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- /* $OpenBSD: blf.h,v 1.4 1998/08/10 18:40:53 provos Exp $ */
- /*
- * Blowfish - a fast block cipher designed by Bruce Schneier
- *
- * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
- * All rights reserved.
- *
- * 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 above 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 software developed by Niels Provos.
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
- */
-
- #ifndef _BLF_H_
- #define _BLF_H_
-
- /* Schneier states the maximum key length to be 56 bytes.
- * The way how the subkeys are initalized by the key up
- * to (N+2)*4 i.e. 72 bytes are utilized.
- * Warning: For normal blowfish encryption only 56 bytes
- * of the key affect all cipherbits.
- */
-
- #define BLF_N 16 /* Number of Subkeys */
- #define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */
-
- /* Blowfish context */
- typedef struct BlowfishContext {
- u_int32_t S[4][256]; /* S-Boxes */
- u_int32_t P[BLF_N + 2]; /* Subkeys */
- } blf_ctx;
-
- /* Raw access to customized Blowfish
- * blf_key is just:
- * Blowfish_initstate( state )
- * Blowfish_expand0state( state, key, keylen )
- */
-
- void Blowfish_encipher __P((blf_ctx *, u_int32_t *, u_int32_t *));
- void Blowfish_decipher __P((blf_ctx *, u_int32_t *, u_int32_t *));
- void Blowfish_initstate __P((blf_ctx *));
- void Blowfish_expand0state __P((blf_ctx *, const u_int8_t *, u_int16_t));
- void Blowfish_expandstate
- __P((blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t));
-
- /* Standard Blowfish */
-
- void blf_key __P((blf_ctx *, const u_int8_t *, u_int16_t));
- void blf_enc __P((blf_ctx *, u_int32_t *, u_int16_t));
- void blf_dec __P((blf_ctx *, u_int32_t *, u_int16_t));
-
- void blf_ecb_encrypt __P((blf_ctx *, u_int8_t *, u_int32_t));
- void blf_ecb_decrypt __P((blf_ctx *, u_int8_t *, u_int32_t));
-
- void blf_cbc_encrypt __P((blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t));
- void blf_cbc_decrypt __P((blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t));
-
- /* Converts u_int8_t to u_int32_t */
- u_int32_t Blowfish_stream2word __P((const u_int8_t *, u_int16_t , u_int16_t *));
-
- #endif
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