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 | |