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 the OpenThread Crypto API.
32 */
33
34 #include "openthread-core-config.h"
35
36 #include "crypto/aes_ccm.hpp"
37 #include "crypto/ecdsa.hpp"
38 #include "crypto/hmac_sha256.hpp"
39 #include "instance/instance.hpp"
40
41 using namespace ot;
42 using namespace ot::Crypto;
43
otCryptoHmacSha256(const otCryptoKey * aKey,const uint8_t * aBuf,uint16_t aBufLength,otCryptoSha256Hash * aHash)44 void otCryptoHmacSha256(const otCryptoKey *aKey, const uint8_t *aBuf, uint16_t aBufLength, otCryptoSha256Hash *aHash)
45 {
46 HmacSha256 hmac;
47
48 AssertPointerIsNotNull(aBuf);
49
50 hmac.Start(AsCoreType(aKey));
51 hmac.Update(aBuf, aBufLength);
52 hmac.Finish(AsCoreType(aHash));
53 }
54
otCryptoAesCcm(const otCryptoKey * aKey,uint8_t aTagLength,const void * aNonce,uint8_t aNonceLength,const void * aHeader,uint32_t aHeaderLength,void * aPlainText,void * aCipherText,uint32_t aLength,bool aEncrypt,void * aTag)55 void otCryptoAesCcm(const otCryptoKey *aKey,
56 uint8_t aTagLength,
57 const void *aNonce,
58 uint8_t aNonceLength,
59 const void *aHeader,
60 uint32_t aHeaderLength,
61 void *aPlainText,
62 void *aCipherText,
63 uint32_t aLength,
64 bool aEncrypt,
65 void *aTag)
66 {
67 AesCcm aesCcm;
68
69 AssertPointerIsNotNull(aNonce);
70 AssertPointerIsNotNull(aPlainText);
71 AssertPointerIsNotNull(aCipherText);
72 AssertPointerIsNotNull(aTag);
73
74 aesCcm.SetKey(AsCoreType(aKey));
75 aesCcm.Init(aHeaderLength, aLength, aTagLength, aNonce, aNonceLength);
76
77 if (aHeaderLength != 0)
78 {
79 OT_ASSERT(aHeader != nullptr);
80 aesCcm.Header(aHeader, aHeaderLength);
81 }
82
83 aesCcm.Payload(aPlainText, aCipherText, aLength, aEncrypt ? AesCcm::kEncrypt : AesCcm::kDecrypt);
84 aesCcm.Finalize(aTag);
85 }
86
