minor fix when reading blocks

[proxmark3-svn] / client / mifarehost.c

// 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
// mifare commands\r
//-----------------------------------------------------------------------------\r
\r
#include <stdio.h>\r
#include <stdlib.h> \r
#include <string.h>\r
#include "mifarehost.h"\r
#include "proxmark3.h"\r
\r
// MIFARE\r
\r
int compar_int(const void * a, const void * b) {\r
	return (*(uint64_t*)b - *(uint64_t*)a);\r
}\r
\r
// Compare countKeys structure\r
int compar_special_int(const void * a, const void * b) {\r
	return (((countKeys *)b)->count - ((countKeys *)a)->count);\r
}\r
\r
countKeys * uniqsort(uint64_t * possibleKeys, uint32_t size) {\r
	int i, j = 0;\r
	int count = 0;\r
	countKeys *our_counts;\r
	\r
	qsort(possibleKeys, size, sizeof (uint64_t), compar_int);\r
	\r
	our_counts = calloc(size, sizeof(countKeys));\r
	if (our_counts == NULL) {\r
		PrintAndLog("Memory allocation error for our_counts");\r
		return NULL;\r
	}\r
	\r
	for (i = 0; i < size; i++) {\r
        if (possibleKeys[i+1] == possibleKeys[i]) { \r
			count++;\r
		} else {\r
			our_counts[j].key = possibleKeys[i];\r
			our_counts[j].count = count;\r
			j++;\r
			count=0;\r
		}\r
	}\r
	qsort(our_counts, j, sizeof(countKeys), compar_special_int);\r
	return (our_counts);\r
}\r
\r
int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKeys) \r
{\r
	int i, m, len;\r
	uint8_t isEOF;\r
	uint32_t uid;\r
	fnVector * vector = NULL;\r
	countKeys	*ck;\r
	int lenVector = 0;\r
	UsbCommand resp;\r
	\r
	memset(resultKeys, 0x00, 16 * 6);\r
\r
	// flush queue\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
  SendCommand(&c);\r
\r
	PrintAndLog("\n");\r
\r
	// wait cycle\r
	while (true) {\r
		printf(".");\r
		if (ukbhit()) {\r
			getchar();\r
			printf("\naborted via keyboard!\n");\r
			break;\r
		}\r
\r
		if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {\r
			isEOF  = resp.arg[0] & 0xff;\r
\r
			if (isEOF) break;\r
			\r
			len = resp.arg[1] & 0xff;\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
			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
				break;\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].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
			}\r
\r
			lenVector += len;\r
		}\r
	}\r
	\r
	if (!lenVector) {\r
		PrintAndLog("Got 0 keys from proxmark."); \r
		return 1;\r
	}\r
	printf("------------------------------------------------------------------\n");\r
	\r
	// calc keys\r
	struct Crypto1State* revstate = NULL;\r
	struct Crypto1State* revstate_start = NULL;\r
	uint64_t lfsr;\r
	int kcount = 0;\r
	pKeys		*pk;\r
	\r
	if ((pk = (void *) malloc(sizeof(pKeys))) == NULL) return 1;\r
	memset(pk, 0x00, sizeof(pKeys));\r
	\r
	for (m = 0; m < lenVector; m++) {\r
		// And finally recover the first 32 bits of the key\r
		revstate = lfsr_recovery32(vector[m].ks1, vector[m].nt ^ vector[m].uid);\r
		if (revstate_start == NULL) revstate_start = revstate;\r
	\r
		while ((revstate->odd != 0x0) || (revstate->even != 0x0)) {\r
			lfsr_rollback_word(revstate, vector[m].nt ^ vector[m].uid, 0);\r
			crypto1_get_lfsr(revstate, &lfsr);\r
\r
			// Allocate a new space for keys\r
			if (((kcount % MEM_CHUNK) == 0) || (kcount >= pk->size)) {\r
				pk->size += MEM_CHUNK;\r
//fprintf(stdout, "New chunk by %d, sizeof %d\n", kcount, pk->size * sizeof(uint64_t));\r
				pk->possibleKeys = (uint64_t *) realloc((void *)pk->possibleKeys, pk->size * sizeof(uint64_t));\r
				if (pk->possibleKeys == NULL) {\r
					PrintAndLog("Memory allocation error for pk->possibleKeys"); \r
					return 1;\r
				}\r
			}\r
			pk->possibleKeys[kcount] = lfsr;\r
			kcount++;\r
			revstate++;\r
		}\r
	free(revstate_start);\r
	revstate_start = NULL;\r
\r
	}\r
	\r
	// Truncate\r
	if (kcount != 0) {\r
		pk->size = --kcount;\r
		if ((pk->possibleKeys = (uint64_t *) realloc((void *)pk->possibleKeys, pk->size * sizeof(uint64_t))) == NULL) {\r
			PrintAndLog("Memory allocation error for pk->possibleKeys"); \r
			return 1;\r
		}		\r
	}\r
\r
	PrintAndLog("Total keys count:%d", kcount);\r
	ck = uniqsort(pk->possibleKeys, pk->size);\r
\r
	// fill key array\r
	for (i = 0; i < 16 ; i++) {\r
		num_to_bytes(ck[i].key, 6, (uint8_t*)(resultKeys + i * 6));\r
	}\r
\r
	// finalize\r
	free(pk->possibleKeys);\r
	free(pk);\r
	free(ck);\r
	free(vector);\r
\r
	return 0;\r
}\r
\r
int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){\r
	*key = 0;\r
\r
  UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};\r
	memcpy(c.d.asBytes, keyBlock, 6 * keycnt);\r
  SendCommand(&c);\r
\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
// EMULATOR\r
\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
  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
	UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};\r
	memcpy(c.d.asBytes, data, blocksCount * 16); \r
	SendCommand(&c);\r
	return 0;\r
}\r
\r
// "MAGIC" CARD\r
\r
int mfCSetUID(uint8_t *uid, uint8_t *oldUID, int wantWipe) {\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
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
	UsbCommand c = {CMD_MIFARE_EML_CGETBLOCK, {params, 0, blockNo}};\r
	SendCommand(&c);\r
\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
		return 1;\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
		fgets(buf, sizeof(buf), f);\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