net.nicholaswilliams.java.licensing.samples.SampleFilePrivateKeyDataProvider.java Source code

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Here is the source code for net.nicholaswilliams.java.licensing.samples.SampleFilePrivateKeyDataProvider.java

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/*
 * SampleFilePrivateKeyDataProvider.java from LicenseManager modified Thursday, January 24, 2013 16:38:28 CST (-0600).
 *
 * Copyright 2010-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.nicholaswilliams.java.licensing.samples;

import net.nicholaswilliams.java.licensing.encryption.PrivateKeyDataProvider;
import net.nicholaswilliams.java.licensing.exception.KeyNotFoundException;
import org.apache.commons.io.IOUtils;

import java.io.IOException;

/**
 * A sample implementation of the {@link PrivateKeyDataProvider} interface.
 *
 * @author Nick Williams
 * @since 1.0.0
 * @version 1.0.0
 * @see PrivateKeyDataProvider
 */
@SuppressWarnings("unused")
public class SampleFilePrivateKeyDataProvider implements PrivateKeyDataProvider {
    /**
     * This method returns the data from the file containing the encrypted
     * private key from the public/private key pair. The contract for this
     * method can be fulfilled by storing the data in a byte array literal
     * in the source code itself.
     *
     * @return the encrypted file contents from the private key file.
     * @throws KeyNotFoundException if the key data could not be retrieved; an acceptable message or chained cause must be provided.
     */
    public byte[] getEncryptedPrivateKeyData() throws KeyNotFoundException {
        try {
            return IOUtils.toByteArray(this.getClass().getResourceAsStream("sample.private.key"));
        } catch (IOException e) {
            throw new KeyNotFoundException("The private key file was not found.", e);
        }
    }
}