Python简单的CTF题目hash碰撞小脚本

import hashlib

for num in range(0,9999999999):
    res = hashlib.sha1(str(num).encode()).hexdigest()
    if res[0:5] == "903ed":   #对hash的前五位为"903ed"的数字进行碰撞
        print("str:"+str(num)+"  "+"pwd:"+res)
        break
    print(num)