1/* $FreeBSD: src/sys/crypto/blowfish/bf_skey.c,v 1.1.2.3 2002/03/26 10:12:23 ume Exp $ */ 2/* $KAME: bf_skey.c,v 1.7 2002/02/27 01:33:59 itojun Exp $ */ 3 4/* crypto/bf/bf_skey.c */ 5/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) 6 * All rights reserved. 7 * 8 * This package is an SSL implementation written 9 * by Eric Young (eay@mincom.oz.au). 10 * The implementation was written so as to conform with Netscapes SSL. 11 * 12 * This library is free for commercial and non-commercial use as long as 13 * the following conditions are aheared to. The following conditions 14 * apply to all code found in this distribution, be it the RC4, RSA, 15 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 16 * included with this distribution is covered by the same copyright terms 17 * except that the holder is Tim Hudson (tjh@mincom.oz.au). 18 * 19 * Copyright remains Eric Young's, and as such any Copyright notices in 20 * the code are not to be removed. 21 * If this package is used in a product, Eric Young should be given attribution 22 * as the author of the parts of the library used. 23 * This can be in the form of a textual message at program startup or 24 * in documentation (online or textual) provided with the package. 25 * 26 * Redistribution and use in source and binary forms, with or without 27 * modification, are permitted provided that the following conditions 28 * are met: 29 * 1. Redistributions of source code must retain the copyright 30 * notice, this list of conditions and the following disclaimer. 31 * 2. Redistributions in binary form must reproduce the above copyright 32 * notice, this list of conditions and the following disclaimer in the 33 * documentation and/or other materials provided with the distribution. 34 * 3. All advertising materials mentioning features or use of this software 35 * must display the following acknowledgement: 36 * "This product includes cryptographic software written by 37 * Eric Young (eay@mincom.oz.au)" 38 * The word 'cryptographic' can be left out if the rouines from the library 39 * being used are not cryptographic related :-). 40 * 4. If you include any Windows specific code (or a derivative thereof) from 41 * the apps directory (application code) you must include an acknowledgement: 42 * "This product includes software written by Tim Hudson (tjh@mincom.oz.au)" 43 * 44 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 * 56 * The licence and distribution terms for any publically available version or 57 * derivative of this code cannot be changed. i.e. this code cannot simply be 58 * copied and put under another distribution licence 59 * [including the GNU Public Licence.] 60 */ 61 62#include <sys/types.h> 63#include <sys/time.h> 64#include <sys/systm.h> 65#include <crypto/blowfish/blowfish.h> 66#include <crypto/blowfish/bf_locl.h> 67#include <crypto/blowfish/bf_pi.h> 68 69void 70BF_set_key(key, len, data) 71 BF_KEY *key; 72 int len; 73 unsigned char *data; 74{ 75 int i; 76 BF_LONG *p, ri, in[2]; 77 unsigned char *d, *end; 78 79 memcpy((char *)key, (const char *)&bf_init, sizeof(BF_KEY)); 80 p = key->P; 81 82 if (len > ((BF_ROUNDS + 2) * 4)) 83 len = (BF_ROUNDS + 2) * 4; 84 85 d = data; 86 end= &(data[len]); 87 for (i = 0; i < BF_ROUNDS + 2; i++) { 88 ri = *(d++); 89 if (d >= end) d = data; 90 91 ri <<= 8; 92 ri |= *(d++); 93 if (d >= end) d = data; 94 95 ri <<= 8; 96 ri |= *(d++); 97 if (d >= end) d = data; 98 99 ri <<= 8; 100 ri |= *(d++); 101 if (d >= end) d = data; 102 103 p[i] ^= ri; 104 } 105 106 in[0] = 0L; 107 in[1] = 0L; 108 for (i = 0; i < BF_ROUNDS + 2; i += 2) { 109 BF_encrypt(in, key); 110 p[i ] = in[0]; 111 p[i+1] = in[1]; 112 } 113 114 p = key->S; 115 for (i = 0; i < 4 * 256; i += 2) { 116 BF_encrypt(in, key); 117 p[i ] = in[0]; 118 p[i+1] = in[1]; 119 } 120} 121