/*
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* Copyright (C) 2017 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 CPP_ESE_H_
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#define CPP_ESE_H_
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#include <vector>
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#include <ese/ese.h>
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namespace android {
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/**
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* Mockable wrapper for libese's C API.
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*
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* `init` and `open` must be implemented to select the appropriate HW implementation.
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*/
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class EseInterface {
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public:
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EseInterface() : mEse(nullptr) {}
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virtual ~EseInterface() = default;
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virtual void init() = 0;
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virtual int open() = 0;
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virtual void close() = 0;
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virtual const char* name() { return ese_name(mEse); }
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/**
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* Doesn't match the libese interface perfectly as this uses vectors instead
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* of raw C-style arrays but it makes it much easier to mock/test.
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*/
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virtual int transceive(const std::vector<uint8_t>& tx, std::vector<uint8_t>& rx) {
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return ese_transceive(mEse,
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tx.data(), static_cast<uint32_t>(tx.size()),
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rx.data(), static_cast<uint32_t>(rx.size()));
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}
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// TODO: overload transceive for ese_transceive_sg
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virtual bool error() { return ese_error(mEse); }
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virtual const char* error_message() { return ese_error_message(mEse); }
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virtual int error_code() { return ese_error_code(mEse); }
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/**
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* This is needed in order to call the applet libraries written in C. We
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* should work out a better way to do this.
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*/
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::EseInterface* ese_interface() { return mEse; }
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protected:
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::EseInterface* mEse;
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};
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} // namespace android
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#endif // CPP_ESE_H_
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