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53 lines
1.6 KiB
53 lines
1.6 KiB
/* |
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* Copyright 2015 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_KDF_H_ |
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#define SYSTEM_KEYMASTER_KDF_H_ |
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#include <hardware/keymaster_defs.h> |
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#include <keymaster/android_keymaster_utils.h> |
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#include <keymaster/serializable.h> |
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#include <keymaster/UniquePtr.h> |
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namespace keymaster { |
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/** |
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* A base class for wrapping different key derivation functions. |
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*/ |
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class Kdf { |
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public: |
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virtual ~Kdf() { memset_s(secret_key_.get(), 0, secret_key_len_); }; |
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Kdf(); |
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bool Init(keymaster_digest_t digest_type, const uint8_t* secret, size_t secret_len, |
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const uint8_t* salt, size_t salt_len); |
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virtual bool GenerateKey(const uint8_t* info, size_t info_len, uint8_t* output, |
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size_t output_len) = 0; |
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protected: |
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bool Uint32ToBigEndianByteArray(uint32_t number, uint8_t* output); |
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UniquePtr<uint8_t[]> secret_key_; |
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size_t secret_key_len_; |
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UniquePtr<uint8_t[]> salt_; |
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size_t salt_len_; |
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bool is_initialized_; |
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keymaster_digest_t digest_type_; |
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size_t digest_size_; |
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}; |
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} // namespace keymaster |
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#endif // SYSTEM_KEYMASTER_KDF_H_
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