/*  Copyright (c) 2015, 2023, Oracle and/or its affiliates.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License, version 2.0,
    as published by the Free Software Foundation.

    This program is also distributed with certain software (including
    but not limited to OpenSSL) that is licensed under separate terms,
    as designated in a particular file or component or in included license
    documentation.  The authors of MySQL hereby grant you an additional
    permission to link the program and your derivative works with the
    separately licensed software that they have included with MySQL.

    This program 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 General Public License, version 2.0, for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */

#include "m_ctype.h"  /* my_charset_utf8_bin */
#include "my_dbug.h"   /* assert */
#include <mysqld_error.h> /* To get ER_NOT_VALID_PASSWORD */
#include <mysql/plugin_validate_password.h> /* validate_password plugin */

#include "strfunc.h"
#include "sql_string.h"
#include "sql_plugin.h"


LEX_CSTRING validate_password_plugin= {
  C_STRING_WITH_LEN("validate_password")
};

/**
  Validate the input password based on defined policies.

  @param password        password which needs to be validated against the
                         defined policies
  @param password_len    length of password

  @retval 0 ok
  @retval 1 ERROR;
*/

int my_validate_password_policy(const char *password, unsigned int password_len)
{
  plugin_ref plugin;
  String password_str;

  if (password)
  {
    String tmp_str(password, password_len, &my_charset_utf8_bin);
    password_str= tmp_str;
  }
  plugin= my_plugin_lock_by_name(0, validate_password_plugin,
                                 MYSQL_VALIDATE_PASSWORD_PLUGIN);
  if (plugin)
  {
    st_mysql_validate_password *password_validate=
                      (st_mysql_validate_password *) plugin_decl(plugin)->info;

    if (!password_validate->validate_password(&password_str))
    {
      my_error(ER_NOT_VALID_PASSWORD, MYF(0));
      plugin_unlock(0, plugin);
      return (1);
    }
    plugin_unlock(0, plugin);
  }
  return (0);
}


/* called when new user is created or exsisting password is changed */
int my_calculate_password_strength(const char *password, unsigned int password_len)
{
  int res= 0;
  assert(password != NULL);

  String password_str;
  if (password)
    password_str.set(password, password_len, &my_charset_utf8_bin);
  plugin_ref plugin= my_plugin_lock_by_name(0, validate_password_plugin,
                                            MYSQL_VALIDATE_PASSWORD_PLUGIN);
  if (plugin)
  {
    st_mysql_validate_password *password_strength=
                      (st_mysql_validate_password *) plugin_decl(plugin)->info;

    res= password_strength->get_password_strength(&password_str);
    plugin_unlock(0, plugin);
  }
  return(res);
}