-#include "proxusb.h"
-#include "cmdparser.h"
+//-----------------------------------------------------------------------------
+// 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);
-int CmdLegicRFRead(const char *Cmd)
-{
- UsbCommand c = {CMD_READER_LEGIC_RF};
- SendCommand(&c);
- return 0;
+#define MAX_LENGTH 1024
+
+int usage_legic_calccrc(void){
+ PrintAndLog("Calculates the legic crc8/crc16 on the given data.");
+ PrintAndLog("There must be an even number of hexsymbols as input.");
+ PrintAndLog("Usage: hf legic crc [h] d <data> u <uidcrc> c <8|16>");
+ PrintAndLog("Options:");
+ PrintAndLog(" h : this help");
+ PrintAndLog(" d <data> : (hex symbols) bytes to calculate crc over");
+ PrintAndLog(" u <uidcrc> : MCC hexbyte");
+ PrintAndLog(" c <8|16> : Crc type");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic crc b deadbeef1122");
+ PrintAndLog(" hf legic crc b deadbeef1122 u 9A c 16");
+ 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> : (hex) offset in data array to start download from");
+ PrintAndLog(" <length> : (hex) number of bytes to read");
+ PrintAndLog(" <IV> : (hex) (optional) Initialization vector to use. Must be odd and 7bits max");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic rdmem 0 16 - reads from byte[0] 0x16 bytes(system header)");
+ PrintAndLog(" hf legic rdmem 0 4 55 - reads from byte[0] 0x4 bytes with IV 0x55");
+ PrintAndLog(" hf legic rdmem 0 100 55 - reads 0x100 bytes with IV 0x55");
+ return 0;
+}
+int usage_legic_sim(void){
+ PrintAndLog("Simulates a LEGIC Prime tag. MIM22, MIM256, MIM1024 types can be emulated");
+ PrintAndLog("Use eload/esave to upload a dump into emulator memory");
+ PrintAndLog("Usage: hf legic sim [h] <tagtype> <phase> <frame> <reqresp>");
+ PrintAndLog("Options:");
+ PrintAndLog(" h : this help");
+ PrintAndLog(" <tagtype> : 0 = MIM22");
+ PrintAndLog(" : 1 = MIM256 (default)");
+ PrintAndLog(" : 2 = MIM1024");
+ PrintAndLog(" <phase> : phase drift");
+ PrintAndLog(" <frame> : frame drift");
+ PrintAndLog(" <reqresp> : reqresp drift");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic sim");
+ PrintAndLog(" hf legic sim ");
+ return 0;
+}
+int usage_legic_write(void){
+ PrintAndLog("Write data to a LEGIC Prime tag. It autodetects tagsize to make sure size");
+ PrintAndLog("Usage: hf legic write [h] o <offset> d <data (hex symbols)>");
+ PrintAndLog("Options:");
+ PrintAndLog(" h : this help");
+ PrintAndLog(" o <offset> : (hex) offset in data array to start writing");
+ //PrintAndLog(" <IV> : (optional) Initialization vector to use (ODD and 7bits)");
+ PrintAndLog(" d <data> : (hex symbols) bytes to write ");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic write o 10 d 11223344 - Write 0x11223344 starting from offset 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 Prime 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(" o <filename> : filename w/o '.bin' to dump bytes");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic dump");
+ PrintAndLog(" hf legic dump o myfile");
+ return 0;
+}
+int usage_legic_restore(void){
+ PrintAndLog("Reads binary file and it autodetects card type and verifies that the file has the same size");
+ PrintAndLog("Then write the data back to card. All bytes except the first 7bytes [UID(4) MCC(1) DCF(2)]\n");
+ PrintAndLog("Usage: hf legic restore [h] i <filename w/o .bin>");
+ PrintAndLog("Options:");
+ PrintAndLog(" h : this help");
+ PrintAndLog(" i <filename> : filename w/o '.bin' to restore bytes on to card from");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic restore i 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 2 myfile");
+ 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 2 myfile");
+ return 0;
+}
+int usage_legic_wipe(void){
+ PrintAndLog("Fills a legic tag memory with zeros. From byte7 and to the end.");
+ PrintAndLog(" Usage: hf legic wipe [h]");
+ PrintAndLog("Options:");
+ PrintAndLog(" h : this help");
+ PrintAndLog("");
+ PrintAndLog("Samples:");
+ PrintAndLog(" hf legic wipe");
+ 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) {
-static command_t CommandTable[] =
-{
- {"help", CmdHelp, 1, "This help"},
- {"reader", CmdLegicRFRead, 0, "Start the LEGIC RF reader"},
- {NULL, NULL, 0, NULL}
-};
+ 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;
-int CmdHFLegic(const char *Cmd)
-{
- CmdsParse(CommandTable, Cmd);
- return 0;
+ // 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;
}
-int CmdHelp(const char *Cmd)
-{
- CmdsHelp(CommandTable);
- 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);
+
+ // 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
+ // UID 4 bytes can't be written to.
+ if ( len + offset >= card.cardsize ) {
+ len = card.cardsize - offset;
+ PrintAndLog("Out-of-bounds, Cardsize = %d, Trunc offset+len = %d", card.cardsize, len + offset);
+ }
+
+ 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 ## | 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F");
+ PrintAndLog("-----+------------------------------------------------------------------------------------------------");
+ print_hex_break( data, readlen, 32);
+ free(data);
+ return 0;
+}
+
+// should say which tagtype
+// should load a tag to device mem.
+// int phase, int frame, int reqresp
+int CmdLegicRfSim(const char *Cmd) {
+ UsbCommand c = {CMD_SIMULATE_TAG_LEGIC_RF, {6,3,0}};
+ sscanf(Cmd, " %" SCNi64 " %" SCNi64 " %" SCNi64 , &c.arg[0], &c.arg[1], &c.arg[2]);
+ clearCommandBuffer();
+ SendCommand(&c);
+ return 0;
}
+
+int CmdLegicRfWrite(const char *Cmd) {
+
+ uint8_t *data = NULL;
+ uint8_t cmdp = 0;
+ bool errors = false;
+ int len = 0, bg, en;
+ uint32_t offset = 0, IV = 0x55;
+
+ while(param_getchar(Cmd, cmdp) != 0x00) {
+ switch(param_getchar(Cmd, cmdp)) {
+ case 'd':
+ case 'D':
+ // 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;
+ }
+
+ // limit number of bytes to write. This is not a 'restore' command.
+ if ( (len>>1) > 100 ){
+ PrintAndLog("Max bound on 100bytes to write a one time.");
+ PrintAndLog("Use the 'hf legic restore' command if you want to write the whole tag at once");
+ errors = true;
+ }
+
+ // 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 'o':
+ case 'O':
+ offset = param_get32ex(Cmd, cmdp+1, 4, 16);
+ 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_write();
+ }
+
+ // 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 checks
+ // UID 4+1 bytes can't be written to.
+ if ( offset < 5 ) {
+ PrintAndLog("Out-of-bounds, bytes 0-1-2-3-4 can't be written to. Offset = %d", offset);
+ return -2;
+ }
+
+ if ( len + offset >= card.cardsize ) {
+ PrintAndLog("Out-of-bounds, Cardsize = %d, [offset+len = %d ]", card.cardsize, len + offset);
+ return -2;
+ }
+
+ if (offset == 5 || offset == 6) {
+ PrintAndLog("############# DANGER ################");
+ PrintAndLog("# changing the DCF is irreversible #");
+ PrintAndLog("#####################################");
+ char *answer = NULL;
+ answer = readline("do you really want to continue? y(es) n(o) : ");
+ bool overwrite = (answer[0] == 'y' || answer[0] == 'Y');
+ if (!overwrite){
+ PrintAndLog("command cancelled");
+ return 0;
+ }
+ }
+
+ legic_chk_iv(&IV);
+
+ PrintAndLog("Writing to tag");
+
+ UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}};
+ memcpy(c.d.asBytes, data, len);
+ UsbCommand resp;
+ clearCommandBuffer();
+ SendCommand(&c);
+
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
+ PrintAndLog("command execution time out");
+ return 1;
+ }
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ if ( !isOK ) {
+ PrintAndLog("failed writing tag");
+ return 1;
+ }
+
+ return 0;
+}
+
+int CmdLegicCalcCrc(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_calccrc();
+ }
+
+ switch (type){
+ case 16:
+ PrintAndLog("Legic crc16: %X", CRC16Legic(data, len, uidcrc));
+ 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);
+ }
+}
+
+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");
+
+ f = fopen(filename,"wb");
+ if (!f) {
+ 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 CmdLegicRestore(const char *Cmd){
+
+ FILE *f;
+ char filename[FILE_PATH_SIZE] = {0x00};
+ char *fnameptr = filename;
+ size_t fileNlen = 0;
+ bool errors = true;
+ uint16_t numofbytes;
+ uint8_t cmdp = 0;
+
+ memset(filename, 0, sizeof(filename));
+
+ while(param_getchar(Cmd, cmdp) != 0x00) {
+ switch(param_getchar(Cmd, cmdp)) {
+ case 'h':
+ case 'H':
+ errors = true;
+ break;
+ case 'i':
+ case 'I':
+ fileNlen = param_getstr(Cmd, cmdp+1, filename);
+ if (!fileNlen)
+ errors = true;
+ else
+ errors = false;
+
+ 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_restore();
+
+ // tagtype
+ legic_card_select_t card;
+ if (legic_get_type(&card)) {
+ PrintAndLog("Failed to identify tagtype");
+ return 1;
+ }
+ numofbytes = card.cardsize;
+
+ // set up buffer
+ uint8_t *data = malloc(numofbytes);
+ if (!data) {
+ PrintAndLog("Fail, cannot allocate memory");
+ return 2;
+ }
+ memset(data, 0, numofbytes);
+
+ legic_print_type(numofbytes, 0);
+
+ // set up file
+ fnameptr += fileNlen;
+ sprintf(fnameptr, ".bin");
+
+ f = fopen(filename,"rb");
+ if (!f) {
+ PrintAndLog("File %s not found or locked", filename);
+ return 3;
+ }
+
+ // verify size of dumpfile is the same as card.
+ fseek(f, 0, SEEK_END); // seek to end of file
+ size_t filesize = ftell(f); // get current file pointer
+ fseek(f, 0, SEEK_SET); // seek back to beginning of file
+
+ if ( filesize != numofbytes) {
+ PrintAndLog("Fail, filesize and cardsize is not equal. [%u != %u]", filesize, numofbytes);
+ free(data);
+ fclose(f);
+ return 4;
+ }
+
+ // load file
+ size_t bytes_read = fread(data, 1, numofbytes, f);
+ fclose(f);
+
+ if ( bytes_read == 0){
+ PrintAndLog("File reading error");
+ free(data);
+ return 2;
+ }
+
+ PrintAndLog("Restoring to card");
+
+ // transfer to device
+ size_t len = 0;
+ UsbCommand c = {CMD_WRITER_LEGIC_RF, {0, 0, 0x55}};
+ UsbCommand resp;
+ for(size_t i = 7; 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, data+i, len);
+ clearCommandBuffer();
+ SendCommand(&c);
+
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+ PrintAndLog("command execution time out");
+ free(data);
+ return 1;
+ }
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ if ( !isOK ) {
+ PrintAndLog("failed writing tag [msg = %u]", resp.arg[1] & 0xFF);
+ free(data);
+ return 1;
+ }
+ PrintAndLog("Wrote chunk [offset %d | len %d | total %d", i, len, i+len);
+ }
+
+ free(data);
+ PrintAndLog("\nWrote %d bytes to card from file %s", numofbytes, 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
+ f = fopen(filename,"rb");
+ if (!f) {
+ 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);
+ f = NULL;
+ return 2;
+ }
+ fclose(f);
+ f = NULL;
+
+ // 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
+ f = fopen(filename,"wb");
+ if (!f) {
+ 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;
+}
+
+int CmdLegicWipe(const char *Cmd){
+
+ char cmdp = param_getchar(Cmd, 0);
+
+ if ( cmdp == 'h' || cmdp == 'H') return usage_legic_wipe();
+
+ // tagtype
+ legic_card_select_t card;
+ if (legic_get_type(&card)) {
+ PrintAndLog("Failed to identify tagtype");
+ return 1;
+ }
+
+ // set up buffer
+ uint8_t *data = malloc(card.cardsize);
+ if (!data) {
+ PrintAndLog("Fail, cannot allocate memory");
+ return 2;
+ }
+ memset(data, 0, card.cardsize);
+
+ legic_print_type(card.cardsize, 0);
+
+ printf("Erasing");
+
+ // transfer to device
+ size_t len = 0;
+ UsbCommand c = {CMD_WRITER_LEGIC_RF, {0, 0, 0x55}};
+ UsbCommand resp;
+ for(size_t i = 7; i < card.cardsize; i += USB_CMD_DATA_SIZE) {
+
+ printf(".");
+ len = MIN((card.cardsize - i), USB_CMD_DATA_SIZE);
+ c.arg[0] = i; // offset
+ c.arg[1] = len; // number of bytes
+ memcpy(c.d.asBytes, data+i, len);
+ clearCommandBuffer();
+ SendCommand(&c);
+
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+ PrintAndLog("command execution time out");
+ free(data);
+ return 3;
+ }
+ uint8_t isOK = resp.arg[0] & 0xFF;
+ if ( !isOK ) {
+ PrintAndLog("failed writing tag [msg = %u]", resp.arg[1] & 0xFF);
+ free(data);
+ return 4;
+ }
+ }
+ printf("ok\n");
+ return 0;
+}
+
+int CmdLegicList(const char *Cmd) {
+ CmdHFList("legic");
+ return 0;
+}
+
+static command_t CommandTable[] = {
+ {"help", CmdHelp, 1, "This help"},
+ {"reader", CmdLegicReader, 1, "LEGIC Prime Reader UID and tag info"},
+ {"info", CmdLegicInfo, 0, "Display deobfuscated and decoded LEGIC Prime tag data"},
+ {"dump", CmdLegicDump, 0, "Dump LEGIC Prime tag to binary file"},
+ {"restore", CmdLegicRestore, 0, "Restore a dump onto a LEGIC Prime tag"},
+ {"rdmem", CmdLegicRdmem, 0, "Read bytes from a LEGIC Prime tag"},
+ {"sim", CmdLegicRfSim, 0, "Start tag simulator"},
+ {"write", CmdLegicRfWrite, 0, "Write data to a LEGIC Prime tag"},
+ {"crc", CmdLegicCalcCrc, 1, "Calculate Legic CRC over given bytes"},
+ {"eload", CmdLegicELoad, 1, "Load binary dump to emulator memory"},
+ {"esave", CmdLegicESave, 1, "Save emulator memory to binary file"},
+ {"list", CmdLegicList, 1, "[Deprecated] List LEGIC history"},
+ {"wipe", CmdLegicWipe, 1, "Wipe a LEGIC Prime tag"},
+ {NULL, NULL, 0, NULL}
+};
+
+int CmdHFLegic(const char *Cmd) {
+ clearCommandBuffer();
+ CmdsParse(CommandTable, Cmd);
+ return 0;
+}
+
+int CmdHelp(const char *Cmd) {
+ CmdsHelp(CommandTable);
+ return 0;
+}
\ No newline at end of file
projects / proxmark3-svn / blobdiff