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

private static PKCS8EncodedKeySpec decryptPrivateKey(byte[] encryptedPrivateKey)
        throws GeneralSecurityException {
    EncryptedPrivateKeyInfo epkInfo;
    try {// ww  w .  j a v  a2 s  .com
        epkInfo = new EncryptedPrivateKeyInfo(encryptedPrivateKey);
    } catch (IOException ex) {
        // Probably not an encrypted key.
        return null;
    }

    char[] password = System.console().readPassword("Password for the private key file: ");

    SecretKeyFactory skFactory = SecretKeyFactory.getInstance(epkInfo.getAlgName());
    Key key = skFactory.generateSecret(new PBEKeySpec(password));
    Arrays.fill(password, '\0');

    Cipher cipher = Cipher.getInstance(epkInfo.getAlgName());
    cipher.init(Cipher.DECRYPT_MODE, key, epkInfo.getAlgParameters());

    try {
        return epkInfo.getKeySpec(cipher);
    } catch (InvalidKeySpecException ex) {
        System.err.println("Password may be bad.");
        throw ex;
    }
}

---

From source file:licenceexecuter.Encryptor.java

public static String encrypt(String key, String initVector, String value) {
    try {/*from   w ww  .  j av a  2s .c  om*/
        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());
        return Base64.encodeBase64String(encrypted);
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    return null;
}

---

From source file:com.rdonasco.security.utils.EncryptionUtil.java

public static String encryptWithPassword(String stringToEncrypt, String password) throws Exception {
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(), SALT, COUNT);
    SecretKey pbeKey = getKeyFactory().generateSecret(pbeKeySpec);
    Cipher pbeCipher = Cipher.getInstance(CIPHER_KEY_SPEC);
    pbeCipher.init(Cipher.ENCRYPT_MODE, pbeKey, PBE_PARAM_SPEC);
    byte[] encryptedBytes = pbeCipher.doFinal(stringToEncrypt.getBytes());
    return Base64.encodeBase64String(encryptedBytes);
}

---

From source file:com.rdonasco.security.utils.EncryptionUtil.java

public static String decryptWithPassword(String encryptedString, String password) throws Exception {
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(), SALT, COUNT);
    SecretKey pbeKey = getKeyFactory().generateSecret(pbeKeySpec);
    Cipher pbeCipher = Cipher.getInstance(CIPHER_KEY_SPEC);
    pbeCipher.init(Cipher.DECRYPT_MODE, pbeKey, PBE_PARAM_SPEC);
    byte[] decryptedBytes = pbeCipher.doFinal(Base64.decodeBase64(encryptedString));
    return new String(decryptedBytes);
}

---

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;//from   w ww.j  ava2  s .c  o m
    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;
}

---

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

public static String encryptString(String clearText, String password)
        throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    String encrypted;//from w ww .j  a  v  a2s.  co m
    byte[] key = password.getBytes();
    // Check the length of the password
    if (key.length != 16) {
        throw new IllegalArgumentException("Invalid password length.");
    }
    byte[] value = clearText.getBytes();

    // Encrypt with AES/CBC/PKCS5Padding
    SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new IvParameterSpec(new byte[16]));
    byte[] encryptedBytes = cipher.doFinal(value);

    // Encode the bytes in base64
    encrypted = Base64.encodeBase64String(encryptedBytes);
    return encrypted;
}

---

From source file:cr.ac.uia.SistemaGC.utils.AES.java

public static String encrypt(Long cedula, String usuario, String contrasena) {
    //<editor-fold defaultstate="collapsed" desc="Mtodo para cifrar contraseas">
    /*/*from   ww  w.j av  a  2  s. c  o  m*/
    * Inspirado en:
    * http://stackoverflow.com/questions/15554296/simple-java-aes-encrypt-decrypt-example
     */
    try {
        IvParameterSpec iv = new IvParameterSpec(fitString(usuario, 16).getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(fitString(cedula.toString(), 16).getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(contrasena.getBytes());
        return Base64.encodeBase64String(encrypted);
    } catch (UnsupportedEncodingException | NoSuchAlgorithmException | NoSuchPaddingException
            | InvalidKeyException | InvalidAlgorithmParameterException | IllegalBlockSizeException
            | BadPaddingException e) {
        e.printStackTrace();
        System.err.println(e.getClass().getName() + ": " + e.getMessage());
        System.exit(0);
    }
    return null;
    //</editor-fold>
}

---

From source file:Main.java

public static byte[] DESTemplet(byte[] data, byte[] key, String algorithm, String transformation,
        boolean isEncrypt) {
    try {/*from ww w.  j  av  a2  s. c om*/
        SecretKeySpec keySpec = new SecretKeySpec(key, algorithm);
        Cipher cipher = Cipher.getInstance(transformation);
        SecureRandom random = new SecureRandom();
        cipher.init(isEncrypt ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE, keySpec, random);
        return cipher.doFinal(data);
    } catch (Throwable e) {
        e.printStackTrace();
    }
    return null;
}

---

From source file:Main.java

public static byte[] desTemplate(byte[] data, byte[] key, String algorithm, String transformation,
        boolean isEncrypt) {
    if (data == null || data.length == 0 || key == null || key.length == 0)
        return null;
    try {/*from   w w w .j  a  v  a  2  s. co  m*/
        SecretKeySpec keySpec = new SecretKeySpec(key, algorithm);
        Cipher cipher = Cipher.getInstance(transformation);
        SecureRandom random = new SecureRandom();
        cipher.init(isEncrypt ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE, keySpec, random);
        return cipher.doFinal(data);
    } catch (Throwable e) {
        e.printStackTrace();
        return null;
    }
}

---

From source file:Main.java

public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {

    Key deskey = null;/*from   www.j  a v a 2  s  .c o  m*/
    DESedeKeySpec spec = new DESedeKeySpec(key);
    SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
    deskey = keyfactory.generateSecret(spec);

    Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
    IvParameterSpec ips = new IvParameterSpec(keyiv);
    cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
    byte[] bOut = cipher.doFinal(data);

    return bOut;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• »