1*7ba4dab5SXin Li /* 2*7ba4dab5SXin Li * Copyright (C) 2016 The Android Open Source Project 3*7ba4dab5SXin Li * 4*7ba4dab5SXin Li * Licensed under the Apache License, Version 2.0 (the "License"); 5*7ba4dab5SXin Li * you may not use this file except in compliance with the License. 6*7ba4dab5SXin Li * You may obtain a copy of the License at 7*7ba4dab5SXin Li * 8*7ba4dab5SXin Li * http://www.apache.org/licenses/LICENSE-2.0 9*7ba4dab5SXin Li * 10*7ba4dab5SXin Li * Unless required by applicable law or agreed to in writing, software 11*7ba4dab5SXin Li * distributed under the License is distributed on an "AS IS" BASIS, 12*7ba4dab5SXin Li * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13*7ba4dab5SXin Li * See the License for the specific language governing permissions and 14*7ba4dab5SXin Li * limitations under the License. 15*7ba4dab5SXin Li */ 16*7ba4dab5SXin Li 17*7ba4dab5SXin Li #ifndef NVRAM_CORE_CRYPTO_H_ 18*7ba4dab5SXin Li #define NVRAM_CORE_CRYPTO_H_ 19*7ba4dab5SXin Li 20*7ba4dab5SXin Li extern "C" { 21*7ba4dab5SXin Li #include <stddef.h> 22*7ba4dab5SXin Li #include <stdint.h> 23*7ba4dab5SXin Li } // extern "C" 24*7ba4dab5SXin Li 25*7ba4dab5SXin Li namespace nvram { 26*7ba4dab5SXin Li namespace crypto { 27*7ba4dab5SXin Li 28*7ba4dab5SXin Li // Size of a SHA-256 digest in bytes. 29*7ba4dab5SXin Li constexpr size_t kSHA256DigestSize = 32; 30*7ba4dab5SXin Li 31*7ba4dab5SXin Li // Computes the SHA-256 digest of the |data_size| input bytes stored at |data|. 32*7ba4dab5SXin Li // The digest is written to |digest|, which is a buffer of size |digest_size|. 33*7ba4dab5SXin Li // Note that |digest_size| doesn't have to match SHA-256's output size of 32 34*7ba4dab5SXin Li // bytes. If it doesn't the digest is truncated or zero-padded as necessary. 35*7ba4dab5SXin Li // 36*7ba4dab5SXin Li // Returns true if the digest was computed successfully, false otherwise. 37*7ba4dab5SXin Li void SHA256(const uint8_t* data, 38*7ba4dab5SXin Li size_t data_size, 39*7ba4dab5SXin Li uint8_t* digest, 40*7ba4dab5SXin Li size_t digest_size); 41*7ba4dab5SXin Li 42*7ba4dab5SXin Li } // namespace crypto 43*7ba4dab5SXin Li } // namespace nvram 44*7ba4dab5SXin Li 45*7ba4dab5SXin Li #endif // NVRAM_CORE_CRYPTO_H_ 46