openai01.md

Rewrite done by openai

(PROMPT) rewrite this script in python3 and change the -s and -n args to be input from an input box , without argparse

#! /bin/bash
while getopts s:n: flag
do
    case "${flag}" in
       s) size=${OPTARG};;
       n) name=${OPTARG};;
          esac
done
gen  ()
{ head -c "$size" -z </dev/urandom > /tmp/keyfile  
 } 

hasher () 
{ cat /tmp/keyfile | while read -r line; do
    printf %s "$line" | sha512sum  | cut -f1 -d' '

    done; }

gen && hasher keyfile | tee "$name" &&  truncate --size "$size" "$name"

exit

Here is the Python3 script that rewrites the original script without using the argparse module and prompts the user for input from an input box:

(PROMPT) fix this error in above script

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-12-56c15e9d00d0> in <module>
     18 
     19 with open(name, 'w') as f:
---> 20     for h in hasher():
     21         f.write(h)
     22 

<ipython-input-12-56c15e9d00d0> in hasher()
     10 
     11 def hasher():
---> 12     with open('/tmp/keyfile', 'rb') as f:
     13         while True:
     14             chunk = f.read(8192)

FileNotFoundError: [Errno 2] No such file or directory: '/tmp/keyfile'

The error is occurring because the /tmp/keyfile file does not exist. To fix this error, the gen function should be called before the hasher function so that the /tmp/keyfile file is created and can be read by the hasher function.

Here is the updated script with the error fixed:

import os
import hashlib

size = int(input('Enter the size of the keyfile: '))
name = input('Enter the name of the keyfile: ')

def gen():
    with open('/tmp/keyfile', 'wb') as f:
        f.write(os.urandom(size))

def hasher():
    with open('/tmp/keyfile', 'rb') as f:
        while True:
            chunk = f.read(8192)
            if not chunk:
                break
            yield hashlib.sha512(chunk).hexdigest()

gen()
with open(name, 'w') as f:
    for h in hasher():
        f.write(h)

os.truncate(name, size)

In this updated script, the gen function is called before the hasher function so that the /tmp/keyfile file is created and can be read by the hasher function.