bf_enc.c revision 62587
162587Sitojun/* $FreeBSD: head/sys/crypto/blowfish/bf_enc.c 62587 2000-07-04 16:35:15Z itojun $ */ 262587Sitojun/* $KAME: bf_enc.c,v 1.3 2000/03/27 04:36:26 sumikawa Exp $ */ 362587Sitojun 455009Sshin/* crypto/bf/bf_enc.c */ 555009Sshin/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) 655009Sshin * All rights reserved. 755009Sshin * 855009Sshin * This package is an SSL implementation written 955009Sshin * by Eric Young (eay@mincom.oz.au). 1055009Sshin * The implementation was written so as to conform with Netscapes SSL. 1155009Sshin * 1255009Sshin * This library is free for commercial and non-commercial use as long as 1355009Sshin * the following conditions are aheared to. The following conditions 1455009Sshin * apply to all code found in this distribution, be it the RC4, RSA, 1555009Sshin * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1655009Sshin * included with this distribution is covered by the same copyright terms 1755009Sshin * except that the holder is Tim Hudson (tjh@mincom.oz.au). 1855009Sshin * 1955009Sshin * Copyright remains Eric Young's, and as such any Copyright notices in 2055009Sshin * the code are not to be removed. 2155009Sshin * If this package is used in a product, Eric Young should be given attribution 2255009Sshin * as the author of the parts of the library used. 2355009Sshin * This can be in the form of a textual message at program startup or 2455009Sshin * in documentation (online or textual) provided with the package. 2555009Sshin * 2655009Sshin * Redistribution and use in source and binary forms, with or without 2755009Sshin * modification, are permitted provided that the following conditions 2855009Sshin * are met: 2955009Sshin * 1. Redistributions of source code must retain the copyright 3055009Sshin * notice, this list of conditions and the following disclaimer. 3155009Sshin * 2. Redistributions in binary form must reproduce the above copyright 3255009Sshin * notice, this list of conditions and the following disclaimer in the 3355009Sshin * documentation and/or other materials provided with the distribution. 3455009Sshin * 3. All advertising materials mentioning features or use of this software 3555009Sshin * must display the following acknowledgement: 3655009Sshin * "This product includes cryptographic software written by 3755009Sshin * Eric Young (eay@mincom.oz.au)" 3855009Sshin * The word 'cryptographic' can be left out if the rouines from the library 3955009Sshin * being used are not cryptographic related :-). 4055009Sshin * 4. If you include any Windows specific code (or a derivative thereof) from 4155009Sshin * the apps directory (application code) you must include an acknowledgement: 4255009Sshin * "This product includes software written by Tim Hudson (tjh@mincom.oz.au)" 4355009Sshin * 4455009Sshin * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4555009Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4655009Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4755009Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4855009Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4955009Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5055009Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5155009Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5255009Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5355009Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5455009Sshin * SUCH DAMAGE. 5555009Sshin * 5655009Sshin * The licence and distribution terms for any publically available version or 5755009Sshin * derivative of this code cannot be changed. i.e. this code cannot simply be 5855009Sshin * copied and put under another distribution licence 5955009Sshin * [including the GNU Public Licence.] 6055009Sshin */ 6155009Sshin 6255009Sshin#include <crypto/blowfish/blowfish.h> 6355009Sshin#include <crypto/blowfish/bf_locl.h> 6455009Sshin 6555009Sshin/* Blowfish as implemented from 'Blowfish: Springer-Verlag paper' 6655009Sshin * (From LECTURE NOTES IN COIMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, 6755009Sshin * CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993) 6855009Sshin */ 6955009Sshin 7055009Sshin#if (BF_ROUNDS != 16) && (BF_ROUNDS != 20) 7155009SshinIf you set BF_ROUNDS to some value other than 16 or 20, you will have 7255009Sshinto modify the code. 7355009Sshin#endif 7455009Sshin 7555009Sshinvoid BF_encrypt(data,key,encrypt) 7655009SshinBF_LONG *data; 7755009SshinBF_KEY *key; 7855009Sshinint encrypt; 7955009Sshin { 8055009Sshin register BF_LONG l,r,*p,*s; 8155009Sshin 8255009Sshin p=key->P; 8355009Sshin s= &(key->S[0]); 8455009Sshin l=data[0]; 8555009Sshin r=data[1]; 8655009Sshin 8755009Sshin if (encrypt) 8855009Sshin { 8955009Sshin l^=p[0]; 9055009Sshin BF_ENC(r,l,s,p[ 1]); 9155009Sshin BF_ENC(l,r,s,p[ 2]); 9255009Sshin BF_ENC(r,l,s,p[ 3]); 9355009Sshin BF_ENC(l,r,s,p[ 4]); 9455009Sshin BF_ENC(r,l,s,p[ 5]); 9555009Sshin BF_ENC(l,r,s,p[ 6]); 9655009Sshin BF_ENC(r,l,s,p[ 7]); 9755009Sshin BF_ENC(l,r,s,p[ 8]); 9855009Sshin BF_ENC(r,l,s,p[ 9]); 9955009Sshin BF_ENC(l,r,s,p[10]); 10055009Sshin BF_ENC(r,l,s,p[11]); 10155009Sshin BF_ENC(l,r,s,p[12]); 10255009Sshin BF_ENC(r,l,s,p[13]); 10355009Sshin BF_ENC(l,r,s,p[14]); 10455009Sshin BF_ENC(r,l,s,p[15]); 10555009Sshin BF_ENC(l,r,s,p[16]); 10655009Sshin#if BF_ROUNDS == 20 10755009Sshin BF_ENC(r,l,s,p[17]); 10855009Sshin BF_ENC(l,r,s,p[18]); 10955009Sshin BF_ENC(r,l,s,p[19]); 11055009Sshin BF_ENC(l,r,s,p[20]); 11155009Sshin#endif 11255009Sshin r^=p[BF_ROUNDS+1]; 11355009Sshin } 11455009Sshin else 11555009Sshin { 11655009Sshin l^=p[BF_ROUNDS+1]; 11755009Sshin#if BF_ROUNDS == 20 11855009Sshin BF_ENC(r,l,s,p[20]); 11955009Sshin BF_ENC(l,r,s,p[19]); 12055009Sshin BF_ENC(r,l,s,p[18]); 12155009Sshin BF_ENC(l,r,s,p[17]); 12255009Sshin#endif 12355009Sshin BF_ENC(r,l,s,p[16]); 12455009Sshin BF_ENC(l,r,s,p[15]); 12555009Sshin BF_ENC(r,l,s,p[14]); 12655009Sshin BF_ENC(l,r,s,p[13]); 12755009Sshin BF_ENC(r,l,s,p[12]); 12855009Sshin BF_ENC(l,r,s,p[11]); 12955009Sshin BF_ENC(r,l,s,p[10]); 13055009Sshin BF_ENC(l,r,s,p[ 9]); 13155009Sshin BF_ENC(r,l,s,p[ 8]); 13255009Sshin BF_ENC(l,r,s,p[ 7]); 13355009Sshin BF_ENC(r,l,s,p[ 6]); 13455009Sshin BF_ENC(l,r,s,p[ 5]); 13555009Sshin BF_ENC(r,l,s,p[ 4]); 13655009Sshin BF_ENC(l,r,s,p[ 3]); 13755009Sshin BF_ENC(r,l,s,p[ 2]); 13855009Sshin BF_ENC(l,r,s,p[ 1]); 13955009Sshin r^=p[0]; 14055009Sshin } 14155009Sshin data[1]=l&0xffffffff; 14255009Sshin data[0]=r&0xffffffff; 14355009Sshin } 144