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/*
* Copyright 2014 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_ASYMMETRIC_KEY_H
#define SYSTEM_KEYMASTER_ASYMMETRIC_KEY_H
#include <openssl/evp.h>
#include "key.h"
namespace keymaster {
class AsymmetricKeyFactory : public KeyFactory {
protected:
EVP_PKEY* ExtractEvpKey(keymaster_key_format_t key_format,
keymaster_algorithm_t expected_algorithm, const uint8_t* key_data,
size_t key_data_length, keymaster_error_t* error);
virtual const keymaster_key_format_t* SupportedImportFormats(size_t* format_count);
virtual const keymaster_key_format_t* SupportedExportFormats(size_t* format_count);
};
class AsymmetricKey : public Key {
public:
protected:
AsymmetricKey(const KeyBlob& blob) : Key(blob) {}
keymaster_error_t LoadKey(const UnencryptedKeyBlob& blob);
/**
* Return a copy of raw key material, in the key's preferred binary format.
*/
virtual keymaster_error_t key_material(UniquePtr<uint8_t[]>* material, size_t* size) const;
/**
* Return a copy of raw key material, in the specified format.
*/
virtual keymaster_error_t formatted_key_material(keymaster_key_format_t format,
UniquePtr<uint8_t[]>* material,
size_t* size) const;
protected:
AsymmetricKey(const AuthorizationSet& auths) : Key(auths) {}
private:
virtual int evp_key_type() = 0;
virtual bool InternalToEvp(EVP_PKEY* pkey) const = 0;
virtual bool EvpToInternal(const EVP_PKEY* pkey) = 0;
};
} // namespace keymaster
#endif // SYSTEM_KEYMASTER_ASYMMETRIC_KEY_H