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:Main.java

private static Cipher getCipherFromPassphrase(String passphrase, byte[] salt, int iterations, int opMode)
        throws GeneralSecurityException {
    SecretKey key = getKeyFromPassphrase(passphrase, salt, iterations);
    Cipher cipher = Cipher.getInstance(key.getAlgorithm());
    cipher.init(opMode, key, new PBEParameterSpec(salt, iterations));

    return cipher;
}

From source file:com.ad.mediasharing.tvmclient.AESEncryption.java

public static byte[] decrypt(byte[] cipherBytes, String key, byte[] iv) throws Exception {
    Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
    AlgorithmParameters params = AlgorithmParameters.getInstance("AES");
    params.init(new IvParameterSpec(iv));
    cipher.init(Cipher.DECRYPT_MODE, getKey(key), params);
    return cipher.doFinal(cipherBytes);
}

From source file:com.drisoftie.cwdroid.util.CredentialUtils.java

private static Cipher getDefaultCipher() {
    Cipher cipher = null;//from   w  w w  .j ava2 s .  com
    try {
        cipher = Cipher.getInstance(AES);
    } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
        e.printStackTrace();
    }
    return cipher;
}

From source file:com.sds.acube.ndisc.mts.xserver.util.XNDiscCipher.java

/**
 * //from   w ww  . j  a  v a  2 s .c o  m
 * 
 * @param data ? ?
 * @return ? ?
 */
public static String encode(String data) {
    try {
        Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte e[] = cipher.doFinal(data.getBytes("UTF-8"));
        return replaceChar(Base64.encodeBase64String(e));
    } catch (NoSuchAlgorithmException e) {
        System.err.print(XNDiscUtils.printStackTrace(e));
    } catch (NoSuchPaddingException e) {
        System.err.print(XNDiscUtils.printStackTrace(e));
    } catch (InvalidKeyException e) {
        System.err.print(XNDiscUtils.printStackTrace(e));
    } catch (IllegalBlockSizeException e) {
        System.err.print(XNDiscUtils.printStackTrace(e));
    } catch (BadPaddingException e) {
        System.err.print(XNDiscUtils.printStackTrace(e));
    } catch (UnsupportedEncodingException e) {
        System.err.print(XNDiscUtils.printStackTrace(e));
    }
    return null;
}

From source file:com.amazonaws.cognito.sync.demo.client.server.AESEncryption.java

private static byte[] decrypt(byte[] cipherBytes, String key, byte[] iv) throws Exception {
    Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
    AlgorithmParameters params = AlgorithmParameters.getInstance("AES");
    params.init(new IvParameterSpec(iv));
    cipher.init(Cipher.DECRYPT_MODE, getKey(key), params);
    return cipher.doFinal(cipherBytes);
}

From source file:com.kylinolap.rest.security.PasswordPlaceholderConfigurer.java

public static String encrypt(String strToEncrypt) {
    try {/*from w  ww  .j  ava  2 s  . co  m*/
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        final String encryptedString = Base64.encodeBase64String(cipher.doFinal(strToEncrypt.getBytes()));
        return encryptedString;
    } catch (Exception e) {
    }
    return null;

}

From source file:edu.wright.cs.sp16.ceg3120.util.PasswordEncryptionUtility.java

/**
 * Encrypts a given string using AES.//w w w.  j a v  a 2  s .c om
 * 
 * @param value
 *            // String to encrypt.
 * @return // Returns encrypted string.
 */
public static String encrypt(String value) {
    try {
        IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);

        byte[] encrypted = cipher.doFinal(value.getBytes("UTF-8"));
        System.out.println("encrypted string: " + Base64.encodeBase64String(encrypted));

        return Base64.encodeBase64String(encrypted);
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    return null;
}

From source file:Logi.GSeries.Libraries.Encryption.java

public static String encrypt(String decryptedString, String password) {
    try {/*w w  w  .  j  av  a2s . c o  m*/
        // build the initialization vector (randomly).
        SecureRandom random = new SecureRandom();
        byte initialVector[] = new byte[16];
        //generate random 16 byte IV AES is always 16bytes
        random.nextBytes(initialVector);
        IvParameterSpec ivspec = new IvParameterSpec(initialVector);
        SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivspec);
        byte[] encrypted = cipher.doFinal(decryptedString.getBytes());
        byte[] encryptedWithIV = new byte[encrypted.length + initialVector.length];
        System.arraycopy(encrypted, 0, encryptedWithIV, 0, encrypted.length);
        System.arraycopy(initialVector, 0, encryptedWithIV, encrypted.length, initialVector.length);
        return Base64.encodeBase64String(encryptedWithIV);
    } catch (Exception ex) {
        Logger.getLogger(Encryption.class.getName()).log(Level.SEVERE, null, ex);
        return "Error";
    }
}

From source file:com.liferay.sync.engine.lan.util.LanTokenUtil.java

public static String createEncryptedToken(String lanTokenKey) throws Exception {

    String lanToken = RandomStringUtils.random(32, 0, 0, true, true, null, _secureRandom);

    byte[] bytes = DigestUtils.sha1(lanTokenKey);

    bytes = Arrays.copyOf(bytes, 16);

    Cipher cipher = Cipher.getInstance("AES");

    cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(bytes, "AES"));

    String encryptedToken = Base64
            .encodeBase64String(cipher.doFinal(lanToken.getBytes(Charset.forName("UTF-8"))));

    _lanTokens.add(lanToken);//from  w ww.  j a v a 2  s  . c om

    return encryptedToken;
}

From source file:DesEncrypter.java

DesEncrypter(SecretKey key) throws Exception {
    byte[] iv = new byte[] { (byte) 0x8E, 0x12, 0x39, (byte) 0x9C, 0x07, 0x72, 0x6F, 0x5A };
    AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv);
    ecipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
    dcipher = Cipher.getInstance("DES/CBC/PKCS5Padding");

    ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
    dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
}