Update README.md

[proxmark3-svn] / tools / nonce2key / crypto1.c

diff --git a/tools/nonce2key/crypto1.c b/tools/nonce2key/crypto1.c
index fbf888987c8539eee9d8f411daa786938ec243aa..f49a07225a1753d21bfebcb3b0b1ad65229cfd66 100644 (file)
--- a/tools/nonce2key/crypto1.c
+++ b/tools/nonce2key/crypto1.c
@@ -20,15 +20,16 @@
 #include "crapto1.h"
 #include <stdlib.h>
 
-#define SWAPENDIAN(x)\
-       (x = (x >> 8 & 0xff00ff) | (x & 0xff00ff) << 8, x = x >> 16 | x << 16)
-
 struct Crypto1State * crypto1_create(uint64_t key)
 {
        struct Crypto1State *s = malloc(sizeof(*s));
-       int i;
+       if ( !s ) return NULL;
 
-       for(i = 47;s && i > 0; i -= 2) {
+       s->odd = s->even = 0;   
+       
+       int i;
+       //for(i = 47;s && i > 0; i -= 2) {
+       for(i = 47; i > 0; i -= 2) {
                s->odd  = s->odd  << 1 | BIT(key, (i - 1) ^ 7);
                s->even = s->even << 1 | BIT(key, i ^ 7);
        }
@@ -49,6 +50,7 @@ void crypto1_get_lfsr(struct Crypto1State *state, uint64_t *lfsr)
 uint8_t crypto1_bit(struct Crypto1State *s, uint8_t in, int is_encrypted)
 {
        uint32_t feedin;
+       uint32_t tmp;
        uint8_t ret = filter(s->odd);
 
        feedin  = ret & !!is_encrypted;
@@ -57,26 +59,77 @@ uint8_t crypto1_bit(struct Crypto1State *s, uint8_t in, int is_encrypted)
        feedin ^= LF_POLY_EVEN & s->even;
        s->even = s->even << 1 | parity(feedin);
 
-       s->odd ^= (s->odd ^= s->even, s->even ^= s->odd);
+       tmp = s->odd;
+       s->odd = s->even;
+       s->even = tmp;
 
        return ret;
 }
 uint8_t crypto1_byte(struct Crypto1State *s, uint8_t in, int is_encrypted)
 {
+       /*
        uint8_t i, ret = 0;
 
        for (i = 0; i < 8; ++i)
                ret |= crypto1_bit(s, BIT(in, i), is_encrypted) << i;
-
+       */
+// unfold loop 20161012
+       uint8_t ret = 0;
+       ret |= crypto1_bit(s, BIT(in, 0), is_encrypted) << 0;
+       ret |= crypto1_bit(s, BIT(in, 1), is_encrypted) << 1;
+       ret |= crypto1_bit(s, BIT(in, 2), is_encrypted) << 2;
+       ret |= crypto1_bit(s, BIT(in, 3), is_encrypted) << 3;
+       ret |= crypto1_bit(s, BIT(in, 4), is_encrypted) << 4;
+       ret |= crypto1_bit(s, BIT(in, 5), is_encrypted) << 5;
+       ret |= crypto1_bit(s, BIT(in, 6), is_encrypted) << 6;
+       ret |= crypto1_bit(s, BIT(in, 7), is_encrypted) << 7;
        return ret;
 }
 uint32_t crypto1_word(struct Crypto1State *s, uint32_t in, int is_encrypted)
 {
+       /*
        uint32_t i, ret = 0;
 
-       for (i = 0; i < 4; ++i, in <<= 8)
-               ret = ret << 8 | crypto1_byte(s, in >> 24, is_encrypted);
-
+       for (i = 0; i < 32; ++i)
+               ret |= crypto1_bit(s, BEBIT(in, i), is_encrypted) << (i ^ 24);
+*/
+//unfold loop 2016012
+       uint32_t ret = 0;
+       ret |= crypto1_bit(s, BEBIT(in, 0), is_encrypted) << (0 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 1), is_encrypted) << (1 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 2), is_encrypted) << (2 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 3), is_encrypted) << (3 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 4), is_encrypted) << (4 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 5), is_encrypted) << (5 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 6), is_encrypted) << (6 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 7), is_encrypted) << (7 ^ 24);
+       
+       ret |= crypto1_bit(s, BEBIT(in, 8), is_encrypted) << (8 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 9), is_encrypted) << (9 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 10), is_encrypted) << (10 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 11), is_encrypted) << (11 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 12), is_encrypted) << (12 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 13), is_encrypted) << (13 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 14), is_encrypted) << (14 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 15), is_encrypted) << (15 ^ 24);
+
+       ret |= crypto1_bit(s, BEBIT(in, 16), is_encrypted) << (16 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 17), is_encrypted) << (17 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 18), is_encrypted) << (18 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 19), is_encrypted) << (19 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 20), is_encrypted) << (20 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 21), is_encrypted) << (21 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 22), is_encrypted) << (22 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 23), is_encrypted) << (23 ^ 24);
+
+       ret |= crypto1_bit(s, BEBIT(in, 24), is_encrypted) << (24 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 25), is_encrypted) << (25 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 26), is_encrypted) << (26 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 27), is_encrypted) << (27 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 28), is_encrypted) << (28 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 29), is_encrypted) << (29 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 30), is_encrypted) << (30 ^ 24);
+       ret |= crypto1_bit(s, BEBIT(in, 31), is_encrypted) << (31 ^ 24);
        return ret;
 }