X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/b69adb794594cc7ea43d3aa70aab091265195abf..fc893f8e33c70e0cd7e93a7997e53f7c23fe8de3:/client/nonce2key/crapto1.c

diff --git a/client/nonce2key/crapto1.c b/client/nonce2key/crapto1.c
index 13c4c063..6d2ae9af 100644
--- a/client/nonce2key/crapto1.c
+++ b/client/nonce2key/crapto1.c
@@ -21,14 +21,20 @@
 #include <stdlib.h>
 
 #if !defined LOWMEM && defined __GNUC__
-static uint8_t filterlut[1 << 20];
+uint8_t filterlut[1 << 20];
 static void __attribute__((constructor)) fill_lut()
 {
-        uint32_t i;
-        for(i = 0; i < 1 << 20; ++i)
-                filterlut[i] = filter(i);
+	uint32_t x;
+	uint32_t f;
+	for(x = 0; x < 1 << 20; ++x) {
+		f  = 0xf22c0 >> (x       & 0xf) & 16;
+		f |= 0x6c9c0 >> (x >>  4 & 0xf) &  8;
+		f |= 0x3c8b0 >> (x >>  8 & 0xf) &  4;
+		f |= 0x1e458 >> (x >> 12 & 0xf) &  2;
+		f |= 0x0d938 >> (x >> 16 & 0xf) &  1;
+		filterlut[x] = BIT(0xEC57E80A, f);
+	}
 }
-#define filter(x) (filterlut[(x) & 0xfffff])
 #endif