| /* |
| * 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 |
| } // namespace nvram |
| |
| #endif // NVRAM_CORE_CRYPTO_H_ |