public byte[] decrypt(byte[] data)
throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException,
NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException, IOException,
InvalidAlgorithmParameterException {
Cipher cipher = getCipherInstance();
if (JCryptoHelper.isNecessaryIvBytes(this.jcrypto.getAlgorithm())) {
IvParameterSpec ivParameterSpec = new IvParameterSpec(JCryptoHelper.DEFAULT_IV_BYTES);
cipher.init(
Cipher.DECRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()),
ivParameterSpec);
} else {
cipher.init(
Cipher.DECRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()));
}
byte[] bData = null;
if (jcrypto.isApplyBase64()) {
// byte[] temp = new sun.misc.BASE64Decoder().decodeBuffer(new String( data));
byte[] temp = Base64.decodeBase64(data);
bData = temp;
} else {
bData = data;
}
return cipher.doFinal(bData);
}
public void encrypt(InputStream in, OutputStream out)
throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, IOException,
BadPaddingException, InvalidKeySpecException, InvalidAlgorithmParameterException {
Cipher cipher = Cipher.getInstance(jcrypto.getAlgorithm());
if (JCryptoHelper.isNecessaryIvBytes(this.jcrypto.getAlgorithm())) {
IvParameterSpec ivParameterSpec = new IvParameterSpec(JCryptoHelper.DEFAULT_IV_BYTES);
cipher.init(
Cipher.ENCRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()),
ivParameterSpec);
} else {
cipher.init(
Cipher.ENCRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()));
}
CipherOutputStream cos = new CipherOutputStream(out, cipher);
byte[] buffer = new byte[2048];
int bytesRead;
while ((bytesRead = in.read(buffer)) != -1) {
cos.write(buffer, 0, bytesRead);
cos.flush();
}
cos.close();
java.util.Arrays.fill(buffer, (byte) 0);
}
public byte[] encrypt(byte[] data)
throws NoSuchAlgorithmException, InvalidKeyException, NoSuchPaddingException, IOException,
InvalidKeySpecException, IllegalBlockSizeException, BadPaddingException,
InvalidAlgorithmParameterException {
Cipher cipher = getCipherInstance();
if (JCryptoHelper.isNecessaryIvBytes(this.jcrypto.getAlgorithm())) {
IvParameterSpec ivParameterSpec = new IvParameterSpec(JCryptoHelper.DEFAULT_IV_BYTES);
cipher.init(
Cipher.ENCRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()),
ivParameterSpec);
} else {
cipher.init(
Cipher.ENCRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()));
}
if (jcrypto.isApplyBase64()) {
// sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();
// return encoder.encode(cipher.doFinal(data)).getBytes();
return Base64.encodeBase64(cipher.doFinal(data));
} else {
return cipher.doFinal(data);
}
}
/**
* 입력받은 스트림을 close 여부를 전달 받아 복호화 처리를 한다.
*
* @param in 입력 스트림
* @param out 출력 스트림
* @param isStreamClose close 여부
* @throws NoSuchAlgorithmException 암호화 알고리즘을 찾을 수 없을때 예외 처리
* @throws InvalidKeyException 규칙에 맞지 않은 key 일때 예외 처리
* @throws IOException 입/출력 예외 처리
* @throws IllegalBlockSizeException 규칙에 맞지 않은 블럭사이즈 일때 예외 처리
* @throws NoSuchPaddingException 패딩 정보를 찾을 수 없을때 예외 처리
* @throws BadPaddingException 잘못된 패딩 일때 예외처리
* @throws InvalidKeySpecException 규칙에 맞지 않은 keySpec 일때 예외 처리
* @throws InvalidAlgorithmParameterException 유효하지 않은 알고리즘 파라미터 일때 예외처리
*/
private void decrypt(InputStream in, OutputStream out, boolean isStreamClose)
throws NoSuchAlgorithmException, InvalidKeyException, IOException, IllegalBlockSizeException,
NoSuchPaddingException, BadPaddingException, InvalidKeySpecException,
InvalidAlgorithmParameterException {
Cipher cipher = Cipher.getInstance(jcrypto.getAlgorithm());
if (JCryptoHelper.isNecessaryIvBytes(this.jcrypto.getAlgorithm())) {
IvParameterSpec ivParameterSpec = new IvParameterSpec(JCryptoHelper.DEFAULT_IV_BYTES);
cipher.init(
Cipher.DECRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()),
ivParameterSpec);
} else {
cipher.init(
Cipher.DECRYPT_MODE,
generateKey(
JCryptoHelper.getKeyAlgorithm(this.jcrypto.getAlgorithm()),
this.jcrypto.getAlgorithm(),
this.jcrypto.getKeyBytes()));
}
byte[] buffer = new byte[2048];
int bytesRead;
while ((bytesRead = in.read(buffer)) != -1) {
out.write(cipher.update(buffer, 0, bytesRead));
}
out.write(cipher.doFinal());
out.flush();
if (isStreamClose) {
in.close();
out.close();
}
}