CHG: minor change initializing array.

[proxmark3-svn] / client / nonce2key / crapto1.c

diff --git a/client/nonce2key/crapto1.c b/client/nonce2key/crapto1.c
index 13c4c063af078fb4d155b7f227d26eda6b8fa9c9..dfad1c4048507b67ae2d2c77afcfa8a312f9715c 100644 (file)
--- a/client/nonce2key/crapto1.c
+++ b/client/nonce2key/crapto1.c
@@ -21,14 +21,20 @@
 #include <stdlib.h>\r
 \r
 #if !defined LOWMEM && defined __GNUC__\r
-static uint8_t filterlut[1 << 20];\r
+uint8_t filterlut[1 << 20];\r
 static void __attribute__((constructor)) fill_lut()\r
 {\r
-        uint32_t i;\r
-        for(i = 0; i < 1 << 20; ++i)\r
-                filterlut[i] = filter(i);\r
+       uint32_t x;\r
+       uint32_t f;\r
+       for(x = 0; x < 1 << 20; ++x) {\r
+               f  = 0xf22c0 >> (x       & 0xf) & 16;\r
+               f |= 0x6c9c0 >> (x >>  4 & 0xf) &  8;\r
+               f |= 0x3c8b0 >> (x >>  8 & 0xf) &  4;\r
+               f |= 0x1e458 >> (x >> 12 & 0xf) &  2;\r
+               f |= 0x0d938 >> (x >> 16 & 0xf) &  1;\r
+               filterlut[x] = BIT(0xEC57E80A, f);\r
+       }\r
 }\r
-#define filter(x) (filterlut[(x) & 0xfffff])\r
 #endif\r
 \r
 \r
@@ -399,18 +405,66 @@ void lfsr_rollback_bit(struct Crypto1State *s, uint32_t in, int fb)
  */\r
 void lfsr_rollback_byte(struct Crypto1State *s, uint32_t in, int fb)\r
 {\r
-       int i;\r
+/*     int i;\r
        for (i = 7; i >= 0; --i)\r
                lfsr_rollback_bit(s, BEBIT(in, i), fb);\r
+*/\r
+// unfold loop 20160112\r
+       lfsr_rollback_bit(s, BEBIT(in, 7), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 6), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 5), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 4), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 3), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 2), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 1), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 0), fb);\r
 }\r
 /** lfsr_rollback_word\r
  * Rollback the shift register in order to get previous states\r
  */\r
 void lfsr_rollback_word(struct Crypto1State *s, uint32_t in, int fb)\r
 {\r
+/*\r
        int i;\r
        for (i = 31; i >= 0; --i)\r
                lfsr_rollback_bit(s, BEBIT(in, i), fb);\r
+*/\r
+// unfold loop 20160112\r
+       lfsr_rollback_bit(s, BEBIT(in, 31), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 30), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 29), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 28), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 27), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 26), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 25), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 24), fb);\r
+\r
+       lfsr_rollback_bit(s, BEBIT(in, 23), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 22), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 21), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 20), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 19), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 18), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 17), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 16), fb);\r
+\r
+       lfsr_rollback_bit(s, BEBIT(in, 15), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 14), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 13), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 12), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 11), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 10), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 9), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 8), fb);\r
+\r
+       lfsr_rollback_bit(s, BEBIT(in, 7), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 6), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 5), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 4), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 3), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 2), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 1), fb);\r
+       lfsr_rollback_bit(s, BEBIT(in, 0), fb);\r
 }\r
 \r
 /** nonce_distance\r