package eu.siacs.conversations.xmpp.jingle; 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.CipherOutputStream; import javax.crypto.CipherInputStream; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.IvParameterSpec; import android.util.Log; public abstract class JingleTransport { public abstract void connect(final OnTransportConnected callback); public abstract void receive(final JingleFile file, final OnFileTransmissionStatusChanged callback); public abstract void send(final JingleFile file, final OnFileTransmissionStatusChanged callback); private byte[] iv = {0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0xf}; protected InputStream getInputStream(JingleFile file) throws FileNotFoundException { if (file.getKey() == null) { return new FileInputStream(file); } else { try { IvParameterSpec ips = new IvParameterSpec(iv); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, file.getKey(),ips); Log.d("xmppService","opening encrypted input stream"); return new CipherInputStream(new FileInputStream(file), cipher); } catch (NoSuchAlgorithmException e) { Log.d("xmppService","no such algo: "+e.getMessage()); return null; } catch (NoSuchPaddingException e) { Log.d("xmppService","no such padding: "+e.getMessage()); return null; } catch (InvalidKeyException e) { Log.d("xmppService","invalid key: "+e.getMessage()); return null; } catch (InvalidAlgorithmParameterException e) { Log.d("xmppService","invavid iv:"+e.getMessage()); return null; } } } protected OutputStream getOutputStream(JingleFile file) throws FileNotFoundException { if (file.getKey() == null) { return new FileOutputStream(file); } else { try { IvParameterSpec ips = new IvParameterSpec(iv); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, file.getKey(),ips); Log.d("xmppService","opening encrypted output stream"); return new CipherOutputStream(new FileOutputStream(file), cipher); } catch (NoSuchAlgorithmException e) { Log.d("xmppService","no such algo: "+e.getMessage()); return null; } catch (NoSuchPaddingException e) { Log.d("xmppService","no such padding: "+e.getMessage()); return null; } catch (InvalidKeyException e) { Log.d("xmppService","invalid key: "+e.getMessage()); return null; } catch (InvalidAlgorithmParameterException e) { Log.d("xmppService","invavid iv:"+e.getMessage()); return null; } } } }