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 <openthread/crypto.h>
37 #include <openthread/error.h>
38
39 #include "common/as_core_type.hpp"
40 #include "common/code_utils.hpp"
41 #include "common/debug.hpp"
42 #include "common/locator_getters.hpp"
43 #include "crypto/aes_ccm.hpp"
44 #include "crypto/ecdsa.hpp"
45 #include "crypto/hmac_sha256.hpp"
46
47 using namespace ot;
48 using namespace ot::Crypto;
49
otCryptoHmacSha256(const otCryptoKey * aKey,const uint8_t * aBuf,uint16_t aBufLength,otCryptoSha256Hash * aHash)50 void otCryptoHmacSha256(const otCryptoKey *aKey, const uint8_t *aBuf, uint16_t aBufLength, otCryptoSha256Hash *aHash)
51 {
52 HmacSha256 hmac;
53
54 AssertPointerIsNotNull(aBuf);
55
56 hmac.Start(AsCoreType(aKey));
57 hmac.Update(aBuf, aBufLength);
58 hmac.Finish(AsCoreType(aHash));
59 }
60
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)61 void otCryptoAesCcm(const otCryptoKey *aKey,
62 uint8_t aTagLength,
63 const void *aNonce,
64 uint8_t aNonceLength,
65 const void *aHeader,
66 uint32_t aHeaderLength,
67 void *aPlainText,
68 void *aCipherText,
69 uint32_t aLength,
70 bool aEncrypt,
71 void *aTag)
72 {
73 AesCcm aesCcm;
74
75 AssertPointerIsNotNull(aNonce);
76 AssertPointerIsNotNull(aPlainText);
77 AssertPointerIsNotNull(aCipherText);
78 AssertPointerIsNotNull(aTag);
79
80 aesCcm.SetKey(AsCoreType(aKey));
81 aesCcm.Init(aHeaderLength, aLength, aTagLength, aNonce, aNonceLength);
82
83 if (aHeaderLength != 0)
84 {
85 OT_ASSERT(aHeader != nullptr);
86 aesCcm.Header(aHeader, aHeaderLength);
87 }
88
89 aesCcm.Payload(aPlainText, aCipherText, aLength, aEncrypt ? AesCcm::kEncrypt : AesCcm::kDecrypt);
90 aesCcm.Finalize(aTag);
91 }
92
