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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 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 void private_BF_set_key(BF_KEY *key, int len, const unsigned char *data) | |
73 #endif | |
74 { | |
75 int i; | |
76 BF_LONG *p,ri,in[2]; | |
77 const unsigned char *d,*end; | |
78 | |
79 | |
80 memcpy(key,&bf_init,sizeof(BF_KEY)); | |
81 p=key->P; | |
82 | |
83 if (len > ((BF_ROUNDS+2)*4)) len=(BF_ROUNDS+2)*4; | |
84 | |
85 d=data; | |
86 end= &(data[len]); | |
87 for (i=0; i<(BF_ROUNDS+2); i++) | |
88 { | |
89 ri= *(d++); | |
90 if (d >= end) d=data; | |
91 | |
92 ri<<=8; | |
93 ri|= *(d++); | |
94 if (d >= end) d=data; | |
95 | |
96 ri<<=8; | |
97 ri|= *(d++); | |
98 if (d >= end) d=data; | |
99 | |
100 ri<<=8; | |
101 ri|= *(d++); | |
102 if (d >= end) d=data; | |
103 | |
104 p[i]^=ri; | |
105 } | |
106 | |
107 in[0]=0L; | |
108 in[1]=0L; | |
109 for (i=0; i<(BF_ROUNDS+2); i+=2) | |
110 { | |
111 BF_encrypt(in,key); | |
112 p[i ]=in[0]; | |
113 p[i+1]=in[1]; | |
114 } | |
115 | |
116 p=key->S; | |
117 for (i=0; i<4*256; i+=2) | |
118 { | |
119 BF_encrypt(in,key); | |
120 p[i ]=in[0]; | |
121 p[i+1]=in[1]; | |
122 } | |
123 } | |
124 | |
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