content: /**
   * JBoss, Home of Professional Open Source
   * Copyright Red Hat, Inc., and individual contributors.
   *
   * 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.jboss.aerogear.unifiedpush.auth;
  
  
  import javax.servlet.http.HttpServletRequest;
  import java.nio.charset.StandardCharsets;
  import java.util.Base64;
  
  
  public final class HttpBasicHelper {
  
      private static final String HTTP_BASIC_SCHEME = "Basic ";
  
      private HttpBasicHelper() {
      }
  
      private static boolean isBasic(final String authorizationHeader) {
          return authorizationHeader.startsWith(HTTP_BASIC_SCHEME);
      }
  
      private static String getAuthorizationHeader(final HttpServletRequest request) {
          return request.getHeader("Authorization");
      }
  
      public static String[] extractUsernameAndPasswordFromBasicHeader(final HttpServletRequest request) {
          String username = "";
          String password = "";
          final String authorizationHeader = getAuthorizationHeader(request);
  
          if (authorizationHeader != null && isBasic(authorizationHeader)) {
              final String base64Token = authorizationHeader.substring(HTTP_BASIC_SCHEME.length());
              final String token = new String(Base64.getDecoder().decode(base64Token), StandardCharsets.UTF_8);
  
              final int delimiter = token.indexOf(':');
  
              if (delimiter != -1) {
                  username = token.substring(0, delimiter);
                  password = token.substring(delimiter + 1);
              }
          }
          return new String[] { username, password };
      }
  }
  