X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/3b920280db306fd05322be0e70156e51dd2191f1..82885445b3be2ad153b53bcfe3c53f77e2db0dc7:/client/cmdhflegic.c diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c index f40ff963..8310da86 100644 --- a/client/cmdhflegic.c +++ b/client/cmdhflegic.c @@ -31,27 +31,38 @@ int usage_legic_calccrc8(void){ 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"); + 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 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 + uint8_t data_buf[1200]; // receiver buffer, should be 1024.. char token_type[4]; // copy data from proxmark into buffer - GetFromBigBuf(data_buf,sizeof(data_buf),0); - WaitForResponse(CMD_ACK,NULL); - + GetFromBigBuf(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); @@ -64,27 +75,27 @@ int CmdLegicDecode(const char *Cmd) { data_buf[2], data_buf[3], data_buf[4], - (calc_crc == crc) ? "OK":"Failed" + (calc_crc == crc) ? "OK":"Fail" ); - switch (data_buf[5]&0x7f) { + switch (data_buf[5] & 0x7f) { case 0x00 ... 0x2f: strncpy(token_type, "IAM",sizeof(token_type)); break; case 0x30 ... 0x6f: - strcpy(token_type, "SAM"); + strncpy(token_type, "SAM",sizeof(token_type)); break; case 0x70 ... 0x7f: - strcpy(token_type, "GAM"); + strncpy(token_type, "GAM",sizeof(token_type)); break; default: - strcpy(token_type, "???"); + strncpy(token_type, "???",sizeof(token_type)); break; } stamp_len = 0xfc - data_buf[6]; - PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u", + PrintAndLog("DCF: %02x %02x, Token Type=%s (OLE=%01u), Stamp len=%02u", data_buf[5], data_buf[6], token_type, @@ -102,73 +113,104 @@ int CmdLegicDecode(const char *Cmd) { PrintAndLog("Remaining Header Area"); PrintAndLog("%s", sprint_hex(data_buf+9, 13)); + + uint8_t segCrcBytes[8] = {0x00}; + uint32_t segCalcCRC = 0; + uint32_t segCRC = 0; + PrintAndLog("\nADF: User Area"); - + printf("-------------------------------------\n"); i = 22; - for ( n=0; n<64; n++ ) { + // 64 potential segements + // how to detect there is no segments?!? + 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; - 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", - n, + 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, - segment_len, + (segment_flag & 0x4) >> 2, + (segment_flag & 0x8) >> 3, wrp, wrc, - ((data_buf[i+3]^crc)&0x80)>>7, - (data_buf[i+4]^crc) + ((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); + + // de-xor? if not zero, assume it needs xoring. + if ( data_buf[i] > 0) { + for ( k=i; k < 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); - if ( data_buf[k] > 0) { - for (k=i; k < (wrp-wrc); k++) + // 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 < (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? + 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:"); + PrintAndLog("Remaining segment payload: (I %d | K %d | Remain LEN %d)", i, k, remain_seg_payload_len); - if ( data_buf[k] > 0 ) { - for ( k=i; k < (segment_len - wrp - 5); k++) + if ( data_buf[i] > 0 ) { + for ( k=i; k < 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; + + printf("\n-------------------------------------\n"); + // end with last segment if (segment_flag & 0x8) return 0; @@ -189,18 +231,13 @@ int CmdLegicRFRead(const char *Cmd) { } int CmdLegicLoad(const char *Cmd) { - char filename[FILE_PATH_SIZE] = {0x00}; - int len = 0; char cmdp = param_getchar(Cmd, 0); - if ( cmdp == 'H' || cmdp == 'h' || cmdp == 0x00) { - PrintAndLog("It loads datasamples from the file `filename` to device memory"); - PrintAndLog("Usage: hf legic load "); - PrintAndLog(" sample: hf legic load filename"); - return 0; - } + if ( cmdp == 'H' || cmdp == 'h' || cmdp == 0x00) return usage_legic_load(); - len = strlen(Cmd); + char filename[FILE_PATH_SIZE] = {0x00}; + int len = strlen(Cmd); + if (len > FILE_PATH_SIZE) { PrintAndLog("Filepath too long (was %s bytes), max allowed is %s ", len, FILE_PATH_SIZE); return 0; @@ -215,28 +252,59 @@ int CmdLegicLoad(const char *Cmd) { char line[80]; int offset = 0; - uint32_t data[8] = {0x00}; - + uint8_t data[USB_CMD_DATA_SIZE] = {0x00}; + int index = 0; + int totalbytes = 0; while ( fgets(line, sizeof(line), f) ) { int res = sscanf(line, "%x %x %x %x %x %x %x %x", - &data[0], &data[1], &data[2], &data[3], - &data[4], &data[5], &data[6], &data[7]); + (unsigned int *)&data[index], + (unsigned int *)&data[index + 1], + (unsigned int *)&data[index + 2], + (unsigned int *)&data[index + 3], + (unsigned int *)&data[index + 4], + (unsigned int *)&data[index + 5], + (unsigned int *)&data[index + 6], + (unsigned int *)&data[index + 7]); if(res != 8) { PrintAndLog("Error: could not read samples"); fclose(f); return -1; } - - UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}}; - memcpy(c.d.asBytes, data, 8); - clearCommandBuffer(); - SendCommand(&c); - WaitForResponse(CMD_ACK, NULL); - offset += 8; + index += res; + + if ( index == USB_CMD_DATA_SIZE ){ +// PrintAndLog("sent %d | %d | %d", index, offset, totalbytes); + UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}}; + memcpy(c.d.asBytes, data, sizeof(data)); + clearCommandBuffer(); + SendCommand(&c); + if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){ + PrintAndLog("Command execute timeout"); + fclose(f); + return 1; + } + offset += index; + totalbytes += index; + index = 0; + } } fclose(f); - PrintAndLog("loaded %u samples", offset); + + // left over bytes? + if ( index != 0 ) { + UsbCommand c = { CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}}; + memcpy(c.d.asBytes, data, 8); + clearCommandBuffer(); + SendCommand(&c); + if ( !WaitForResponseTimeout(CMD_ACK, NULL, 1500)){ + PrintAndLog("Command execute timeout"); + return 1; + } + totalbytes += index; + } + + PrintAndLog("loaded %u samples", totalbytes); return 0; } @@ -270,19 +338,16 @@ int CmdLegicSave(const char *Cmd) { return -1; } - GetFromBigBuf(got,requested,offset); - WaitForResponse(CMD_ACK,NULL); + GetFromBigBuf(got, requested, offset); + if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){ + PrintAndLog("Command execute timeout"); + return 1; + } for (int j = 0; j < requested; j += 8) { fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n", - got[j+0], - got[j+1], - got[j+2], - got[j+3], - got[j+4], - got[j+5], - got[j+6], - got[j+7] + got[j+0], got[j+1], got[j+2], got[j+3], + got[j+4], got[j+5], got[j+6], got[j+7] ); delivered += 8; if (delivered >= requested) break; @@ -293,6 +358,7 @@ 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]); @@ -301,6 +367,7 @@ 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]); @@ -337,7 +404,6 @@ int CmdLegicRfFill(const char *Cmd) { return 0; } - int CmdLegicCalcCrc8(const char *Cmd){ int len = strlen(Cmd);