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 "modes_lcl.h"
61 #ifndef STRICT_ALIGNMENT
62 # define STRICT_ALIGNMENT 0
65 void CRYPTO_cbc128_encrypt(const unsigned char *in, unsigned char *out,
66 size_t len, const void *key,
67 unsigned char ivec[16], block128_f block)
70 const unsigned char *iv = ivec;
72 assert(in && out && key && ivec);
74 #if !defined(OPENSSL_SMALL_FOOTPRINT)
75 if (STRICT_ALIGNMENT &&
76 ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
79 out[n] = in[n] ^ iv[n];
80 (*block)(out, out, key);
88 for(n=0; n<16; n+=sizeof(size_t))
90 *(size_t*)(in+n) ^ *(size_t*)(iv+n);
91 (*block)(out, out, key);
100 for(n=0; n<16 && n<len; ++n)
101 out[n] = in[n] ^ iv[n];
104 (*block)(out, out, key);
114 void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out,
115 size_t len, const void *key,
116 unsigned char ivec[16], block128_f block)
119 union { size_t align; unsigned char c[16]; } tmp;
121 assert(in && out && key && ivec);
123 #if !defined(OPENSSL_SMALL_FOOTPRINT)
125 const unsigned char *iv = ivec;
127 if (STRICT_ALIGNMENT &&
128 ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
130 (*block)(in, out, key);
141 (*block)(in, out, key);
142 for(n=0; n<16; n+=sizeof(size_t))
143 *(size_t *)(out+n) ^= *(size_t *)(iv+n);
152 if (STRICT_ALIGNMENT &&
153 ((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
156 (*block)(in, tmp.c, key);
157 for(n=0; n<16; ++n) {
159 out[n] = tmp.c[n] ^ ivec[n];
170 (*block)(in, tmp.c, key);
171 for(n=0; n<16; n+=sizeof(size_t)) {
172 c = *(size_t *)(in+n);
174 *(size_t *)(tmp.c+n) ^ *(size_t *)(ivec+n);
175 *(size_t *)(ivec+n) = c;
186 (*block)(in, tmp.c, key);
187 for(n=0; n<16 && n<len; ++n) {
189 out[n] = tmp.c[n] ^ ivec[n];