Example usage for java.security AlgorithmParameters getParameterSpec

Introduction

In this page you can find the example usage for java.security AlgorithmParameters getParameterSpec.

Prototype

public final <T extends AlgorithmParameterSpec> T getParameterSpec(Class<T> paramSpec)
        throws InvalidParameterSpecException 

Source Link

Document

Returns a (transparent) specification of this parameter object.

Usage

From source file:com.filelocker.encryption.AES_Encryption.java

/**
 * this must be called after creating the initial Crypto object. It creates a salt of SALT_LEN bytes
 * and generates the salt bytes using secureRandom().  The encryption secret key is created
 * along with the initialization vectory. The member variable vEcipher is created to be used
 * by the class later on when either creating a CipherOutputStream, or encrypting a buffer
 * to be written to disk.//from  w  ww  .j  a  v a2s  .  co  m
 *
 * @throws NoSuchAlgorithmException
 * @throws InvalidKeySpecException
 * @throws NoSuchPaddingException
 * @throws InvalidParameterSpecException
 * @throws IllegalBlockSizeException
 * @throws BadPaddingException
 * @throws UnsupportedEncodingException
 * @throws InvalidKeyException
 */
public void setupEncrypt() throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException,
        InvalidParameterSpecException, IllegalBlockSizeException, BadPaddingException,
        UnsupportedEncodingException, InvalidKeyException {
    SecretKeyFactory factory = null;
    SecretKey tmp = null;

    // crate secureRandom salt and store  as member var for later use
    vSalt = new byte[SALT_LEN];
    SecureRandom rnd = new SecureRandom();
    rnd.nextBytes(vSalt);
    Db("generated salt :" + Hex.encodeHexString(vSalt));

    factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");

    /* Derive the key, given password and salt.
     *
     * in order to do 256 bit crypto, you have to muck with the files for Java's "unlimted security"
     * The end user must also install them (not compiled in) so beware.
     * see here:  http://www.javamex.com/tutorials/cryptography/unrestricted_policy_files.shtml
     */
    KeySpec spec = new PBEKeySpec(vPassword.toCharArray(), vSalt, ITERATIONS, KEYLEN_BITS);
    tmp = factory.generateSecret(spec);
    SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");

    /* Create the Encryption cipher object and store as a member variable
     */
    vEcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    vEcipher.init(Cipher.ENCRYPT_MODE, secret);
    AlgorithmParameters params = vEcipher.getParameters();

    // get the initialization vectory and store as member var
    vInitVec = params.getParameterSpec(IvParameterSpec.class).getIV();

    Db("vInitVec is :" + Hex.encodeHexString(vInitVec));
}

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From source file:ropes.Crypto.java

/**
* this must be called after creating the initial Crypto object. It creates a salt of SALT_LEN bytes
* and generates the salt bytes using secureRandom().  The encryption secret key is created 
* along with the initialization vectory. The member variable mEcipher is created to be used
* by the class later on when either creating a CipherOutputStream, or encrypting a buffer
* to be written to disk.//from  ww w  . ja va 2  s  .co  m
*  
* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
* @throws NoSuchPaddingException
* @throws InvalidParameterSpecException
* @throws IllegalBlockSizeException
* @throws BadPaddingException
* @throws UnsupportedEncodingException
* @throws InvalidKeyException
*/
public void setupEncrypt() {
    try {
        SecretKeyFactory factory = null;
        SecretKey tmp = null;

        // crate secureRandom salt and store  as member var for later use
        mSalt = new byte[SALT_LEN];
        SecureRandom rnd = new SecureRandom();
        rnd.nextBytes(mSalt);
        Db("generated salt :" + Hex.encodeHexString(mSalt));

        factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");

        /* Derive the key, given password and salt.
        *
        * in order to do 256 bit crypto, you have to muck with the files for Java's "unlimted security"
        * The end user must also install them (not compiled in) so beware.
        * see here:  http://www.javamex.com/tutorials/cryptography/unrestricted_policy_files.shtml
        */
        KeySpec spec = new PBEKeySpec(mPassword.toCharArray(), mSalt, ITERATIONS, KEYLEN_BITS);
        tmp = factory.generateSecret(spec);
        SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");

        /* Create the Encryption cipher object and store as a member variable
        */
        mEcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        mEcipher.init(Cipher.ENCRYPT_MODE, secret);
        AlgorithmParameters params = mEcipher.getParameters();

        // get the initialization vectory and store as member var
        mInitVec = params.getParameterSpec(IvParameterSpec.class).getIV();

        Db("mInitVec is :" + Hex.encodeHexString(mInitVec));
    } catch (NoSuchAlgorithmException ex) {
        Logger.getLogger(Crypto.class.getName()).log(Level.SEVERE, null, ex);
    } catch (InvalidKeySpecException ex) {
        Logger.getLogger(Crypto.class.getName()).log(Level.SEVERE, null, ex);
    } catch (NoSuchPaddingException ex) {
        Logger.getLogger(Crypto.class.getName()).log(Level.SEVERE, null, ex);
    } catch (InvalidKeyException ex) {
        Logger.getLogger(Crypto.class.getName()).log(Level.SEVERE, null, ex);
    } catch (InvalidParameterSpecException ex) {
        Logger.getLogger(Crypto.class.getName()).log(Level.SEVERE, null, ex);
    }
}

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From source file:ch.bfh.evoting.alljoyn.MessageEncrypter.java

/**
 * Method that encrypts data//from   w ww . j a  v  a 2 s  . c  o  m
 * @param data The data which should be encrypted
 * @return The encrypted bytes, null if encryption failed
 * 
 */
public byte[] encrypt(byte[] data) {
    //Inspired from http://stackoverflow.com/questions/992019/java-256-bit-aes-password-based-encryption

    Cipher cipher;
    try {
        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

        // cipher.getParameters() seems to return null on Android 4.3 (Bug?)
        // Solution implemented from here: 
        // https://code.google.com/p/android/issues/detail?id=58191
        byte[] iv;
        if (android.os.Build.VERSION.SDK_INT > android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
            iv = generateIv();
            cipher.init(Cipher.ENCRYPT_MODE, secretKey, new IvParameterSpec(iv));
        } else {
            cipher.init(Cipher.ENCRYPT_MODE, secretKey);
            AlgorithmParameters params = cipher.getParameters();
            iv = params.getParameterSpec(IvParameterSpec.class).getIV();
        }

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

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        outputStream.write(iv);
        outputStream.write(cipherText);

        return outputStream.toByteArray();
    } catch (NoSuchAlgorithmException e) {
        Log.d(TAG, e.getMessage() + " ");
        e.printStackTrace();
        return null;
    } catch (NoSuchPaddingException e) {
        Log.d(TAG, e.getMessage() + " ");
        e.printStackTrace();
        return null;
    } catch (InvalidKeyException e) {
        Log.d(TAG, e.getMessage() + " ");
        e.printStackTrace();
        return null;
    } catch (InvalidParameterSpecException e) {
        Log.d(TAG, e.getMessage() + " ");
        e.printStackTrace();
        return null;
    } catch (IllegalBlockSizeException e) {
        Log.d(TAG, e.getMessage() + " ");
        e.printStackTrace();
        return null;
    } catch (BadPaddingException e) {
        Log.d(TAG, e.getMessage() + " ");
        e.printStackTrace();
        return null;
    } catch (IOException e) {
        Log.d(TAG, e.getMessage() + " ");
        e.printStackTrace();
        return null;
    } catch (InvalidAlgorithmParameterException e) {
        Log.d(TAG, e.getMessage() + " ");
        e.printStackTrace();
        return null;
    }
}

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From source file:com.meltmedia.jackson.crypto.EncryptionService.java

/**
 * Creates a cipher for doing encryption.  The generated iv is placed in the value as a side effect.
 * //from  w ww  .jav  a2  s .  co m
 * @param secret the pre stretched secret key
 * @param value the value that the encrypted data will be stored in.
 * @return the cipher to use.
 * @throws EncryptionException
 */
Cipher createEncryptionCipher(SecretKey secret, E value) throws EncryptionException {
    if (Ciphers.AES_256_CBC.equals(value.getCipher())
            && KeyDerivations.PBKDF2.equals(value.getKeyDerivation())) {
        try {
            SecretKeySpec spec = new SecretKeySpec(secret.getEncoded(), "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, spec);
            AlgorithmParameters params = cipher.getParameters();
            value.setIv(params.getParameterSpec(IvParameterSpec.class).getIV());
            return cipher;
        } catch (InvalidKeyException | NoSuchAlgorithmException | NoSuchPaddingException
                | InvalidParameterSpecException e) {
            throw new EncryptionException("could not create encryption cypher", e);
        }
    } else {
        throw new EncryptionException(String.format("unsupported cipher %s and key derivation %s",
                value.getCipher(), value.getKeyDerivation()));
    }
}

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From source file:org.jasig.cas.extension.clearpass.EncryptedMapDecorator.java

protected String encrypt(final String value, final String hashedKey) {
    if (value == null) {
        return null;
    }/*from w  w w  .  j  a  v a 2  s  . com*/

    try {
        final Cipher cipher = getCipherObject();
        cipher.init(Cipher.ENCRYPT_MODE, this.key);
        AlgorithmParameters params = cipher.getParameters();

        if (hashedKey != null) {
            algorithmParametersHashMap.put(hashedKey, params.getParameterSpec(IvParameterSpec.class));
        }

        byte[] valueByteArray = value.getBytes();
        byte[] encryptedByteArray = cipher.doFinal(valueByteArray);
        byte[] encrypted64ByteValue = new Base64().encode(encryptedByteArray);

        return new String(encrypted64ByteValue);

    } catch (final Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:org.apache.sling.discovery.base.connectors.ping.TopologyRequestValidator.java

/**
 * Encrypt a payload with the numbed key/
 *
 * @param payload the payload./*from   w  w  w.ja  v a2s . c  om*/
 * @param keyNo the key number.
 * @return an encrypted version.
 * @throws IllegalBlockSizeException
 * @throws BadPaddingException
 * @throws UnsupportedEncodingException
 * @throws InvalidKeyException
 * @throws NoSuchAlgorithmException
 * @throws NoSuchPaddingException
 * @throws InvalidKeySpecException
 * @throws InvalidParameterSpecException
 */
private List<String> encrypt(String payload) throws IllegalBlockSizeException, BadPaddingException,
        UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeySpecException, InvalidParameterSpecException {
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    byte[] salt = new byte[9];
    random.nextBytes(salt);
    cipher.init(Cipher.ENCRYPT_MODE, getCiperKey(salt));
    AlgorithmParameters params = cipher.getParameters();
    List<String> encrypted = new ArrayList<String>();
    encrypted.add(new String(Base64.encodeBase64(salt)));
    encrypted.add(new String(Base64.encodeBase64(params.getParameterSpec(IvParameterSpec.class).getIV())));
    encrypted.add(new String(Base64.encodeBase64(cipher.doFinal(payload.getBytes("UTF-8")))));
    return encrypted;
}

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