def hash_string(cls, str_):

        """

        Cryptographic function used for password hashing based on pybcrypt

        or pycrypto in windows

        :param password: password to hash

        """

        if __platform__ in PLATFORM_WIN:

            return sha256(str_).hexdigest()

        elif __platform__ in PLATFORM_OTHERS:

            return bcrypt.hashpw(str_, bcrypt.gensalt(10))

        else:

            raise Exception('Unknown or unsupported platform %s' % __platform__)

    @classmethod

    def hash_check(cls, password, hashed):

        """

        Checks matching password with it's hashed value, runs different

        implementation based on platform it runs on

        :param password: password

        :param hashed: password in hashed form

        """

            return sha256(password).hexdigest() == hashed

            return bcrypt.hashpw(password, hashed) == hashed

        else:

            raise Exception('Unknown or unsupported platform %s' % __platform__)

def get_crypt_password(password):

    return RhodeCodeCrypto.hash_string(password)

def check_password(password, hashed):

    return RhodeCodeCrypto.hash_check(password, hashed)

def authfunc(environ, username, password):

    """

    Dummy authentication function used in Mercurial/Git/ and access control,

    :param environ: needed only for using in Basic auth

    """

    return authenticate(username, password)

def authenticate(username, password):

    """

    Authentication function used for access control,

    firstly checks for db authentication then if ldap is enabled for ldap