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.]
61 /* Blowfish as implemented from 'Blowfish: Springer-Verlag paper'
62 * (From LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION,
63 * CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993)
66 #if (BF_ROUNDS != 16) && (BF_ROUNDS != 20)
67 #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)
75 register BF_LONG l, r;
76 register const BF_LONG *p, *s;
84 BF_ENC(r, l, s, p[ 1]);
85 BF_ENC(l, r, s, p[ 2]);
86 BF_ENC(r, l, s, p[ 3]);
87 BF_ENC(l, r, s, p[ 4]);
88 BF_ENC(r, l, s, p[ 5]);
89 BF_ENC(l, r, s, p[ 6]);
90 BF_ENC(r, l, s, p[ 7]);
91 BF_ENC(l, r, s, p[ 8]);
92 BF_ENC(r, l, s, p[ 9]);
93 BF_ENC(l, r, s, p[10]);
94 BF_ENC(r, l, s, p[11]);
95 BF_ENC(l, r, s, p[12]);
96 BF_ENC(r, l, s, p[13]);
97 BF_ENC(l, r, s, p[14]);
98 BF_ENC(r, l, s, p[15]);
99 BF_ENC(l, r, s, p[16]);
101 BF_ENC(r, l, s, p[17]);
102 BF_ENC(l, r, s, p[18]);
103 BF_ENC(r, l, s, p[19]);
104 BF_ENC(l, r, s, p[20]);
106 r ^= p[BF_ROUNDS + 1];
108 data[1] = l & 0xffffffffL;
109 data[0] = r & 0xffffffffL;
111 register BF_LONG l, r, t, *k;
140 r ^= k[BF_ROUNDS + 1];
142 data[1] = l & 0xffffffffL;
143 data[0] = r & 0xffffffffL;
147 #ifndef BF_DEFAULT_OPTIONS
149 void BF_decrypt(BF_LONG *data, const BF_KEY *key)
152 register const BF_LONG *p, *s;
153 register BF_LONG l, r;
160 l ^= p[BF_ROUNDS + 1];
162 BF_ENC(r, l, s, p[20]);
163 BF_ENC(l, r, s, p[19]);
164 BF_ENC(r, l, s, p[18]);
165 BF_ENC(l, r, s, p[17]);
167 BF_ENC(r, l, s, p[16]);
168 BF_ENC(l, r, s, p[15]);
169 BF_ENC(r, l, s, p[14]);
170 BF_ENC(l, r, s, p[13]);
171 BF_ENC(r, l, s, p[12]);
172 BF_ENC(l, r, s, p[11]);
173 BF_ENC(r, l, s, p[10]);
174 BF_ENC(l, r, s, p[ 9]);
175 BF_ENC(r, l, s, p[ 8]);
176 BF_ENC(l, r, s, p[ 7]);
177 BF_ENC(r, l, s, p[ 6]);
178 BF_ENC(l, r, s, p[ 5]);
179 BF_ENC(r, l, s, p[ 4]);
180 BF_ENC(l, r, s, p[ 3]);
181 BF_ENC(r, l, s, p[ 2]);
182 BF_ENC(l, r, s, p[ 1]);
185 data[1] = l & 0xffffffffL;
186 data[0] = r & 0xffffffffL;
188 register BF_LONG l, r, t, *k;
194 l ^= k[BF_ROUNDS + 1];
219 data[1] = l & 0xffffffffL;
220 data[0] = r & 0xffffffffL;
224 void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
225 const BF_KEY *schedule, unsigned char *ivec, int encrypt)
227 register BF_LONG tin0, tin1;
228 register BF_LONG tout0, tout1, xor0, xor1;
229 register long l = length;
236 for (l -= 8; l >= 0; l -= 8) {
243 BF_encrypt(tin, schedule);
250 n2ln(in, tin0, tin1, l + 8);
255 BF_encrypt(tin, schedule);
267 for (l -= 8; l >= 0; l -= 8) {
272 BF_decrypt(tin, schedule);
273 tout0 = tin[0] ^ xor0;
274 tout1 = tin[1] ^ xor1;
285 BF_decrypt(tin, schedule);
286 tout0 = tin[0] ^ xor0;
287 tout1 = tin[1] ^ xor1;
288 l2nn(tout0, tout1, out, l + 8);
295 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;