You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
2.2 KiB
58 lines
2.2 KiB
/* |
|
* 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_HMAC_KEY_H_ |
|
#define SYSTEM_KEYMASTER_HMAC_KEY_H_ |
|
|
|
#include "symmetric_key.h" |
|
|
|
namespace keymaster { |
|
|
|
const size_t kMinHmacLengthBits = 64; |
|
const size_t kMinHmacKeyLengthBits = 64; |
|
const size_t kMaxHmacKeyLengthBits = 2048; // Some RFC test cases require >1024-bit keys |
|
|
|
class HmacKeyFactory : public SymmetricKeyFactory { |
|
public: |
|
explicit HmacKeyFactory(const KeymasterContext* context) : SymmetricKeyFactory(context) {} |
|
|
|
keymaster_error_t LoadKey(const KeymasterKeyBlob& key_material, |
|
const AuthorizationSet& additional_params, |
|
const AuthorizationSet& hw_enforced, |
|
const AuthorizationSet& sw_enforced, |
|
UniquePtr<Key>* key) const override; |
|
|
|
OperationFactory* GetOperationFactory(keymaster_purpose_t purpose) const override; |
|
|
|
private: |
|
bool key_size_supported(size_t key_size_bits) const override { |
|
return key_size_bits > 0 && key_size_bits % 8 == 00 && |
|
key_size_bits >= kMinHmacKeyLengthBits && key_size_bits <= kMaxHmacKeyLengthBits; |
|
} |
|
keymaster_error_t validate_algorithm_specific_new_key_params( |
|
const AuthorizationSet& key_description) const override; |
|
}; |
|
|
|
class HmacKey : public SymmetricKey { |
|
public: |
|
HmacKey(const KeymasterKeyBlob& key_material, const AuthorizationSet& hw_enforced, |
|
const AuthorizationSet& sw_enforced, keymaster_error_t* error) |
|
: SymmetricKey(key_material, hw_enforced, sw_enforced, error) {} |
|
}; |
|
|
|
} // namespace keymaster |
|
|
|
#endif // SYSTEM_KEYMASTER_HMAC_KEY_H_
|
|
|