1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
58 #include <openssl/blowfish.h>
62 * Blowfish as implemented from 'Blowfish: Springer-Verlag paper' (From
63 * LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, CAMBRIDGE
64 * SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993)
67 #if (BF_ROUNDS != 16) && (BF_ROUNDS != 20)
68 # error If you set BF_ROUNDS to some value other than 16 or 20, you will have \
72 void BF_encrypt(BF_LONG *data, const BF_KEY *key)
74 register BF_LONG l, r;
75 register const BF_LONG *p, *s;
83 BF_ENC(r, l, s, p[1]);
84 BF_ENC(l, r, s, p[2]);
85 BF_ENC(r, l, s, p[3]);
86 BF_ENC(l, r, s, p[4]);
87 BF_ENC(r, l, s, p[5]);
88 BF_ENC(l, r, s, p[6]);
89 BF_ENC(r, l, s, p[7]);
90 BF_ENC(l, r, s, p[8]);
91 BF_ENC(r, l, s, p[9]);
92 BF_ENC(l, r, s, p[10]);
93 BF_ENC(r, l, s, p[11]);
94 BF_ENC(l, r, s, p[12]);
95 BF_ENC(r, l, s, p[13]);
96 BF_ENC(l, r, s, p[14]);
97 BF_ENC(r, l, s, p[15]);
98 BF_ENC(l, r, s, p[16]);
100 BF_ENC(r, l, s, p[17]);
101 BF_ENC(l, r, s, p[18]);
102 BF_ENC(r, l, s, p[19]);
103 BF_ENC(l, r, s, p[20]);
105 r ^= p[BF_ROUNDS + 1];
107 data[1] = l & 0xffffffffU;
108 data[0] = r & 0xffffffffU;
111 #ifndef BF_DEFAULT_OPTIONS
113 void BF_decrypt(BF_LONG *data, const BF_KEY *key)
115 register BF_LONG l, r;
116 register const BF_LONG *p, *s;
123 l ^= p[BF_ROUNDS + 1];
125 BF_ENC(r, l, s, p[20]);
126 BF_ENC(l, r, s, p[19]);
127 BF_ENC(r, l, s, p[18]);
128 BF_ENC(l, r, s, p[17]);
130 BF_ENC(r, l, s, p[16]);
131 BF_ENC(l, r, s, p[15]);
132 BF_ENC(r, l, s, p[14]);
133 BF_ENC(l, r, s, p[13]);
134 BF_ENC(r, l, s, p[12]);
135 BF_ENC(l, r, s, p[11]);
136 BF_ENC(r, l, s, p[10]);
137 BF_ENC(l, r, s, p[9]);
138 BF_ENC(r, l, s, p[8]);
139 BF_ENC(l, r, s, p[7]);
140 BF_ENC(r, l, s, p[6]);
141 BF_ENC(l, r, s, p[5]);
142 BF_ENC(r, l, s, p[4]);
143 BF_ENC(l, r, s, p[3]);
144 BF_ENC(r, l, s, p[2]);
145 BF_ENC(l, r, s, p[1]);
148 data[1] = l & 0xffffffffU;
149 data[0] = r & 0xffffffffU;
152 void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
153 const BF_KEY *schedule, unsigned char *ivec, int encrypt)
155 register BF_LONG tin0, tin1;
156 register BF_LONG tout0, tout1, xor0, xor1;
157 register long l = length;
164 for (l -= 8; l >= 0; l -= 8) {
171 BF_encrypt(tin, schedule);
178 n2ln(in, tin0, tin1, l + 8);
183 BF_encrypt(tin, schedule);
195 for (l -= 8; l >= 0; l -= 8) {
200 BF_decrypt(tin, schedule);
201 tout0 = tin[0] ^ xor0;
202 tout1 = tin[1] ^ xor1;
213 BF_decrypt(tin, schedule);
214 tout0 = tin[0] ^ xor0;
215 tout1 = tin[1] ^ xor1;
216 l2nn(tout0, tout1, out, l + 8);
223 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;