Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_encryption.py: 26%

1###### Coverage stub 

2import atexit 

3import coverage 

4cov = coverage.coverage(data_file='.coverage', cover_pylib=True) 

5cov.start() 

6# Register an exist handler that will print coverage 

7def exit_handler(): 

8 cov.stop() 

9 cov.save() 

10atexit.register(exit_handler) 

11####### End of coverage stub 

12#!/usr/bin/python3 

13# Copyright 2023 Google LLC 

14# 

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

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

17# You may obtain a copy of the License at 

18# 

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

20# 

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

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

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

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

25# limitations under the License. 

26 

27import atheris 

28import sys 

29from io import BytesIO 

30 

31with atheris.instrument_imports(): 

32 from pypdf import PdfWriter, PdfReader 

33 from pypdf.generic import AnnotationBuilder 

34 

35 

36@atheris.instrument_func 

37def TestInputOne(data): 

38 fdp = atheris.FuzzedDataProvider(data) 

39 

40 try: 

41 dummy = BytesIO() 

42 writer = PdfWriter() 

43 

44 # Construct PDF 

45 writer.add_metadata({ 

46 f"/X{fdp.ConsumeUnicodeNoSurrogates(100)}": fdp.ConsumeUnicodeNoSurrogates(100) 

47 }) 

48 rect = (10, 20, 30, 40) 

49 writer.add_annotation(page_number=0, 

50 annotation=AnnotationBuilder.link( 

51 url=f"{fdp.ConsumeUnicodeNoSurrogates(100)}.com", 

52 rect=rect 

53 )) 

54 # Encrypt 

55 key = fdp.ConsumeUnicodeNoSurrogates(sys.maxsize) 

56 writer.encrypt(key, algorithm="AES-256") 

57 writer.write(dummy) 

58 

59 # Read Dummy PDF 

60 reader = PdfReader(dummy) 

61 

62 if not reader.is_encrypted: 

63 raise Exception("Encryption error. Failed to encrypt stream") 

64 

65 # Decrypt 

66 reader.decrypt(key) 

67 

68 if reader.stream == dummy: 

69 raise Exception("Decryption error. Original stream != Decrypted stream") 

70 

71 except Exception: 

72 return 

73 

74 

75if __name__ == '__main__': 

76 atheris.Setup(sys.argv, TestInputOne) 

77 atheris.Fuzz()