def keytype_identity(keytype):
    """
    Get the keyring identity from keyring type.

    This is used in authentication with keyrings and generating keyrings.
    """
    ident_dict = {
        'admin' : 'client.admin',
        'mds' : 'client.bootstrap-mds',
        'osd' : 'client.bootstrap-osd',
        'rgw' : 'client.bootstrap-rgw',
        'mon' : 'mon.'
    }
    return ident_dict.get(keytype, None)