1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* $OpenBSD: blf.h,v 1.6 2002/02/16 21:27:17 millert Exp $ */ 23 /* 24 * Blowfish - a fast block cipher designed by Bruce Schneier 25 * 26 * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de> 27 * All rights reserved. 28 * 29 * Redistribution and use in source and binary forms, with or without 30 * modification, are permitted provided that the following conditions 31 * are met: 32 * 1. Redistributions of source code must retain the above copyright 33 * notice, this list of conditions and the following disclaimer. 34 * 2. Redistributions in binary form must reproduce the above copyright 35 * notice, this list of conditions and the following disclaimer in the 36 * documentation and/or other materials provided with the distribution. 37 * 3. All advertising materials mentioning features or use of this software 38 * must display the following acknowledgement: 39 * This product includes software developed by Niels Provos. 40 * 4. The name of the author may not be used to endorse or promote products 41 * derived from this software without specific prior written permission. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 44 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 45 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 46 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 47 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 48 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 49 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 50 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 51 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 52 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 53 */ 54 55 #ifndef _BLF_H_ 56 #define _BLF_H_ 57 58 /* Schneier specifies a maximum key length of 56 bytes. 59 * This ensures that every key bit affects every cipher 60 * bit. However, the subkeys can hold up to 72 bytes. 61 * Warning: For normal blowfish encryption only 56 bytes 62 * of the key affect all cipherbits. 63 */ 64 65 #define BLF_N 16 /* Number of Subkeys */ 66 #define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */ 67 68 /* Blowfish context */ 69 typedef struct BlowfishContext { 70 uint32_t S[4][256]; /* S-Boxes */ 71 uint32_t P[BLF_N + 2]; /* Subkeys */ 72 } blf_ctx; 73 74 /* Raw access to customized Blowfish 75 * blf_key is just: 76 * Blowfish_initstate( state ) 77 * Blowfish_expand0state( state, key, keylen ) 78 */ 79 80 void Blowfish_encipher(blf_ctx *, uint32_t *, uint32_t *); 81 void Blowfish_decipher(blf_ctx *, uint32_t *, uint32_t *); 82 void Blowfish_initstate(blf_ctx *); 83 void Blowfish_expand0state(blf_ctx *, const uint8_t *, uint16_t); 84 void Blowfish_expandstate 85 (blf_ctx *, const uint8_t *, uint16_t, const uint8_t *, uint16_t); 86 87 /* Standard Blowfish */ 88 89 void blf_key(blf_ctx *, const uint8_t *, uint16_t); 90 void blf_enc(blf_ctx *, uint32_t *, uint16_t); 91 void blf_dec(blf_ctx *, uint32_t *, uint16_t); 92 93 void blf_ecb_encrypt(blf_ctx *, uint8_t *, uint32_t); 94 void blf_ecb_decrypt(blf_ctx *, uint8_t *, uint32_t); 95 96 void blf_cbc_encrypt(blf_ctx *, uint8_t *, uint8_t *, uint32_t); 97 void blf_cbc_decrypt(blf_ctx *, uint8_t *, uint8_t *, uint32_t); 98 99 /* Converts uint8_t to uint32_t */ 100 uint32_t Blowfish_stream2word(const uint8_t *, uint16_t , uint16_t *); 101 102 #endif 103