added mfkey

[proxmark3-svn] / tools / mfkey / crapto1.h

diff --git a/tools/mfkey/crapto1.h b/tools/mfkey/crapto1.h
new file mode 100755 (executable)
index 0000000..127a17d
--- /dev/null
+++ b/tools/mfkey/crapto1.h
@@ -0,0 +1,93 @@
+/*  crapto1.h
+
+    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>
+*/
+#ifndef CRAPTO1_INCLUDED
+#define CRAPTO1_INCLUDED
+#include <stdint.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct Crypto1State {uint32_t odd, even;};
+struct Crypto1State* crypto1_create(uint64_t);
+void crypto1_destroy(struct Crypto1State*);
+void crypto1_get_lfsr(struct Crypto1State*, uint64_t*);
+uint8_t crypto1_bit(struct Crypto1State*, uint8_t, int);
+uint8_t crypto1_byte(struct Crypto1State*, uint8_t, int);
+uint32_t crypto1_word(struct Crypto1State*, uint32_t, int);
+uint32_t prng_successor(uint32_t x, uint32_t n);
+
+struct Crypto1State* lfsr_recovery32(uint32_t ks2, uint32_t in);
+struct Crypto1State* lfsr_recovery64(uint32_t ks2, uint32_t ks3);
+uint32_t *lfsr_prefix_ks(uint8_t ks[8], int isodd);
+struct Crypto1State*
+lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8]);
+
+uint8_t lfsr_rollback_bit(struct Crypto1State* s, uint32_t in, int fb);
+uint8_t lfsr_rollback_byte(struct Crypto1State* s, uint32_t in, int fb);
+uint32_t lfsr_rollback_word(struct Crypto1State* s, uint32_t in, int fb);
+int nonce_distance(uint32_t from, uint32_t to);
+#define FOREACH_VALID_NONCE(N, FILTER, FSIZE)\
+       uint32_t __n = 0,__M = 0, N = 0;\
+       int __i;\
+       for(; __n < 1 << 16; N = prng_successor(__M = ++__n, 16))\
+               for(__i = FSIZE - 1; __i >= 0; __i--)\
+                       if(BIT(FILTER, __i) ^ parity(__M & 0xFF01))\
+                               break;\
+                       else if(__i)\
+                               __M = prng_successor(__M, (__i == 7) ? 48 : 8);\
+                       else 
+
+#define LF_POLY_ODD (0x29CE5C)
+#define LF_POLY_EVEN (0x870804)
+#define BIT(x, n) ((x) >> (n) & 1)
+#define BEBIT(x, n) BIT(x, (n) ^ 24)
+static inline int parity(uint32_t x)
+{
+#if !defined __i386__ || !defined __GNUC__
+       x ^= x >> 16;
+       x ^= x >> 8;
+       x ^= x >> 4;
+       return BIT(0x6996, x & 0xf);
+#else
+        asm(    "movl %1, %%eax\n"
+               "mov %%ax, %%cx\n"
+               "shrl $0x10, %%eax\n"
+               "xor %%ax, %%cx\n"
+                "xor %%ch, %%cl\n"
+                "setpo %%al\n"
+                "movzx %%al, %0\n": "=r"(x) : "r"(x): "eax","ecx");
+       return x;
+#endif
+}
+static inline int filter(uint32_t const x)
+{
+       uint32_t f;
+
+       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;
+       return BIT(0xEC57E80A, f);
+}
+#ifdef __cplusplus
+}
+#endif
+#endif