secure_storage.h

/*
 * Copyright 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.
 */

extern "C" {

#include <errno.h>

#include <lib/storage/storage.h>

}  // extern "C"

#include "secure_storage_interface.h"

namespace avb {

// Implementation of SecureStorageInterface that uses Trusty's
// secure storage library
class SecureStorage : public SecureStorageInterface {
 public:
  ~SecureStorage() override;
  int open(const char* name) override;
  int delete_file(const char* name) override;
  int read(uint64_t off, void* buf, size_t size) const override;
  int get_file_size(uint64_t* size) const override;
  int write(uint64_t off, const void* buf, size_t size) const override;

 private:
  void close();

  storage_session_t session_handle_ = 0;
  file_handle_t file_handle_ = 0;
  int error_ = -EINVAL;
};

}  // namespace avb