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utils.py
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utils.py
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import json, ast, hmac, hashlib
from collections import OrderedDict
def change_spf(json_file, values, sid, seed):
# Reads the file
json_data = open(json_file, encoding="utf-8")
data = json.load(json_data, object_pairs_hook=OrderedDict)
json_data.close()
modifyDict(data, values.split('%'))
temp = OrderedDict(sorted(data.items()))
data = temp
HMAChelper(data['protection']['macs'], data, "", values.split('%'), sid, seed)
# Calculates and sets the super_mac
super_msg = sid + json.dumps(data['protection']['macs']).replace(" ", "")
hash_obj = hmac.new(seed, super_msg.encode("utf-8"), hashlib.sha256)
print('super_mac (BEFORE): {}'.format(data['protection']['super_mac']))
print('super_mac (AFTER): {}'.format(hash_obj.hexdigest().upper()))
def removeEmpty(d):
if type(d) == type(OrderedDict()):
t = OrderedDict(d)
for x, y in t.items():
if type(y) == (type(OrderedDict())):
if len(y) == 0:
del d[x]
else:
removeEmpty(y)
if len(y) == 0:
del d[x]
elif(type(y) == type({})):
if(len(y) == 0):
del d[x]
else:
removeEmpty(y)
if len(y) == 0:
del d[x]
elif (type(y) == type([])):
if (len(y) == 0):
del d[x]
else:
removeEmpty(y)
if len(y) == 0:
del d[x]
else:
if (not y) and (y not in [False, 0]):
del d[x]
elif type(d) == type([]):
for x, y in enumerate(d):
if type(y) == type(OrderedDict()):
if len(y) == 0:
del d[x]
else:
removeEmpty(y)
if len(y) == 0:
del d[x]
elif (type(y) == type({})):
if (len(y) == 0):
del d[x]
else:
removeEmpty(y)
if len(y) == 0:
del d[x]
elif (type(y) == type([])):
if (len(y) == 0):
del d[x]
else:
removeEmpty(y)
if len(y) == 0:
del d[x]
else:
if (not y) and (y not in [False, 0]):
del d[x]
def calculateHMAC(value_as_string, path, sid, seed):
if ((type(value_as_string) == type({})) or (type(value_as_string) == type(OrderedDict()))):
removeEmpty(value_as_string)
message = sid + path + json.dumps(value_as_string, separators=(',', ':'), ensure_ascii=False).replace('<', '\\u003C').replace(
'\\u2122', '™')
hash_obj = hmac.new(seed, message.encode("utf-8"), hashlib.sha256)
return hash_obj.hexdigest().upper()
def HMAChelper(macs, value, path, arg, sid, seed, extension=False):
if isinstance(value,OrderedDict):
if(arg[0] in value):
if arg[0] in macs:
path += arg[0] + "."
macs[arg[0]] = HMAChelper(macs[arg[0]], value[arg[0]] ,path, arg[1:], sid, seed)
else:
if not extension:
macs = HMAChelper(macs, value[arg[0]], path, arg[1:], sid, seed, extension=value)
else:
macs = HMAChelper(macs, value[arg[0]], path, arg[1:], sid, seed, extension)
return macs
elif(arg[0] in macs):
del macs[arg[0]]
return macs
else:
if len(arg)>2:
HMAChelper(macs, value[arg[0]] ,path, arg[1:], sid, seed)
elif len(arg)==2:
if arg[0] in value:
path += arg[0] + "."
print('Before: {}'.format(macs))
macs = calculateHMAC(value[arg[0]], path[:-1], sid, seed)
else:
print('Before: {}'.format(macs))
if extension:
value = extension
macs = calculateHMAC(value, path[:-1], sid, seed)
else:
# print('Before: {}'.format(macs))
macs = calculateHMAC(value,path[:-1], sid, seed)
# print('After : {}'.format(macs))
return macs
else:
print('Before: {}'.format(macs))
if extension:
value = extension
macs = calculateHMAC(value, path[:-1], sid, seed)
print('After : {}'.format(macs))
return macs
def modifyDict(t, arg):
if arg[0] in ['pinned_tabs']:
if arg[0] in t:
t[arg[0]].append({arg[1]:arg[2]})
else:
t[arg[0]] = {arg[1]:arg[2]}
elif(len(arg) > 2):
if arg[0] in t:
modifyDict(t[arg[0]], arg[1:])
else:
t[arg[0]] = {arg[1]: {}}
modifyDict(t[arg[0]], arg[1:])
if "delete" not in arg:
t[arg[0]] = OrderedDict(sorted(t[arg[0]].items()))
elif(len(arg) == 2):
if(arg[1].lower() == "delete"):
if isinstance(t, list):
if arg[0] in t:
index = t.index(arg[0])
del t[index]
else:
if arg[0] in ['web_accessible_resources','permissions','api','matches','ids']:
if arg[0] in t:
t[arg[0]].append(arg[1])
else:
t[arg[0]] = [arg[1]]
elif arg[0] in ['content_scripts']:
if arg[0] not in t.keys():
t[arg[0]] = []
if arg[1].split('.')[-1] in ['js']:
if t[arg[0]]:
if 'js' in t[arg[0]][0].keys():
t[arg[0]][0]['js'].append(arg[1])
if 'run_at' not in t[arg[0]][0].keys():
t[arg[0]][0]['run_at'] = "document_end"
else:
t[arg[0]].append({'js':[arg[1]],'all_frames':True,'matches':['*://*//*']})
else:
if arg[0] in t:
if isinstance(t[arg[0]],str):
t[arg[0]] = arg[1]
else:
t[arg[0]] = ast.literal_eval(arg[1])
else:
try:
t[arg[0]] = ast.literal_eval(arg[1])
except:
t[arg[0]] = arg[1]