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| """ Flask Session Cookie Decoder/Encoder """
__author__ = 'Wilson Sumanang, Alexandre ZANNI'
# standard imports
import sys
import zlib
from itsdangerous import base64_decode
import ast
# Abstract Base Classes (PEP 3119)
if sys.version_info[0] < 3: # < 3.0
raise Exception('Must be using at least Python 3')
elif sys.version_info[0] == 3 and sys.version_info[1] < 4: # >= 3.0 && < 3.4
from abc import ABCMeta, abstractmethod
else: # > 3.4
from abc import ABC, abstractmethod
# Lib for argument parsing
import argparse
# external Imports
from flask.sessions import SecureCookieSessionInterface
class MockApp(object):
def __init__(self, secret_key):
self.secret_key = secret_key
if sys.version_info[0] == 3 and sys.version_info[1] < 4: # >= 3.0 && < 3.4
class FSCM(metaclass=ABCMeta):
def encode(secret_key, session_cookie_structure):
""" Encode a Flask session cookie """
try:
app = MockApp(secret_key)
session_cookie_structure = dict(ast.literal_eval(session_cookie_structure))
si = SecureCookieSessionInterface()
s = si.get_signing_serializer(app)
return s.dumps(session_cookie_structure)
except Exception as e:
return "[Encoding error] {}".format(e)
raise e
def decode(session_cookie_value, secret_key=None):
""" Decode a Flask cookie """
try:
if (secret_key == None):
compressed = False
payload = session_cookie_value
if payload.startswith('.'):
compressed = True
payload = payload[1:]
data = payload.split(".")[0]
data = base64_decode(data)
if compressed:
data = zlib.decompress(data)
return data
else:
app = MockApp(secret_key)
si = SecureCookieSessionInterface()
s = si.get_signing_serializer(app)
return s.loads(session_cookie_value)
except Exception as e:
return "[Decoding error] {}".format(e)
raise e
else: # > 3.4
class FSCM(ABC):
def encode(secret_key, session_cookie_structure):
""" Encode a Flask session cookie """
try:
app = MockApp(secret_key)
session_cookie_structure = dict(ast.literal_eval(session_cookie_structure))
si = SecureCookieSessionInterface()
s = si.get_signing_serializer(app)
return s.dumps(session_cookie_structure)
except Exception as e:
return "[Encoding error] {}".format(e)
raise e
def decode(session_cookie_value, secret_key=None):
""" Decode a Flask cookie """
try:
if (secret_key == None):
compressed = False
payload = session_cookie_value
if payload.startswith('.'):
compressed = True
payload = payload[1:]
data = payload.split(".")[0]
data = base64_decode(data)
if compressed:
data = zlib.decompress(data)
return data
else:
app = MockApp(secret_key)
si = SecureCookieSessionInterface()
s = si.get_signing_serializer(app)
return s.loads(session_cookie_value)
except Exception as e:
return "[Decoding error] {}".format(e)
raise e
if __name__ == "__main__":
# Args are only relevant for __main__ usage
## Description for help
parser = argparse.ArgumentParser(
description='Flask Session Cookie Decoder/Encoder',
epilog="Author : Wilson Sumanang, Alexandre ZANNI")
## prepare sub commands
subparsers = parser.add_subparsers(help='sub-command help', dest='subcommand')
## create the parser for the encode command
parser_encode = subparsers.add_parser('encode', help='encode')
parser_encode.add_argument('-s', '--secret-key', metavar='<string>',
help='Secret key', required=True)
parser_encode.add_argument('-t', '--cookie-structure', metavar='<string>',
help='Session cookie structure', required=True)
## create the parser for the decode command
parser_decode = subparsers.add_parser('decode', help='decode')
parser_decode.add_argument('-s', '--secret-key', metavar='<string>',
help='Secret key', required=False)
parser_decode.add_argument('-c', '--cookie-value', metavar='<string>',
help='Session cookie value', required=True)
## get args
args = parser.parse_args()
## find the option chosen
if (args.subcommand == 'encode'):
if (args.secret_key is not None and args.cookie_structure is not None):
print(FSCM.encode(args.secret_key, args.cookie_structure))
elif (args.subcommand == 'decode'):
if (args.secret_key is not None and args.cookie_value is not None):
print(FSCM.decode(args.cookie_value, args.secret_key))
elif (args.cookie_value is not None):
print(FSCM.decode(args.cookie_value))
#解密：python flask_session_cookie_manager3.py decode -s “secret_key” -c “需要解密的session值”
#加密：python flask_session_cookie_manager3.py encode -s “secret_key” -t “需要加密的session值”
|
