78 lines
2.8 KiB
Java
78 lines
2.8 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 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, final OnFileTransmissionStatusChanged callback);
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public abstract void send(final JingleFile file, final OnFileTransmissionStatusChanged callback);
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private byte[] iv = {0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0xf};
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protected InputStream getInputStream(JingleFile file) 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("xmppService","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("xmppService","no such algo: "+e.getMessage());
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return null;
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} catch (NoSuchPaddingException e) {
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Log.d("xmppService","no such padding: "+e.getMessage());
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return null;
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} catch (InvalidKeyException e) {
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Log.d("xmppService","invalid key: "+e.getMessage());
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return null;
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} catch (InvalidAlgorithmParameterException e) {
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Log.d("xmppService","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) 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("xmppService","opening encrypted output stream");
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return new CipherOutputStream(new FileOutputStream(file), cipher);
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} catch (NoSuchAlgorithmException e) {
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Log.d("xmppService","no such algo: "+e.getMessage());
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return null;
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} catch (NoSuchPaddingException e) {
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Log.d("xmppService","no such padding: "+e.getMessage());
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return null;
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} catch (InvalidKeyException e) {
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Log.d("xmppService","invalid key: "+e.getMessage());
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return null;
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} catch (InvalidAlgorithmParameterException e) {
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Log.d("xmppService","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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