package de.pixart.messenger.services; import android.content.Context; import android.os.PowerManager; import android.os.SystemClock; import android.util.Log; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.security.InvalidAlgorithmParameterException; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.util.concurrent.atomic.AtomicLong; import javax.crypto.Cipher; import javax.crypto.CipherInputStream; import javax.crypto.CipherOutputStream; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import de.pixart.messenger.Config; import de.pixart.messenger.R; import de.pixart.messenger.entities.DownloadableFile; import de.pixart.messenger.utils.Compatibility; 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; } public static InputStream upgrade(DownloadableFile file, InputStream is, boolean gcm) throws InvalidAlgorithmParameterException, NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, NoSuchProviderException { if (file.getKey() != null && file.getIv() != null) { if (gcm) { final Cipher cipher = Compatibility.twentyEight() ? Cipher.getInstance(CIPHERMODE) : Cipher.getInstance(CIPHERMODE, PROVIDER); SecretKeySpec keySpec = new SecretKeySpec(file.getKey(), KEYTYPE); IvParameterSpec ivSpec = new IvParameterSpec(file.getIv()); cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec); return new CipherInputStream(is, cipher); } else { IvParameterSpec ips = new IvParameterSpec(file.getIv()); final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(file.getKey(), KEYTYPE), ips); return new CipherInputStream(is, cipher); } } else { return is; } } public static OutputStream createAppendedOutputStream(DownloadableFile file) { return createOutputStream(file, false, true); } public static OutputStream createOutputStream(DownloadableFile file, boolean gcm) { return createOutputStream(file, gcm, false); } private static OutputStream createOutputStream(DownloadableFile file, boolean gcm, boolean append) { FileOutputStream os; try { os = new FileOutputStream(file, append); if (file.getKey() == null) { return os; } } catch (FileNotFoundException e) { Log.d(Config.LOGTAG, "unable to create output stream", e); return null; } try { if (gcm) { final Cipher cipher = Compatibility.twentyEight() ? Cipher.getInstance(CIPHERMODE) : Cipher.getInstance(CIPHERMODE, PROVIDER); 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); } else { IvParameterSpec ips = new IvParameterSpec(file.getIv()); final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(file.getKey(), KEYTYPE), ips); return new CipherOutputStream(os, cipher); } } catch (Exception e) { Log.d(Config.LOGTAG, "unable to create cipher output stream", e); return null; } } public XmppConnectionService getXmppConnectionService() { return this.mXmppConnectionService; } public long getAutoAcceptFileSize() { long defaultValue_wifi = this.getXmppConnectionService().getResources().getInteger(R.integer.auto_accept_filesize_wifi); long defaultValue_mobile = this.getXmppConnectionService().getResources().getInteger(R.integer.auto_accept_filesize_mobile); long defaultValue_roaming = this.getXmppConnectionService().getResources().getInteger(R.integer.auto_accept_filesize_roaming); String config = "0"; if (mXmppConnectionService.isWIFI()) { config = this.mXmppConnectionService.getPreferences().getString( "auto_accept_file_size_wifi", String.valueOf(defaultValue_wifi)); } else if (mXmppConnectionService.isMobile()) { config = this.mXmppConnectionService.getPreferences().getString( "auto_accept_file_size_mobile", String.valueOf(defaultValue_mobile)); } else if (mXmppConnectionService.isMobileRoaming()) { config = this.mXmppConnectionService.getPreferences().getString( "auto_accept_file_size_roaming", String.valueOf(defaultValue_roaming)); } try { return Long.parseLong(config); } catch (NumberFormatException e) { return defaultValue_mobile; } } 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); } }