1 /* $NetBSD: blf.h,v 1.2 2018/04/06 18:58:59 christos Exp $ */ 2 /* $OpenBSD: blf.h,v 1.7 2007/03/14 17:59:41 grunk Exp $ */ 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 #include "includes.h" 39 40 #if !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) 41 42 /* Schneier specifies a maximum key length of 56 bytes. 43 * This ensures that every key bit affects every cipher 44 * bit. However, the subkeys can hold up to 72 bytes. 45 * Warning: For normal blowfish encryption only 56 bytes 46 * of the key affect all cipherbits. 47 */ 48 49 #define BLF_N 16 /* Number of Subkeys */ 50 #define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */ 51 #define BLF_MAXUTILIZED ((BLF_N+2)*4) /* 576 bits */ 52 53 /* Blowfish context */ 54 typedef struct BlowfishContext { 55 u_int32_t S[4][256]; /* S-Boxes */ 56 u_int32_t P[BLF_N + 2]; /* Subkeys */ 57 } blf_ctx; 58 59 /* Raw access to customized Blowfish 60 * blf_key is just: 61 * Blowfish_initstate( state ) 62 * Blowfish_expand0state( state, key, keylen ) 63 */ 64 65 void Blowfish_encipher(blf_ctx *, u_int32_t *, u_int32_t *); 66 void Blowfish_decipher(blf_ctx *, u_int32_t *, u_int32_t *); 67 void Blowfish_initstate(blf_ctx *); 68 void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t); 69 void Blowfish_expandstate 70 (blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t); 71 72 /* Standard Blowfish */ 73 74 void blf_key(blf_ctx *, const u_int8_t *, u_int16_t); 75 void blf_enc(blf_ctx *, u_int32_t *, u_int16_t); 76 void blf_dec(blf_ctx *, u_int32_t *, u_int16_t); 77 78 void blf_ecb_encrypt(blf_ctx *, u_int8_t *, u_int32_t); 79 void blf_ecb_decrypt(blf_ctx *, u_int8_t *, u_int32_t); 80 81 void blf_cbc_encrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t); 82 void blf_cbc_decrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t); 83 84 /* Converts u_int8_t to u_int32_t */ 85 u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t , u_int16_t *); 86 87 #endif /* !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) */ 88 #endif /* _BLF_H */ 89 90