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:Main.java

public static byte[] getDecCode(byte[] byteD, String seed) {
    byte[] byteFina = null;
    Cipher cipher = null;

    try {/* ww w .  j  ava 2 s .  c  om*/
        SecretKeySpec skeySpec = new SecretKeySpec(getRawKey(seed.getBytes()), "AES");
        cipher = Cipher.getInstance("AES/CFB/NoPadding");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));
        byteFina = cipher.doFinal(byteD);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        cipher = null;
    }

    return byteFina;
}

From source file:com.app.utils.StringEncrypt.java

/**
 * Funcin de tipo String que recibe una llave (key), un vector de inicializacin (iv)
 * y el texto que se desea cifrar//from w ww .j  a va2  s . c o  m
 * @param key la llave en tipo String a utilizar
 * @param iv el vector de inicializacin a utilizar
 * @param cleartext el texto sin cifrar a encriptar
 * @return el texto cifrado en modo String
 * @throws Exception puede devolver excepciones de los siguientes tipos: NoSuchAlgorithmException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, NoSuchPaddingException
 */
public static String encrypt(String key, String iv, String cleartext) throws Exception {
    Cipher cipher = Cipher.getInstance(cI);
    SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), alg);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes());
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);
    byte[] encrypted = cipher.doFinal(cleartext.getBytes());
    return new String(encodeBase64(encrypted));
}

From source file:club.jmint.crossing.specs.Security.java

public static String desEncrypt(String data, String key) throws CrossException {
    String ret = null;/*w ww  . j av a  2s. co  m*/
    try {
        DESKeySpec desKey = new DESKeySpec(key.getBytes("UTF-8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey securekey = keyFactory.generateSecret(desKey);

        Cipher cipher = Cipher.getInstance(CIPHER_DES_ALGORITHM);
        SecureRandom random = new SecureRandom();
        cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
        byte[] results = cipher.doFinal(data.getBytes("UTF-8"));
        ret = Base64.encodeBase64String(results);
    } catch (Exception e) {
        CrossLog.printStackTrace(e);
        throw new CrossException(ErrorCode.COMMON_ERR_ENCRYPTION.getCode(),
                ErrorCode.COMMON_ERR_ENCRYPTION.getInfo());
    }
    return ret;
}

From source file:Main.java

public static byte[] getEncCode(byte[] byteE, String seed) {
    byte[] byteFina = null;
    Cipher cipher = null;

    try {/*from w w w .j a  va  2s . co m*/
        SecretKeySpec skeySpec = new SecretKeySpec(getRawKey(seed.getBytes()), "AES");

        cipher = Cipher.getInstance("AES/CFB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));
        //cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new IvParameterSpec(new byte[cipher.getBlockSize()]));
        byteFina = cipher.doFinal(byteE);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        cipher = null;
    }

    return byteFina;
}

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

/**
 * Decrypt a cipher in bytes using the specified key
 * //  ww  w.j  a  v a2  s  . c  o  m
 * @param cipherBytes encrypted bytes
 * @param key the key used in decryption
 * @param iv
 * @return
 * @throws Exception
 */
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:ec.edu.uce.medicina.seguimiento.util.EncryptionUtility.java

/**
 *Mtodo que permite la encriptacin de la contrasea.
 * @param cleartext/*from   w w w  . j a  v  a2s  .  co  m*/
 * @return
 * @throws java.lang.Exception
 */
public static String encrypt(String cleartext) throws Exception {
    String key = "02AE31B79CCCB2A3"; //llave
    String iv = "0123456789ABCDEF";
    Cipher cipher = Cipher.getInstance(cI);
    SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), alg);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes());
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);
    byte[] encrypted = cipher.doFinal(cleartext.getBytes());
    return new String(encodeBase64(encrypted));
}

From source file:com.greenline.hrs.admin.util.encrypt.DESUtil.java

/**
 * Description ?/*from   w  ww  .ja va 2  s .c  om*/
 *
 * @param data
 * @param key  byte
 * @return
 * @throws Exception
 */
private static byte[] decrypt(byte[] data, byte[] key) throws GeneralSecurityException {
    // ????
    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(data);
}

From source file:com.greenline.hrs.admin.util.encrypt.DESUtil.java

/**
 * Description ?/*from   ww  w.  j a v a 2  s. c  om*/
 *
 * @param data
 * @param key  byte
 * @return
 * @throws Exception
 */
private static byte[] encrypt(byte[] data, byte[] key) throws GeneralSecurityException {
    // ????
    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(data);

}

From source file:JavaTron.JTP.java

/**
 * Encrypts a string/*from w  ww .  j a va  2s  . c om*/
 * @param property
 * @return An encrypted string
 */
public static String encrypt(String property) {
    String p = new String();
    try {
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
        Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
        pbeCipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
        p = base64Encode(pbeCipher.doFinal(property.getBytes()));
    } catch (Exception e) {
        e.printStackTrace();
    }
    return p;
}

From source file:JavaTron.JTP.java

/**
 * Decrypts an encrypted string/*  w w w  .j  a v a 2s.  c om*/
 * @param property
 * @return A plaintext string
 */
public static String decrypt(String property) {
    String p = new String();
    try {
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
        Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
        pbeCipher.init(Cipher.DECRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
        p = new String(pbeCipher.doFinal(base64Decode(property)));
    } catch (Exception e) {
        e.printStackTrace();
    }
    return p;
}