1 /* crypto/bf/bf_skey.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <stdio.h>
60 #include <string.h>
61 #include <openssl/blowfish.h>
62 #include "bf_locl.h"
63 #include "bf_pi.h"
64
BF_set_key(BF_KEY * key,int len,const unsigned char * data)65 void BF_set_key(BF_KEY *key, int len, const unsigned char *data)
66 {
67 int i;
68 BF_LONG *p,ri,in[2];
69 const unsigned char *d,*end;
70
71
72 memcpy(key,&bf_init,sizeof(BF_KEY));
73 p=key->P;
74
75 if (len > ((BF_ROUNDS+2)*4)) len=(BF_ROUNDS+2)*4;
76
77 d=data;
78 end= &(data[len]);
79 for (i=0; i<(BF_ROUNDS+2); i++)
80 {
81 ri= *(d++);
82 if (d >= end) d=data;
83
84 ri<<=8;
85 ri|= *(d++);
86 if (d >= end) d=data;
87
88 ri<<=8;
89 ri|= *(d++);
90 if (d >= end) d=data;
91
92 ri<<=8;
93 ri|= *(d++);
94 if (d >= end) d=data;
95
96 p[i]^=ri;
97 }
98
99 in[0]=0L;
100 in[1]=0L;
101 for (i=0; i<(BF_ROUNDS+2); i+=2)
102 {
103 BF_encrypt(in,key);
104 p[i ]=in[0];
105 p[i+1]=in[1];
106 }
107
108 p=key->S;
109 for (i=0; i<4*256; i+=2)
110 {
111 BF_encrypt(in,key);
112 p[i ]=in[0];
113 p[i+1]=in[1];
114 }
115 }
116
117