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repair dex by fart
import base64
import os
import re
import sys
def parse_ins_bin(ins_path):
with open(ins_path, 'r') as f:
content = f.read()
ins_array=re.findall(r"{name:(.*?),method_idx:(.*?),offset:(.*?),code_item_len:(.*?),ins:(.*?)}", content) #(.*?)最短匹配
code_items = []
for ins in ins_array:
offset=(int)(ins[2])
code_item = base64.b64decode(ins[4])
code_items.append((offset, code_item))
return code_items
def parse_all_ins_bin(ins_dir, keyword):
ins_bins = os.listdir(ins_dir)
ins_bins = [i for i in ins_bins if '.bin' in i and keyword in i]
code_items = []
for ins_bin in ins_bins:
code_items += parse_ins_bin('{}/{}'.format(ins_dir, ins_bin))
return code_items
if __name__ == "__main__":
dex_path = sys.argv[1]
ins_dir = sys.argv[2]
keyword = dex_path.split('/')[-1].split('_')[0]
with open(dex_path, 'rb') as f:
dex = bytearray(f.read())
code_items = parse_all_ins_bin(ins_dir, keyword)
for offset, code_item in code_items:
size = len(code_item)
dex[offset:offset+size] = code_item
output_path = dex_path.replace('.dex', '_repair.dex')
with open(output_path, 'wb') as f:
f.write(dex)
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