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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
/*
* Copyright (c) 2015-2017, The Linux Foundation.
*/
/*
* Contributed by: Giesecke & Devrient GmbH.
*/
package android.se.omapi;
import android.annotation.NonNull;
import android.os.RemoteException;
import android.os.ServiceSpecificException;
import android.util.Log;
import java.io.IOException;
/**
* Instances of this class represent Secure Element Readers supported to this
* device. These Readers can be physical devices or virtual devices. They can be
* removable or not. They can contain Secure Element that can or cannot be
* removed.
*
* @see <a href="http://globalplatform.org">GlobalPlatform Open Mobile API</a>
*/
public final class Reader {
private static final String TAG = "OMAPI.Reader";
private final String mName;
private final SEService mService;
private ISecureElementReader mReader;
private final Object mLock = new Object();
Reader(@NonNull SEService service, @NonNull String name, @NonNull ISecureElementReader reader) {
if (reader == null || service == null || name == null) {
throw new IllegalArgumentException("Parameters cannot be null");
}
mName = name;
mService = service;
mReader = reader;
}
/**
* Return the name of this reader.
* <ul>
* <li>If this reader is a SIM reader, then its name must be "SIM[Slot]".</li>
* <li>If the reader is a SD or micro SD reader, then its name must be "SD[Slot]"</li>
* <li>If the reader is a embedded SE reader, then its name must be "eSE[Slot]"</li>
* </ul>
* Slot is a decimal number without leading zeros. The Numbering must start with 1
* (e.g. SIM1, SIM2, ... or SD1, SD2, ... or eSE1, eSE2, ...).
* The slot number “1” for a reader is optional
* (SIM and SIM1 are both valid for the first SIM-reader,
* but if there are two readers then the second reader must be named SIM2).
* This applies also for other SD or SE readers.
*
* @return the reader name, as a String.
*/
public @NonNull String getName() {
return mName;
}
/**
* Connects to a Secure Element in this reader. <br>
* This method prepares (initialises) the Secure Element for communication
* before the Session object is returned (e.g. powers the Secure Element by
* ICC ON if its not already on). There might be multiple sessions opened at
* the same time on the same reader. The system ensures the interleaving of
* APDUs between the respective sessions.
*
* @throws IOException if something went wrong with the communicating to the
* Secure Element or the reader.
* @return a Session object to be used to create Channels.
*/
public @NonNull Session openSession() throws IOException {
if (!mService.isConnected()) {
throw new IllegalStateException("service is not connected");
}
synchronized (mLock) {
ISecureElementSession session;
try {
session = mReader.openSession();
} catch (ServiceSpecificException e) {
throw new IOException(e.getMessage());
} catch (RemoteException e) {
throw new IllegalStateException(e.getMessage());
}
if (session == null) {
throw new IOException("service session is null.");
}
return new Session(mService, session, this);
}
}
/**
* Check if a Secure Element is present in this reader.
*
* @throws IllegalStateException if the service is not connected
* @return <code>true</code> if the SE is present, <code>false</code> otherwise.
*/
public boolean isSecureElementPresent() {
if (!mService.isConnected()) {
throw new IllegalStateException("service is not connected");
}
try {
return mReader.isSecureElementPresent();
} catch (RemoteException e) {
throw new IllegalStateException("Error in isSecureElementPresent()");
}
}
/**
* Return the Secure Element service this reader is bound to.
*
* @return the SEService object.
*/
public @NonNull SEService getSEService() {
return mService;
}
/**
* Close all the sessions opened on this reader.
* All the channels opened by all these sessions will be closed.
*/
public void closeSessions() {
if (!mService.isConnected()) {
Log.e(TAG, "service is not connected");
return;
}
synchronized (mLock) {
try {
mReader.closeSessions();
} catch (RemoteException ignore) { }
}
}
}
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