X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/ce56e6c1c22340b80e78dbc8c32fa50946500f16..b7f40ee2ad734d6081abf14347748a841c69d4b8:/armsrc/iso14443a.c

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 570f028c..7c0913d8 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -1866,6 +1866,9 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
 			memset(uid_ptr,0,10);
 	}
 
+	// reset the PCB block number
+	iso14_pcb_blocknum = 0;
+	
 	// check for proprietary anticollision:
 	if ((resp[0] & 0x1F) == 0) return 3;
 	
@@ -1977,12 +1980,8 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
 		p_hi14a_card->ats_len = len;
 	}
 
-	// reset the PCB block number
-	iso14_pcb_blocknum = 0;
-
 	// set default timeout based on ATS
 	iso14a_set_ATS_timeout(resp);
-
 	return 1;	
 }
 
@@ -2145,29 +2144,24 @@ int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
 	uint32_t nttmp1 = nt1;
 	uint32_t nttmp2 = nt2;
 
-	for (uint16_t i = 1; i < 32768/8; ++i) {
+	// 0xFFFF -- Half up and half down to find distance between nonces
+	for (uint16_t i = 1; i < 32768/8; i += 8) {
 		nttmp1 = prng_successor(nttmp1, 1);	if (nttmp1 == nt2) return i;
-		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -i;
-		
 		nttmp1 = prng_successor(nttmp1, 1);	if (nttmp1 == nt2) return i+1;
-		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+1);
-		
 		nttmp1 = prng_successor(nttmp1, 1);	if (nttmp1 == nt2) return i+2;
-		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+2);
-
 		nttmp1 = prng_successor(nttmp1, 1);	if (nttmp1 == nt2) return i+3;
-		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+3);
-		
 		nttmp1 = prng_successor(nttmp1, 1);	if (nttmp1 == nt2) return i+4;
-		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+4);
-		
 		nttmp1 = prng_successor(nttmp1, 1);	if (nttmp1 == nt2) return i+5;
-		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+5);
-		
 		nttmp1 = prng_successor(nttmp1, 1);	if (nttmp1 == nt2) return i+6;
-		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+6);
-		
 		nttmp1 = prng_successor(nttmp1, 1);	if (nttmp1 == nt2) return i+7;
+		
+		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -i;
+		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+1);
+		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+2);
+		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+3);
+		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+4);
+		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+5);
+		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+6);
 		nttmp2 = prng_successor(nttmp2, 1);	if (nttmp2 == nt1) return -(i+7);		
 	}
 	// either nt1 or nt2 are invalid nonces	
@@ -2221,7 +2215,7 @@ void ReaderMifare(bool first_try, uint8_t block, uint8_t keytype ) {
 	
 	BigBuf_free(); BigBuf_Clear_ext(false);	
 	clear_trace();
-	set_tracing(TRUE);	
+	set_tracing(FALSE);	
 	iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
 
 	sync_time = GetCountSspClk() & 0xfffffff8;