intelligent_bruteforce.py

import time
import datetime
import string
import random

pass_len = 8
pwd = ''.join(random.SystemRandom().choice(string.ascii_letters + string.digits + string.punctuation) for _ in range(pass_len))

def check_pw(guess):
    print "Checking " + guess
    r = True
    for i in range(len(guess)):
        time.sleep(0.003)
        if guess[i] != pwd[i]:
            r = False
            break
    if r:
        print "Welcome."
    else:
        print "WRONG!"
    return r

def brute():
    r = False
    s = " "*pass_len
    while r == False:
        for i in range(len(s)):
            t = datetime.timedelta(seconds=0)
            o = " "
            for c in string.ascii_letters + string.digits + string.punctuation:
                q = list(s)
                q[i] = c
                a = datetime.datetime.now()
                l = check_pw("".join(q))
                b = datetime.datetime.now()
                if l:
                    print "FOUND IT! Password is: " + "".join(q)
                    r = True
                    break
                if b-a > t:
                    t = b-a
                    o = c
            v = list(s)
            v[i] = o
            s = "".join(v)

time1 = datetime.datetime.now()
brute()
time2 = datetime.datetime.now()
print "Merely took me " + str(time2-time1) + " to crack the " + str(pass_len) + " character long password " + pwd