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
BF_set_key(BF_KEY * key,int len,const unsigned char * data)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