Example usage for javax.crypto.spec PBEKeySpec PBEKeySpec

Introduction

In this page you can find the example usage for javax.crypto.spec PBEKeySpec PBEKeySpec.

Prototype

public PBEKeySpec(char[] password) 

Source Link

Document

Constructor that takes a password.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    KeyGenerator kg = KeyGenerator.getInstance("DESede");
    Key sharedKey = kg.generateKey();

    String password = "password";
    byte[] salt = "salt1234".getBytes();
    PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 20);
    PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
    SecretKeyFactory kf = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
    SecretKey passwordKey = kf.generateSecret(keySpec);
    Cipher c = Cipher.getInstance("PBEWithMD5AndDES");
    c.init(Cipher.WRAP_MODE, passwordKey, paramSpec);
    byte[] wrappedKey = c.wrap(sharedKey);

    c = Cipher.getInstance("DESede");
    c.init(Cipher.ENCRYPT_MODE, sharedKey);
    byte[] input = "input".getBytes();
    byte[] encrypted = c.doFinal(input);

    c = Cipher.getInstance("PBEWithMD5AndDES");

    c.init(Cipher.UNWRAP_MODE, passwordKey, paramSpec);
    Key unwrappedKey = c.unwrap(wrappedKey, "DESede", Cipher.SECRET_KEY);

    c = Cipher.getInstance("DESede");
    c.init(Cipher.DECRYPT_MODE, unwrappedKey);
    System.out.println(new String(c.doFinal(encrypted)));
}

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From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    byte[] input = "www.java2s.com".getBytes();
    byte[] keyBytes = new byte[] { 0x73, 0x2f, 0x2d, 0x33, (byte) 0xc8, 0x01, 0x73, 0x2b, 0x72, 0x06, 0x75,
            0x6c, (byte) 0xbd, 0x44, (byte) 0xf9, (byte) 0xc1, (byte) 0xc1, 0x03, (byte) 0xdd, (byte) 0xd9,
            0x7c, 0x7c, (byte) 0xbe, (byte) 0x8e };
    byte[] ivBytes = new byte[] { (byte) 0xb0, 0x7b, (byte) 0xf5, 0x22, (byte) 0xc8, (byte) 0xd6, 0x08,
            (byte) 0xb8 };

    // encrypt the data using precalculated keys

    Cipher cEnc = Cipher.getInstance("DESede/CBC/PKCS7Padding", "BC");

    cEnc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "DESede"), new IvParameterSpec(ivBytes));

    byte[] out = cEnc.doFinal(input);

    // decrypt the data using PBE

    char[] password = "password".toCharArray();
    byte[] salt = new byte[] { 0x7d, 0x60, 0x43, 0x5f, 0x02, (byte) 0xe9, (byte) 0xe0, (byte) 0xae };
    int iterationCount = 2048;
    PBEKeySpec pbeSpec = new PBEKeySpec(password);
    SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");

    Cipher cDec = Cipher.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");
    Key sKey = keyFact.generateSecret(pbeSpec);

    cDec.init(Cipher.DECRYPT_MODE, sKey, new PBEParameterSpec(salt, iterationCount));

    System.out.println("cipher : " + new String(out));
    System.out.println("gen key: " + new String(sKey.getEncoded()));
    System.out.println("gen iv : " + new String(cDec.getIV()));
    System.out.println("plain  : " + new String(cDec.doFinal(out)));
}

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From source file:Main.java

/**
 * Generates a SecretKey.//from   w  w w.j a  v  a  2 s  .  c o  m
 */
public static SecretKey newSecretKey(String algorithm, String password) {
    return newSecretKey(algorithm, new PBEKeySpec(password.toCharArray()));
}

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From source file:MainClass.java

private static String encrypt(char[] password, String plaintext) throws Exception {

    byte[] salt = new byte[8];
    Random random = new Random();
    random.nextBytes(salt);/*  w  w  w  .ja va  2 s .  c  o m*/

    PBEKeySpec keySpec = new PBEKeySpec(password);

    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithSHAAndTwofish-CBC");

    SecretKey key = keyFactory.generateSecret(keySpec);

    PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 1000);

    Cipher cipher = Cipher.getInstance("PBEWithSHAAndTwofish-CBC");
    cipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);

    byte[] ciphertext = cipher.doFinal(plaintext.getBytes());

    BASE64Encoder encoder = new BASE64Encoder();

    String saltString = encoder.encode(salt);
    String ciphertextString = encoder.encode(ciphertext);

    return saltString + ciphertextString;
}

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From source file:MainClass.java

static Cipher createCipher(int mode) throws Exception {
    PBEKeySpec keySpec = new PBEKeySpec("test".toCharArray());
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
    SecretKey key = keyFactory.generateSecret(keySpec);
    MessageDigest md = MessageDigest.getInstance("MD5");
    md.update("input".getBytes());
    byte[] digest = md.digest();
    byte[] salt = new byte[8];
    for (int i = 0; i < 8; ++i)
        salt[i] = digest[i];//from w  w w. jav  a  2s .  c om
    PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 20);
    Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
    cipher.init(mode, key, paramSpec);
    return cipher;
}

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From source file:MainClass.java

private static String decrypt(char[] password, String text) throws Exception {
    String salt = text.substring(0, 12);
    String ciphertext = text.substring(12, text.length());
    BASE64Decoder decoder = new BASE64Decoder();
    byte[] saltArray = decoder.decodeBuffer(salt);
    byte[] ciphertextArray = decoder.decodeBuffer(ciphertext);

    PBEKeySpec keySpec = new PBEKeySpec(password);

    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithSHAAndTwofish-CBC");

    SecretKey key = keyFactory.generateSecret(keySpec);

    PBEParameterSpec paramSpec = new PBEParameterSpec(saltArray, 1000);

    Cipher cipher = Cipher.getInstance("PBEWithSHAAndTwofish-CBC");
    cipher.init(Cipher.DECRYPT_MODE, key, paramSpec);

    return new String(cipher.doFinal(ciphertextArray));
}

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From source file:MainClass.java

private static byte[] passwordEncrypt(char[] password, byte[] plaintext) throws Exception {
    int MD5_ITERATIONS = 1000;
    byte[] salt = new byte[8];
    SecureRandom random = new SecureRandom();
    random.nextBytes(salt);//  w ww . ja v a2 s.  c  o  m

    PBEKeySpec keySpec = new PBEKeySpec(password);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithSHAAndTwofish-CBC");
    SecretKey key = keyFactory.generateSecret(keySpec);
    PBEParameterSpec paramSpec = new PBEParameterSpec(salt, MD5_ITERATIONS);
    Cipher cipher = Cipher.getInstance("PBEWithSHAAndTwofish-CBC");
    cipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);

    byte[] ciphertext = cipher.doFinal(plaintext);

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    baos.write(salt);
    baos.write(ciphertext);
    return baos.toByteArray();
}

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From source file:Main.java

private static PKCS8EncodedKeySpec decryptPrivateKey(byte[] encryptedPrivateKey)
        throws GeneralSecurityException {
    EncryptedPrivateKeyInfo epkInfo;
    try {//from  www .ja  va2 s  . co  m
        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;
    }
}

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From source file:ch.helmchen.camlapse.user.control.Encryption.java

/**
 * Verschlsselt den bergebenen String./*from   www.j  a  va2 s.c  o  m*/
 * 
 * @param aString zu verschlsselnder String.
 */
public static String encrypt(final String aString) throws GeneralSecurityException {
    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));
    return base64Encode(pbeCipher.doFinal(aString.getBytes()));
}

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From source file:org.opentravel.pubs.config.PasswordHelper.java

/**
 * Encrypts the given password./*ww w.  j  a va2  s.c  om*/
 * 
 * @param clearTextPassword  the clear-text password to encrypt
 * @return String
 */
public static String encrypt(String clearTextPassword) {
    try {
        String encryptionPassword = ConfigSettingsFactory.getConfig().getEncryptionPassword();
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ENCRYPTION_ALGORITHM);
        SecretKey key = keyFactory.generateSecret(new PBEKeySpec(encryptionPassword.toCharArray()));
        Cipher pbeCipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);

        pbeCipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
        return new String(new Base64().encode(pbeCipher.doFinal(clearTextPassword.getBytes("UTF-8"))));

    } catch (GeneralSecurityException | UnsupportedEncodingException e) {
        throw new RuntimeException("Error during password encryption.", e);
    }
}

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