X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/20f9a2a1d54952ed15066c93490f0e8fb0d43b67..f397b5cc874ac7d658173199d92c30f3f717a300:/armsrc/mifareutil.c

diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c
index ede1cbc9..53e785f5 100644
--- a/armsrc/mifareutil.c
+++ b/armsrc/mifareutil.c
@@ -19,11 +19,18 @@
 #include "crapto1.h"
 #include "mifareutil.h"
 
+int MF_DBGLEVEL = MF_DBG_ALL;
+
 uint8_t* mifare_get_bigbufptr(void) {
 	return (((uint8_t *)BigBuf) + 3560);	// was 3560 - tied to other size changes
 }
 
 int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer)
+{
+	return mifare_sendcmd_shortex(pcs, crypted, cmd, data, answer, NULL);
+}
+
+int mifare_sendcmd_shortex(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer, uint32_t * parptr)
 {
 	uint8_t dcmd[4], ecmd[4];
 	uint32_t pos, par, res;
@@ -48,9 +55,11 @@ int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd,
 		ReaderTransmit(dcmd, sizeof(dcmd));
 	}
 
-	int len = ReaderReceive(answer);
+	int len = ReaderReceivePar(answer, &par);
+	
+	if (parptr) *parptr = par;
 
-	if (crypted) {
+	if (crypted == CRYPT_ALL) {
 		if (len == 1) {
 			res = 0;
 			for (pos = 0; pos < 4; pos++)
@@ -70,22 +79,27 @@ int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd,
 }
 
 int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested) 
+{
+	return mifare_classic_authex(pcs, uid, blockNo, keyType, ui64Key, isNested, NULL);
+}
+
+int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t keyType, uint64_t ui64Key, uint64_t isNested, uint32_t * ntptr) 
 {
 	// variables
-  int len;	
+	int len;	
 	uint32_t pos;
 	uint8_t tmp4[4];
-  byte_t par = 0;
-  byte_t ar[4];
+	byte_t par = 0;
+	byte_t ar[4];
 	uint32_t nt, ntpp; // Supplied tag nonce
 	
 	uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
-  uint8_t* receivedAnswer = mifare_get_bigbufptr();
+	uint8_t* receivedAnswer = mifare_get_bigbufptr();
 
-  // Transmit MIFARE_CLASSIC_AUTH
+	// Transmit MIFARE_CLASSIC_AUTH
 	len = mifare_sendcmd_short(pcs, isNested, 0x60 + (keyType & 0x01), blockNo, receivedAnswer);
-//	Dbprintf("rand nonce len: %x", len);  
-  if (len != 4) return 1;
+  if (MF_DBGLEVEL >= 4)	Dbprintf("rand nonce len: %x", len);  
+	if (len != 4) return 1;
 	
 	ar[0] = 0x55;
 	ar[1] = 0x41;
@@ -94,50 +108,65 @@ int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo,
 	
 	// Save the tag nonce (nt)
 	nt = bytes_to_num(receivedAnswer, 4);
-	Dbprintf("uid: %x nt: %x", uid, nt);  
 
 	//  ----------------------------- crypto1 create
-  // Init cipher with key
+	if (isNested)
+		crypto1_destroy(pcs);
+
+	// Init cipher with key
 	crypto1_create(pcs, ui64Key);
 
-  // Load (plain) uid^nt into the cipher
-	crypto1_word(pcs, nt ^ uid, 0);
+	if (isNested == AUTH_NESTED) {
+		// decrypt nt with help of new key 
+		nt = crypto1_word(pcs, nt ^ uid, 1) ^ nt;
+	} else {
+		// Load (plain) uid^nt into the cipher
+		crypto1_word(pcs, nt ^ uid, 0);
+	}
+
+	// some statistic
+	if (!ntptr && (MF_DBGLEVEL >= 3))
+		Dbprintf("auth uid: %08x nt: %08x", uid, nt);  
+	
+	// save Nt
+	if (ntptr)
+		*ntptr = nt;
 
 	par = 0;
-  // Generate (encrypted) nr+parity by loading it into the cipher (Nr)
-  for (pos = 0; pos < 4; pos++)
-  {
-    mf_nr_ar[pos] = crypto1_byte(pcs, ar[pos], 0) ^ ar[pos];
+	// Generate (encrypted) nr+parity by loading it into the cipher (Nr)
+	for (pos = 0; pos < 4; pos++)
+	{
+		mf_nr_ar[pos] = crypto1_byte(pcs, ar[pos], 0) ^ ar[pos];
 		par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(ar[pos])) & 0x01) * 0x80 );
-  }	
+	}	
 		
-  // Skip 32 bits in pseudo random generator
-  nt = prng_successor(nt,32);
+	// Skip 32 bits in pseudo random generator
+	nt = prng_successor(nt,32);
 
 	//  ar+parity
-  for (pos = 4; pos < 8; pos++)
-  {
+	for (pos = 4; pos < 8; pos++)
+	{
 		nt = prng_successor(nt,8);
-    mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
+		mf_nr_ar[pos] = crypto1_byte(pcs,0x00,0) ^ (nt & 0xff);
 		par = (par >> 1)| ( ((filter(pcs->odd) ^ oddparity(nt & 0xff)) & 0x01) * 0x80 );
-  }	
+	}	
 		
-  // Transmit reader nonce and reader answer
-  ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par);
+	// Transmit reader nonce and reader answer
+	ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par);
 
-  // Receive 4 bit answer
+	// Receive 4 bit answer
 	len = ReaderReceive(receivedAnswer);
-  if (!len)
-  {
-    Dbprintf("Authentication failed. Card timeout.");
+	if (!len)
+	{
+		if (MF_DBGLEVEL >= 1)	Dbprintf("Authentication failed. Card timeout.");
 		return 2;
-  }
+	}
 	
-  memcpy(tmp4, receivedAnswer, 4);
+	memcpy(tmp4, receivedAnswer, 4);
 	ntpp = prng_successor(nt, 32) ^ crypto1_word(pcs, 0,0);
 	
 	if (ntpp != bytes_to_num(tmp4, 4)) {
-    Dbprintf("Authentication failed. Error card response.");
+		if (MF_DBGLEVEL >= 1)	Dbprintf("Authentication failed. Error card response.");
 		return 3;
 	}
 
@@ -147,26 +176,26 @@ int mifare_classic_auth(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo,
 int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) 
 {
 	// variables
-  int len;	
+	int len;	
 	uint8_t	bt[2];
 	
-  uint8_t* receivedAnswer = mifare_get_bigbufptr();
+	uint8_t* receivedAnswer = mifare_get_bigbufptr();
 	
-  // command MIFARE_CLASSIC_READBLOCK
+	// command MIFARE_CLASSIC_READBLOCK
 	len = mifare_sendcmd_short(pcs, 1, 0x30, blockNo, receivedAnswer);
 	if (len == 1) {
-		Dbprintf("Cmd Error: %02x", receivedAnswer[0]);  
+		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd Error: %02x", receivedAnswer[0]);  
 		return 1;
 	}
 	if (len != 18) {
-		Dbprintf("Cmd Error: card timeout. len: %x", len);  
+		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd Error: card timeout. len: %x", len);  
 		return 2;
 	}
 
 	memcpy(bt, receivedAnswer + 16, 2);
-  AppendCrc14443a(receivedAnswer, 16);
+	AppendCrc14443a(receivedAnswer, 16);
 	if (bt[0] != receivedAnswer[16] || bt[1] != receivedAnswer[17]) {
-		Dbprintf("Cmd CRC response error.");  
+		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd CRC response error.");  
 		return 3;
 	}
 	
@@ -177,19 +206,19 @@ int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blo
 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) 
 {
 	// variables
-  int len, i;	
+	int len, i;	
 	uint32_t pos;
-  uint32_t par = 0;
-  byte_t res;
+	uint32_t par = 0;
+	byte_t res;
 	
 	uint8_t d_block[18], d_block_enc[18];
-  uint8_t* receivedAnswer = mifare_get_bigbufptr();
+	uint8_t* receivedAnswer = mifare_get_bigbufptr();
 	
-  // command MIFARE_CLASSIC_WRITEBLOCK
+	// command MIFARE_CLASSIC_WRITEBLOCK
 	len = mifare_sendcmd_short(pcs, 1, 0xA0, blockNo, receivedAnswer);
 
 	if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
-		Dbprintf("Cmd Error: %02x", receivedAnswer[0]);  
+		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd Error: %02x", receivedAnswer[0]);  
 		return 1;
 	}
 	
@@ -198,15 +227,15 @@ int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t bl
 	
 	// crypto
 	par = 0;
-  for (pos = 0; pos < 18; pos++)
-  {
-    d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
+	for (pos = 0; pos < 18; pos++)
+	{
+		d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ d_block[pos];
 		par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(d_block[pos])) & 0x01) * 0x20000 );
-  }	
+	}	
 
-  ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par);
+	ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par);
 
-  // Receive the response
+	// Receive the response
 	len = ReaderReceive(receivedAnswer);	
 
 	res = 0;
@@ -214,7 +243,7 @@ int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t bl
 		res |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedAnswer[0], i)) << i;
 
 	if ((len != 1) || (res != 0x0A)) {
-		Dbprintf("Cmd send data2 Error: %02x", res);  
+		if (MF_DBGLEVEL >= 1)	Dbprintf("Cmd send data2 Error: %02x", res);  
 		return 2;
 	}
 	
@@ -224,14 +253,14 @@ int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t bl
 int mifare_classic_halt(struct Crypto1State *pcs, uint32_t uid) 
 {
 	// variables
-  int len;	
+	int len;	
 	
 	// Mifare HALT
-  uint8_t* receivedAnswer = mifare_get_bigbufptr();
+	uint8_t* receivedAnswer = mifare_get_bigbufptr();
 
 	len = mifare_sendcmd_short(pcs, 1, 0x50, 0x00, receivedAnswer);
-  if (len != 0) {
-		Dbprintf("halt error. response len: %x", len);  
+	if (len != 0) {
+		if (MF_DBGLEVEL >= 1)	Dbprintf("halt error. response len: %x", len);  
 		return 1;
 	}