Code cleanup: deduplicate crapto1 library (#228)

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

diff --git a/tools/mfkey/crypto1.c b/tools/mfkey/crypto1.c
deleted file mode 100755 (executable)
index e2aab71..0000000
--- a/tools/mfkey/crypto1.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*  crypto1.c
-
-    This program is free software; you can redistribute it and/or
-    modify it under the terms of the GNU General Public License
-    as published by the Free Software Foundation; either version 2
-    of the License, or (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
-    MA  02110-1301, US
-
-    Copyright (C) 2008-2008 bla <blapost@gmail.com>
-*/
-#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;
-
-       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);
-}
-void crypto1_get_lfsr(struct Crypto1State *state, uint64_t *lfsr)
-{
-       int i;
-       for(*lfsr = 0, i = 23; i >= 0; --i) {
-               *lfsr = *lfsr << 1 | BIT(state->odd, i ^ 3);
-               *lfsr = *lfsr << 1 | BIT(state->even, i ^ 3);
-       }
-}
-uint8_t crypto1_bit(struct Crypto1State *s, uint8_t in, int is_encrypted)
-{
-       uint32_t feedin;
-       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->odd ^= (s->odd ^= s->even, s->even ^= s->odd);
-
-       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;
-
-       return ret;
-}
-uint32_t crypto1_word(struct Crypto1State *s, uint32_t in, int is_encrypted)
-{
-       uint32_t i, ret = 0;
-
-       for (i = 0; i < 32; ++i)
-               ret |= crypto1_bit(s, BEBIT(in, i), is_encrypted) << (i ^ 24);
-
-       return ret;
-}
-
-/* prng_successor
- * helper used to obscure the keystream during authentication
- */
-uint32_t prng_successor(uint32_t x, uint32_t n)
-{
-       SWAPENDIAN(x);
-       while(n--)
-               x = x >> 1 | (x >> 16 ^ x >> 18 ^ x >> 19 ^ x >> 21) << 31;
-
-       return SWAPENDIAN(x);
-}