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How to get output of port scanner program in python to a text file

I am writing a program in python to scan the ports of the host and tell how many of them are open, show the time taken & have also added error handling...
This code is working fine but the problem is it is taking too long to scan all the ports (im talking about the time its taking to generate the full output) like it did not even complete in 1hr, is this normal? or what's wrong here.
secondly, I want the output of this program in a text file... I have tried several methods but none of them did work, one of the methods I tried is written at the end of the code in comment. Any help would be greatly appreciated. Thanks, in advance!
Here's the source code:
#!/usr/bin/env python
import socket
import subprocess
import sys
from datetime import datetime
# Clear the screen
subprocess.call('clear', shell=True)
# Ask for input
remoteServer = input("Enter a remote host to scan: ")
# Using the range function to specify ports (here it will scans all ports between 1 and 1024)
# We also put in some error handling for catching errors
try:
remoteServerIP = socket.gethostbyname(remoteServer)
# Prints a banner with info on which host we are about to scan
print ("-" * 60)
print ("Please wait, scanning remote host", remoteServerIP)
print ("-" * 60)
# Check what time the scan started
t1 = datetime.now()
for port in range(1,1025):
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
result = sock.connect_ex((remoteServerIP, port))
if result == 0:
print ("Port {}: Open".format(port))
sock.close()
except KeyboardInterrupt:
print ("You pressed Ctrl+C")
sys.exit()
except socket.gaierror:
print ('Hostname could not be resolved. Exiting')
sys.exit()
except socket.error:
print ("Host is not available")
sys.exit()
# Checking the time again
t2 = datetime.now()
# Calculates the difference of time, to see how long it took to run the script
total = t2 - t1
# Printing the information to screen
print ('Scanning Completed in: ', total)
'''#Text file
f = open('Hostreport.txt', 'a')
print(port,file=f)
f.close()'''

Two common ways to write simple text to a file in python:
with open('/tmp/foo.txt', 'w') as f:
f.write('first line\n')
f.write('second line\n')
Using open as a context manager means it's only valid within the block and python automatically takes care of ensuring it's properly closed at the end.
Or the classic way:
f = open('/tmp/bar.txt', 'w')
f.write('first line\n')
f.write('second line\n')
f.close()

trying to replace netcat ,, with a python script

I'm reading a book called ( Black Hat Python: Python Programming for Hackers and Pentesters
Book by Justin Seitz)
and I'm doing a project from the book called Replacing Netcat , basically an attempt to replace netcat with a python script ,
I wrote the code identical to the book but its not running properly,,,
** I mean I had to make some obvious changes , cause the book is using python 2.7 , and I'm using Python 3.9.12**
but the code isn't working as it should , according to the book,,,,
this is how the book is telling me to run the code ::- how the book tells me to run the script
me trying to run the code 1st step
me trying to run the code 2nd step
as u can see it gives no output ,, if I try to run it according to the book
and just print's the strings and stops when I write "python3 file_name.py" 2
and stops , it doesn't even execute a single function after that, what am I doing wrong ?
import sys
import socket
import getopt
import threading
import subprocess
# global variables that we fooking need .
listen = False
command = False
upload = False
execute = ""
target = ""
upload_dest = ""
port = 0
def usage():
print ("BHP Net Tool")
print()
print ("Usage: bhpnet.py -t target_host -p port")
print ("""-l --listen - listen on [host]:[port] for ¬
incoming connections""")
print ("""-e --execute=file_to_run - execute the given file upon ¬
receiving a connection""")
print ("-c --command - initialize a command shell")
print ("""-u --upload=destination - upon receiving connection upload a ¬
file and write to [destination]""")
print()
print()
print ("Examples: ")
print ("bhpnet.py -t 192.168.0.1 -p 5555 -l -c")
print ("bhpnet.py -t 192.168.0.1 -p 5555 -l -u=c:\\target.exe")
print ("bhpnet.py -t 192.168.0.1 -p 5555 -l -e=\"cat /etc/passwd\"")
print ("echo 'ABCDEFGHI' | ./bhpnet.py -t 192.168.11.12 -p 135")
sys.exit(0)
def main():
global listen
global port
global execute
global command
global upload_dest
global target
if not len(sys.argv[1:]):
usage()
# read commandline options
try:
opts,args = getopt.getopt(sys.argv[1:],"hle:t:p:cu:",
["help", "listen", "execute", "target", "port", "command", "upload"])
except getopt.GetoptError as err:
print(str(err))
usage()
for o,a in opts:
if o in ("-h", "--help"):
usage()
elif o in ("-l", "--listen"):
listen = True
elif o in ("-e", "--execute"):
execute = a
elif o in ("-c", "commandshell"):
command = True
elif o in ("-u", "--upload"):
upload_dest = a
elif o in ("-t", "--target"):
target = a
elif o in ("-p", "--port"):
port = int(a)
else:
assert False, "Unhandled Option"
#are we going to listen or just send data from stdin ?
if not listen and len(target) and port > 0 :
#read in buffer from the commandline
#this will block , so send CTRL-D if not sending input
#to stdin
buffer = sys.stdin.read()
# send data off
client_sender(buffer)
# we are going to listen and potentially
# upload things , execute commands , and drop a shell back
# depending on our command line options above
if listen:
server_loop()
main()
def client_sender(buffer):
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
# connect to out target host
client.connect((target,port))
if len(buffer):
client.send(buffer)
while True:
# now wait for back
recv_len = 1
response = ""
while recv_len:
data = client.recv(4096)
recv_len = len(data)
response += data
if recv_len < 4096:
break
print(response)
# wait for more input
buffer = input("")
buffer += "\n"
# send it off
client.send(buffer)
except:
print("[*] Exception ! Exiting.")
# tear down the connection
client.close()
def server_loop():
global target
#if no target is defined, we listen on al interfaces
if not len(target):
target = "0.0.0.0"
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind((target,port))
server.listen(5)
while True:
client_socket, addr = server.accept()
# spin off a thread to handel our new client
client_thread = threading.Thread(target=client_handler, args = (client_socket,))
client_thread.start()
def run_command(command):
# trim the newline
command = command.rstrip()
# run the command and get the output back
try:
output = subprocess.check_output(command,stderr = subprocess.STDOUT, shell=True)
except:
output = "Failed to execute command.\r\n"
#send the output back to the client
return output
def client_handler(client_socket):
global upload
global exceute
global command
# check for upload
if len(upload_dest):
# read in all of the bytes and write to our destination
file_buffer = ""
#keep reading data until none is available
while True:
data = client_socket.recv(1024)
if not data:
break
else:
file_buffer += data
# now we take these bytes and try to write them out
try:
file_descriptor = open("upload_dest", "wb")
file_descriptor.write(file_buffer)
file_descriptor.close()
# acknowledge that we wrote the file out
client_socket.send(f"Succesfully saved file to {upload_dest}")
except:
client_socket.send(f"Failed to save file to \r\n{upload_dest}")
# check for command execution
if len(execute):
# run the command
output = run_command(execute)
client_socket.send(output)
# now we go into another loop if a command shell was requested
if command:
while True:
# show a simple prompt
client_socket.send("<BHP:#>")
# now we recive until we see a linefeed ( enter key )
cmd_buffer = ""
while "\n" not in cmd_buffer:
cmd_buffer += client_socket.recv(1024)
# send back the command output
response = run_command(cmd_buffer)
# send back the response
client_socket.send(response)

How is your debugging skill?
I was experiencing the same issue afew days ago & i fixed it by debugging entry points into functions to keep track of the eip while the program is running by printing arguments before any operation as they are being passed between functions .. this helps to check whether the code is producing expected values as it runs ..
in short as this case , the book was written in regards to python2 so most of the errors are going to force you to work on your debugging skills..
i would also advice you to take a short crash course in C programming before taking on the BHP book since alot of system calls like socket getopts are really C apis , check on man 2 and man 3 of whatever you're importing in python to have a broader look on things as you debug most errors ..
managed to fix it up until here ..
download source code link
https://filebin.net/i40e2oisabxqmbys

Enter an ssh password using the standard python library (not pexpect)

Related questions that are essentially asking the same thing, but have answers that don't work for me:
Make python enter password when running a csh script
How to interact with ssh using subprocess module
How to execute a process remotely using python
I want to ssh into a remote machine and run one command. For example:
ssh <user>#<ipv6-link-local-addr>%eth0 sudo service fooService status
The problem is that I'm trying to do this through a python script with only the standard libraries (no pexpect). I've been trying to get this to work using the subprocess module, but calling communicate always blocks when requesting a password, even though I supplied the password as an argument to communicate. For example:
proc = subprocess.Popen(
[
"ssh",
"{testUser1}#{testHost1}%eth0".format(**locals()),
"sudo service cassandra status"],
shell=False,
stdin=subprocess.PIPE)
a, b = proc.communicate(input=testPasswd1)
print "a:", a, "b:", b
print "return code: ", proc.returncode
I've tried a number of variants of the above, as well (e.g., removing "input=", adding/removing subprocess.PIPE assignments to stdout and sterr). However, the result is always the same prompt:
ubuntu#<ipv6-link-local-addr>%eth0's password:
Am I missing something? Or is there another way to achieve this using the python standard libraries?

This answer is just an adaptation of this answer by Torxed, which I recommend you go upvote. It simply adds the ability to capture the output of the command you execute on the remote server.
import pty
from os import waitpid, execv, read, write
class ssh():
def __init__(self, host, execute='echo "done" > /root/testing.txt',
askpass=False, user='root', password=b'SuperSecurePassword'):
self.exec_ = execute
self.host = host
self.user = user
self.password = password
self.askpass = askpass
self.run()
def run(self):
command = [
'/usr/bin/ssh',
self.user+'#'+self.host,
'-o', 'NumberOfPasswordPrompts=1',
self.exec_,
]
# PID = 0 for child, and the PID of the child for the parent
pid, child_fd = pty.fork()
if not pid: # Child process
# Replace child process with our SSH process
execv(command[0], command)
## if we havn't setup pub-key authentication
## we can loop for a password promt and "insert" the password.
while self.askpass:
try:
output = read(child_fd, 1024).strip()
except:
break
lower = output.lower()
# Write the password
if b'password:' in lower:
write(child_fd, self.password + b'\n')
break
elif b'are you sure you want to continue connecting' in lower:
# Adding key to known_hosts
write(child_fd, b'yes\n')
else:
print('Error:',output)
# See if there's more output to read after the password has been sent,
# And capture it in a list.
output = []
while True:
try:
output.append(read(child_fd, 1024).strip())
except:
break
waitpid(pid, 0)
return ''.join(output)
if __name__ == "__main__":
s = ssh("some ip", execute="ls -R /etc", askpass=True)
print s.run()
Output:
/etc:
adduser.conf
adjtime
aliases
alternatives
apm
apt
bash.bashrc
bash_completion.d
<and so on>

How to redirect output of ssh.exec_command to a file in Python paramiko module?

I want to run a python script say test.py on a Linux target machine (which has a python interpreter) and capture the output of the command in a text file as the part of another python script invoke.py using paramiko module.
The statement in the script
stdin, stdout, sterr = ssh.exec_command("python invoke.py > log.txt")
generates a blank file log.txt.
Please suggest corrections / alternate way to do this. to write the output to the file correctly.
test.py when run locally outputs sane text (which is expected to be logged in log.txt).
There are some relevant posts here and here, but no one deals with output of python script

instead of calling client.exec_command() you can use client.open_channel() and use channel session's recv() and recv_stderr() streams to read write stdout/std err:
def sshExecute(hostname, username, password, command, logpath = None):
buffSize = 2048
port = 22
client = paramiko.Transport((hostname, port))
client.connect(username=username, password=password)
if logpath == None:
logpath = "./"
timestamp = int(time.time())
hostname_prefix = "host-%s-%s"%(hostname.replace(".","-"),timestamp)
stdout_data_filename = os.path.join(logpath,"%s.out"%(hostname_prefix))
stderr_data_filename = os.path.join(logpath,"%s.err"%(hostname_prefix))
stdout_data = open(stdout_data_filename,"w")
stderr_data = open(stderr_data_filename,"w")
sshSession = client.open_channel(kind='session')
sshSession.exec_command(command)
while True:
if sshSession.recv_ready():
stdout_data.write(sshSession.recv(buffSize))
if sshSession.recv_stderr_ready():
stderr_data.write(sshSession.recv_stderr(buffSize))
if sshSession.exit_status_ready():
break
stdout_data.close()
stderr_data.close()
sshSession.close()
client.close()
return sshSession.recv_exit_status()
Hope this fully working function helps you

SCP with paramiko, using different remote and local directories

I have a Python code that uses Paramiko.
#!/usr/bin/env python
import paramiko
username = ('user')
password = ('1234')
hostname = ('test-server.com')
ports = 22
localD = ('/var/tmp/testxxxxxxxx.tar.gz')
remoteD = ('/var/tmp/testxxxxxxxx.tar.gz')
paramiko.util.log_to_file('/tmp/paramiko.log')
transport = paramiko.Transport((hostname, ports))
transport.connect(username = username, password = password)
sftp = paramiko.SFTPClient.from_transport(transport)
sftp.put(remotepath=remoteD, localpath=localD)
sftp.close()
transport.close()
With this code, the local-dir and the remote-dir should be equals. if not "file not found"
How can I change or use another remote-dir different to local-dir?
Example:
localD = ('/var/tmp/testxxxxxxxx.tar.gz')
remoteD = ('/home/user/testxxxxxxxx.tar.gz')
Thank you

Since the error message says 'No such file or directory', I'd first check to make sure the directory exists on remote system and is writable by the credentials you're using. The SFTPClient class has all sorts of other methods you can call to verify the existence of target paths and create them if they don't exist yet.
For example, calling the stat() method passing in the destination path should give you back a tuple the same as that returned by os.stat. Try running this script (I just hacked up a little path check routine and dropped it into your script):
#!/usr/bin/env python
import paramiko
username = ('user')
password = ('1234')
hostname = ('test-server.com')
ports = 22
localD = ('/var/tmp/testxxxxxxxx.tar.gz')
remoteD = ('/var/tmp/testxxxxxxxx.tar.gz')
def check(sftp, path):
parts = path.split('/')
for n in range(2, len(parts) + 1):
path = '/'.join(parts[:n])
print 'Path:', path,
sys.stdout.flush()
try:
s = sftp.stat(path)
print 'mode =', oct(s.st_mode)
except IOError as e:
print e
paramiko.util.log_to_file('/tmp/paramiko.log')
transport = paramiko.Transport((hostname, ports))
transport.connect(username = username, password = password)
sftp = paramiko.SFTPClient.from_transport(transport)
check(sftp, remoteD)
sftp.close()
transport.close()
Output should be something like this:
Path: /var mode = 040755
Path: /var/tmp mode = 040700
Path: /var/tmp/testxxxxxxxx.tar.gz [Errno 2] No such file
The mode numbers will most likely differ, but you shouldn't get "No such file" error on any of the parts of the path other than the file name. If you do, then it probably means you need to construct the path down to the point where you want to put the file using sftp.mkdir()

this is sftp, it's not SCP. when connecting to devices which have dropbear (such as those on OpenWRT) there is no sftp sub-system, so sftp fails. instead i use a tar command (paramiko abstracted behind the "connect" function.
i am however looking for actual SCP over paramiko and unfortunately the answer here, which is at the top of a google search, doesn't actually answer the question.
# argh argh argh dropbear on openwrt not compiled with sftp
# have to use some horribleness...
tw = connect(ipaddr, "root", server_root_password, command="tar xvf -",
debug_level=debug_level)
tf = StringIO()
tar = tarfile.open(mode= "w:", fileobj = tf)
taradd(tar, "etc/tinc/....")
taradd(tar, ".....", ...)
taradd(tar, "....", ...)
taradd(tar, "etc/init.d/tinc", ...., ex=True)
tar.close()
tf.seek(0)
txt = tf.read()
tw.t.write(txt)
tw.t.write('^D')
tw.t.w.close()
tw.t.w = None
tw.close()

https://github.com/jbardin/scp.py
far from not actually answering the question which is asked, the above code provides an actual implementation of scp that is compatible with the openssh SCP protocol. personally i've not tested it with dropbear yet but it is code that actually answers the question that's in the subject line.
SCP != SFTP.