X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c6e0a2ebebb186849764b5a227662c515cfd7c6b..53b3c3e816c8a322a15d2b20652d6126baa6644a:/client/cmdhflegic.c diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c index aef6ef0c..d6aaaf3d 100644 --- a/client/cmdhflegic.c +++ b/client/cmdhflegic.c @@ -7,27 +7,21 @@ //----------------------------------------------------------------------------- // 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."); + 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("Usage: hf legic crc8 [h] b u "); PrintAndLog("Options :"); - PrintAndLog(" : hex bytes in a string"); + PrintAndLog(" b : hex bytes"); + PrintAndLog(" u : MCC hexbyte"); PrintAndLog(""); - PrintAndLog("Sample : hf legic crc8 deadbeef1122"); + PrintAndLog("Samples :"); + PrintAndLog(" hf legic crc8 b deadbeef1122"); + PrintAndLog(" hf legic crc8 b deadbeef1122 u 9A"); return 0; } @@ -38,33 +32,50 @@ int usage_legic_load(void){ return 0; } +int usage_legic_read(void){ + PrintAndLog("Read data from a legic tag."); + PrintAndLog("Usage: hf legic read "); + PrintAndLog("Options :"); + PrintAndLog(" : offset in data array to start download from"); + PrintAndLog(" : number of bytes to download"); + PrintAndLog(""); + PrintAndLog(" sample: hf legic read"); + 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) { - int i, k, n; + // Index for the bytearray. + int i = 0; + int k = 0, segmentNum; int segment_len = 0; int segment_flag = 0; - int stamp_len = 0; + uint8_t stamp_len = 0; int crc = 0; int wrp = 0; int wrc = 0; - uint8_t data_buf[1200]; // receiver buffer - //char out_string[3076]; // just use big buffer - bad practice - char token_type[4]; - - // copy data from proxmark into buffer - GetFromBigBuf(data_buf,sizeof(data_buf),0); - WaitForResponse(CMD_ACK,NULL); - + uint8_t data_buf[1052]; // receiver buffer, should be 1024.. + char token_type[5]; + int dcf; + int bIsSegmented = 0; + + // download EML memory, where the "legic read" command puts the data. + GetEMLFromBigBuf(data_buf, sizeof(data_buf), 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); PrintAndLog("\nCDF: System Area"); - + PrintAndLog("------------------------------------------------------"); PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s", data_buf[0], data_buf[1], @@ -74,134 +85,268 @@ int CmdLegicDecode(const char *Cmd) { (calc_crc == crc) ? "OK":"Fail" ); - switch (data_buf[5]&0x7f) { + + token_type[0] = 0; + dcf = ((int)data_buf[6] << 8) | (int)data_buf[5]; + + // New unwritten media? + if(dcf == 0xFFFF) { + + PrintAndLog("DCF: %d (%02x %02x), Token Type=NM (New Media)", + dcf, + data_buf[5], + data_buf[6] + ); + + } else if(dcf > 60000) { // Master token? + + int fl = 0; + + if(data_buf[6] == 0xec) { + strncpy(token_type, "XAM", sizeof(token_type)); + fl = 1; + stamp_len = 0x0c - (data_buf[5] >> 4); + } else { + switch (data_buf[5] & 0x7f) { case 0x00 ... 0x2f: strncpy(token_type, "IAM",sizeof(token_type)); + fl = (0x2f - (data_buf[5] & 0x7f)) + 1; break; case 0x30 ... 0x6f: - strcpy(token_type, "SAM"); + strncpy(token_type, "SAM",sizeof(token_type)); + fl = (0x6f - (data_buf[5] & 0x7f)) + 1; break; case 0x70 ... 0x7f: - strcpy(token_type, "GAM"); - break; - default: - strcpy(token_type, "???"); + strncpy(token_type, "GAM",sizeof(token_type)); + fl = (0x7f - (data_buf[5] & 0x7f)) + 1; break; } stamp_len = 0xfc - data_buf[6]; + } - PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u", + PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u), OL=%02u, FL=%02u", + dcf, data_buf[5], data_buf[6], token_type, (data_buf[5]&0x80)>>7, - stamp_len + stamp_len, + fl ); - PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x", + } else { // Is IM(-S) type of card... + + if(data_buf[7] == 0x9F && data_buf[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_buf[5], + data_buf[6], + token_type, + (data_buf[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_buf[7]&0x0f, (data_buf[7]&0x70)>>4, (data_buf[7]&0x80)>>7, - data_buf[7], data_buf[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_buf+8, 14)); + } else { PrintAndLog("Remaining Header Area"); PrintAndLog("%s", sprint_hex(data_buf+9, 13)); - PrintAndLog("\nADF: User Area"); - - i = 22; + } + } + } + + uint8_t segCrcBytes[8] = {0x00}; uint32_t segCalcCRC = 0; uint32_t segCRC = 0; + + + // Data card? + if(dcf <= 60000) { - for ( n=0; n<64; n++ ) { + 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_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; - /* validate segment-crc */ - segCRC = data_buf[i+4]^crc; + bool hasWRC = (wrc > 0); + bool hasWRP = (wrp > wrc); + int wrp_len = (wrp - wrc); + int remain_seg_payload_len = (segment_len - wrp - 5); - 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 + // 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: raw header=%02x %02x %02x %02x, flag=%01x (valid=%01u, last=%01u), len=%04u, WRP=%02u, WRC=%02u, RD=%01u, CRC=%02x (%s)", - n, + 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, - segment_len, + (segment_flag & 0x4) >> 2, + (segment_flag & 0x8) >> 3, wrp, wrc, - ((data_buf[i+3]^crc)&0x80)>>7, + ((data_buf[i+3]^crc) & 0x80) >> 7, segCRC, ( segCRC == segCalcCRC ) ? "OK" : "fail" ); i += 5; - if ( wrc>0 ) { - PrintAndLog("WRC protected area:"); - - for ( k=i; k < wrc; k++) - data_buf[k] ^= crc; - - for ( k=i; k < wrc; k += 8) - PrintAndLog("%s", sprint_hex( data_buf+k, 8) ); + 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_buf[k] ^= crc; + + print_hex_break( data_buf+i, wrc, 16); i += wrc; } - if ( wrp>wrc ) { - PrintAndLog("Remaining write protected area:"); + 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("-----+------------------------------------------------"); - if ( data_buf[k] > 0) { - for (k=i; k < (wrp-wrc); k++) + for (k=i; k < (i+wrp_len); ++k) data_buf[k] ^= crc; - } - for (k=i; k < (wrp-wrc); k++) - PrintAndLog("%s", sprint_hex( data_buf+k, 16) ); - - i += (wrp-wrc); + print_hex_break( data_buf+i, wrp_len, 16); + + i += wrp_len; - if( (wrp-wrc) == 8 ) + // does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...) + if( wrp_len == 8 ) PrintAndLog("Card ID: %2X%02X%02X", data_buf[i-4]^crc, data_buf[i-3]^crc, data_buf[i-2]^crc); } - PrintAndLog("Remaining segment payload:"); - - if ( data_buf[k] > 0 ) { - for ( k=i; k < (segment_len - wrp - 5); k++) + 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_buf[k] ^= crc; - } - for ( k=i; k < (segment_len - wrp - 5); k++) - PrintAndLog("%s", sprint_hex( data_buf+k, 16) ); + print_hex_break( data_buf+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_buf[7] & 0x0F; + wrc = (data_buf[7] & 0x07) >> 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_buf[7] & 0x80) >> 7 + ); + + if ( hasWRC ) { + PrintAndLog("WRC protected area: (I %d | WRC %d)", i, wrc); + PrintAndLog("\nrow | data"); + PrintAndLog("-----+------------------------------------------------"); + print_hex_break( data_buf+i, wrc, 16); + 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_buf+i, wrp_len, 16); + i += wrp_len; + + // does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...) + if( wrp_len == 8 ) + PrintAndLog("Card ID: %2X%02X%02X", data_buf[i-4], data_buf[i-3], data_buf[i-2]); + } + + PrintAndLog("Remaining segment payload: (I %d | Remain LEN %d)", i, remain_seg_payload_len); + PrintAndLog("\nrow | data"); + PrintAndLog("-----+------------------------------------------------"); + print_hex_break( data_buf+i, remain_seg_payload_len, 16); + i += remain_seg_payload_len; + + PrintAndLog("-----+------------------------------------------------\n"); + } + } + return 0; } int CmdLegicRFRead(const char *Cmd) { + + // params: + // offset in data + // number of bytes. + char cmdp = param_getchar(Cmd, 0); + if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_read(); + int byte_count=0, offset=0; sscanf(Cmd, "%i %i", &offset, &byte_count); if(byte_count == 0) byte_count = -1; @@ -262,8 +407,11 @@ int CmdLegicLoad(const char *Cmd) { memcpy(c.d.asBytes, data, sizeof(data)); clearCommandBuffer(); SendCommand(&c); - WaitForResponse(CMD_ACK, NULL); - + if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){ + PrintAndLog("Command execute timeout"); + fclose(f); + return 1; + } offset += index; totalbytes += index; index = 0; @@ -277,7 +425,10 @@ int CmdLegicLoad(const char *Cmd) { memcpy(c.d.asBytes, data, 8); clearCommandBuffer(); SendCommand(&c); - WaitForResponse(CMD_ACK, NULL); + if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){ + PrintAndLog("Command execute timeout"); + return 1; + } totalbytes += index; } @@ -309,15 +460,18 @@ 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], @@ -332,6 +486,7 @@ int CmdLegicSave(const char *Cmd) { return 0; } +//TODO: write a help text (iceman) 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]); @@ -340,6 +495,7 @@ int CmdLegicRfSim(const char *Cmd) { return 0; } +//TODO: write a help text (iceman) 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]); @@ -352,8 +508,37 @@ int CmdLegicRfWrite(const char *Cmd) { return 0; } +//TODO: write a help text (iceman) +int CmdLegicRfRawWrite(const char *Cmd) { + char answer; + UsbCommand c = { CMD_RAW_WRITER_LEGIC_RF, {0,0,0} }; + int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]); + if(res != 2) { + PrintAndLog("Please specify the offset and value as two hex strings"); + return -1; + } + + if (c.arg[0] == 0x05 || c.arg[0] == 0x06) { + PrintAndLog("############# DANGER !! #############"); + PrintAndLog("# changing the DCF is irreversible #"); + PrintAndLog("#####################################"); + PrintAndLog("do youe really want to continue? y(es) n(o)"); + scanf(" %c", &answer); + if (answer == 'y' || answer == 'Y') { + SendCommand(&c); + return 0; + } + return -1; + } + + clearCommandBuffer(); + SendCommand(&c); + return 0; +} + +//TODO: write a help text (iceman) int CmdLegicRfFill(const char *Cmd) { - UsbCommand cmd = {CMD_WRITER_LEGIC_RF}; + UsbCommand cmd = {CMD_WRITER_LEGIC_RF, {0,0,0} }; 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"); @@ -362,14 +547,14 @@ int CmdLegicRfFill(const char *Cmd) { 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]; - } - + memcpy(c.d.asBytes, cmd.arg[2], 48); + for(i = 0; i < 22; i++) { c.arg[0] = i*48; + + clearCommandBuffer(); SendCommand(&c); - WaitForResponse(CMD_ACK,NULL); + WaitForResponse(CMD_ACK, NULL); } clearCommandBuffer(); SendCommand(&cmd); @@ -378,16 +563,64 @@ int CmdLegicRfFill(const char *Cmd) { int CmdLegicCalcCrc8(const char *Cmd){ - int len = strlen(Cmd); - if (len & 1 ) return usage_legic_calccrc8(); + uint8_t *data; + uint8_t cmdp = 0, uidcrc = 0, type=0; + bool errors = false; + int len = 0; - uint8_t *data = malloc(len); - if ( data == NULL ) return 1; - - param_gethex(Cmd, 0, data, len ); + while(param_getchar(Cmd, cmdp) != 0x00) { + switch(param_getchar(Cmd, cmdp)) { + case 'b': + case 'B': + data = malloc(len); + if ( data == NULL ) { + PrintAndLog("Can't allocate memory. exiting"); + errors = true; + break; + } + param_gethex_ex(Cmd, cmdp+1, data, &len); + // if odd symbols, (hexbyte must be two symbols) + if ( len & 1 ) errors = true; + + 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 != NULL) free(data); + return usage_legic_calccrc8(); + } + + switch (type){ + case 16: + PrintAndLog("LEGIC CRC16: %X", CRC16Legic(data, len, uidcrc)); + break; + default: + PrintAndLog("LEGIC CRC8: %X", CRC8Legic(data, len) ); + break; + } - uint32_t checksum = CRC8Legic(data, len/2); - PrintAndLog("Bytes: %s || CRC8: %X", sprint_hex(data, len/2), checksum ); free(data); return 0; } @@ -400,6 +633,7 @@ static command_t CommandTable[] = { {"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)"}, + {"writeRaw",CmdLegicRfRawWrite, 0, "
-- Write direct to address"}, {"fill", CmdLegicRfFill, 0, " -- Fill/Write tag with constant value"}, {"crc8", CmdLegicCalcCrc8, 1, "Calculate Legic CRC8 over given hexbytes"}, {NULL, NULL, 0, NULL}