code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2019 Fabian Richter
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  package org.languagetool.server;
  
  import java.nio.ByteBuffer;
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  import java.util.Base64;
  
  public class BasicAuthentication {
    private final String user;
    private final String password;
  
    public BasicAuthentication(String authHeader) {
      if (!authHeader.startsWith("Basic ")) {
        throw new AuthException("Expected Basic Authentication");
      }
      String authEncoded = authHeader.substring("Basic ".length());
      Charset cs = StandardCharsets.UTF_8;
      ByteBuffer authDecodedBytes = ByteBuffer.wrap(Base64.getDecoder().decode(authEncoded.getBytes(cs)));
      String authDecoded = cs.decode(authDecodedBytes).toString();
      String[] authParts = authDecoded.split(":", 2);
      if (authParts.length != 2 || authParts[0].trim().isEmpty() || authParts[1].trim().isEmpty()) {
        throw new AuthException("Expected Basic Authentication");
      }
      user = authParts[0];
      password = authParts[1];
    }
  
    public String getUser() {
      return user;
    }
  
    public String getPassword() {
      return password;
    }
  }
  