Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_connection.py: 67%

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 2022 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 sys 

28import atheris 

29import threading 

30import socket 

31import time 

32 

33import configparser 

34import pymysql 

35from pymysql import connections, constants 

36 

37 

38fuzzed_input = b"" 

39 

40# somehow ugly as fuzzing cannot be run in parallel 

41def SetFuzzedInput(input_bytes): 

42 global fuzzed_input 

43 fuzzed_input = input_bytes 

44 

45class ServerThread(threading.Thread): 

46 def __init__(self): 

47 self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 

48 self.s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 

49 self.s.bind(("127.0.0.1", 8001)) 

50 self.s.listen(1) 

51 

52 threading.Thread.__init__(self) 

53 

54 def run(self): 

55 global fuzzed_input 

56 conn, addr = self.s.accept() 

57 conn.settimeout(0.3) 

58 try: 

59 conn.recv(1024) 

60 except: 

61 pass 

62 conn.send(fuzzed_input) 

63 time.sleep(0.005) 

64 conn.close() 

65 self.s.shutdown(1) 

66 self.s.close() 

67 time.sleep(0.01) 

68 

69 

70def TestOneInput(data): 

71 fdp = atheris.FuzzedDataProvider(data) 

72 local_config_file = "/tmp/my.cnf" 

73 with open(local_config_file, "w") as cfg: 

74 cfg.write(fdp.ConsumeUnicodeNoSurrogates(1024)) 

75 

76 # Catch config parser errors 

77 try: 

78 c = connections.Connection( 

79 db=None, 

80 read_default_file=local_config_file, 

81 ssl_disabled=True, 

82 defer_connect=True 

83 ) 

84 except configparser.Error: 

85 return 

86 c.port = 8001 

87 c.host = "127.0.0.1" 

88 

89 SetFuzzedInput(fdp.ConsumeBytes(512)) 

90 t1 = ServerThread() 

91 t1.start() 

92 

93 try: 

94 c.connect(sock=None) 

95 except pymysql.err.MySQLError: 

96 pass 

97 t1.join() 

98 

99 

100def main(): 

101 atheris.instrument_all() 

102 atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True) 

103 atheris.Fuzz() 

104 

105 

106if __name__ == "__main__": 

107 main()