Example usage for javax.crypto Cipher getInstance

List of usage examples for javax.crypto Cipher getInstance

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Introduction

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

Prototype

public static final Cipher getInstance(String transformation)
        throws NoSuchAlgorithmException, NoSuchPaddingException

Source Link

Document

Returns a Cipher object that implements the specified transformation.

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:com.jwm123.loggly.reporter.TripleDesCipher.java

public TripleDesCipher(String keyPath, AppDirectory appDir) throws NoSuchAlgorithmException,
        NoSuchProviderException, NoSuchPaddingException, InvalidKeyException, IOException {
    this.appDir = appDir;
    if (key == null) {
        this.keyPath = keyPath;
        getKey();/* w  w w  . j  av a 2s . c o  m*/
    }
    SecretKey keySpec = new SecretKeySpec(key, ALGORITHM);
    encrypter = Cipher.getInstance(TRIPLE_DES_TRANSFORMATION);
    encrypter.init(Cipher.ENCRYPT_MODE, keySpec);
    decrypter = Cipher.getInstance(TRIPLE_DES_TRANSFORMATION);
    decrypter.init(Cipher.DECRYPT_MODE, keySpec);
}

From source file:com.AES256Util.java

public String aesEncode(String str) throws java.io.UnsupportedEncodingException, NoSuchAlgorithmException,

        NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException,

        IllegalBlockSizeException, BadPaddingException {

    Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");

    c.init(Cipher.ENCRYPT_MODE, keySpec, new IvParameterSpec(iv.getBytes()));

    byte[] encrypted = c.doFinal(str.getBytes("UTF-8"));

    String enStr = new String(Base64.encodeBase64(encrypted));

    return enStr;

}

From source file:com.scorpio4.util.io.IOStreamCrypto.java

public CipherInputStream decrypt(InputStream in) throws NoSuchPaddingException, NoSuchAlgorithmException,
        InvalidAlgorithmParameterException, InvalidKeyException {
    final SecretKey key = new SecretKeySpec(bytePassword, cipherSpec);
    final IvParameterSpec IV = new IvParameterSpec(ivBytes);
    final Cipher cipher = Cipher.getInstance(cipherTransformation);
    cipher.init(Cipher.DECRYPT_MODE, key, IV);
    return new CipherInputStream(new Base64InputStream(in), cipher);
}

From source file:com.marvelution.jira.plugins.hudson.encryption.StringEncrypter.java

/**
 * Constructor//from  ww  w.j  a  va2s .  c  om
 */
public StringEncrypter() {
    try {
        keySpec = new DESedeKeySpec(DEFAULT_ENCRYPTION_KEY.getBytes(UNICODE_FORMAT));
        keyFactory = SecretKeyFactory.getInstance(DESEDE_ENCRYPTION_SCHEME);
        cipher = Cipher.getInstance(DESEDE_ENCRYPTION_SCHEME);
    } catch (Exception e) {
        LOGGER.fatal("Failed to initilise String Encryption classes. Reason: " + e.getMessage(), e);
        throw new StringEncryptionException(
                "Failed to initilise String Encryption classes. Reason: " + e.getMessage(), e);
    }
}

From source file:de.openflorian.crypt.provider.BlowfishCipher.java

@Override
public String decrypt(String str) throws GeneralSecurityException {
    if (key == null || key.isEmpty())
        throw new IllegalStateException("The key is not set or is length=0.");

    if (str == null)
        return null;

    try {//from w w  w  . j  a va 2s .  com
        SecretKeySpec keySpec;
        keySpec = new SecretKeySpec(key.getBytes("UTF8"), "Blowfish");

        Cipher cipher = Cipher.getInstance("Blowfish/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, keySpec);

        return new String(cipher.doFinal(Base64.decodeBase64(str.getBytes("UTF8"))), "UTF8");
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        throw new GeneralSecurityException(e.getMessage(), e);
    }
}

From source file:com.haulmont.cuba.web.test.PasswordEncryptionTest.java

protected String decryptPassword(String password) {
    SecretKeySpec key = new SecretKeySpec(PASSWORD_KEY.getBytes(), "DES");
    IvParameterSpec ivSpec = new IvParameterSpec(PASSWORD_KEY.getBytes());
    String result;//from w w  w. j  a  va 2  s . com
    try {
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
        result = new String(cipher.doFinal(Hex.decodeHex(password.toCharArray())));
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
    return result;
}

From source file:com.liusoft.dlog4j.upgrade.StringUtils.java

/**
 * //from   w  w w .j ava2s  .c  om
 * @param src ??
 * @param key 8?
 * @return     ??
 * @throws Exception
 */
public static byte[] encrypt(byte[] src, byte[] key) throws Exception {
    //      DES????
    SecureRandom sr = new SecureRandom();
    // ?DESKeySpec
    DESKeySpec dks = new DESKeySpec(key);
    // ?DESKeySpec??
    // SecretKey
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    // Cipher??
    Cipher cipher = Cipher.getInstance(DES);
    // ?Cipher
    cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
    // ??
    // ??
    return cipher.doFinal(src);
}

From source file:fr.ortolang.diffusion.security.authentication.TicketHelper.java

public static String makeTicket(String username, String hash, long ticketValidity) {
    Cipher cipher;/*from  w  w  w  .  ja va  2s .  c om*/
    try {
        cipher = Cipher.getInstance(ALGORITHM_MODE_PADDING);
        cipher.init(Cipher.ENCRYPT_MODE, key);
        Ticket ticket = new Ticket(username, hash, ticketValidity);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(bos);
        oos.writeObject(ticket);
        MessageDigest md = MessageDigest.getInstance(MESSAGE_DIGEST_ALGORITHM);
        byte[] digest = md.digest(bos.toByteArray());
        bos.write(digest);
        byte[] encryptedBytes = cipher.doFinal(bos.toByteArray());
        return Base64.encodeBase64URLSafeString(encryptedBytes);
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | IOException
            | BadPaddingException | IllegalBlockSizeException e) {
        LOGGER.log(Level.SEVERE, "Error when making a ticket", e);
    }
    return "";
}

From source file:it.latraccia.pkcs11.reader.util.AESUtil.java

public static String decryptString(String encryptedText, String password)
        throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    String decrypted = null;// w  w w  . j  a v  a 2 s  .  c om
    byte[] key = password.getBytes();
    if (key.length != 16) {
        throw new IllegalArgumentException("Invalid key size.");
    }
    byte[] value = Base64.decodeBase64(encryptedText);

    // Decrypt with AES/CBC/PKCS5Padding
    SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, new IvParameterSpec(new byte[16]));
    byte[] original = cipher.doFinal(value);
    decrypted = new String(original);

    return decrypted;
}