cvs.zerfleddert.de Git - proxmark3-svn/blob - client/hardnested/hardnested_bitarray_core.h

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2016, 2017 by piwi
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Implements a card only attack based on crypto text (encrypted nonces
   9 // received during a nested authentication) only. Unlike other card only
  10 // attacks this doesn't rely on implementation errors but only on the
  11 // inherent weaknesses of the crypto1 cypher. Described in
  12 //   Carlo Meijer, Roel Verdult, "Ciphertext-only Cryptanalysis on Hardened
  13 //   Mifare Classic Cards" in Proceedings of the 22nd ACM SIGSAC Conference on
  14 //   Computer and Communications Security, 2015
  15 //-----------------------------------------------------------------------------
  16 //
  17 // brute forcing is based on @aczids bitsliced brute forcer
  18 // https://github.com/aczid/crypto1_bs with some modifications. Mainly:
  19 // - don't rollback. Start with 2nd byte of nonce instead
  20 // - reuse results of filter subfunctions
  21 // - reuse results of previous nonces if some first bits are identical
  22 //
  23 //-----------------------------------------------------------------------------
  24 // aczid's Copyright notice:
  25 //
  26 // Bit-sliced Crypto-1 brute-forcing implementation
  27 // Builds on the data structures returned by CraptEV1 craptev1_get_space(nonces, threshold, uid)
  28 /*
  29 Copyright (c) 2015-2016 Aram Verstegen
  30
  31 Permission is hereby granted, free of charge, to any person obtaining a copy
  32 of this software and associated documentation files (the "Software"), to deal
  33 in the Software without restriction, including without limitation the rights
  34 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  35 copies of the Software, and to permit persons to whom the Software is
  36 furnished to do so, subject to the following conditions:
  37
  38 The above copyright notice and this permission notice shall be included in
  39 all copies or substantial portions of the Software.
  40
  41 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  42 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  43 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  44 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  45 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  46 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  47 THE SOFTWARE.
  48 */
  49
  50 #ifndef HARDNESTED_BITARRAY_CORE_H__
  51 #define HARDNESTED_BITARRAY_CORE_H__
  52
  53 #include <stdint.h>
  54
  55 extern uint32_t *malloc_bitarray(uint32_t x);
  56 extern void free_bitarray(uint32_t *x);
  57 extern uint32_t bitcount(uint32_t a);
  58 extern uint32_t count_states(uint32_t *A);
  59 extern void bitarray_AND(uint32_t *A, uint32_t *B);
  60 extern void bitarray_low20_AND(uint32_t *A, uint32_t *B);
  61 extern uint32_t count_bitarray_AND(uint32_t *A, uint32_t *B);
  62 extern uint32_t count_bitarray_low20_AND(uint32_t *A, uint32_t *B);
  63 extern void bitarray_AND4(uint32_t *A, uint32_t *B, uint32_t *C, uint32_t *D);
  64 extern void bitarray_OR(uint32_t *A, uint32_t *B);
  65 extern uint32_t count_bitarray_AND2(uint32_t *A, uint32_t *B);
  66 extern uint32_t count_bitarray_AND3(uint32_t *A, uint32_t *B, uint32_t *C);
  67 extern uint32_t count_bitarray_AND4(uint32_t *A, uint32_t *B, uint32_t *C, uint32_t *D);
  68
  69 #endif