77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
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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_HMAC_OPERATION_H_
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#define SYSTEM_KEYMASTER_HMAC_OPERATION_H_
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#include <keymaster/operation.h>
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#include <openssl/hmac.h>
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namespace keymaster {
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class HmacOperation : public Operation {
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public:
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HmacOperation(Key&& key, keymaster_purpose_t purpose, keymaster_digest_t digest,
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size_t mac_length, size_t min_mac_length);
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~HmacOperation();
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virtual keymaster_error_t Begin(const AuthorizationSet& input_params,
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AuthorizationSet* output_params);
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virtual keymaster_error_t Update(const AuthorizationSet& additional_params, const Buffer& input,
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AuthorizationSet* output_params, Buffer* output,
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size_t* input_consumed);
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virtual keymaster_error_t Abort();
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virtual keymaster_error_t Finish(const AuthorizationSet& additional_params, const Buffer& input,
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const Buffer& signature, AuthorizationSet* output_params,
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Buffer* output);
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keymaster_error_t error() { return error_; }
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private:
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HMAC_CTX ctx_;
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keymaster_error_t error_;
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const size_t mac_length_;
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const size_t min_mac_length_;
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};
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/**
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* Abstract base for HMAC operation factories. This class does all of the work to create
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* HMAC operations.
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*/
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class HmacOperationFactory : public OperationFactory {
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public:
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virtual KeyType registry_key() const { return KeyType(KM_ALGORITHM_HMAC, purpose()); }
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virtual OperationPtr CreateOperation(Key&& key, const AuthorizationSet& begin_params,
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keymaster_error_t* error);
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virtual const keymaster_digest_t* SupportedDigests(size_t* digest_count) const;
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virtual keymaster_purpose_t purpose() const = 0;
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};
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class HmacSignOperationFactory : public HmacOperationFactory {
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keymaster_purpose_t purpose() const { return KM_PURPOSE_SIGN; }
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};
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class HmacVerifyOperationFactory : public HmacOperationFactory {
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keymaster_purpose_t purpose() const { return KM_PURPOSE_VERIFY; }
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};
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} // namespace keymaster
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#endif // SYSTEM_KEYMASTER_HMAC_OPERATION_H_
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