1  /*
       2   * FreeSec: libcrypt for NetBSD
       3   *
       4   * Copyright (c) 1994 David Burren
       5   * All rights reserved.
       6   *
       7   * Adapted for FreeBSD-2.0 by Geoffrey M. Rehmet
       8   *      this file should now *only* export crypt(), in order to make
       9   *      binaries of libcrypt exportable from the USA
      10   *
      11   * Adapted for FreeBSD-4.0 by Mark R V Murray
      12   *      this file should now *only* export crypt_des(), in order to make
      13   *      a module that can be optionally included in libcrypt.
      14   *
      15   * Adapted for libxcrypt by Zack Weinberg, 2017
      16   *      see notes in des.c
      17   *
      18   * Redistribution and use in source and binary forms, with or without
      19   * modification, are permitted provided that the following conditions
      20   * are met:
      21   * 1. Redistributions of source code must retain the above copyright
      22   *    notice, this list of conditions and the following disclaimer.
      23   * 2. Redistributions in binary form must reproduce the above copyright
      24   *    notice, this list of conditions and the following disclaimer in the
      25   *    documentation and/or other materials provided with the distribution.
      26   * 3. Neither the name of the author nor the names of other contributors
      27   *    may be used to endorse or promote products derived from this software
      28   *    without specific prior written permission.
      29   *
      30   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
      31   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      32   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      33   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
      34   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      35   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      36   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      37   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      38   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      39   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      40   * SUCH DAMAGE.
      41   *
      42   * This is an original implementation of the DES and the crypt(3) interfaces
      43   * by David Burren <davidb@werj.com.au>.
      44   */
      45  
      46  #ifndef _CRYPT_ALG_DES_H
      47  #define _CRYPT_ALG_DES_H 1
      48  
      49  /* des.c */
      50  
      51  struct des_ctx
      52  {
      53    uint32_t keysl[16];
      54    uint32_t keysr[16];
      55    uint32_t saltbits;
      56  };
      57  
      58  extern void des_set_key (struct des_ctx *restrict ctx,
      59                           const unsigned char key[MIN_SIZE(8)]);
      60  extern void des_set_salt (struct des_ctx *restrict ctx,
      61                            uint32_t salt);
      62  extern void des_crypt_block (struct des_ctx *restrict ctx,
      63                               unsigned char *out, const unsigned char *in,
      64                               unsigned int count, bool decrypt);
      65  
      66  /* des-tables.c (generated by des-mktables) */
      67  extern const uint8_t m_sbox[4][4096];
      68  extern const uint32_t ip_maskl[8][256], ip_maskr[8][256];
      69  extern const uint32_t fp_maskl[8][256], fp_maskr[8][256];
      70  extern const uint32_t key_perm_maskl[8][128], key_perm_maskr[8][128];
      71  extern const uint32_t comp_maskl[8][128], comp_maskr[8][128];
      72  extern const uint32_t psbox[4][256];
      73  
      74  #endif /* alg-des.h */