windows10-wifi.py

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#Copyright of David Bombal, 2021     #
#https://www.davidbombal.com         #
#https://www.youtube.com/davidbombal #
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# Import subprocess so we can use system commands
import subprocess

# Import the re module so that we can make use of regular expressions. 
import re

# Python allows us to run system commands by using a function provided by the subprocess module 
# (subprocess.run(<list of command line arguments goes here>, <specify the second argument if you want to capture the output>))
# The script is a parent process and creates a child process which runs the system command, 
# and will only continue once the child process has completed.
# To save the contents that gets sent to the standard output stream (the terminal) 
# we have to specify that we want to capture the output, 
# so we specify the second argument as capture_output = True. 
# This information gets stored in the stdout attribute. 
# The information is stored in bytes and we need to decode it to Unicode 
# before we use it as a String in Python.
command_output = subprocess.run(["netsh", "wlan", "show", "profiles"], capture_output = True).stdout.decode()

# We imported the re module so that we can make use of regular expressions. 
# We want to find all the Wifi names which is always listed after "ALL User Profile     :". 
# In the regular expression we create a group of all characters until the return escape sequence (\r) appears.
profile_names = (re.findall("All User Profile     : (.*)\r", command_output))

# We create an empty list outside of the loop where dictionaries with all the wifi 
# username and passwords will be saved.
wifi_list = list()

# If we didn't find profile names we didn't have any wifi connections, 
# so we only run the part to check for the details of the wifi and 
# whether we can get their passwords in this part.
if len(profile_names) != 0:
    for name in profile_names:
        # Every wifi connection will need its own dictionary which will be appended to the wifi_list
        wifi_profile = dict()
        # We now run a more specific command to see the information about the specific wifi connection 
        # and if the Security key is not absent we can possibly get the password.
        profile_info = subprocess.run(["netsh", "wlan", "show", "profile", name], capture_output = True).stdout.decode()
        # We use a regular expression to only look for the absent cases so we can ignore them.
        if re.search("Security key           : Absent", profile_info):
            continue
        else:
            # Assign the ssid of the wifi profile to the dictionary
            wifi_profile["ssid"] = name
            # These cases aren't absent and we should run them "key=clear" command part to get the password
            profile_info_pass = subprocess.run(["netsh", "wlan", "show", "profile", name, "key=clear"], capture_output = True).stdout.decode()
            # Again run the regular expressions to capture the group after the : which is the password
            password = re.search("Key Content            : (.*)\r", profile_info_pass)
            # Check if we found a password in the regular expression. All wifi connections will not have passwords.
            if password == None:
                wifi_profile["password"] = None
            else:
                # We assign the grouping (Where the password is contained) we are interested to the password key in the dictionary.
                wifi_profile["password"] = password[1]
            # We append the wifi information to the wifi_list
            wifi_list.append(wifi_profile) 

for x in range(len(wifi_list)):
    print(wifi_list[x])