X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/9827020ac56300222a2bdabfc1858b8347345ca4..e4a8d1e2acc29213bcc204271ec85eb43bcf0716:/client/cmdhflegic.c diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c index 0ef74534..3ee6c5d5 100644 --- a/client/cmdhflegic.c +++ b/client/cmdhflegic.c @@ -7,230 +7,495 @@ //----------------------------------------------------------------------------- // High frequency Legic commands //----------------------------------------------------------------------------- - -#include -#include -#include "proxmark3.h" -#include "data.h" -#include "ui.h" -#include "cmdparser.h" #include "cmdhflegic.h" -#include "cmdmain.h" -#include "util.h" -#include "crc.h" + static int CmdHelp(const char *Cmd); -int usage_legic_calccrc8(void){ - PrintAndLog("Calculates the legic crc8 on the input hexbytes."); +#define MAX_LENGTH 1024 + +int usage_legic_calccrc(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 "); - PrintAndLog("Options :"); - PrintAndLog(" : hex bytes in a string"); + PrintAndLog("Usage: hf legic crc [h] b u c "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" b : hex bytes"); + PrintAndLog(" u : MCC hexbyte"); + PrintAndLog(" c : 8|16 bit crc size"); PrintAndLog(""); - PrintAndLog("Sample : hf legic crc8 deadbeef1122"); + PrintAndLog("Samples:"); + PrintAndLog(" hf legic crc b deadbeef1122"); + PrintAndLog(" hf legic crc 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 "); - PrintAndLog(" sample: hf legic load filename"); + PrintAndLog("Usage: hf legic load [h] "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" : 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] "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" : offset in data array to start download from (hex)"); + PrintAndLog(" : number of bytes to read (hex)"); + PrintAndLog(" : (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] "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" : offset in data array to start writing from (hex)"); + PrintAndLog(" : number of bytes to write (hex)"); + PrintAndLog(" : (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 "); + PrintAndLog("Options:"); + PrintAndLog(" h : this help"); + PrintAndLog(" n : 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] "); + 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 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 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 + * This is based on information given in the talk held * by Henryk Ploetz and Karsten Nohl at 26c3 */ -int CmdLegicDecode(const char *Cmd) { - // Index for the bytearray. - int i = 0; - int k = 0, segmentNum; - int segment_len = 0; - int segment_flag = 0; - uint8_t stamp_len = 0; - int crc = 0; - int wrp = 0; - int wrc = 0; - uint8_t data_buf[1200]; // receiver buffer, should be 1024.. - char token_type[4]; +int CmdLegicInfo(const char *Cmd) { - // copy data from proxmark into buffer - GetFromBigBuf(data_buf,sizeof(data_buf),0); - WaitForResponse(CMD_ACK,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_buf[4]; - uint32_t calc_crc = CRC8Legic(data_buf, 4); + crc = data[4]; + uint32_t calc_crc = CRC8Legic(data, 4); PrintAndLog("\nCDF: System Area"); - + PrintAndLog("------------------------------------------------------"); PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s", - data_buf[0], - data_buf[1], - data_buf[2], - data_buf[3], - data_buf[4], - (calc_crc == crc) ? "OK":"Fail" + data[0], + data[1], + data[2], + data[3], + data[4], + (calc_crc == crc) ? "OK":"Fail" ); - switch (data_buf[5] & 0x7f) { - case 0x00 ... 0x2f: - strncpy(token_type, "IAM",sizeof(token_type)); - break; - case 0x30 ... 0x6f: - strncpy(token_type, "SAM",sizeof(token_type)); - break; - case 0x70 ... 0x7f: - strncpy(token_type, "GAM",sizeof(token_type)); - break; - default: - strncpy(token_type, "???",sizeof(token_type)); - break; - } + // MCD = Manufacturer ID (should be list meaning something?) - stamp_len = 0xfc - data_buf[6]; + token_type[0] = 0; + dcf = ((int)data[6] << 8) | (int)data[5]; - PrintAndLog("DCF: %02x %02x, Token Type=%s (OLE=%01u), Stamp len=%02u", - data_buf[5], - data_buf[6], - token_type, - (data_buf[5]&0x80)>>7, - stamp_len - ); + // New unwritten media? + if(dcf == 0xFFFF) { - PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x", - data_buf[7]&0x0f, - (data_buf[7]&0x70)>>4, - (data_buf[7]&0x80)>>7, - data_buf[7], - data_buf[8] - ); + PrintAndLog("DCF: %d (%02x %02x), Token Type=NM (New Media)", + dcf, + data[5], + data[6] + ); + + } else if(dcf > 60000) { // Master token? - PrintAndLog("Remaining Header Area"); - PrintAndLog("%s", sprint_hex(data_buf+9, 13)); + 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] = {0x00}; + uint8_t segCrcBytes[8] = {0,0,0,0,0,0,0,0}; uint32_t segCalcCRC = 0; uint32_t segCRC = 0; - PrintAndLog("\nADF: User Area"); - printf("-------------------------------------\n"); - i = 22; - // 64 potential segements - for ( segmentNum=0; segmentNum<64; segmentNum++ ) { - segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc); - segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4; - - wrp = (data_buf[i+2]^crc); - wrc = ((data_buf[i+3]^crc)&0x70)>>4; - - bool hasWRC = (wrc > 0); - bool hasWRP = (wrp > wrc); - int wrp_len = (wrp - wrc); - int remain_seg_payload_len = (segment_len - wrp - 5); + // 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_buf[0]; //uid0 - segCrcBytes[1]=data_buf[1]; //uid1 - segCrcBytes[2]=data_buf[2]; //uid2 - segCrcBytes[3]=data_buf[3]; //uid3 - segCrcBytes[4]=(data_buf[i]^crc); //hdr0 - segCrcBytes[5]=(data_buf[i+1]^crc); //hdr1 - segCrcBytes[6]=(data_buf[i+2]^crc); //hdr2 - segCrcBytes[7]=(data_buf[i+3]^crc); //hdr3 - - segCalcCRC = CRC8Legic(segCrcBytes, 8); - segCRC = data_buf[i+4]^crc; - - PrintAndLog("Segment %02u \nraw header=0x%02X 0x%02X 0x%02X 0x%02X \nSegment len: %u, Flag: 0x%X (valid:%01u, last:%01u), WRP: %02u, WRC: %02u, RD: %01u, CRC: 0x%02X (%s)", - segmentNum, - data_buf[i]^crc, - data_buf[i+1]^crc, - data_buf[i+2]^crc, - data_buf[i+3]^crc, - segment_len, - segment_flag, - (segment_flag & 0x4) >> 2, - (segment_flag & 0x8) >> 3, - wrp, - wrc, - ((data_buf[i+3]^crc) & 0x80) >> 7, - segCRC, - ( segCRC == segCalcCRC ) ? "OK" : "fail" - ); + // 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 - i += 5; + 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); - - for ( k=i; k < wrc; k++) - data_buf[k] ^= crc; - - //is WRC / 8? - - // for ( k=i; k < wrc; k += 8) - print_hex_break( data_buf+i, wrc, 16); + 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; - } + 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); + 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("-----+------------------------------------------------"); - // de-xor? if not zero, assume it needs xoring. - if ( data_buf[i] > 0) { - for (k=i; k < wrp_len; k++) - data_buf[k] ^= crc; - } + for (k=i; k < (i+wrp_len); ++k) + data[k] ^= crc; - // for (k=i; k < wrp_len; k += 16) { - - print_hex_break( data_buf+i, wrp_len, 16); - // } + print_hex_break( data+i, wrp_len, 16); - i += wrp_len; + i += wrp_len; - if( wrp_len == 8 ) - PrintAndLog("Card ID: %2X%02X%02X", data_buf[i-4]^crc, data_buf[i-3]^crc, data_buf[i-2]^crc); - } + // 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:"); - - if ( data_buf[i] > 0 ) { - for ( k=i; k < remain_seg_payload_len; k++) - data_buf[k] ^= 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; - // for ( k=i; k < remain_seg_payload_len; k++) - print_hex_break( data_buf+i, remain_seg_payload_len, 16); + print_hex_break( data+i, remain_seg_payload_len, 16); - i += remain_seg_payload_len; + i += remain_seg_payload_len; + + PrintAndLog("-----+------------------------------------------------\n"); + + // end with last segment + if (segment_flag & 0x8) return 0; + + } // end for loop - printf("\n-------------------------------------\n"); - // end with last segment - if (segment_flag & 0x8) return 0; + } 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 + ); - } // end for loop + 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 CmdLegicRFRead(const char *Cmd) { - int byte_count=0, offset=0; - sscanf(Cmd, "%i %i", &offset, &byte_count); - if(byte_count == 0) byte_count = -1; - if(byte_count + offset > 1024) byte_count = 1024 - offset; +// params: +// offset in data memory +// number of bytes to read +int CmdLegicRdmem(const char *Cmd) { - UsbCommand c= {CMD_READER_LEGIC_RF, {offset, byte_count, 0}}; + 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(); @@ -307,13 +572,18 @@ int CmdLegicLoad(const char *Cmd) { 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]; + 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 */ @@ -331,15 +601,18 @@ int CmdLegicSave(const char *Cmd) { 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; } - - GetFromBigBuf(got, requested, offset); - WaitForResponse(CMD_ACK, NULL); - + 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], @@ -354,6 +627,9 @@ int CmdLegicSave(const char *Cmd) { 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]); @@ -363,67 +639,471 @@ int CmdLegicRfSim(const char *Cmd) { } int CmdLegicRfWrite(const char *Cmd) { - UsbCommand c = {CMD_WRITER_LEGIC_RF}; - int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]); - if(res != 2) { - PrintAndLog("Please specify the offset and length as two hex strings"); + + // 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 CmdLegicRfFill(const char *Cmd) { - UsbCommand cmd = {CMD_WRITER_LEGIC_RF}; - int res = sscanf(Cmd, " 0x%"llx" 0x%"llx" 0x%"llx, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]); - if(res != 3) { - PrintAndLog("Please specify the offset, length and value as two hex strings"); - return -1; - } +/* +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; +} +*/ - int i; - UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 0, 0}}; - for(i = 0; i < 48; i++) { - c.d.asBytes[i] = cmd.arg[2]; - } +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(); + } - for(i = 0; i < 22; i++) { - c.arg[0] = i*48; + 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); - WaitForResponse(CMD_ACK,NULL); + 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(&cmd); - return 0; - } + 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; + } -int CmdLegicCalcCrc8(const char *Cmd){ + // 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"); - int len = strlen(Cmd); - if (len & 1 ) return usage_legic_calccrc8(); + 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; - uint8_t *data = malloc(len); - if ( data == NULL ) return 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); - param_gethex(Cmd, 0, data, len ); + // 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"); - uint32_t checksum = CRC8Legic(data, len/2); - PrintAndLog("Bytes: %s || CRC8: %X", sprint_hex(data, len/2), checksum ); + // 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"}, - {"decode", CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"}, - {"read", CmdLegicRFRead, 0, "[offset][length] -- read bytes from a LEGIC card"}, - {"save", CmdLegicSave, 0, " [] -- Store samples"}, - {"load", CmdLegicLoad, 0, " -- Restore samples"}, - {"sim", CmdLegicRfSim, 0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"}, - {"write", CmdLegicRfWrite,0, " -- Write sample buffer (user after load or read)"}, - {"fill", CmdLegicRfFill, 0, " -- Fill/Write tag with constant value"}, - {"crc8", CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"}, + {"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] -- read bytes from a LEGIC card"}, + {"save", CmdLegicSave, 0, " [] -- Store samples"}, + {"load", CmdLegicLoad, 0, " -- Restore samples"}, + {"sim", CmdLegicRfSim, 0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"}, + {"write", CmdLegicRfWrite, 0, " -- Write sample buffer (user after load or read)"}, + {"crc", CmdLegicCalcCrc, 1, "Calculate Legic CRC 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} };