split lf paradox/nexwatch into own files

[proxmark3-svn] / common / crapto1 / crypto1.c

diff --git a/common/crapto1/crypto1.c b/common/crapto1/crypto1.c
index f3bb0d73fef0661a7829ac33791d5d59f1148e0f..19b71cbb1f455ef605104be7d1177721c3502b46 100644 (file)
--- a/common/crapto1/crypto1.c
+++ b/common/crapto1/crypto1.c
@@ -18,38 +18,41 @@
        Copyright (C) 2008-2008 bla <blapost@gmail.com>
 */
 #include "crapto1.h"
+
 #include <stdlib.h>
+#include "parity.h"
 
 #define SWAPENDIAN(x)\
        (x = (x >> 8 & 0xff00ff) | (x & 0xff00ff) << 8, x = x >> 16 | x << 16)
 
-#if defined(__arm__)
+#if defined(__arm__) && !defined(__linux__) && !defined(_WIN32) && !defined(__APPLE__)         // bare metal ARM Proxmark lacks malloc()/free()
 void crypto1_create(struct Crypto1State *s, uint64_t key)
 {
-#else
-struct Crypto1State * crypto1_create(uint64_t key)
-{
-       struct Crypto1State *s = malloc(sizeof(*s));
-#endif
        int i;
 
        for(i = 47;s && i > 0; i -= 2) {
                s->odd  = s->odd  << 1 | BIT(key, (i - 1) ^ 7);
                s->even = s->even << 1 | BIT(key, i ^ 7);
        }
-#if defined(__arm__)   
        return;
-#else
-       return s;
-#endif
 }
-#if defined(__arm__)
 void crypto1_destroy(struct Crypto1State *state)
 {
        state->odd = 0;
        state->even = 0;
 }
 #else
+struct Crypto1State * crypto1_create(uint64_t key)
+{
+       struct Crypto1State *s = malloc(sizeof(*s));
+       int i;
+
+       for(i = 47;s && i > 0; i -= 2) {
+               s->odd  = s->odd  << 1 | BIT(key, (i - 1) ^ 7);
+               s->even = s->even << 1 | BIT(key, i ^ 7);
+       }
+       return s;
+}
 void crypto1_destroy(struct Crypto1State *state)
 {
        free(state);
@@ -65,19 +68,16 @@ 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;
+       uint32_t feedin, t;
        uint8_t ret = filter(s->odd);
 
        feedin  = ret & !!is_encrypted;
        feedin ^= !!in;
        feedin ^= LF_POLY_ODD & s->odd;
        feedin ^= LF_POLY_EVEN & s->even;
-       s->even = s->even << 1 | parity(feedin);
+       s->even = s->even << 1 | evenparity32(feedin);
 
-       tmp = s->odd;
-       s->odd = s->even;
-       s->even = tmp;
+       t = s->odd, s->odd = s->even, s->even = t;
 
        return ret;
 }
@@ -94,8 +94,8 @@ 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);
 
        return ret;
 }