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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 eu.siacs.conversations.Config;
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(Config.LOGTAG, "opening encrypted input stream");
return new CipherInputStream(new FileInputStream(file), cipher);
} catch (NoSuchAlgorithmException e) {
Log.d(Config.LOGTAG, "no such algo: " + e.getMessage());
return null;
} catch (NoSuchPaddingException e) {
Log.d(Config.LOGTAG, "no such padding: " + e.getMessage());
return null;
} catch (InvalidKeyException e) {
Log.d(Config.LOGTAG, "invalid key: " + e.getMessage());
return null;
} catch (InvalidAlgorithmParameterException e) {
Log.d(Config.LOGTAG, "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(Config.LOGTAG, "opening encrypted output stream");
return new CipherOutputStream(new FileOutputStream(file),
cipher);
} catch (NoSuchAlgorithmException e) {
Log.d(Config.LOGTAG, "no such algo: " + e.getMessage());
return null;
} catch (NoSuchPaddingException e) {
Log.d(Config.LOGTAG, "no such padding: " + e.getMessage());
return null;
} catch (InvalidKeyException e) {
Log.d(Config.LOGTAG, "invalid key: " + e.getMessage());
return null;
} catch (InvalidAlgorithmParameterException e) {
Log.d(Config.LOGTAG, "invavid iv:" + e.getMessage());
return null;
}
}
}
}
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