Return to blf.h CVS log

Up to [local] / sys / crypto

Annotation of sys/crypto/blf.h, Revision 1.1.1.1

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