#-*- coding: utf-8 -*-

# Copyright 2008-2010 Mir Calculate Ltd. http://www.calculate-linux.org
#
#  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.

import sys
import os
import hashlib
import crypt
import string
from random import choice
from base64 import urlsafe_b64encode as b64encode

from cl_print import color_print
import cl_lang

from server.utils import copyDir

tr = cl_lang.lang()
tr.setLocalDomain('cl_lib')
tr.setLanguage(sys.modules[__name__])


class shareServer(color_print):
    """Класс хранения общих методов используемых для настройки сервисов"""

    def __GenCryptSalt__(self):
        """Генерация соли для хеширования пароля (CRYPT)"""
        chars = string.letters + string.digits + "./"
        salt = ""
        for i in range(2):
            salt = salt + choice(chars)
        return salt

    def getHashPasswd(self, password, crypt):
        """Генерация хеша пароля,

        Поддерживаемые алгоритмы шифрования пароля:
        plain, md5, smd5, crypt, sha, ssha
        """
        if not password:
            self.printERROR(_("ERROR") + " getHashPasswd: " +\
                            _("password empty"))
            return False

        hashPwd = ""
        if crypt == "plain":
            hashPwd = password

        elif crypt == "md5":
            h = hashlib.md5(password)
            hashPwd = "{MD5}" + b64encode(h.digest())

        elif crypt == "smd5":
            salt = os.urandom(4)
            h = hashlib.md5(password)
            h.update(salt)
            hashPwd = "{SMD5}" + b64encode(h.digest() + salt)

        elif crypt == "crypt":
            salt = self.__GenCryptSalt__()
            hashPwd = "{CRYPT}" + crypt.crypt(password, salt)

        elif crypt == "sha":
            h = hashlib.sha1(password)
            hashPwd = "{SHA}" + b64encode(h.digest())

        elif crypt == "ssha":
            salt = os.urandom(4)
            h = hashlib.sha1(password)
            h.update(salt)
            hashPwd = "{SSHA}" + b64encode(h.digest() + salt)

        else:
            self.printERROR(_("ERROR") + " getHashPasswd: " +\
                            _("Can not support '%s' crypto algoritm")%crypt)
            return False
        return hashPwd