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/*
* UFC-crypt: ultra fast crypt(3) implementation
*
* Copyright (C) 1991, 92, 93, 96, 97, 98, 2000 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with the GNU C Library; see the file COPYING.LIB. 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>
/* Encrypt characters from KEY using salt to perturb the encryption method.
* If salt begins with "$1$", md5 hashing is used instead of DES. */
extern char *crypt (const char *__key, const char *__salt);
/* Setup DES tables according KEY. */
extern void setkey (const char *__key);
/* Encrypt data in BLOCK in place if EDFLAG is zero; otherwise decrypt
block in place. */
extern void encrypt (char *__block, int __edflag);
/* Reentrant versions of the functions above. The additional argument
points to a structure where the results are placed in. */
struct crypt_data
{
/* The C and D arrays used to calculate the key schedule. */
char C[28];
char D[28];
/* The key schedule. Generated from the key. */
char KS[16][48];
/* The E bit-selection table. */
char E[48];
/* The current block, divided into 2 halves. */
char L[32], R[32];
char tempL[32];
char f[32];
/* The combination of the key and the input, before selection. */
char preS[48];
char block[66];
char iobuf[16];
/* Some stuff used by the md5 routines */
char *p;
const char *sp,*ep;
};
extern char *crypt_r (const char *__key, const char *__salt,
struct crypt_data * __data);
extern void setkey_r (const char *__key,
struct crypt_data * __data);
extern void encrypt_r (char *__block, int __edflag,
struct crypt_data * __data);
#endif /* crypt.h */
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