Example usage for javax.crypto Cipher UNWRAP_MODE

Introduction

In this page you can find the example usage for javax.crypto Cipher UNWRAP_MODE.

Prototype

int UNWRAP_MODE

To view the source code for javax.crypto Cipher UNWRAP_MODE.

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Document

Constant used to initialize cipher to key-unwrapping mode.

Usage

From source file:org.tolven.security.password.PasswordHolder.java

private void loadSecretKey(File encryptedSecretKeyFile, char[] password) {
    try {/*from  w w  w.  ja  v a2  s.co  m*/
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        FileInputStream in = null;
        try {
            in = new FileInputStream(encryptedSecretKeyFile);
            byte[] bytes = new byte[1024];
            int n = 0;
            while ((n = in.read(bytes)) != -1) {
                baos.write(bytes, 0, n);
            }
        } finally {
            if (in != null) {
                in.close();
            }
        }
        byte[] encryptedSecretKey = Base64.decodeBase64(baos.toByteArray());
        String alias = getKeyStore().aliases().nextElement();
        Key key = getKeyStore().getKey(alias, password);
        Cipher cipher = Cipher.getInstance(key.getAlgorithm());
        cipher.init(Cipher.UNWRAP_MODE, key);
        secretKey = (SecretKey) cipher.unwrap(encryptedSecretKey, "DESede", Cipher.SECRET_KEY);
    } catch (Exception ex) {
        throw new RuntimeException("Could not load secret key from " + encryptedSecretKeyFile.getPath(), ex);
    }
}

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From source file:test.integ.be.fedict.commons.eid.client.JCATest.java

@Test
public void testSoftwareRSAKeyWrapping() throws Exception {
    final KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
    final KeyPair keyPair = keyPairGenerator.generateKeyPair();

    final KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    final SecretKey secretKey = keyGenerator.generateKey();
    LOG.debug("secret key algo: " + secretKey.getAlgorithm());

    final Cipher cipher = Cipher.getInstance("RSA");
    cipher.init(Cipher.WRAP_MODE, keyPair.getPublic());
    LOG.debug("cipher security provider: " + cipher.getProvider().getName());
    LOG.debug("cipher type: " + cipher.getClass().getName());
    final byte[] wrappedKey = cipher.wrap(secretKey);

    cipher.init(Cipher.UNWRAP_MODE, keyPair.getPrivate());
    final Key resultKey = cipher.unwrap(wrappedKey, "AES", Cipher.SECRET_KEY);

    assertArrayEquals(secretKey.getEncoded(), resultKey.getEncoded());

}

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