| // Copyright 2021 The Pigweed Authors |
| // |
| // 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 |
| // |
| // https://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. |
| |
| #pragma once |
| |
| #include "mbedtls/md.h" |
| |
| namespace pw::crypto::sha256::backend { |
| |
| enum Sha256State { |
| // --> kInitialized upon construction, without fail. |
| kInitialized, |
| // kInitialized --> kStarted upon the first Update() call. |
| kStarted, |
| // kStarted --> kFinalized upon the first Final() call. |
| kFinalized, |
| // --> kError upon any unexpected failure. |
| kError, |
| }; |
| |
| struct Sha256Context { |
| Sha256State state; |
| mbedtls_md_context_t native_context; |
| }; |
| |
| } // namespace pw::crypto::sha256::backend |