diff options
Diffstat (limited to 'src/main/java/eu/siacs/conversations/services/AbstractConnectionManager.java')
-rw-r--r-- | src/main/java/eu/siacs/conversations/services/AbstractConnectionManager.java | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/main/java/eu/siacs/conversations/services/AbstractConnectionManager.java b/src/main/java/eu/siacs/conversations/services/AbstractConnectionManager.java index 676a09c97..5def05dd4 100644 --- a/src/main/java/eu/siacs/conversations/services/AbstractConnectionManager.java +++ b/src/main/java/eu/siacs/conversations/services/AbstractConnectionManager.java @@ -1,5 +1,35 @@ package eu.siacs.conversations.services; +import android.content.Context; +import android.os.PowerManager; +import android.util.Log; +import android.util.Pair; + +import org.bouncycastle.crypto.engines.AESEngine; +import org.bouncycastle.crypto.modes.AEADBlockCipher; +import org.bouncycastle.crypto.modes.GCMBlockCipher; +import org.bouncycastle.crypto.params.AEADParameters; +import org.bouncycastle.crypto.params.KeyParameter; + +import java.io.FileInputStream; +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 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 eu.siacs.conversations.Config; +import eu.siacs.conversations.entities.DownloadableFile; + public class AbstractConnectionManager { protected XmppConnectionService mXmppConnectionService; @@ -20,4 +50,75 @@ public class AbstractConnectionManager { return 524288; } } + + public static Pair<InputStream,Integer> createInputStream(DownloadableFile file, boolean gcm) throws FileNotFoundException { + FileInputStream is; + int size; + is = new FileInputStream(file); + size = (int) file.getSize(); + if (file.getKey() == null) { + return new Pair<InputStream,Integer>(is,size); + } + try { + if (gcm) { + AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine()); + cipher.init(true, new AEADParameters(new KeyParameter(file.getKey()), 128, file.getIv())); + InputStream cis = new org.bouncycastle.crypto.io.CipherInputStream(is, cipher); + return new Pair<>(cis, cipher.getOutputSize(size)); + } else { + IvParameterSpec ips = new IvParameterSpec(file.getIv()); + Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); + cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(file.getKey(), "AES"), ips); + Log.d(Config.LOGTAG, "opening encrypted input stream"); + final int s = Config.REPORT_WRONG_FILESIZE_IN_OTR_JINGLE ? size : (size / 16 + 1) * 16; + return new Pair<InputStream,Integer>(new CipherInputStream(is, cipher),s); + } + } catch (InvalidKeyException e) { + return null; + } catch (NoSuchAlgorithmException e) { + return null; + } catch (NoSuchPaddingException e) { + return null; + } catch (InvalidAlgorithmParameterException e) { + return null; + } + } + + public static OutputStream createOutputStream(DownloadableFile file, boolean gcm) { + FileOutputStream os; + try { + os = new FileOutputStream(file); + if (file.getKey() == null) { + return os; + } + } catch (FileNotFoundException e) { + return null; + } + try { + if (gcm) { + AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine()); + cipher.init(false, new AEADParameters(new KeyParameter(file.getKey()), 128, file.getIv())); + return new org.bouncycastle.crypto.io.CipherOutputStream(os, cipher); + } else { + IvParameterSpec ips = new IvParameterSpec(file.getIv()); + Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); + cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(file.getKey(), "AES"), ips); + Log.d(Config.LOGTAG, "opening encrypted output stream"); + return new CipherOutputStream(os, cipher); + } + } catch (InvalidKeyException e) { + return null; + } catch (NoSuchAlgorithmException e) { + return null; + } catch (NoSuchPaddingException e) { + return null; + } catch (InvalidAlgorithmParameterException e) { + return null; + } + } + + public PowerManager.WakeLock createWakeLock(String name) { + PowerManager powerManager = (PowerManager) mXmppConnectionService.getSystemService(Context.POWER_SERVICE); + return powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,name); + } } |