Line data Source code
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/crypto.h>
62 : #include <openssl/blowfish.h>
63 : #include "bf_locl.h"
64 : #include "bf_pi.h"
65 :
66 0 : void BF_set_key(BF_KEY *key, int len, const unsigned char *data)
67 : #ifdef OPENSSL_FIPS
68 : {
69 : fips_cipher_abort(BLOWFISH);
70 : private_BF_set_key(key, len, data);
71 : }
72 :
73 : void private_BF_set_key(BF_KEY *key, int len, const unsigned char *data)
74 : #endif
75 : {
76 : int i;
77 : BF_LONG *p, ri, in[2];
78 : const unsigned char *d, *end;
79 :
80 : memcpy(key, &bf_init, sizeof(BF_KEY));
81 0 : p = key->P;
82 :
83 0 : if (len > ((BF_ROUNDS + 2) * 4))
84 : len = (BF_ROUNDS + 2) * 4;
85 :
86 : d = data;
87 0 : end = &(data[len]);
88 0 : for (i = 0; i < (BF_ROUNDS + 2); i++) {
89 0 : ri = *(d++);
90 0 : if (d >= end)
91 : d = data;
92 :
93 0 : ri <<= 8;
94 0 : ri |= *(d++);
95 0 : if (d >= end)
96 : d = data;
97 :
98 0 : ri <<= 8;
99 0 : ri |= *(d++);
100 0 : if (d >= end)
101 : d = data;
102 :
103 0 : ri <<= 8;
104 0 : ri |= *(d++);
105 0 : if (d >= end)
106 : d = data;
107 :
108 0 : p[i] ^= ri;
109 : }
110 :
111 0 : in[0] = 0L;
112 0 : in[1] = 0L;
113 0 : for (i = 0; i < (BF_ROUNDS + 2); i += 2) {
114 0 : BF_encrypt(in, key);
115 0 : p[i] = in[0];
116 0 : p[i + 1] = in[1];
117 : }
118 :
119 0 : p = key->S;
120 0 : for (i = 0; i < 4 * 256; i += 2) {
121 0 : BF_encrypt(in, key);
122 0 : p[i] = in[0];
123 0 : p[i + 1] = in[1];
124 : }
125 0 : }
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