X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/6bfa18eab4750123d0e24090597b0d4c7bd58daf..fff6d2a3ba4bd387517df9c3aaef14ec823e552e:/client/mifarehost.c

diff --git a/client/mifarehost.c b/client/mifarehost.c
index 378fb2e5..e6ad6016 100644
--- a/client/mifarehost.c
+++ b/client/mifarehost.c
@@ -15,6 +15,8 @@
 #include "mifarehost.h"
 #include "proxmark3.h"
 
+#define llx PRIx64
+
 // MIFARE
 int compar_int(const void * a, const void * b) {
 	// didn't work: (the result is truncated to 32 bits)
@@ -26,8 +28,6 @@ int compar_int(const void * a, const void * b) {
 	else return -1;
 }
 
-
-
 // Compare 16 Bits out of cryptostate
 int Compare16Bits(const void * a, const void * b) {
 	if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;
@@ -35,7 +35,6 @@ int Compare16Bits(const void * a, const void * b) {
 	else return -1;
 }
 
-
 typedef 
 	struct {
 		union {
@@ -70,16 +69,12 @@ void* nested_worker_thread(void *arg)
 	return statelist->head.slhead;
 }
 
-
-
-
 int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t * resultKey, bool calibrate) 
 {
-	uint16_t i, len;
+	uint16_t i;
 	uint32_t uid;
 	UsbCommand resp;
 
-	
 	StateList_t statelists[2];
 	struct Crypto1State *p1, *p2, *p3, *p4;
 	
@@ -90,25 +85,23 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo
 	memcpy(c.d.asBytes, key, 6);
 	SendCommand(&c);
 
-	if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
-		len = resp.arg[1];
-		if (len == 2) {	
-			memcpy(&uid, resp.d.asBytes, 4);
-			PrintAndLog("uid:%08x len=%d trgbl=%d trgkey=%x", uid, len, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);
-			
-			for (i = 0; i < 2; i++) {
-				statelists[i].blockNo = resp.arg[2] & 0xff;
-				statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;
-				statelists[i].uid = uid;
+	if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
+		return -1;
+	}
 
-				memcpy(&statelists[i].nt,  (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);
-				memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);
-			}
-		}
-		else {
-			PrintAndLog("Got 0 keys from proxmark."); 
-			return 1;
-		}
+	if (resp.arg[0]) {
+		return resp.arg[0];  // error during nested
+	}
+		
+	memcpy(&uid, resp.d.asBytes, 4);
+	PrintAndLog("uid:%08x trgbl=%d trgkey=%x", uid, (uint16_t)resp.arg[2] & 0xff, (uint16_t)resp.arg[2] >> 8);
+			
+	for (i = 0; i < 2; i++) {
+		statelists[i].blockNo = resp.arg[2] & 0xff;
+		statelists[i].keyType = (resp.arg[2] >> 8) & 0xff;
+		statelists[i].uid = uid;
+		memcpy(&statelists[i].nt,  (void *)(resp.d.asBytes + 4 + i * 8 + 0), 4);
+		memcpy(&statelists[i].ks1, (void *)(resp.d.asBytes + 4 + i * 8 + 4), 4);
 	}
 	
 	// calc keys
@@ -190,26 +183,26 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo
 		crypto1_get_lfsr(statelists[0].head.slhead + i, &key64);
 		num_to_bytes(key64, 6, keyBlock);
 		key64 = 0;
-		if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, 1, keyBlock, &key64)) {
+		if (!mfCheckKeys(statelists[0].blockNo, statelists[0].keyType, false, 1, keyBlock, &key64)) {
 			num_to_bytes(key64, 6, resultKey);
 			break;
 		}
 	}
 	
 	free(statelists[0].head.slhead);
-	free(statelists[1].head.slhead);
-	
+	free(statelists[1].head.slhead);	
 	return 0;
 }
 
-int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){
+int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, uint64_t * key){
 
 	*key = 0;
 
-	UsbCommand c = {CMD_MIFARE_CHKKEYS, {blockNo, keyType, keycnt}};
+	UsbCommand c = {CMD_MIFARE_CHKKEYS, {((blockNo & 0xff) | ((keyType&0xff)<<8)), clear_trace, keycnt}};
 	memcpy(c.d.asBytes, keyBlock, 6 * keycnt);
+	
+	clearCommandBuffer();
 	SendCommand(&c);
-
 	UsbCommand resp;
 	if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;
 	if ((resp.arg[0] & 0xff) != 0x01) return 2;
@@ -221,48 +214,78 @@ int mfCheckKeys (uint8_t blockNo, uint8_t keyType, uint8_t keycnt, uint8_t * key
 
 int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount) {
 	UsbCommand c = {CMD_MIFARE_EML_MEMGET, {blockNum, blocksCount, 0}};
+	clearCommandBuffer();
  	SendCommand(&c);
-
-  UsbCommand resp;
+	UsbCommand resp;
 	if (!WaitForResponseTimeout(CMD_ACK,&resp,1500)) return 1;
 	memcpy(data, resp.d.asBytes, blocksCount * 16);
 	return 0;
 }
 
 int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount) {
-	UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, 0}};
-	memcpy(c.d.asBytes, data, blocksCount * 16); 
+	return mfEmlSetMem_xt(data, blockNum, blocksCount, 16);
+}
+
+int mfEmlSetMem_xt(uint8_t *data, int blockNum, int blocksCount, int blockBtWidth) {
+	UsbCommand c = {CMD_MIFARE_EML_MEMSET, {blockNum, blocksCount, blockBtWidth}};
+	memcpy(c.d.asBytes, data, blocksCount * blockBtWidth); 
+
+	clearCommandBuffer();
 	SendCommand(&c);
 	return 0;
 }
 
 // "MAGIC" CARD
 
-int mfCSetUID(uint8_t *uid, uint8_t *oldUID, bool wantWipe) {
+int mfCSetUID(uint8_t *uid, uint8_t *atqa, uint8_t *sak, uint8_t *oldUID, uint8_t wipecard) {
+
+	uint8_t params = MAGIC_SINGLE;
 	uint8_t block0[16];
-	memset(block0, 0, 16);
+	memset(block0, 0x00, sizeof(block0));
+	
+
+	int old = mfCGetBlock(0, block0, params);
+	if (old == 0) {
+		PrintAndLog("old block 0:  %s", sprint_hex(block0, sizeof(block0)));
+	} else {
+		PrintAndLog("Couldn't get old data. Will write over the last bytes of Block 0.");
+	}
+
+	// fill in the new values
+	// UID
 	memcpy(block0, uid, 4); 
-	block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // Mifare UID BCC
-	// mifare classic SAK(byte 5) and ATQA(byte 6 and 7)
-	block0[5] = 0x88;
-	block0[6] = 0x04;
-	block0[7] = 0x00;
+	// Mifare UID BCC
+	block0[4] = block0[0]^block0[1]^block0[2]^block0[3];
+	// mifare classic SAK(byte 5) and ATQA(byte 6 and 7, reversed)
+	if ( sak != NULL )
+		block0[5]=sak[0];
+	
+	if ( atqa != NULL ) {
+		block0[6]=atqa[1];
+		block0[7]=atqa[0];
+	}
+	PrintAndLog("new block 0:  %s", sprint_hex(block0,16));
+	
+	if ( wipecard )		 params |= MAGIC_WIPE;	
+	if ( oldUID == NULL) params |= MAGIC_UID;
 	
-	return mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER);
+	return mfCSetBlock(0, block0, oldUID, params);
 }
 
-int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uint8_t params) {
-	uint8_t isOK = 0;
+int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, uint8_t params) {
 
-	UsbCommand c = {CMD_MIFARE_EML_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};
+	uint8_t isOK = 0;
+	UsbCommand c = {CMD_MIFARE_CSETBLOCK, {params, blockNo, 0}};
 	memcpy(c.d.asBytes, data, 16); 
+	clearCommandBuffer();
 	SendCommand(&c);
-
-  UsbCommand resp;
-	if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
+	UsbCommand resp;
+	if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
 		isOK  = resp.arg[0] & 0xff;
-		if (uid != NULL) memcpy(uid, resp.d.asBytes, 4);
-		if (!isOK) return 2;
+		if (uid != NULL) 
+			memcpy(uid, resp.d.asBytes, 4);
+		if (!isOK) 
+			return 2;
 	} else {
 		PrintAndLog("Command execute timeout");
 		return 1;
@@ -272,11 +295,10 @@ int mfCSetBlock(uint8_t blockNo, uint8_t *data, uint8_t *uid, bool wantWipe, uin
 
 int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {
 	uint8_t isOK = 0;
-
-	UsbCommand c = {CMD_MIFARE_EML_CGETBLOCK, {params, 0, blockNo}};
+	UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, blockNo, 0}};	
+	clearCommandBuffer();
 	SendCommand(&c);
-
-  UsbCommand resp;
+	UsbCommand resp;
 	if (WaitForResponseTimeout(CMD_ACK,&resp,1500)) {
 		isOK  = resp.arg[0] & 0xff;
 		memcpy(data, resp.d.asBytes, 16);
@@ -294,25 +316,26 @@ int mfCGetBlock(uint8_t blockNo, uint8_t *data, uint8_t params) {
 static uint8_t trailerAccessBytes[4] = {0x08, 0x77, 0x8F, 0x00};
 
 // variables
-char logHexFileName[200] = {0x00};
+char logHexFileName[FILE_PATH_SIZE] = {0x00};
 static uint8_t traceCard[4096] = {0x00};
-static char traceFileName[200] = {0};
+static char traceFileName[FILE_PATH_SIZE] = {0x00};
 static int traceState = TRACE_IDLE;
 static uint8_t traceCurBlock = 0;
 static uint8_t traceCurKey = 0;
 
 struct Crypto1State *traceCrypto1 = NULL;
 
-struct Crypto1State *revstate;
-uint64_t lfsr;
-uint32_t ks2;
-uint32_t ks3;
+struct Crypto1State *revstate = NULL;
 
-uint32_t uid;     // serial number
-uint32_t nt;      // tag challenge
-uint32_t nr_enc;  // encrypted reader challenge
-uint32_t ar_enc;  // encrypted reader response
-uint32_t at_enc;  // encrypted tag response
+uint64_t key = 0;
+uint32_t ks2 = 0;
+uint32_t ks3 = 0;
+
+uint32_t uid = 0;     // serial number
+uint32_t nt =0;      // tag challenge
+uint32_t nr_enc =0;  // encrypted reader challenge
+uint32_t ar_enc =0;  // encrypted reader response
+uint32_t at_enc =0;  // encrypted tag response
 
 int isTraceCardEmpty(void) {
 	return ((traceCard[0] == 0) && (traceCard[1] == 0) && (traceCard[2] == 0) && (traceCard[3] == 0));
@@ -331,26 +354,31 @@ int isBlockTrailer(int blockN) {
 
 int loadTraceCard(uint8_t *tuid) {
 	FILE * f;
-	char buf[64];
-	uint8_t buf8[64];
+	char buf[64] = {0x00};
+	uint8_t buf8[64] = {0x00};
 	int i, blockNum;
 	
-	if (!isTraceCardEmpty()) saveTraceCard();
+	if (!isTraceCardEmpty()) 
+		saveTraceCard();
+		
 	memset(traceCard, 0x00, 4096);
 	memcpy(traceCard, tuid + 3, 4);
+
 	FillFileNameByUID(traceFileName, tuid, ".eml", 7);
 
 	f = fopen(traceFileName, "r");
 	if (!f) return 1;
 	
 	blockNum = 0;
+		
 	while(!feof(f)){
+	
 		memset(buf, 0, sizeof(buf));
 		if (fgets(buf, sizeof(buf), f) == NULL) {
 			PrintAndLog("File reading error.");
 			fclose(f);
 			return 2;
-    	}
+		}
 
 		if (strlen(buf) < 32){
 			if (feof(f)) break;
@@ -376,22 +404,27 @@ int saveTraceCard(void) {
 	if ((!strlen(traceFileName)) || (isTraceCardEmpty())) return 0;
 	
 	f = fopen(traceFileName, "w+");
+	if ( !f ) return 1;
+	
 	for (int i = 0; i < 64; i++) {  // blocks
 		for (int j = 0; j < 16; j++)  // bytes
 			fprintf(f, "%02x", *(traceCard + i * 16 + j)); 
 		fprintf(f,"\n");
 	}
 	fclose(f);
-
 	return 0;
 }
 
 int mfTraceInit(uint8_t *tuid, uint8_t *atqa, uint8_t sak, bool wantSaveToEmlFile) {
 
-	if (traceCrypto1) crypto1_destroy(traceCrypto1);
+	if (traceCrypto1) 
+		crypto1_destroy(traceCrypto1);
+
 	traceCrypto1 = NULL;
 
-	if (wantSaveToEmlFile) loadTraceCard(tuid);
+	if (wantSaveToEmlFile) 
+		loadTraceCard(tuid);
+		
 	traceCard[4] = traceCard[0] ^ traceCard[1] ^ traceCard[2] ^ traceCard[3];
 	traceCard[5] = sak;
 	memcpy(&traceCard[6], atqa, 2);
@@ -448,7 +481,7 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 		}
 		
 		// AUTHENTICATION
-		if ((len ==4) && ((data[0] == 0x60) || (data[0] == 0x61))) {
+		if ((len == 4) && ((data[0] == 0x60) || (data[0] == 0x61))) {
 			traceState = TRACE_AUTH1;
 			traceCurBlock = data[1];
 			traceCurKey = data[0] == 60 ? 1:0;
@@ -522,7 +555,6 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 	case TRACE_AUTH1: 
 		if (len == 4) {
 			traceState = TRACE_AUTH2;
-
 			nt = bytes_to_num(data, 4);
 			return 0;
 		} else {
@@ -558,17 +590,18 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 			lfsr_rollback_word(revstate, 0, 0);
 			lfsr_rollback_word(revstate, nr_enc, 1);
 			lfsr_rollback_word(revstate, uid ^ nt, 0);
-			crypto1_get_lfsr(revstate, &lfsr);
-			printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));
-			AddLogUint64(logHexFileName, "key> ", lfsr); 
+
+			crypto1_get_lfsr(revstate, &key);
+			printf("Key: %012"llx"\n",key);
+			AddLogUint64(logHexFileName, "key: ", key); 
 			
 			int blockShift = ((traceCurBlock & 0xFC) + 3) * 16;
 			if (isBlockEmpty((traceCurBlock & 0xFC) + 3)) memcpy(traceCard + blockShift + 6, trailerAccessBytes, 4);
 			
 			if (traceCurKey) {
-				num_to_bytes(lfsr, 6, traceCard + blockShift + 10);
+				num_to_bytes(key, 6, traceCard + blockShift + 10);
 			} else {
-				num_to_bytes(lfsr, 6, traceCard + blockShift);
+				num_to_bytes(key, 6, traceCard + blockShift);
 			}
 			if (wantSaveToEmlFile) saveTraceCard();
 
@@ -581,7 +614,7 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 			
 //	nt = crypto1_word(traceCrypto1, nt ^ uid, 1) ^ nt;
 
-	/*	traceCrypto1 = crypto1_create(lfsr); // key in lfsr
+	/*	traceCrypto1 = crypto1_create(key); // key in lfsr
 		crypto1_word(traceCrypto1, nt ^ uid, 0);
 		crypto1_word(traceCrypto1, ar, 1);
 		crypto1_word(traceCrypto1, 0, 0);
@@ -601,3 +634,29 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 
 	return 0;
 }
+
+int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){
+	/*
+	uint32_t nt;      // tag challenge
+	uint32_t nr_enc;  // encrypted reader challenge
+	uint32_t ar_enc;  // encrypted reader response
+	uint32_t at_enc;  // encrypted tag response
+	*/
+
+	struct Crypto1State *pcs = NULL;
+	
+	ks2 = ar_enc ^ prng_successor(nt, 64);
+	ks3 = at_enc ^ prng_successor(nt, 96);
+	
+	PrintAndLog("Decrypting data with:");
+	PrintAndLog("      nt: %08x",nt);
+	PrintAndLog("  ar_enc: %08x",ar_enc);
+	PrintAndLog("  at_enc: %08x",at_enc);
+	PrintAndLog("\nEncrypted data: [%s]", sprint_hex(data,len) );
+
+	pcs = lfsr_recovery64(ks2, ks3);
+	mf_crypto1_decrypt(pcs, data, len, FALSE);
+	PrintAndLog("Decrypted data: [%s]", sprint_hex(data,len) );
+	crypto1_destroy(pcs);
+	return 0;
+}