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.]
59 #include <openssl/rc5.h>
62 void RC5_32_cbc_encrypt(const unsigned char *in, unsigned char *out,
63 long length, RC5_32_KEY *ks, unsigned char *iv,
66 register unsigned long tin0, tin1;
67 register unsigned long tout0, tout1, xor0, xor1;
68 register long l = length;
75 for (l -= 8; l >= 0; l -= 8) {
82 RC5_32_encrypt(tin, ks);
89 c2ln(in, tin0, tin1, l + 8);
94 RC5_32_encrypt(tin, ks);
106 for (l -= 8; l >= 0; l -= 8) {
111 RC5_32_decrypt(tin, ks);
112 tout0 = tin[0] ^ xor0;
113 tout1 = tin[1] ^ xor1;
124 RC5_32_decrypt(tin, ks);
125 tout0 = tin[0] ^ xor0;
126 tout1 = tin[1] ^ xor1;
127 l2cn(tout0, tout1, out, l + 8);
134 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
138 void RC5_32_encrypt(unsigned long *d, RC5_32_KEY *key)
146 E_RC5_32(a, b, s, 2);
147 E_RC5_32(a, b, s, 4);
148 E_RC5_32(a, b, s, 6);
149 E_RC5_32(a, b, s, 8);
150 E_RC5_32(a, b, s, 10);
151 E_RC5_32(a, b, s, 12);
152 E_RC5_32(a, b, s, 14);
153 E_RC5_32(a, b, s, 16);
154 if (key->rounds == 12) {
155 E_RC5_32(a, b, s, 18);
156 E_RC5_32(a, b, s, 20);
157 E_RC5_32(a, b, s, 22);
158 E_RC5_32(a, b, s, 24);
159 } else if (key->rounds == 16) {
160 /* Do a full expansion to avoid a jump */
161 E_RC5_32(a, b, s, 18);
162 E_RC5_32(a, b, s, 20);
163 E_RC5_32(a, b, s, 22);
164 E_RC5_32(a, b, s, 24);
165 E_RC5_32(a, b, s, 26);
166 E_RC5_32(a, b, s, 28);
167 E_RC5_32(a, b, s, 30);
168 E_RC5_32(a, b, s, 32);
174 void RC5_32_decrypt(unsigned long *d, RC5_32_KEY *key)
182 if (key->rounds == 16) {
183 D_RC5_32(a, b, s, 32);
184 D_RC5_32(a, b, s, 30);
185 D_RC5_32(a, b, s, 28);
186 D_RC5_32(a, b, s, 26);
187 /* Do a full expansion to avoid a jump */
188 D_RC5_32(a, b, s, 24);
189 D_RC5_32(a, b, s, 22);
190 D_RC5_32(a, b, s, 20);
191 D_RC5_32(a, b, s, 18);
192 } else if (key->rounds == 12) {
193 D_RC5_32(a, b, s, 24);
194 D_RC5_32(a, b, s, 22);
195 D_RC5_32(a, b, s, 20);
196 D_RC5_32(a, b, s, 18);
198 D_RC5_32(a, b, s, 16);
199 D_RC5_32(a, b, s, 14);
200 D_RC5_32(a, b, s, 12);
201 D_RC5_32(a, b, s, 10);
202 D_RC5_32(a, b, s, 8);
203 D_RC5_32(a, b, s, 6);
204 D_RC5_32(a, b, s, 4);
205 D_RC5_32(a, b, s, 2);