1 /*
2 * Copyright (c) 2016, The OpenThread Authors.
3 * 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 are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /**
30 * @file
31 * This file implements SHA-256.
32 */
33
34 #include "sha256.hpp"
35
36 #include "common/debug.hpp"
37 #include "common/error.hpp"
38 #include "common/message.hpp"
39
40 namespace ot {
41 namespace Crypto {
42
Sha256(void)43 Sha256::Sha256(void)
44 {
45 mContext.mContext = mContextStorage;
46 mContext.mContextSize = sizeof(mContextStorage);
47 SuccessOrAssert(otPlatCryptoSha256Init(&mContext));
48 }
49
~Sha256(void)50 Sha256::~Sha256(void) { SuccessOrAssert(otPlatCryptoSha256Deinit(&mContext)); }
51
Start(void)52 void Sha256::Start(void) { SuccessOrAssert(otPlatCryptoSha256Start(&mContext)); }
53
Update(const void * aBuf,uint16_t aBufLength)54 void Sha256::Update(const void *aBuf, uint16_t aBufLength)
55 {
56 SuccessOrAssert(otPlatCryptoSha256Update(&mContext, aBuf, aBufLength));
57 }
58
Update(const Message & aMessage,uint16_t aOffset,uint16_t aLength)59 void Sha256::Update(const Message &aMessage, uint16_t aOffset, uint16_t aLength)
60 {
61 Message::Chunk chunk;
62
63 aMessage.GetFirstChunk(aOffset, aLength, chunk);
64
65 while (chunk.GetLength() > 0)
66 {
67 Update(chunk.GetBytes(), chunk.GetLength());
68 aMessage.GetNextChunk(aLength, chunk);
69 }
70 }
71
Finish(Hash & aHash)72 void Sha256::Finish(Hash &aHash) { SuccessOrAssert(otPlatCryptoSha256Finish(&mContext, aHash.m8, Hash::kSize)); }
73
74 } // namespace Crypto
75 } // namespace ot
76
