bf_skey.c revision 55009
155009Sshin/* crypto/bf/bf_skey.c */ 255009Sshin/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) 355009Sshin * All rights reserved. 455009Sshin * 555009Sshin * This package is an SSL implementation written 655009Sshin * by Eric Young (eay@mincom.oz.au). 755009Sshin * The implementation was written so as to conform with Netscapes SSL. 855009Sshin * 955009Sshin * This library is free for commercial and non-commercial use as long as 1055009Sshin * the following conditions are aheared to. The following conditions 1155009Sshin * apply to all code found in this distribution, be it the RC4, RSA, 1255009Sshin * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355009Sshin * included with this distribution is covered by the same copyright terms 1455009Sshin * except that the holder is Tim Hudson (tjh@mincom.oz.au). 1555009Sshin * 1655009Sshin * Copyright remains Eric Young's, and as such any Copyright notices in 1755009Sshin * the code are not to be removed. 1855009Sshin * If this package is used in a product, Eric Young should be given attribution 1955009Sshin * as the author of the parts of the library used. 2055009Sshin * This can be in the form of a textual message at program startup or 2155009Sshin * in documentation (online or textual) provided with the package. 2255009Sshin * 2355009Sshin * Redistribution and use in source and binary forms, with or without 2455009Sshin * modification, are permitted provided that the following conditions 2555009Sshin * are met: 2655009Sshin * 1. Redistributions of source code must retain the copyright 2755009Sshin * notice, this list of conditions and the following disclaimer. 2855009Sshin * 2. Redistributions in binary form must reproduce the above copyright 2955009Sshin * notice, this list of conditions and the following disclaimer in the 3055009Sshin * documentation and/or other materials provided with the distribution. 3155009Sshin * 3. All advertising materials mentioning features or use of this software 3255009Sshin * must display the following acknowledgement: 3355009Sshin * "This product includes cryptographic software written by 3455009Sshin * Eric Young (eay@mincom.oz.au)" 3555009Sshin * The word 'cryptographic' can be left out if the rouines from the library 3655009Sshin * being used are not cryptographic related :-). 3755009Sshin * 4. If you include any Windows specific code (or a derivative thereof) from 3855009Sshin * the apps directory (application code) you must include an acknowledgement: 3955009Sshin * "This product includes software written by Tim Hudson (tjh@mincom.oz.au)" 4055009Sshin * 4155009Sshin * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255009Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355009Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455009Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555009Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655009Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755009Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855009Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955009Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055009Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155009Sshin * SUCH DAMAGE. 5255009Sshin * 5355009Sshin * The licence and distribution terms for any publically available version or 5455009Sshin * derivative of this code cannot be changed. i.e. this code cannot simply be 5555009Sshin * copied and put under another distribution licence 5655009Sshin * [including the GNU Public Licence.] 5755009Sshin * 5855009Sshin * $FreeBSD: head/sys/crypto/blowfish/bf_skey.c 55009 1999-12-22 19:13:38Z shin $ 5955009Sshin */ 6055009Sshin 6155009Sshin#include <sys/types.h> 6255009Sshin#include <sys/time.h> 6355009Sshin#include <sys/systm.h> 6455009Sshin#include <crypto/blowfish/blowfish.h> 6555009Sshin#include <crypto/blowfish/bf_locl.h> 6655009Sshin#include <crypto/blowfish/bf_pi.h> 6755009Sshin 6855009Sshinvoid BF_set_key(key,len,data) 6955009SshinBF_KEY *key; 7055009Sshinint len; 7155009Sshinunsigned char *data; 7255009Sshin { 7355009Sshin int i; 7455009Sshin BF_LONG *p,ri,in[2]; 7555009Sshin unsigned char *d,*end; 7655009Sshin 7755009Sshin 7855009Sshin memcpy((char *)key,(char *)&bf_init,sizeof(BF_KEY)); 7955009Sshin p=key->P; 8055009Sshin 8155009Sshin if (len > ((BF_ROUNDS+2)*4)) len=(BF_ROUNDS+2)*4; 8255009Sshin 8355009Sshin d=data; 8455009Sshin end= &(data[len]); 8555009Sshin for (i=0; i<(BF_ROUNDS+2); i++) 8655009Sshin { 8755009Sshin ri= *(d++); 8855009Sshin if (d >= end) d=data; 8955009Sshin 9055009Sshin ri<<=8; 9155009Sshin ri|= *(d++); 9255009Sshin if (d >= end) d=data; 9355009Sshin 9455009Sshin ri<<=8; 9555009Sshin ri|= *(d++); 9655009Sshin if (d >= end) d=data; 9755009Sshin 9855009Sshin ri<<=8; 9955009Sshin ri|= *(d++); 10055009Sshin if (d >= end) d=data; 10155009Sshin 10255009Sshin p[i]^=ri; 10355009Sshin } 10455009Sshin 10555009Sshin in[0]=0L; 10655009Sshin in[1]=0L; 10755009Sshin for (i=0; i<(BF_ROUNDS+2); i+=2) 10855009Sshin { 10955009Sshin BF_encrypt(in,key,BF_ENCRYPT); 11055009Sshin p[i ]=in[0]; 11155009Sshin p[i+1]=in[1]; 11255009Sshin } 11355009Sshin 11455009Sshin p=key->S; 11555009Sshin for (i=0; i<4*256; i+=2) 11655009Sshin { 11755009Sshin BF_encrypt(in,key,BF_ENCRYPT); 11855009Sshin p[i ]=in[0]; 11955009Sshin p[i+1]=in[1]; 12055009Sshin } 12155009Sshin } 12255009Sshin 123