X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/7d5ebac99397fe7661760259377a4f222fdb92cb..ae027818ace0f74d179a1f7656b5f044cf813ee7:/armsrc/mifaresniff.c diff --git a/armsrc/mifaresniff.c b/armsrc/mifaresniff.c index 59e84697..5391e5f9 100644 --- a/armsrc/mifaresniff.c +++ b/armsrc/mifaresniff.c @@ -1,174 +1,166 @@ -//----------------------------------------------------------------------------- -// Merlok - 2012 -// -// 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. -//----------------------------------------------------------------------------- -// Routines to support mifare classic sniffer. -//----------------------------------------------------------------------------- - -#include "mifaresniff.h" -#include "apps.h" - -static int sniffState = SNF_INIT; -static uint8_t sniffUIDType; -static uint8_t sniffUID[8] = {0x00}; -static uint8_t sniffATQA[2] = {0x00}; -static uint8_t sniffSAK; -static uint8_t sniffBuf[16] = {0x00}; -static uint32_t timerData = 0; - - -bool MfSniffInit(void){ - memset(sniffUID, 0x00, 8); - memset(sniffATQA, 0x00, 2); - sniffSAK = 0; - sniffUIDType = SNF_UID_4; - - return FALSE; -} - -bool MfSniffEnd(void){ - LED_B_ON(); - cmd_send(CMD_ACK,0,0,0,0,0); - LED_B_OFF(); - - return FALSE; -} - -bool RAMFUNC MfSniffLogic(const uint8_t *data, uint16_t len, uint8_t *parity, uint16_t bitCnt, bool reader) { - - if (reader && (len == 1) && (bitCnt == 7)) { // reset on 7-Bit commands from reader - sniffState = SNF_INIT; - } - - switch (sniffState) { - case SNF_INIT:{ - if ((len == 1) && (reader) && (bitCnt == 7) ) { // REQA or WUPA from reader - sniffUIDType = SNF_UID_4; - memset(sniffUID, 0x00, 8); - memset(sniffATQA, 0x00, 2); - sniffSAK = 0; - sniffState = SNF_WUPREQ; - } - break; - } - case SNF_WUPREQ:{ - if ((!reader) && (len == 2)) { // ATQA from tag - memcpy(sniffATQA, data, 2); - sniffState = SNF_ATQA; - } - break; - } - case SNF_ATQA:{ - if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20)) { // Select ALL from reader - sniffState = SNF_ANTICOL1; - } - break; - } - case SNF_ANTICOL1:{ - if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { // UID from tag (CL1) - memcpy(sniffUID + 3, data, 4); - sniffState = SNF_UID1; - } - break; - } +//----------------------------------------------------------------------------- +// Merlok - 2012 +// +// 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. +//----------------------------------------------------------------------------- +// Routines to support mifare classic sniffer. +//----------------------------------------------------------------------------- + +#include "mifaresniff.h" +#include "apps.h" +#include "proxmark3.h" +#include "util.h" +#include "string.h" +#include "iso14443crc.h" +#include "iso14443a.h" +#include "crapto1/crapto1.h" +#include "mifareutil.h" +#include "common.h" + + +static int sniffState = SNF_INIT; +static uint8_t sniffUIDType; +static uint8_t sniffUID[8] = {0x00}; +static uint8_t sniffATQA[2] = {0x00}; +static uint8_t sniffSAK; +static uint8_t sniffBuf[16] = {0x00}; +static uint32_t timerData = 0; + + +bool MfSniffInit(void){ + memset(sniffUID, 0x00, 8); + memset(sniffATQA, 0x00, 2); + sniffSAK = 0; + sniffUIDType = SNF_UID_4; + + return false; +} + +bool MfSniffEnd(void){ + LED_B_ON(); + cmd_send(CMD_ACK,0,0,0,0,0); + LED_B_OFF(); + + return false; +} + +bool RAMFUNC MfSniffLogic(const uint8_t *data, uint16_t len, uint8_t *parity, uint16_t bitCnt, bool reader) { + + if (reader && (len == 1) && (bitCnt == 7)) { // reset on 7-Bit commands from reader + sniffState = SNF_INIT; + } + + switch (sniffState) { + case SNF_INIT:{ + if ((len == 1) && (reader) && (bitCnt == 7) ) { // REQA or WUPA from reader + sniffUIDType = SNF_UID_4; + memset(sniffUID, 0x00, 8); + memset(sniffATQA, 0x00, 2); + sniffSAK = 0; + sniffState = SNF_ATQA; + if (data[0] == 0x40) + sniffState = SNF_MAGIC_WUPC2; + } + break; + } + case SNF_MAGIC_WUPC2: + if ((len == 1) && (reader) && (data[0] == 0x43) ) { + sniffState = SNF_CARD_IDLE; + } + break; + case SNF_ATQA:{ + if ((!reader) && (len == 2)) { // ATQA from tag + memcpy(sniffATQA, data, 2); + sniffState = SNF_UID1; + } + break; + } case SNF_UID1:{ if ((reader) && (len == 9) && (data[0] == 0x93) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { // Select 4 Byte UID from reader + memcpy(sniffUID + 3, &data[2], 4); sniffState = SNF_SAK; } - break; - } - case SNF_SAK:{ - if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { // SAK from card? - sniffSAK = data[0]; - if (sniffUID[3] == 0x88) { // CL2 UID part to be expected - sniffState = SNF_ANTICOL2; - } else { // select completed - sniffState = SNF_CARD_IDLE; - } - } - break; - } - case SNF_ANTICOL2:{ - if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { // CL2 UID - memcpy(sniffUID, sniffUID+4, 3); - memcpy(sniffUID+3, data, 4); - sniffUIDType = SNF_UID_7; - sniffState = SNF_UID2; - } - break; + break; } + case SNF_SAK:{ + if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { // SAK from card? + sniffSAK = data[0]; + if ((sniffUID[3] == 0x88) && (sniffUIDType == SNF_UID_4)) { // CL2 UID part to be expected + sniffUIDType = SNF_UID_7; + memcpy(sniffUID, sniffUID + 4, 3); + sniffState = SNF_UID2; + } else { // select completed + sniffState = SNF_CARD_IDLE; + } + } + break; + } case SNF_UID2:{ - if ((reader) && (len == 9) && (data[0] == 0x95) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { // Select 2nd part of 7 Byte UID + if ((reader) && (len == 9) && (data[0] == 0x95) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { + memcpy(sniffUID + 3, &data[2], 4); sniffState = SNF_SAK; } break; } - case SNF_CARD_IDLE:{ // trace the card select sequence - sniffBuf[0] = 0xFF; - sniffBuf[1] = 0xFF; - memcpy(sniffBuf + 2, sniffUID, 7); - memcpy(sniffBuf + 9, sniffATQA, 2); - sniffBuf[11] = sniffSAK; - sniffBuf[12] = 0xFF; - sniffBuf[13] = 0xFF; - LogTrace(sniffBuf, 14, 0, 0, NULL, TRUE); - } // intentionally no break; - case SNF_CARD_CMD:{ - LogTrace(data, len, 0, 0, NULL, TRUE); - sniffState = SNF_CARD_RESP; - timerData = GetTickCount(); - break; - } - case SNF_CARD_RESP:{ - LogTrace(data, len, 0, 0, NULL, FALSE); - sniffState = SNF_CARD_CMD; - timerData = GetTickCount(); - break; - } - - default: - sniffState = SNF_INIT; - break; - } - - - return FALSE; -} - -bool RAMFUNC MfSniffSend(uint16_t maxTimeoutMs) { - if (traceLen && (GetTickCount() > timerData + maxTimeoutMs)) { - return intMfSniffSend(); - } - return FALSE; -} - -// internal sending function. not a RAMFUNC. -bool intMfSniffSend() { - - int pckSize = 0; - int pckLen = traceLen; - int pckNum = 0; - uint8_t *trace = BigBuf_get_addr(); - - FpgaDisableSscDma(); - while (pckLen > 0) { - pckSize = MIN(USB_CMD_DATA_SIZE, pckLen); - LED_B_ON(); - cmd_send(CMD_ACK, 1, traceLen, pckSize, trace + traceLen - pckLen, pckSize); - LED_B_OFF(); - - pckLen -= pckSize; - pckNum++; - } - - LED_B_ON(); - cmd_send(CMD_ACK,2,0,0,0,0); - LED_B_OFF(); - - iso14a_clear_trace(); - - return TRUE; -} + case SNF_CARD_IDLE:{ // trace the card select sequence + sniffBuf[0] = 0xFF; + sniffBuf[1] = 0xFF; + memcpy(sniffBuf + 2, sniffUID, 7); + memcpy(sniffBuf + 9, sniffATQA, 2); + sniffBuf[11] = sniffSAK; + sniffBuf[12] = 0xFF; + sniffBuf[13] = 0xFF; + LogTrace(sniffBuf, 14, 0, 0, NULL, true); + sniffState = SNF_CARD_CMD; + } // intentionally no break; + case SNF_CARD_CMD:{ + LogTrace(data, len, 0, 0, parity, reader); + timerData = GetTickCount(); + break; + } + + default: + sniffState = SNF_INIT; + break; + } + + + return false; +} + +bool RAMFUNC MfSniffSend(uint16_t maxTimeoutMs) { + if (BigBuf_get_traceLen() && (GetTickCount() > timerData + maxTimeoutMs)) { + return intMfSniffSend(); + } + return false; +} + +// internal sending function. not a RAMFUNC. +bool intMfSniffSend() { + + int pckSize = 0; + int pckLen = BigBuf_get_traceLen(); + int pckNum = 0; + uint8_t *trace = BigBuf_get_addr(); + + FpgaDisableSscDma(); + while (pckLen > 0) { + pckSize = MIN(USB_CMD_DATA_SIZE, pckLen); + LED_B_ON(); + cmd_send(CMD_ACK, 1, BigBuf_get_traceLen(), pckSize, trace + BigBuf_get_traceLen() - pckLen, pckSize); + LED_B_OFF(); + + pckLen -= pckSize; + pckNum++; + } + + LED_B_ON(); + cmd_send(CMD_ACK,2,0,0,0,0); + LED_B_OFF(); + + clear_trace(); + + return true; +}