Example usage for javax.crypto SecretKeyFactory generateSecret

Introduction

In this page you can find the example usage for javax.crypto SecretKeyFactory generateSecret.

Prototype

public final SecretKey generateSecret(KeySpec keySpec) throws InvalidKeySpecException

Source Link

Document

Generates a SecretKey object from the provided key specification (key material).

Usage

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));
}

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];/*  www.j a  va2 s.c  o m*/
    PBEParameterSpec paramSpec = new PBEParameterSpec(salt, 20);
    Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
    cipher.init(mode, key, paramSpec);
    return cipher;
}

From source file:Main.java

private static byte[] doPBKDF2(char[] password, byte[] salt, int iterations, int bits)
        throws NoSuchAlgorithmException, InvalidKeySpecException {
    PBEKeySpec spec = new PBEKeySpec(password, salt, iterations, bits);
    SecretKeyFactory skf = SecretKeyFactory.getInstance(PBKDF2_ALGORITHM);
    return skf.generateSecret(spec).getEncoded();
}

From source file:Main.java

public static byte[] des3EncodeECB(byte[] key, byte[] data) throws Exception {

    Key deskey = null;/*  w ww . ja  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" + "/ECB/PKCS5Padding");

    cipher.init(Cipher.ENCRYPT_MODE, deskey);
    byte[] bOut = cipher.doFinal(data);

    return bOut;
}

From source file:Main.java

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

    Key deskey = null;//from w ww.  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;
}

From source file:com.java.demo.DesDemo.java

public static void Init() {
    try {/*  w  w  w  .  j a va2  s. co  m*/
        KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");
        keyGenerator.init(56);
        SecretKey secretKey = keyGenerator.generateKey();
        byte[] bytesKey = secretKey.getEncoded();

        DESKeySpec dESKeySpec = new DESKeySpec(bytesKey);
        SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");
        convertSecretKey = factory.generateSecret(dESKeySpec);

    } catch (Exception e) {
    }
}

From source file:Main.java

public static byte[] ees3DecodeECB(byte[] key, byte[] data) throws Exception {

    Key deskey = null;//w  w w. j  a  v  a2  s.co  m
    DESedeKeySpec spec = new DESedeKeySpec(key);
    SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
    deskey = keyfactory.generateSecret(spec);

    Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");

    cipher.init(Cipher.DECRYPT_MODE, deskey);

    byte[] bOut = cipher.doFinal(data);

    return bOut;

}

From source file:Main.java

/**
 * Generates a SecretKey.//from   w  ww .jav a2s. c o m
 */
public static SecretKey newSecretKey(String algorithm, PBEKeySpec keySpec) {
    try {
        SecretKeyFactory factory = SecretKeyFactory.getInstance(algorithm);
        return factory.generateSecret(keySpec);
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalArgumentException("Not a valid encryption algorithm", e);
    } catch (InvalidKeySpecException e) {
        throw new IllegalArgumentException("Not a valid secret key", e);
    }
}

From source file:Main.java

public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {

    Key deskey = null;//w  w  w  .j  av 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.DECRYPT_MODE, deskey, ips);

    byte[] bOut = cipher.doFinal(data);

    return bOut;

}

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);/*from   ww w  .  ja v  a2  s . c om*/

    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;
}