MD5碰撞脚本

0x04 MD5碰撞脚本
授人以鱼不如授人以渔，下面使多线程MD5哈希碰撞脚本，威力巨大。是根据网上代码改编而成，非原创。

# -*- coding: utf-8 -*-
import multiprocessing
import hashlib
import random
import string
import sys
CHARS = string.letters + string.digits
def cmp_md5(substr, stop_event, str_len,. start=0, size=20):
    global CHARS
    while not stop_event.is_set():
        rnds = ''.join(random.choice(CHARS) for _ in range(size))
        md5 = hashlib.md5(rnds)
        value = md5.hexdigest()
        if value[start: start+str_len] == substr:
            print rnds
            stop_event.set()
            '''
            #碰撞双md5
            md5 = hashlib.md5(value)
            if md5.hexdigest()[start: start+str_len] == substr:
                print rnds+ "=>" + value+"=>"+ md5.hexdigest()  + "\n"
                stop_event.set()
            '''
 
if __name__ == '__main__':
    substr = sys.argv[1].strip()
    start_pos = int(sys.argv[2]) if len(sys.argv) > 1 else 0
    str_len = len(substr)
    cpus = multiprocessing.cpu_count()
    stop_event = multiprocessing.Event()
    processes = [multiprocessing.Process(target=cmp_md5, args=(substr,
                                         stop_event, str_len, start_pos))
                 for i in range(cpus)]
    for p in processes:
        p.start()
    for p in processes:
        p.join()

上面脚本注释部分是双MD5碰撞，取消注释然后注释掉16行即可。

使用方法：python md5Crack.py “你要碰撞的字符串” 字符串的起始位置

例如：python md5Crack.py “0e” 0

将产生MD5值为0e开头的字符串。