/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * lib/crypto/des/des_int.h
 *
 * Copyright 1987, 1988, 1990, 2002 by the Massachusetts Institute of
 * Technology.  All Rights Reserved.
 *
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 *
 * Private include file for the Data Encryption Standard library.
 */

/*
 * Copyright (C) 1998 by the FundsXpress, INC.
 *
 * All rights reserved.
 *
 * Export of this software from the United States of America may require
 * a specific license from the United States Government.  It is the
 * responsibility of any person or organization contemplating export to
 * obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of FundsXpress. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  FundsXpress makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/* only do the whole thing once  */
#ifndef DES_INTERNAL_DEFS
#define DES_INTERNAL_DEFS


#include "k5-int.h"
/*
 * Begin "mit-des.h"
 */
#ifndef KRB5_MIT_DES__
#define KRB5_MIT_DES__

#if 0 /* SUNW14resync */
#define KRB5INT_CRYPTO_DES_INT  /* skip krb4-specific DES stuff */
#include "kerberosIV/des.h"     /* for des_key_schedule, etc. */
#undef KRB5INT_CRYPTO_DES_INT   /* don't screw other inclusions of des.h */
#endif

/*
 * SUNW14resync
 * Solaris Kerberos does not do krb4 so we don't have its des.h file
 * but we need a few symbols from it so we include them here.
 */
/* begin: from mit kerberosIV/des.h */
#if UINT_MAX >= 0xFFFFFFFFUL
#define DES_INT32 int
#define DES_UINT32 unsigned int
#else
#define DES_INT32 long
#define DES_UINT32 unsigned long
#endif
/* end: from mit kerberosIV/des.h */

typedef unsigned char des_cblock[8];    /* crypto-block size */
typedef struct des_ks_struct {  DES_INT32 _[2]; } des_key_schedule[16];


typedef des_cblock mit_des_cblock;
typedef des_key_schedule mit_des_key_schedule;

/* Triple-DES structures */
typedef mit_des_cblock          mit_des3_cblock[3];
typedef mit_des_key_schedule    mit_des3_key_schedule[3];

#define MIT_DES_ENCRYPT 1
#define MIT_DES_DECRYPT 0

#define K5ROUNDUP(x, align)     (-(-(x) & -(align)))

/* the first byte of the key is already in the keyblock */

#define MIT_DES_BLOCK_LENGTH            (8*sizeof(krb5_octet))
#define MIT_DES_CBC_CRC_PAD_MINIMUM     CRC32_CKSUM_LENGTH
/* This used to be 8*sizeof(krb5_octet) */
#define MIT_DES_KEYSIZE                 8

#define MIT_DES_CBC_CKSUM_LENGTH        (4*sizeof(krb5_octet))

/*
 * Check if k5-int.h has been included before us.  If so, then check to see
 * that our view of the DES key size is the same as k5-int.h's.
 */
#ifdef  KRB5_MIT_DES_KEYSIZE
#if     MIT_DES_KEYSIZE != KRB5_MIT_DES_KEYSIZE
error(MIT_DES_KEYSIZE does not equal KRB5_MIT_DES_KEYSIZE)
#endif  /* MIT_DES_KEYSIZE != KRB5_MIT_DES_KEYSIZE */
#endif  /* KRB5_MIT_DES_KEYSIZE */
#endif /* KRB5_MIT_DES__ */
/*
 * End "mit-des.h"
 */

#ifndef _KERNEL
/* afsstring2key.c */
extern krb5_error_code mit_afs_string_to_key
(krb5_context context,
                krb5_keyblock *keyblock,
                const krb5_data  *data,
                const krb5_data  *salt);
#endif

/* f_cksum.c */
extern unsigned long mit_des_cbc_cksum
( krb5_context context,
        const krb5_octet  *, krb5_octet  *, unsigned long ,
        krb5_keyblock *, const krb5_octet  *);

/* f_cbc.c */
extern int mit_des_cbc_encrypt
(krb5_context context,
        const mit_des_cblock  *in,
        mit_des_cblock  *out, long length,
        krb5_keyblock *key,
        mit_des_cblock ivec,
        int encrypt);

#define mit_des_zeroblock krb5int_c_mit_des_zeroblock
extern const mit_des_cblock mit_des_zeroblock;

/* fin_rndkey.c */
extern krb5_error_code mit_des_finish_random_key
    ( const krb5_encrypt_block *,
                krb5_pointer *);

/* finish_key.c */
extern krb5_error_code mit_des_finish_key
    ( krb5_encrypt_block *);

/* key_parity.c */
extern void mit_des_fixup_key_parity (mit_des_cblock );
extern int mit_des_check_key_parity (mit_des_cblock );

/* process_ky.c */
extern krb5_error_code mit_des_process_key
    ( krb5_encrypt_block *,  const krb5_keyblock *);

/* string2key.c */
extern krb5_error_code mit_des_string_to_key
    ( const krb5_encrypt_block *,
               krb5_keyblock *, const krb5_data *, const krb5_data *);

/* weak_key.c */
extern int mit_des_is_weak_key (mit_des_cblock );

/* cmb_keys.c */
krb5_error_code mit_des_combine_subkeys
    (const krb5_keyblock *, const krb5_keyblock *,
               krb5_keyblock **);

/* f_pcbc.c */
int mit_des_pcbc_encrypt ();

/* f_sched.c */
int mit_des_make_key_sched(mit_des_cblock, mit_des_key_schedule);


/* misc.c */
extern void swap_bits (char *);
extern unsigned long long_swap_bits (unsigned long );
extern unsigned long swap_six_bits_to_ansi (unsigned long );
extern unsigned long swap_four_bits_to_ansi (unsigned long );
extern unsigned long swap_bit_pos_1 (unsigned long );
extern unsigned long swap_bit_pos_0 (unsigned long );
extern unsigned long swap_bit_pos_0_to_ansi (unsigned long );
extern unsigned long rev_swap_bit_pos_0 (unsigned long );
extern unsigned long swap_byte_bits (unsigned long );
extern unsigned long swap_long_bytes_bit_number (unsigned long );
#ifdef FILE
/* XXX depends on FILE being a #define! */
extern void test_set (FILE *, const char *, int, const char *, int);
#endif

/* d3_cbc.c */
extern int mit_des3_cbc_encrypt
        (krb5_context context,
         const mit_des_cblock  *in,
         mit_des_cblock  *out,
         unsigned long length,
         krb5_keyblock *key,
         const mit_des_cblock ivec,
         int enc);

/* d3_procky.c */
extern krb5_error_code mit_des3_process_key
        (krb5_encrypt_block * eblock,
                   const krb5_keyblock * keyblock);

/* d3_str2ky.c */
extern krb5_error_code mit_des3_string_to_key
        (const krb5_encrypt_block * eblock,
                   krb5_keyblock * keyblock,
                   const krb5_data * data,
                   const krb5_data * salt);

/* u_nfold.c */
extern krb5_error_code mit_des_n_fold
        (const krb5_octet * input,
                   const size_t in_len,
                   krb5_octet * output,
                   const size_t out_len);

extern krb5_error_code mit_des_set_random_sequence_number
        (const krb5_data * sequence,
                   krb5_pointer random_state);

#endif  /*DES_INTERNAL_DEFS*/