3 * cbc_enc.c (DES_cbc_encrypt)
4 * des_enc.c (DES_ncbc_encrypt)
6 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
9 * This package is an SSL implementation written
10 * by Eric Young (eay@cryptsoft.com).
11 * The implementation was written so as to conform with Netscapes SSL.
13 * This library is free for commercial and non-commercial use as long as
14 * the following conditions are aheared to. The following conditions
15 * apply to all code found in this distribution, be it the RC4, RSA,
16 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
17 * included with this distribution is covered by the same copyright terms
18 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
20 * Copyright remains Eric Young's, and as such any Copyright notices in
21 * the code are not to be removed.
22 * If this package is used in a product, Eric Young should be given attribution
23 * as the author of the parts of the library used.
24 * This can be in the form of a textual message at program startup or
25 * in documentation (online or textual) provided with the package.
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
30 * 1. Redistributions of source code must retain the copyright
31 * notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 * notice, this list of conditions and the following disclaimer in the
34 * documentation and/or other materials provided with the distribution.
35 * 3. All advertising materials mentioning features or use of this software
36 * must display the following acknowledgement:
37 * "This product includes cryptographic software written by
38 * Eric Young (eay@cryptsoft.com)"
39 * The word 'cryptographic' can be left out if the rouines from the library
40 * being used are not cryptographic related :-).
41 * 4. If you include any Windows specific code (or a derivative thereof) from
42 * the apps directory (application code) you must include an acknowledgement:
43 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
45 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57 * The licence and distribution terms for any publically available version or
58 * derivative of this code cannot be changed. i.e. this code cannot simply be
59 * copied and put under another distribution licence
60 * [including the GNU Public Licence.]
65 #ifdef CBC_ENC_C__DONT_UPDATE_IV
66 void DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
67 DES_key_schedule *_schedule, DES_cblock *ivec, int enc)
69 void DES_ncbc_encrypt(const unsigned char *in, unsigned char *out,
70 long length, DES_key_schedule *_schedule,
71 DES_cblock *ivec, int enc)
74 register DES_LONG tin0, tin1;
75 register DES_LONG tout0, tout1, xor0, xor1;
76 register long l = length;
85 for (l -= 8; l >= 0; l -= 8) {
92 DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT);
99 c2ln(in, tin0, tin1, l + 8);
104 DES_encrypt1((DES_LONG *)tin, _schedule, DES_ENCRYPT);
110 #ifndef CBC_ENC_C__DONT_UPDATE_IV
118 for (l -= 8; l >= 0; l -= 8) {
123 DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT);
124 tout0 = tin[0] ^ xor0;
125 tout1 = tin[1] ^ xor1;
136 DES_encrypt1((DES_LONG *)tin, _schedule, DES_DECRYPT);
137 tout0 = tin[0] ^ xor0;
138 tout1 = tin[1] ^ xor1;
139 l2cn(tout0, tout1, out, l + 8);
140 #ifndef CBC_ENC_C__DONT_UPDATE_IV
145 #ifndef CBC_ENC_C__DONT_UPDATE_IV
151 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;