X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/53d5dc643f592124676b4290c8f81e6039e9abc7..e1778858ddc53a6a82e8ee24f02e6b673687f69a:/armsrc/mifareutil.c

diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c
index 4795a7ec..1dd62951 100644
--- a/armsrc/mifareutil.c
+++ b/armsrc/mifareutil.c
@@ -121,7 +121,10 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN
 
 	// "random" reader nonce:
 	//byte_t nr[4] = {0x55, 0x41, 0x49, 0x92};
-	byte_t nr[4] = {0x01, 0x01, 0x01, 0x01};
+	fast_prand();
+	byte_t nr[4];
+	num_to_bytes(prand(), 4, nr);
+	//byte_t nr[4] = {0x01, 0x01, 0x01, 0x01};
 	
 	uint32_t nt, ntpp; // Supplied tag nonce
 	
@@ -154,7 +157,7 @@ int mifare_classic_authex(struct Crypto1State *pcs, uint32_t uid, uint8_t blockN
 
 	// some statistic
 	if (!ntptr && (MF_DBGLEVEL >= 3))
-		Dbprintf("auth uid: %08x nt: %08x", uid, nt);  
+		Dbprintf("auth uid: %08x | nr: %08x | nt: %08x", uid, nr, nt);
 	
 	// save Nt
 	if (ntptr)
@@ -564,23 +567,19 @@ int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum) {
 uint64_t emlGetKey(int sectorNum, int keyType) {
 	uint8_t key[6] = {0x00};
 	uint8_t* emCARD = BigBuf_get_EM_addr();
-	
 	memcpy(key, emCARD + 16 * (FirstBlockOfSector(sectorNum) + NumBlocksPerSector(sectorNum) - 1) + keyType * 10, 6);
 	return bytes_to_num(key, 6);
 }
 
 void emlClearMem(void) {
-	int b;
-	
 	const uint8_t trailer[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x80, 0x69, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 	const uint8_t uid[]   =   {0xe6, 0x84, 0x87, 0xf3, 0x16, 0x88, 0x04, 0x00, 0x46, 0x8e, 0x45, 0x55, 0x4d, 0x70, 0x41, 0x04};
 	uint8_t* emCARD = BigBuf_get_EM_addr();
-	
 	memset(emCARD, 0, CARD_MEMORY_SIZE);
 	
 	// fill sectors trailer data
-	for(b = 3; b < 256; b<127?(b+=4):(b+=16))
-		emlSetMem((uint8_t *)trailer, b , 1);
+	for(uint16_t b = 3; b < 256; ((b < 127) ? (b += 4) : (b += 16)))
+		emlSetMem((uint8_t *)trailer, b, 1);
 
 	// uid
 	emlSetMem((uint8_t *)uid, 0, 1);