/*
* This file is part of NixNote
* Copyright 2009 Randy Baumgarte
*
* This file may be licensed under the terms of of the
* GNU General Public License Version 2 (the ``GPL'').
*
* Software distributed under the License is distributed
* on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
* express or implied. See the GPL for the specific language
* governing rights and limitations.
*
* You should have received a copy of the GPL along with this
* program. If not, go to http://www.gnu.org/licenses/gpl.html
* or write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
package cx.fbn.nevernote.utilities;
//RSA - Rivest, Shamir, & Adleman
import java.io.InputStream;
import java.io.OutputStream;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
public class AESEncrypter
{
private Cipher cipher;
private String string;
private final SecretKeySpec skeySpec;
private final AlgorithmParameterSpec paramSpec;
public AESEncrypter()
{
String key = "x331aq5wDQ8xO81v";
skeySpec = new SecretKeySpec(key.getBytes(), "AES");
string = new String("");
// Create an 8-byte initialization vector
byte[] iv = new byte[]
{
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
};
paramSpec = new IvParameterSpec(iv);
try
{
cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
}
catch (Exception e)
{
e.printStackTrace();
}
}
public void setString(String s) {
string = s;
}
public String getString() {
return string;
}
public void encrypt(OutputStream out)
{
// CBC requires an initialization vector
try {
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, paramSpec);
out = new CipherOutputStream(out, cipher);
// String u = new String(userid +" " +password);
StringBuffer u = new StringBuffer(1024);
u.append(string);
for (int i=u.length(); i<128; i++)
u.append('\0');
out.write(u.toString().getBytes());
out.close();
}
catch (java.io.IOException e)
{
System.out.println("Encrypt i/o exception");
} catch (InvalidKeyException e1) {
e1.printStackTrace();
} catch (InvalidAlgorithmParameterException e1) {
e1.printStackTrace();
}
}
public void decrypt(InputStream in)
{
byte[] buf = new byte[1024];
// CBC requires an initialization vector
try {
cipher.init(Cipher.DECRYPT_MODE, skeySpec, paramSpec);
// Bytes read from in will be decrypted
in = new CipherInputStream(in, cipher);
if (in.read(buf) >= 0)
{
string = new String(buf);
}
in.close();
} catch (java.io.IOException e) {
return;
} catch (InvalidKeyException e1) {
return;
} catch (InvalidAlgorithmParameterException e1) {
return;
}
}
}