Example usage for javax.crypto Cipher doFinal

Introduction

In this page you can find the example usage for javax.crypto Cipher doFinal.

Prototype

public final byte[] doFinal(byte[] input) throws IllegalBlockSizeException, BadPaddingException

Source Link

Document

Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.

Usage

From source file:net.duckling.ddl.web.agent.util.AuthUtil.java

private static String decodeAuth(String auth) throws NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeyException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
    SecretKeySpec spec = new SecretKeySpec(getKey(), "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, spec);
    byte[] result = cipher.doFinal(Base64.decodeBase64(auth));
    return new String(result, "UTF-8");
}

From source file:aes_encryption.AES_Encryption.java

public static String decrypt(String strToDecrypt) {

    try {//w  ww  .  j  a  v  a 2  s  . c  o  m
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");

        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        setDecryptedString(new String(cipher.doFinal(Base64.decodeBase64(strToDecrypt))));

    } catch (Exception e) {

        System.out.println("Error while decrypting: " + e.toString());
    }
    return null;
}

From source file:Main.java

private static String encryptText(char[] plaintext, Cipher cipher) {
    byte[] plaintextBytes = charArrayToByteArray(plaintext);
    byte[] ciphertext = {};

    try {//from w ww .j a va2 s .  c  om
        ciphertext = cipher.doFinal(plaintextBytes);
    } catch (Exception e) {
        Log.d(LOG_TAG, "encryptText", e);
    }

    //turn into hex so storage as a string is possible (db)
    return toHexString(ciphertext);
}

From source file:com.thoughtworks.go.server.util.EncryptionHelper.java

public static String decryptUsingAES(SecretKey secretKey, String dataToDecrypt) throws NoSuchPaddingException,
        NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    Cipher aesCipher = Cipher.getInstance("AES");
    aesCipher.init(Cipher.DECRYPT_MODE, secretKey);
    byte[] bytePlainText = aesCipher.doFinal(Base64.getDecoder().decode(dataToDecrypt));
    return new String(bytePlainText);
}

From source file:br.com.zeros.tipsandtricks.cryto.EncryptionStrings.java

public static String decrypt(String encryptedValue) throws Exception {
    Key key = generateKey();// w w  w.  j a  v  a 2s.c o m
    Cipher c = Cipher.getInstance(ALGORITHM);
    c.init(Cipher.DECRYPT_MODE, key);
    byte[] decordedValue = new Base64().decode(encryptedValue);
    byte[] decValue = c.doFinal(decordedValue);//////////LINE 50
    String decryptedValue = new String(decValue);
    return decryptedValue;
}

From source file:com.thoughtworks.go.server.util.EncryptionHelper.java

public static String encryptUsingAES(SecretKey secretKey, String dataToEncrypt) throws NoSuchPaddingException,
        NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    Cipher aesCipher = Cipher.getInstance("AES");
    aesCipher.init(Cipher.ENCRYPT_MODE, secretKey);
    byte[] byteCipherText = aesCipher.doFinal(dataToEncrypt.getBytes());
    return Base64.getEncoder().encodeToString(byteCipherText);
}

From source file:com.vmware.bdd.security.EncryptionGuard.java

/**
 * Encrypt the clear text against given secret key.
 * //from ww w  .  jav  a  2  s.com
 * @param clearText
 *           the clear string
 * @return the encrypted string, or null if the clear string is null
 * @throws CommonException
 *            if input arguments is null
 */
public static String encode(String clearText) throws GeneralSecurityException, UnsupportedEncodingException {
    if (clearText == null) {
        return null;
    }

    Key key = GuardKeyStore.getEncryptionKey();
    String salt = SaltGenerator.genRandomString(SALT_SIZE);

    String inputText = salt + clearText; // add salt
    byte[] clearBytes = inputText.getBytes(UTF8_ENCODING);

    Cipher cipher = getCiperInternal(Cipher.ENCRYPT_MODE, key);
    byte[] encryptedBytes = cipher.doFinal(clearBytes);

    Base64 base64 = new Base64(0); // 0 - no chunking
    return salt + base64.encodeToString(encryptedBytes);
}

From source file:com.lingxiang2014.util.RSAUtils.java

public static byte[] decrypt(PrivateKey privateKey, byte[] data) {
    Assert.notNull(privateKey);/*from   w w  w  .  ja  va  2 s  . c o m*/
    Assert.notNull(data);
    try {
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", PROVIDER);
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        return cipher.doFinal(data);
    } catch (Exception e) {
        return null;
    }
}

From source file:de.scrubstudios.srvmon.notificator.classes.Crypt.java

public static String encrypt(String key, String data) {
    byte[] encryptedData = null;
    SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");

    try {//from   w  w w .  j  ava  2  s  .c  o  m
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");

        cipher.init(Cipher.ENCRYPT_MODE, keySpec);
        encryptedData = cipher.doFinal(data.getBytes());

        byte[] encr64 = Base64.encodeBase64(encryptedData);

        //System.out.println(new String(encr64));

        return new String(encr64);
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | IllegalBlockSizeException
            | BadPaddingException ex) {
        Logger.getLogger(Crypt.class.getName()).log(Level.SEVERE, null, ex);
    }

    return null;
}

From source file:com.vmware.bdd.security.EncryptionGuard.java

/**
 * Decrypt the encrypted text against given secret key.
 * /*from  w  w  w  .  j  a  v a2  s. c om*/
 * @param encodedText
 *           the encrypted string
 * @return the clear string, or null if encrypted string is null
 * @throws CommonException
 *            if input arguments is null
 */
public static String decode(String encodedText) throws GeneralSecurityException, UnsupportedEncodingException {
    if (encodedText == null) {
        return null;
    }

    if (encodedText.length() < SALT_SIZE) {
        throw EncryptionException.SHORT_ENCRYPTED_STRING(encodedText);
    }

    Key key = GuardKeyStore.getEncryptionKey();
    String salt = encodedText.substring(0, SALT_SIZE);
    String encryptedText = encodedText.substring(SALT_SIZE);

    Base64 base64 = new Base64(0); // 0 - no chunking
    byte[] encryptedBytes = base64.decode(encryptedText);

    Cipher cipher = getCiperInternal(Cipher.DECRYPT_MODE, key);
    byte[] outputBytes = cipher.doFinal(encryptedBytes);

    String outputText = new String(outputBytes, UTF8_ENCODING);
    AuAssert.check(salt.equals(outputText.substring(0, SALT_SIZE))); // Assert salt

    return outputText.substring(SALT_SIZE);
}