-//-----------------------------------------------------------------------------\r
-// Merlok - 2012\r
-//\r
-// This code is licensed to you under the terms of the GNU GPL, version 2 or,\r
-// at your option, any later version. See the LICENSE.txt file for the text of\r
-// the license.\r
-//-----------------------------------------------------------------------------\r
-// Routines to support mifare classic sniffer.\r
-//-----------------------------------------------------------------------------\r
-\r
-#include "mifaresniff.h"\r
-#include "apps.h"\r
-\r
-static int sniffState = SNF_INIT;\r
-static uint8_t sniffUIDType;\r
-static uint8_t sniffUID[8];\r
-static uint8_t sniffATQA[2];\r
-static uint8_t sniffSAK;\r
-static uint8_t sniffBuf[16];\r
-static int timerData = 0;\r
-\r
-\r
-int MfSniffInit(void){\r
- rsamples = 0;\r
- memset(sniffUID, 0x00, 8);\r
- memset(sniffATQA, 0x00, 2);\r
- sniffSAK = 0;\r
- sniffUIDType = SNF_UID_4;\r
-\r
- return 0;\r
-}\r
-\r
-int MfSniffEnd(void){\r
- UsbCommand ack = {CMD_ACK, {0, 0, 0}};\r
-\r
- LED_B_ON();\r
- UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));\r
- LED_B_OFF();\r
-\r
- return 0;\r
-}\r
-\r
-int RAMFUNC MfSniffLogic(const uint8_t * data, int len, int bitCnt, int reader) {\r
-\r
- if ((len == 1) && (bitCnt = 9)) { \r
- sniffState = SNF_INIT;\r
- }\r
-\r
- switch (sniffState) {\r
- case SNF_INIT:{\r
- if ((reader) && (len == 1) && (bitCnt == 9) && ((data[0] == 0x26) || (data[0] == 0x52))) { \r
- sniffUIDType = SNF_UID_4;\r
- memset(sniffUID, 0x00, 8);\r
- memset(sniffATQA, 0x00, 2);\r
- sniffSAK = 0;\r
-\r
- sniffState = SNF_WUPREQ;\r
- }\r
- break;\r
- }\r
- case SNF_WUPREQ:{\r
- if ((!reader) && (len == 2)) { \r
- memcpy(sniffATQA, data, 2);\r
-\r
- sniffState = SNF_ATQA;\r
- }\r
- break;\r
- }\r
- case SNF_ATQA:{\r
- if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20)) { \r
- sniffState = SNF_ANTICOL1;\r
- }\r
- break;\r
- }\r
- case SNF_ANTICOL1:{\r
- if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { \r
- memcpy(sniffUID + 3, data, 4);\r
- \r
- sniffState = SNF_UID1;\r
- }\r
- break;\r
- }\r
+//-----------------------------------------------------------------------------
+// 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 "proxmark3.h"
+#include "util.h"
+#include "string.h"
+#include "iso14443crc.h"
+#include "iso14443a.h"
+#include "crapto1/crapto1.h"
+#include "mifareutil.h"
+#include "common.h"
+#include "cmd.h"
+#include "BigBuf.h"
+#include "fpgaloader.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:{\r
- if ((reader) && (len == 9) && (data[0] == 0x93) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { \r
+ if ((reader) && (len == 9) && (data[0] == 0x93) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { // Select 4 Byte UID from reader\r
+ memcpy(sniffUID + 3, &data[2], 4);\r
sniffState = SNF_SAK;\r
}\r
- break;\r
- }\r
- case SNF_SAK:{\r
- if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { \r
- sniffSAK = data[0];\r
- if (sniffUID[3] == 0x88) {\r
- sniffState = SNF_ANTICOL2;\r
- } else {\r
- sniffState = SNF_CARD_IDLE;\r
- }\r
- }\r
- break;\r
- }\r
- case SNF_ANTICOL2:{\r
- if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { \r
- memcpy(sniffUID, data, 4);\r
- sniffUIDType = SNF_UID_7;\r
- \r
- sniffState = SNF_UID2;\r
- }\r
- break;\r
+ break;
}\r
+ 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;\r
+ memcpy(sniffUID, sniffUID + 4, 3);\r
+ sniffState = SNF_UID2;
+ } else { // select completed
+ sniffState = SNF_CARD_IDLE;
+ }
+ }
+ break;
+ }
case SNF_UID2:{\r
- if ((reader) && (len == 9) && (data[0] == 0x95) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { \r
+ if ((reader) && (len == 9) && (data[0] == 0x95) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) {\r
+ memcpy(sniffUID + 3, &data[2], 4);\r
sniffState = SNF_SAK;\r
- Dbprintf("SNF_SAK"); \r
}\r
break;\r
}\r
- case SNF_CARD_IDLE:{\r
- sniffBuf[0] = 0xFF;\r
- sniffBuf[1] = 0xFF;\r
- memcpy(sniffBuf + 2, sniffUID, 7);\r
- memcpy(sniffBuf + 9, sniffATQA, 2);\r
- sniffBuf[11] = sniffSAK;\r
- sniffBuf[12] = 0xFF;\r
- sniffBuf[13] = 0xFF;\r
- LogTrace(sniffBuf, 14, 0, 0, true);\r
- timerData = GetTickCount();\r
- }\r
- case SNF_CARD_CMD:{\r
- LogTrace(data, len, 0, 0, true);\r
-\r
- sniffState = SNF_CARD_RESP;\r
- timerData = GetTickCount();\r
- break;\r
- }\r
- case SNF_CARD_RESP:{\r
- LogTrace(data, len, 0, 0, false);\r
-\r
- sniffState = SNF_CARD_CMD;\r
- timerData = GetTickCount();\r
- break;\r
- }\r
- \r
- default:\r
- sniffState = SNF_INIT;\r
- break;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int RAMFUNC MfSniffSend(int maxTimeoutMs) {\r
- if (traceLen && (timerData + maxTimeoutMs < GetTickCount())) {\r
- return intMfSniffSend();\r
- }\r
- return 0;\r
-}\r
-\r
-// internal seding function. not a RAMFUNC.\r
-int intMfSniffSend() {\r
- \r
- int pckSize = 0;\r
- int pckLen = traceLen;\r
- int pckNum = 0;\r
- \r
- if (!traceLen) return 0;\r
-\r
- AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;\r
-\r
- while (pckLen > 0) {\r
- pckSize = min(32, pckLen);\r
- UsbCommand ack = {CMD_ACK, {1, pckSize, pckNum}};\r
- memcpy(ack.d.asBytes, trace + traceLen - pckLen, pckSize);\r
- \r
- LED_B_ON();\r
- UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));\r
- SpinDelay(20);\r
- LED_B_OFF();\r
-\r
- pckLen -= pckSize;\r
- pckNum++;\r
- }\r
-\r
- UsbCommand ack = {CMD_ACK, {2, 0, 0}};\r
-\r
- LED_B_ON();\r
- UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));\r
- LED_B_OFF();\r
-\r
- traceLen = 0;\r
- memset(trace, 0x44, TRACE_SIZE);\r
- \r
- return 1;\r
-}\r
+ 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;
+}
projects / proxmark3-svn / blobdiff