1 /* $NetBSD: bf_enc.c,v 1.11 2024/02/05 21:46:06 andvar Exp $ */ 2 3 /* crypto/bf/bf_enc.c */ 4 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 5 * All rights reserved. 6 * 7 * This package is an SSL implementation written 8 * by Eric Young (eay (at) cryptsoft.com). 9 * The implementation was written so as to conform with Netscapes SSL. 10 * 11 * This library is free for commercial and non-commercial use as long as 12 * the following conditions are aheared to. The following conditions 13 * apply to all code found in this distribution, be it the RC4, RSA, 14 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 15 * included with this distribution is covered by the same copyright terms 16 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 17 * 18 * Copyright remains Eric Young's, and as such any Copyright notices in 19 * the code are not to be removed. 20 * If this package is used in a product, Eric Young should be given attribution 21 * as the author of the parts of the library used. 22 * This can be in the form of a textual message at program startup or 23 * in documentation (online or textual) provided with the package. 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. All advertising materials mentioning features or use of this software 34 * must display the following acknowledgement: 35 * "This product includes cryptographic software written by 36 * Eric Young (eay (at) cryptsoft.com)" 37 * The word 'cryptographic' can be left out if the rouines from the library 38 * being used are not cryptographic related :-). 39 * 4. If you include any Windows specific code (or a derivative thereof) from 40 * the apps directory (application code) you must include an acknowledgement: 41 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 42 * 43 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 46 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 53 * SUCH DAMAGE. 54 * 55 * The licence and distribution terms for any publically available version or 56 * derivative of this code cannot be changed. i.e. this code cannot simply be 57 * copied and put under another distribution licence 58 * [including the GNU Public Licence.] 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: bf_enc.c,v 1.11 2024/02/05 21:46:06 andvar Exp $"); 63 64 #include <sys/types.h> 65 #include <crypto/blowfish/blowfish.h> 66 #include <crypto/blowfish/bf_locl.h> 67 68 /* Blowfish as implemented from 'Blowfish: Springer-Verlag paper' 69 * (From LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, 70 * CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993) 71 */ 72 73 #if (BF_ROUNDS != 16) && (BF_ROUNDS != 20) 74 If you set BF_ROUNDS to some value other than 16 or 20, you will have 75 to modify the code. 76 #endif 77 78 /* XXX "data" is host endian */ 79 void 80 BF_encrypt(BF_LONG *data, const BF_KEY *key) 81 { 82 BF_LONG l, r; 83 const BF_LONG *p, *s; 84 85 p = key->P; 86 s= &key->S[0]; 87 l = data[0]; 88 r = data[1]; 89 90 l^=p[0]; 91 BF_ENC(r, l, s, p[ 1]); 92 BF_ENC(l, r, s, p[ 2]); 93 BF_ENC(r, l, s, p[ 3]); 94 BF_ENC(l, r, s, p[ 4]); 95 BF_ENC(r, l, s, p[ 5]); 96 BF_ENC(l, r, s, p[ 6]); 97 BF_ENC(r, l, s, p[ 7]); 98 BF_ENC(l, r, s, p[ 8]); 99 BF_ENC(r, l, s, p[ 9]); 100 BF_ENC(l, r, s, p[10]); 101 BF_ENC(r, l, s, p[11]); 102 BF_ENC(l, r, s, p[12]); 103 BF_ENC(r, l, s, p[13]); 104 BF_ENC(l, r, s, p[14]); 105 BF_ENC(r, l, s, p[15]); 106 BF_ENC(l, r, s, p[16]); 107 #if BF_ROUNDS == 20 108 BF_ENC(r, l, s, p[17]); 109 BF_ENC(l, r, s, p[18]); 110 BF_ENC(r, l, s, p[19]); 111 BF_ENC(l, r, s, p[20]); 112 #endif 113 r ^= p[BF_ROUNDS + 1]; 114 115 data[1] = l & 0xffffffff; 116 data[0] = r & 0xffffffff; 117 } 118 119 /* XXX "data" is host endian */ 120 void 121 BF_decrypt(BF_LONG *data, const BF_KEY *key) 122 { 123 BF_LONG l, r; 124 const BF_LONG *p, *s; 125 126 p = key->P; 127 s= &key->S[0]; 128 l = data[0]; 129 r = data[1]; 130 131 l ^= p[BF_ROUNDS + 1]; 132 #if BF_ROUNDS == 20 133 BF_ENC(r, l, s, p[20]); 134 BF_ENC(l, r, s, p[19]); 135 BF_ENC(r, l, s, p[18]); 136 BF_ENC(l, r, s, p[17]); 137 #endif 138 BF_ENC(r, l, s, p[16]); 139 BF_ENC(l, r, s, p[15]); 140 BF_ENC(r, l, s, p[14]); 141 BF_ENC(l, r, s, p[13]); 142 BF_ENC(r, l, s, p[12]); 143 BF_ENC(l, r, s, p[11]); 144 BF_ENC(r, l, s, p[10]); 145 BF_ENC(l, r, s, p[ 9]); 146 BF_ENC(r, l, s, p[ 8]); 147 BF_ENC(l, r, s, p[ 7]); 148 BF_ENC(r, l, s, p[ 6]); 149 BF_ENC(l, r, s, p[ 5]); 150 BF_ENC(r, l, s, p[ 4]); 151 BF_ENC(l, r, s, p[ 3]); 152 BF_ENC(r, l, s, p[ 2]); 153 BF_ENC(l, r, s, p[ 1]); 154 r ^= p[0]; 155 156 data[1] = l & 0xffffffff; 157 data[0] = r & 0xffffffff; 158 } 159
Indexes created Sun Oct 25 00:26:45 UTC 2026