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