122 lines
4.7 KiB
C++
122 lines
4.7 KiB
C++
/*
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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_ECDSA_KEYMASTER1_OPERATION_H_
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#define SYSTEM_KEYMASTER_ECDSA_KEYMASTER1_OPERATION_H_
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#include <openssl/evp.h>
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#include <hardware/keymaster1.h>
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#include <keymaster/android_keymaster_utils.h>
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#include <keymaster/km_openssl/ecdsa_operation.h>
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#include <keymaster/legacy_support/keymaster1_engine.h>
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namespace keymaster {
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class EcdsaKeymaster1WrappedOperation {
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public:
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EcdsaKeymaster1WrappedOperation(keymaster_purpose_t purpose, const Keymaster1Engine* engine)
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: purpose_(purpose), operation_handle_(0), engine_(engine) {}
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~EcdsaKeymaster1WrappedOperation() {
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if (operation_handle_) Abort();
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}
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keymaster_error_t Begin(EVP_PKEY* ecdsa_key, const AuthorizationSet& input_params);
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keymaster_error_t PrepareFinish(EVP_PKEY* ecdsa_key, const AuthorizationSet& input_params);
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keymaster_error_t Abort();
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keymaster_error_t GetError(EVP_PKEY* ecdsa_key);
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keymaster_operation_handle_t GetOperationHandle() const { return operation_handle_; }
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protected:
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keymaster_purpose_t purpose_;
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keymaster_operation_handle_t operation_handle_;
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const Keymaster1Engine* engine_;
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};
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template <typename BaseOperation> class EcdsaKeymaster1Operation : public BaseOperation {
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typedef BaseOperation super;
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public:
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EcdsaKeymaster1Operation(AuthorizationSet&& hw_enforced, AuthorizationSet&& sw_enforced,
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keymaster_digest_t digest, EVP_PKEY* key,
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const Keymaster1Engine* engine)
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: BaseOperation(move(hw_enforced), move(sw_enforced), digest, key),
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wrapped_operation_(super::purpose(), engine) {
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// Shouldn't be instantiated for public key operations.
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assert(super::purpose() != KM_PURPOSE_VERIFY);
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assert(super::purpose() != KM_PURPOSE_ENCRYPT);
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}
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keymaster_error_t Begin(const AuthorizationSet& input_params,
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AuthorizationSet* output_params) override {
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keymaster_error_t error = wrapped_operation_.Begin(super::ecdsa_key_, input_params);
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if (error != KM_ERROR_OK) return error;
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return super::Begin(input_params, output_params);
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}
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keymaster_error_t Finish(const AuthorizationSet& input_params, const Buffer& input,
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const Buffer& signature, AuthorizationSet* output_params,
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Buffer* output) override {
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keymaster_error_t error = wrapped_operation_.PrepareFinish(super::ecdsa_key_, input_params);
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if (error != KM_ERROR_OK) return error;
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error = super::Finish(input_params, input, signature, output_params, output);
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if (wrapped_operation_.GetError(super::ecdsa_key_) != KM_ERROR_OK)
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error = wrapped_operation_.GetError(super::ecdsa_key_);
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return error;
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}
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keymaster_error_t Abort() override {
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keymaster_error_t error = wrapped_operation_.Abort();
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if (error != KM_ERROR_OK) return error;
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return super::Abort();
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}
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keymaster_operation_handle_t operation_handle() const override {
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return wrapped_operation_.GetOperationHandle();
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}
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private:
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EcdsaKeymaster1WrappedOperation wrapped_operation_;
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};
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/**
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* Factory that produces EcdsaKeymaster1Operations. This is instantiated and
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* provided by EcdsaKeymaster1KeyFactory.
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*/
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class EcdsaKeymaster1OperationFactory : public OperationFactory {
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public:
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EcdsaKeymaster1OperationFactory(keymaster_purpose_t purpose, const Keymaster1Engine* engine)
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: purpose_(purpose), engine_(engine) {}
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KeyType registry_key() const override { return KeyType(KM_ALGORITHM_EC, purpose_); }
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OperationPtr CreateOperation(Key&& key, const AuthorizationSet& begin_params,
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keymaster_error_t* error) override;
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const keymaster_digest_t* SupportedDigests(size_t* digest_count) const override;
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const keymaster_padding_t* SupportedPaddingModes(size_t* padding_mode_count) const override;
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private:
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keymaster_purpose_t purpose_;
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const Keymaster1Engine* engine_;
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};
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} // namespace keymaster
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#endif // SYSTEM_KEYMASTER_ECDSA_KEYMASTER1_OPERATION_H_
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