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@ -1,83 +1,48 @@ |
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/* $OpenBSD: blf.h,v 1.3 2001/05/15 02:40:35 deraadt Exp $ */ |
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/* $PostgreSQL: pgsql/contrib/pgcrypto/blf.h,v 1.6 2007/03/28 22:48:58 neilc Exp $ */ |
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/*
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* Blowfish - a fast block cipher designed by Bruce Schneier |
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* PuTTY is copyright 1997-2007 Simon Tatham. |
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* |
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* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de> |
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* All rights reserved. |
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* Portions copyright Robert de Bath, Joris van Rantwijk, Delian |
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* Delchev, Andreas Schultz, Jeroen Massar, Wez Furlong, Nicolas Barry, |
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* Justin Bradford, Ben Harris, Malcolm Smith, Ahmad Khalifa, Markus |
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* Kuhn, and CORE SDI S.A. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by Niels Provos. |
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* 4. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* Permission is hereby granted, free of charge, to any person |
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* obtaining a copy of this software and associated documentation files |
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* (the "Software"), to deal in the Software without restriction, |
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* including without limitation the rights to use, copy, modify, merge, |
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* publish, distribute, sublicense, and/or sell copies of the Software, |
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* and to permit persons to whom the Software is furnished to do so, |
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* subject to the following conditions: |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef _BLF_H_ |
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#define _BLF_H_ |
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/* Schneier states the maximum key length to be 56 bytes.
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* The way how the subkeys are initalized by the key up |
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* to (N+2)*4 i.e. 72 bytes are utilized. |
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* Warning: For normal blowfish encryption only 56 bytes |
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* of the key affect all cipherbits. |
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* The above copyright notice and this permission notice shall be |
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* included in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE |
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* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF |
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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*/ |
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#define BLF_N 16 /* Number of Subkeys */ |
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#define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */ |
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/* Blowfish context */ |
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typedef struct BlowfishContext |
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typedef struct |
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{ |
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uint32 S[4][256]; /* S-Boxes */ |
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uint32 P[BLF_N + 2]; /* Subkeys */ |
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} blf_ctx; |
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/* Raw access to customized Blowfish
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* blf_key is just: |
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* Blowfish_initstate( state ) |
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* Blowfish_expand0state( state, key, keylen ) |
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*/ |
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void Blowfish_encipher(blf_ctx *, uint32 *); |
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void Blowfish_decipher(blf_ctx *, uint32 *); |
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void Blowfish_initstate(blf_ctx *); |
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void Blowfish_expand0state(blf_ctx *, const uint8 *, uint16); |
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void Blowfish_expandstate |
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(blf_ctx *, const uint8 *, uint16, const uint8 *, uint16); |
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/* Standard Blowfish */ |
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void blf_key(blf_ctx *, const uint8 *, uint16); |
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void blf_enc(blf_ctx *, uint32 *, uint16); |
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void blf_dec(blf_ctx *, uint32 *, uint16); |
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/* Converts uint8 to uint32 */ |
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uint32 Blowfish_stream2word(const uint8 *, uint16, uint16 *); |
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void blf_ecb_encrypt(blf_ctx *, uint8 *, uint32); |
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void blf_ecb_decrypt(blf_ctx *, uint8 *, uint32); |
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uint32 S0[256], |
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S1[256], |
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S2[256], |
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S3[256], |
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P[18]; |
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uint32 iv0, |
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iv1; /* for CBC mode */ |
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} BlowfishContext; |
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void blowfish_setkey(BlowfishContext *ctx, const uint8 *key, short keybytes); |
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void blowfish_setiv(BlowfishContext *ctx, const uint8 *iv); |
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void blowfish_encrypt_cbc(uint8 *blk, int len, BlowfishContext *ctx); |
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void blowfish_decrypt_cbc(uint8 *blk, int len, BlowfishContext *ctx); |
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void blowfish_encrypt_ecb(uint8 *blk, int len, BlowfishContext *ctx); |
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void blowfish_decrypt_ecb(uint8 *blk, int len, BlowfishContext *ctx); |
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void blf_cbc_encrypt(blf_ctx *, uint8 *, uint8 *, uint32); |
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void blf_cbc_decrypt(blf_ctx *, uint8 *, uint8 *, uint32); |
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#endif |
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Neil Conway
19 years ago