| /* |
| * |
| * Copyright (c) 2013-2017 Nest Labs, Inc. |
| * All rights reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * @file |
| * This file defines a template object for doing keyed-hash |
| * message authentication code (HMAC) and specialized objects |
| * for HMAC with SHA-1 and SHA-256. |
| * |
| */ |
| |
| #ifndef HMAC_H_ |
| #define HMAC_H_ |
| |
| #include "WeaveCrypto.h" |
| #include "HashAlgos.h" |
| |
| namespace nl { |
| namespace Weave { |
| namespace Crypto { |
| |
| template <class H> |
| class NL_DLL_EXPORT HMAC |
| { |
| public: |
| enum |
| { |
| kDigestLength = H::kHashLength |
| }; |
| |
| HMAC(void); |
| ~HMAC(void); |
| |
| void Begin(const uint8_t *keyData, uint16_t keyLen); |
| void AddData(const uint8_t *msgData, uint16_t dataLen); |
| #if WEAVE_WITH_OPENSSL |
| void AddData(const BIGNUM& num); |
| #endif |
| void Finish(uint8_t *hashBuf); |
| void Reset(void); |
| |
| private: |
| enum |
| { |
| kBlockLength = H::kBlockLength |
| }; |
| |
| H mHash; |
| uint8_t mKey[kBlockLength]; |
| uint16_t mKeyLen; |
| }; |
| |
| typedef HMAC<Platform::Security::SHA1> HMACSHA1; |
| |
| typedef HMAC<Platform::Security::SHA256> HMACSHA256; |
| |
| |
| } // namespace Crypto |
| } // namespace Weave |
| } // namespace nl |
| |
| #endif /* HMAC_H_ */ |