anotherim/src/main/java/eu/siacs/conversations/services/AbstractConnectionManager.java

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package eu.siacs.conversations.services;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.PowerManager;
import android.os.SystemClock;
import android.util.Pair;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.concurrent.atomic.AtomicLong;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.DownloadableFile;
import eu.siacs.conversations.utils.Compatibility;
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public class AbstractConnectionManager {
private static final String KEYTYPE = "AES";
private static final String CIPHERMODE = "AES/GCM/NoPadding";
private static final String PROVIDER = "BC";
private static final int UI_REFRESH_THRESHOLD = 250;
private static final AtomicLong LAST_UI_UPDATE_CALL = new AtomicLong(0);
protected XmppConnectionService mXmppConnectionService;
public AbstractConnectionManager(XmppConnectionService service) {
this.mXmppConnectionService = service;
}
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public static Pair<InputStream, Integer> createInputStream(DownloadableFile file) throws FileNotFoundException {
FileInputStream is;
int size;
is = new FileInputStream(file);
size = (int) file.getSize();
if (file.getKey() == null) {
return new Pair<>(is, size);
}
try {
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Cipher cipher = Cipher.getInstance(CIPHERMODE);
SecretKeySpec keySpec = new SecretKeySpec(file.getKey(), KEYTYPE);
IvParameterSpec ivSpec = new IvParameterSpec(file.getIv());
cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
return new Pair<>(new CipherInputStream(is, cipher), cipher.getOutputSize(size));
} catch (Exception e) {
throw new AssertionError(e);
}
}
public static OutputStream createAppendedOutputStream(DownloadableFile file) {
return createOutputStream(file, true);
}
public static OutputStream createOutputStream(DownloadableFile file) {
return createOutputStream(file, false);
}
private static OutputStream createOutputStream(DownloadableFile file, boolean append) {
FileOutputStream os;
try {
os = new FileOutputStream(file, append);
if (file.getKey() == null) {
return os;
}
} catch (FileNotFoundException e) {
return null;
}
try {
Cipher cipher = Cipher.getInstance(CIPHERMODE);
SecretKeySpec keySpec = new SecretKeySpec(file.getKey(), KEYTYPE);
IvParameterSpec ivSpec = new IvParameterSpec(file.getIv());
cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
return new CipherOutputStream(os, cipher);
} catch (Exception e) {
return null;
}
}
public XmppConnectionService getXmppConnectionService() {
return this.mXmppConnectionService;
}
public long getAutoAcceptFileSize() {
return this.mXmppConnectionService.getLongPreference("auto_accept_file_size", R.integer.auto_accept_filesize);
}
public boolean hasStoragePermission() {
return Compatibility.hasStoragePermission(mXmppConnectionService);
}
public void updateConversationUi(boolean force) {
synchronized (LAST_UI_UPDATE_CALL) {
if (force || SystemClock.elapsedRealtime() - LAST_UI_UPDATE_CALL.get() >= UI_REFRESH_THRESHOLD) {
LAST_UI_UPDATE_CALL.set(SystemClock.elapsedRealtime());
mXmppConnectionService.updateConversationUi();
}
}
}
public PowerManager.WakeLock createWakeLock(String name) {
PowerManager powerManager = (PowerManager) mXmppConnectionService.getSystemService(Context.POWER_SERVICE);
return powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, name);
}
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}