X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/7fe9b0b742d7dae9c5af1d292d11840b5c3cbfae..6fe5fe8d521821b6d9615d9c77031097c94ef50e:/client/cmdhflegic.c diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c index 62ff9428..3cc6c406 100644 --- a/client/cmdhflegic.c +++ b/client/cmdhflegic.c @@ -1,31 +1,1271 @@ -#include "proxusb.h" -#include "cmdparser.h" +//----------------------------------------------------------------------------- +// Copyright (C) 2010 iZsh +// +// 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 u c <8|16>"); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" d : (hex symbols) bytes to calculate crc over"); + PrintAndLog(" u : 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] "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" : (hex) offset in data array to start download from"); + PrintAndLog(" : (hex) number of bytes to read"); + PrintAndLog(" : (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] "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" : 0 = MIM22"); + PrintAndLog(" : 1 = MIM256 (default)"); + PrintAndLog(" : 2 = MIM1024"); + PrintAndLog(" : phase drift"); + PrintAndLog(" : frame drift"); + PrintAndLog(" : 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 d "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" o : (hex) offset in data array to start writing"); + //PrintAndLog(" : (optional) Initialization vector to use (ODD and 7bits)"); + PrintAndLog(" d : (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 "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" o : 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 "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" i : 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] "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" [card memory] : 0 = MIM22"); + PrintAndLog(" : 1 = MIM256 (default)"); + PrintAndLog(" : 2 = MIM1024"); + PrintAndLog(" : 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 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; + + // 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); + + // 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, " %"lli" %"lli" %"lli, &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; + } -int CmdHFLegic(const char *Cmd) -{ - CmdsParse(CommandTable, Cmd); - return 0; + 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"); + + 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 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"); + + if ((f = fopen(filename,"rb")) == NULL) { + 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); + if ( bytes_read == 0){ + PrintAndLog("File reading error"); + free(data); + fclose(f); + return 2; + } + fclose(f); + + 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 + 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; } -int CmdHelp(const char *Cmd) -{ - CmdsHelp(CommandTable); - 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