]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - client/mifarehost.c
Added library to read card info, made use of it from within mfkeys.lua script
[proxmark3-svn] / client / mifarehost.c
index 529c248d9604a9c9d8fcee815aab7e17f476d564..9676e6f7a63e28fe2ae64a196947220d2ed00861 100644 (file)
@@ -1,19 +1,20 @@
-// Merlok, 2011\r
+// Merlok, 2011, 2012\r
 // people from mifare@nethemba.com, 2010\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
 // people from mifare@nethemba.com, 2010\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
-// High frequency ISO14443A commands\r
+// mifare commands\r
 //-----------------------------------------------------------------------------\r
 \r
 #include <stdio.h>\r
 #include <stdlib.h> \r
 #include <string.h>\r
 #include "mifarehost.h"\r
 //-----------------------------------------------------------------------------\r
 \r
 #include <stdio.h>\r
 #include <stdlib.h> \r
 #include <string.h>\r
 #include "mifarehost.h"\r
+#include "proxmark3.h"\r
 \r
 \r
-\r
+// MIFARE\r
 int compar_int(const void * a, const void * b) {\r
        return (*(uint64_t*)b - *(uint64_t*)a);\r
 }\r
 int compar_int(const void * a, const void * b) {\r
        return (*(uint64_t*)b - *(uint64_t*)a);\r
 }\r
@@ -58,12 +59,12 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo
        fnVector * vector = NULL;\r
        countKeys       *ck;\r
        int lenVector = 0;\r
        fnVector * vector = NULL;\r
        countKeys       *ck;\r
        int lenVector = 0;\r
-       UsbCommand * resp = NULL;\r
+       UsbCommand resp;\r
        \r
        memset(resultKeys, 0x00, 16 * 6);\r
 \r
        // flush queue\r
        \r
        memset(resultKeys, 0x00, 16 * 6);\r
 \r
        // flush queue\r
-       while (WaitForResponseTimeout(CMD_ACK, 500) != NULL) ;\r
+       WaitForResponseTimeout(CMD_ACK,NULL,100);\r
        \r
   UsbCommand c = {CMD_MIFARE_NESTED, {blockNo, keyType, trgBlockNo + trgKeyType * 0x100}};\r
        memcpy(c.d.asBytes, key, 6);\r
        \r
   UsbCommand c = {CMD_MIFARE_NESTED, {blockNo, keyType, trgBlockNo + trgKeyType * 0x100}};\r
        memcpy(c.d.asBytes, key, 6);\r
@@ -80,18 +81,16 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo
                        break;\r
                }\r
 \r
                        break;\r
                }\r
 \r
-               resp = WaitForResponseTimeout(CMD_ACK, 1500);\r
-\r
-               if (resp != NULL) {\r
-                       isEOF  = resp->arg[0] & 0xff;\r
+               if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
+                       isEOF  = resp.arg[0] & 0xff;\r
 \r
                        if (isEOF) break;\r
                        \r
 \r
                        if (isEOF) break;\r
                        \r
-                       len = resp->arg[1] & 0xff;\r
+                       len = resp.arg[1] & 0xff;\r
                        if (len == 0) continue;\r
                        \r
                        if (len == 0) continue;\r
                        \r
-                       memcpy(&uid, resp->d.asBytes, 4); \r
-                       PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, resp->arg[2] & 0xff, (resp->arg[2] >> 8) & 0xff);\r
+                       memcpy(&uid, resp.d.asBytes, 4);\r
+                       PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, resp.arg[2] & 0xff, (resp.arg[2] >> 8) & 0xff);\r
                        vector = (fnVector *) realloc((void *)vector, (lenVector + len) * sizeof(fnVector) + 200);\r
                        if (vector == NULL) {\r
                                PrintAndLog("Memory allocation error for fnVector. len: %d bytes: %d", lenVector + len, (lenVector + len) * sizeof(fnVector)); \r
                        vector = (fnVector *) realloc((void *)vector, (lenVector + len) * sizeof(fnVector) + 200);\r
                        if (vector == NULL) {\r
                                PrintAndLog("Memory allocation error for fnVector. len: %d bytes: %d", lenVector + len, (lenVector + len) * sizeof(fnVector)); \r
@@ -99,12 +98,12 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo
                        }\r
                        \r
                        for (i = 0; i < len; i++) {\r
                        }\r
                        \r
                        for (i = 0; i < len; i++) {\r
-                               vector[lenVector + i].blockNo = resp->arg[2] & 0xff;\r
-                               vector[lenVector + i].keyType = (resp->arg[2] >> 8) & 0xff;\r
+                               vector[lenVector + i].blockNo = resp.arg[2] & 0xff;\r
+                               vector[lenVector + i].keyType = (resp.arg[2] >> 8) & 0xff;\r
                                vector[lenVector + i].uid = uid;\r
 \r
                                vector[lenVector + i].uid = uid;\r
 \r
-                               memcpy(&vector[lenVector + i].nt,  (void *)(resp->d.asBytes + 8 + i * 8 + 0), 4);\r
-                               memcpy(&vector[lenVector + i].ks1, (void *)(resp->d.asBytes + 8 + i * 8 + 4), 4);\r
+                               memcpy(&vector[lenVector + i].nt,  (void *)(resp.d.asBytes + 8 + i * 8 + 0), 4);\r
+                               memcpy(&vector[lenVector + i].ks1, (void *)(resp.d.asBytes + 8 + i * 8 + 4), 4);\r
                        }\r
 \r
                        lenVector += len;\r
                        }\r
 \r
                        lenVector += len;\r
@@ -186,53 +185,78 @@ int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * key
 \r
   UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};\r
        memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
 \r
   UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};\r
        memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
-\r
   SendCommand(&c);\r
 \r
   SendCommand(&c);\r
 \r
-       UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 3000);\r
-\r
-       if (resp == NULL) return 1;\r
-       if ((resp->arg[0] & 0xff) != 0x01) return 2;\r
-       *key = bytes_to_num(resp->d.asBytes, 6);\r
+       UsbCommand resp;\r
+       if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;\r
+       if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
+       *key = bytes_to_num(resp.d.asBytes, 6);\r
        return 0;\r
 }\r
 \r
        return 0;\r
 }\r
 \r
-int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
-  UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
\r
-  SendCommand(&c);\r
+// EMULATOR\r
 \r
 \r
-       UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500);\r
+int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
+       UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
+       SendCommand(&c);\r
 \r
 \r
-       if (resp == NULL) return 1;\r
-       memcpy(data, resp->d.asBytes, blocksCount * 16); \r
+  UsbCommand resp;\r
+       if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\r
+       memcpy(data, resp.d.asBytes, blocksCount * 16);\r
        return 0;\r
 }\r
 \r
 int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
        return 0;\r
 }\r
 \r
 int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {\r
-  UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r
+       UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r
        memcpy(c.d.asBytes, data, blocksCount * 16); \r
        memcpy(c.d.asBytes, data, blocksCount * 16); \r
-  SendCommand(&c);\r
+       SendCommand(&c);\r
        return 0;\r
 }\r
 \r
        return 0;\r
 }\r
 \r
+// "MAGIC" CARD\r
+\r
 int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) {\r
 int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) {\r
-       uint8_t isOK = 0;\r
        uint8_t block0[16];\r
        memset(block0, 0, 16);\r
        memcpy(block0, uid, 4); \r
        block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // Mifare UID BCC\r
        uint8_t block0[16];\r
        memset(block0, 0, 16);\r
        memcpy(block0, uid, 4); \r
        block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // Mifare UID BCC\r
+       // mifare classic SAK(byte 5) and ATQA(byte 6 and 7)\r
+       block0[5] = 0x88;\r
+       block0[6] = 0x04;\r
+       block0[7] = 0x00;\r
+       \r
+       return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);\r
+}\r
 \r
 \r
-  UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, 1, 0}};\r
-       memcpy(c.d.asBytes, block0, 16); \r
-  SendCommand(&c);\r
+int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, int wantWipe, uint8_t params) {\r
+       uint8_t isOK = 0;\r
+\r
+       UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r
+       memcpy(c.d.asBytes, data, 16); \r
+       SendCommand(&c);\r
+\r
+  UsbCommand resp;\r
+       if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
+               isOK  = resp.arg[0] & 0xff;\r
+               if (uid != NULL) memcpy(uid, resp.d.asBytes, 4);\r
+               if (!isOK) return 2;\r
+       } else {\r
+               PrintAndLog("Command execute timeout");\r
+               return 1;\r
+       }\r
+       return 0;\r
+}\r
+\r
+int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
+       uint8_t isOK = 0;\r
 \r
 \r
-       UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500);\r
+       UsbCommand c = {CMD_MIFARE_EML_CGETBLOCK, {params, 0, blockNo}};\r
+       SendCommand(&c);\r
 \r
 \r
-       if (resp != NULL) {\r
-               isOK  = resp->arg[0] & 0xff;\r
-               PrintAndLog("isOk:%02x", isOK);\r
-               memcpy(oldUID, resp->d.asBytes, 4); \r
+  UsbCommand resp;\r
+       if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
+               isOK  = resp.arg[0] & 0xff;\r
+               memcpy(data, resp.d.asBytes, 16);\r
                if (!isOK) return 2;\r
        } else {\r
                PrintAndLog("Command execute timeout");\r
                if (!isOK) return 2;\r
        } else {\r
                PrintAndLog("Command execute timeout");\r
@@ -240,3 +264,331 @@ int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) {
        }\r
        return 0;\r
 }\r
        }\r
        return 0;\r
 }\r
+\r
+// SNIFFER\r
+\r
+// constants\r
+static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
+\r
+// variables\r
+char logHexFileName[200] = {0x00};\r
+static uint8_t traceCard[4096] = {0x00};\r
+static char traceFileName[20];\r
+static int traceState = TRACE_IDLE;\r
+static uint8_t traceCurBlock = 0;\r
+static uint8_t traceCurKey = 0;\r
+\r
+struct Crypto1State *traceCrypto1 = NULL;\r
+\r
+struct Crypto1State *revstate;\r
+uint64_t lfsr;\r
+uint32_t ks2;\r
+uint32_t ks3;\r
+\r
+uint32_t uid;     // serial number\r
+uint32_t nt;      // tag challenge\r
+uint32_t nt_par; \r
+uint32_t nr_enc;  // encrypted reader challenge\r
+uint32_t ar_enc;  // encrypted reader response\r
+uint32_t nr_ar_par; \r
+uint32_t at_enc;  // encrypted tag response\r
+uint32_t at_par; \r
+\r
+int isTraceCardEmpty(void) {\r
+       return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
+}\r
+\r
+int isBlockEmpty(int blockN) {\r
+       for (int i = 0; i < 16; i++) \r
+               if (traceCard[blockN * 16 + i] != 0) return 0;\r
+\r
+       return 1;\r
+}\r
+\r
+int isBlockTrailer(int blockN) {\r
+ return ((blockN & 0x03) == 0x03);\r
+}\r
+\r
+int loadTraceCard(uint8_t *tuid) {\r
+       FILE * f;\r
+       char buf[64];\r
+       uint8_t buf8[64];\r
+       int i, blockNum;\r
+       \r
+       if (!isTraceCardEmpty()) saveTraceCard();\r
+       memset(traceCard, 0x00, 4096);\r
+       memcpy(traceCard, tuid + 3, 4);\r
+       FillFileNameByUID(traceFileName, tuid, ".eml", 7);\r
+\r
+       f = fopen(traceFileName, "r");\r
+       if (!f) return 1;\r
+       \r
+       blockNum = 0;\r
+       while(!feof(f)){\r
+               memset(buf, 0, sizeof(buf));\r
+               if (fgets(buf, sizeof(buf), f) == NULL) {\r
+      PrintAndLog("File reading error.");\r
+                       return 2;\r
+    }\r
+\r
+               if (strlen(buf) < 32){\r
+                       if (feof(f)) break;\r
+                       PrintAndLog("File content error. Block data must include 32 HEX symbols");\r
+                       return 2;\r
+               }\r
+               for (i = 0; i < 32; i += 2)\r
+                       sscanf(&buf[i], "%02x", (unsigned int *)&buf8[i / 2]);\r
+\r
+               memcpy(traceCard + blockNum * 16, buf8, 16);\r
+\r
+               blockNum++;\r
+       }\r
+       fclose(f);\r
+\r
+       return 0;\r
+}\r
+\r
+int saveTraceCard(void) {\r
+       FILE * f;\r
+       \r
+       if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
+       \r
+       f = fopen(traceFileName, "w+");\r
+       for (int i = 0; i < 64; i++) {  // blocks\r
+               for (int j = 0; j < 16; j++)  // bytes\r
+                       fprintf(f, "%02x", *(traceCard + i * 16 + j)); \r
+               fprintf(f,"\n");\r
+       }\r
+       fclose(f);\r
+\r
+       return 0;\r
+}\r
+\r
+int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r
+\r
+       if (traceCrypto1) crypto1_destroy(traceCrypto1);\r
+       traceCrypto1 = NULL;\r
+\r
+       if (wantSaveToEmlFile) loadTraceCard(tuid);\r
+       traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];\r
+       traceCard[5] = sak;\r
+       memcpy(&traceCard[6], atqa, 2);\r
+       traceCurBlock = 0;\r
+       uid = bytes_to_num(tuid + 3, 4);\r
+       \r
+       traceState = TRACE_IDLE;\r
+\r
+       return 0;\r
+}\r
+\r
+void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool isEncrypted){\r
+       uint8_t bt = 0;\r
+       int i;\r
+       \r
+       if (len != 1) {\r
+               for (i = 0; i < len; i++)\r
+                       data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r
+       } else {\r
+               bt = 0;\r
+               for (i = 0; i < 4; i++)\r
+                       bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], i)) << i;\r
+                               \r
+               data[0] = bt;\r
+       }\r
+       return;\r
+}\r
+\r
+\r
+int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEmlFile) {\r
+       uint8_t data[64];\r
+\r
+       if (traceState == TRACE_ERROR) return 1;\r
+       if (len > 64) {\r
+               traceState = TRACE_ERROR;\r
+               return 1;\r
+       }\r
+       \r
+       memcpy(data, data_src, len);\r
+       if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r
+               mf_crypto1_decrypt(traceCrypto1, data, len, 0);\r
+               PrintAndLog("dec> %s", sprint_hex(data, len));\r
+               AddLogHex(logHexFileName, "dec> ", data, len); \r
+       }\r
+       \r
+       switch (traceState) {\r
+       case TRACE_IDLE: \r
+               // check packet crc16!\r
+               if ((len >= 4) && (!CheckCrc14443(CRC_14443_A, data, len))) {\r
+                       PrintAndLog("dec> CRC ERROR!!!");\r
+                       AddLogLine(logHexFileName, "dec> ", "CRC ERROR!!!"); \r
+                       traceState = TRACE_ERROR;  // do not decrypt the next commands\r
+                       return 1;\r
+               }\r
+               \r
+               // AUTHENTICATION\r
+               if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {\r
+                       traceState = TRACE_AUTH1;\r
+                       traceCurBlock = data[1];\r
+                       traceCurKey = data[0] == 60 ? 1:0;\r
+                       return 0;\r
+               }\r
+\r
+               // READ\r
+               if ((len ==4) && ((data[0] == 0x30))) {\r
+                       traceState = TRACE_READ_DATA;\r
+                       traceCurBlock = data[1];\r
+                       return 0;\r
+               }\r
+\r
+               // WRITE\r
+               if ((len ==4) && ((data[0] == 0xA0))) {\r
+                       traceState = TRACE_WRITE_OK;\r
+                       traceCurBlock = data[1];\r
+                       return 0;\r
+               }\r
+\r
+               // HALT\r
+               if ((len ==4) && ((data[0] == 0x50) && (data[1] == 0x00))) {\r
+                       traceState = TRACE_ERROR;  // do not decrypt the next commands\r
+                       return 0;\r
+               }\r
+               \r
+               return 0;\r
+       break;\r
+       \r
+       case TRACE_READ_DATA: \r
+               if (len == 18) {\r
+                       traceState = TRACE_IDLE;\r
+\r
+                       if (isBlockTrailer(traceCurBlock)) {\r
+                               memcpy(traceCard + traceCurBlock * 16 + 6, data + 6, 4);\r
+                       } else {\r
+                               memcpy(traceCard + traceCurBlock * 16, data, 16);\r
+                       }\r
+                       if (wantSaveToEmlFile) saveTraceCard();\r
+                       return 0;\r
+               } else {\r
+                       traceState = TRACE_ERROR;\r
+                       return 1;\r
+               }\r
+       break;\r
+\r
+       case TRACE_WRITE_OK: \r
+               if ((len == 1) && (data[0] = 0x0a)) {\r
+                       traceState = TRACE_WRITE_DATA;\r
+\r
+                       return 0;\r
+               } else {\r
+                       traceState = TRACE_ERROR;\r
+                       return 1;\r
+               }\r
+       break;\r
+\r
+       case TRACE_WRITE_DATA: \r
+               if (len == 18) {\r
+                       traceState = TRACE_IDLE;\r
+\r
+                       memcpy(traceCard + traceCurBlock * 16, data, 16);\r
+                       if (wantSaveToEmlFile) saveTraceCard();\r
+                       return 0;\r
+               } else {\r
+                       traceState = TRACE_ERROR;\r
+                       return 1;\r
+               }\r
+       break;\r
+\r
+       case TRACE_AUTH1: \r
+               if (len == 4) {\r
+                       traceState = TRACE_AUTH2;\r
+\r
+                       nt = bytes_to_num(data, 4);\r
+                       nt_par = parity;\r
+                       return 0;\r
+               } else {\r
+                       traceState = TRACE_ERROR;\r
+                       return 1;\r
+               }\r
+       break;\r
+\r
+       case TRACE_AUTH2: \r
+               if (len == 8) {\r
+                       traceState = TRACE_AUTH_OK;\r
+\r
+                       nr_enc = bytes_to_num(data, 4);\r
+                       ar_enc = bytes_to_num(data + 4, 4);\r
+                       nr_ar_par = parity;\r
+                       return 0;\r
+               } else {\r
+                       traceState = TRACE_ERROR;\r
+                       return 1;\r
+               }\r
+       break;\r
+\r
+       case TRACE_AUTH_OK: \r
+               if (len ==4) {\r
+                       traceState = TRACE_IDLE;\r
+\r
+                       at_enc = bytes_to_num(data, 4);\r
+                       at_par = parity;\r
+                       \r
+                       //  decode key here)\r
+                       if (!traceCrypto1) {\r
+                               ks2 = ar_enc ^ prng_successor(nt, 64);\r
+                               ks3 = at_enc ^ prng_successor(nt, 96);\r
+                               revstate = lfsr_recovery64(ks2, ks3);\r
+                               lfsr_rollback_word(revstate, 0, 0);\r
+                               lfsr_rollback_word(revstate, 0, 0);\r
+                               lfsr_rollback_word(revstate, nr_enc, 1);\r
+                               lfsr_rollback_word(revstate, uid ^ nt, 0);\r
+                       }else{\r
+                               ks2 = ar_enc ^ prng_successor(nt, 64);\r
+                               ks3 = at_enc ^ prng_successor(nt, 96);\r
+                               revstate = lfsr_recovery64(ks2, ks3);\r
+                               lfsr_rollback_word(revstate, 0, 0);\r
+                               lfsr_rollback_word(revstate, 0, 0);\r
+                               lfsr_rollback_word(revstate, nr_enc, 1);\r
+                               lfsr_rollback_word(revstate, uid ^ nt, 0);\r
+                       }\r
+                       crypto1_get_lfsr(revstate, &lfsr);\r
+                       printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));\r
+                       AddLogUint64(logHexFileName, "key> ", lfsr); \r
+                       \r
+                       int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r
+                       if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r
+                       \r
+                       if (traceCurKey) {\r
+                               num_to_bytes(lfsr, 6, traceCard + blockShift + 10);\r
+                       } else {\r
+                               num_to_bytes(lfsr, 6, traceCard + blockShift);\r
+                       }\r
+                       if (wantSaveToEmlFile) saveTraceCard();\r
+\r
+                       if (traceCrypto1) {\r
+                               crypto1_destroy(traceCrypto1);\r
+                       }\r
+                       \r
+                       // set cryptosystem state\r
+                       traceCrypto1 = lfsr_recovery64(ks2, ks3);\r
+                       \r
+//     nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt;\r
+\r
+       /*      traceCrypto1 = crypto1_create(lfsr); // key in lfsr\r
+               crypto1_word(traceCrypto1, nt ^ uid, 0);\r
+               crypto1_word(traceCrypto1, ar, 1);\r
+               crypto1_word(traceCrypto1, 0, 0);\r
+               crypto1_word(traceCrypto1, 0, 0);*/\r
+       \r
+                       return 0;\r
+               } else {\r
+                       traceState = TRACE_ERROR;\r
+                       return 1;\r
+               }\r
+       break;\r
+\r
+       default: \r
+               traceState = TRACE_ERROR;\r
+               return 1;\r
+       }\r
+\r
+       return 0;\r
+}\r
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