bf_skey.c revision 116174
1228753Smm/* $KAME: bf_skey.c,v 1.7 2002/02/27 01:33:59 itojun Exp $ */ 2228753Smm 3228753Smm/* crypto/bf/bf_skey.c */ 4228753Smm 5228753Smm/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) 6228753Smm * All rights reserved. 7228753Smm * 8228753Smm * This package is an SSL implementation written 9228753Smm * by Eric Young (eay@mincom.oz.au). 10228753Smm * The implementation was written so as to conform with Netscapes SSL. 11228753Smm * 12228753Smm * This library is free for commercial and non-commercial use as long as 13228753Smm * the following conditions are aheared to. The following conditions 14228753Smm * apply to all code found in this distribution, be it the RC4, RSA, 15228753Smm * lhash, DES, etc., code; not just the SSL code. The SSL documentation 16228753Smm * included with this distribution is covered by the same copyright terms 17228753Smm * except that the holder is Tim Hudson (tjh@mincom.oz.au). 18228753Smm * 19228753Smm * Copyright remains Eric Young's, and as such any Copyright notices in 20228753Smm * the code are not to be removed. 21228753Smm * If this package is used in a product, Eric Young should be given attribution 22228753Smm * as the author of the parts of the library used. 23228753Smm * This can be in the form of a textual message at program startup or 24228753Smm * in documentation (online or textual) provided with the package. 25228753Smm * 26228763Smm * Redistribution and use in source and binary forms, with or without 27228753Smm * modification, are permitted provided that the following conditions 28228753Smm * are met: 29228753Smm * 1. Redistributions of source code must retain the copyright 30228753Smm * notice, this list of conditions and the following disclaimer. 31228753Smm * 2. Redistributions in binary form must reproduce the above copyright 32228776Smm * notice, this list of conditions and the following disclaimer in the 33228753Smm * documentation and/or other materials provided with the distribution. 34228753Smm * 3. All advertising materials mentioning features or use of this software 35232153Smm * must display the following acknowledgement: 36232153Smm * "This product includes cryptographic software written by 37232153Smm * Eric Young (eay@mincom.oz.au)" 38232153Smm * The word 'cryptographic' can be left out if the rouines from the library 39348608Smm * being used are not cryptographic related :-). 40232153Smm * 4. If you include any Windows specific code (or a derivative thereof) from 41232153Smm * the apps directory (application code) you must include an acknowledgement: 42232153Smm * "This product includes software written by Tim Hudson (tjh@mincom.oz.au)" 43228753Smm * 44232153Smm * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 45228753Smm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46228753Smm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47228753Smm * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 48228753Smm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49228753Smm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50228753Smm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51228753Smm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52228753Smm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53228753Smm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54228753Smm * SUCH DAMAGE. 55228753Smm * 56228753Smm * The licence and distribution terms for any publically available version or 57228753Smm * derivative of this code cannot be changed. i.e. this code cannot simply be 58232153Smm * copied and put under another distribution licence 59232153Smm * [including the GNU Public Licence.] 60228753Smm */ 61232153Smm 62232153Smm#include <sys/cdefs.h> 63228753Smm__FBSDID("$FreeBSD: head/sys/crypto/blowfish/bf_skey.c 116174 2003-06-10 21:44:29Z obrien $"); 64228753Smm 65228753Smm#include <sys/types.h> 66228753Smm#include <sys/time.h> 67228753Smm#include <sys/systm.h> 68228753Smm#include <crypto/blowfish/blowfish.h> 69232153Smm#include <crypto/blowfish/bf_locl.h> 70232153Smm#include <crypto/blowfish/bf_pi.h> 71228753Smm 72228753Smmvoid 73228753SmmBF_set_key(key, len, data) 74228753Smm BF_KEY *key; 75228753Smm int len; 76232153Smm unsigned char *data; 77232153Smm{ 78228753Smm int i; 79228753Smm BF_LONG *p, ri, in[2]; 80228753Smm unsigned char *d, *end; 81228753Smm 82228753Smm memcpy((char *)key, (const char *)&bf_init, sizeof(BF_KEY)); 83228753Smm p = key->P; 84232153Smm 85302001Smm if (len > ((BF_ROUNDS + 2) * 4)) 86232153Smm len = (BF_ROUNDS + 2) * 4; 87302001Smm 88228753Smm d = data; 89228753Smm end= &(data[len]); 90228753Smm for (i = 0; i < BF_ROUNDS + 2; i++) { 91228753Smm ri = *(d++); 92228753Smm if (d >= end) d = data; 93228753Smm 94228753Smm ri <<= 8; 95358090Smm ri |= *(d++); 96358090Smm if (d >= end) d = data; 97228753Smm 98228753Smm ri <<= 8; 99232153Smm ri |= *(d++); 100232153Smm if (d >= end) d = data; 101232153Smm 102232153Smm ri <<= 8; 103232153Smm ri |= *(d++); 104232153Smm if (d >= end) d = data; 105232153Smm 106232153Smm p[i] ^= ri; 107232153Smm } 108232153Smm 109232153Smm in[0] = 0L; 110348608Smm in[1] = 0L; 111232153Smm for (i = 0; i < BF_ROUNDS + 2; i += 2) { 112232153Smm BF_encrypt(in, key); 113232153Smm p[i ] = in[0]; 114232153Smm p[i+1] = in[1]; 115232153Smm } 116232153Smm 117348608Smm p = key->S; 118232153Smm for (i = 0; i < 4 * 256; i += 2) { 119232153Smm BF_encrypt(in, key); 120232153Smm p[i ] = in[0]; 121232153Smm p[i+1] = in[1]; 122232153Smm } 123232153Smm} 124232153Smm