1495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler/* 2495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * Copyright (C) 2016 The Android Open Source Project 3495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * 4495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * Licensed under the Apache License, Version 2.0 (the "License"); 5495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * you may not use this file except in compliance with the License. 6495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * You may obtain a copy of the License at 7495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * 8495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * http://www.apache.org/licenses/LICENSE-2.0 9495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * 10495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * Unless required by applicable law or agreed to in writing, software 11495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * distributed under the License is distributed on an "AS IS" BASIS, 12495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * See the License for the specific language governing permissions and 14495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler * limitations under the License. 15495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler */ 16495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler 17495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler#ifndef NVRAM_CORE_CRYPTO_H_ 18495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler#define NVRAM_CORE_CRYPTO_H_ 19495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler 20495f9ee73930daca9992db691f3b577bf1abed7eMattias Nisslerextern "C" { 21495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler#include <stddef.h> 22495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler#include <stdint.h> 23495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler} // extern "C" 24495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler 25495f9ee73930daca9992db691f3b577bf1abed7eMattias Nisslernamespace nvram { 26495f9ee73930daca9992db691f3b577bf1abed7eMattias Nisslernamespace crypto { 27495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler 28495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler// Size of a SHA-256 digest in bytes. 29495f9ee73930daca9992db691f3b577bf1abed7eMattias Nisslerconstexpr size_t kSHA256DigestSize = 32; 30495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler 31495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler// Computes the SHA-256 digest of the |data_size| input bytes stored at |data|. 32495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler// The digest is written to |digest|, which is a buffer of size |digest_size|. 33495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler// Note that |digest_size| doesn't have to match SHA-256's output size of 32 34495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler// bytes. If it doesn't the digest is truncated or zero-padded as necessary. 35495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler// 36495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler// Returns true if the digest was computed successfully, false otherwise. 37495f9ee73930daca9992db691f3b577bf1abed7eMattias Nisslervoid SHA256(const uint8_t* data, 38495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler size_t data_size, 39495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler uint8_t* digest, 40495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler size_t digest_size); 41495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler 42495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler} // namespace crypto 43e52a7f4addee2c1b6b85fbd445890ccc1c5fc2d1Rahul Chaudhry} // namespace nvram 44495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler 45495f9ee73930daca9992db691f3b577bf1abed7eMattias Nissler#endif // NVRAM_CORE_CRYPTO_H_ 46