bf_skey.c revision 91671
162587Sitojun/* $FreeBSD: head/sys/crypto/blowfish/bf_skey.c 91671 2002-03-05 09:19:02Z ume $ */ 291671Sume/* $KAME: bf_skey.c,v 1.7 2002/02/27 01:33:59 itojun Exp $ */ 362587Sitojun 455009Sshin/* crypto/bf/bf_skey.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 <sys/types.h> 6355009Sshin#include <sys/time.h> 6455009Sshin#include <sys/systm.h> 6555009Sshin#include <crypto/blowfish/blowfish.h> 6655009Sshin#include <crypto/blowfish/bf_locl.h> 6755009Sshin#include <crypto/blowfish/bf_pi.h> 6855009Sshin 6978064Sumevoid 7078064SumeBF_set_key(key, len, data) 7178064Sume BF_KEY *key; 7278064Sume int len; 7378064Sume unsigned char *data; 7478064Sume{ 7555009Sshin int i; 7678064Sume BF_LONG *p, ri, in[2]; 7778064Sume unsigned char *d, *end; 7855009Sshin 7991671Sume memcpy((char *)key, (const char *)&bf_init, sizeof(BF_KEY)); 8078064Sume p = key->P; 8155009Sshin 8278064Sume if (len > ((BF_ROUNDS + 2) * 4)) 8378064Sume len = (BF_ROUNDS + 2) * 4; 8455009Sshin 8578064Sume d = data; 8655009Sshin end= &(data[len]); 8778064Sume for (i = 0; i < BF_ROUNDS + 2; i++) { 8878064Sume ri = *(d++); 8978064Sume if (d >= end) d = data; 9055009Sshin 9178064Sume ri <<= 8; 9278064Sume ri |= *(d++); 9378064Sume if (d >= end) d = data; 9455009Sshin 9578064Sume ri <<= 8; 9678064Sume ri |= *(d++); 9778064Sume if (d >= end) d = data; 9855009Sshin 9978064Sume ri <<= 8; 10078064Sume ri |= *(d++); 10178064Sume if (d >= end) d = data; 10255009Sshin 10378064Sume p[i] ^= ri; 10478064Sume } 10555009Sshin 10678064Sume in[0] = 0L; 10778064Sume in[1] = 0L; 10878064Sume for (i = 0; i < BF_ROUNDS + 2; i += 2) { 10991671Sume BF_encrypt(in, key); 11078064Sume p[i ] = in[0]; 11178064Sume p[i+1] = in[1]; 11278064Sume } 11355009Sshin 11478064Sume p = key->S; 11578064Sume for (i = 0; i < 4 * 256; i += 2) { 11691671Sume BF_encrypt(in, key); 11778064Sume p[i ] = in[0]; 11878064Sume p[i+1] = in[1]; 11955009Sshin } 12078064Sume} 121