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1#!/usr/bin/env python
2#coding=utf-8
3
4#
5# Copyright (c) 2023 Huawei Device Co., Ltd.
6# Licensed under the Apache License, Version 2.0 (the "License");
7# you may not use this file except in compliance with the License.
8# You may obtain a copy of the License at
9#
10#     http://www.apache.org/licenses/LICENSE-2.0
11#
12# Unless required by applicable law or agreed to in writing, software
13# distributed under the License is distributed on an "AS IS" BASIS,
14# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15# See the License for the specific language governing permissions and
16# limitations under the License.
17#
18
19from .base_rule import BaseRule
20
21class SystemParameterRule(BaseRule):
22    RULE_NAME = "NO-Config-SystemParameter-In-INIT"
23    CONFIG_DAC_MAX_NUM = 200
24
25    def _check_param_name(self, param_name, empty_flag):
26        # len: (0, 96]
27        # Only allow alphanumeric, plus '.', '-', '@', ':', or '_'/
28        # Don't allow ".." to appear in a param name
29        if len(param_name) > 96 or len(param_name) < 1 or param_name[0] == '.' or '..' in param_name:
30            return False
31
32        if empty_flag is False:
33            if param_name[-1] == '.':
34                return False
35
36        if param_name == "#":
37            return True
38
39        for char_value in param_name:
40            if char_value in '._-@:':
41                continue
42
43            if char_value.isalnum():
44                continue
45            return False
46        return True
47
48    def _check_Param_in_init(self):
49        passed = True
50        value_empty_flag = True
51        white_list =self.get_white_lists()
52        parser = self.get_mgr().get_parser_by_name('system_parameter_whitelist')
53        counts = 0
54        for key, item in parser._parameters.items():
55            if (item.get("dacMode") != 0):
56                counts += 1
57            if str(item)[-1] == "=":
58                value_empty_flag = True
59            else:
60                value_empty_flag = False
61
62            if not self._check_param_name(key, value_empty_flag):
63                self.error("Invalid param: %s" % key)
64                continue
65            if key in white_list:
66                continue
67        if counts > SystemParameterRule.CONFIG_DAC_MAX_NUM:
68            self.error("DAC overallocated memory")
69            passed = False
70        return passed
71
72    def __check__(self):
73        return self._check_Param_in_init()
74