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60 lines
2.1 KiB
60 lines
2.1 KiB
/* |
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* Copyright 2014 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef SYSTEM_KEYMASTER_AES_KEY_H_ |
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#define SYSTEM_KEYMASTER_AES_KEY_H_ |
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#include <openssl/aes.h> |
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#include "symmetric_key.h" |
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namespace keymaster { |
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const size_t kMinGcmTagLength = 12 * 8; |
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const size_t kMaxGcmTagLength = 16 * 8; |
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class AesKeyFactory : public SymmetricKeyFactory { |
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public: |
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explicit AesKeyFactory(const KeymasterContext* context) : SymmetricKeyFactory(context) {} |
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keymaster_algorithm_t registry_key() const { return KM_ALGORITHM_AES; } |
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keymaster_error_t LoadKey(const KeymasterKeyBlob& key_material, |
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const AuthorizationSet& additional_params, |
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const AuthorizationSet& hw_enforced, |
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const AuthorizationSet& sw_enforced, |
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UniquePtr<Key>* key) const override; |
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OperationFactory* GetOperationFactory(keymaster_purpose_t purpose) const override; |
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private: |
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bool key_size_supported(size_t key_size_bits) const override { |
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return key_size_bits == 128 || key_size_bits == 192 || key_size_bits == 256; |
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} |
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keymaster_error_t validate_algorithm_specific_new_key_params( |
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const AuthorizationSet& key_description) const override; |
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}; |
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class AesKey : public SymmetricKey { |
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public: |
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AesKey(const KeymasterKeyBlob& key_material, const AuthorizationSet& hw_enforced, |
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const AuthorizationSet& sw_enforced, keymaster_error_t* error) |
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: SymmetricKey(key_material, hw_enforced, sw_enforced, error) {} |
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}; |
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} // namespace keymaster |
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#endif // SYSTEM_KEYMASTER_AES_KEY_H_
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