SdkTokenGenerator.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * 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 org.kaaproject.kaa.server.common.dao.service;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.StringUtils;
import org.kaaproject.kaa.common.dto.DtoByteMarshaller;
import org.kaaproject.kaa.common.dto.admin.SdkProfileDto;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SdkTokenGenerator {

  private static final String SDK_TOKEN_HASH_ALGORITHM = "SHA1";

  private SdkTokenGenerator() {
  }

  /**
   * Generates the SDK token.
   *
   * @param sdkProfileDto SDK profile
   */
  public static void generateSdkToken(SdkProfileDto sdkProfileDto) {
    if (StringUtils.isEmpty(sdkProfileDto.getToken())) {
      try {
        MessageDigest messageDigest = MessageDigest.getInstance(SDK_TOKEN_HASH_ALGORITHM);
        messageDigest.update(DtoByteMarshaller.toBytes(sdkProfileDto.toSdkTokenDto()));
        sdkProfileDto.setToken(Base64.encodeBase64URLSafeString(messageDigest.digest()));
      } catch (NoSuchAlgorithmException ex) {
        throw new RuntimeException(ex);
      }
    }
  }

}