remove try/catch block and add throw clause
This commit is contained in:
sharifi
parent
c57644617d
commit
5274cf403f
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@ -1,8 +1,5 @@
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package com.baeldung.aes;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import javax.crypto.Cipher;
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import javax.crypto.IllegalBlockSizeException;
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import javax.crypto.NoSuchPaddingException;
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@ -28,36 +25,25 @@ import java.security.spec.KeySpec;
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import java.util.Base64;
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public class AESUtil {
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private static final Logger LOGGER = LoggerFactory.getLogger(AESUtil.class);
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public static String encrypt(String algorithm, String input, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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byte[] cipherText = cipher.doFinal(input.getBytes());
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return Base64.getEncoder()
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.encodeToString(cipherText);
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} catch (NoSuchAlgorithmException | NoSuchPaddingException |
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InvalidKeyException | InvalidAlgorithmParameterException |
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IllegalBlockSizeException | BadPaddingException exp) {
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LOGGER.error(exp.getMessage());
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}
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return null;
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public static String encrypt(String algorithm, String input, SecretKey key, IvParameterSpec iv)
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throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
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InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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byte[] cipherText = cipher.doFinal(input.getBytes());
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return Base64.getEncoder()
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.encodeToString(cipherText);
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}
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public static String decrypt(String algorithm, String cipherText, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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byte[] plainText = cipher.doFinal(Base64.getDecoder()
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.decode(cipherText));
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return new String(plainText);
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} catch (NoSuchAlgorithmException | NoSuchPaddingException |
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InvalidKeyException | InvalidAlgorithmParameterException |
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IllegalBlockSizeException | BadPaddingException exp) {
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LOGGER.error(exp.getMessage());
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}
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return null;
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public static String decrypt(String algorithm, String cipherText, SecretKey key, IvParameterSpec iv)
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throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
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InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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byte[] plainText = cipher.doFinal(Base64.getDecoder()
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.decode(cipherText));
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return new String(plainText);
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}
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public static SecretKey generateKey(int n) throws NoSuchAlgorithmException {
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@ -83,122 +69,88 @@ public class AESUtil {
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}
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public static void encryptFile(String algorithm, SecretKey key, IvParameterSpec iv,
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File inputFile, File outputFile) throws IOException {
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FileInputStream inputStream = null;
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FileOutputStream outputStream = null;
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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inputStream = new FileInputStream(inputFile);
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outputStream = new FileOutputStream(outputFile);
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byte[] buffer = new byte[64];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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byte[] output = cipher.update(buffer, 0, bytesRead);
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if (output != null) {
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outputStream.write(output);
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}
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}
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byte[] outputBytes = cipher.doFinal();
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if (outputBytes != null) {
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outputStream.write(outputBytes);
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}
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} catch (InvalidAlgorithmParameterException | NoSuchAlgorithmException |
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NoSuchPaddingException | BadPaddingException |
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IllegalBlockSizeException | InvalidKeyException exp) {
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LOGGER.error(exp.getMessage());
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} finally {
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inputStream.close();
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outputStream.close();
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}
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}
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public static void decryptFile(String algorithm, SecretKey key, IvParameterSpec iv,
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File encryptedFile, File decryptedFile) throws IOException {
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FileInputStream inputStream = null;
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FileOutputStream outputStream = null;
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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inputStream = new FileInputStream(encryptedFile);
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outputStream = new FileOutputStream(decryptedFile);
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byte[] buffer = new byte[64];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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byte[] output = cipher.update(buffer, 0, bytesRead);
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if (output != null) {
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outputStream.write(output);
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}
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}
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byte[] output = cipher.doFinal();
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File inputFile, File outputFile) throws IOException, NoSuchPaddingException,
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NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException,
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BadPaddingException, IllegalBlockSizeException {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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FileInputStream inputStream = new FileInputStream(inputFile);
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FileOutputStream outputStream = new FileOutputStream(outputFile);
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byte[] buffer = new byte[64];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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byte[] output = cipher.update(buffer, 0, bytesRead);
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if (output != null) {
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outputStream.write(output);
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}
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} catch (InvalidAlgorithmParameterException | NoSuchAlgorithmException |
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NoSuchPaddingException | BadPaddingException |
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IllegalBlockSizeException | InvalidKeyException exp) {
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LOGGER.error(exp.getMessage());
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} finally {
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inputStream.close();
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outputStream.close();
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}
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byte[] outputBytes = cipher.doFinal();
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if (outputBytes != null) {
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outputStream.write(outputBytes);
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}
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inputStream.close();
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outputStream.close();
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}
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public static SealedObject encryptObject(String algorithm, Serializable object, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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SealedObject sealedObject = new SealedObject(object, cipher);
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return sealedObject;
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} catch (NoSuchAlgorithmException | NoSuchPaddingException |
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InvalidKeyException | InvalidAlgorithmParameterException |
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IOException | IllegalBlockSizeException exp) {
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LOGGER.error(exp.getMessage());
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public static void decryptFile(String algorithm, SecretKey key, IvParameterSpec iv,
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File encryptedFile, File decryptedFile) throws IOException, NoSuchPaddingException,
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NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException,
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BadPaddingException, IllegalBlockSizeException {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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FileInputStream inputStream = new FileInputStream(encryptedFile);
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FileOutputStream outputStream = new FileOutputStream(decryptedFile);
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byte[] buffer = new byte[64];
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int bytesRead;
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while ((bytesRead = inputStream.read(buffer)) != -1) {
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byte[] output = cipher.update(buffer, 0, bytesRead);
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if (output != null) {
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outputStream.write(output);
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}
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}
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return null;
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byte[] output = cipher.doFinal();
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if (output != null) {
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outputStream.write(output);
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}
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inputStream.close();
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outputStream.close();
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}
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public static Serializable decryptObject(String algorithm, SealedObject sealedObject,
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SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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Serializable unsealObject = (Serializable) sealedObject.getObject(cipher);
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return unsealObject;
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} catch (NoSuchAlgorithmException | NoSuchPaddingException |
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InvalidKeyException | InvalidAlgorithmParameterException |
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IOException | ClassNotFoundException | IllegalBlockSizeException | BadPaddingException exp) {
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LOGGER.error(exp.getMessage());
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}
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return null;
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public static SealedObject encryptObject(String algorithm, Serializable object, SecretKey key,
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IvParameterSpec iv) throws NoSuchPaddingException, NoSuchAlgorithmException,
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InvalidAlgorithmParameterException, InvalidKeyException, IOException, IllegalBlockSizeException {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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SealedObject sealedObject = new SealedObject(object, cipher);
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return sealedObject;
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}
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public static String encryptPasswordBased(String plainText, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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return Base64.getEncoder()
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.encodeToString(cipher.doFinal(plainText.getBytes()));
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} catch (NoSuchAlgorithmException | BadPaddingException |
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InvalidKeyException | InvalidAlgorithmParameterException |
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NoSuchPaddingException | IllegalBlockSizeException exp) {
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LOGGER.error(exp.getMessage());
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}
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return null;
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public static Serializable decryptObject(String algorithm, SealedObject sealedObject, SecretKey key,
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IvParameterSpec iv) throws NoSuchPaddingException, NoSuchAlgorithmException,
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InvalidAlgorithmParameterException, InvalidKeyException, ClassNotFoundException,
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BadPaddingException, IllegalBlockSizeException, IOException {
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Cipher cipher = Cipher.getInstance(algorithm);
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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Serializable unsealObject = (Serializable) sealedObject.getObject(cipher);
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return unsealObject;
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}
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public static String decryptPasswordBased(String cipherText, SecretKey key, IvParameterSpec iv) {
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try {
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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return new String(cipher.doFinal(Base64.getDecoder()
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.decode(cipherText)));
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} catch (NoSuchAlgorithmException | BadPaddingException |
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InvalidKeyException | InvalidAlgorithmParameterException |
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NoSuchPaddingException | IllegalBlockSizeException exp) {
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LOGGER.error(exp.getMessage());
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}
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return null;
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public static String encryptPasswordBased(String plainText, SecretKey key, IvParameterSpec iv)
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throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
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InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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cipher.init(Cipher.ENCRYPT_MODE, key, iv);
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return Base64.getEncoder()
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.encodeToString(cipher.doFinal(plainText.getBytes()));
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}
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public static String decryptPasswordBased(String cipherText, SecretKey key, IvParameterSpec iv)
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throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
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InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
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cipher.init(Cipher.DECRYPT_MODE, key, iv);
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return new String(cipher.doFinal(Base64.getDecoder()
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.decode(cipherText)));
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}
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}
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