// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (c) 2012-2014 Monty Program Ab
// Copyright (c) 2015-2021 MariaDB Corporation Ab

package org.mariadb.jdbc.plugin.authentication.addon;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import org.mariadb.jdbc.Configuration;
import org.mariadb.jdbc.client.Context;
import org.mariadb.jdbc.client.ReadableByteBuf;
import org.mariadb.jdbc.client.socket.Reader;
import org.mariadb.jdbc.client.socket.Writer;
import org.mariadb.jdbc.plugin.AuthenticationPlugin;

/** Clear password plugin. */
public class ClearPasswordPlugin implements AuthenticationPlugin {
  /** plugin name */
  public static final String TYPE = "mysql_clear_password";

  private String authenticationData;

  @Override
  public String type() {
    return TYPE;
  }

  public void initialize(String authenticationData, byte[] authData, Configuration conf) {
    this.authenticationData = authenticationData;
  }

  /**
   * Send password in clear text to server.
   *
   * @param out out stream
   * @param in in stream
   * @param context context
   * @return response packet
   * @throws IOException if socket error
   */
  public ReadableByteBuf process(Writer out, Reader in, Context context) throws IOException {
    if (authenticationData == null) {
      out.writeEmptyPacket();
    } else {
      byte[] bytePwd = authenticationData.getBytes(StandardCharsets.UTF_8);
      out.writeBytes(bytePwd);
      out.writeByte(0);
      out.flush();
    }

    return in.readReusablePacket();
  }
}