/* crypto/bf/blowfish.h */
/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@mincom.oz.au).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@mincom.oz.au).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@mincom.oz.au)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@mincom.oz.au)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#ifndef HEADER_BLOWFISH_H
#define HEADER_BLOWFISH_H

#ifdef  __cplusplus
extern "C" {
#endif

#define BF_ENCRYPT      1
#define BF_DECRYPT      0

/* If you make this 'unsigned int' the pointer variants will work on
 * the Alpha, otherwise they will not.  Strangly using the '8 byte'
 * BF_LONG and the default 'non-pointer' inner loop is the best configuration
 * for the Alpha */
#define BF_LONG unsigned long

#define BF_ROUNDS       16
#define BF_BLOCK        8

typedef struct bf_key_st
        {
        BF_LONG P[BF_ROUNDS+2];
        BF_LONG S[4*256];
        } BF_KEY;

#ifndef NOPROTO
 
void BF_set_key(BF_KEY *key, int len, unsigned char *data);
void BF_ecb_encrypt(unsigned char *in,unsigned char *out,BF_KEY *key,
        int encrypt);
void BF_encrypt(BF_LONG *data,BF_KEY *key,int encrypt);
void BF_cbc_encrypt(unsigned char *in, unsigned char *out, long length,
        BF_KEY *ks, unsigned char *iv, int encrypt);
void BF_cfb64_encrypt(unsigned char *in, unsigned char *out, long length,
        BF_KEY *schedule, unsigned char *ivec, int *num, int encrypt);
void BF_ofb64_encrypt(unsigned char *in, unsigned char *out, long length,
        BF_KEY *schedule, unsigned char *ivec, int *num);
char *BF_options(void);

#else

void BF_set_key();
void BF_ecb_encrypt();
void BF_encrypt();
void BF_cbc_encrypt();
void BF_cfb64_encrypt();
void BF_ofb64_encrypt();
char *BF_options();

#endif

#ifdef  __cplusplus
}
#endif

#endif
