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data_flow.py
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data_flow.py
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#!/usr/bin/env python
import re, os, sys, string
class MethodItem:
def __init__(self):
self.path=""
self.listInstruction=[]
class result:
def __init__(self):
sink = ""
source = ""
detail = ""
path=""
def extract_register_index_out_splitted_values(registers_raw_list_splitted):
"""
@param : registers_raw_list_splitted : a list of registers still containing the 'v' prefix [' v1 ', ' v2 ' ...]
@rtype : an ordered list of register indexes ['1', '2' ...]
"""
relevant_registers = []
# Trim the values
registers_raw_list_splitted[:] = (value.strip() for value in registers_raw_list_splitted if len(value) > 0)
for value in registers_raw_list_splitted:
# Remove that 'v'
p_register_index_out_of_split = re.compile('^v([0-9]+)$')
if p_register_index_out_of_split.match(value):
# print p_register_index_out_of_split.match(value).groups()
register_index = p_register_index_out_of_split.match(value).groups()[0]
relevant_registers.append(register_index)
else:
relevant_registers.append('N/A')
return relevant_registers
def relevant_registers_for_the_method(current_instruction):
"""
@param method : a method instance
@param index_to_find : index of the matching method
@rtype : an ordered list of register indexes related to that method call
"""
relevant_registers = []
p_invoke_name = re.compile('^invoke-(?:static|virtual|direct|super|interface|interface-range|virtual-quick|super-quick).*')
p_invoke_range_name = re.compile('^invoke-(?:static|virtual|direct|super|interface|interface-range|virtual-quick|super-quick)(?:\/range).*')
if p_invoke_name.match(current_instruction):
p_invoke_registers = re.compile('(v[0-9]+),')
if p_invoke_registers.findall(current_instruction):
registers_raw_list_splitted = p_invoke_registers.findall(current_instruction)
relevant_registers = extract_register_index_out_splitted_values(registers_raw_list_splitted)
if p_invoke_range_name.match(current_instruction):
# We're facing implicit an implicit range declaration, for instance "invoke v19..v20"
p_invoke_registers_range = re.compile('^.*v([0-9]+) .. v([0-9]+), L.*$')
if p_invoke_registers_range.match(current_instruction):
register_start_number = p_invoke_registers_range.match(current_instruction).groups()[0]
register_end_number = p_invoke_registers_range.match(current_instruction).groups()[1]
if int(register_start_number) > int(register_end_number):
xx=1
else:
relevant_registers = [str(i) for i in xrange(int(register_start_number), int(register_end_number)+1)]
# +1 because range does not provide the higher boundary value
return relevant_registers
def find_register_value(method, index, registers_found):
p_const = re.compile('^const(?:\/4|\/16|\/high16|-wide(?:\/16|\/32)|-wide\/high16|)? v([0-9]+), (.*)$')
p_const_string = re.compile('^const-string(?:||\/jumbo) v([0-9]+), (?:\'|\")(.*)(?:\"|\')$')
p_move = re.compile('^move(?:|\/from16|-wide(?:\/from16|\/16)|-object(?:|\/from16|\/16))? v([0-9]+), v([0-9]+)$')
p_invoke = re.compile('^invoke-.*$')
p_invoke_static = re.compile('^invoke-static.*')
p_move_result = re.compile('^move(?:-result(?:|-wide|-object)|-exception)? v([0-9]+)$')
p_new_instance = re.compile('^new-instance v([0-9]+), (L(?:.*);)$')
result=0
if p_invoke.match(method[index]):
old = ""
relevant_registers = relevant_registers_for_the_method(method[index])
if p_move_result.match(method[index+1]):
register_number = p_move_result.match(method[index+1]).groups()[0]
else:
register_number = relevant_registers[0]
instmp = method[index]
instmp = instmp.replace(instmp[instmp.index("("):instmp.index(")")+1], "())", 1)
if p_invoke_static.match(method[index]):
istart = 0
else:
istart = 1
number = len(relevant_registers)
for i in range(istart, number, 1):
register = relevant_registers[i]
if registers_found.has_key(register):
if i +1 != number:
instmp = instmp.replace("))", registers_found[register]+", ))", 1)
else:
instmp = instmp.replace("))", registers_found[register] + "))", 1)
else:
if i +1 != number:
instmp = instmp.replace("))", "v" + register+", ))", 1)
else:
instmp = instmp.replace("))", "v" + register + "))", 1)
instmp = instmp.replace("))", ")", 1)
new = instmp[instmp.index(">") + 1:]
result = new
if registers_found.has_key(register_number):
old = registers_found[register_number]
if "sink" in new:
new = new[:new.index("~sink")]
if old:
registers_found[register_number] = new + " | " + old
else:
registers_found[register_number] = new
if p_new_instance.match(method[index]):
register_number = p_new_instance.match(method[index]).groups()[0]
register_value = p_new_instance.match(method[index]).groups()[1]
registers_found[register_number] = register_value
if p_const.match(method[index]):
register_number = p_const.match(method[index]).groups()[0]
register_value = p_const.match(method[index]).groups()[1]
registers_found[register_number] = register_value
if p_const_string.match(method[index]):
register_number = p_const_string.match(method[index]).groups()[0]
register_value = '"'+p_const_string.match(method[index]).groups()[1]+'"'
registers_found[register_number] = register_value
if p_move.match(method[index]):
register_number = p_move.match(method[index]).groups()[0]
register_number1 = p_move.match(method[index]).groups()[1]
if registers_found.has_key(register_number1):
registers_found[register_number] = registers_found[register_number1]
else:
registers_found[register_number] = "v"+register_number1
return result
def get_method_diff(dumpfolder):
if sys.platform == "linux" or sys.platform == "linux2":
end = '\r\n'
numend=2
elif sys.platform == "win32":
end = '\n'
numend=1
MethodDiff=[]
filesink = open('./Ouput_CatSinks.txt')
filesource = open('./Ouput_CatSources.txt')
for root, dirs, files in os.walk("./" + dumpfolder, topdown=False):
for name in files:
print(os.path.join(root, name))
with open(os.path.join(root, name)) as codefile:
tmp = MethodItem()
tmp.path = os.path.join(root, name)
check=0
for line in codefile:
t = ""
if line[:-numend]:
if line.split()[0][0].isalpha():
for linesink in filesink:
if linesink.endswith(":"+end):
type = linesink[:-numend-1]
elif linesink[:-1] in line[:-1]:
t = line[4:-1] + "~sink" + ":" + type + "@@"
tmp.listInstruction.append(t)
check=1
break
filesink.seek(0, 0)
if t=="":
for linesource in filesource:
if linesource.endswith(":"+end):
type = linesource[:-numend-1]
elif linesource[:-numend] in line[:-numend]:
t = line[4:-numend] + "~source" + ":" + type + "@"
tmp.listInstruction.append(t)
check=1
break
filesource.seek(0, 0)
if t == "":
tmp.listInstruction.append(line[4:-numend])
if check:
MethodDiff.append(tmp)
return MethodDiff
def data_flow(dumpfolder):
listmethod = get_method_diff(dumpfolder)
list_result = []
for file in listmethod:
method = file.listInstruction
k=0
registers_found = {}
while(k < len(method)):
if "{" in method[k]:
method[k] = method[k].replace("{","")
method[k] = method[k].replace("}","")
t = find_register_value(method, k, registers_found)
if "sink" in method[k]:
instmp = t
if "source" in instmp:
tmpresult = result()
tmpresult.path = file.path
tmpresult.detail = instmp
tmpresult.sink = instmp[instmp.index("sink:"):instmp.index("@@")]
tmpresult.source = instmp[instmp.index("source:"):instmp.index("@")]
list_result.append(tmpresult)
k = k + 1
return list_result