1/*
2 * Copyright (c) 2000-2001,2005-2008,2010-2012,2014 Apple Inc. All Rights Reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24/* THIS FILE CONTAINS KERNEL CODE */
25
26#include "symCipher.h"
27
28#include <string.h>
29
30const SSLSymmetricCipherParams SSLCipherNullParams = {
31    .keyAlg = SSL_CipherAlgorithmNull,
32    .ivSize = 0,
33    .blockSize = 0,
34    .keySize = 0,
35    .cipherType = streamCipherType,
36};
37
38static int NullInit(
39    const SSLSymmetricCipherParams *cipher,
40    int encrypting,
41	uint8_t *key,
42	uint8_t *iv,
43	SymCipherContext *cipherCtx)
44{
45	return 0;
46}
47
48static int NullCrypt(
49	const uint8_t *src,
50	uint8_t *dest,
51    size_t len,
52	SymCipherContext cipherCt)
53{
54	if (src != dest)
55        memcpy(dest, src, len);
56    return 0;
57}
58
59static int NullFinish(
60	SymCipherContext cipherCtx)
61{
62	return 0;
63}
64
65const SSLSymmetricCipher SSLCipherNull = {
66    .params = &SSLCipherNullParams,
67    .c.cipher = {
68        .initialize = NullInit,
69        .encrypt = NullCrypt,
70        .decrypt = NullCrypt
71    },
72    .finish = NullFinish
73};
74