* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
- *
+ *
* http://www.apache.org/licenses/LICENSE-2.0
- *
+ *
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* AES Class wraps Cipher AES, 128
* NOTE: While not explicitly stated in JavaDocs, Ciphers AND SecretKeySpecs are NOT ThreadSafe
* Ciphers take time to create, therefore, we have pooled them.
- *
+ *
* @author Jonathan
*
*/
public class AES implements Encryption {
- public static final String AES = AES.class.getSimpleName();
- public static final int AES_KEY_SIZE = 128; // 256 isn't supported on all JDKs.
-
- private SecretKeySpec aeskeySpec;
+ public static final String AES = AES.class.getSimpleName();
+ public static final int AES_KEY_SIZE = 128; // 256 isn't supported on all JDKs.
+
+ private SecretKeySpec aeskeySpec;
+
+ public static SecretKey newKey() throws NoSuchAlgorithmException {
+ KeyGenerator kgen = KeyGenerator.getInstance(AES);
+ kgen.init(AES_KEY_SIZE);
+ return kgen.generateKey();
+ }
+
+ public AES(byte[] aeskey, int offset, int len){
+ aeskeySpec = new SecretKeySpec(aeskey,offset,len,AES);
+ }
+
+ public byte[] encrypt(byte[] in) throws CadiException {
+ try {
+ Cipher c = Cipher.getInstance(AES);
+ c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
+ return c.doFinal(in);
+ } catch (InvalidKeyException | IllegalBlockSizeException | BadPaddingException | NoSuchAlgorithmException | NoSuchPaddingException e) {
+ throw new CadiException(e);
+ }
+ }
+
+ public byte[] decrypt(byte[] in) throws CadiException {
+ try {
+ Cipher c = Cipher.getInstance(AES);
+ c.init(Cipher.DECRYPT_MODE,aeskeySpec);
+ return c.doFinal(in);
+ } catch (InvalidKeyException | IllegalBlockSizeException | BadPaddingException | NoSuchAlgorithmException | NoSuchPaddingException e) {
+ throw new CadiException(e);
+ }
+ }
- public static SecretKey newKey() throws NoSuchAlgorithmException {
- KeyGenerator kgen = KeyGenerator.getInstance(AES);
- kgen.init(AES_KEY_SIZE);
- return kgen.generateKey();
- }
+ public void save(File keyfile) throws IOException {
+ FileOutputStream fis = new FileOutputStream(keyfile);
+ try {
+ fis.write(aeskeySpec.getEncoded());
+ } finally {
+ fis.close();
+ }
+ Chmod.to400.chmod(keyfile);
+ }
- public AES(byte[] aeskey, int offset, int len) throws IOException, NoSuchAlgorithmException, NoSuchPaddingException {
- aeskeySpec = new SecretKeySpec(aeskey,offset,len,AES);
- }
-
- public byte[] encrypt(byte[] in) throws CadiException {
- try {
- Cipher c = Cipher.getInstance(AES);
- c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
- return c.doFinal(in);
- } catch (InvalidKeyException | IllegalBlockSizeException | BadPaddingException | NoSuchAlgorithmException | NoSuchPaddingException e) {
- throw new CadiException(e);
- }
- }
-
- public byte[] decrypt(byte[] in) throws CadiException {
- try {
- Cipher c = Cipher.getInstance(AES);
- c.init(Cipher.DECRYPT_MODE,aeskeySpec);
- return c.doFinal(in);
- } catch (InvalidKeyException | IllegalBlockSizeException | BadPaddingException | NoSuchAlgorithmException | NoSuchPaddingException e) {
- throw new CadiException(e);
- }
- }
-
- public void save(File keyfile) throws IOException {
- FileOutputStream fis = new FileOutputStream(keyfile);
- try {
- fis.write(aeskeySpec.getEncoded());
- } finally {
- fis.close();
- }
- Chmod.to400.chmod(keyfile);
- }
+ public CipherOutputStream outputStream(OutputStream os, boolean encrypt) {
+ try {
+ Cipher c = Cipher.getInstance(AES);
+ if (encrypt) {
+ c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
+ } else {
+ c.init(Cipher.DECRYPT_MODE,aeskeySpec);
+ }
+ return new CipherOutputStream(os,c);
+ } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException e) {
+ // Cannot add Exception to this API. throw Runtime
+ System.err.println("Error creating Aes CipherOutputStream");
+ return null; // should never get here.
+ }
+ }
- public CipherOutputStream outputStream(OutputStream os, boolean encrypt) {
- try {
- Cipher c = Cipher.getInstance(AES);
- if(encrypt) {
- c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
- } else {
- c.init(Cipher.DECRYPT_MODE,aeskeySpec);
- }
- return new CipherOutputStream(os,c);
- } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException e) {
- // Cannot add Exception to this API. throw Runtime
- System.err.println("Error creating Aes CipherOutputStream");
- return null; // should never get here.
- }
- }
-
- public CipherInputStream inputStream(InputStream is, boolean encrypt) {
- try {
- Cipher c = Cipher.getInstance(AES);
- if(encrypt) {
- c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
- } else {
- c.init(Cipher.DECRYPT_MODE,aeskeySpec);
- }
- return new CipherInputStream(is,c);
- } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException e) {
- // Cannot add Exception to this API. throw Runtime
- System.err.println("Error creating Aes CipherInputStream");
- return null; // should never get here.
- }
- }
+ public CipherInputStream inputStream(InputStream is, boolean encrypt) {
+ try {
+ Cipher c = Cipher.getInstance(AES);
+ if (encrypt) {
+ c.init(Cipher.ENCRYPT_MODE,aeskeySpec);
+ } else {
+ c.init(Cipher.DECRYPT_MODE,aeskeySpec);
+ }
+ return new CipherInputStream(is,c);
+ } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException e) {
+ // Cannot add Exception to this API. throw Runtime
+ System.err.println("Error creating Aes CipherInputStream");
+ return null; // should never get here.
+ }
+ }
}