf legic rdmem 0 4 55 - reads from byte[0] 4 bytes with IV 0x55");
PrintAndLog(" hf legic rdmem 0 100 55 - reads 256bytes with IV 0x55");
return 0;
}
int usage_legic_sim(void){
PrintAndLog("Missing help text.");
return 0;
}
int usage_legic_write(void){
PrintAndLog(" Write sample buffer to a legic tag. (use after load or read)");
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 (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 10 4 - writes 0x4 to byte[0x10]");
return 0;
}
int usage_legic_reader(void){
PrintAndLog("Read UID and type information from a legic tag.");
PrintAndLog("Usage: hf legic reader [h]");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic reader");
return 0;
}
int usage_legic_info(void){
PrintAndLog("Reads information from a legic prime tag.");
PrintAndLog("Shows systemarea, user areas etc");
PrintAndLog("Usage: hf legic info [h]");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic info");
return 0;
}
int usage_legic_dump(void){
PrintAndLog("Reads all pages from LEGIC MIM22, MIM256, MIM1024");
PrintAndLog("and saves binary dump into the file `filename.bin` or `cardUID.bin`");
PrintAndLog("It autodetects card type.\n");
PrintAndLog("Usage: hf legic dump [h] o <filename w/o .bin>");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
PrintAndLog(" n <FN> : filename w/o .bin to save the dump as");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic dump");
PrintAndLog(" hf legic dump o myfile");
return 0;
}
int usage_legic_eload(void){
PrintAndLog("It loads binary dump from the file `filename.bin`");
PrintAndLog("Usage: hf legic eload [h] [card memory] <file name w/o `.bin`>");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
PrintAndLog(" [card memory] : 0 = MIM22");
PrintAndLog(" : 1 = MIM256 (default)");
PrintAndLog(" : 2 = MIM1024");
PrintAndLog(" <filename> : filename w/o .bin to load");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic eload filename");
PrintAndLog(" hf legic eload 2 filename");
return 0;
}
int usage_legic_esave(void){
PrintAndLog("It saves binary dump into the file `filename.bin` or `cardID.bin`");
PrintAndLog(" Usage: hf legic esave [h] [card memory] [file name w/o `.bin`]");
PrintAndLog("Options:");
PrintAndLog(" h : this help");
PrintAndLog(" [card memory] : 0 = MIM22");
PrintAndLog(" : 1 = MIM256 (default)");
PrintAndLog(" : 2 = MIM1024");
PrintAndLog(" <filename> : filename w/o .bin to load");
PrintAndLog("");
PrintAndLog("Samples:");
PrintAndLog(" hf legic esave ");
PrintAndLog(" hf legic esave 2");
PrintAndLog(" hf legic esave 2 filename");
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 CmdLegicInfo(const char *Cmd) {
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_info();
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[1024]; // receiver buffer
char token_type[5] = {0,0,0,0,0};
int dcf = 0;
int bIsSegmented = 0;
CmdLegicRdmem("0 22 55");
// 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[4];
uint32_t calc_crc = CRC8Legic(data, 4);
PrintAndLog("\nCDF: System Area");
PrintAndLog("------------------------------------------------------");
PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s",
data[0],
data[1],
data[2],
data[3],
data[4],
(calc_crc == crc) ? "OK":"Fail"
);
// MCD = Manufacturer ID (should be list meaning something?)
token_type[0] = 0;
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[5],
data[6]
);
} else if(dcf > 60000) { // Master token?
int fl = 0;
if(data[6] == 0xec) {
strncpy(token_type, "XAM", sizeof(token_type));
fl = 1;
stamp_len = 0x0c - (data[5] >> 4);
} else {
switch (data[5] & 0x7f) {
case 0x00 ... 0x2f:
strncpy(token_type, "IAM", sizeof(token_type));
fl = (0x2f - (data[5] & 0x7f)) + 1;
break;
case 0x30 ... 0x6f:
strncpy(token_type, "SAM", sizeof(token_type));
fl = (0x6f - (data[5] & 0x7f)) + 1;
break;
case 0x70 ... 0x7f:
strncpy(token_type, "GAM", sizeof(token_type));
fl = (0x7f - (data[5] & 0x7f)) + 1;
break;
}
stamp_len = 0xfc - data[6];
}
PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u), OL=%02u, FL=%02u",
dcf,
data[5],
data[6],
token_type,
(data[5] & 0x80 )>> 7,
stamp_len,
fl
);
} else { // Is IM(-S) type of card...
if(data[7] == 0x9F && data[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[5],
data[6],
token_type,
(data[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[7] & 0x0f,
(data[7] & 0x70) >> 4,
(data[7] & 0x80) >> 7,
data[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+8, 14));
} else {
PrintAndLog("Remaining Header Area");
PrintAndLog("%s", sprint_hex(data+9, 13));
}
}
}
uint8_t segCrcBytes[8] = {0,0,0,0,0,0,0,0};
uint32_t segCalcCRC = 0;
uint32_t segCRC = 0;
// Data card?
if(dcf <= 60000) {
PrintAndLog("\nADF: User Area");
PrintAndLog("------------------------------------------------------");
if(bIsSegmented) {
// Data start point on segmented cards
i = 22;
// decode segments
for (segmentNum=1; segmentNum < 128; segmentNum++ )
{
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 wrp_len = (wrp - wrc);
int remain_seg_payload_len = (segment_len - wrp - 5);
// validate segment-crc
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[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[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[i+3]^crc) & 0x80) >> 7,
segCRC,
( segCRC == segCalcCRC ) ? "OK" : "fail"
);
i += 5;
if ( hasWRC ) {
PrintAndLog("WRC protected area: (I %d | K %d| WRC %d)", i, k, wrc);
PrintAndLog("\nrow | data");
PrintAndLog("-----+------------------------------------------------");
for ( k=i; k < (i + wrc); ++k)
data[k] ^= crc;
print_hex_break( data+i, wrc, 16);
i += wrc;
}
if ( hasWRP ) {
PrintAndLog("Remaining write protected area: (I %d | K %d | WRC %d | WRP %d WRP_LEN %d)",i, k, wrc, wrp, wrp_len);
PrintAndLog("\nrow | data");
PrintAndLog("-----+------------------------------------------------");
for (k=i; k < (i+wrp_len); ++k)
data[k] ^= crc;
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[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("\nrow | data");
PrintAndLog("-----+------------------------------------------------");
for ( k=i; k < (i+remain_seg_payload_len); ++k)
data[k] ^= crc;
print_hex_break( data+i, remain_seg_payload_len, 16);
i += remain_seg_payload_len;
PrintAndLog("-----+------------------------------------------------\n");
// end with last segment
if (segment_flag & 0x8) return 0;
} // end for loop
} else {
// Data start point on unsegmented cards
i = 8;
wrp = data[7] & 0x0F;
wrc = (data[7] & 0x70) >> 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[7] & 0x80) >> 7
);
if ( hasWRC ) {
PrintAndLog("WRC protected area: (I %d | WRC %d)", i, wrc);
PrintAndLog("\nrow | data");
PrintAndLog("-----+------------------------------------------------");
print_hex_break( data+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 + 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[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 + i, remain_seg_payload_len, 16);
i += remain_seg_payload_len;
PrintAndLog("-----+------------------------------------------------\n");
}
}
return 0;
}
// params:
// offset in data memory
// number of bytes to read
int CmdLegicRdmem(const char *Cmd) {
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rdmem();
uint32_t offset = 0, len = 0, IV = 1;
sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
// OUT-OF-BOUNDS check
if ( len + offset > MAX_LENGTH ) {
len = MAX_LENGTH - offset;
PrintAndLog("Out-of-bound, shorten len to %d (0x%02X)", len, len);
}
legic_chk_iv(&IV);
UsbCommand c = {CMD_READER_LEGIC_RF, {offset, len, IV}};
clearCommandBuffer();
SendCommand(&c);
UsbCommand resp;
if ( !WaitForResponseTimeout(CMD_ACK, &resp, 3000) ) {
PrintAndLog("command execution time out");
return 1;
}
uint8_t isOK = resp.arg[0] & 0xFF;
uint16_t readlen = resp.arg[1];
if ( !isOK ) {
PrintAndLog("failed reading tag");
return 2;
}
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");
free(data);
return 1;
}
PrintAndLog("\n ## | Data");
PrintAndLog("-----+-----");
print_hex_break( data, readlen, 32);
free(data);
return 0;
}
// load, filename (ascii hex textfile)
// uploads it to device mem
int CmdLegicLoad(const char *Cmd) {
// iceman: potential bug, where all filepaths or filename which starts with H or h will print the helptext :)
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' || cmdp == 0x00) return usage_legic_load();
char filename[FILE_PATH_SIZE] = {0x00};
int len = strlen(Cmd);
if (len > FILE_PATH_SIZE) {
PrintAndLog("Filepath too long (was %s bytes), max allowed is %s ", len, FILE_PATH_SIZE);
return 0;
}
memcpy(filename, Cmd, len);
FILE *f = fopen(filename, "r");
if(!f) {
PrintAndLog("couldn't open '%s'", Cmd);
return -1;
}
char line[80];
int offset = 0;
uint8_t data[USB_CMD_DATA_SIZE] = {0x00};
int index = 0;
int totalbytes = 0;
while ( fgets(line, sizeof(line), f) ) {
int res = sscanf(line, "%x %x %x %x %x %x %x %x",
(unsigned int *)&data[index],
(unsigned int *)&data[index + 1],
(unsigned int *)&data[index + 2],
(unsigned int *)&data[index + 3],
(unsigned int *)&data[index + 4],
(unsigned int *)&data[index + 5],
(unsigned int *)&data[index + 6],
(unsigned int *)&data[index + 7]);
if(res != 8) {
PrintAndLog("Error: could not read samples");
fclose(f);
return -1;
}
index += res;
if ( index == USB_CMD_DATA_SIZE ){
// PrintAndLog("sent %d | %d | %d", index, offset, totalbytes);
UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
memcpy(c.d.asBytes, data, sizeof(data));
clearCommandBuffer();
SendCommand(&c);
if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){
PrintAndLog("Command execute timeout");
fclose(f);
return 1;
}
offset += index;
totalbytes += index;
index = 0;
}
}
fclose(f);
// left over bytes?
if ( index != 0 ) {
UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
memcpy(c.d.asBytes, data, 8);
clearCommandBuffer();
SendCommand(&c);
if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){
PrintAndLog("Command execute timeout");
return 1;
}
totalbytes += index;
}
PrintAndLog("loaded %u samples", totalbytes);
return 0;
}
// Save, filename, num of bytes, starting offset. (in decimal)
// ie: "hf legic save nnn.txt 100 0 (saves the first 100bytes)
// (ascii hex textfile)
int CmdLegicSave(const char *Cmd) {
int requested = 1024;
int offset = 0;
int delivered = 0;
char filename[FILE_PATH_SIZE] = {0x00};
uint8_t got[1024] = {0x00};
memset(filename, 0, FILE_PATH_SIZE);
sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
/* If no length given save entire legic read buffer */
/* round up to nearest 8 bytes so the saved data can be used with legicload */
if (requested == 0)
requested = 1024;
if (requested % 8 != 0) {
int remainder = requested % 8;
requested = requested + 8 - remainder;
}
if (offset + requested > sizeof(got)) {
PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
return 0;
}
GetFromBigBuf(got, requested, offset);
if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
PrintAndLog("Command execute timeout");
return 1;
}
FILE *f = fopen(filename, "w");
if(!f) {
PrintAndLog("couldn't open '%s'", Cmd+1);
return -1;
}
for (int j = 0; j < requested; j += 8) {
fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
got[j+0], got[j+1], got[j+2], got[j+3],
got[j+4], got[j+5], got[j+6], got[j+7]
);
delivered += 8;
if (delivered >= requested) break;
}
fclose(f);
PrintAndLog("saved %u samples", delivered);
return 0;
}
//TODO: write a help text (iceman)
// should say which tagtype
// should load a tag to device mem.
int CmdLegicRfSim(const char *Cmd) {
UsbCommand c = {CMD_SIMULATE_TAG_LEGIC_RF, {6,3,0}};
sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdLegicRfWrite(const char *Cmd) {
// offset - in tag memory
// length - num of bytes to be written
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_write();
uint32_t offset = 0, len = 0, IV = 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");
return -1;
}
// tagtype
legic_card_select_t card;
if (legic_get_type(&card)) {
PrintAndLog("Failed to identify tagtype");
return -1;
}
legic_print_type(card.cardsize, 0);
// OUT-OF-BOUNDS check
if ( len + offset > card.cardsize ) {
PrintAndLog("Out-of-bounds, Cardsize = %d, [offset+len = %d ]", card.cardsize, len + offset);
return -2;
}
legic_chk_iv(&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 )
PrintAndLog("failed writing tag");
} else {
PrintAndLog("command execution time out");
return 1;
}
return 0;
}
int CmdLegicRfRawWrite(const char *Cmd) {
PrintAndLog("############# DANGER !! #############");
PrintAndLog("# changing the DCF is irreversible #");
PrintAndLog("#####################################");
PrintAndLog("do youe really want to continue? y(es) n(o)");
// if (scanf(" %c", &answer) > 0 && (answer == 'y' || answer == 'Y')) {
// return 0;
// }
return 0;
}
void static calc4(uint8_t *cmd, uint8_t len){
}
int CmdLegicCalcCrc8(const char *Cmd){
uint8_t *data = NULL;
uint8_t cmdp = 0, uidcrc = 0, type=0;
bool errors = false;
int len = 0;
int bg, en;
while(param_getchar(Cmd, cmdp) != 0x00) {
switch(param_getchar(Cmd, cmdp)) {
case 'b':
case 'B':
// peek at length of the input string so we can
// figure out how many elements to malloc in "data"
bg=en=0;
if (param_getptr(Cmd, &bg, &en, cmdp+1)) {
errors = true;
break;
}
len = (en - bg + 1);
// check that user entered even number of characters
// for hex data string
if (len & 1) {
errors = true;
break;
}
// it's possible for user to accidentally enter "b" parameter
// more than once - we have to clean previous malloc
if (data) free(data);
data = malloc(len >> 1);
if ( data == NULL ) {
PrintAndLog("Can't allocate memory. exiting");
errors = true;
break;
}
if (param_gethex(Cmd, cmdp+1, data, len)) {
errors = true;
break;
}
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) free(data);
return usage_legic_calccrc8();
}
switch (type){
case 16:
PrintAndLog("Legic crc16: %X", CRC16Legic(data, len, uidcrc));
break;
case 4:
calc4(data, 0);
break;
default:
PrintAndLog("Legic crc8: %X", CRC8Legic(data, len) );
break;
}
if (data) free(data);
return 0;
}
int legic_print_type(uint32_t tagtype, uint8_t spaces){
char spc[11] = " ";
spc[10]=0x00;
char *spacer = spc + (10-spaces);
if ( tagtype == 22 )
PrintAndLog("%sTYPE : MIM%d card (outdated)", spacer, tagtype);
else if ( tagtype == 256 )
PrintAndLog("%sTYPE : MIM%d card (234 bytes)", spacer, tagtype);
else if ( tagtype == 1024 )
PrintAndLog("%sTYPE : MIM%d card (1002 bytes)", spacer, tagtype);
else
PrintAndLog("%sTYPE : Unknown %06x", spacer, tagtype);
return 0;
}
int legic_get_type(legic_card_select_t *card){
if ( card == NULL ) return 1;
UsbCommand c = {CMD_LEGIC_INFO, {0,0,0}};
clearCommandBuffer();
SendCommand(&c);
UsbCommand resp;
if (!WaitForResponseTimeout(CMD_ACK, &resp, 500))
return 2;
uint8_t isOK = resp.arg[0] & 0xFF;
if ( !isOK )
return 3;
memcpy(card, (legic_card_select_t *)resp.d.asBytes, sizeof(legic_card_select_t));
return 0;
}
void legic_chk_iv(uint32_t *iv){
if ( (*iv & 0x7F) != *iv ){
*iv &= 0x7F;
PrintAndLog("Truncating IV to 7bits, %u", *iv);
}
// IV must be odd
if ( (*iv & 1) == 0 ){
*iv |= 0x01;
PrintAndLog("LSB of IV must be SET %u", *iv);
}
}
void legic_seteml(uint8_t *src, uint32_t offset, uint32_t numofbytes) {
size_t len = 0;
UsbCommand c = {CMD_LEGIC_ESET, {0, 0, 0}};
for(size_t i = 0; i < numofbytes; i += USB_CMD_DATA_SIZE) {
len = MIN((numofbytes - i), USB_CMD_DATA_SIZE);
c.arg[0] = i; // offset
c.arg[1] = len; // number of bytes
memcpy(c.d.asBytes, src+i, len);
clearCommandBuffer();
SendCommand(&c);
PrintAndLog("ICE: offset %d | len %d", i, len);
}
}
int HFLegicReader(const char *Cmd, bool verbose) {
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_reader();
legic_card_select_t card;
switch(legic_get_type(&card)){
case 1:
if ( verbose ) PrintAndLog("command execution time out");
return 1;
case 2:
case 3:
if ( verbose ) PrintAndLog("legic card select failed");
return 2;
default: break;
}
PrintAndLog(" UID : %s", sprint_hex(card.uid, sizeof(card.uid)));
legic_print_type(card.cardsize, 0);
return 0;
}
int CmdLegicReader(const char *Cmd){
return HFLegicReader(Cmd, TRUE);
}
int CmdLegicDump(const char *Cmd){
FILE *f;
char filename[FILE_PATH_SIZE] = {0x00};
char *fnameptr = filename;
size_t fileNlen = 0;
bool errors = false;
uint16_t dumplen;
uint8_t cmdp = 0;
memset(filename, 0, sizeof(filename));
while(param_getchar(Cmd, cmdp) != 0x00) {
switch(param_getchar(Cmd, cmdp)) {
case 'h':
case 'H':
return usage_legic_dump();
case 'o':
case 'O':
fileNlen = param_getstr(Cmd, cmdp+1, filename);
if (!fileNlen)
errors = true;
if (fileNlen > FILE_PATH_SIZE-5)
fileNlen = FILE_PATH_SIZE-5;
cmdp += 2;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = true;
break;
}
if(errors) break;
}
//Validations
if(errors) return usage_legic_dump();
// tagtype
legic_card_select_t card;
if (legic_get_type(&card)) {
PrintAndLog("Failed to identify tagtype");
return -1;
}
dumplen = card.cardsize;
legic_print_type(dumplen, 0);
PrintAndLog("Reading tag memory...");
UsbCommand c = {CMD_READER_LEGIC_RF, {0x00, dumplen, 0x55}};
clearCommandBuffer();
SendCommand(&c);
UsbCommand resp;
if (!WaitForResponseTimeout(CMD_ACK, &resp, 3000)) {
PrintAndLog("Command execute time-out");
return 1;
}
uint8_t isOK = resp.arg[0] & 0xFF;
if ( !isOK ) {
PrintAndLog("Failed dumping tag data");
return 2;
}
uint16_t readlen = resp.arg[1];
uint8_t *data = malloc(readlen);
if (!data) {
PrintAndLog("Fail, cannot allocate memory");
return 3;
}
memset(data, 0, readlen);
if ( readlen != dumplen )
PrintAndLog("Fail, only managed to read 0x%02X bytes of 0x%02X", readlen, dumplen);
// copy data from device
GetEMLFromBigBuf(data, readlen, 0);
if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)) {
PrintAndLog("Fail, transfer from device time-out");
free(data);
return 4;
}
// user supplied filename?
if (fileNlen < 1)
sprintf(fnameptr,"%02X%02X%02X%02X.bin", data[0], data[1], data[2], data[3]);
else
sprintf(fnameptr + fileNlen,".bin");
if ((f = fopen(filename,"wb")) == NULL) {
PrintAndLog("Could not create file name %s", filename);
if (data)
free(data);
return 5;
}
fwrite(data, 1, readlen, f);
fclose(f);
free(data);
PrintAndLog("Wrote %d bytes to %s", readlen, filename);
return 0;
}
int CmdLegicELoad(const char *Cmd) {
FILE * f;
char filename[FILE_PATH_SIZE];
char *fnameptr = filename;
int len, numofbytes;
int nameParamNo = 1;
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'h' || cmdp == 'H' || cmdp == 0x00)
return usage_legic_eload();
switch (cmdp) {
case '0' : numofbytes = 22; break;
case '1' :
case '\0': numofbytes = 256; break;
case '2' : numofbytes = 1024; break;
default : numofbytes = 256; nameParamNo = 0;break;
}
// set up buffer
uint8_t *data = malloc(numofbytes);
if (!data) {
PrintAndLog("Fail, cannot allocate memory");
return 3;
}
memset(data, 0, numofbytes);
// set up file
len = param_getstr(Cmd, nameParamNo, filename);
if (len > FILE_PATH_SIZE - 5)
len = FILE_PATH_SIZE - 5;
fnameptr += len;
sprintf(fnameptr, ".bin");
// open file
if ((f = fopen(filename,"rb")) == NULL) {
PrintAndLog("File %s not found or locked", filename);
free(data);
return 1;
}
// load file
size_t bytes_read = fread(data, 1, numofbytes, f);
if ( bytes_read == 0){
PrintAndLog("File reading error");
free(data);
fclose(f);
return 2;
}
fclose(f);
// transfer to device
legic_seteml(data, 0, numofbytes);
free(data);
PrintAndLog("\nLoaded %d bytes from file: %s to emulator memory", numofbytes, filename);
return 0;
}
int CmdLegicESave(const char *Cmd) {
FILE *f;
char filename[FILE_PATH_SIZE];
char *fnameptr = filename;
int fileNlen, numofbytes, nameParamNo = 1;
memset(filename, 0, sizeof(filename));
char cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'h' || cmdp == 'H' || cmdp == 0x00)
return usage_legic_esave();
switch (cmdp) {
case '0' : numofbytes = 22; break;
case '1' :
case '\0': numofbytes = 256; break;
case '2' : numofbytes = 1024; break;
default : numofbytes = 256; nameParamNo = 0; break;
}
fileNlen = param_getstr(Cmd, nameParamNo, filename);
if (fileNlen > FILE_PATH_SIZE - 5)
fileNlen = FILE_PATH_SIZE - 5;
// set up buffer
uint8_t *data = malloc(numofbytes);
if (!data) {
PrintAndLog("Fail, cannot allocate memory");
return 3;
}
memset(data, 0, numofbytes);
// download emulator memory
PrintAndLog("Reading emulator memory...");
GetEMLFromBigBuf(data, numofbytes, 0);
if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)) {
PrintAndLog("Fail, transfer from device time-out");
free(data);
return 4;
}
// user supplied filename?
if (fileNlen < 1)
sprintf(fnameptr,"%02X%02X%02X%02X.bin", data[0], data[1], data[2], data[3]);
else
sprintf(fnameptr + fileNlen,".bin");
// open file
if ((f = fopen(filename,"wb")) == NULL) {
PrintAndLog("Could not create file name %s", filename);
free(data);
return 1;
}
fwrite(data, 1, numofbytes, f);
fclose(f);
free(data);
PrintAndLog("\nSaved %d bytes from emulator memory to file: %s", numofbytes, filename);
return 0;
}
static command_t CommandTable[] = {
{"help", CmdHelp, 1, "This help"},
{"reader", CmdLegicReader, 1, "LEGIC Prime Reader UID and Type tag info"},
{"info", CmdLegicInfo, 0, "Display deobfuscated and decoded LEGIC Prime tag data"},
{"dump", CmdLegicDump, 0, "Dump LEGIC Prime card to binary file"},
{"rdmem", CmdLegicRdmem, 0, "[offset][length] <iv> -- 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> <iv> -- Write sample buffer (user after load or read)"},
{"crc8", CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"},
{"eload", CmdLegicELoad, 1, "Load binary dump to emulator memory"},
{"esave", CmdLegicESave, 1, "Save emulator memory to binary file"},
{NULL, NULL, 0, NULL}
};
int CmdHFLegic(const char *Cmd) {
clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}
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