bf_enc.c revision 116174
191671Sume/* $KAME: bf_enc.c,v 1.7 2002/02/27 01:33:59 itojun Exp $ */ 262587Sitojun 355009Sshin/* crypto/bf/bf_enc.c */ 4116174Sobrien 591671Sume/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 655009Sshin * All rights reserved. 755009Sshin * 855009Sshin * This package is an SSL implementation written 991671Sume * by Eric Young (eay@cryptsoft.com). 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 1791671Sume * except that the holder is Tim Hudson (tjh@cryptsoft.com). 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 3791671Sume * Eric Young (eay@cryptsoft.com)" 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: 4291671Sume * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 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 62116174Sobrien#include <sys/cdefs.h> 63116174Sobrien__FBSDID("$FreeBSD: head/sys/crypto/blowfish/bf_enc.c 116174 2003-06-10 21:44:29Z obrien $"); 64116174Sobrien 6578064Sume#include <sys/types.h> 6655009Sshin#include <crypto/blowfish/blowfish.h> 6755009Sshin#include <crypto/blowfish/bf_locl.h> 6855009Sshin 6955009Sshin/* Blowfish as implemented from 'Blowfish: Springer-Verlag paper' 7055009Sshin * (From LECTURE NOTES IN COIMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, 7155009Sshin * CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993) 7255009Sshin */ 7355009Sshin 7455009Sshin#if (BF_ROUNDS != 16) && (BF_ROUNDS != 20) 7555009SshinIf you set BF_ROUNDS to some value other than 16 or 20, you will have 7655009Sshinto modify the code. 7755009Sshin#endif 7855009Sshin 7978064Sume/* XXX "data" is host endian */ 8078064Sumevoid 8191671SumeBF_encrypt(data, key) 8278064Sume BF_LONG *data; 8378064Sume BF_KEY *key; 8478064Sume{ 8578064Sume register BF_LONG l, r, *p, *s; 8655009Sshin 8778064Sume p = key->P; 8878064Sume s= &key->S[0]; 8978064Sume l = data[0]; 9078064Sume r = data[1]; 9155009Sshin 9291671Sume l^=p[0]; 9391671Sume BF_ENC(r, l, s, p[ 1]); 9491671Sume BF_ENC(l, r, s, p[ 2]); 9591671Sume BF_ENC(r, l, s, p[ 3]); 9691671Sume BF_ENC(l, r, s, p[ 4]); 9791671Sume BF_ENC(r, l, s, p[ 5]); 9891671Sume BF_ENC(l, r, s, p[ 6]); 9991671Sume BF_ENC(r, l, s, p[ 7]); 10091671Sume BF_ENC(l, r, s, p[ 8]); 10191671Sume BF_ENC(r, l, s, p[ 9]); 10291671Sume BF_ENC(l, r, s, p[10]); 10391671Sume BF_ENC(r, l, s, p[11]); 10491671Sume BF_ENC(l, r, s, p[12]); 10591671Sume BF_ENC(r, l, s, p[13]); 10691671Sume BF_ENC(l, r, s, p[14]); 10791671Sume BF_ENC(r, l, s, p[15]); 10891671Sume BF_ENC(l, r, s, p[16]); 10955009Sshin#if BF_ROUNDS == 20 11091671Sume BF_ENC(r, l, s, p[17]); 11191671Sume BF_ENC(l, r, s, p[18]); 11291671Sume BF_ENC(r, l, s, p[19]); 11391671Sume BF_ENC(l, r, s, p[20]); 11455009Sshin#endif 11591671Sume r ^= p[BF_ROUNDS + 1]; 11691671Sume 11791671Sume data[1] = l & 0xffffffff; 11891671Sume data[0] = r & 0xffffffff; 11991671Sume} 12091671Sume 12191671Sume/* XXX "data" is host endian */ 12291671Sumevoid 12391671SumeBF_decrypt(data, key) 12491671Sume BF_LONG *data; 12591671Sume BF_KEY *key; 12691671Sume{ 12791671Sume register BF_LONG l, r, *p, *s; 12891671Sume 12991671Sume p = key->P; 13091671Sume s= &key->S[0]; 13191671Sume l = data[0]; 13291671Sume r = data[1]; 13391671Sume 13491671Sume l ^= p[BF_ROUNDS + 1]; 13555009Sshin#if BF_ROUNDS == 20 13691671Sume BF_ENC(r, l, s, p[20]); 13791671Sume BF_ENC(l, r, s, p[19]); 13891671Sume BF_ENC(r, l, s, p[18]); 13991671Sume BF_ENC(l, r, s, p[17]); 14055009Sshin#endif 14191671Sume BF_ENC(r, l, s, p[16]); 14291671Sume BF_ENC(l, r, s, p[15]); 14391671Sume BF_ENC(r, l, s, p[14]); 14491671Sume BF_ENC(l, r, s, p[13]); 14591671Sume BF_ENC(r, l, s, p[12]); 14691671Sume BF_ENC(l, r, s, p[11]); 14791671Sume BF_ENC(r, l, s, p[10]); 14891671Sume BF_ENC(l, r, s, p[ 9]); 14991671Sume BF_ENC(r, l, s, p[ 8]); 15091671Sume BF_ENC(l, r, s, p[ 7]); 15191671Sume BF_ENC(r, l, s, p[ 6]); 15291671Sume BF_ENC(l, r, s, p[ 5]); 15391671Sume BF_ENC(r, l, s, p[ 4]); 15491671Sume BF_ENC(l, r, s, p[ 3]); 15591671Sume BF_ENC(r, l, s, p[ 2]); 15691671Sume BF_ENC(l, r, s, p[ 1]); 15791671Sume r ^= p[0]; 15891671Sume 15978064Sume data[1] = l & 0xffffffff; 16078064Sume data[0] = r & 0xffffffff; 16178064Sume} 162