| 1 | /* $NetBSD: bf_skey.c,v 1.6 2005/12/11 12:20:48 christos Exp $ */ |
| 2 | /* $KAME: bf_skey.c,v 1.5 2000/11/06 13:58:08 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/cdefs.h> |
| 63 | __KERNEL_RCSID(0, "$NetBSD: bf_skey.c,v 1.6 2005/12/11 12:20:48 christos Exp $" ); |
| 64 | |
| 65 | #include <sys/types.h> |
| 66 | #include <sys/time.h> |
| 67 | #ifdef _KERNEL |
| 68 | #include <sys/systm.h> |
| 69 | #else |
| 70 | #include <string.h> |
| 71 | #endif |
| 72 | #include <crypto/blowfish/blowfish.h> |
| 73 | #include <crypto/blowfish/bf_locl.h> |
| 74 | #include <crypto/blowfish/bf_pi.h> |
| 75 | |
| 76 | void |
| 77 | BF_set_key(BF_KEY *key, int len, const unsigned char *data) |
| 78 | { |
| 79 | int i; |
| 80 | BF_LONG *p, ri, in[2]; |
| 81 | const unsigned char *d, *end; |
| 82 | |
| 83 | memcpy(key, &bf_init, sizeof(BF_KEY)); |
| 84 | p = key->P; |
| 85 | |
| 86 | if (len > ((BF_ROUNDS + 2) * 4)) |
| 87 | len = (BF_ROUNDS + 2) * 4; |
| 88 | |
| 89 | d = data; |
| 90 | end= &(data[len]); |
| 91 | for (i = 0; i < BF_ROUNDS + 2; i++) { |
| 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 | ri <<= 8; |
| 104 | ri |= *(d++); |
| 105 | if (d >= end) d = data; |
| 106 | |
| 107 | p[i] ^= ri; |
| 108 | } |
| 109 | |
| 110 | in[0] = 0L; |
| 111 | in[1] = 0L; |
| 112 | for (i = 0; i < BF_ROUNDS + 2; i += 2) { |
| 113 | BF_encrypt(in, key); |
| 114 | p[i ] = in[0]; |
| 115 | p[i+1] = in[1]; |
| 116 | } |
| 117 | |
| 118 | p = key->S; |
| 119 | for (i = 0; i < 4 * 256; i += 2) { |
| 120 | BF_encrypt(in, key); |
| 121 | p[i ] = in[0]; |
| 122 | p[i+1] = in[1]; |
| 123 | } |
| 124 | } |
| 125 | |