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Annotation of src/include/blf.h, Revision 1.6

1.6     ! millert     1: /* $OpenBSD: blf.h,v 1.5 2000/12/21 16:35:32 aaron Exp $ */
1.1       provos      2: /*
                      3:  * Blowfish - a fast block cipher designed by Bruce Schneier
                      4:  *
                      5:  * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
1.2       provos      6:  * All rights reserved.
1.1       provos      7:  *
1.2       provos      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
1.3       provos     18:  *      This product includes software developed by Niels Provos.
1.2       provos     19:  * 4. The name of the author may not be used to endorse or promote products
                     20:  *    derived from this software without specific prior written permission.
                     21:  *
                     22:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     23:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     24:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     25:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     26:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     27:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     28:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     29:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     30:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     31:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.1       provos     32:  */
                     33:
                     34: #ifndef _BLF_H_
                     35: #define _BLF_H_
                     36:
1.5       aaron      37: /* Schneier specifies a maximum key length of 56 bytes.
                     38:  * This ensures that every key bit affects every cipher
                     39:  * bit.  However, the subkeys can hold up to 72 bytes.
1.1       provos     40:  * Warning: For normal blowfish encryption only 56 bytes
                     41:  * of the key affect all cipherbits.
                     42:  */
                     43:
                     44: #define BLF_N  16                      /* Number of Subkeys */
                     45: #define BLF_MAXKEYLEN ((BLF_N-2)*4)    /* 448 bits */
                     46:
                     47: /* Blowfish context */
                     48: typedef struct BlowfishContext {
                     49:        u_int32_t S[4][256];    /* S-Boxes */
                     50:        u_int32_t P[BLF_N + 2]; /* Subkeys */
                     51: } blf_ctx;
                     52:
                     53: /* Raw access to customized Blowfish
                     54:  *     blf_key is just:
                     55:  *     Blowfish_initstate( state )
                     56:  *     Blowfish_expand0state( state, key, keylen )
                     57:  */
                     58:
1.6     ! millert    59: void Blowfish_encipher(blf_ctx *, u_int32_t *, u_int32_t *);
        !            60: void Blowfish_decipher(blf_ctx *, u_int32_t *, u_int32_t *);
        !            61: void Blowfish_initstate(blf_ctx *);
        !            62: void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t);
1.3       provos     63: void Blowfish_expandstate
1.6     ! millert    64: (blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t);
1.1       provos     65:
                     66: /* Standard Blowfish */
                     67:
1.6     ! millert    68: void blf_key(blf_ctx *, const u_int8_t *, u_int16_t);
        !            69: void blf_enc(blf_ctx *, u_int32_t *, u_int16_t);
        !            70: void blf_dec(blf_ctx *, u_int32_t *, u_int16_t);
1.4       provos     71:
1.6     ! millert    72: void blf_ecb_encrypt(blf_ctx *, u_int8_t *, u_int32_t);
        !            73: void blf_ecb_decrypt(blf_ctx *, u_int8_t *, u_int32_t);
1.4       provos     74:
1.6     ! millert    75: void blf_cbc_encrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
        !            76: void blf_cbc_decrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
1.1       provos     77:
                     78: /* Converts u_int8_t to u_int32_t */
1.6     ! millert    79: u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t , u_int16_t *);
1.1       provos     80:
                     81: #endif