1 /* crypto/bf/bf_enc.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
59 #include <openssl/blowfish.h>
63 * Blowfish as implemented from 'Blowfish: Springer-Verlag paper' (From
64 * LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, CAMBRIDGE
65 * SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993)
68 #if (BF_ROUNDS != 16) && (BF_ROUNDS != 20)
69 # error If you set BF_ROUNDS to some value other than 16 or 20, you will have \
73 void BF_encrypt(BF_LONG
*data
, const BF_KEY
*key
)
76 register BF_LONG l
, r
;
77 register const BF_LONG
*p
, *s
;
85 BF_ENC(r
, l
, s
, p
[1]);
86 BF_ENC(l
, r
, s
, p
[2]);
87 BF_ENC(r
, l
, s
, p
[3]);
88 BF_ENC(l
, r
, s
, p
[4]);
89 BF_ENC(r
, l
, s
, p
[5]);
90 BF_ENC(l
, r
, s
, p
[6]);
91 BF_ENC(r
, l
, s
, p
[7]);
92 BF_ENC(l
, r
, s
, p
[8]);
93 BF_ENC(r
, l
, s
, p
[9]);
94 BF_ENC(l
, r
, s
, p
[10]);
95 BF_ENC(r
, l
, s
, p
[11]);
96 BF_ENC(l
, r
, s
, p
[12]);
97 BF_ENC(r
, l
, s
, p
[13]);
98 BF_ENC(l
, r
, s
, p
[14]);
99 BF_ENC(r
, l
, s
, p
[15]);
100 BF_ENC(l
, r
, s
, p
[16]);
102 BF_ENC(r
, l
, s
, p
[17]);
103 BF_ENC(l
, r
, s
, p
[18]);
104 BF_ENC(r
, l
, s
, p
[19]);
105 BF_ENC(l
, r
, s
, p
[20]);
107 r
^= p
[BF_ROUNDS
+ 1];
109 data
[1] = l
& 0xffffffffL
;
110 data
[0] = r
& 0xffffffffL
;
112 register BF_LONG l
, r
, t
, *k
;
141 r
^= k
[BF_ROUNDS
+ 1];
143 data
[1] = l
& 0xffffffffL
;
144 data
[0] = r
& 0xffffffffL
;
148 #ifndef BF_DEFAULT_OPTIONS
150 void BF_decrypt(BF_LONG
*data
, const BF_KEY
*key
)
153 register BF_LONG l
, r
;
154 register const BF_LONG
*p
, *s
;
161 l
^= p
[BF_ROUNDS
+ 1];
163 BF_ENC(r
, l
, s
, p
[20]);
164 BF_ENC(l
, r
, s
, p
[19]);
165 BF_ENC(r
, l
, s
, p
[18]);
166 BF_ENC(l
, r
, s
, p
[17]);
168 BF_ENC(r
, l
, s
, p
[16]);
169 BF_ENC(l
, r
, s
, p
[15]);
170 BF_ENC(r
, l
, s
, p
[14]);
171 BF_ENC(l
, r
, s
, p
[13]);
172 BF_ENC(r
, l
, s
, p
[12]);
173 BF_ENC(l
, r
, s
, p
[11]);
174 BF_ENC(r
, l
, s
, p
[10]);
175 BF_ENC(l
, r
, s
, p
[9]);
176 BF_ENC(r
, l
, s
, p
[8]);
177 BF_ENC(l
, r
, s
, p
[7]);
178 BF_ENC(r
, l
, s
, p
[6]);
179 BF_ENC(l
, r
, s
, p
[5]);
180 BF_ENC(r
, l
, s
, p
[4]);
181 BF_ENC(l
, r
, s
, p
[3]);
182 BF_ENC(r
, l
, s
, p
[2]);
183 BF_ENC(l
, r
, s
, p
[1]);
186 data
[1] = l
& 0xffffffffL
;
187 data
[0] = r
& 0xffffffffL
;
189 register BF_LONG l
, r
, t
, *k
;
195 l
^= k
[BF_ROUNDS
+ 1];
220 data
[1] = l
& 0xffffffffL
;
221 data
[0] = r
& 0xffffffffL
;
225 void BF_cbc_encrypt(const unsigned char *in
, unsigned char *out
, long length
,
226 const BF_KEY
*schedule
, unsigned char *ivec
, int encrypt
)
228 register BF_LONG tin0
, tin1
;
229 register BF_LONG tout0
, tout1
, xor0
, xor1
;
230 register long l
= length
;
237 for (l
-= 8; l
>= 0; l
-= 8) {
244 BF_encrypt(tin
, schedule
);
251 n2ln(in
, tin0
, tin1
, l
+ 8);
256 BF_encrypt(tin
, schedule
);
268 for (l
-= 8; l
>= 0; l
-= 8) {
273 BF_decrypt(tin
, schedule
);
274 tout0
= tin
[0] ^ xor0
;
275 tout1
= tin
[1] ^ xor1
;
286 BF_decrypt(tin
, schedule
);
287 tout0
= tin
[0] ^ xor0
;
288 tout1
= tin
[1] ^ xor1
;
289 l2nn(tout0
, tout1
, out
, l
+ 8);
296 tin0
= tin1
= tout0
= tout1
= xor0
= xor1
= 0;