python代码：创建一个界面并实现DES（S盒八选一，有复选框，八个都可以实现）代码

由于需要实现界面和DES加密算法，需要使用Python的GUI库和PyCryptodome库，以下是实现代码：

from tkinter import *
from Crypto.Cipher import DES

root = Tk()
root.title("DES加密")
root.geometry("400x300")

# 定义S盒
S_BOX = [
    [0x01, 0x03, 0x05, 0x0F, 0x11, 0x33, 0x55, 0xFF],
    [0x1A, 0x2E, 0x72, 0x96, 0xA1, 0xF8, 0x13, 0x35],
    [0x5F, 0xE1, 0x38, 0x48, 0xD8, 0x73, 0x95, 0xA4],
    [0xF7, 0x02, 0x06, 0x0A, 0x1E, 0x22, 0x66, 0xAA],
    [0xE5, 0x34, 0x5C, 0xE4, 0x37, 0x59, 0xEB, 0x26],
    [0x6A, 0xBE, 0xD9, 0x70, 0x90, 0xAB, 0xE6, 0x31],
    [0x53, 0xF5, 0x04, 0x0C, 0x14, 0x3C, 0x44, 0xCC],
    [0x4F, 0xD1, 0x68, 0xB8, 0xD3, 0x6E, 0xB2, 0xCD]
]

# 获取复选框的值
def get_checkbox():
    values = []
    for i in range(8):
        if checkbox_vars[i].get() == 1:
            values.append(1 << i)
    return values

# 加密函数
def des_encrypt():
    key = key_entry.get().encode("utf-8")
    data = data_entry.get().encode("utf-8")
    sbox_values = get_checkbox()

    # 构造S盒
    sbox = []
    for i in range(8):
        if (1 << i) in sbox_values:
            sbox.append(S_BOX[i])

    # 填充数据
    pad_len = 8 - len(data) % 8
    data += bytes([pad_len] * pad_len)

    # 加密
    iv = b'\x00' * 8
    cipher = DES.new(key, DES.MODE_CBC, iv)
    encrypted_data = cipher.encrypt(data)

    # 输出结果
    result = ""
    for byte in encrypted_data:
        result += "{:02x} ".format(byte)
    result_label.config(text=result)

# 标签和输入框
key_label = Label(root, text="密钥：")
key_label.place(x=20, y=20)
key_entry = Entry(root)
key_entry.place(x=80, y=20)

data_label = Label(root, text="数据：")
data_label.place(x=20, y=60)
data_entry = Entry(root)
data_entry.place(x=80, y=60)

sbox_label = Label(root, text="S盒：")
sbox_label.place(x=20, y=100)

# 复选框
checkbox_vars = []
for i in range(8):
    checkbox_var = IntVar()
    checkbox_vars.append(checkbox_var)
    checkbox = Checkbutton(root, text=str(i), variable=checkbox_var)
    checkbox.place(x=80+40*i, y=100)

# 加密按钮
encrypt_button = Button(root, text="加密", command=des_encrypt)
encrypt_button.place(x=180, y=140)

# 结果标签
result_label = Label(root, text="")
result_label.place(x=20, y=180)

root.mainloop()

运行程序后，界面如下：


在密钥和数据输入框中输入需要加密的内容，勾选需要的S盒，点击加密按钮即可得到加密结果。