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package eu.siacs.conversations.xmpp.jingle;
import android.util.Log;
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 abstract class JingleTransport {
public abstract void connect(final OnTransportConnected callback);
public abstract void receive(final DownloadableFile file,
final OnFileTransmissionStatusChanged callback);
public abstract void send(final DownloadableFile file,
final OnFileTransmissionStatusChanged callback);
public abstract void disconnect();
protected InputStream createInputStream(DownloadableFile file) {
FileInputStream is;
try {
is = new FileInputStream(file);
if (file.getKey() == null) {
return is;
}
} catch (FileNotFoundException e) {
return null;
}
try {
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");
return new CipherInputStream(is, cipher);
} catch (InvalidKeyException e) {
return null;
} catch (NoSuchAlgorithmException e) {
return null;
} catch (NoSuchPaddingException e) {
return null;
} catch (InvalidAlgorithmParameterException e) {
return null;
}
}
protected OutputStream createOutputStream(DownloadableFile file) {
FileOutputStream os;
try {
os = new FileOutputStream(file);
if (file.getKey() == null) {
return os;
}
} catch (FileNotFoundException e) {
return null;
}
try {
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;
}
}
}
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