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Add terminal support for other than x-terminal-emulator

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This gets the terminal from which `gui.py` is executed and saves it into
the global `TERM` variable. Defaults to `x-terminal-emulator`.
Also autoformats the imports and code via black.
This commit is contained in:
M. B. Scheuck
2025-06-05 21:47:46 +02:00
parent 4e8426c8bb
commit 737e0c961d
1 changed files with 201 additions and 129 deletions
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330
gui.py
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@@ -1,106 +1,129 @@
import os
import re
import subprocess import subprocess
import sys import sys
import tkinter as tk import tkinter as tk
from tkinter import ttk, messagebox, simpledialog from tkinter import messagebox, simpledialog, ttk
import re
# Define the command to execute # Define the command to execute
FIDO_COMMAND = './fido2-manage.sh' FIDO_COMMAND = "./fido2-manage.sh"
#Command below for Windows
#FIDO_COMMAND = 'fido2-manage-ui.exe' # Checks the terminal emulator from which "gui.py" is executed
# and sets it for the subprocess commands
TERM = os.environ.get("TERM", "x-terminal-emulator")
# Command below for Windows
# FIDO_COMMAND = 'fido2-manage-ui.exe'
# Global variable to store the PIN # Global variable to store the PIN
pin = None PIN = None
# Function to get device list from fido2-manage-ui.exe # Function to get device list from fido2-manage-ui.exe
def get_device_list(): def get_device_list():
try: try:
# Execute the command with '-list' argument and capture the output # Execute the command with '-list' argument and capture the output
result = subprocess.run([FIDO_COMMAND, '-list'], capture_output=True, text=True) result = subprocess.run([FIDO_COMMAND, "-list"], capture_output=True, text=True)
# Split the output into lines and return as a list # Split the output into lines and return as a list
device_list = result.stdout.strip().split('\n') device_list = result.stdout.strip().split("\n")
return device_list return device_list
except Exception as e: except Exception as e:
# Handle exceptions (e.g., file not found or command error) # Handle exceptions (e.g., file not found or command error)
print(f"Error executing device list command: {e}") print(f"Error executing device list command: {e}")
return [] return []
# Function to execute storage command and prepend its output to the grid # Function to execute storage command and prepend its output to the grid
def execute_storage_command(device_digit): def execute_storage_command(device_digit):
global pin global PIN
command = [FIDO_COMMAND, '-storage', '-pin', pin, '-device', device_digit] command = [FIDO_COMMAND, "-storage", "-pin", PIN, "-device", device_digit]
try: try:
result = subprocess.run(command, capture_output=True, text=True) result = subprocess.run(command, capture_output=True, text=True)
# Check if the subprocess was executed successfully # Check if the subprocess was executed successfully
#print (result) # print (result)
if result.returncode == 0: if result.returncode == 0:
# Parse the output and insert into the treeview # Parse the output and insert into the treeview
for line in reversed(result.stdout.splitlines()): # Insert in reversed order to prepend for line in reversed(
result.stdout.splitlines()
): # Insert in reversed order to prepend
if ": " in line: if ": " in line:
key, value = line.split(": ", 1) key, value = line.split(": ", 1)
tree.insert("", 0, values=(key, value)) # Insert at the top of the grid tree.insert(
"", 0, values=(key, value)
) # Insert at the top of the grid
else: else:
raise subprocess.CalledProcessError(result.returncode, command) raise subprocess.CalledProcessError(result.returncode, command)
except Exception as e: except Exception as e:
messagebox.showerror("Error", f"Command execution failed: {e}\nOutput: {result.stderr}") messagebox.showerror(
"Error", f"Command execution failed: {e}\nOutput: {result.stderr}"
)
# Function to execute info command and append its output to the grid # Function to execute info command and append its output to the grid
def execute_info_command(device_digit): def execute_info_command(device_digit):
global pin global PIN
tree.delete(*tree.get_children()) tree.delete(*tree.get_children())
command = [FIDO_COMMAND, '-storage', '-pin', pin, '-device', device_digit] command = [FIDO_COMMAND, "-storage", "-pin", PIN, "-device", device_digit]
try: try:
result = subprocess.run(command, capture_output=True, text=True) result = subprocess.run(command, capture_output=True, text=True)
if result.stderr.find("FIDO_ERR_PIN_INVALID")!= -1: if result.stderr.find("FIDO_ERR_PIN_INVALID") != -1:
#exit # exit
messagebox.showerror("Error", f"Invalid PIN provided") messagebox.showerror("Error", f"Invalid PIN provided")
return return
# Check FIDO_ERR_PIN_AUTH_BLOCKED # Check FIDO_ERR_PIN_AUTH_BLOCKED
if result.stderr.find("FIDO_ERR_PIN_AUTH_BLOCKED")!= -1: if result.stderr.find("FIDO_ERR_PIN_AUTH_BLOCKED") != -1:
#exit # exit
messagebox.showerror("Error", f"Wrong PIN provided to many times. Reinsert the key") messagebox.showerror(
"Error", f"Wrong PIN provided to many times. Reinsert the key"
)
return return
# Check FIDO_ERR_PIN_REQUIRED # Check FIDO_ERR_PIN_REQUIRED
if result.stderr.find("FIDO_ERR_PIN_REQUIRED")!= -1: if result.stderr.find("FIDO_ERR_PIN_REQUIRED") != -1:
#exit # exit
messagebox.showerror("Error", f"No PIN set for this key. Passkeys can be managed only with a PIN set. You will be prompted to create a PIN on the next window") messagebox.showerror(
command = [FIDO_COMMAND, '-setPIN', '-device', device_digit] "Error",
if sys.platform.startswith('win'): f"No PIN set for this key. Passkeys can be managed only with a PIN set. You will be prompted to create a PIN on the next window",
subprocess.Popen(['start', 'cmd', '/c'] + command, shell=True) )
elif sys.platform.startswith('linux'): command = [FIDO_COMMAND, "-setPIN", "-device", device_digit]
subprocess.Popen(['x-terminal-emulator', '-e'] + command) if sys.platform.startswith("win"):
subprocess.Popen(["start", "cmd", "/c"] + command, shell=True)
elif sys.platform.startswith("linux"):
subprocess.Popen([TERM, "-e"] + command)
return return
# Check FIDO version
if result.stderr.find("FIDO_ERR_INVALID_CBOR") != -1:
# exit
messagebox.showerror(
"Error",
f"This is an older key (probably FIDO2.0). No passkey management is possible with this key. Only basic information will be shown.",
)
# Check FIDO version
if result.stderr.find("FIDO_ERR_INVALID_CBOR")!= -1:
#exit
messagebox.showerror("Error", f"This is an older key (probably FIDO2.0). No passkey management is possible with this key. Only basic information will be shown.")
# Check if the subprocess was executed successfully # Check if the subprocess was executed successfully
if result.returncode == 0: if result.returncode == 0:
# Parse the output and insert into the treeview # Parse the output and insert into the treeview
for line in result.stdout.splitlines(): for line in result.stdout.splitlines():
if ": " in line: if ": " in line:
key, value = line.split(": ", 1) key, value = line.split(": ", 1)
tree.insert("", tk.END, values=(key, value)) # Append to the end of the grid tree.insert(
"", tk.END, values=(key, value)
) # Append to the end of the grid
else: else:
raise subprocess.CalledProcessError(result.returncode, command) raise subprocess.CalledProcessError(result.returncode, command)
except Exception as e: except Exception as e:
messagebox.showerror("Error", f"Command execution failed: {e}\nOutput: {result.stderr}") messagebox.showerror(
command = [FIDO_COMMAND, '-info', '-pin', pin, '-device', device_digit] "Error", f"Command execution failed: {e}\nOutput: {result.stderr}"
)
command = [FIDO_COMMAND, "-info", "-pin", PIN, "-device", device_digit]
try: try:
result = subprocess.run(command, capture_output=True, text=True) result = subprocess.run(command, capture_output=True, text=True)
# Check if the subprocess was executed successfully # Check if the subprocess was executed successfully
@@ -109,46 +132,52 @@ def execute_info_command(device_digit):
for line in result.stdout.splitlines(): for line in result.stdout.splitlines():
if ": " in line: if ": " in line:
key, value = line.split(": ", 1) key, value = line.split(": ", 1)
tree.insert("", tk.END, values=(key, value)) # Append to the end of the grid tree.insert(
"", tk.END, values=(key, value)
) # Append to the end of the grid
else: else:
raise subprocess.CalledProcessError(result.returncode, command) raise subprocess.CalledProcessError(result.returncode, command)
except Exception as e: except Exception as e:
messagebox.showerror("Error", f"Command execution failed: {e}\nOutput: {result.stderr}") messagebox.showerror(
"Error", f"Command execution failed: {e}\nOutput: {result.stderr}"
)
# Function to set the PIN # Function to set the PIN
def set_pin(): def set_pin():
global pin global PIN
pin = simpledialog.askstring("PIN Code", "Enter PIN code (enter 0000 if no PIN is set/known):", show='*') PIN = simpledialog.askstring(
"PIN Code", "Enter PIN code (enter 0000 if no PIN is set/known):", show="*"
)
# Function to handle selection event # Function to handle selection event
def on_device_selected(event): def on_device_selected(event):
global pin global PIN
selected_device = device_var.get() selected_device = device_var.get()
# Extract the digit inside the first pair of square brackets # Extract the digit inside the first pair of square brackets
match = re.search(r'\[(\d+)\]', selected_device) match = re.search(r"\[(\d+)\]", selected_device)
pin = None PIN = None
set_pin() set_pin()
#print (pin) # print (pin)
if match: if match:
device_digit = match.group(1) device_digit = match.group(1)
if pin is not None: if PIN is not None:
execute_info_command(device_digit) execute_info_command(device_digit)
check_passkeys_button_state() check_passkeys_button_state()
check_changepin_button_state() check_changepin_button_state()
else: else:
messagebox.showinfo("Device Selected", "No digit found in the selected device") messagebox.showinfo("Device Selected", "No digit found in the selected device")
# Function to check if the "passkeys" button should be enabled # Function to check if the "passkeys" button should be enabled
def check_passkeys_button_state(): def check_passkeys_button_state():
passkeys_button_state = tk.DISABLED passkeys_button_state = tk.DISABLED
for child in tree.get_children(): for child in tree.get_children():
values = tree.item(child, 'values') values = tree.item(child, "values")
if values and len(values) == 2 and values[0] == 'existing rk(s)': if values and len(values) == 2 and values[0] == "existing rk(s)":
try: try:
rk_count = int(values[1]) rk_count = int(values[1])
if rk_count > 0: if rk_count > 0:
@@ -156,7 +185,7 @@ def check_passkeys_button_state():
break break
except ValueError: except ValueError:
pass pass
passkeys_button.config(state=passkeys_button_state) passkeys_button.config(state=passkeys_button_state)
@@ -164,8 +193,8 @@ def check_passkeys_button_state():
def check_changepin_button_state(): def check_changepin_button_state():
passkeys_button_state = tk.DISABLED passkeys_button_state = tk.DISABLED
for child in tree.get_children(): for child in tree.get_children():
values = tree.item(child, 'values') values = tree.item(child, "values")
if values and len(values) == 2 and values[0] == 'remaining rk(s)': if values and len(values) == 2 and values[0] == "remaining rk(s)":
try: try:
rk_count = int(values[1]) rk_count = int(values[1])
if rk_count > 0: if rk_count > 0:
@@ -173,47 +202,65 @@ def check_changepin_button_state():
break break
except ValueError: except ValueError:
pass pass
change_pin_button.config(state=passkeys_button_state) change_pin_button.config(state=passkeys_button_state)
# Function to handle "passkeys" button click # Function to handle "passkeys" button click
def on_passkeys_button_click(): def on_passkeys_button_click():
global pin global PIN
# Get the selected device and PIN # Get the selected device and PIN
selected_device = device_var.get() selected_device = device_var.get()
match = re.search(r'\[(\d+)\]', selected_device) match = re.search(r"\[(\d+)\]", selected_device)
if match: if match:
device_digit = match.group(1) device_digit = match.group(1)
#pin = simpledialog.askstring("PIN Code", "Enter PIN code (enter 0000 if no PIN is set/known):", show='*') # pin = simpledialog.askstring("PIN Code", "Enter PIN code (enter 0000 if no PIN is set/known):", show='*')
if pin is not None: if PIN is not None:
# Execute the command to get resident keys # Execute the command to get resident keys
command = [FIDO_COMMAND, '-residentKeys', '-pin', pin, '-device', device_digit] command = [
FIDO_COMMAND,
"-residentKeys",
"-pin",
PIN,
"-device",
device_digit,
]
try: try:
result = subprocess.run(command, capture_output=True, text=True) result = subprocess.run(command, capture_output=True, text=True)
if result.returncode == 0: if result.returncode == 0:
# Parse the domains from the output # Parse the domains from the output
domains = [] domains = []
for line in result.stdout.splitlines(): for line in result.stdout.splitlines():
match = re.search(r'= (.+)$', line) match = re.search(r"= (.+)$", line)
if match: if match:
domains.append(match.group(1)) domains.append(match.group(1))
# Execute the command for each domain # Execute the command for each domain
cumulated_output = [] cumulated_output = []
for domain in domains: for domain in domains:
domain_command = [FIDO_COMMAND, '-residentKeys', '-domain', domain, '-pin', pin, '-device', device_digit] domain_command = [
domain_result = subprocess.run(domain_command, capture_output=True, text=True) FIDO_COMMAND,
"-residentKeys",
"-domain",
domain,
"-pin",
PIN,
"-device",
device_digit,
]
domain_result = subprocess.run(
domain_command, capture_output=True, text=True
)
if domain_result.returncode == 0: if domain_result.returncode == 0:
cumulated_output.append(f"Domain: {domain}\n{domain_result.stdout}") cumulated_output.append(
f"Domain: {domain}\n{domain_result.stdout}"
)
else: else:
raise subprocess.CalledProcessError(domain_result.returncode, domain_command) raise subprocess.CalledProcessError(
domain_result.returncode, domain_command
)
# Show the cumulated output in a new window # Show the cumulated output in a new window
cumulated_output_str = "\n\n".join(cumulated_output) cumulated_output_str = "\n\n".join(cumulated_output)
@@ -221,30 +268,29 @@ def on_passkeys_button_click():
else: else:
raise subprocess.CalledProcessError(result.returncode, command) raise subprocess.CalledProcessError(result.returncode, command)
except Exception as e: except Exception as e:
messagebox.showerror("Error", f"Command execution failed: {e}\nOutput: {result.stderr}") messagebox.showerror(
"Error", f"Command execution failed: {e}\nOutput: {result.stderr}"
)
else: else:
messagebox.showinfo("Device Selected", "No digit found in the selected device") messagebox.showinfo("Device Selected", "No digit found in the selected device")
def change_pin(): def change_pin():
# Get the selected device and PIN # Get the selected device and PIN
selected_device = device_var.get() selected_device = device_var.get()
# Extract the digit inside the first pair of square brackets # Extract the digit inside the first pair of square brackets
match = re.search(r'\[(\d+)\]', selected_device) match = re.search(r"\[(\d+)\]", selected_device)
if match: if match:
device_digit = match.group(1) device_digit = match.group(1)
command = [FIDO_COMMAND, '-changePIN', '-device', device_digit] command = [FIDO_COMMAND, "-changePIN", "-device", device_digit]
if sys.platform.startswith('win'): if sys.platform.startswith("win"):
subprocess.Popen(['start', 'cmd', '/c'] + command, shell=True) subprocess.Popen(["start", "cmd", "/c"] + command, shell=True)
elif sys.platform.startswith('linux'): elif sys.platform.startswith("linux"):
subprocess.Popen(['x-terminal-emulator', '-e'] + command) subprocess.Popen([TERM, "-e"] + command)
pass pass
def refresh_combobox(): def refresh_combobox():
# Implement your refresh logic here # Implement your refresh logic here
# For example, you can update the values in the combobox # For example, you can update the values in the combobox
@@ -253,14 +299,13 @@ def refresh_combobox():
tree.delete(*tree.get_children()) tree.delete(*tree.get_children())
passkeys_button.config(state=tk.DISABLED) passkeys_button.config(state=tk.DISABLED)
change_pin_button.config(state=tk.DISABLED) change_pin_button.config(state=tk.DISABLED)
device_list = get_device_list() # Assuming you have a function to get the device list device_list = (
get_device_list()
) # Assuming you have a function to get the device list
if not device_list: if not device_list:
print("No devices found.") print("No devices found.")
device_combobox['values'] = device_list # Update the combobox values device_combobox["values"] = device_list # Update the combobox values
# Function to show the output in a new window # Function to show the output in a new window
def show_output_in_new_window(output, device_digit): def show_output_in_new_window(output, device_digit):
@@ -270,7 +315,9 @@ def show_output_in_new_window(output, device_digit):
new_window.title("Resident Keys / Passkeys") new_window.title("Resident Keys / Passkeys")
# Create a Treeview widget for displaying output # Create a Treeview widget for displaying output
tree_new_window = ttk.Treeview(new_window, columns=("Domain", "Credential ID", "User"), show="headings") tree_new_window = ttk.Treeview(
new_window, columns=("Domain", "Credential ID", "User"), show="headings"
)
# Set column headings # Set column headings
tree_new_window.heading("Domain", text="Domain") tree_new_window.heading("Domain", text="Domain")
tree_new_window.heading("Credential ID", text="Credential ID") tree_new_window.heading("Credential ID", text="Credential ID")
@@ -278,10 +325,14 @@ def show_output_in_new_window(output, device_digit):
tree_new_window.pack(expand=True, fill=tk.BOTH, padx=10, pady=10) tree_new_window.pack(expand=True, fill=tk.BOTH, padx=10, pady=10)
# Add scrollbars to the Treeview # Add scrollbars to the Treeview
tree_scrollbar_y = ttk.Scrollbar(new_window, orient="vertical", command=tree_new_window.yview) tree_scrollbar_y = ttk.Scrollbar(
new_window, orient="vertical", command=tree_new_window.yview
)
tree_scrollbar_y.pack(side="right", fill="y") tree_scrollbar_y.pack(side="right", fill="y")
tree_new_window.configure(yscrollcommand=tree_scrollbar_y.set) tree_new_window.configure(yscrollcommand=tree_scrollbar_y.set)
tree_scrollbar_x = ttk.Scrollbar(new_window, orient="horizontal", command=tree_new_window.xview) tree_scrollbar_x = ttk.Scrollbar(
new_window, orient="horizontal", command=tree_new_window.xview
)
tree_scrollbar_x.pack(side="bottom", fill="x") tree_scrollbar_x.pack(side="bottom", fill="x")
tree_new_window.configure(xscrollcommand=tree_scrollbar_x.set) tree_new_window.configure(xscrollcommand=tree_scrollbar_x.set)
@@ -294,31 +345,44 @@ def show_output_in_new_window(output, device_digit):
credential_id = line.split("Credential ID: ")[1].split(",")[0].strip() credential_id = line.split("Credential ID: ")[1].split(",")[0].strip()
user = line.split("User: ")[1].strip() user = line.split("User: ")[1].strip()
user = re.sub(re.escape(credential_id), "", user).strip() user = re.sub(re.escape(credential_id), "", user).strip()
tree_new_window.insert("", tk.END, values=(current_domain, credential_id, user)) tree_new_window.insert(
"", tk.END, values=(current_domain, credential_id, user)
)
# Function to handle show value button click # Function to handle show value button click
def show_selected_value(): def show_selected_value():
selected_item = tree_new_window.selection() selected_item = tree_new_window.selection()
if selected_item: if selected_item:
value = tree_new_window.item(selected_item, 'values')[1] # Get the Credential ID of the selected item value = tree_new_window.item(selected_item, "values")[
1
] # Get the Credential ID of the selected item
new_window.destroy() new_window.destroy()
command = [FIDO_COMMAND, '-delete', '-device', device_digit, '-credential', value] command = [
if sys.platform.startswith('win'): FIDO_COMMAND,
subprocess.Popen(['start', 'cmd', '/c'] + command, shell=True) "-delete",
elif sys.platform.startswith('linux'): "-device",
subprocess.Popen(['x-terminal-emulator', '-e'] + command) device_digit,
"-credential",
value,
]
if sys.platform.startswith("win"):
subprocess.Popen(["start", "cmd", "/c"] + command, shell=True)
elif sys.platform.startswith("linux"):
subprocess.Popen([TERM, "-e"] + command)
# Create the "Show Value" button # Create the "Show Value" button
show_value_button = tk.Button(new_window, text="delete passkey", command=show_selected_value) show_value_button = tk.Button(
new_window, text="delete passkey", command=show_selected_value
)
show_value_button.pack(pady=10) show_value_button.pack(pady=10)
def show_about_message(): def show_about_message():
messagebox.showinfo("About", "The FIDO2.1 Security Key Management Tool is a utility designed to manage and interact with FIDO2.1 security keys.\r\nIt provides functionalities to view information, manage relying parties, and perform various operations on connected FIDO2.1 devices.\r\n\r\n(c)TOKEN2 Sarl\r\nVersoix, Switzerland") messagebox.showinfo(
"About",
"The FIDO2.1 Security Key Management Tool is a utility designed to manage and interact with FIDO2.1 security keys.\r\nIt provides functionalities to view information, manage relying parties, and perform various operations on connected FIDO2.1 devices.\r\n\r\n(c)TOKEN2 Sarl\r\nVersoix, Switzerland",
)
# Create the main application window # Create the main application window
root = tk.Tk() root = tk.Tk()
@@ -338,7 +402,9 @@ device_list = get_device_list()
if not device_list: if not device_list:
device_list = "No devices found." device_list = "No devices found."
device_var = tk.StringVar() device_var = tk.StringVar()
device_combobox = ttk.Combobox(top_frame, textvariable=device_var, values=device_list, width=60) device_combobox = ttk.Combobox(
top_frame, textvariable=device_var, values=device_list, width=60
)
device_combobox.pack(side=tk.LEFT, padx=10, pady=10) device_combobox.pack(side=tk.LEFT, padx=10, pady=10)
device_combobox.bind("<<ComboboxSelected>>", on_device_selected) device_combobox.bind("<<ComboboxSelected>>", on_device_selected)
# Create the refresh button # Create the refresh button
@@ -351,7 +417,13 @@ tree_frame = ttk.Frame(root)
tree_frame.pack(expand=True, fill=tk.BOTH, padx=10, pady=10) tree_frame.pack(expand=True, fill=tk.BOTH, padx=10, pady=10)
tree_scrollbar_y = ttk.Scrollbar(tree_frame, orient="vertical") tree_scrollbar_y = ttk.Scrollbar(tree_frame, orient="vertical")
tree_scrollbar_x = ttk.Scrollbar(tree_frame, orient="horizontal") tree_scrollbar_x = ttk.Scrollbar(tree_frame, orient="horizontal")
tree = ttk.Treeview(tree_frame, columns=("Key", "Value"), show="headings", yscrollcommand=tree_scrollbar_y.set, xscrollcommand=tree_scrollbar_x.set) tree = ttk.Treeview(
tree_frame,
columns=("Key", "Value"),
show="headings",
yscrollcommand=tree_scrollbar_y.set,
xscrollcommand=tree_scrollbar_x.set,
)
tree_scrollbar_y.config(command=tree.yview) tree_scrollbar_y.config(command=tree.yview)
tree_scrollbar_x.config(command=tree.xview) tree_scrollbar_x.config(command=tree.xview)
tree_scrollbar_y.pack(side="right", fill="y") tree_scrollbar_y.pack(side="right", fill="y")
@@ -362,21 +434,21 @@ tree.heading("Value", text="Value")
tree.pack(expand=True, fill=tk.BOTH) tree.pack(expand=True, fill=tk.BOTH)
# Create the "passkeys" button # Create the "passkeys" button
passkeys_button = ttk.Button(root, text="Passkeys", state=tk.DISABLED, command=on_passkeys_button_click) passkeys_button = ttk.Button(
root, text="Passkeys", state=tk.DISABLED, command=on_passkeys_button_click
)
passkeys_button.pack(side=tk.LEFT, padx=5, pady=10) passkeys_button.pack(side=tk.LEFT, padx=5, pady=10)
# Create the "Change PIN" button # Create the "Change PIN" button
change_pin_button = ttk.Button(root, text="Change PIN", state=tk.DISABLED, command=change_pin) change_pin_button = ttk.Button(
root, text="Change PIN", state=tk.DISABLED, command=change_pin
)
change_pin_button.pack(side=tk.LEFT, padx=5, pady=10) change_pin_button.pack(side=tk.LEFT, padx=5, pady=10)
about_button = ttk.Button(root, text="About", command=show_about_message) about_button = ttk.Button(root, text="About", command=show_about_message)
about_button.pack(side=tk.RIGHT, padx=5, pady=10) about_button.pack(side=tk.RIGHT, padx=5, pady=10)
# Run the Tkinter main loop # Run the Tkinter main loop
root.mainloop() root.mainloop()