| /* |
| * 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) const 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) const override; |
| |
| keymaster_error_t CreateEmptyKey(const AuthorizationSet& hw_enforced, |
| const AuthorizationSet& sw_enforced, |
| UniquePtr<AsymmetricKey>* key) const 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) const; |
| |
| 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) {} |
| |
| OperationFactory* GetOperationFactory(keymaster_purpose_t purpose) const override; |
| |
| keymaster_algorithm_t keymaster_key_type() const override { return KM_ALGORITHM_EC; } |
| int evp_key_type() const 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_ |