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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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.
*/
#ifndef NVRAM_CORE_CRYPTO_H_
#define NVRAM_CORE_CRYPTO_H_
extern "C" {
#include <stddef.h>
#include <stdint.h>
} // extern "C"
namespace nvram {
namespace crypto {
// Size of a SHA-256 digest in bytes.
constexpr size_t kSHA256DigestSize = 32;
// Computes the SHA-256 digest of the |data_size| input bytes stored at |data|.
// The digest is written to |digest|, which is a buffer of size |digest_size|.
// Note that |digest_size| doesn't have to match SHA-256's output size of 32
// bytes. If it doesn't the digest is truncated or zero-padded as necessary.
//
// Returns true if the digest was computed successfully, false otherwise.
void SHA256(const uint8_t* data,
size_t data_size,
uint8_t* digest,
size_t digest_size);
} // namespace crypto
} // namespave nvram
#endif // NVRAM_CORE_CRYPTO_H_
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