Example usage for javax.crypto Cipher init

Introduction

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

Prototype

public final void init(int opmode, Certificate certificate, SecureRandom random) throws InvalidKeyException

Source Link

Document

Initializes this cipher with the public key from the given certificate and a source of randomness.

Usage

From source file:com.vmware.fdmsecprotomgmt.PasswdEncrypter.java

/**
 * Encrypt the value with key provided/*from  w  w  w  . ja  v  a  2s.  co  m*/
 */
private static String encrypt(String key, String value) {
    String encryptedString = null;
    try {
        IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR.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());
        encryptedString = Base64.encodeBase64String(encrypted);
    } catch (Exception ex) {
        System.out.println("Caught exception while encrypting string : " + value);
        ex.printStackTrace();
    }

    return encryptedString;
}

From source file:com.vmware.fdmsecprotomgmt.PasswdEncrypter.java

/**
 * Decrypt the encrypted value with provided key
 *///from   w  w w .ja  v a2  s.  c o m
public static String decrypt(String key, String encryptedValue) {
    String decryptedString = null;
    try {
        IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

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

        decryptedString = new String(cipher.doFinal(Base64.decodeBase64(encryptedValue)));

    } catch (Exception ex) {
        System.out.println("Caught exception while decrypting string");
        ex.printStackTrace();
    }

    return decryptedString;
}

From source file:io.stallion.utils.Encrypter.java

private static String doDecryptString(String password, String encryptedBase32) throws Exception {
    encryptedBase32 = StringUtils.strip(encryptedBase32, "=");
    String salt = encryptedBase32.substring(0, 16);
    String ivString = encryptedBase32.substring(16, 48);
    byte[] iv = new byte[0];
    try {/*from  www.  j a  v a 2s .c  o m*/
        iv = Hex.decodeHex(ivString.toCharArray());
    } catch (DecoderException e) {
        throw new RuntimeException(e);
    }
    encryptedBase32 = encryptedBase32.substring(48);
    Base32 decoder = new Base32();
    byte[] encrypted = decoder.decode(encryptedBase32.toUpperCase());
    SecretKeySpec skeySpec = makeKeySpec(password, salt);

    /*
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec,
            new IvParameterSpec(iv));
      */
    Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, new GCMParameterSpec(128, iv));

    byte[] original = cipher.doFinal(encrypted);
    return new String(original, Charset.forName("UTF-8"));

}

From source file:com.amazonaws.tvm.AESEncryption.java

public static byte[] encrypt(String clearText, 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.ENCRYPT_MODE, getKey(key), params);
    return cipher.doFinal(clearText.getBytes());
}

From source file:io.stallion.utils.Encrypter.java

public static String encryptString(String password, String value) {
    String salt = KeyGenerators.string().generateKey();
    SecretKeySpec skeySpec = makeKeySpec(password, salt);
    byte[] iv = KeyGenerators.secureRandom(16).generateKey();
    String ivString = Hex.encodeHexString(iv);

    try {/* ww  w. java2 s. c  om*/
        Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new GCMParameterSpec(128, iv));
        /*
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec,
        new IvParameterSpec(iv));
        */

        byte[] encrypted = cipher.doFinal(value.getBytes(Charset.forName("UTF-8")));
        String s = StringUtils.strip(new Base32().encodeAsString(encrypted), "=").toLowerCase();
        // Strip line breaks
        s = salt + ivString + s.replaceAll("(\\n|\\r)", "");
        return s;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

static String encryptRsaB64(byte[] bytes, Key pubRsaKey) {
    try {//from   www  .  j a v a2s .  c  o m
        Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "SC");
        // cipher.init(Cipher.ENCRYPT_MODE, pubRsaKey, new SecureRandom());
        SecureRandom sc = null;
        cipher.init(Cipher.ENCRYPT_MODE, pubRsaKey, sc);
        byte[] cipherText = cipher.doFinal(bytes);
        return encodeB64(cipherText);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

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.liusoft.dlog4j.upgrade.StringUtils.java

/**
 * /*  w w  w .  j  a  v a  2  s . co m*/
 * @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:com.liusoft.dlog4j.upgrade.StringUtils.java

/**
 * /*w  w  w  .j  a  v  a2 s . co  m*/
 * @param src   ??
 * @param key   8?
 * @return      ??
 * @throws Exception
 */
public static byte[] decrypt(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.DECRYPT_MODE, securekey, sr);
    // ??
    // ??
    return cipher.doFinal(src);
}

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

/**
 * Get a cipher instance when need it, not share between multiple threads
 * because cipher is not thread safe.//w  w w.  j  a v a2 s.  c o  m
 * 
 * @param opmode
 *           the operation mode
 * @param key
 *           the key
 * @return initialized cipher instance
 */
private static Cipher getCiperInternal(int opmode, Key key) throws GeneralSecurityException {
    Cipher cipher = Cipher.getInstance(TRANSFORMATION);
    IvParameterSpec ips = new IvParameterSpec(IV_PARAMETER, 0, 16);
    cipher.init(opmode, key, ips);
    return cipher;
}