Return to blf.h CVS log

Up to [local] / sys / crypto

Annotation of sys/crypto/blf.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: blf.h,v 1.6 2007/02/21 19:25:40 grunk Exp $   */
        !             2:
        !             3: /*
        !             4:  * Blowfish - a fast block cipher designed by Bruce Schneier
        !             5:  *
        !             6:  * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
        !             7:  * All rights reserved.
        !             8:  *
        !             9:  * Redistribution and use in source and binary forms, with or without
        !            10:  * modification, are permitted provided that the following conditions
        !            11:  * are met:
        !            12:  * 1. Redistributions of source code must retain the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer.
        !            14:  * 2. Redistributions in binary form must reproduce the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer in the
        !            16:  *    documentation and/or other materials provided with the distribution.
        !            17:  * 3. All advertising materials mentioning features or use of this software
        !            18:  *    must display the following acknowledgement:
        !            19:  *      This product includes software developed by Niels Provos.
        !            20:  * 4. The name of the author may not be used to endorse or promote products
        !            21:  *    derived from this software without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            24:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            25:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            26:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            27:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            28:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            29:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            30:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            31:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            32:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            33:  */
        !            34:
        !            35: #ifndef _BLF_H_
        !            36: #define _BLF_H_
        !            37:
        !            38: /* Schneier states the maximum key length to be 56 bytes.
        !            39:  * The way how the subkeys are initialized by the key up
        !            40:  * to (N+2)*4 i.e. 72 bytes are utilized.
        !            41:  * Warning: For normal blowfish encryption only 56 bytes
        !            42:  * of the key affect all cipherbits.
        !            43:  */
        !            44:
        !            45: #define BLF_N  16                      /* Number of Subkeys */
        !            46: #define BLF_MAXKEYLEN ((BLF_N-2)*4)    /* 448 bits */
        !            47: #define BLF_MAXUTILIZED ((BLF_N+2)*4)  /* 576 bits */
        !            48:
        !            49: /* Blowfish context */
        !            50: typedef struct BlowfishContext {
        !            51:        u_int32_t S[4][256];    /* S-Boxes */
        !            52:        u_int32_t P[BLF_N + 2]; /* Subkeys */
        !            53: } blf_ctx;
        !            54:
        !            55: /* Raw access to customized Blowfish
        !            56:  *     blf_key is just:
        !            57:  *     Blowfish_initstate( state )
        !            58:  *     Blowfish_expand0state( state, key, keylen )
        !            59:  */
        !            60:
        !            61: void Blowfish_encipher(blf_ctx *, u_int32_t *);
        !            62: void Blowfish_decipher(blf_ctx *, u_int32_t *);
        !            63: void Blowfish_initstate(blf_ctx *);
        !            64: void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t);
        !            65: void Blowfish_expandstate(blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t);
        !            66:
        !            67: /* Standard Blowfish */
        !            68:
        !            69: void blf_key(blf_ctx *, const u_int8_t *, u_int16_t);
        !            70: void blf_enc(blf_ctx *, u_int32_t *, u_int16_t);
        !            71: void blf_dec(blf_ctx *, u_int32_t *, u_int16_t);
        !            72:
        !            73: /* Converts u_int8_t to u_int32_t */
        !            74: u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t ,
        !            75:                                    u_int16_t *);
        !            76:
        !            77: void blf_ecb_encrypt(blf_ctx *, u_int8_t *, u_int32_t);
        !            78: void blf_ecb_decrypt(blf_ctx *, u_int8_t *, u_int32_t);
        !            79:
        !            80: void blf_cbc_encrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
        !            81: void blf_cbc_decrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
        !            82: #endif