Example usage for javax.crypto SecretKeyFactory getKeySpec

Introduction

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

Prototype

public final KeySpec getKeySpec(SecretKey key, Class<?> keySpec) throws InvalidKeySpecException 

Source Link

Document

Returns a specification (key material) of the given key object in the requested format.

Usage

From source file:MainClass.java

public static void main(String args[]) throws Exception {

    KeyGenerator keyGen = KeyGenerator.getInstance("DES");
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
    random.setSeed(101L);/* w  w  w  .  j a  va  2s . co m*/
    keyGen.init(56, random);
    SecretKey sKey = keyGen.generateKey();
    SecretKeyFactory kfactory = SecretKeyFactory.getInstance("DES");

    DESKeySpec kspec = (DESKeySpec) kfactory.getKeySpec(sKey, DESKeySpec.class);

    System.out.println(sKey);
    FileOutputStream fos = new FileOutputStream("secretKeys");
    ObjectOutputStream oos = new ObjectOutputStream(fos);

    oos.writeObject(kspec.getKey());

    FileInputStream fin = new FileInputStream("secretKeys");
    ObjectInputStream ois = new ObjectInputStream(fin);

    byte[] kMaterial = (byte[]) ois.readObject();

    DESKeySpec keyspec = new DESKeySpec(kMaterial);
    SecretKey newKey = kfactory.generateSecret(keyspec);
    System.out.println(newKey);
    System.out.println("Do the keys equal :" + newKey.equals(sKey));

}

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From source file:MainClass.java

public static void main(String args[]) throws Exception {
    KeyGenerator kg = KeyGenerator.getInstance("DES");
    kg.init(new SecureRandom());
    SecretKey key = kg.generateKey();
    SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
    Class spec = Class.forName("javax.crypto.spec.DESKeySpec");
    DESKeySpec ks = (DESKeySpec) skf.getKeySpec(key, spec);
    ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("keyfile"));
    oos.writeObject(ks.getKey());//from   w w  w  .ja  v  a2  s . c  o  m

    Cipher c = Cipher.getInstance("DES/CFB8/NoPadding");
    c.init(Cipher.ENCRYPT_MODE, key);
    CipherOutputStream cos = new CipherOutputStream(new FileOutputStream("ciphertext"), c);
    PrintWriter pw = new PrintWriter(new OutputStreamWriter(cos));
    pw.println("Stand and unfold yourself");
    pw.close();
    oos.writeObject(c.getIV());
    oos.close();
}

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From source file:Main.java

/**
 * Creates an encoded DESedeKeySpec from a SecretKey
 * //  w  ww  .jav a 2  s .co m
 * @param key
 * @return
 * @throws NoSuchAlgorithmException
 * @throws InvalidKeySpecException
 */
public static byte[] createDESedeKeySpec(SecretKey key)
        throws NoSuchAlgorithmException, InvalidKeySpecException {
    SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DESede");
    DESedeKeySpec keyspec = (DESedeKeySpec) keyfactory.getKeySpec(key, DESedeKeySpec.class);
    return keyspec.getKey();
}

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From source file:TripleDES.java

/** Save the specified TripleDES SecretKey to the specified file */
public static void writeKey(SecretKey key, File f)
        throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
    // Convert the secret key to an array of bytes like this
    SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DESede");
    DESedeKeySpec keyspec = (DESedeKeySpec) keyfactory.getKeySpec(key, DESedeKeySpec.class);
    byte[] rawkey = keyspec.getKey();

    // Write the raw key to the file
    FileOutputStream out = new FileOutputStream(f);
    out.write(rawkey);/*  ww  w .j a  v  a2  s  .c  o m*/
    out.close();
}

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From source file:com.hernandez.rey.crypto.TripleDES.java

/**
 * Save the specified TripleDES SecretKey to the specified file
 * /* w w  w. j  ava2s  . c  o m*/
 * @param key the key to write
 * @param keyFile
 * @throws IOException
 * @throws NoSuchAlgorithmException
 * @throws InvalidKeySpecException
 */
public static void writeKey(final SecretKey key, final File keyFile)
        throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
    // Convert the secret key to an array of bytes like this
    final SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("DESede");
    final DESedeKeySpec keyspec = (DESedeKeySpec) keyfactory.getKeySpec(key, DESedeKeySpec.class);
    final byte[] rawkey = keyspec.getKey();

    final byte[] encodedKey = Base64.encodeBase64(rawkey);

    // Write the raw key to the file
    FileOutputStream out = new FileOutputStream(keyFile);
    out.write(encodedKey);
    out.close();

    out = new FileOutputStream(new File(keyFile.toString().concat("-raw")));
    out.write(rawkey);
    out.close();
}

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From source file:io.manasobi.utils.CryptoUtils.java

/**
 * ?   ?. ??  ?  ??  ?  ?.//w w w.  j  ava 2 s  .  c  om
 *
 * @return ?? ??  Hex ?  
 */
public static String generateHexDESKey() {

    byte[] rawKey = null;

    try {

        KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM);

        SecretKey secretKey = keyGenerator.generateKey();

        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(ALGORITHM);

        DESedeKeySpec desEdeSpec = (DESedeKeySpec) secretKeyFactory.getKeySpec(secretKey,
                javax.crypto.spec.DESedeKeySpec.class);

        rawKey = desEdeSpec.getKey();

    } catch (Exception e) {

        throw new CryptoUtilsException(e.getMessage());
    }

    return new String(Hex.encodeHex(rawKey));
}

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From source file:it.scoppelletti.security.keygen.DESKeyToPropertySetProvider.java

public Properties toProperties(Key key) {
    byte[] data;// ww  w . j  ava2s .  co  m
    SecretKey desKey;
    SecretKeyFactory keyFactory;
    DESKeySpec param;
    Properties props;

    if (!(key instanceof SecretKey)) {
        return null;
    }

    try {
        keyFactory = SecretKeyFactory.getInstance(DESKeyFactory.ALGORITHM);
    } catch (NoSuchAlgorithmException ex) {
        return null;
    }

    try {
        desKey = keyFactory.translateKey((SecretKey) key);
    } catch (InvalidKeyException ex) {
        return null;
    }

    try {
        param = (DESKeySpec) keyFactory.getKeySpec(desKey, DESKeySpec.class);
    } catch (InvalidKeySpecException ex) {
        return null;
    }

    props = new Properties();
    props.setProperty(CryptoUtils.PROP_KEYFACTORY, DESKeyFactory.class.getName());
    data = param.getKey();
    props.setProperty(DESKeyFactory.PROP_KEY, Hex.encodeHexString(data));
    Arrays.fill(data, Byte.MIN_VALUE);

    return props;
}

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From source file:it.scoppelletti.security.keygen.DESedeKeyToPropertySetProvider.java

public Properties toProperties(Key key) {
    byte[] data;//from ww  w. ja v a2 s  .  c  o m
    SecretKey desKey;
    SecretKeyFactory keyFactory;
    DESedeKeySpec param;
    Properties props;

    if (!(key instanceof SecretKey)) {
        return null;
    }

    try {
        keyFactory = SecretKeyFactory.getInstance(DESedeKeyFactory.ALGORITHM);
    } catch (NoSuchAlgorithmException ex) {
        return null;
    }

    try {
        desKey = keyFactory.translateKey((SecretKey) key);
    } catch (InvalidKeyException ex) {
        return null;
    }

    try {
        param = (DESedeKeySpec) keyFactory.getKeySpec(desKey, DESedeKeySpec.class);
    } catch (InvalidKeySpecException ex) {
        return null;
    }

    props = new Properties();
    props.setProperty(CryptoUtils.PROP_KEYFACTORY, DESedeKeyFactory.class.getName());
    data = param.getKey();
    props.setProperty(DESedeKeyFactory.PROP_KEY, Hex.encodeHexString(data));
    Arrays.fill(data, Byte.MIN_VALUE);

    return props;
}

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From source file:org.kuali.rice.core.impl.encryption.DemonstrationGradeEncryptionServiceImpl.java

/**
 * /*w  ww. ja v  a 2 s  .c  om*/
 * This method generates keys. This method is implementation specific and should not be present in any general purpose interface
 * extracted from this class.
 * 
 * @return
 * @throws Exception
 */
public static String generateEncodedKey() throws Exception {
    KeyGenerator keygen = KeyGenerator.getInstance("DES");
    SecretKey desKey = keygen.generateKey();

    // Create the cipher
    Cipher cipher = Cipher.getInstance(ALGORITHM);
    cipher.init((Cipher.WRAP_MODE), desKey);

    SecretKeyFactory desFactory = SecretKeyFactory.getInstance("DES");
    DESKeySpec desSpec = (DESKeySpec) desFactory.getKeySpec(desKey, javax.crypto.spec.DESKeySpec.class);
    byte[] rawDesKey = desSpec.getKey();

    return new String(Base64.encodeBase64(rawDesKey));
}

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From source file:org.kuali.rice.core.impl.encryption.EncryptionServiceImplTest.java

private String generateDESKey() throws Exception {
    KeyGenerator keygen = KeyGenerator.getInstance("DES");
    SecretKey desKey = keygen.generateKey();
    SecretKeyFactory desFactory = SecretKeyFactory.getInstance("DES");
    DESKeySpec desSpec = (DESKeySpec) desFactory.getKeySpec(desKey, javax.crypto.spec.DESKeySpec.class);
    byte[] rawDesKey = desSpec.getKey();
    return new String(Base64.encodeBase64(rawDesKey));
}

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