#include "mifaresniff.h"\r
#include "apps.h"\r
\r
+static int sniffState = SNF_INIT;\r
+static uint8_t sniffUIDType = 0;\r
+static uint8_t sniffUID[10] = {0,0,0,0,0,0,0,0,0,0};\r
+static uint8_t sniffATQA[2] = {0,0};\r
+static uint8_t sniffSAK = 0;\r
+static uint8_t sniffBuf[19];\r
+static uint32_t timerData = 0;\r
\r
\r
+void MfSniffInit(void){\r
+ memset(sniffUID, 0x00, sizeof(sniffUID));\r
+ memset(sniffATQA, 0x00, sizeof(sniffATQA));\r
+ memset(sniffBuf, 0x00, sizeof(sniffBuf));\r
+ sniffSAK = 0;\r
+ sniffUIDType = SNF_UID_4;\r
+}\r
+\r
+void MfSniffEnd(void){\r
+ LED_B_ON();\r
+ cmd_send(CMD_ACK,0,0,0,0,0);\r
+ LED_B_OFF();\r
+}\r
+\r
+bool RAMFUNC MfSniffLogic(const uint8_t *data, uint16_t len, uint8_t *parity, uint16_t bitCnt, bool reader) {\r
+\r
+ // reset on 7-Bit commands from reader\r
+ if (reader && (len == 1) && (bitCnt == 7)) { \r
+ sniffState = SNF_INIT;\r
+ }\r
+\r
+ switch (sniffState) {\r
+ case SNF_INIT:{\r
+ // REQA or WUPA from reader\r
+ if ((len == 1) && (reader) && (bitCnt == 7) ) {\r
+ MfSniffInit();\r
+ sniffState = SNF_WUPREQ;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_WUPREQ:{\r
+ // ATQA from tag\r
+ if ((!reader) && (len == 2)) {\r
+ sniffATQA[0] = data[0];\r
+ sniffATQA[1] = data[1];\r
+ sniffState = SNF_ATQA;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_ATQA:{\r
+ // Select ALL from reader\r
+ if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20)) {\r
+ sniffState = SNF_ANTICOL1;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_ANTICOL1:{\r
+ // UID from tag (CL1) \r
+ if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) {\r
+ memcpy(sniffUID + 3, data, 4);\r
+ sniffState = SNF_UID1;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_UID1:{\r
+ // Select 4 Byte UID from reader\r
+ if ((reader) && (len == 9) && (data[0] == 0x93) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) {\r
+ sniffState = SNF_SAK;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_SAK:{\r
+ if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { // SAK from card?\r
+ sniffSAK = data[0];\r
+ if (sniffUID[3] == 0x88) { // CL2 UID part to be expected\r
+ sniffState = SNF_ANTICOL2;\r
+ } else { // select completed\r
+ sniffState = SNF_CARD_IDLE;\r
+ }\r
+ }\r
+ break;\r
+ }\r
+ case SNF_ANTICOL2:{\r
+ // CL2 UID \r
+ if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) {\r
+ memcpy(sniffUID, sniffUID+4, 3);\r
+ memcpy(sniffUID+3, data, 4);\r
+ sniffUIDType = SNF_UID_7;\r
+ sniffState = SNF_UID2;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_UID2:{\r
+ // Select 2nd part of 7 Byte UID\r
+ if ((reader) && (len == 9) && (data[0] == 0x95) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) {\r
+ sniffState = SNF_SAK;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_ANTICOL3:{\r
+ // CL3 UID \r
+ if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { \r
+ memcpy(sniffUID, sniffUID+4, 3);\r
+ memcpy(sniffUID+3, data, 4);\r
+ sniffUIDType = SNF_UID_10;\r
+ sniffState = SNF_UID3;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_UID3:{\r
+ // Select 3nd part of 10 Byte UID\r
+ if ((reader) && (len == 9) && (data[0] == 0x97) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) {\r
+ sniffState = SNF_SAK;\r
+ }\r
+ break;\r
+ }\r
+ case SNF_CARD_IDLE:{ // trace the card select sequence\r
+ sniffBuf[0] = 0xFF;\r
+ sniffBuf[1] = 0xFF;\r
+ memcpy(sniffBuf + 2, sniffUID, sizeof(sniffUID));\r
+ memcpy(sniffBuf + 9, sniffATQA, sizeof(sniffATQA));\r
+ sniffBuf[14] = sniffSAK;\r
+ sniffBuf[15] = 0xFF;\r
+ sniffBuf[16] = 0xFF;\r
+ LogTrace(sniffBuf, sizeof(sniffBuf), 0, 0, NULL, TRUE);\r
+ } // intentionally no break;\r
+ case SNF_CARD_CMD:{ \r
+ LogTrace(data, len, 0, 0, NULL, TRUE);\r
+ sniffState = SNF_CARD_RESP;\r
+ timerData = GetTickCount();\r
+ break;\r
+ }\r
+ case SNF_CARD_RESP:{\r
+ LogTrace(data, len, 0, 0, NULL, FALSE);\r
+ sniffState = SNF_CARD_CMD;\r
+ timerData = GetTickCount();\r
+ break;\r
+ }\r
+ default:\r
+ sniffState = SNF_INIT;\r
+ break;\r
+ }\r
+ return FALSE;\r
+}\r
+\r
+bool RAMFUNC MfSniffSend(uint16_t maxTimeoutMs) {\r
+ if (BigBuf_get_traceLen() && (GetTickCount() > timerData + maxTimeoutMs)) {\r
+ return intMfSniffSend();\r
+ }\r
+ return FALSE;\r
+}\r
+\r
+// internal sending function. not a RAMFUNC.\r
+bool intMfSniffSend() {\r
+\r
+ int pckSize = 0;\r
+ int pckLen = BigBuf_get_traceLen();\r
+ int pckNum = 0;\r
+ uint8_t *trace = BigBuf_get_addr();\r
+ \r
+ FpgaDisableSscDma();\r
+ while (pckLen > 0) {\r
+ pckSize = MIN(USB_CMD_DATA_SIZE, pckLen);\r
+ LED_B_ON();\r
+ cmd_send(CMD_ACK, 1, BigBuf_get_traceLen(), pckSize, trace + BigBuf_get_traceLen() - pckLen, pckSize);\r
+ LED_B_OFF();\r
+ pckLen -= pckSize;\r
+ pckNum++;\r
+ }\r
+\r
+ LED_B_ON();\r
+ cmd_send(CMD_ACK,2,0,0,0,0);\r
+ LED_B_OFF();\r
+\r
+ clear_trace();\r
+ return TRUE;\r
+}\r
projects / proxmark3-svn / blobdiff