com.github.devnied.emvnfccard.parser.impl.ProviderWrapper Maven / Gradle / Ivy

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/*
 * Copyright (C) 2019 MILLAU Julien
 *
 * 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.
 */
package com.github.devnied.emvnfccard.parser.impl;

import com.github.devnied.emvnfccard.enums.CommandEnum;
import com.github.devnied.emvnfccard.enums.SwEnum;
import com.github.devnied.emvnfccard.exception.CommunicationException;
import com.github.devnied.emvnfccard.parser.IProvider;
import com.github.devnied.emvnfccard.utils.CommandApdu;
import com.github.devnied.emvnfccard.utils.ResponseUtils;

/**
 * Wrapper for IProvider
 * @author MILLAU Julien
 *
 */
public class ProviderWrapper implements IProvider{

	/**
	 * Provider
	 */
	private IProvider provider;

	/**
	 * Constructor
	 * @param pProvider provider
	 */
	public ProviderWrapper(IProvider pProvider) {
		provider = pProvider;
	}

	@Override
	public byte[] transceive(byte[] pCommand) throws CommunicationException {
		byte[] ret = provider.transceive(pCommand);
		// If LE is not correct
		if (ResponseUtils.isEquals(ret, SwEnum.SW_6C)) {
			pCommand[pCommand.length - 1] = ret[ret.length - 1];
			ret = provider.transceive(pCommand);
		} else if (ResponseUtils.isEquals(ret, SwEnum.SW_61)) { // Perform get response command
			ret = provider.transceive(new CommandApdu(CommandEnum.GET_RESPONSE, null, ret[ret.length - 1]).toBytes());
		}
		return ret;
	}

	@Override
	public byte[] getAt() {
		return provider.getAt();
	}

}