1 /* $FreeBSD: src/sys/crypto/blowfish/bf_skey.c,v 1.6 2003/06/10 21:38:38 obrien 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 6 /* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) 7 * All rights reserved. 8 * 9 * This package is an SSL implementation written 10 * by Eric Young (eay@mincom.oz.au). 11 * The implementation was written so as to conform with Netscapes SSL. 12 * 13 * This library is free for commercial and non-commercial use as long as 14 * the following conditions are aheared to. The following conditions 15 * apply to all code found in this distribution, be it the RC4, RSA, 16 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 17 * included with this distribution is covered by the same copyright terms 18 * except that the holder is Tim Hudson (tjh@mincom.oz.au). 19 * 20 * Copyright remains Eric Young's, and as such any Copyright notices in 21 * the code are not to be removed. 22 * If this package is used in a product, Eric Young should be given attribution 23 * as the author of the parts of the library used. 24 * This can be in the form of a textual message at program startup or 25 * in documentation (online or textual) provided with the package. 26 * 27 * Redistribution and use in source and binary forms, with or without 28 * modification, are permitted provided that the following conditions 29 * are met: 30 * 1. Redistributions of source code must retain the copyright 31 * notice, this list of conditions and the following disclaimer. 32 * 2. Redistributions in binary form must reproduce the above copyright 33 * notice, this list of conditions and the following disclaimer in the 34 * documentation and/or other materials provided with the distribution. 35 * 3. All advertising materials mentioning features or use of this software 36 * must display the following acknowledgement: 37 * "This product includes cryptographic software written by 38 * Eric Young (eay@mincom.oz.au)" 39 * The word 'cryptographic' can be left out if the rouines from the library 40 * being used are not cryptographic related :-). 41 * 4. If you include any Windows specific code (or a derivative thereof) from 42 * the apps directory (application code) you must include an acknowledgement: 43 * "This product includes software written by Tim Hudson (tjh@mincom.oz.au)" 44 * 45 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 * 57 * The licence and distribution terms for any publically available version or 58 * derivative of this code cannot be changed. i.e. this code cannot simply be 59 * copied and put under another distribution licence 60 * [including the GNU Public Licence.] 61 */ 62 63 #include <sys/types.h> 64 #include <sys/time.h> 65 #include <sys/systm.h> 66 #include <crypto/blowfish/blowfish.h> 67 #include <crypto/blowfish/bf_locl.h> 68 #include <crypto/blowfish/bf_pi.h> 69 70 void 71 BF_set_key(BF_KEY *key, int len, unsigned char *data) 72 { 73 int i; 74 BF_LONG *p, ri, in[2]; 75 unsigned char *d, *end; 76 77 memcpy((char *)key, (const char *)&bf_init, sizeof(BF_KEY)); 78 p = key->P; 79 80 if (len > ((BF_ROUNDS + 2) * 4)) 81 len = (BF_ROUNDS + 2) * 4; 82 83 d = data; 84 end= &(data[len]); 85 for (i = 0; i < BF_ROUNDS + 2; i++) { 86 ri = *(d++); 87 if (d >= end) d = data; 88 89 ri <<= 8; 90 ri |= *(d++); 91 if (d >= end) d = data; 92 93 ri <<= 8; 94 ri |= *(d++); 95 if (d >= end) d = data; 96 97 ri <<= 8; 98 ri |= *(d++); 99 if (d >= end) d = data; 100 101 p[i] ^= ri; 102 } 103 104 in[0] = 0L; 105 in[1] = 0L; 106 for (i = 0; i < BF_ROUNDS + 2; i += 2) { 107 BF_encrypt(in, key); 108 p[i ] = in[0]; 109 p[i+1] = in[1]; 110 } 111 112 p = key->S; 113 for (i = 0; i < 4 * 256; i += 2) { 114 BF_encrypt(in, key); 115 p[i ] = in[0]; 116 p[i+1] = in[1]; 117 } 118 } 119