1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef CPP_ESE_H_ 18 #define CPP_ESE_H_ 19 20 #include <vector> 21 22 #include <ese/ese.h> 23 24 namespace android { 25 26 /** 27 * Mockable wrapper for libese's C API. 28 * 29 * `init` and `open` must be implemented to select the appropriate HW implementation. 30 */ 31 class EseInterface { 32 public: 33 EseInterface() : mEse(nullptr) {} 34 virtual ~EseInterface() = default; 35 36 virtual void init() = 0; 37 virtual int open() = 0; 38 virtual void close() = 0; 39 40 virtual const char* name() { return ese_name(mEse); } 41 42 /** 43 * Doesn't match the libese interface perfectly as this uses vectors instead 44 * of raw C-style arrays but it makes it much easier to mock/test. 45 */ 46 virtual int transceive(const std::vector<uint8_t>& tx, std::vector<uint8_t>& rx) { 47 return ese_transceive(mEse, 48 tx.data(), static_cast<uint32_t>(tx.size()), 49 rx.data(), static_cast<uint32_t>(rx.size())); 50 } 51 52 // TODO: overload transceive for ese_transceive_sg 53 54 virtual bool error() { return ese_error(mEse); } 55 virtual const char* error_message() { return ese_error_message(mEse); } 56 virtual int error_code() { return ese_error_code(mEse); } 57 58 /** 59 * This is needed in order to call the applet libraries written in C. We 60 * should work out a better way to do this. 61 */ 62 ::EseInterface* ese_interface() { return mEse; } 63 64 protected: 65 ::EseInterface* mEse; 66 }; 67 68 } // namespace android 69 70 #endif // CPP_ESE_H_ 71
