import tkinter as tk
from tkinter import messagebox
from Crypto.Cipher import AES, Blowfish
import binascii

class NavicatPassword:
    def __init__(self):
        self.aes_key = b'libcckeylibcckey'
        self.aes_iv = b'libcciv libcciv '

    def decrypt(self, encrypted_str):
        try:
            data = binascii.unhexlify(encrypted_str.lower())
            cipher = AES.new(self.aes_key, AES.MODE_CBC, self.aes_iv)
            decrypted = cipher.decrypt(data)
            # 处理填充字符和不可打印字符
            # 去除填充字符和控制字符
            decrypted = decrypted.rstrip(b'\x00\x03\x04\x05')
            
            # 过滤掉控制字符（0x00-0x1F），保留可打印字符
            decrypted = bytes(b for b in decrypted if b >= 32 or b == 9 or b == 10 or b == 13)
            
            # 尝试多种编码方式
            encodings = ['utf-8', 'latin1', 'cp1252', 'gbk', 'big5']
            for encoding in encodings:
                try:
                    decoded = decrypted.decode(encoding)
                    # 保留所有可打印字符
                    return decoded
                except UnicodeDecodeError:
                    continue
            # 最后尝试，替换无法解码的字符
            return decrypted.decode('latin1', errors='replace')
        except Exception as e:
            raise ValueError(f"解密失败: {str(e)}")

class App:
    def __init__(self, root):
        self.root = root
        self.root.title("Navicat密码解密工具")
        self.result_window = None  # 用于存储结果窗口
        
        self.password = tk.StringVar()
        self.create_widgets()

    def create_widgets(self):
        tk.Label(self.root, text="加密密码:").grid(row=0, column=0, padx=5, pady=5)
        tk.Entry(self.root, textvariable=self.password, width=30).grid(row=0, column=1, padx=(0, 10))
        
        tk.Button(self.root, text="解密", command=self.decrypt_password).grid(row=1, column=1, pady=10)

    def show_result(self, result):
        # 如果结果窗口已经存在，则先销毁
        if self.result_window is not None:
            self.result_window.destroy()
            
        self.result_window = tk.Toplevel(self.root)
        self.result_window.title("解密结果")
        
        tk.Label(self.result_window, text="解密后的密码：").pack(padx=20, pady=5)
        
        # 使用更通用的字体，添加字体回退
        font_family = ('Consolas', 'Courier New', 'Monaco', 'DejaVu Sans Mono')
        font_size = 12
        result_text = tk.Text(self.result_window, height=1, width=30, font=(font_family[0], font_size))
        result_text.insert(tk.END, result)
        result_text.config(state=tk.DISABLED)
        result_text.pack(padx=20, pady=5)
        
        def copy_to_clipboard():
            self.root.clipboard_clear()
            self.root.clipboard_append(result)
            
        tk.Button(self.result_window, text="复制密码", command=copy_to_clipboard).pack(pady=10)
        
    def decrypt_password(self):
        password = self.password.get().strip()
        if not password:
            messagebox.showerror("错误", "请输入加密密码")
            return
            
        try:
            navicat = NavicatPassword()
            result = navicat.decrypt(password)
            self.show_result(result)
        except Exception as e:
            messagebox.showerror("错误", f"解密失败：{str(e)}")

if __name__ == "__main__":
    root = tk.Tk()
    app = App(root)
    root.mainloop()