def des_pwd_decrypt():
    with open('sent/encrypted_pwd_des.txt', 'r') as des_pwd_container:
        des_pwd_encrypted = des_pwd_container.readline()
    with open('sandbox_receiver/private_key_receiver.txt', 'r') as prv_key_radio:
        private_key_pair_string = prv_key_radio.readline()
    private_key_pair_string2pair_step_1 = private_key_pair_string.split(', ')

    # 手动实现removeprefix
    def remove_prefix(s, prefix):
        if s.startswith(prefix):
            return s[len(prefix):]
        return s

    # 手动实现removesuffix
    def remove_suffix(s, suffix):
        if s.endswith(suffix):
            return s[:-len(suffix)]
        return s

    # 修改原代码
    private_key_pair_string2pair_step_2_a = remove_prefix(private_key_pair_string2pair_step_1[0], '(')
    private_key_pair_string2pair_step_2_b = remove_suffix(private_key_pair_string2pair_step_1[1], ')')
    private_key_pair_string2pair_step_2_c = remove_suffix(private_key_pair_string2pair_step_1[2], ')')

    private_key_pair = int(private_key_pair_string2pair_step_2_a), int(private_key_pair_string2pair_step_2_b),int(private_key_pair_string2pair_step_2_c)
    #print(private_key_pair)
    rsa_private_key = RSA.construct(private_key_pair)# 使用解析出的 (n, e) 创建 RSA 公钥
    rsa_cipher = PKCS1_OAEP.new(rsa_private_key)

    # rsa_private_key = public_key.save_pkcs1()

    # 将 DES 密钥字符串编码为字节
    des_pwd_encrypted_bytes = bytes.fromhex(des_pwd_encrypted)

    # 使用 RSA 加密 DES 密钥
    decrypted_des_pwd = rsa_cipher.decrypt(des_pwd_encrypted_bytes)

    with open('inbox/desPassword.txt', 'wb') as des_password_file:
        des_password_file.write(decrypted_des_pwd)

    #print(decrypted_des_pwd)
    # 将加密后的 DES 密钥转换为十六进制字符串
    encrypted_des_pwd_hex = decrypted_des_pwd.hex()


    return decrypted_des_pwd