blob: f6a53f8a6b9eebfea49f91baf1b8ddc39de3a953 [file] [log] [blame]
/*
* 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_EC_KEY_H_
#define SYSTEM_KEYMASTER_EC_KEY_H_
#include <openssl/ec.h>
#include "asymmetric_key.h"
namespace keymaster {
class EcKeyFactory : public AsymmetricKeyFactory {
public:
EcKeyFactory(const KeymasterContext* context) : AsymmetricKeyFactory(context) {}
keymaster_error_t GenerateKey(const AuthorizationSet& key_description,
KeymasterKeyBlob* key_blob, AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) override;
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) override;
keymaster_error_t CreateEmptyKey(const AuthorizationSet& hw_enforced,
const AuthorizationSet& sw_enforced,
UniquePtr<AsymmetricKey>* key) override;
keymaster_error_t UpdateImportKeyDescription(const AuthorizationSet& key_description,
keymaster_key_format_t key_format,
const KeymasterKeyBlob& key_material,
AuthorizationSet* updated_description,
uint32_t* key_size);
private:
static EC_GROUP* choose_group(size_t key_size_bits);
static keymaster_error_t get_group_size(const EC_GROUP& group, size_t* key_size_bits);
};
class EcdsaKeyFactory : public EcKeyFactory {
public:
EcdsaKeyFactory(const KeymasterContext* context) : EcKeyFactory(context) {}
keymaster_algorithm_t registry_key() const override { return KM_ALGORITHM_EC; }
int evp_key_type() override { return EVP_PKEY_EC; }
};
class EcdsaOperationFactory;
class EcKey : public AsymmetricKey {
public:
EcKey(const AuthorizationSet& hw_enforced, const AuthorizationSet& sw_enforced,
keymaster_error_t* error)
: AsymmetricKey(hw_enforced, sw_enforced, error) {}
bool InternalToEvp(EVP_PKEY* pkey) const override;
bool EvpToInternal(const EVP_PKEY* pkey) override;
EC_KEY* key() const { return EC_KEY_dup(ec_key_.get()); }
protected:
EcKey(EC_KEY* ec_key, const AuthorizationSet& hw_enforced, const AuthorizationSet& sw_enforced,
keymaster_error_t* error)
: AsymmetricKey(hw_enforced, sw_enforced, error), ec_key_(ec_key) {}
private:
UniquePtr<EC_KEY, EC_Delete> ec_key_;
};
} // namespace keymaster
#endif // SYSTEM_KEYMASTER_EC_KEY_H_