Example usage for java.security Key getAlgorithm

Introduction

In this page you can find the example usage for java.security Key getAlgorithm.

Prototype

public String getAlgorithm();

Source Link

Document

Returns the standard algorithm name for this key.

Usage

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

private void loadSecretKey(File encryptedSecretKeyFile, char[] password) {
    try {/*w w w  .  j a va2 s  .c o 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);
    }
}

From source file:pt.lunacloud.services.storage.internal.crypto.EncryptionUtils.java

/**
 * Encrypts a symmetric key using the provided encryption materials and returns
 * it in raw byte array form./* w ww.ja v a  2s  . c  o m*/
 */
public static byte[] getEncryptedSymmetricKey(SecretKey toBeEncrypted, EncryptionMaterials materials,
        Provider cryptoProvider) {
    Key keyToDoEncryption;
    if (materials.getKeyPair() != null) {
        // Do envelope encryption with public key from key pair
        keyToDoEncryption = materials.getKeyPair().getPublic();
    } else {
        // Do envelope encryption with symmetric key
        keyToDoEncryption = materials.getSymmetricKey();
    }
    try {
        Cipher cipher;
        byte[] toBeEncryptedBytes = toBeEncrypted.getEncoded();
        if (cryptoProvider != null) {
            cipher = Cipher.getInstance(keyToDoEncryption.getAlgorithm(), cryptoProvider);
        } else {
            cipher = Cipher.getInstance(keyToDoEncryption.getAlgorithm()); // Use default JCE Provider
        }
        cipher.init(Cipher.ENCRYPT_MODE, keyToDoEncryption);
        return cipher.doFinal(toBeEncryptedBytes);
    } catch (Exception e) {
        throw new LunacloudClientException("Unable to encrypt symmetric key: " + e.getMessage(), e);
    }
}

From source file:pt.lunacloud.services.storage.internal.crypto.EncryptionUtils.java

/**
 * Decrypts an encrypted symmetric key using the provided encryption materials and returns
 * it as a SecretKey object./*from  w  w  w.  j av  a  2s .com*/
 */
private static SecretKey getDecryptedSymmetricKey(byte[] encryptedSymmetricKeyBytes,
        EncryptionMaterials materials, Provider cryptoProvider) {
    Key keyToDoDecryption;
    if (materials.getKeyPair() != null) {
        // Do envelope decryption with private key from key pair
        keyToDoDecryption = materials.getKeyPair().getPrivate();
    } else {
        // Do envelope decryption with symmetric key
        keyToDoDecryption = materials.getSymmetricKey();
    }
    try {
        Cipher cipher;
        if (cryptoProvider != null) {
            cipher = Cipher.getInstance(keyToDoDecryption.getAlgorithm(), cryptoProvider);
        } else {
            cipher = Cipher.getInstance(keyToDoDecryption.getAlgorithm());
        }
        cipher.init(Cipher.DECRYPT_MODE, keyToDoDecryption);
        byte[] decryptedSymmetricKeyBytes = cipher.doFinal(encryptedSymmetricKeyBytes);
        return new SecretKeySpec(decryptedSymmetricKeyBytes, JceEncryptionConstants.SYMMETRIC_KEY_ALGORITHM);
    } catch (Exception e) {
        throw new LunacloudClientException(
                "Unable to decrypt symmetric key from object metadata : " + e.getMessage(), e);
    }
}

From source file:uk.gov.hmrc.mobiletokenproxy.aes.Decrypter.java

protected String decrypt(String data, Key key) {
    return decrypt(data, key, key.getAlgorithm());
}

From source file:uk.gov.hmrc.mobiletokenproxy.aes.Decrypter.java

protected byte[] decryptAsBytes(String data, Key key) {
    return decryptAsBytes(data, key, key.getAlgorithm());
}

From source file:uk.gov.hmrc.mobiletokenproxy.aes.Encrypter.java

protected String encrypt(byte[] data, Key key) {
    return encrypt(data, key, key.getAlgorithm());
}

From source file:uk.gov.hmrc.mobiletokenproxy.aes.Encrypter.java

protected String encrypt(String data, Key key) {
    return encrypt(data.getBytes(StandardCharsets.UTF_8), key, key.getAlgorithm());
}