PIN.py

from tkinter import *
from tkinter import ttk
from tkinter import messagebox


class PIN(Toplevel):
    def __init__(self, skeleton_key):
        Toplevel.__init__(self)

        self.skeleton_key = skeleton_key
        self.auth = False

        self.title("Confirm PIN")
        self.resizable(False, False)
        self.geometry("+540+360")
        self.iconbitmap("Icons\\V2.ico")

        # ttk style config
        self.ttk_style = ttk.Style()
        self.ttk_style.configure("TButton", font="Courier 8", justify="c")

        # top canvas
        self.top_canvas = Canvas(self, width=160, height=80, bg="lightgrey")
        self.lock_icon = PhotoImage(file="Icons\\lock.png")
        self.top_canvas.create_image(84, 42, image=self.lock_icon)
        self.top_canvas.grid(row=0, column=0, sticky="ew")

        # bottom frame
        self.bottom_frame = Frame(self, bg="#f0eb4b")
        self.bottom_frame.grid(row=1, column=0, sticky="news")

        # entry box
        Label(
            self.bottom_frame, text="*Confirm PIN  ", font="Courier 8", bg="#f0eb4b"
        ).grid(column=0, row=0, pady=(6, 0), sticky="ns")
        self.user_pin = Entry(
            self.bottom_frame, font="Terminal 10", justify="c", show="✱"
        )
        self.user_pin.focus_force()
        self.user_pin.grid(column=0, row=0, padx=(10, 12), pady=(36, 0), sticky="n")

        self.cancel_button = ttk.Button(
            self.bottom_frame, text="Cancel", width=8, command=self.destroy
        )
        self.cancel_button.grid(
            column=0, row=3, pady=(54, 12), padx=(88, 0), sticky="w"
        )

        def _login(_event=None):
            master_pin = self.user_pin.get()
            if master_pin == skeleton_key[1]:
                self.auth = True
                self.destroy()
            else:
                messagebox.showwarning("Error", "Wrong PIN!", icon="warning")

        self.confirm_button = ttk.Button(
            self.bottom_frame, text="Confirm", width=8, command=_login
        )
        self.confirm_button.grid(
            column=0, row=3, pady=(54, 12), padx=(14, 0), sticky="w"
        )

        self.lift()
        self.bind("<Return>", _login)
        self.wait_window()


# simple secondary check after user been logged in, un-encrypted compare PIN input vs skeleton_key in memory
def pin_check(skeleton_key):
    pin = PIN(skeleton_key)
    if pin.auth:
        return True
    else:
        return False