1 /* ====================================================================
2 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * openssl-core@openssl.org.
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
51 #include <openssl/crypto.h>
52 #include "modes_lcl.h"
55 #if !defined(STRICT_ALIGNMENT) && !defined(PEDANTIC)
56 # define STRICT_ALIGNMENT 0
59 void CRYPTO_cbc128_encrypt(const unsigned char *in, unsigned char *out,
60 size_t len, const void *key,
61 unsigned char ivec[16], block128_f block)
64 const unsigned char *iv = ivec;
66 #if !defined(OPENSSL_SMALL_FOOTPRINT)
67 if (STRICT_ALIGNMENT &&
68 ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != 0) {
70 for (n = 0; n < 16; ++n)
71 out[n] = in[n] ^ iv[n];
72 (*block) (out, out, key);
80 for (n = 0; n < 16; n += sizeof(size_t))
81 *(size_t *)(out + n) =
82 *(size_t *)(in + n) ^ *(size_t *)(iv + n);
83 (*block) (out, out, key);
92 for (n = 0; n < 16 && n < len; ++n)
93 out[n] = in[n] ^ iv[n];
96 (*block) (out, out, key);
104 memcpy(ivec, iv, 16);
107 void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out,
108 size_t len, const void *key,
109 unsigned char ivec[16], block128_f block)
113 size_t t[16 / sizeof(size_t)];
117 #if !defined(OPENSSL_SMALL_FOOTPRINT)
119 const unsigned char *iv = ivec;
121 if (STRICT_ALIGNMENT &&
122 ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != 0) {
124 (*block) (in, out, key);
125 for (n = 0; n < 16; ++n)
132 } else if (16 % sizeof(size_t) == 0) { /* always true */
134 size_t *out_t = (size_t *)out, *iv_t = (size_t *)iv;
136 (*block) (in, out, key);
137 for (n = 0; n < 16 / sizeof(size_t); n++)
145 memcpy(ivec, iv, 16);
147 if (STRICT_ALIGNMENT &&
148 ((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != 0) {
151 (*block) (in, tmp.c, key);
152 for (n = 0; n < 16; ++n) {
154 out[n] = tmp.c[n] ^ ivec[n];
161 } else if (16 % sizeof(size_t) == 0) { /* always true */
163 size_t c, *out_t = (size_t *)out, *ivec_t = (size_t *)ivec;
164 const size_t *in_t = (const size_t *)in;
166 (*block) (in, tmp.c, key);
167 for (n = 0; n < 16 / sizeof(size_t); n++) {
169 out_t[n] = tmp.t[n] ^ ivec_t[n];
181 (*block) (in, tmp.c, key);
182 for (n = 0; n < 16 && n < len; ++n) {
184 out[n] = tmp.c[n] ^ ivec[n];