optimized loop in MifareNested (issue 36)

diff --git a/armsrc/mifarecmd.c b/armsrc/mifarecmd.c
index 4148a3c29cac13707409701e8833589d4f333335..b2b38edf91f87cf1c294c28f62507ee873059da0 100644 (file)
--- a/armsrc/mifarecmd.c
+++ b/armsrc/mifarecmd.c
@@ -417,8 +417,9 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain)
                }\r
                \r
                ncount = 0;\r
                }\r
                \r
                ncount = 0;\r

-               for (m = dmin - NS_TOLERANCE; m < dmax + NS_TOLERANCE; m++) {\r
-                       nttest = prng_successor(nt1, m);\r
+               nttest = prng_successor(nt1, dmin - NS_TOLERANCE);\r
+               for (m = dmin - NS_TOLERANCE + 1; m < dmax + NS_TOLERANCE; m++) {\r
+                       nttest = prng_successor(nttest, 1);\r

                        ks1 = nt2 ^ nttest;\r
 \r
                        if (valid_nonce(nttest, nt2, ks1, par_array) && (ncount < 11)){\r
                        ks1 = nt2 ^ nttest;\r
 \r
                        if (valid_nonce(nttest, nt2, ks1, par_array) && (ncount < 11)){\r