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[proxmark3-svn] / client / mifarehost.c
diff --git a/client/mifarehost.c b/client/mifarehost.c
index fe8b8b2682a3d28b46bd469a369c1c6303c93e07..5d39221f161f423ee6bd39cfb96f836d7ab69df0 100644 (file)
--- a/client/mifarehost.c
+++ b/client/mifarehost.c
@@ -8,131 +8,97 @@
 // mifare commands\r
 //-----------------------------------------------------------------------------\r
 \r
 // mifare commands\r
 //-----------------------------------------------------------------------------\r
 \r
-#include <stdio.h>\r
-#include <stdlib.h> \r
-#include <string.h>\r
-#include <pthread.h>\r
 #include "mifarehost.h"\r
 #include "mifarehost.h"\r
-#include "proxmark3.h"\r
 \r
 // MIFARE\r
 \r
 // MIFARE\r
-int compar_int(const void * a, const void * b) {\r
+extern int compar_int(const void * a, const void * b) {\r
        // didn't work: (the result is truncated to 32 bits)\r
        //return (*(uint64_t*)b - *(uint64_t*)a);\r
 \r
        // better:\r
        // didn't work: (the result is truncated to 32 bits)\r
        //return (*(uint64_t*)b - *(uint64_t*)a);\r
 \r
        // better:\r
-       if (*(uint64_t*)b == *(uint64_t*)a) return 0;\r
-       else if (*(uint64_t*)b > *(uint64_t*)a) return 1;\r
-       else return -1;\r
-}\r
-\r
+       if (*(uint64_t*)b > *(uint64_t*)a) return 1;\r
+       if (*(uint64_t*)b < *(uint64_t*)a) return -1;   \r
+       return 0;\r
 \r
 \r
+       //return (*(uint64_t*)b > *(uint64_t*)a) - (*(uint64_t*)b < *(uint64_t*)a);\r
+}\r
 \r
 // Compare 16 Bits out of cryptostate\r
 int Compare16Bits(const void * a, const void * b) {\r
 \r
 // Compare 16 Bits out of cryptostate\r
 int Compare16Bits(const void * a, const void * b) {\r
-       if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;\r
-       else if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;\r
-       else return -1;\r
+        if ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000)) return 1;     \r
+        if ((*(uint64_t*)b & 0x00ff000000ff0000) < (*(uint64_t*)a & 0x00ff000000ff0000)) return -1;\r
+        return 0;\r
+\r
+/*     return \r
+               ((*(uint64_t*)b & 0x00ff000000ff0000) > (*(uint64_t*)a & 0x00ff000000ff0000))\r
+               -\r
+               ((*(uint64_t*)b & 0x00ff000000ff0000) < (*(uint64_t*)a & 0x00ff000000ff0000))\r
+               ;\r
+*/\r
 }\r
 \r
 }\r
 \r
-\r
-typedef \r
-       struct {\r
-               union {\r
-                       struct Crypto1State *slhead;\r
-                       uint64_t *keyhead;\r
-               } head;\r
-               union {\r
-                       struct Crypto1State *sltail;\r
-                       uint64_t *keytail;\r
-               } tail;\r
-               uint32_t len;\r
-               uint32_t uid;\r
-               uint32_t blockNo;\r
-               uint32_t keyType;\r
-               uint32_t nt;\r
-               uint32_t ks1;\r
-       } StateList_t;\r
-\r
-\r
 // wrapper function for multi-threaded lfsr_recovery32\r
 void* nested_worker_thread(void *arg)\r
 {\r
        struct Crypto1State *p1;\r
        StateList_t *statelist = arg;\r
 // wrapper function for multi-threaded lfsr_recovery32\r
 void* nested_worker_thread(void *arg)\r
 {\r
        struct Crypto1State *p1;\r
        StateList_t *statelist = arg;\r
-\r
-       statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);\r
+       statelist->head.slhead = lfsr_recovery32(statelist->ks1, statelist->nt ^ statelist->uid);       \r
+       \r
        for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r
        for (p1 = statelist->head.slhead; *(uint64_t *)p1 != 0; p1++);\r
+       \r
        statelist->len = p1 - statelist->head.slhead;\r
        statelist->tail.sltail = --p1;\r
        qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r
        statelist->len = p1 - statelist->head.slhead;\r
        statelist->tail.sltail = --p1;\r
        qsort(statelist->head.slhead, statelist->len, sizeof(uint64_t), Compare16Bits);\r
-       \r
        return statelist->head.slhead;\r
 }\r
 \r
        return statelist->head.slhead;\r
 }\r
 \r
-\r
-\r
-\r
 int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate) \r
 {\r
 int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate) \r
 {\r
-       uint16_t i, len;\r
+       uint16_t i;\r
        uint32_t uid;\r
        UsbCommand resp;\r
        uint32_t uid;\r
        UsbCommand resp;\r
-\r
-       \r
        StateList_t statelists[2];\r
        struct Crypto1State *p1, *p2, *p3, *p4;\r
        \r
        StateList_t statelists[2];\r
        struct Crypto1State *p1, *p2, *p3, *p4;\r
        \r
-       // flush queue\r
-       WaitForResponseTimeout(CMD_ACK,NULL,100);\r
-       \r
        UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r
        memcpy(c.d.asBytes, key, 6);\r
        UsbCommand c = {CMD_MIFARE_NESTED, {blockNo + keyType * 0x100, trgBlockNo + trgKeyType * 0x100, calibrate}};\r
        memcpy(c.d.asBytes, key, 6);\r
+       clearCommandBuffer();\r
        SendCommand(&c);\r
        SendCommand(&c);\r
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) return -1;\r
 \r
 \r
-       if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
-               len = resp.arg[1];\r
-               if (len == 2) { \r
-                       memcpy(&uid, resp.d.asBytes, 4);\r
-                       PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);\r
-                       \r
-                       for (i = 0; i < 2; i++) {\r
-                               statelists[i].blockNo = resp.arg[2] & 0xff;\r
-                               statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r
-                               statelists[i].uid = uid;\r
-\r
-                               memcpy(&statelists[i].nt,  (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r
-                               memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r
-                       }\r
-               }\r
-               else {\r
-                       PrintAndLog("Got 0 keys from proxmark."); \r
-                       return 1;\r
-               }\r
-       }\r
+       // error during nested\r
+       if (resp.arg[0]) return resp.arg[0];\r
        \r
        \r
-       // calc keys\r
+       memcpy(&uid, resp.d.asBytes, 4);\r
+               \r
+       for (i = 0; i < 2; i++) {\r
+               statelists[i].blockNo = resp.arg[2] & 0xff;\r
+               statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;\r
+               statelists[i].uid = uid;\r
+               memcpy(&statelists[i].nt,  (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);\r
+               memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);\r
+       }\r
        \r
        \r
+       // calc keys    \r
        pthread_t thread_id[2];\r
                \r
        // create and run worker threads\r
        pthread_t thread_id[2];\r
                \r
        // create and run worker threads\r
-       for (i = 0; i < 2; i++) {\r
+       for (i = 0; i < 2; i++)\r
                pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r
                pthread_create(thread_id + i, NULL, nested_worker_thread, &statelists[i]);\r
-       }\r
-       \r
+\r
        // wait for threads to terminate:\r
        // wait for threads to terminate:\r
-       for (i = 0; i < 2; i++) {\r
+       for (i = 0; i < 2; i++)\r
                pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r
                pthread_join(thread_id[i], (void*)&statelists[i].head.slhead);\r
-       }\r
-\r
 \r
        // the first 16 Bits of the cryptostate already contain part of our key.\r
        // Create the intersection of the two lists based on these 16 Bits and\r
        // roll back the cryptostate\r
        p1 = p3 = statelists[0].head.slhead; \r
        p2 = p4 = statelists[1].head.slhead;\r
 \r
        // the first 16 Bits of the cryptostate already contain part of our key.\r
        // Create the intersection of the two lists based on these 16 Bits and\r
        // roll back the cryptostate\r
        p1 = p3 = statelists[0].head.slhead; \r
        p2 = p4 = statelists[1].head.slhead;\r
+\r
        while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r
                if (Compare16Bits(p1, p2) == 0) {\r
        while (p1 <= statelists[0].tail.sltail && p2 <= statelists[1].tail.sltail) {\r
                if (Compare16Bits(p1, p2) == 0) {\r
+                       \r
                        struct Crypto1State savestate, *savep = &savestate;\r
                        savestate = *p1;\r
                        while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r
                        struct Crypto1State savestate, *savep = &savestate;\r
                        savestate = *p1;\r
                        while(Compare16Bits(p1, savep) == 0 && p1 <= statelists[0].tail.sltail) {\r
@@ -154,21 +120,23 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo
                        while (Compare16Bits(p1, p2) == 1) p2++;\r
                }\r
        }\r
                        while (Compare16Bits(p1, p2) == 1) p2++;\r
                }\r
        }\r
+\r
        p3->even = 0; p3->odd = 0;\r
        p4->even = 0; p4->odd = 0;\r
        statelists[0].len = p3 - statelists[0].head.slhead;\r
        statelists[1].len = p4 - statelists[1].head.slhead;\r
        p3->even = 0; p3->odd = 0;\r
        p4->even = 0; p4->odd = 0;\r
        statelists[0].len = p3 - statelists[0].head.slhead;\r
        statelists[1].len = p4 - statelists[1].head.slhead;\r
-       statelists[0].tail.sltail=--p3;\r
-       statelists[1].tail.sltail=--p4;\r
+       statelists[0].tail.sltail = --p3;\r
+       statelists[1].tail.sltail = --p4;\r
 \r
        // the statelists now contain possible keys. The key we are searching for must be in the\r
        // intersection of both lists. Create the intersection:\r
        qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compar_int);\r
        qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compar_int);\r
 \r
        // the statelists now contain possible keys. The key we are searching for must be in the\r
        // intersection of both lists. Create the intersection:\r
        qsort(statelists[0].head.keyhead, statelists[0].len, sizeof(uint64_t), compar_int);\r
        qsort(statelists[1].head.keyhead, statelists[1].len, sizeof(uint64_t), compar_int);\r
-\r
+       \r
        uint64_t *p5, *p6, *p7;\r
        p5 = p7 = statelists[0].head.keyhead; \r
        p6 = statelists[1].head.keyhead;\r
        uint64_t *p5, *p6, *p7;\r
        p5 = p7 = statelists[0].head.keyhead; \r
        p6 = statelists[1].head.keyhead;\r
+       \r
        while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) {\r
                if (compar_int(p5, p6) == 0) {\r
                        *p7++ = *p5++;\r
        while (p5 <= statelists[0].tail.keytail && p6 <= statelists[1].tail.keytail) {\r
                if (compar_int(p5, p6) == 0) {\r
                        *p7++ = *p5++;\r
@@ -180,89 +148,181 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo
                }\r
        }\r
        statelists[0].len = p7 - statelists[0].head.keyhead;\r
                }\r
        }\r
        statelists[0].len = p7 - statelists[0].head.keyhead;\r
-       statelists[0].tail.keytail=--p7;\r
+       statelists[0].tail.keytail = --p7;\r
 \r
 \r
+       uint32_t numOfCandidates = statelists[0].len;\r
+       if ( numOfCandidates == 0 ) goto out;\r
+       \r
        memset(resultKey, 0, 6);\r
        memset(resultKey, 0, 6);\r
+       uint64_t key64 = 0;\r
+\r
        // The list may still contain several key candidates. Test each of them with mfCheckKeys\r
        // The list may still contain several key candidates. Test each of them with mfCheckKeys\r
-       for (i = 0; i < statelists[0].len; i++) {\r
-               uint8_t keyBlock[6];\r
-               uint64_t key64;\r
+       // uint32_t max_keys = keycnt > (USB_CMD_DATA_SIZE/6) ? (USB_CMD_DATA_SIZE/6) : keycnt;\r
+       uint8_t keyBlock[USB_CMD_DATA_SIZE] = {0x00};\r
+\r
+       for (i = 0; i < numOfCandidates; ++i){\r
                crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r
                crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);\r
-               num_to_bytes(key64, 6, keyBlock);\r
-               key64 = 0;\r
-               if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, 1, keyBlock, &key64)) {\r
-                       num_to_bytes(key64, 6, resultKey);\r
-                       break;\r
-               }\r
+               num_to_bytes(key64, 6, keyBlock + i * 6);\r
+       }\r
+\r
+       if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, numOfCandidates, keyBlock, &key64)) {             \r
+               free(statelists[0].head.slhead);\r
+               free(statelists[1].head.slhead);\r
+               num_to_bytes(key64, 6, resultKey);\r
+\r
+               PrintAndLog("UID: %08x target block:%3u key type: %c  -- Found key [%012" PRIx64 "]",\r
+                       uid,\r
+                       (uint16_t)resp.arg[2] & 0xff,\r
+                       (resp.arg[2] >> 8) ? 'B' : 'A',\r
+                       key64\r
+               );\r
+               return -5;\r
        }\r
        \r
        }\r
        \r
+out:\r
+       PrintAndLog("UID: %08x target block:%3u key type: %c",\r
+                       uid,\r
+                       (uint16_t)resp.arg[2] & 0xff,\r
+                       (resp.arg[2] >> 8) ? 'B' : 'A'\r
+       );      \r
+\r
        free(statelists[0].head.slhead);\r
        free(statelists[1].head.slhead);\r
        free(statelists[0].head.slhead);\r
        free(statelists[1].head.slhead);\r
-       \r
-       return 0;\r
+       return -4;\r
 }\r
 \r
 }\r
 \r
-int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
-\r
-       *key = 0;\r
-\r
-       UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};\r
+int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
+#define STD_SEARCH 1\r
+#define EXT_SEARCH 2\r
+       *key = 0;       \r
+       UsbCommand c = {CMD_MIFARE_CHKKEYS, { (blockNo | (keyType << 8)), ((EXT_SEARCH << 8) | clear_trace), keycnt}};\r
        memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
        memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
+       clearCommandBuffer();\r
        SendCommand(&c);\r
        SendCommand(&c);\r
-\r
        UsbCommand resp;\r
        UsbCommand resp;\r
-       if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;\r
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)) 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
        if ((resp.arg[0] & 0xff) != 0x01) return 2;\r
        *key = bytes_to_num(resp.d.asBytes, 6);\r
        return 0;\r
 }\r
+// PM3 imp of J-Run mf_key_brute (part 2)\r
+// ref: https://github.com/J-Run/mf_key_brute\r
+int mfKeyBrute(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint64_t *resultkey){\r
+\r
+       #define KEYS_IN_BLOCK 85\r
+       #define KEYBLOCK_SIZE 510\r
+       #define CANDIDATE_SIZE 0xFFFF * 6\r
+       uint8_t found = FALSE;\r
+       uint64_t key64 = 0;\r
+       uint8_t candidates[CANDIDATE_SIZE] = {0x00};\r
+       uint8_t keyBlock[KEYBLOCK_SIZE] = {0x00};\r
+\r
+       memset(candidates, 0, sizeof(candidates));\r
+       memset(keyBlock, 0, sizeof(keyBlock));\r
+       \r
+       // Generate all possible keys for the first two unknown bytes.\r
+       for (uint16_t i = 0; i < 0xFFFF; ++i) {         \r
+               uint32_t j = i * 6;             \r
+               candidates[0 + j] = i >> 8;     \r
+               candidates[1 + j] = i;\r
+               candidates[2 + j] = key[2];\r
+               candidates[3 + j] = key[3];\r
+               candidates[4 + j] = key[4];\r
+               candidates[5 + j] = key[5];\r
+       }\r
+       uint32_t counter, i;\r
+       for ( i = 0, counter = 1; i < CANDIDATE_SIZE; i += KEYBLOCK_SIZE, ++counter){\r
 \r
 \r
-// EMULATOR\r
+               key64 = 0;\r
+               \r
+               // copy candidatekeys to test key block\r
+               memcpy(keyBlock, candidates + i, KEYBLOCK_SIZE);\r
 \r
 \r
+               // check a block of generated candidate keys.\r
+               if (!mfCheckKeys(blockNo, keyType, TRUE, KEYS_IN_BLOCK, keyBlock, &key64)) {\r
+                       *resultkey = key64;\r
+                       found = TRUE;\r
+                       break;\r
+               }\r
+               \r
+               // progress \r
+               if ( counter % 20 == 0 )\r
+                       PrintAndLog("tried : %s.. \t %u keys", sprint_hex(candidates + i, 6),  counter * KEYS_IN_BLOCK  );\r
+       }\r
+       return found;\r
+}\r
+\r
+// EMULATOR\r
 int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
        UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
 int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {\r
        UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};\r
+       clearCommandBuffer();\r
        SendCommand(&c);\r
        SendCommand(&c);\r
-\r
-  UsbCommand resp;\r
-       if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;\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
        memcpy(data, resp.d.asBytes, blocksCount * 16);\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
-       memcpy(c.d.asBytes, data, blocksCount * 16); \r
+       return mfEmlSetMem_xt(data, blockNum, blocksCount, 16);\r
+}\r
+\r
+int mfEmlSetMem_xt(uint8_t *data, int blockNum, int blocksCount, int blockBtWidth) {\r
+       UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, blockBtWidth}};\r
+       memcpy(c.d.asBytes, data, blocksCount * blockBtWidth); \r
+       clearCommandBuffer();\r
        SendCommand(&c);\r
        return 0;\r
 }\r
 \r
 // "MAGIC" CARD\r
        SendCommand(&c);\r
        return 0;\r
 }\r
 \r
 // "MAGIC" CARD\r
+int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, uint8_t wipecard) {\r
 \r
 \r
-int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) {\r
+       uint8_t params = MAGIC_SINGLE;\r
        uint8_t block0[16];\r
        uint8_t block0[16];\r
-       memset(block0, 0, 16);\r
+       memset(block0, 0x00, sizeof(block0));\r
+\r
+       int old = mfCGetBlock(0, block0, params);\r
+       if (old == 0)\r
+               PrintAndLog("old block 0:  %s", sprint_hex(block0, sizeof(block0)));\r
+       else \r
+               PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");       \r
+\r
+       // fill in the new values\r
+       // UID\r
        memcpy(block0, uid, 4); \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
+       // Mifare UID BCC\r
+       block0[4] = block0[0]^block0[1]^block0[2]^block0[3];\r
+       // mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)\r
+       if ( sak != NULL )\r
+               block0[5]=sak[0];\r
        \r
        \r
-       return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);\r
+       if ( atqa != NULL ) {\r
+               block0[6]=atqa[1];\r
+               block0[7]=atqa[0];\r
+       }\r
+       PrintAndLog("new block 0:  %s", sprint_hex(block0,16));\r
+       \r
+       if ( wipecard )          params |= MAGIC_WIPE;  \r
+       if ( oldUID == NULL) params |= MAGIC_UID;\r
+       \r
+       return mfCSetBlock(0, block0, oldUID, params);\r
 }\r
 \r
 }\r
 \r
-int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, int wantWipe, uint8_t params) {\r
-       uint8_t isOK = 0;\r
+int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, uint8_t params) {\r
 \r
 \r
-       UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};\r
+       uint8_t isOK = 0;\r
+       UsbCommand c = {CMD_MIFARE_CSETBLOCK, {params, blockNo, 0}};\r
        memcpy(c.d.asBytes, data, 16); \r
        memcpy(c.d.asBytes, data, 16); \r
+       clearCommandBuffer();\r
        SendCommand(&c);\r
        SendCommand(&c);\r
-\r
-  UsbCommand resp;\r
-       if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
+       UsbCommand resp;\r
+       if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {\r
                isOK  = resp.arg[0] & 0xff;\r
                isOK  = resp.arg[0] & 0xff;\r
-               if (uid != NULL) memcpy(uid, resp.d.asBytes, 4);\r
-               if (!isOK) return 2;\r
+               if (uid != NULL) \r
+                       memcpy(uid, resp.d.asBytes, 4);\r
+               if (!isOK) \r
+                       return 2;\r
        } else {\r
                PrintAndLog("Command execute timeout");\r
                return 1;\r
        } else {\r
                PrintAndLog("Command execute timeout");\r
                return 1;\r
@@ -272,11 +332,10 @@ int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, int wantWipe, uint
 \r
 int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
        uint8_t isOK = 0;\r
 \r
 int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {\r
        uint8_t isOK = 0;\r
-\r
-       UsbCommand c = {CMD_MIFARE_EML_CGETBLOCK, {params, 0, blockNo}};\r
+       UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, blockNo, 0}};    \r
+       clearCommandBuffer();\r
        SendCommand(&c);\r
        SendCommand(&c);\r
-\r
-  UsbCommand resp;\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 (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
                isOK  = resp.arg[0] & 0xff;\r
                memcpy(data, resp.d.asBytes, 16);\r
@@ -289,33 +348,30 @@ int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {
 }\r
 \r
 // SNIFFER\r
 }\r
 \r
 // SNIFFER\r
+// [iceman] so many global variables....\r
 \r
 // constants\r
 static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
 \r
 // variables\r
 \r
 // constants\r
 static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};\r
 \r
 // variables\r
-char logHexFileName[200] = {0x00};\r
+char logHexFileName[FILE_PATH_SIZE] = {0x00};\r
 static uint8_t traceCard[4096] = {0x00};\r
 static uint8_t traceCard[4096] = {0x00};\r
-static char traceFileName[20];\r
+static char traceFileName[FILE_PATH_SIZE] = {0x00};\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
 static int traceState = TRACE_IDLE;\r
 static uint8_t traceCurBlock = 0;\r
 static uint8_t traceCurKey = 0;\r
 \r
 struct Crypto1State *traceCrypto1 = NULL;\r
+struct Crypto1State *revstate = NULL;\r
+uint64_t key = 0;\r
+uint32_t ks2 = 0;\r
+uint32_t ks3 = 0;\r
 \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
+uint32_t cuid = 0;    // serial number\r
+uint32_t nt =0;      // tag challenge\r
+uint32_t nr_enc =0;  // encrypted reader challenge\r
+uint32_t ar_enc =0;  // encrypted reader response\r
+uint32_t at_enc =0;  // encrypted tag response\r
 \r
 int isTraceCardEmpty(void) {\r
        return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
 \r
 int isTraceCardEmpty(void) {\r
        return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));\r
@@ -329,78 +385,100 @@ int isBlockEmpty(int blockN) {
 }\r
 \r
 int isBlockTrailer(int blockN) {\r
 }\r
 \r
 int isBlockTrailer(int blockN) {\r
- return ((blockN & 0x03) == 0x03);\r
+       return ((blockN & 0x03) == 0x03);\r
 }\r
 \r
 }\r
 \r
-int loadTraceCard(uint8_t *tuid) {\r
+int loadTraceCard(uint8_t *tuid, uint8_t uidlen) {\r
        FILE * f;\r
        FILE * f;\r
-       char buf[64];\r
-       uint8_t buf8[64];\r
+       char buf[64] = {0x00};\r
+       uint8_t buf8[64] = {0x00};\r
        int i, blockNum;\r
        \r
        int i, blockNum;\r
        \r
-       if (!isTraceCardEmpty()) saveTraceCard();\r
+       if (!isTraceCardEmpty()) \r
+               saveTraceCard();\r
+               \r
        memset(traceCard, 0x00, 4096);\r
        memset(traceCard, 0x00, 4096);\r
-       memcpy(traceCard, tuid + 3, 4);\r
-       FillFileNameByUID(traceFileName, tuid, ".eml", 7);\r
+       memcpy(traceCard, tuid, uidlen);\r
+\r
+       FillFileNameByUID(traceFileName, tuid, ".eml", uidlen);\r
 \r
        f = fopen(traceFileName, "r");\r
        if (!f) return 1;\r
        \r
        blockNum = 0;\r
 \r
        f = fopen(traceFileName, "r");\r
        if (!f) return 1;\r
        \r
        blockNum = 0;\r
+               \r
        while(!feof(f)){\r
        while(!feof(f)){\r
+       \r
                memset(buf, 0, sizeof(buf));\r
                if (fgets(buf, sizeof(buf), f) == NULL) {\r
                memset(buf, 0, sizeof(buf));\r
                if (fgets(buf, sizeof(buf), f) == NULL) {\r
-      PrintAndLog("File reading error.");\r
+                       PrintAndLog("No trace file found or reading error.");\r
+                       if (f) {\r
+                               fclose(f);\r
+                               f = NULL;\r
+                       }\r
                        return 2;\r
                        return 2;\r
-    }\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
 \r
                if (strlen(buf) < 32){\r
                        if (feof(f)) break;\r
                        PrintAndLog("File content error. Block data must include 32 HEX symbols");\r
+                       if (f) {\r
+                               fclose(f);\r
+                               f = NULL;\r
+                       }\r
                        return 2;\r
                }\r
                for (i = 0; i < 32; i += 2)\r
                        return 2;\r
                }\r
                for (i = 0; i < 32; i += 2)\r
-                       sscanf(&buf[i], "%02x", (unsigned int *)&buf8[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
 \r
                memcpy(traceCard + blockNum * 16, buf8, 16);\r
 \r
                blockNum++;\r
        }\r
-       fclose(f);\r
-\r
+       if (f) {\r
+               fclose(f);\r
+               f = NULL;\r
+       }\r
        return 0;\r
 }\r
 \r
 int saveTraceCard(void) {\r
        return 0;\r
 }\r
 \r
 int saveTraceCard(void) {\r
-       FILE * f;\r
        \r
        if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
        \r
        \r
        if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;\r
        \r
+       FILE * f;\r
        f = fopen(traceFileName, "w+");\r
        f = fopen(traceFileName, "w+");\r
+       if ( !f ) return 1;\r
+       \r
        for (int i = 0; i < 64; i++) {  // blocks\r
                for (int j = 0; j < 16; j++)  // bytes\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, "%02X", *(traceCard + i * 16 + j)); \r
                fprintf(f,"\n");\r
        }\r
                fprintf(f,"\n");\r
        }\r
-       fclose(f);\r
-\r
+       fflush(f);\r
+       if (f) {\r
+               fclose(f);\r
+               f = NULL;\r
+       }\r
        return 0;\r
 }\r
 \r
        return 0;\r
 }\r
 \r
-int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r
+int mfTraceInit(uint8_t *tuid, uint8_t uidlen, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {\r
+\r
+       if (traceCrypto1) \r
+               crypto1_destroy(traceCrypto1);\r
 \r
 \r
-       if (traceCrypto1) crypto1_destroy(traceCrypto1);\r
        traceCrypto1 = NULL;\r
 \r
        traceCrypto1 = NULL;\r
 \r
-       if (wantSaveToEmlFile) loadTraceCard(tuid);\r
+       if (wantSaveToEmlFile) \r
+               loadTraceCard(tuid, uidlen);\r
+               \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
        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
+       cuid = bytes_to_num(tuid+(uidlen-4), 4);\r
        traceState = TRACE_IDLE;\r
        traceState = TRACE_IDLE;\r
-\r
        return 0;\r
 }\r
 \r
        return 0;\r
 }\r
 \r
@@ -412,44 +490,48 @@ void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len, bool i
                for (i = 0; i < len; i++)\r
                        data[i] = crypto1_byte(pcs, 0x00, isEncrypted) ^ data[i];\r
        } else {\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
+               bt = 0;         \r
+               bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 0)) << 0;\r
+               bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 1)) << 1;\r
+               bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 2)) << 2;\r
+               bt |= (crypto1_bit(pcs, 0, isEncrypted) ^ BIT(data[0], 3)) << 3;                        \r
                data[0] = bt;\r
        }\r
        return;\r
 }\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
+int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {\r
 \r
        if (traceState == TRACE_ERROR) return 1;\r
 \r
        if (traceState == TRACE_ERROR) return 1;\r
+\r
        if (len > 64) {\r
                traceState = TRACE_ERROR;\r
                return 1;\r
        }\r
        \r
        if (len > 64) {\r
                traceState = TRACE_ERROR;\r
                return 1;\r
        }\r
        \r
+       uint8_t data[64];\r
+       memset(data, 0x00, sizeof(data));\r
+       \r
        memcpy(data, data_src, len);\r
        memcpy(data, data_src, len);\r
+       \r
        if ((traceCrypto1) && ((traceState == TRACE_IDLE) || (traceState > TRACE_AUTH_OK))) {\r
                mf_crypto1_decrypt(traceCrypto1, data, len, 0);\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
+               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
        }\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
+                       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
                        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
+               if ((len == 4) && ((data[0] == MIFARE_AUTH_KEYA) || (data[0] == MIFARE_AUTH_KEYB))) {\r
                        traceState = TRACE_AUTH1;\r
                        traceCurBlock = data[1];\r
                        traceCurKey = data[0] == 60 ? 1:0;\r
                        traceState = TRACE_AUTH1;\r
                        traceCurBlock = data[1];\r
                        traceCurKey = data[0] == 60 ? 1:0;\r
@@ -457,28 +539,25 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm
                }\r
 \r
                // READ\r
                }\r
 \r
                // READ\r
-               if ((len ==4) && ((data[0] == 0x30))) {\r
+               if ((len ==4) && ((data[0] == ISO14443A_CMD_READBLOCK))) {\r
                        traceState = TRACE_READ_DATA;\r
                        traceCurBlock = data[1];\r
                        return 0;\r
                }\r
 \r
                // WRITE\r
                        traceState = TRACE_READ_DATA;\r
                        traceCurBlock = data[1];\r
                        return 0;\r
                }\r
 \r
                // WRITE\r
-               if ((len ==4) && ((data[0] == 0xA0))) {\r
+               if ((len ==4) && ((data[0] == ISO14443A_CMD_WRITEBLOCK))) {\r
                        traceState = TRACE_WRITE_OK;\r
                        traceCurBlock = data[1];\r
                        return 0;\r
                }\r
 \r
                // HALT\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
+               if ((len ==4) && ((data[0] == ISO14443A_CMD_HALT) && (data[1] == 0x00))) {\r
                        traceState = TRACE_ERROR;  // do not decrypt the next commands\r
                        return 0;\r
                }\r
                        traceState = TRACE_ERROR;  // do not decrypt the next commands\r
                        return 0;\r
                }\r
-               \r
                return 0;\r
                return 0;\r
-       break;\r
-       \r
        case TRACE_READ_DATA: \r
                if (len == 18) {\r
                        traceState = TRACE_IDLE;\r
        case TRACE_READ_DATA: \r
                if (len == 18) {\r
                        traceState = TRACE_IDLE;\r
@@ -494,23 +573,19 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
-       break;\r
-\r
+               break;\r
        case TRACE_WRITE_OK: \r
        case TRACE_WRITE_OK: \r
-               if ((len == 1) && (data[0] = 0x0a)) {\r
+               if ((len == 1) && (data[0] == 0x0a)) {\r
                        traceState = TRACE_WRITE_DATA;\r
                        traceState = TRACE_WRITE_DATA;\r
-\r
                        return 0;\r
                } else {\r
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
                        return 0;\r
                } else {\r
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
-       break;\r
-\r
+               break;\r
        case TRACE_WRITE_DATA: \r
                if (len == 18) {\r
                        traceState = TRACE_IDLE;\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
                        memcpy(traceCard + traceCurBlock * 16, data, 16);\r
                        if (wantSaveToEmlFile) saveTraceCard();\r
                        return 0;\r
@@ -518,100 +593,85 @@ int mfTraceDecode(uint8_t *data_src, int len, uint32_t parity, bool wantSaveToEm
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
-       break;\r
-\r
+               break;\r
        case TRACE_AUTH1: \r
                if (len == 4) {\r
                        traceState = TRACE_AUTH2;\r
        case TRACE_AUTH1: \r
                if (len == 4) {\r
                        traceState = TRACE_AUTH2;\r
-\r
                        nt = bytes_to_num(data, 4);\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
                        return 0;\r
                } else {\r
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
-       break;\r
-\r
+               break;\r
        case TRACE_AUTH2: \r
                if (len == 8) {\r
                        traceState = TRACE_AUTH_OK;\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_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
                        return 0;\r
                } else {\r
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
-       break;\r
-\r
+               break;\r
        case TRACE_AUTH_OK: \r
        case TRACE_AUTH_OK: \r
-               if (len ==4) {\r
+               if (len == 4) {\r
                        traceState = TRACE_IDLE;\r
                        traceState = TRACE_IDLE;\r
-\r
                        at_enc = bytes_to_num(data, 4);\r
                        at_enc = bytes_to_num(data, 4);\r
-                       at_par = parity;\r
                        \r
                        //  decode key here)\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
+                       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, cuid ^ nt, 0);\r
+                       crypto1_get_lfsr(revstate, &key);\r
+                       PrintAndLog("Found Key: [%012" PRIx64 "]", key);\r
+                       \r
+                       //if ( tryMfk64(cuid, nt, nr_enc, ar_enc, at_enc, &key) )\r
+                       AddLogUint64(logHexFileName, "Found Key: ", key); \r
                        \r
                        int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;\r
                        if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);\r
                        \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
+                       if (traceCurKey)\r
+                               num_to_bytes(key, 6, traceCard + blockShift + 10);\r
+                       else\r
+                               num_to_bytes(key, 6, traceCard + blockShift);\r
+                       \r
+                       if (wantSaveToEmlFile)\r
+                               saveTraceCard();\r
 \r
 \r
-                       if (traceCrypto1) {\r
+                       if (traceCrypto1)\r
                                crypto1_destroy(traceCrypto1);\r
                                crypto1_destroy(traceCrypto1);\r
-                       }\r
                        \r
                        // set cryptosystem state\r
                        traceCrypto1 = lfsr_recovery64(ks2, ks3);\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
                        return 0;\r
                } else {\r
                        traceState = TRACE_ERROR;\r
                        return 1;\r
                }\r
-       break;\r
-\r
+               break;\r
        default: \r
                traceState = TRACE_ERROR;\r
                return 1;\r
        }\r
        default: \r
                traceState = TRACE_ERROR;\r
                return 1;\r
        }\r
+       return 0;\r
+}\r
 \r
 \r
+int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){\r
+       PrintAndLog("\nEncrypted data: [%s]", sprint_hex(data, len) );\r
+       struct Crypto1State *s;\r
+       ks2 = ar_enc ^ prng_successor(nt, 64);\r
+       ks3 = at_enc ^ prng_successor(nt, 96);\r
+       s = lfsr_recovery64(ks2, ks3);\r
+       mf_crypto1_decrypt(s, data, len, FALSE);\r
+       PrintAndLog("Decrypted data: [%s]", sprint_hex(data, len) );\r
+       crypto1_destroy(s);\r
        return 0;\r
 }\r
        return 0;\r
 }\r
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