/*
* UFC-crypt: ultra fast crypt(3) implementation
*
* Copyright (C) 1991,92,93,96,97,98,2000,2004 Free Software Foundation, Inc.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* The GNU C Library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU C Library; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA.
*
* @(#)crypt.h 1.5 12/20/96
*
*/

#ifndef _CRYPT_H
#define _CRYPT_H 1

#include <features.h>

__BEGIN_DECLS

/* Encrypt at most 8 characters from KEY using salt to perturb DES. */
extern char *crypt (__const char *__key, __const char *__salt)
__THROW __nonnull ((1, 2));

/* Setup DES tables according KEY. */
extern void setkey (__const char *__key) __THROW __nonnull ((1));

/* Encrypt data in BLOCK in place if EDFLAG is zero; otherwise decrypt
block in place. */
extern void encrypt (char *__block, int __edflag) __THROW __nonnull ((1));

#ifdef __USE_GNU
/* Reentrant versions of the functions above. The additional argument
points to a structure where the results are placed in. */
struct crypt_data
{
char keysched[16 * 8];
char sb0[32768];
char sb1[32768];
char sb2[32768];
char sb3[32768];
/* end-of-aligment-critical-data */
char crypt_3_buf[14];
char current_salt[2];
long int current_saltbits;
int direction, initialized;
};

extern char *crypt_r (__const char *__key, __const char *__salt,
struct crypt_data * __restrict __data)
__THROW __nonnull ((1, 2, 3));

extern void setkey_r (__const char *__key,
struct crypt_data * __restrict __data)
__THROW __nonnull ((1, 2));

extern void encrypt_r (char *__block, int __edflag,
struct crypt_data * __restrict __data)
__THROW __nonnull ((1, 3));
#endif

__END_DECLS

#endif /* crypt.h */