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diff --git a/src/lib/libcrypto/aes/aes_cbc.c b/src/lib/libcrypto/aes/aes_cbc.c
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1/* crypto/aes/aes_cbc.c -*- mode:C; c-file-style: "eay" -*- */
2/* ====================================================================
3 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * openssl-core@openssl.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 */
51
52#ifndef AES_DEBUG
53# ifndef NDEBUG
54# define NDEBUG
55# endif
56#endif
57#include <assert.h>
58
59#include <openssl/aes.h>
60#include "aes_locl.h"
61
62void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
63 const unsigned long length, const AES_KEY *key,
64 unsigned char *ivec, const int enc) {
65
66 unsigned long n;
67 unsigned long len = length;
68 unsigned char tmp[AES_BLOCK_SIZE];
69
70 assert(in && out && key && ivec);
71 assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
72
73 if (AES_ENCRYPT == enc) {
74 while (len >= AES_BLOCK_SIZE) {
75 for(n=0; n < AES_BLOCK_SIZE; ++n)
76 tmp[n] = in[n] ^ ivec[n];
77 AES_encrypt(tmp, out, key);
78 memcpy(ivec, out, AES_BLOCK_SIZE);
79 len -= AES_BLOCK_SIZE;
80 in += AES_BLOCK_SIZE;
81 out += AES_BLOCK_SIZE;
82 }
83 if (len) {
84 for(n=0; n < len; ++n)
85 tmp[n] = in[n] ^ ivec[n];
86 for(n=len; n < AES_BLOCK_SIZE; ++n)
87 tmp[n] = ivec[n];
88 AES_encrypt(tmp, tmp, key);
89 memcpy(out, tmp, AES_BLOCK_SIZE);
90 memcpy(ivec, tmp, AES_BLOCK_SIZE);
91 }
92 } else {
93 while (len >= AES_BLOCK_SIZE) {
94 memcpy(tmp, in, AES_BLOCK_SIZE);
95 AES_decrypt(in, out, key);
96 for(n=0; n < AES_BLOCK_SIZE; ++n)
97 out[n] ^= ivec[n];
98 memcpy(ivec, tmp, AES_BLOCK_SIZE);
99 len -= AES_BLOCK_SIZE;
100 in += AES_BLOCK_SIZE;
101 out += AES_BLOCK_SIZE;
102 }
103 if (len) {
104 memcpy(tmp, in, AES_BLOCK_SIZE);
105 AES_decrypt(tmp, tmp, key);
106 for(n=0; n < len; ++n)
107 out[n] ^= ivec[n];
108 memcpy(ivec, tmp, AES_BLOCK_SIZE);
109 }
110 }
111}