/* $OpenBSD: blf.h,v 1.7 2007/03/14 17:59:41 grunk Exp $ */ /* * Blowfish - a fast block cipher designed by Bruce Schneier * * Copyright 1997 Niels Provos * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Niels Provos. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _BLF_H_ #define _BLF_H_ #if !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) /* Schneier specifies a maximum key length of 56 bytes. * This ensures that every key bit affects every cipher * bit. However, the subkeys can hold up to 72 bytes. * Warning: For normal blowfish encryption only 56 bytes * of the key affect all cipherbits. */ #define BLF_N 16 /* Number of Subkeys */ #define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */ #define BLF_MAXUTILIZED ((BLF_N + 2)*4) /* 576 bits */ /* Blowfish context */ typedef struct BlowfishContext { uint32_t S[4][256]; /* S-Boxes */ uint32_t P[BLF_N + 2]; /* Subkeys */ } blf_ctx; /* Raw access to customized Blowfish * blf_key is just: * Blowfish_initstate( state ) * Blowfish_expand0state( state, key, keylen ) */ void Blowfish_encipher(blf_ctx *, uint32_t *, uint32_t *); void Blowfish_decipher(blf_ctx *, uint32_t *, uint32_t *); void Blowfish_initstate(blf_ctx *); void Blowfish_expand0state(blf_ctx *, const uint8_t *, uint16_t); void Blowfish_expandstate (blf_ctx *, const uint8_t *, uint16_t, const uint8_t *, uint16_t); /* Standard Blowfish */ void blf_key(blf_ctx *, const uint8_t *, uint16_t); void blf_enc(blf_ctx *, uint32_t *, uint16_t); void blf_dec(blf_ctx *, uint32_t *, uint16_t); void blf_ecb_encrypt(blf_ctx *, uint8_t *, uint32_t); void blf_ecb_decrypt(blf_ctx *, uint8_t *, uint32_t); void blf_cbc_encrypt(blf_ctx *, uint8_t *, uint8_t *, uint32_t); void blf_cbc_decrypt(blf_ctx *, uint8_t *, uint8_t *, uint32_t); /* Converts uint8_t to uint32_t */ uint32_t Blowfish_stream2word(const uint8_t *, uint16_t, uint16_t *); /* bcrypt with pbkd */ int bcrypt_pbkdf(const char *pass, size_t passlen, const uint8_t *salt, size_t saltlen, uint8_t *key, size_t keylen, unsigned int rounds); #endif /* !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) */ #endif /* _BLF_H */