Coverage for d7a/system_files/security_key.py: 74%

19 statements  

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1# 

2# Copyright (c) 2015-2021 University of Antwerp, Aloxy NV. 

3# 

4# This file is part of pyd7a. 

5# See https://github.com/Sub-IoT/pyd7a for further info. 

6# 

7# Licensed under the Apache License, Version 2.0 (the "License"); 

8# you may not use this file except in compliance with the License. 

9# You may obtain a copy of the License at 

10# 

11# http://www.apache.org/licenses/LICENSE-2.0 

12# 

13# Unless required by applicable law or agreed to in writing, software 

14# distributed under the License is distributed on an "AS IS" BASIS, 

15# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

16# See the License for the specific language governing permissions and 

17# limitations under the License. 

18# 

19import struct 

20 

21from d7a.support.schema import Validatable, Types 

22from d7a.system_files.file import File 

23from d7a.system_files.system_file_ids import SystemFileIds 

24 

25 

26class SecurityKeyFile(File, Validatable): 

27 

28 SCHEMA = [{ 

29 "key": Types.BITS(length=128) 

30 }] 

31 

32 def __init__(self, key=0): 

33 self.key = key 

34 Validatable.__init__(self) 

35 File.__init__(self, SystemFileIds.NWL_SECURITY_KEY.value, 16) 

36 

37 @staticmethod 

38 def parse(s, offset=0, length=16): 

39 key = s.read("bytes:16") 

40 return SecurityKeyFile(key=key) 

41 

42 def __iter__(self): 

43 for byte in [(self.key & (0xff << pos * 8)) >> pos * 8 for pos in range(16)]: 

44 yield byte 

45 

46 def __str__(self): 

47 return "key={}".format(self.key)