fr.cph.stock.security.SecurityServiceImpl.java Source code

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Here is the source code for fr.cph.stock.security.SecurityServiceImpl.java

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/**
 * Copyright 2017 Carl-Philipp Harmant
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 fr.cph.stock.security;

import org.apache.commons.codec.binary.Hex;
import org.springframework.stereotype.Component;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

/**
 * Class that takes care of encoding password and generate salt
 *
 * @author Carl-Philipp Harmant
 */
@Component
public class SecurityServiceImpl implements SecurityService {

    /**
     * Encode to sha256 the user password
     *
     * @param str the password to encode
     * @return an encoded string
     * @throws NoSuchAlgorithmException     the NoSuchAlgorithmException
     * @throws UnsupportedEncodingException the UnsupportedEncodingException
     */
    @Override
    public String encodeToSha256(final String str) throws NoSuchAlgorithmException, UnsupportedEncodingException {
        final MessageDigest digest = MessageDigest.getInstance("SHA-256");
        final byte[] hash = digest.digest(str.getBytes("UTF-8"));
        return Hex.encodeHexString(hash);
    }

    /**
     * Generate a salt, a random key, en encrypt it
     *
     * @return a key encrypted
     * @throws NoSuchAlgorithmException     the NoSuchAlgorithmException
     * @throws UnsupportedEncodingException the UnsupportedEncodingException
     */
    @Override
    public String generateSalt() throws NoSuchAlgorithmException, UnsupportedEncodingException {
        final SecureRandom random = new SecureRandom();
        return encodeToSha256(random.toString());
    }
}