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/*
* Copyright 2015 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 SYSTEM_KEYMASTER_KEY_FACTORY_H_
#define SYSTEM_KEYMASTER_KEY_FACTORY_H_
#include <hardware/keymaster_defs.h>
#include <keymaster/authorization_set.h>
namespace keymaster {
class Key;
class KeymasterContext;
class OperationFactory;
template<typename BlobType> struct TKeymasterBlob;
typedef TKeymasterBlob<keymaster_key_blob_t> KeymasterKeyBlob;
/**
* KeyFactory is a abstraction that encapsulats the knowledge of how to build and parse a specifiec
* subclass of Key.
*/
class KeyFactory {
public:
virtual ~KeyFactory() {}
// Factory methods.
virtual keymaster_error_t GenerateKey(const AuthorizationSet& key_description,
KeymasterKeyBlob* key_blob, AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const = 0;
virtual keymaster_error_t ImportKey(const AuthorizationSet& key_description,
keymaster_key_format_t input_key_material_format,
const KeymasterKeyBlob& input_key_material,
KeymasterKeyBlob* output_key_blob,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const = 0;
virtual keymaster_error_t LoadKey(KeymasterKeyBlob&& key_material,
const AuthorizationSet& additional_params,
AuthorizationSet&& hw_enforced,
AuthorizationSet&& sw_enforced,
UniquePtr<Key>* key) const = 0;
virtual OperationFactory* GetOperationFactory(keymaster_purpose_t purpose) const = 0;
// Informational methods.
virtual const keymaster_key_format_t* SupportedImportFormats(size_t* format_count) const = 0;
virtual const keymaster_key_format_t* SupportedExportFormats(size_t* format_count) const = 0;
};
} // namespace keymaster
#endif // SYSTEM_KEYMASTER_KEY_FACTORY_H_
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